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Xapian-core 1.0.11 (2009-03-15):
API: * Enquire::get_mset(): + Now throws UnimplementedError if there's a percentage cutoff and sorting is primarily by value - this has never been correctly supported and it's better to warn people than give incorrect results. + No longer needlessly copies the results internally. + When searching multiple databases, now recalculates the maximum attainable weight after each database which may allow it to terminate earlier. (ticket#336). + Fix inconsistent percentage scores when sorting primarily by value, except when a MatchDecider is also being used; document this remaining problem case. (ticket#216) * Enquire::set_sort_by_value() (and similar methods): Rename the wrongly named "ascending" parameter to "reverse", and note that its value should always be explicitly given since defaulting to "reverse=true" is confusing and the default will be deprecated in 1.1.0. (ticket#311) * Database::allterms_begin(): Fix memory leak when iterating all terms from more than one database. * Query::get_terms_begin(): Don't return "" from the TermIterator (happened when the query contained or was Query::MatchAll). * Add QueryParser::FLAG_DEFAULT to make it easier to add flags to those set by default. testsuite: * The testsuite now reports problems detected by valgrind with newer valgrind versions. Drop support for running the testsuite under valgrind < 3.3.0 (well over a year old) as this greatly simplifies the configure tests. * Fix usage message for options which take arguments in --help output from test programs - "-x=foo" doesn't work, the correct syntax is "-x foo". * If comparing MSet percentages fails, report the differing percentages if in verbose mode. * Add test that backends don't truncate total document length to 32 bits. * Disable lockfileumask1 (regression testcase added in 1.0.10) on Cygwin and on OS/2. flint backend: * The configure test for pread() and pwrite() got accidentally disabled in 0.8.4 and we've always been using llseek() followed by read() or write() since then. The configure test is now fixed, and gives a slight speedup (3% measured for searching). * The child process used to implement WritableDatabase locking now changes directory to / so that it doesn't block unmounting of any partitions and closes any open file descriptors which aren't relating to locking so that if those files are closed by our parent and deleted the disk space gets released right away. * We now reuse the same zlib zstream structures rather than using a fresh one for each operation. This doesn't make a measurable difference in our own tests on Linux but reportedly is measurably faster on some systems. (ticket #325) quartz backend: * The pread()/pwrite() fix also speeds up quartz. remote backend: * Avoid copying Query::Internal objects needlessly when unserialising Query objects. inmemory backend: * Store the (non-normalised) document lengths as Xapian::termcount (unsigned int) rather than Xapian::doclength (double) which saves 4 bytes per document. build system: * configure: The output of g++ --version changed format (again) with GCC 4.3 which meant configure got "g++" for the version. Instead use the (hopefully) more robust technique of using g++ -E to pull out __GNUC__ and __GNUC_MINOR__. documentation: * API documentation: + WritableDatabase::flush() can't throw DatabaseLockError. + WritableDatabase's constructor can throw at least DatabaseCorruptError or DatabaseLockError. + Document how to get all matches from Enquire::get_mset(). + Other minor improvements. * docs/sorting.html: Clarify meaning. portability: * Fix "#line" directives in generated file queryparser/queryparser_internal.cc to give a relative path - previously they had a full path when generated by a VPATH build (as release tarballs are), and this confused GCC 2.95 and depcomp. * Fix for compiling with Sun's compiler (untested as we no longer have access to it). Xapian-core 1.0.10 (2008-12-23): API: * Composing an OP_NEAR query with two non-term subqueries now throws UnimplementedError instead of AssertionError (in a --enable-assertions build) or leading to unexpected results (otherwise). This partly addresses bug#201. * Using a MultiValueSorter with no values set no longer causes a hang or segmentation fault (but it is still rather pointless!) matcher: * If we're using values for sorting and for another purpose, cache the Document::Internal object created to get the value for sorting, like we do between other uses. flint backend: * If the disk became full while flushing database changes to disk, the WritableDatabase object would throw a DatabaseError exception but be left in an inconsistent state such that further use could lead to the database on disk ending up in a "corrupt" state (theoretically fixable, but no tool to fix such a database exists). Now we try to ensure that the object is left in a consistent state, but if doing so throws a further exception, we put the WritableDatabase object in a "closed" state such that further attempts to use it throw an exception. * Create the lockfile "flintlock" with permissions 0666 so that the umask is honoured just like we do for the other files (previously we used 0600). Previously it wasn't possible to lock a database for update if it was owned by another user, even if you otherwise had sufficient permissions via "group" or "other". * Fix garbled exception message when a base file can't be reread. quartz backend: * Fix garbled exception message when a base file can't be reread. remote backend: * xapian-tcpsrv and xapian-progsrv now accept -w as a short form of --writable, as was always intended. build system: * This release now uses newer versions of the autotools (autoconf 2.62 -> 2.63; automake 1.10.1 -> 1.10.2). documentation: * INSTALL: Add new paragraphs about HP's aCC and IRIX (adapted from footnotes in PLATFORMS). * PLATFORMS: HP testdrive has been shut down, so all mark all those machines as "no longer available". Update atreus' build report to 1.0.10. * docs/queryparser.html: Add link to valueranges.html. examples: * delve: Add missing "and" to --help output. Report termfreq and collection freq for each term we're asked about. portability: * Fix to build with GCC 4.4 snapshot. Xapian-core 1.0.9 (2008-10-31): API: * Database::get_spelling_suggestion() is now faster (15% speed up for parsing queries with FLAG_SPELLING_CORRECTION set in a test on real world data). * Fix OP_ELITE_SET segmentation fault due to excess floating point precision on x86 Linux (and possibly other platforms). * Database::allterms_begin() over multiple databases now gives a TermIterator with operations O(log(n)) rather than potentially O(n) in the number of databases. * Add new Database methods metadata_keys_begin() and metadata_keys_end() to allow the complete list of metadata in a database to be retrieved (this API addition is needed so that copydatabase can copy database metadata). testsuite: * Remove the cached test databases before running the testsuite. * apitest: Fix cursordelbug1 to work on Microsoft Windows (bug#301). * apitest,queryparsertest: Skip tests which fail because the timer granularity is too coarse to measure how long the test took. In practice, this is only an issue on Microsoft Windows (bug#300 and bug#308). matcher: * Adjust percent cutoff calculations in the matcher in a way which corresponds to the change to percentage calculations made in 1.0.7 to allow for excess precision. * Query::MatchAll no longer gives match results ranked by increasing document length. flint backend: * xapian-compact: Fix crash while compacting spelling table for a single database when built with MSVC, and probably other platforms, though Linux got lucky and happened to work (bug#305). build system: * configure: Disable -Wconversion for now - it's not useful for older GCC and is buggy in GCC 4.3. * configure: Set -Wstrict-overflow to 1 instead of 5, to avoid unreasonable warnings under GCC 4.3. documentation: * Minor improvements to API documentation, including documenting the XAPIAN_FLUSH_THRESHOLD environmental variable in WriteableDatabase::flush() (bug#306). * valueranges.html: Fix typos in example code, and drop superfluous empty destructor from ValueRangeProcessor subclass. * HACKING: Several improvements. examples: * copydatabase: Also copy user metadata. Xapian-core 1.0.8 (2008-09-04): API: * Fix output of RSet::get_description testsuite: * Report subtotals per backend, rather than per testgroup per backend to make the output easier to read. flint backend: * Fix WritableDatabase::add_document() and replace_document() not to be O(n*n) in the number of values in the new document. * Fix handling of a table created lazily after the database has had commits, and which is then cursored while still in sequential mode. * Fix failure to remove all the Btree entries in some cases when all the postings for a term are removed. (bug#287) * xapian-inspect: Show the help message on start-up. Correct the documented alias for next from ' ' to ''. Avoid reading outside of input string when it is empty. (bug#286) quartz backend: * Backport fix from flint for WritableDatabase::add_document() and replace_document() not to be O(n*n) in the number of values in the new document. build system: * configure: Report bug report URL in --help output. * xapian-config: Report bug report URL in --help output. * configure: Fix deprecation error for --enable-debug=full to say to instead use '--enable-assertions --enable-log' not '--enable-debug --enable-log'. documentation: * valueranges.html: Expand on some sections. examples: * quest: Fix to catch QueryParserError instead of const char * which QueryParser threw in Xapian < 1.0.0. * copydatabase: Use C++ forms of C headers. Only treat '\' as a directory separator on platforms where it is. Update counter every 13 counting up to the end so that the digits all "rotate" and the counter ends up on the exact total. portability: * Eliminate literal top-bit-set characters in testsuite source code. Xapian-core 1.0.7 (2008-07-15): API: * OP_VALUE_RANGE, OP_VALUE_GE, and OP_VALUE_LE: + If there were gaps in the document id numbering, these operators could return document ids which weren't present in the database. This has been fixed. + These operators are now more efficient when there are a lot of "missing" document ids (bug#270). + Optimise Query(OP_VALUE_GE, <n>, "") to Query::MatchAll. * Xapian::QueryParser: + QueryParser now stops parsing immediately when it hits a syntax error. This doesn't change behaviour, but does mean failing to parse queries is now more efficient. + Cases of O(N*N) behaviour have been fixed. * Xapian::Stem now recognises "nl" as an alias for "dutch" (debian bug 484458). * Setting sort by value was being ignored by a Xapian::Enquire object which had previously had a Xapian::Sorter set (bug#256). testsuite: * Improved test coverage in a few places. matcher: * When using a MatchDecider, we weren't reducing matches_lower_bound unless all the potential results were retrieved, which led to the lower bound being too high in some such cases. * We now track how many documents were tested by a MatchDecider and how many of those it rejected, and set matches_estimated based on this rate. Also, matches_upper_bound is reduced by the number of rejected documents. * Fixed matches_upper_bound in some cases when collapsing and using a MatchDecider. * Fixed matches_lower_bound when collapsing and using a percentage cutoff. * When using two or more of a MatchDecider, collapsing, or a percentage cutoff, we now only round the scaled estimate once, and we also round it to the nearest rather than always rounding down. Hopefully this should improve the estimate a little in such cases. * Fix problem on x86 with the top match getting 99% rather than 100% (caused by excess precision in an intermediate value). flint backend: * If Database::reopen() is called and the database revision on disk hasn't changed, then do as little work as possible. Even if it has changed, don't bother to recheck the version file (bug#261). * xapian-compact: + Fix check for user metadata key to not match other key types we may add in the future. When compacting, we can't assume how we should handle them. + If the same user metadata key is present in more than one source database with different tag values, issue a warning and copy an arbitrary tag value. + Fix potential SEGV when compacting database(s) with user metadata but no postings. + In error message, refer to "iamflint" as the "version file", not the "meta file". * xapian-inspect: + Print top-bit-set characters as escaped hex forms as they often won't be valid UTF-8 sequences. + If we're passed a database directory rather than a single table, issue a special error message since this is an obvious mistake for users to make. * Fix cursor handling for a modified table which has previously only had sequential updates which usually manifested as zlib errors (bug#259). quartz backend: * Fix cursor handling for a modified table which has previously only had sequential updates which usually manifested as incorrect data being returned (bug#259). * Calling skip_to() as the first operation on an all-documents PostingIterator now works correctly. remote backend: * Improve performance of matches with multiple databases at least one of which is remote, and when the top hit is from a remote database (bug#279). * When remote protocol version doesn't match, the error message displayed now shows the minor version number supplied by the server correctly. * We now wait for the connection to close after sending MSG_SHUTDOWN for a WritableDatabase, which ensures that changes have been written to disk and the lock released before the WritableDatabase destructor returns (as is the case with a local database). * We no longer ever send MSG_SHUTDOWN for a read-only Database - just closing the connection is enough (and is protocol compatible). inmemory backend: * Fix bug which resulted in the values not being stored correctly when replacing an existing document, or if there are gaps in the document id numbering. build system: * This release now uses newer versions of the autotools (autoconf 2.61 -> 2.62; automake 1.10 -> 1.10.1; libtool 1.5.24 -> 1.5.26). The newer autoconf reportedly results in a faster configure script, and warns about use of unrecognised configure options. * Fix configure to recognise --enable-log=profile and fix build problems when this is enabled. * "make up" in the "tests" subdirectory now does "make" in the top-level. * Fix "make distcheck" by using dist-hook to install generated files from either srcdir or builddir, with the appropriate dependency to generate them automatically in maintainer mode builds. documentation: * intro_ir.html: Improve wording a bit. * The documentation now links to trac instead of bugzilla. For links to the main website, we now prefer xapian.org to www.xapian.org. * Doxygen-generated API documentation: + Improved documentation in several places. + The helper macro XAPIAN_VISIBILITY_DEFAULT no longer appears in the output. + Header and directory relationship graphs are no longer generated as they aren't actually informative here. * HACKING: Numerous updates and improvements. examples: * quest: Output get_description() of the parsed query. portability: * Fix build with GCC 2.95.3. * Fix build with GCC 4.3. * Newer libtool features improved support for Mac OS X Leopard and added support for AIX 6.1. debug code: * Database::get_spelling_suggestion() now debug logs with category APICALL rather than SPELLING, for consistency with all other API methods. * Added APICALL logging to a few Database methods which didn't have it. * Remove debug log tracing from get_description() methods since logging for other methods calls get_description() methods on parameters, so logging these calls just makes for more confusing debug logs. A get_description() method should have no side-effects so it's not very interesting even when explicitly called by the user. Xapian-core 1.0.6 (2008-03-17): API: * Add new query operators OP_VALUE_LE and OP_VALUE_GE which perform "single ended" range checks, and a corresponding new Query constructor. * Add Unicode::toupper() to complement Unicode::tolower(). * Xapian::Stem has been further optimised - stemtest now runs ~2.5% faster. testsuite: * tests/runtest: Fixed to handle test programs with a ".exe" extension. * tests/queryparsertest: Add a couple more testcases which already work to improve test coverage. * tests/apitest: Add caseconvert1 testcase to test Unicode::tolower() and Unicode::toupper(). flint backend: * xapian-check: Fix not to report an error for a database containing no postings but some user metadata. * Update the base files atomically to avoid problems with reading processes finding partially written ones. * Create lazy tables with the correct revision to avoid producing a database which we later report as "corrupt" (bug#232). * xapian-compact: Fix compaction for databases which contain user metadata keys. quartz backend: * Update the base files atomically to avoid problems with reading processes finding partially written ones. remote backend: * The addition of OP_VALUE_LE and OP_VALUE_GE required an update to the Query serialisation, which required a minor remote protocol version bump. * Fix to actually set the writing half as the connection as non-blocking when a timeout is specified. This would have prevented timeouts from operating correctly in some situations. build system: * configure: GCC warning flag overhaul: Stop passing "-Wno-multichar" since any multi-character character literal is bound to be a typo (I believe we were only passing it after misinterpreting its sense!) Pass "-Wformat-security", and "-Wconversion" for all GCC versions. Add "-Winit-self" and "-Wstrict-overflow=5" for GCC >= 4.2. The latter might prove too aggressive, but seems reasonable so far. Fix some minor niggles revealed by "-Wconversion" and "-Wstrict-overflow=5". * Add XAPIAN_NORETURN() annotations to functions and non-virtual methods which don't return. documentation: * docs/intro_ir.html: Briefly mention how pure boolean retrieval is supported. * docs/valueranges.html: Fix example of using multiple VRPs to come out as a "program listing". * include/xapian/queryparser.h: Fix incorrect example in doccomment. * docs/quickstart.html: Remove information covered by INSTALL since there's no good reason to repeat it and two copies just risks one getting out of date (as has happened here!) * docs/quickstart.html: Fix very out of date reference to MSet::items (bug#237). * PLATFORMS: Remove reports for 0.8.x as they're too old to be interesting. Separate out 0.9.x reports. Add Solaris 9 and 10 success reports from James Aylett. Update from Debian buildd logs. portability: * Now builds on OS/2, thanks to a patch by Yuri Dario. * Fix testsuite to build on mingw (broken by changes in 1.0.5). debug code: * Fix --enable-assertions build, broken by changes in 1.0.5. Xapian-core 1.0.5 (2007-12-21): API: * More sophisticated sorting of results is now possible by defining a functor subclassing Xapian::Sorter (bug#100). * Xapian::Enquire now provides a public copy constructor and assignment operator (bug#219). * Xapian::Document::values_begin() didn't ensure that values had been read when working on a Document read from a database. However, values_end() did (and so did values_count()) so this wasn't generally a problem in practice. * Xapian::PostingIterator::skip_to() now works correctly when running over multiple databases. * Xapian::Database::postlist_begin() no longer adds a "MultiPostList" wrapper for the common case when there's only one subdatabase. * Xapian::TradWeight now avoids division by zero in the (rare) situation of the average document length being zero (which can only happen if all documents are empty or only have terms with wdf 0). * Calling Xapian::WritableDatabase methods when we don't have exactly one subdatabase now throws InvalidOperationError. testsuite: * apitest: + Testcases now describe the conditions they need to run, and are automatically collated by a Perl script. This makes it significantly easier to add a new testcase. + The test harness's "BackendManager" has been overhauled to allow cleaner implementations of testcases which are currently hard to write cleanly, and to make it easier to add new backend settings. + Add a "multi" backend setting which runs suitable tests over two subdatabases combined. There's a corresponding new make target "check-multi". + Add more feature tests of document values. + sortrel1 now runs for inmemory too. + Add simple feature test for TradWeight being used to run a query. + Fix spell3 to work on Microsoft Windows (bug#177). + API classes are now tested to check they have copy constructors and assignment operators, and also that most have a default constructor. + quartztest testcases adddoc2 and adddoc3 have been reworked as apitest testcases adddoc5 and adddoc6, which run for other backends. + stubdb1 now explicitly creates the database it needs - generally this bug didn't manifest because an earlier test has already created it. * queryparsertest: Add feature tests to check that ':' is being inserted between prefix and term when it should be. * Fix extracting of valgrind error messages in the test harness. * tests/valgrind.supp: Add more variants of the zlib suppressions. matcher: * Xapian::Enquire: When the "first" parameter to get_mset() is non-zero, avoid copying all the wanted items after performing the match. * Fix bug in handling a pure boolean match over more than one database under set_docid_order(ASCENDING) - we used to exit early which isn't correct. * When collapsing on a value, give a better lower bound on the number of matches by keeping track of the number of empty collapse values seen. * Xapian::BM25Weight: Fix bug when k2 is non-zero: a non-initialised value influenced the weight calculations. By default k2 is zero, so this bug probably won't have affected most users. * The mechanism used to collate term statistics across multiple databases has been greatly simplified (bug#45). flint backend: * xapian-check: + Update to handle flint databases produced by Xapian 1.0.3 and later. + Fix not to go into an infinite loop if certain checks fail. quartz backend: * quartzcompact: Fix equality testing of C strings to use strcmp() rather than '=='! In practice, using '==' often gives the desired effect due to pooling of constant strings, but this may have resulted in a bug on some platforms. remote backend: * If we're doing a match with only one database which is remote then just return the unserialised MSet from the remote match. This requires an update to the MSet serialisation, which requires a minor remote protocol version bump. build system: * XO_LIB_XAPIAN now hooks LT_INIT as well as AC_PROG_LIBTOOL and AM_PROG_LIBTOOL. * Distribute preautoreconf, dir_contents, docs/dir_contents and tests/dir_contents. * Fix preautoreconf to correctly handle all the sources passed to doxygen to create the collated internal source documentation, and to work in a VPATH build. documentation: * sorting.html: New document on the topic of sorting match results. * HACKING,admin_notes.html,bm25.html,glossary.html,intro_ir.html,overview.html, quickstart.html,scalability.html,termgenerator,html,synonyms.html: Assorted minor improvements. * valueranges.html: State explicitly that Xapian::sortable_serialise() is used to encode values at index time, and give an example of how it is called. * API documentation: + Clarify get_wdf() versus get_termfreq(). + We now use pngcrush to reduce the size of PNG files in the HTML version. + The HTML version no longer includes various intermediate files which doxygen generates. + Hide the v102 namespace from Doxygen as it isn't user visible. + Stop describing get_description() as an "Introspection method", as this doesn't help to explain what it does, and get_description() doesn't really fall under common formal definitions of "introspection". * index.html: Add a list of documents on particular topics and include links to previously unlinked-to documents. Weed down the top navigation bar which had grown to unwieldy length. * PLATFORMS: Update for Debian buildds. * Improve documentation comment for Document::termlist_count(). * admin_notes.html: Note that this document is up-to-date for 1.0.5. * INSTALL: zlib 1.2.0 apparently fixes a memory leak in deflateInit2(), which we use, so that's another reason to prefer 1.2.x. portability: * Add explicit includes of C headers needed to build with the latest snapshots of GCC 4.3. Fix new warnings. * xapian-config: On platforms which we know don't need explicit dependencies, --ltlibs now gives the same output as --libs. * The minimum supported GCC version is now 2.95.3 (rather than 2.95) as 2.95.3 added support for '#include <sstream>' which means we no longer need to maintain our own version. * Fix build with SGI's compiler on IRIX. * Fix or suppress some MSVC warnings. debug code: * Remove incorrect assertion in MultiAndPostList (bug#209). * Fix build when configured with "--enable-log --disable-assertions". Xapian-core 1.0.4 (2007-10-30): API: * Query: + Add OP_SCALE_WEIGHT operator (and a corresponding constructor which takes a single subquery and a parameter of type "double"). This multiplies the weights from the subquery by the parameter, allowing adjustment of the importance of parts of the query tree. + Deprecate the essentially useless constructor Query(Query::op, Query). * QueryParser: + A field prefix can now be set to expand to more than one term prefix. Similarly, multiple term prefixes can now be applied by default. This is done by calling QueryParser::add_boolean_prefix() or QueryParser::add_prefix() more than once with the same field name but a different term prefix (previously subsequent calls with the same field name had no effect). + Trying to set the same field as probabilistic and boolean now throws InvalidOperationError. + Fix parsing of `term1 site:example.org term2', broken by changes in 1.0.2. + Drop special treatment for unmatched ')' at the start of the query, as it seems rather arbitrary and not particularly useful and was causing us to parse `(site:example.org) -term' incorrectly. + The QueryParser now generates pure boolean Query objects for strings such as `site:example.org' by applying OP_SCALE_WEIGHT with a factor of 0.0. + Fix handling of `"quoted phrase" +term' and `"quoted phrase" -term'. + Fix handling of `site:example.org -term'. + Fix problem with spelling correction of hyphenated terms (or other terms joined with phrase generators): the position of the start of the term wasn't being reset for the second term in the generated phrase, resulting in out of bounds errors when substituting the new value in the corrected query string. + The parser stack is now a std::vector<> rather than a fixed size, so it will typically use less memory, and can't hit the fixed limit. + Fix handling of STEM_ALL and update the documentation comment for QueryParser::set_stemming_strategy() to explain how it works clearly. * PostingIterator: positionlist_begin() and get_wdf() should now always throw InvalidOperationError where they aren't meaningful (before in some cases UnimplementedError was thrown). testsuite: * Add tests for new features. * Add another valgrind suppression for a slightly different error from zlib in Ubuntu gutsy. * Remove quartztest's test_postlist1 and test_postlist2, replacing the coverage lost by extending and adding tests which work with other backends as well. * If a test throws a subclass of std::exception, the test harness now reports the class name and the extra information returned by std::exception's what() method. matcher: * Several performance improvements have been made, mainly to the handling of OP_AND and related operations (OP_FILTER, OP_NEAR, and OP_PHRASE). In combination, these are likely to speed up searching significantly for most users - in tests on real world data we've seen savings of 15-55% in search times). These improvements are: + OP_AND of 3 or more sub-queries is now processed more efficiently. + Sub-queries from adjacent OP_AND, OP_FILTER, OP_NEAR, and OP_PHRASE are now combined into a single multi-way OP_AND operation, and the filters which implement the near/phrase restrictions are hoisted above this so they need to check fewer documents (bug#23). + If an OP_OR or OP_AND_MAYBE decays to OP_AND, we now ensure that the less frequent sub-query is on the left, which OP_AND is optimised to expect. * When the Enquire::get_mset() parameter checkatleast is set, and we're sorting by relevance with forward ordering by docid, and the query is pure boolean, the matcher was deciding it was done before the checkatleast requirement was satisfied. Then the adjustments made to the estimated and max statistics based on checkatleast meant the results claimed there were exactly msize results. This bug has now been fixed. * Queries involving an OP_VALUE_RANGE filter now run around 3.5 times faster (bug#164). * The calculations behind MSet::get_matches_estimated() were always rounding down fractions, but now round to the nearest integer. Due to cumulative rounding, this could mean that the estimate is now a few documents higher in some cases (and hopefully a better estimate). * Implement explicit swap() methods for internal classes MSetItem and ESetItem which should make the final sort of the MSet and ESet a little more efficient. flint backend: * Fixed a bug introduced in 1.0.3 - trying to open a flint database for reading no longer fails if it isn't writable. * We no longer use member function pointers in the Btree implementation which seems to speed up searching a little. remote backend: * The remote protocol minor version has been increased (to accommodate OP_SCALE_WEIGHT). If you are upgrading a live system which uses the remote backend, upgrade the servers before the clients. build system: * Added macro machinery to allow branch prediction hints to be specified and used by compilers which support this (current GCC and Intel C++). * In a developer build, look for rst2html.py if rst2html isn't found as some Linux distros have it installed under with an extension. documentation: * In the API documentation, explicitly note that Database::get_metadata() returns an empty string when the backend doesn't support user-specified metadata, and that WritableDatabase::set_metadata() throws UnimplementedError in this case. Also describe the current behaviour with multidatabases. * README: Remove the ancient history lesson - this material is better left to the history page on the website. * deprecation.html: + Deprecate the non-pythonic iterators in favour of the pythonic ones. + Move "Stem::stem_word(word)" in the bindings to the right section (it was done in 1.0.0, as already indicated). + Improve formatting. * When running rst2html, using "--verbose" was causing "info" messages to be included in the HTML output, so drop this option and really fix this issue (which was thought to have been fixed by changes in 1.0.3). * install.html: Reworked - this document now concentrates on giving a brief overview of building which should be suitable for most common cases, and defers to the INSTALL document in each tarball for more details. * PLATFORMS: Update from tinderbox and buildbot. * remote.html: xapian-tcpsrv has been able to handle concurrent read access since 0.3.1 (7 years ago) so update the very out-of-date information here. Also, note that some newer features aren't supported by the remote backend yet. * HACKING: Note specifically that std::list::size() is O(n) for GCC. * intro_ir.html: Add link to the forthcoming book "Introduction to Information Retrieval", which can be read online. * scalability.html: Update size of gmane. * quartzdesign.html: Note that Quartz is now deprecated. debug code: * The debug assertion code has been rewritten from scratch to be cleaner and pull in fewer other headers. Xapian-core 1.0.3 (2007-09-28): API: * Add support for user specified metadata (bug#143). Currently supported by the flint and inmemory backends. * Deprecate Enquire::register_match_decider() which has always been a no-op. * Improve the lower bound on the number of matching documents for an AND query - if the sum of the lower bounds for the two sides is greater than the number of documents in the database, then some of them must have both terms. * Spelling correction: Fix off-by-one error in loop bounds when initialising (bug#194). * If the check_at_least parameter to Enquire::get_mset() is used, but there aren't that many results, then MSet::get_matches_lower_bound() and MSet::get_matches_upper_bound() weren't always reported as equal - this bug is now fixed. * When sorting by value, and using the check_at_least parameter to Enquire::get_mset(), some potential matches weren't being counted. * Failing to create a flint or quartz database because we couldn't create the directory for it now throws DatabaseCreateError not DatabaseOpeningError. testsuite: * Fix display of valgrind output when a test fails because valgrind detected a problem. * Add another version of valgrind suppression for the zlib end condition check as this gives a different backtrace for zlib in Ubuntu gutsy. flint backend: * The Flint database format has been extended to support user metadata, and each termlist entry is now a byte shorter (before compression). As a result, Xapian 1.0.2 and earlier won't be able to read Xapian 1.0.3 databases. However, Xapian 1.0.3 can read older databases. If you open an older flint database for writing with Xapian 1.0.3, it will be upgraded such that it cannot then be read by Xapian 1.0.2 and earlier. * Zlib compression wasn't being used for the spelling or synonym tables (due to a typo - Z_DEFAULT_COMPRESSION where it should be Z_DEFAULT_STRATEGY). * xapian-check: Allow "db/record." and "db/record.DB" as arguments. * Fix "key too long" exception message by substituting FLINT_BTREE_MAX_KEY_LEN with its numeric value. * Assorted minor efficiency improvements. * If we reach the flush threshold during a transaction, we now write out the postlist changes, but don't actually commit them. * Check length of new terms is at most 245 bytes for flint in add_document() and replace_document() so that the API user gets an error there rather than when flush() is called (explicitly or implicitly). Fixes bug#44. * Flint used to read the value of the environmental variable XAPIAN_FLUSH_THRESHOLD when the first WritableDatabase was opened and would then cache this value. However the program using Xapian may have changed it, so we now reread it each time a WritableDatabase is opened. * Implement TermIterator::positionlist_count() for the flint backend. remote backend: * Fix the result of MSet::get_matches_lower_bound() when using the check_at_least parameter to get_mset(). inmemory backend: * Implement TermIterator::positionlist_count() for the inmemory backend. build system: * xapian-config: We always need to include dependency_libs in the output of `xapian-config --libs` if shared libraries are disabled. * Distribution tarballs are now in the POSIX "ustar" format. This supports pathnames longer than 99 characters (which we now have a few instances of in the doxygen generated documentation) and also results in a distribution tarball that is about half the size! This format should be readable by any tar program in current use - if your tar program doesn't support it, we'd like to know (but note that the GNU tar tarball is smaller than the size reduction in the xapian-core tarball...) * configure no longer generates msvc/version.h - this is now entirely handled by the MSVC-specific makefiles. documentation: * Add a glossary. * docs/stemming.html: Reorder the initial paragraphs so we actually answer the question "What is a stemming algorithm?" up front. * When running rst2html, use "--exit-status=warning" rather than "--strict". The former actually gives a non-zero exit status for a warning or worse, while the former doesn't, but does include any "info" messages in the output HTML. * docs/deprecation.rst: Add "Database::positionlist_begin() throwing RangeError and DocNotFoundError". * valueranges.rst: Correct out-of-date reference to float_to_string. * HACKING: Document a few more "coding standards". * PLATFORMS: Updated. * docs/overview.html: Restore HTML header accidentally deleted in November 2006. * Fix several typos. portability: * Add missing instances of "#include <string.h>" to fix compilation with recent GCC 4.3 snapshots. * Fix some warnings for various compilers and platforms. Xapian-core 1.0.2 (2007-07-05): API: * Xapian now offers spelling correction, based on a dynamically maintained list of spelling "target" words. This is currently supported by the flint backend, and works when searching multiple databases. * Xapian now offers search-time synonym expansion, based on an externally provided synonym dictionary. This is currently supported by the flint backend, and works when searching multiple databases. * TermGenerator: now offers support for generating spelling correction data. * QueryParser: + New flag FLAG_SPELLING_CORRECTION to enable spelling correction, and a new method, "get_corrected_query_string()" to get the spelling corrected query string. + New flags have been added to allow the new synonym expansion feature to be enabled and controlled. Synonym expansion can either be automatic, or only for terms explicitly indicated in the query string by the new "~" operator. + The precedence of the boolean operators has been adjusted to match their usual precedence in mathematics and programming languages. "NOT" now binds as tightly as "AND" (previously "AND NOT" would bind like "AND", but just "NOT" would bind like "OR"!) Also "XOR" now binds more tightly than "OR", but less tightly than "AND" (previously it bound just like "OR"). + '+' and '-' have been fixed to work on bracketed subexpressions as documented. + If the stemmer is "none", no longer put a Z prefix on terms; this now matches the output of TermGenerator. * Add new Xapian::sortable_serialise() and Xapian::sortable_unserialise() functions which serialise and unserialise numbers (currently only doubles) to a string representation which sorts in numeric order. Small integers have a short representation. * NumberValueRangeProcessor has been changed to work usefully. Previously the numbers had to be the same length; now numbers are serialised to strings such that a string sort on the string orders the numbers correctly. Negative and floating point numbers are also supported now. The old NumberValueRangeProcessor is still present in the library to preserve ABI compatibility, but code linking against 1.0.2 or later will pick up the new implementation, which really lives in a sub-namespace. * Documents now have a get_docid() method, to get the document ID from the database they came from. * Add support for a new type of match decider, called a "matchspy". Unlike the old deciders, this will reliably be tested on every candidate document, so can be used to tally statistics on them. * Fixed a segfault when getting a description for a MatchNothing query joined with AND_NOT (bug #176). * Header files have been tidied up to remove some unnecessary includes. Applications using "#include <xapian.h>" will not be affected. We don't intend to support direct inclusion of individual header files from the xapian directory, but if you do that, you may have to update you code. testsuite: * Feature tests added for all new features. * Improved test coverage in queryparsertest. Some tests in queryparsertest now use flint databases, so the test now ensures that the .flint subdirectory exists. * The test harness no longer creates <dbdir>/log for flint (flint doesn't create a log like quartz does). * apitest: "-bremote" must now be "-bremoteprog" (to better match "-bremotetcp"); "-bvoid" must now be "-bnone" (to better describe not using a database backend). * To complement "make check-flint", "make check-quartz", and "make check-remote", you can now run tests for the remotetcp backend with "make check-remotetcp", for the remoteprog backend with "make check-remoteprog", for the inmemory backend with "make check-inmemory", and tests not requiring a backend with "make check-none". * Several extra tests of the check_at_least parameter supplied to get_mset() were added. * Fix memory leak and fd leak in remotetcp handling, so apitest now passes under valgrind. * quartztest: no longer test QuartzPostList::get_collection_freq(), which has been removed. * Add regression test emptyquery2 for bug #176. * Add regression test matchall1 for bug with MatchAll queries. * Enhanced test coverage of match functor, to check that it returns all matching documents. matcher: * Fix bug when check_at_least was supplied - the matches after the requested MSet size were being returned to the user. The parameter is also now handled in a more efficient way - no extra memory is required (previously, extra memory proportional to the value of check_at_least was required). * Fix bug which used incorrect statistics, and caused assertion failures, when performing a search using a MatchAll query. * Optimisation for single term queries: we don't need to look at the top document's termlist to determine that it matches all the query terms. flint backend: * The value and position tables are now only created if there is anything to add to them. So if you never use document values, there's no value.DB, value.baseA, or value.baseB. This means the table doesn't need to be opened for searching (saving a file handle and a number of syscalls) and when flushing changes, we don't need to update baseA/baseB just to keep the revisions in step. The flint database version has been increased, but the new code will happily open and read/update flint databases from Xapian 1.0.0 and 1.0.1. Xapian 1.0.2 flint databases can't be read by Xapian 1.0.1 or earlier though. * Two new optional tables are now supported: "spelling", which is used to store information for spelling correction, and "synonym", which is used to store synonym information. * xapian-compact: Now compacts and merges spelling and synonym tables. Also has a new option "--no-renumber" to preserve document ids from source databases. * xapian-check: Now checks the spelling and synonym tables (only the Btree structure is currently checked, not the information inside). * Database::term_exists(), Database::get_termfreq(), and Database::get_collection_freq() are now slightly more efficient for flint databases. * New utility 'xapian-inspect' which allowing interactive inspection of key/tag pairs in a flint Btree. Useful for development and debugging, and an approximate equivalent to quartzdump. * WritableDatabase::delete_document() no longer cancels pending changes if the document doesn't exist. * Fix handling of exceptions during commit - previously, this could result in tables getting out-of-sync, perhaps even resulting in a corrupt database. * Optimise iteration of all documents in the case where all the document IDs up to lastdocid are used; in this case, we no longer need to access disk to get the document IDs. quartz backend: * WritableDatabase::delete_document() no longer cancels pending changes if the document doesn't exist. * We no longer create a postlist just to find the termfreq or collection frequency. remote backend: * Calling WritableDatabase::delete_document() on a non-existent document now correctly propagates DocNotFoundError. * The minor remote protocol version has increased (to fix the previous issue). You should be able to cleanly upgrade a live system by upgrading servers first and then clients. * progclient: Reopen stderr on the child process to /dev/null rather than closing it. This fixes apitest with the remoteprog backend to pass when run under valgrind (it failed in this case in 1.0.0 and 1.0.1). It probably has no effect otherwise. * check_at_least is now passed to the remote server to reduce the work needed to produce the match, and the serialised size of the returned MSet. inmemory backend: * Bug fix: using replace_document() to add a document with a specific document id above the highest currently used would create empty documents for all document ids in between. build system: * Work around an apparent bug in automake which causes the entries in .libs subdirectories generated for targets of bin_PROGRAMS not to be removed on make clean. This was causing make distcheck to fail. * Snapshots and releases are now bootstrapped with automake 1.10, and libtool 1.5.24. * HTML documentation generated from RST files is now installed. documentation: * The API documentation is now generated with Doxygen 1.5.2, which fixes the missing docs for Xapian::Query. * Ship and install internals.html. * Generating the doxygen-collated documentation of the library internals (with "make doxygen_source_docs") now only tries to generate an HTML version. The PDF version kept exceeding TeX limits, and HTML is a more useful format for this anyway. * API docs for Xapian::QueryParser now make it clear that the default value for the stemming strategy is STEM_NONE. * API docs now describe the NumberValueRangeProcessor more clearly. * Several typo fixes and assorted wording improvements. * queryparser.html: Mention "AND NOT" as an alternative way to write "NOT", and document synonym expansion. * admin_notes.html: Updated for changes in this release, and corrected a few minor errors. * spelling.rst: New file, documenting the spelling correction feature. * synonyms.rst: New file, documenting the synonyms expansion feature. * valueranges.rst: The NumberValueRangeProcessor is now documented. * HACKING: Mention new libtool, and more details about preferring pre-increment. Also add a note about 2 space indentation of protection level declarations in classes. * INSTALL: note that zlib must be installed before you can build. examples: * copydatabase: Now copies synonym and spelling data. Also, fix a cosmetic bug with progress output when a specified database directory has a trailing slash. portability: * Fix to build on with OpenBSD's zlib (xapian-core 1.0.0 and 1.0.1 didn't). * Fixed to build with older zlib such as zlib 1.1.5 which Solaris apparently uses (xapian-core 1.0.0 and 1.0.1 didn't). However, we recommend using zlib 1.2.x as decompressing is apparently about 20% faster. * msvc/version.h.in: Generated version.h for MSVC build no longer has the remote backend marked as disabled. * Fix warnings from Intel's C++ compiler. * Fixes for compilation with gcc-2.95 and GCC 4.3 snapshots. packaging: * RPMs: + Rename xapian.spec to xapian-core.spec to match tarball name. + Append the user name to BuildRoot. debug code: * Better debug logging from the queryparser internals. Xapian-core 1.0.1 (2007-06-11): API: * Xapian::Error: + Make Error::error_string member std::string rather than char * to avoid problems with double free() with copied Error objects. Unfortunately this mean an incompatible ABI change which we had hoped to avoid until 1.1.0, but in this case there didn't seem to be a sane way to fix the problem without an ABI change. + Error::get_description() now converts my_errno to error_string if it hasn't been already rather than not including any error description in this case. + Add new method "get_description()" to get a string describing the error object. This is used in various examples and scripts, improving their error reporting. * Xapian::Database: Add new form of allterms_begin() and allterms_end() which allow iterating of all terms with a particular prefix. This is easier to use than checking the end condition yourself, and is more efficiently implemented for the remote backend (fixes bug#153). * Xapian::Enquire: Passing an uninitialised Database object to Enquire will now cause InvalidArgumentError to be thrown, rather than causing a segfault when you call Enquire::get_mset(). If you really want an empty database, you can use Xapian::InMemory::open() to create one. * Xapian::QueryParser: Multiple boolean prefixed terms with the same term prefix are now combined with OR before such groups are combined with AND (bug#157). Multiple value ranges on the same value are handled similarly. * Xapian::Query OP_VALUE_RANGE: Avoid calling db->get_lastdocid() repeatedly as we know the answer won't change - this reduces the run time of a particular test case by 25%. testsuite: * Add test for serialisation of error strings. * Improved output in various situations: + Quote strings in TEST_STRINGS_EQUAL(). + queryparsertest: Use TEST_STRINGS_EQUAL when comparing query descriptions against their expected output, since this makes it much easier to see the differences. + Report whole message for exceptions, rather than a truncated version, in verbose mode. + Make use of Xapian::Error::get_description(), giving better error reports. * queryparsertest: New test of custom ValueRangeProcessor subclass (qp_value_customrange1). * apitest: flintdatabaseformaterror1 and flintdatabaseformaterror2 now use a genuine Xapian 0.9.9 flint database for their tests, and more cases are tested. The two tests have also been split into 3 now. * Fix test harness not to invoke undefined behaviour in cases where a paragraph of test data contains two or fewer characters. * Implement a better fix for the MSVC ifstream issue which was fixed in 1.0.0. This fixes an unintentional side-effect of the previous fix which meant that apitest's consistency1 wasn't working as intended (it now has a regression test to make sure it is testing what we intend). flint backend: * xapian-compact: Don't uncompress and recompress tags when compacting a database. This speeds up xapian-compact rather a lot (by more than 50% in a quick test). * If the docid counter wraps, Flint now throws DatabaseError (fixes bug#152). * Remove the special case error message for pre-0.6 databases since they'll be quartz format (the check is only in flint because this code was taken from quartz). quartz backend: * If the docid counter wraps, Quartz now throws DatabaseError (fixes bug#152). remote backend: * The remote protocol now has a minor version number. If the major version number is the same, a client can work with any server with the same or higher minor version number, which makes upgrading live systems easier for most remote protocol changes - just upgrade the servers first. * When a read-only remote database is closed, the client no longer sends a (totally bogus) MSG_FLUSH to the server, and the reply is also eliminated. This reduces the time taken to close a remote database a little (fixes bug#149). inmemory backend: * skip_to() on an allterms TermIterator from an InMemory Database can no longer move backwards. * An allterms TermIterator now initialises lazily, which can save some work if the first operation is a skip_to() (as it often will be). build system: * Fix VPATH compilation in maintainer mode with gcc-2.95. * Fix multiple target rule for generating the queryparser source files in parallel builds. * Distribute missing stub Makefiles for "bin", "examples", and "include/xapian". documentation: * Document the design flaw with NumberValueRangeProcessor and why it shouldn't be used. * ValueRangeProcessor and subclasses now have API documentation and an overview document. * Expand documentation of value range Query constructor. * Improved API documentation for the TermGenerator class. * docs/deprecation.rst: + Fix copy and paste error - set_sort_forward() should be changed to set_docid_order(). + Improve entry for QueryParserError. * PLATFORMS: Updated from tinderbox. examples: * copydatabase: Rewritten to use the ability to iterate over all the documents in a database. Should be much more efficient for databases with sparsely distributed document IDs. * simpleindex: Rewritten to use the TermGenerator class, which eliminates a lot of non-Xapian related code and is more typical of what a user is likely to want to do. * simplesearch,simpleexpand: Rewritten to use the QueryParser class, which is more typical of what a user is likely to want to do. portability: * xapian-config: Add special case check for host_os matching linux* or k*bsd-gnu since vanilla libtool doesn't correctly probe link_all_deplibs=no for them. packaging: * RPMs: Add "# norootforbuild" comment which SuSE's build scripts look for. Rename "Source0:" to "Source:" as there's only one tarball now. Add gcc-c++ and zlib-devel to "Build-Requires:". * The required automake version has been lowered to 1.8.3, so RPMs can now be built on RHEL 4 and SLES 9. Xapian-core 1.0.0 (2007-05-17): API: * Xapian::Database: + The Database(const std::string &) constructor has been marked as "explicit". Hopefully this won't affect real code, but it's possible. Instead of passing a std::string where a Xapian::Database is expected, you'll now have to explicitly write `Xapian::Database(path)' instead of `path'. + Fixed problem when calling skip_to() on an allterms iterator over multiple databases which could cause a debug assertion in debug builds, and possible misbehaviour in normal builds. * Xapian::Error: + The constructors of Error subclasses which take a `const std::string &' parameter are now explicit. This is very unlikely to affect any real code but if it does, just write `Xapian::Error(msg)' instead of `msg'. + Xapian::Error::get_type() now returns const char* rather than std::string. Generally existing code will just work (only one change was required in Xapian itself) - the simplest change is to write `std::string(e.get_type())' instead of `e.get_type()'. + Previously, the errno value was lost when an error was propagated from a remote server to the client, because errno values aren't portable between platforms. To fix this, Error::get_errno() is now deprecated and you should use Error::get_error_string() instead, which returns a string expanded from the errno value (or other system error code). * Xapian::QueryParser: + Now assumes input text is encoded as UTF-8. + We've made several changes to term generation strategy. Most notably: Unicode support has been added; '_' now counts as a word character; numbers and version numbers are now parsed as a single term; single apostrophes are now included in a term; we now store unstemmed forms of all terms; and we no longer try to "normalise" accents. + parse_query() now throws the new Xapian::Error subclass QueryParserError instead of throwing const char * (bug#101). + Pure NOT queries are now supported (for example, `NOT apples' will match all documents not indexed by the stemmed form of `apples'). You need to enable this feature by passing QueryParser::FLAG_PURE_NOT in flags to QueryParser::parse_query(). + We now clear the stoplist when we parse a new query. + Queries such as `+foo* bar', where no terms in the database match the wildcard `foo*', now match no documents, even if `bar' exists. Handling of `-foo*' has also been fixed. + Now supports wildcarding the last term of a query to provide better support for incremental searching. Enabled by QueryParser::FLAG_PARTIAL. + The default prefix can now be specified to parse_query() to allow parsing of text entry boxes for particular fields. + QueryParser::set_stemming_options() has been deprecated since 0.9.0 and has now been removed. * Xapian::Stem: + Now assumes input text is encoded as UTF-8. + We've updated to the latest version of the Snowball stemmers. This means that a small number of words produce different (and generally better) stems and that some new stemmers are supported: german2 (like german but normalises umlauts), hungarian, kraaij_pohlmann (a different Dutch stemmer), romanian, and turkish. * Xapian::TermGenerator: + New class which generates terms from a piece of text. * Xapian::Enquire: + The Enquire(const Database &) constructor has been marked as "explicit". This probably won't affect real code - certainly no Xapian API methods or functions take an Enquire object as a parameter - but calls to user methods or functions taking an Enquire object could be affected. In such cases, you'll now have to explicitly write `Xapian::Enquire(db)' instead of `db'. + Enquire::get_eset() now produces better results when used with multiple databases - without USE_EXACT_TERMFREQ they should be much more similar to results from an equivalent single database; with USE_EXACT_TERMFREQ they should be identical. + Track the minimum weight required to be considered for the MSet separately from the minimum item which could be considered. Trying to combine the two caused several subtle bugs (bug#86). + Enquire::get_query() is now `const'. Should have no effect on user code. + Enquire::get_mset() now handles the common case of an "exact" phrase search (where the window size is equal to the number of terms) specially. + Enquire::include_query_terms and Enquire::use_exact_termfreq are now deprecated in favour of capitalised versions Enquire::INCLUDE_QUERY_TERMS and Enquire::USE_EXACT_TERMFREQ (for consistency with our other manifest constants, and general C/C++ conventions). * Xapian::RSet: + RSet::contains(MSetIterator) is now `const'. Should have no effect on user code. * Xapian::SimpleStopper::add() now takes `const std::string &' not `const std::string'. Should have no effect on user code. * Xapian::Query: + We now only perform internal validation on a Query object when it's either constructed or changed, to avoid O(n^2) behaviour in some cases. + Xapian::Query::MatchAll (an alias for Query("")) matches all terms in the document (useful for "pure NOT" queries) and Xapian::Query:MatchNothing is now a more memorable alias for Query(). * Instead of explicitly checking that a term exists before opening its postlist, we now do both in one operation, which is more efficient. * MatchDecider::operator() now returns `bool' not `int'. * ExpandDecider::operator() now returns `bool' not `int'. * Xapian::TermIterator::get_termfreq() now throws InvalidOperationError if called on a TermIterator from a freshly created Document (since there's no meaningful term frequency as there's no Database for context). * <xapian/output.h> is no longer available as an externally visible header. It's not been included by <xapian.h> since 0.7.0. Instead of using `cout << obj;' use `cout << obj.get_description();'. * New constant Xapian::BAD_VALUENO which is -1 cast to Xapian::valueno. * New Xapian::ValueRangeProcessor hierarchy: DateValueRangeProcessor, NumberValueRangeProcessor, and StringValueRangeProcessor. In conjunction with the new QueryParser::add_valuerangeprocessor() method and the new Query::OP_VALUE_RANGE op these allow you to implement ranges in the query parser, such as `$50..100', `10..20kg', `01/02/2007..03/04/2007'. testsuite: * Many new and improved testcases in various areas. * If a test throws an unknown exception, say so in the test failure message. If it throws std::string, report the first 40 characters (or first line if less than 40 characters) of the string even in non-verbose mode. * Use of valgrind improved: + The test harness now only hooks into valgrind if environment variable XAPIAN_TESTSUITE_VALGRIND is set, which makes it easy to run test programs under valgrind in the normal way. The runtest script sets this automatically. + runtest now passes "--leak-resolution=high" to valgrind to prevent unrelated leak reports related to STL classes from being combined. + configure tests for valgrind improved and streamlined. + New runsrv script to run xapian-tcpsrv and xapian-progsrv. We need to run these under valgrind to avoid issues with excess numerical precision in valgrind's FP handling, but we can use "--tool=none" which is a lot faster than running them under valgrind's default memcheck tool. * The test harness now starts xapian-tcpsrv in a more reliable way - it will try sequentially higher port numbers, rather than failing because a xapian-tcpsrv (or something else) is already using the default port. It also no longer leaks file descriptors (which was causing later tests to fail on some platforms), and if xapian-tcpsrv fails to start, the error message is now reported. * remotetest has been removed and its testcases have either been added to apitest or just removed if redundant with tests already in apitest. * termgentest is a new test program which tests the Xapian::TermGenerator class. * TEST_EQUAL_DOUBLE() now uses a slightly less stringent threshold - DBL_EPSILON is too strict for calculations which include multiple steps. Also, we now use it instead of doubles_are_equal_enough() and weights_are_equal_enough() which try to perform the same job. * New macro TEST_STRINGS_EQUAL() which displays the strings on separate lines so the differences can be clearly seen. * Test programs are now linked with '-no-install' which means that libtool doesn't need to generate shell script wrappers for them on most platforms. * runtest: Now turns on MALLOC_CHECK_ and MALLOC_PERTURB_ for glibc if valgrind isn't being used. * Better support for Microsoft Windows: + test_emptyterm2 no longer tries to delete a database from disk while a WritableDatabase object still exists for it, since this isn't supported under Microsoft Windows. + Fallback handling when srcdir isn't specified how takes into account .exe extensions and different path separators. flint backend: * Flint is now the default backend. * xapian-check: New program which performs consistency checks on a flint database or table. * xapian-compact: Now prunes unused docids off the start of each source database's range of docids. * Positional information is now encoded using a highly optimised fls() implementation, which is much faster than the FP code 0.9.x used. Unfortunately the old encoding could occasionally add extra bits on some architectures, which was harmless except the databases wouldn't be portable. Because of this, the flint format has had to be changed incompatibly. * The lock file is now called "flintlock" rather than "flicklock" (which was a typo!) * Flint now releases its lock correctly if there's an error in WritableDatabase's constructor. Previously the lock would remain until the process exited. * Flint now throws new Xapian::Error subclass DatabaseVersionError instead of DatabaseOpeningError when it fails to open a database because it has an unsupported version. DatabaseVersionError is a subclass of DatabaseOpeningError so existing code should continue to work, but it's now much easier to determine if the problem is that a database needs rebuilding. * If you try to open a flint database with an older or newer version than flint understands, the exception message now gives the version understood, rather than "I only understand FLINT_VERSION" (literally). * If we fail to obtain the lock, report why in the exception message. * Flint now compresses tags in the record and termlist tables using zlib. * More robust code to handle the flint locking child process, in case of unexpected errors. * If a document was replaced more than once between flushes, the document length wouldn't be updated after the first change. quartz backend: * Quartz is still supported, but use in new projects is deprecated (use Flint instead). Quartz will be removed eventually. * quartzcheck: Test if this is a quartz database by looking at "meta" not "record_DB". If "record_DB" is >= 2GB and we don't have a LFS aware stat function then stat can fail even though the file is there. Also open the database explicitly as a Quartz database for extra robustness. * If a document was replaced more than once between flushes, the document length wouldn't be updated after the first change. remote backend: * The remote backend is now supported under Microsoft Windows. * Open a fresh copy of the database(s) on each connection to a xapian-tcpsrv rather than relying on being able to share a database across fork() or between threads (which we don't promise will work). * xapian-tcpsrv: New "--interface" option allows the hostname or address of the interface to listen on to be specified (the default is the previous behaviour of listening on all interfaces). * If name lookup fails, report the h_errno code from gethostbyname() rather than whatever value errno happens to currently have! * Fix bugs in query unserialisation. * The remote backend now supports all operations (get_lastdocid(), and postlist_begin() have now been implemented). * Currently a read-only server can be opened as a WritableDatabase (which is a minor bug we plan to fix). In this case, operations which write will fail and the exception is now InvalidOperationError not NetworkError. * If a remote server catches NetworkTimeoutError then it will now only propagate it if we can send it right away (since the connection is probably unhappy). After that (and for any other NetworkError) we now just rethrow it locally to close the connection and let it be logged if required. * The timeout parameter to RemoteDatabase wasn't being used, instead the client would wait indefinitely for the server to respond. * A timeout of zero to the remote backend now means "never timeout". This is now the default idle timeout for WritableDatabase (the connection timeout default is now 10 seconds, rather than defaulting to the idle timeout). * Fix handling of the document length in remote termlists. * The remote backend now checks when decoding serialised string that the length isn't more than the amount of data available (bug#117). * The remote term now handles the unique term variants of delete_document and replace_document on the server side. * The RSet serialisation now encodes deltas between docids (rather than the docids themselves) which greatly reduces the size of the encoding of a sparse RSet for a large database. * We now encode deltas between term positions when sending data after calling positionlist_begin() on a remote database. * When using a MatchDecider with remote database(s), don't rerun the MatchDecider on documents which a remote server has already checked. * Apply the "decreasing weights with remote database" optimisation which we use in the sort_by_relevance case in the sort_by_relevance_then_value case too. * We now throw NetworkError rather than InternalError for invalid data received over the remote protocol. * We now close stderr of the spawned backend program when using the "prog" form of the remote backend. Previously stderr output would go to the client application's stderr. muscat36 backend: * Support for the old Muscat 3.6 backends has been completely removed. It's still possible to convert Muscat 3.6 databases to Xapian databases by building 0.9.10 and using copydatabase to create a quartz database, which can then be read by 1.0.0 (and converted to a flint database using copydatabase again). build system: * We've added GCC visibility annotations to the library, which when using GCC version 4.0 or later reduce the size and load time of the library and increase the runtime speed a little. Under x86_64, the stripped library is 6.4% smaller (1.5% smaller with debug information). * configure: If using GCC, use -Bsymbolic-functions if it is supported (it requires a very recent version of ld currently). This option reduces the size and load time of the shared library by resolving references within the library when it's created. * We automatically define _FORTIFY_SOURCE in config.h if GCC is in use and it's not already set (you can override this as documented in INSTALL). This adds some checking (mostly at compile time) that important return values aren't ignored and that array bounds aren't exceeded. * `./configure --enable-quiet' already allows you to specify at configure time to pass `--quiet' to libtool. Now you can override this at make-time by using `make QUIET=' (to turn off `--quiet') or `make QUIET=y' (to turn on `--quiet'). * In non-maintainer mode, we don't need the tools required to rebuild some of the documentation, so speed up configure by not even probing for them in this common case. * The makefiles now use non-recursive make in all directories except "docs" and "tests". For users, this means that the build is faster and requires less disk space (bug#97). * configure: Add proper detection for SGI's C++ (check stderr output of "CC -v") and automatically pass -ptused in CXXFLAGS for xapian-core and any applications using xapian-config --cxxflags since it seems to be required to avoid template linking errors. * XO_LIB_XAPIAN now checks for the case where XAPIAN_CONFIG wasn't specified and xapian-config wasn't found, but the library appears to be installed - this almost certainly means that the user has installed xapian-core from a package, but hasn't installed the -dev or -devel package, so include that advice in the error message. * `./configure --with-stlport-compiler' now requires a compiler name as an argument. * configure: Disable probes for f77, gcj, and rc completely by preventing the probe code from even appearing in configure - this reduces the size of configure by 209KB (~25%) and should speed it up significantly. * configure: Suppress more unhelpful warnings and "remarks" for HP's aCC, and turn on "+wlint", which seems useful. * A number of cases of unnecessary header inclusions have been addressed, which should speed up compilation (fewer headers to parse when compiling many source files). This also reduces dependencies within the source code, and thus the number of files which need to be rebuilt when a header is changed. * configure: Cache the results of some of our custom tests. documentation: * The documentation has all been updated for changes in Xapian 1.0.0. * Many of the documentation comments in the API headers (which are collated using doxygen to generated the API reference) have been improved, and some missing ones added. Also, internal classes, members, and methods are now all marked as such so that none should appear in the generated documentation. In particular, the class inheritance graphs should be a lot clearer. A few other problems have also been addressed. * docs/internals.html: New separate index page for the "internal" documentation. * docs/deprecated.html: New document describing deprecation policy. This includes lists of features which have been removed, or which are deprecated and scheduled for removal, along with suggested replacements. * docs/admin_notes.html: New document introducing Xapian for sysadmins. * docs/termgenerator.html: New document describing the new term generation strategy implemented by the Term::Generator class. * docs/bm25.html,docs/intro_ir.html: These have been overhauled to make them fit better with the rest of the documentation, and with Xapian itself. * docs/overview.html: Fixed links to error classes in generated API documentation. * HACKING,INSTALL: Many updates and improvements. * xapian-config: Improve --version output so that help2man produces a better man page. * PLATFORMS: Remove reports for 0.7.* and demote reports for 0.8.* to "older reports" status. All SF compilefarm machines are now "no longer available", so update the symbols and key to reflect this. Update with recent success reports from the tinderbox and other sources. * AUTHORS: Thanks several bug reporters I missed before, as well as recent contributors. * docs/code_structure.html now looks nicer and includes links to svn.xapian.org. * docs/remote_protocol.html: Fixed several typos and other errors, and document all the new messages. * We no longer include docs/apidoc/latex/* in the xapian-core tarballs since it's just useless bloat. examples: * delve: + Report the exception error string if open a database fails. + Rename "-k" to "-V" since "keys" were renamed to "values" long ago. Keep "-k" as an alias for now, but don't advertise it. Add handling so "-V3" shows value #3 for every document in the database. + No longer stems terms by default. Add "-s/--stemmer" option to allow a stemmer to be specified. * quest: Add "--stemmer" option to allow stemming language to be set, or stemming to be disabled. portability: * Fix compilation with GCC 4.3 snapshot. * Always use pid_t not int for holding a process id, and use AC_TYPE_PID_T to `#define pid_t int' if <sys/types.h> doesn't provide pid_t. * Pass the 4th parameter of setsockopt() as char* which works whether the function actually takes char* or void* (since C++ allows implicit conversion from char* to void*). * Most warnings in the MSVC build have been fixed. * Refactored most portability workarounds into safeXXXX.h headers. * Building for mingw in a cygwin environment should work better now. packaging: * RPM spec file: + Updated for the changes in this release. + ChangeLog.examples is now packaged. debug code: * Rename --enable-debug* configure options - conflating the options to "turn on assertions" and "turn on logging" is confusing. `--enable-debug[=partial]' becomes `--enable-assertions'; `--enable-debug-verbose' becomes `--enable-log' and `--enable-debug=full' becomes `--enable-assertions --enable-log'. For now the old options give an error telling you the new equivalent. * Debug logging from expand is now all of type EXPAND (some was of types MATCHER and WTCALC before). * Hook the debug tracing in the lemon generated parser into Xapian's debug logging framework. * New assertion types: AssertEqParanoid() and AssertNeParanoid(). * Retry write() if it fails when writing a debug log entry to ensure to avoid the risk of a partial write. Xapian-core 0.9.10 (2007-03-04): API: * Fix WritableDatabase::replace_document() not to lose positional information for a document if it is replaced with itself with unmodified postings. * QueryParser: Add entries to the "unstem" map for prefixed boolean filters (e.g. type:html). * Fix inconsistent ordering of documents between pages with Enquire::set_sort_by_value_then_relevance (fixes bug#110). testsuite: * Workaround apparent bug in MSVC's ifstream class. flint and quartz backends: * Fix possible double-free after a transaction fails. * Fix code for recovering from failing to open a table for reading mid-modification. If modifications are so frequent that opening for reading fails 100 times in a row, throw DatabaseModifiedError not DatabaseOpeningError. * Don't call std::string::append(ptr, 0) when ptr may be uninitialised or NULL (rather suspect, and reported to cause SEGV-like behaviour with MSVC). * Ensure both_bases is set to false if we don't have both bases when opening a table using an existing object. * Use MS Windows API calls to delete files and open files we might want to delete while they are still open (i.e. the flint and quartz btree base files). This fixes a problem when a writer can't discard an old revision at the exact moment a reader is opening it (bug #108). remote backend: * Fix WritableDatabase::has_positions() to refetch the cached value if it might be out of date. * Fix incorrect serialisation of a query with non-default termpositions. inmemory backend: * If replace_document is used to set the docid of a newly added document which has previously existed, ensure we mark that document as valid. documentation: * Assorted improvements to API documentation. * docs/Makefile.am: The larger pool_size we set in 0.9.9 for building sourcedoc.pdf was a bit marginal, so increase it further. * docs/stemming.html,docs/install.html: Correct 2 references to "CVS" to say "SVN" instead. * HACKING: Update the release checklist. portability: * Fix flint and quartz to allow 2GB+ B-tree tables when compiling with MSVC. packaging: * RPMs: Remove "." from end of "Summary:". Package the new man page for xapian-progsrv. Xapian-core 0.9.9 (2006-11-09): testsuite: * Use popen() to run xapian-tcpsrv and wait for "Listening..." before returning rather than just sleeping for 1 second and hoping that's enough. * If we can't start xapian-tcpsrv because the port is in use, try higher numbered ports. remote backend: * xapian-tcpsrv: If the port requested is in use, exit with code 69 (EX_UNAVAILABLE) which is useful if you're trying to automate launching of xapian-tcpsrv instances. * xapian-tcpsrv: Output "Listening..." once the socket is open and read for connections (this allows the testsuite to wait until xapian-tcpsrv is ready before connecting to it). * xapian-progsrv: Now supports --help, --version, and has a man page. Fixes Bug #98. * Turn on TCP_NODELAY for the TCP variant of the remote backend which dramatically improves the latency of operations on the database. build system: * internaltest: Disable serialiselength1 and serialisedoc1 when the remote backend is disabled to fix build error in this case. * Move libbtreecheck.la from testsuite/ to backends/quartz/. * Move the testsuite harness from testsuite/ to tests/harness/. documentation: * Ship our custom INSTALL file rather than the generic one from autoconf which we've accidentally been shipping instead since 0.9.5. * docs/Makefile.am: Building sourcedoc.pdf needs a larger pool_size now we're using pdflatex. * HACKING: Update debian packaging checklist. * PLATFORMS: Updated with results from tinderbox. portability: * Create "safefcntl.h" as a replacement for <fcntl.h> instead of using "utils.h" for this purpose, since "utils.h" pulls in many other things we often don't need. packaging: * RPMs: Prevent binaries getting an rpath for /usr/lib64 on FC6. Xapian-core 0.9.8 (2006-11-02): API: * QueryParser: Don't require a prefixed boolean term to start with an alphanumeric - allow the same set of characters as we do for the second and subsequent characters. flint backend: * Only force a flush on WritableDatabase::allterms_begin() if there are actually pending changes. quartz backend: * Only force a flush on WritableDatabase::allterms_begin() if there are actually pending changes. * quartzcheck: Avoid dying because of an unhandled exception if the Btree checking code finds an error in the low-level Btree structure. Add a catch for any other unknown exceptions. build system: * When building with GCC, turn on warning flag -Wshadow even when not in maintainer mode (provided it is supported by the GCC version being used). * testsuite/backendmanager.cc: Fix compilation when valgrind is detected by configure. * If generating apidoc.pdf fails, display the logfile pdflatex generates since that is likely to show what failed. documentation: * Produce a PDF for apidoc rather than PostScript, since the PDF is smaller, plus at least as easy to print and easier to view for most users. Use pdflatex to generate the PDF directly rather than going via a DVI file which apparently produces a better result and also avoids problems on some Linux distros where latex is a symlink to pdfelatex (bug#81, bug#95). * HACKING: Mention automake 1.10 is out but we've not tested it yet. * HACKING: Add entries to release checklist: make sure new API methods are wrapped by the bindings, and that bug submitters are thanked. * HACKING: Note that on Debian, tetex-extra is needed for fancyhdr.sty. * HACKING: Note that dch can be used to update debian/changelog. * docs/code_structure.html: Document backends/remote. * PLATFORMS: Update from tinderbox. portability: * configure: When checking if we need -lm, don't use a constant argument to log() as the compiler might simply evaluate the whole expression at compile time. * configure: Redhat's GCC 2.96 doesn't support -Wundef even though real GCC version before and after it do! * configure: Avoid use of double quotes in double-quoted backticks since it causes problems on some platforms. * backends/flint/flint_io.cc: Fix compilation on windows (needs to #include "safewindows.h" to get definition of SSIZE_T). * Fix our implementation of om_ostringstream to compile so that the build works once more on older compilers without <sstream> (regression probably introduced in 0.9.7). packaging: * xapian.spec: Package xapian-progsrv. Xapian-core 0.9.7 (2006-10-10): API: * QueryParser: + Allow a distance to be optionally specified for NEAR - e.g. "cats NEAR/3 dogs" (bug#92). + Implement "ADJ" operator - like "NEAR" except the terms must appear in matching documents in the same order as in the query. + Fix bug in how we handle prefixed quoted phrases and prefixed brackets. + Fix parsing of loved and hated prefixed phrases and bracketted expressions. + Fix handling of stopwords in boolean expressions. + Don't ignore a stopword if it's the only query term. * Document::add_value() failed to replace an existing value with the same number, contrary to what the documentation says (bug #82). * Enquire::set_sort_by_value(): Don't fetch the document data when fetching the value to sort on. Simple benchmarking showed this to speed up sort by value by a factor of between 3 and 9! * Implement transactions for flint and quartz. Also supported are "unflushed" transactions, which provided an efficient way to atomically group a number of database modifications. * The Xapian::Error and Xapian::ErrorHandler classes have been reimplemented. The new versions have better, clearer documentation comments and are cleaner internally. * Change how doubles are serialised by TradWeight, BM25Weight, and in the remote backend protocol. The new encoding allows us to transfer any double value which can be represented by both machines precisely and compactly. testsuite: * Add targets "check-flint", "check-quartz", and "check-remote" in tests and at the top level which run the subset of tests which test the respective backend. * apitest: Run tests on flint if flint is enabled, rather than if quartz is enabled! * apitest: Speed up deldoc4 when run in verbose mode - some stringstream implementations are very inefficient when the string grows long. * Turn on GLIBCXX_FORCE_NEW when running tests under valgrind to stop the GNU C++ STL from using a pooling allocator. This helps make velgrind's leak tracking more reliable. * Probe for required valgrind logging options at configure time rather than when running the test program. This saves about 2 seconds per test program invocation. * Fix testsuite harness to show valgrind output when a test fails (when running under valgrind in verbose mode). This had stopped working, probably due to changes in valgrind 3. * internaltest: Check that the the destructor on a temporary object gets called at the correct time (Sun C++ deliberately gets this wrong by default, and it would be good to catch any other compilers which do the same). * apitest: When running tests on the remote backend and running under valgrind, run xapian-tcpsrv and xapian-progsrv under valgrind too to avoid issues with the precision of doubles (bug#94). flint backend: * Retry on EINTR from fcntl or waitpid when creating or releasing the flint lock file. * xapian-compact: Add --blocksize option to allow the blocksize to be set (default is 8K as before.) * WritableDatabase::replace_document(did, doc) was double-incrementing the "changes" counter when document did didn't exist so it would flush twice as often - fixed. * WritableDatabase::postlist_begin(): Remove forced flush when iterating the posting list of a term which has modified postings pending. quartz backend: * quartzcompact: Add --blocksize option to allow the blocksize to be set (default is 8K as before.) * WritableDatabase::replace_document(did, doc) was double-incrementing the "changes" counter when document did didn't exist so it would flush twice as often - fixed. remote backend: * Most of the remote backend has been rewritten. It now supports most operations which a local database does (including writing!), the protocol used is more compact, and a number of layers of classes have been eliminated and the sequences of method calls simplified, so the code should be easier to understand and maintain despite doing more. A number of bugs have been fixed in the process. * xapian-tcpsrv: Report errno if we catch a Xapian::Error which has it set. * xapian-tcpsrv: Fix memory leak in query unserialisation. build system: * Now using autoconf 2.60 for snapshots and releases. Also now using a libtool patch which improves support for Sun C++'s -library=stlport4 option. * configure: Fix generation of version.h to work with Solaris sed. * automake adds suitable rules for rebuilding doxygen_api_conf and doxygen_source_conf, so remove our less accurate versions. Also fix dependencies for regenerating the doxygen documentation, and make the documentation build work with parallel make. * Make use of the dist_ prefix to avoid having to list files in EXTRA_DIST as well as in *_DATA and man_MANS. * Removed a few unused #include-s. * include/xapian/error.h: Add hook to allow SWIG bindings to be built using GCC's visibility support. * configure: Turn on automake's -Wportability to help ensure our Makefile.am's are written in a portable way. * configure: Disable probing and short-cut tests for a FORTRAN compiler. We don't use one, but current libtool versions always check for it regardless. * xapian-config: Prune -L/usr/lib from output of `xapian-config --libs'. documentation: * docs/scalability.html: quartzcompact and xapian-compact now allow you to set the blocksize, so there's no need to use copydatabase if you want to migrate a database to a larger blocksize. Mention gmane. Other minor tweaks. * Eliminate "XAPIAN_DEPRECATED" from generated documentation. * PLATFORMS: Added success report for Nexenta (alpha 5), MSVC, and sparc linux. Updated other results from tinderbox. * Add links to the wiki from README and the documentation index. * docs/overview.html: Add discussion of uses of terms vs values. * docs/overview.html: Rewrite the section on Xapian::Document to remove some very out-of-date information and make it clearer. * include/xapian/database.h: Note that automatically allocated document IDs don't reuse IDs from deleted documents. * include/xapian/enquire.h: Note that "set_sort_by_relevance" is the default setting. * docs/queryparser.html,include/xapian/queryparser.h: Add note that FLAG_WILDCARD requires you to call set_database. * HACKING: Add some advice regarding debugging using -D_GLIBCXX_DEBUG, valgrind, and gdb. * HACKING: Give URL to Alexandre Duret-Lutz's autotools tutorial, which is much more up-to-date than the "goat book". * HACKING: Update and expand the information about the debian packaging. * Add missing dir_contents files. portability: * xapian/version.h: Add a check that _GLIBCXX_DEBUG is set compatibly if we're compiling with GNU C++ 3.4 or newer. * Add configure check to see if "-lm" is needed to get maths functions since newer versions of Sun's C++ compiler seem to require this. * Automatically put Sun's C++ compiler into "ANSI C++ compliant library" mode (using -library=stlport4). This allows us to remove most of the special case bits of code we've accumulated for just this compiler, which improves maintainability. * Sun's C++ compiler implements non-standards-conforming lifetimes for temporary objects by default. This means database locks don't get released when they should, so we now always pass "-features=tmplife" for Sun C++ which selects the behaviour specified by the C++ standard. Xapian-core 0.9.6 (2006-05-15): API: * Rename Xapian::xapian_version_string() and companions to Xapian::version_string(), etc. Keep the old functions as aliases which are marked as deprecated. * QueryParser: Add rules to handle a boolean filter with a "+" in front (such as +site:xapian.org). testsuite: * queryparsertest: Add another prefix testcase to improve coverage. build system: * configure: Simpler check for VALGRIND being set to empty value. * include/Makefile.am: Add xapian/version.h.timestamp as a dependency on all-local so that xapian/version.h actually gets regenerated when required. * Eliminate XAPIAN_BUILD_BACKEND_* from config.h and just use XAPIAN_HAS_*_BACKEND from xapian/version.h instead. documentation: * remote_protocol.html: Document keep-alive messages. * xapian/enquire.h: Remove bogus documentation for a parameter which doesn't exist. * PLATFORMS: Added a summary. Updated and pruned old entries for which we have a newer close match. * HACKING: Expand on details of what's required when changing Xapian (discuss documentation requirements, and more on why feature tests are vital). * HACKING: Update section on building debian packages. portability: * The tarball is generated with a patched version of libtool 1.5.22 which fixes libtool bugs on HP-UX and some BSD platforms. * configure: Fix problems with test for snprintf which affected cygwin, and possibly some other platforms. * configure: Tweak version.h generation to cope with CXXCPP putting carriage returns into its output as can happen on cygwin. * Fix renaming of "iamflint.tmp" for MS Windows where you can't rename an open file. * Fixed MSVC7 warnings. * Added workaround for newlib header bug. Xapian-core 0.9.5 (2006-04-08): API: * QueryParser: + Fix FLAG_BOOLEAN_ANY_CASE to really allow any case combination - previously it only allowed all uppercase or all lowercase. + Fix QueryParser's handling of terms with trailing "#", "+", or "-" when set_database has been called and the term doesn't exist in the database with the suffix. * Add mechanism to allow xapian-bindings to override deprecation warnings so we can continue to wrap deprecated methods without lots of warnings. * Move Enquire::get_matching_terms_end() and Document::termlist_end() inline in header. * Database::termlist_begin(): Eliminate the MultiTermList wrapper in the common case where we're only dealing with a single database. * Fix TermIterator::positionlist_begin() to work on TermIterator from Database::termlist_begin(). Make TermList::positionlist_begin() pure virtual and put dummy implementations in BranchTermList and other subclasses which can't (or don't) implement it. This makes it hard to accidentally fail to implement it in a backend's TermList subclass. * TermIterator::positionlist_begin() with the remote backend now throws UnimplementedError instead of InvalidOperationError. * Implement Enquire::set_sort_by_relevance_then_value(). testsuite: * Added missing feature test for QueryParser::FLAG_BOOLEAN_ANY_CASE. * remotetest: Check mset size in tcpmatch1. flint backend: * xapian-compact: Fixed segfault from passing an unknown option (e.g. "xapian-compact --foo"). quartz backend: * quartzdump,quartzcompact: Fixed segfault from passing an unknown option (e.g. "quartzdump --foo"). remote backend: * xapian-tcpsrv: Don't perform a name lookup on the IP address which an incoming connection is from as that could easily slow down the search response - instead just print the IP address itself if output is verbose. * xapian-tcpsrv: Allow up to 5 connections in the listen queue instead of just one. build system: * Removed unused code from the matcher and the remote, quartz, and flint backends. documentation: * All installed binaries now support --help and --version and have a man page (which is generated using help2man). * docs/overview.html: Bring up to date. * docs/remote_protocol.html: Document messages for requesting and sending a termlist and a document. * PLATFORMS, AUTHORS: Updated. * INSTALL: Improve wording. * HACKING: Note that we now use a lightly patched version of libtool 1.5.22. * HACKING: aclocal is part of automake, not autoconf. portability: * Added some tweaks to help support compilation with MSVC. packaging: * RPMs: package the new man pages. debug code: * Add missing spaces in some debug output. Xapian-core 0.9.4 (2006-02-21): API: * Flag deprecated methods such that the compiler gives a warning, for compilers which support such a feature (most notably GCC >= 3.1). * Correct typo in name of definition of function xapian_revision(). testsuite: * Updated uses of deprecated methods in the testsuite. build system: * xapian-config: Set exec_prefix and prefix at top of script so that xapian-config works after xapian-core is installed. documentation: * Add documentation comment for Enquire::set_sort_by_value_then_relevance(). * README: Add pointer to HACKING. Change "CVS access" to "SVN access". * PLATFORMS: Updated from tinderbox. * COPYING: Update second occurrence of old FSF address. Xapian-core 0.9.3 (2006-02-16): API: * Added 4 functions to report version information for the library version being used (which may not be the same as that compiled against if shared libraries are in use): xapian_version_string(), xapian_major_version(), xapian_minor_version(), xapian_revision(). * Xapian::QueryParser: + Fix handling of "+" terms in a query when the default query operator is AND. Added regression test for this. + Added "AND NOT" as a synonym for "NOT". Added feature tests for this. * Fix prototype for ESet::operator[] to take parameter of type termcount instead of doccount (doccount and termcount are both typedefs to the same type so this really just makes the prototype more consistent). * Xapian::Stem: Check for malloc and calloc failing to allocate memory and throw an exception. Richard has fixed this upstream in snowball, so this is a temporary fix until we import a new version of snowball. * Xapian::Database: Trying to open a database for reading which doesn't exist now fails with DatabaseOpeningError instead of FeatureUnavailableError. Added regression test for this. * Add Stopper::get_description() and SimpleStopper::get_description(). testsuite: * Fixed testsuite harness to work with valgrind on 64 bit platforms. * Merged the "running tests" section of docs/tests.html into the similar section in HACKING, and make docs/tests.html refer the reader to HACKING for more information. * Tidied and enhanced environmental variables which the test suite harness recongnises: + OM_TEST_BACKEND: Removed support since the "-b" switch to apitest allows you control which backend is used, making OM_TEST_BACKEND pretty much redundant. + XAPIAN_SIG_DFL: Renamed to XAPIAN_TESTSUITE_SIG_DFL. + XAPIAN_TESTSUITE_OUTPUT: New environmental variable to control use of ANSI colour escape sequences in test output (set to "plain" to disable them, unset, empty, or "auto" to check if stdout is a tty, or anything else to force colour). flint backend: * xapian-compact: Added "--multipass" option to merge postlists in pairs or triples until all are merged. Generally this is faster than an N-way merge, but it does require more disk space for temporary files so it's not the default. quartz backend: * quartzcheck: If the database is too broken to open, emit a warning message and bump the error count. build system: * Now generate snapshots and releases with automake 1.9.6 (was 1.9.5) and libtool 1.5.22 (was 1.5.18). * configure: If not cross-compiling, try to actually run a test program built with the C++ compiler, not just link one. * configure: Fix to actually skip the check for valgrind if VALGRIND is set to an empty value. * configure: Add sanity check for MS Windows that "find" is Unix-like find, not MSDOS-like. * Fix conditional compilation of flint backend - it was being disabled when quartz was, not when flint was supposed to be. documentation: * INSTALL,README: Updated. * Give pointer to replacements for the deprecated Enquire sorting methods in the doxygen collated documentation. * PLATFORMS: Added success reports for ppc64 linux and Fedora Core 4. Updated from the tinderbox. * HACKING: Note platforms valgrind now has solid support for; Improve phrasing in a few places. * Upgrade to using doxygen 1.4.6 for generating API documentation. * Change title of the "full source" documentation to "Internal Source Documentation" rather than "Full source documentation" to make it clearer it's only useful if you want to modify Xapian itself. * Fix documentation comments for the values of QueryParser::feature_flag so doxygen actually pulls out the documentation for them. Add documentation for the parameters of QueryParser::parse_query(). * queryparser.html: Document wildcards. portability: * Fix compilation with GCC 4.0.1 and later (need to forward declare class InMemoryDatabase) (bug #69). * Fix compilation under cygwin (broken in 0.9.2). * Don't pass NULL for the second parameter of execl() - the Linux man page says execl takes "one or more pointers to null-terminated strings". Also cast the NULL to (void*) to avoid "missing sentinel" warning from GCC4. * Use snprintf instead of sprintf where available (we were attempting to do this in some places before, but the configure test was broken so sprintf was always being used). * Enable more warnings under aCC and fix minor issues highlighted. Suppress "Entire translation unit was empty" warning which isn't useful to us. * Write top-bit set characters in the source using \xXX notation to avoid warnings from Intel's C++ compiler. * configure: TYPE_SOCKLEN_T fails hard, so only run it if we've successfully run other socket tests. * queryparser/accentnormalisingitor.h: #include <limits.h> for CHAR_BIT. * bin/xapian-compact.cc: Fix printf type mismatch on 64 bit platforms. * Replace pair<bool, string> with a simple class BoolAndString - the pair results in a 4328 byte symbol on HP-UX which gets truncated (to 4000 bytes). Most likely this is harmless, but it causes a warning. * configure: Disable flint backend by default if building for djgpp or msdos. * xapian-config: Previously when linking without libtool we've always thrown in dependency_libs, even though only some platforms need it (because it's generally pretty harmless). However some Linux distros have an unhelpful policy of not packaging .la files, so libxapian.la isn't available to extract dependency_libs from. Linux is a platform which doesn't require dependency_libs to be explicitly linked, so extend xapian-config to not pull in dependency_libs if libtool's link_all_deplibs_CXX=no. * xapian-config: If the current platform needs dependency_libs and libxapian.la's dependency_libs contains another .la file, transform it into a pair of -L and -l options, and recursively expand its dependency_libs (if any). * Don't pass functions with C++ linkage to places wanting pointers to functions with C linkage. So far this has worked for us, but it causes warnings with some compilers, and may not be portable. * Compaq C++ 7.1 doesn't suffer from the problem which previously prevented it from building Xapian. This release includes workarounds for some oddities with errno.h support in this compiler, but currently the build fails when trying to link a binary with the library. packaging: * RPM: Invoke %setup correctly in xapian.spec. debug code: * Add missing '#include <iostream>' when TIMING_PATCH is defined. Xapian-core 0.9.2 (2005-07-15): API: * QueryParser: + Added optional "flags" argument to parse_query method. + Add flag FLAG_BOOLEAN_ANY_CASE which tells the QueryParser that boolean operators such as "AND", "OR", and "NEAR" should be recognised even if they aren't fully capitalised (so "and", "And", "aNd", etc will work too). + Add flag FLAG_WILDCARD which tells the QueryParser to allow right truncation e.g. "xap*". + Fixed to handle "-site:microsoft.com" where site is a boolean prefix. Added testcases for this. testsuite: * The test harness was incorrectly creating a quartz database when a flint one was requested, which meant tests weren't being run against flint and so it had bugs rendering it pretty much unusable. * Added regression test longpositionlist1 (to check encoding/decoding a long position list, which flint had problems with). flint backend: * Bumped format version number. * Added new "xapian-compact" program which can compact and merge flint databases in a similar way to how quartzcompact does for quartz databases. * Fixed to auto-detect database type when opening an existing Flint database as a WritableDatabase. * The code to encode the position list size, first entry, and last entry didn't match the code to decode them! Reworked both to match, using a slightly more compact encoding. * We were failing to append "DB" to the path when opening a table for reading. * Rewrite of FlintAllTermsList with several fewer member variables. The rewrite fixes a bug too - the old version wasn't ignoring the metainfo entry which is now in the postlist table. * It seems we need to explicitly kill the child process used for locking. Otherwise when we have two databases locked just closing the connection doesn't cause the child to die. I don't understand why it's needed, but this fix is at least clean. quartz backend: * quartzcompact: Fix mis-repacking of keys in positionlist table when merging several databases. * Disable assertion in allterms iteration which is incorrect in a corner case. This is only a problem if a termname contains zero bytes and you're using a debug build. Add regression test test_specialterms2. remote backend: * Implement sorting on a value with the remote backend. build system: * Pass automake options to AM_INIT_AUTOMAKE rather than specifying them in Makefile.am. This way, the version requirements for autoconf and automake are stated close together. * configure: -Wshadow causes false positives with GCC 3.0.4, so only enable it for 3.1 and up. * configure: Eliminate use of "ln -s" when generating include/xapian/version.h since it seems to cause problems on Solaris in some setups and isn't really necessary. * Add dependency mechanism so version.h gets regenerated when the template is changed. * configure: Check for spaces in build directory, source directory, or install prefix and die with a helpful message. * Add dependency to generate queryparser_token.h. * Eliminated TOP_SRCDIR and TOP_BUILDDIR - it's better to just use top_srcdir and top_builddir directly. * configure: Generate the list of source files to feed to doxygen by inspecting all the Makefile.am files prior to running autoreconf rather than by using "find" when the user runs ./configure. This speeds up configure, avoids generating docs for random .cc and .h files which aren't part of xapian-core, and avoids problems with picking up FIND.EXE on MS Windows. documentation: * Expanded explanation of the "descending docid with boolean weighting" trick for fast date ordered searching in Enquire::set_docid_order() API docs. * docs/intro_ir.html: Citeseer has moved, so update link. * testsuite/testsuite.cc: Update URL for valgrind FAQ in comment. * COPYING: Update FSF address. * HACKING: Minor updates to release checklist. portability: * Assorted tweaks towards allowing compilation with MSVC. packaging: * xapian.spec.in: Package xapian-compact. Xapian-core 0.9.1 (2005-06-06): API: * Fix SEGV on get_terms_begin() on an empty Query object. This was causing a SEGV in Omega with an empty query. * Put Query::get_terms_end() inline in header. flint backend: * Added the new "flint" backend, which starts out as a copy of the quartz backend plus some modifications and replacements. When creating a database without a specified backend, quartz is still used unless the environmental variable XAPIAN_PREFER_FLINT is set to a non-empty value. * apitest now runs tests on flint as well as the other backends. * Removed undocumented (and hence the little used) quartz "log" feature. * Implement new fork+fcntl+exec based locking (for Unix) and CreateFile based locking (for Windows - currently untested). * Move the special key/tag pair holding the total document length and doc id high water mark from the record table to the postlist table. This means that when appending documents, the insertion point will now always be at the end of the record table which is more efficient. We need to jump around the postlist table to merge postings in anyway. * Changed metafile magic to be different from quartz, and make the metafile version a datestamp which we'll change each time the format changes. * Check the return value of close() when writing the metafile. * Flint position list table now stores entries using interpolative coding (which is significantly more compact). quartz backend: * quartzcheck: Fixed corner case where you couldn't check a single Btree table which was just the DB and baseA/baseB files in a directory (Xapian doesn't produce anything like this, but btreetest does while unit testing the Btree code). build system: * Releases are now created using libtool 1.5.18 and automake 1.9.5. * configure: Pass more -W flags to g++ (including -Wundef which caught the getopt problem fixed in this release). Fixed new GCC warnings from these new flags. * Fixed a lingering DOXYGEN_HAVE_DOT reference. * Fixed accidentally pruned #define which meant that getopt code was being included even on systems which use glibc (on such systems, we should use the glibc copy of the code instead). * queryparser/queryparser.lemony: Add missing '#include <config.h>'. documentation: * Added missing documentation comments for a QueryParser methods added in 0.9.0. * docs/quartzdesign.html: Removed warning that quartz is still in development. * PLATFORMS: Updated from tinderbox. * configure: Describe CC_FOR_BUILD in configure --help output. * HACKING: Updated release instructions to refer to SVN, and note that release tarballs are now built specially rather than being copies of snapshots. Update information about the SVN tag name to use for debian files. * HACKING: Add "email Fabrice" to the release checklist so that RPM spec files don't lag behind. * Fixed a few spelling mistakes. packaging: * xapian.spec: Remove bogus %setup line left over from when we packaged xapian-core and xapian-examples together from separate tarballs. debug code: * api/omqueryinternal.cc: Fixed compilation with --enable-debug. * common/omdebug.h: Replace C style cast with static_cast<> which reveals that we were discarding const (harmlessly though). Xapian-core 0.9.0 (2005-05-13): API: * Query objects really need to be immutable after construction (otherwise we need a copy-on-write mechanism). To achieve this the following API changes were required: + Remove Query::set_length() in favour of an optional length parameter to Enquire::set_query(). + Eliminated Query::set_elite_set_size() in favour of optional parameter to constructor. + Eliminated Query::set_window() in favour of an optional parameter to the constructor. * Removed OP_WEIGHT_CUTOFF, since it doesn't actually seem to add useful functionality over using Enquire::set_cutoff(). * MSet::max_size() (which only exists so that MSet is an STL container) now returns MSet::size() and is inlined from the header. * Added ESet::max_size() (for STL compatibility). * Fixed Xapian::RSet to have the same "it's a handle" copy semantics as most of the other classes. * Rewritten QueryParser class: + Uses Lemon instead of Bison to generate the parser, which enables us to stop using static data, so this class is at last reentrant. + QueryParser now uses a PIMPL style with reference counted internals like most of the other Xapian classes. + Direct access to member variables has gone, which unfortunately forces an API change (but this fixes bug #39). Instead of accessing QueryParser::termlist member variable, iterate over terms using Query::get_terms_begin() and get_terms_end() on the returned Query object. Direct access to stoplist is replaced by QueryParser::get_stoplist_begin() and get_stoplist_end(); and to unstem by get_unstem_begin() and get_unstem_end(). + The rewrite parses many real world examples better than the old version. + Now allow searches for C#, etc. If a database has been set, for this and + and - suffixes, check if the term actually exists, and if not, ignore the suffix if the unsuffixed term exists. + Added QueryParser::get_description() method (not very descriptive yet!) + Added backward compatibility wrapper for old version of QueryParser::set_stemming_options(). + xapian.h now automatically includes xapian/queryparser.h. Directly including xapian/queryparser.h will continue to work for now, but is deprecated. + QueryParser::parse_query() was failing to clear termlist and unstem - the rewrite fixes this. + New QueryParser parses "term prefix:(term2 term3)" correctly. * Added Xapian::SimpleStopper which just stops terms specified by a pair of iterators. This should be sufficient for the majority of uses. * Tidied up the Enquire sorting API and added ability to reverse sort on a value. Removed sort_bands support. * Enquire::get_description() improved. * Methods which return an end iterator where the internals are just NULL are now inline in the header for efficiency. Should we ever need to change an implementation, we can easily move methods back into the library and bump the library version suitably. * Added Stem::operator() as preferred alternative to Stem::stem_word(). * Simplified Stem internal design by restructuring to eliminate a few internal methods. * BM25Weight: Avoid fetching document length if we're simply going to multiply it by zero! testsuite: * Fixed TEST_EQUAL_DOUBLE to use DBL_EPSILON correctly. * Rewrite of index_utils test harness code, removing unused and unusual features. Data files for tests are now easier to write. These changes also fix the bug that ^x didn't actually decode hex values correctly. * tests/testdata/etext.txt: Stripped carriage returns. * apitest: Extended stemlang1 to check that trying to create a stemmer for a non-existent language throws InvalidArgumentError. * queryparsertest: + Moved into tests/ subdirectory. + Reworked to use the standard testsuite harness. + Added tests for new features in the rewritten QueryParser. quartz backend: * quartzcheck: Now checks the structure of all the tables, not just the postlist table, and cross-checks doclen values between termlist and postlist tables. Recognises "--help" option. Should now continue after an error (typically it would crash before), and counts the number of errors found. Now exits with non-zero status if any errors were found. More readable output. * quartzcompact: Extended to allow merging several quartz databases to produce a single compact quartz database. This allows for faster building - simple index in chunks, then merge the chunks. * quartzcompact: Made full compaction a tiny bit more compact. * quartzcompact: Added "fuller compaction" mode, which ignores the usual "at least 4 items per block" rule. This achieves slightly tighter compaction, though it's probably not advisable to use this option if you plan to update the compacted database. * Improved compaction by a few % in non-full case. Tighter bound on amount of memory to reserve to read the tag into. * Fix skip_to on an allterms TermIterator to set the current term when the skip_to-ed term is in the database. Add regression test for this (allterms5). * Values are stored in sorted order so we can stop unpacking the list once we get to one after the one we're looking for (in the case where the one we're looking for doesn't exist). build system: * configure: Check that the C++ compiler can actually link a program. AC_LANG_CXX doesn't, and if it can't find a C++ compiler it'll just return "g++" which just leads to a later configure test failing in a confusing way. * configure: corrected configure output of "none known for yes" or "none known for no" to "none known for g++-3.2" or similar. * include/xapian/version.h: Define XAPIAN_HAS_xxx_BACKEND for each backend which is enabled. The bindings need this, and user code might find it useful too. * include/xapian/database.h: Don't declare the backend factory functions if the corresponding backend has been disabled. This means that trying to use a disabled backend will be caught at compile time rather than link time. * configure: Enhanced valgrind test to (a) see if --tool=memcheck is needed and (b) see if valgrind actually works (we don't want to try to use an x86 valgrind on an x86_64 box). * configure: Suppress 2 Intel C++ warnings which we can't easily code around, and enable -Werror automatically with --enable-maintainer-mode. * Clearer make rules for building Postscript doxygen docs. * Removed some no longer used code. * Moved a number of method definitions out of headers because they are virtual, or too large to be sensible candidates for inlining. * Eliminated the extra library for the queryparser - it's tiny compared to the main library and having it around just complicates things. * configure: We no longer need Bison, but we do need CC_FOR_BUILD to compile Lemon with. * Snapshot generator now appends _svn6789 or similar to the version string. Adjusted configure and XO_LIB_XAPIAN macro to take this into account. * configure: If any tools needed for documentation are missing and we're in maintainer mode, die with a suitable error in configure rather than with strange errors when building the documentation. * docs/Makefile.am: Explicitly set the pool_size for latex, because we now seem to overflow the default setting on some systems. * docs/Makefile.am: Use $(MAKE) instead of make. documentation: * Numerous improvements to documentation comments. Added documentation comments for QueryParser class. * HACKING: Added better description of how reference-counted API classes are structured. * HACKING: Note that '#include <limits>' isn't supported by GCC 2.95, and other assorted minor tweaks. * HACKING: Note how to disable use of VALGRIND on the make check command line, or when using runtest directly. * Updated all documentation mentions of CVS to talk about Subversion instead. * PLATFORMS: Updated from tinderbox and other sources. * PLATFORMS: Added minimal testcase which fails to compile with Compaq's C++ compiler (cxx). * INSTALL,README: Updated. * docs/queryparser.html: Note that + and - work on phrases and bracketed expressions. * docs/intro_ir.html: Corrected two errors. * docs/stemming.html: Stemming appears to be applicable to Japanese so don't say it isn't! examples: * Moved xapian-examples module to examples subdirectory of xapian-core. * quest: Added stopword handling. portability: * configure: autoconf identifies Intel's C++ compiler as GCC, so probe for which we actually have. * Xapian will now compile cleanly with Intel C++ 8.1 on ia64 Linux and on x86 Linux. * backends/quartz/btree.cc: Fixed GCC compilation warning. * tests/api_db.cc: Fixed warning from Sun's C++ compiler. * configure: Automatically enable ANSI C++ mode for SGI's compiler with '-LANG:std'; check that any automatically determined flags for ANSI C++ mode actually allow us to compile a trivial program - if they don't it probably means the compiler isn't the one we were expecting, but one installed with the same name, so we now drop the flags in this case. * The compile on IRIX with SGI compiler is now warning free, apart from two "unused variable" warnings in Snowball generated code. * On WIN32, don't define NOMINMAX if it is already defined. packaging: * xapian.spec: Don't say "%makeinstall" in a comment since rpm tries to expand it and explodes. * xapian.spec: '/usr/share' -> '%{_datadir}'. * xapian.spec: Put the .so in the -devel package (it's only useful for linking to - the .so.* files are all that's needed at runtime). debug code: * net/socketserver.cc: Fixed typo in debug code. Xapian-core 0.8.5 (2004-12-23): quartz backend: * quartzcompact: When full_compaction is enabled, don't fill the last few bytes of a block if that would mean we needed an extra item and the overhead for that item would use up more of the next block than we save. This reduces the table size after full compaction by up to 0.2% in my tests! * quartzcompact: Tables sizes will always be a whole number of Kbytes, since the blocksize is, so report the size in K. Also report the change in size as well as the before and after sizes. * quartzcompact: Added missing '#include <config.h>' so that largefile support is enabled when we call stat() and we report compression statistics for tables > 2G. * quartzcompact: Added --no-full / -n option to disable full compaction. This may be useful if you want to update the database after compacting it (need to test to see if this option is actually useful). * Renamed Btree::compress() to Btree::compact() for consistency with "full_compaction" and "quartzcompact". Also, "compress" is confusing since we use that term in the zlib patch. build system: * xapian-config: Fixed --libs output to not include libxapian.la. * Added missing '#include <config.h>' to various .cc files (the omissions were probably harmless, but config.h should be included as the first thing any source file does). documentation: * Minor updates. packaging: * RPM spec file: %makeinstall puts the wrong paths in the .la files so use "make DESTDIR=... install" instead. debug code: * Fixed to build with AssertParanoid enabled. Xapian-core 0.8.4 (2004-12-08): API: * Added constructors to Database and WritableDatabase which fulfil the role that the Auto::open() factory functions currently do. Auto::open() is now deprecated. * Removed the ability to write a Xapian object to an ostream directly, as it's little used and potentially dangerous ('cout << mset[i];' will compile, but you almost certainly meant 'cout << *mset[i];'). You can get the old effect by writing 'cout << obj->get_description();' instead of 'cout << obj;'. Note that including xapian.h no longer pulls in fstream, which code may have been implicitly relying on - if this is a problem add '#include <fstream>' after '#include <xapian.h>'. * QueryParser: Be smarter about when to add a ':' when adding a term prefix. * BoolWeight::unserialise() now returns BoolWeight*, and similarly for TradWeight and BM25Weight. BoolWeight::clone() now returns BoolWeight *. * If a database contains no positional information, change NEAR and PHRASE queries into AND queries (as otherwise they'd return no matches at all) (bug #56). Added feature test phraseorneartoand1. * Renamed BM25 parameters to match standard naming in papers and elsewhere (A->k3, B->k1, C->k2, D->b), eliminated the extra factor of 2 which our C had, and reordered the parameters to k1, k2, k3. This is an incompatible API change for BM25Weight(), so if you are using custom parameters for BM25 you'll need to update your code. * During query expansion, if we estimate the term frequency, ensure it has a sane value (>= r and <= N - R + r) rather than bodging around the problem later on. * TradWeight, BM25Weight: termfreq is always exact for matching (we only approximate it for query expansion) so replace code to work around bad approximations with Assert() to make sure this never happens. testsuite: * runtest: Enhanced to allow it to run test programs under valgrind and other tools (gdb was already supported). * runtest: now works with valgrind 2.1.2 and later (valgrind's --logfile-fd option was renamed to --log-fd). * runtest: Allow VALGRIND environmental variable to override the value we got from configure. * Added a dependency so "make check" regenerates runtest if necessary. * The test programs now point the user to the runtest script if srcdir can't be guessed. And they no longer look for the test program in the tests subdirectory of the current directory. * btreetest: Fixed memory leaks in test_cursor1 (the testcase itself was causing the leak, not the library). * apitest: Fixed mset_range_is_same() and mset_range_is_same_weights() helper functions which were only comparing the first item in the range. Thankfully the tests still all pass so this wasn't hiding any bugs. * apitest: A modified version of changequery1 fails - the bug is obscure and subtle, and the fix is tricky so set the modified test to SKIP for now. * apitest: Added test_weight1 which tests the built-in Xapian::Weight subclasses and test_userweight1 which tests user defined weighting schemes (bug#8). * quartztest: Test with DB_CREATE_OR_OPEN in writelock1. quartz backend: * An interrupted update could cause any further updates to fail with "New revision too low" because the new revision was being calculated incorrectly - fixed (bug#55). * Fixed Bcursor::del() which didn't always leave the cursor on the next item like it should. This may have been causing problems when trying to remove the last references to a particular term. * Fixed ultra-obscure bug in the code which finds a key suitable to discriminating between two blocks in a B-tree branch (discovered by reading the code). Comparing the keys didn't consider the length of the second, so it is possible the code would miscompare. But in reality this is extremely unlikely to happen, and even then would probably just mean that the discriminating key wouldn't be as short as it could be (wasting a few bytes but otherwise harmless). * If we're removing a posting list entirely, often there will only be one chunk, so avoid creating a Bcursor in this case. * Simplified Btree::compare_keys() by removing the last case which was dead code as it was covered by an earlier case. * Check that any user specified block size is a power of 2. If the block size passed is invalid, use the default of 8192 rather than throwing an exception. * Started to refactor the Btree manager by introducing Item and Key classes which take care of handling the on-disk format, and eliminated duplicated tag reading code in Btree and Bcursor. These changes will pave the way for improvements to the on disk format. * Applied the Quartz "DANGEROUS" patch, but disabled for now. This way it won't keep being broken by changes to the code. * quartzcompact: Added --help and --version; Check that the source path and desitination path aren't the same; Report each table name when we start compacting it, and some simple stats on the compaction achieved when we finish. muscat36 backend: * Removed a default parameter value from one variant of Xapian::Muscat36::open_db() so that there's only one candidate for open_db(string). build system: * xapian-config: If flags are needed to select ANSI mode with the current compiler, then make xapian-config --cxxflags include them so that Xapian users don't have to jump through the same hoops we do. * xapian-config: Added --swigflags option for use with SWIG. * XO_LIB_XAPIAN now passes ac_top_srcdir to xapian-config which uses it (if provided) to say "configure.ac" or "configure.in" rather than "configure.in (or configure.ac)" in the "Add AC_PROG_LIBTOOL" error message. * Cleaned up the build system in a few places. * Removed a few totally unneeded header includes. * Moved a number of functions and methods out of headers because they're not good inlining candidates (too big or virtual methods). * Changed C style casts to C++ style. The syntax is ugly, but they do make the intent clearer which is a good thing. Note this as a coding style guideline in HACKING. * configure.ac: Automatically add -Werror to CFLAGS and CXXFLAGS if maintainer mode is enabled and we're using GCC3 or newer. Don't do this for older GCCs as GCC 2.95 issues spurious warnings. * Reworked how include/xapian/version.h is generated so that it works better with compilers other than GCC, and with HP-UX sed. * XAPIAN_VERSION is now a string (e.g. "0.8.4"). * Added new #define XAPIAN_REVISION (which is 4 for version 0.8.4). documentation: * docs/bm25.html,docs/intro_ir.html: Reworked to talk about Xapian rather than Muscat. Also improved the appearance of the formulae. * HACKING: Valgrind now supports x86 FreeBSD and PowerPC Linux. * Documented parameters of Enquire::register_match_decider(). * We now use doxygen 1.3.8 to build documentation for snapshots and releases. * PLATFORMS: Updated from the tinderbox (which now runs builds on machines available in HP's testdrive scheme) and other assorted reports. * PLATFORMS: Removed reports from versions prior to 0.7.0. So much has changed that these are of little value. * docs/scalability.html: Added note warning about benchmarking from cold. * Assorted other minor documentation improvements. portability: * configure.ac: Improved snprintf configure test to actually check that it works (older implementations may have different semantics for the return value, and at least one ignores the length restriction entirely!) * Reworked the GNU getopt source we use so that the header is clean and suitable for use from a reasonably ISO-conforming C++ compiler instead of being full of cruft for working around quirky C compilers which C++ compilers tend to stumble over. * Use SOCKLEN_T for the type we need to pass to various socket calls, since HPUX defines socklen_t yet wants int in those calls. Reworked the TYPE_SOCKLEN_T test we use. * On Windows, we want winsock2.h instead of sys/socket.h. Mingw doesn't seem to even have the latter, so I think previously we've been compiling by picking one up from somewhere random! * Change the small number of C sources we have to be C++ so we can compile everything with the C++ compiler. This way we don't need to worry about configure choosing a mismatching pair of compilers, or about whether configure tests with the C compiler don't apply to the C++ compiler, or vice versa. * Compiles and passes testsuite with HP's aCC (we have to compile in ANSI mode, so we automatically add -AA to CXXFLAGS). * If the link test detects pread and pwrite are present, get configure to try out prototypes for pread and pwrite. This is much cleaner than trying to find the right combination of preprocessor defines to get each platform's system headers to provide prototypes. * configure: Disable probing for pread/pwrite on HP-UX as they're present but don't work when LFS (Large File Support) is enabled, and we definitely want LFS. * Fixed some warnings from Sun's C++ compiler. * Provide our own C_isalpha(), etc replacements for isalpha(), etc which always work in the C locale and avoid signed char problems. * For mingw/cygwin, pass -no-undefined when linking libxapianqueryparser.la so libtool builds a shared library. Also pass the magic linker flag -Wl,--enable-runtime-pseudo-reloc if configure has determined it is needed. * For cygwin, use the underlying MoveFile API call for locking, as link() doesn't work on FAT partitions. And don't rely on HAVE_LINK to control whether we use link() otherwise - if the configure test somehow misfires, a compilation error is better than using rename() on Unix as that would cause a second writer to smash the lock of the first. * Closer to building with Compaq C++ - add "-std strict_ansi" to CXXFLAGS, and tweaked the code in several places. It currently dies trying to compile the PIMPL smart pointer template code which looks hard to fix. debug code: * HACKING: Document that %% in XAPIAN_DEBUG_LOG is substituted with the process-id, and that setting XAPIAN_DEBUG_FLAGS to -1 enables all debug messages. * Removed compatibility code for checking environment variables OM_DEBUG_FILE and OM_DEBUG_TYPES. Xapian-core 0.8.3 (2004-09-20): API: * Fixed bug which caused a segmentation fault or odd "Document not found" exceptions when new check_at_least parameter to Enquire::get_mset() was used and there weren't many matches (regression test checkatleast1). remote backend: * Renamed omtcpsrv to xapian-tcpsrv and omprogsrv to xapian-progsrv. packaging: * RPM packaging now has a separate package for the runtime libraries to allow 32 and 64 bit versions to be installed concurrently. * RPM for xapian-core now includes binaries from xapian-examples. debug code: * Fixed to compile with debug tracing enabled. Xapian-core 0.8.2 (2004-09-13): API: * Removed the compatibility layer which allowed programs written against the pre-0.7.0 API to be compiled. * Added new ESet methods swap(), back() and operator[]. * Xapian::WritableDatabase::replace_document can now be used to add a document with a specific docid (to allow keeping docids in sync with numeric UIDs from another system). * Added Xapian::WritableDatabase::replace_document and delete_document variants which take a unique id term name rather than a document id. * Enquire::get_mset(): If a matchdecider is specified and no matches are requested, the lower bound on the number of matches must be 0 (since the matchdecider could reject all the matches). * Renamed Query::is_empty() to Query::empty() for consistency. Keep Query::is_empty() for now as a deprecated alias. * Enquire::set_sorting() now takes an optional third parameter which allows you to specify a sort by value, then relevance, then docid instead of by value then docid. * Enquire::get_mset() now takes an optional "check_at_least" parameter which allows Omega's MIN_HITS functionality to be implemented in the matcher (where it can be done a bit more efficiently). testsuite: * Reworked quartztest's positionlist1 into a generic api test as apitest's poslist3. * apitest: Reenabled allterms2, but with the iterator copying parts removed - TermIterator is an input_iterator so that part was invalid. * Overhauled btreetest and quartztest - tests at the Btree level are now all in btreetest. Those at the QuartzDatabase level are in quartztest. * Split api_db.cc into 3 files as it has grown rather large. * tests/runtest: Added support for easily running gdb on a test program, automatically sorting out srcdir and libtool. quartz backend: * Refactored the quartz backend code to reduce the number of layered classes and eliminate unnecessary buffering, reducing memory usage so that more posting list changes can be batched together (see next change) and database building can be done several times faster. * Added tunable flush threshold - set XAPIAN_FLUSH_THRESHOLD=50000 to flush every 50000 documents. The default is now every 10000 documents (was every 1000 documents previously). The optimum value will most likely depend on your data and hardware. * WritableDatabase::get_document() no longer forces pending changes to be flushed. The document will read things lazily from the database, and that reading may trigger a forced flush). * WritableDatabase::get_avlength() no longer forces pending changes to be flushed. This means you can now search a modified WritableDatabase without causing a flush unless the search includes a term whose postlist has pending modifications. * Reduced quartz postlist chunk threshold from "2048 or a few bytes more" to "2000 or a few bytes more" so that full size chunks won't get split by the Btree. * Improved the "Db block overwritten" message. The DatabaseCorruptError version now suggests multiple writers may be the cause, while the DatabaseModifiedError version uses less alarming wording and says to call Database::reopen(). * QuartzWritableDatabase now stores the total document length and the last docid itself rather than tallying added and removed document length and writing the last docid back every time a document is added. This gives cleaner code and a small performance win. * Make the first key null for blocks more than 1 away from the leaves. It saves disk space for a tiny CPU and RAM cost so is bound to be a win overall. * matcher/localmatch.cc: Fixed problems handling termweights in queries with the same term repeated (bug #37) and added regression test (qterminfo2). * Sped up iteration over all the terms in a database (QuartzCursor now only reads the tag from the Btree if asked to). * Cancelling an operation is now implemented more efficiently. inmemory backend: * Fixed bugs with deleting a document while a PostingIterator over it is active. muscat36 backend: * Fixed to compile now that internal_end_session() has gone (broken in 0.8.1). build system: * Fixed to compile when configured with --disable-inmemory (bug #33). * XO_LIB_XAPIAN now AC_SUBSTs XAPIAN_VERSION so your application's build system can easily check for a particular version of Xapian. * When compiling with GCC, we check that the compiler used to compile the library and the compiler used to compile the application have compatible C++ ABI versions. Unfortunately GCC 3.1 incorrectly reports the same ABI version as GCC 3.0, so we now special case that test. * Bumped the versions of the autotools we require for bootstrapping, and updated the documentation of these in the HACKING document. * Quote macro names to fix warnings from newer aclocal. documentation: * Improved API documentation for Xapian::WritableDatabase::replace_document and delete_document. * Added documentation comments for MSet methods size(), empty(), swap(), begin(), end(), back(). * Removed bogus documentation comments saying that some Enquire methods can throw DatabaseOpeningError. * Updated quartz design docs to reflect recent changes. Also pulled out the Btree and Bcursor API docs and slotted them in as doxygen documentation comments - this way they're much more likely to be kept up-to-date. * Corrected multiple occurrences of "an Xapian::XXX" to "a Xapian::XXX" (presumably these all resulted from replacing "Om" with "Xapian::"). * Various minor updates and improvements. portability: * Reworked how we cope with fcntl.h #define-ing open on Solaris. This change finally allows Sun's C++ compiler to produce a working Xapian build on sparc Solaris! * configure.ac: Don't define DATADIR - we no longer use it and clashes with more recent mingw headers. * matcher/andpostlist.cc: Initialise lmax and rmax to 0. This cures the SIGFPE on apitest's qterminfo2 on alpha linux. Xapian-core 0.8.1 (2004-06-30): API: * New method Xapian::Database::get_lastdocid which returns the highest used document id for a database (useful for re-synchronizing an indexer which was interrupted). Implemented for quartz and inmemory. * Xapian::MSet::get_matches_*() methods now take collapsing into account, and the documentation has been clarified to state explicitly that collapsing and cutoffs are taken into account (bug#31). * Xapian::MSet: Need to adjust index by firstitem when indexing into items (bug#28). * MSetIterator and ESetIterator are now bidirectional iterators (rather than just input iterators) * Fixed post-increment forms of PostingIterator, TermIterator, PositionIterator, and ValueIterator so that *i++ works (as it must for them to be true input iterators). * Xapian::QueryParser: If we fail to parse a query, try stripping out non-alphanumerics (except '.') and reparsing. * Fixed memory leaked upon Xapian::QueryParser destruction. * Removed several unused Xapian::Error subclasses (these were used by the indexer framework which we decided was a failed experiment). testsuite: * queryparsertest: Pruned near-duplicate queryparsertest testcases. * queryparsertest: Added test case for `term NOT "a phrase'. * remotetest: Use 127.0.0.1 instead of localhost so that tcpmatch1 doesn't fail just because the network setup is broken. * apitest: Make emptyquery1 check that Query("") causes an InvalidArgumentError exception. quartz backend: * Fixed bug which meant we sometimes failed to remove a posting when deleting or replacing a document. * Fixed PostlistChunkReader to take a copy of the postlist data being read to avoid problems with reading data from a string that's been deleted. * Fixed bug in postlist merging which could occasionally extend a postlist chunk to overlap the docid range of the next chunk. * Eliminated the split cursor in each Btree object - we only actually need a single block buffer to handle splitting blocks. This reduces the memory overhead of each Bcursor (and hence each QuartzPostList). * Changed 2 calls to abort() to throw Xapian::DatabaseCorruptError instead, * If Btree is writable, throw DatabaseCorruptError if we detect overwritten. * Check the return value of fdatasync()/fsync()/_commit() and raise an error. If they fail, we really want to know as it could cause data corruption. * Assorted clean ups, improved comments, debug tracing, assertions. * When merging in postlist changes, removed an unneeded call to QuartzBufferedTable::get_or_make_tag() in a case when we're using a cursor which has already fetched the tag. * Added SON_OF_QUARTZ define to disable incompatible changes to database formats by default, and use it to control the docid encoding for keys such that we're always inserting at the end of the table when added new documents. * Reopening the readonly version of a writable Btree is now more efficient (we used to close and reopen all the files and destroy and recreate a lot of objects and buffers). * Share file descriptors between the read and write Btree objects so that a quartz WritableDatabase now uses 5 fds rather than 10. * Added configure test for glibc, because otherwise we need to include a header before we can check for glibc in order to define something we should be defining before we include any headers! Defining _XOPEN_SOURCE on OpenBSD seems to do the opposite to Linux and *disable* pread and pwrite! backends: * Stripped out the session machinery - all that is actually required is to ensure that any unflushed changes are flushed when the destructor runs. * A few other backend interface cleanups. build system: * Unified the shlib version numbers (the small benefit of tracking them individually makes it hard to justify the extra work required, and having one version simplifies debian packaging too). * configure.in: Fix typo (STLPORT_CXXLAGS -> STLPORT_CXXFLAGS) * Removed trivial m4/Makefile.am and and autoconf/Makefile.am and do the work from the top level Makefile.am instead. It's easier to see the structure this way, and it also removes a couple of recursive make invocations which will speed up builds a little. documentation: * HACKING: Added a list of subtasks when doing a release. Currently it's always me that does this, but it may not always be and anyhow it'll help me to have a list to run through. * include/xapian/database.h: Remove references to sessions in doxygen comments. * docs/quickstart.html: Corrected lingering reference to "om.h" and note that we need <iostream>. * docs/quickstartindex.cc.html,docs/quickstartexpand.cc.html, docs/quickstartsearch.cc.html: Add <iostream>. * PLATFORMS,AUTHORS: Updated. * docs/quartzdesign.html: Corrected various pieces of out of date information, and improved wording in a couple of places. * docs/scalability.html: Removed the reference to the Quartz update bottleneck "currently being addressed for Xapian 0.8" as it's now been addressed! Also reworded to remove use of first person (it was originally a message sent to the mailing list). Xapian-core 0.8.0 (2004-04-19): * Omega, xapian-examples and xapian-bindings now have their own NEWS files. API: * Throw an exception when an empty query is used to build in the binary operator Query constructor (previously this caused a segfault. Added regression test. * Made the TradWeight constructor explicit. This is technically an API change as before you could pass a double where a Xapian::Weight was required - now you must pass Xapian::TradWeight(2.0) instead of 2.0. That seems desirable, and it's unlikely any existing code will be affected. * Added "explicit" qualifier to constructors for internal use which take a single parameter. * Renamed Xapian::Document::add_term_nopos to Xapian::Document::add_term (with forwarding wrapper method for compatibility with existing code). * The reference counting mechanism used by most API classes now handles creating a new object slightly more efficiently. * Xapian::QueryParser: Don't use a raw term for a term which starts with a digit. testsuite: * apitest, quartztest: Added a couple of tests, and commented out some test lines which fail in debug builds. * quartztest: cause a test to fail if there's still a directory after a call to rmdir(), or if there isn't a directory after calling mkdir(). * apitest: Check returned docids are the expected values in a couple more cases. Improved wording of a comment. quartz backend: * We now merge a batch of changes into a posting list in a single pass which relieves an update bottleneck in previous versions. * When storing the termlist, pack the wdf into the same byte as the reuse length when possible - doing so typically makes the termlist 14% smaller! This change is backward compatible (0.7 database will work with 0.8, but databases built or updated with 0.8 won't work with 0.7). * quartzcheck: Check the structure within the postlist Btree as well as the Btree structures themselves. * Reduced code duplication in the btree manager and btreechecking code. * quartzdump: Backslash escape space and backslash in output rather than hex encoding them; renamed start-term and end-term to start-key and end-key; removed rather pointless "Calling next" message; if there's an error, write it to stderr not stdout, and exit with return code 1. * Corrected a number of comments in the source. * Removed several needless inclusions of quartz_table_entries.h. * Removed OLD_TERMLIST_FORMAT code - it has been disabled for since 0.6.0. * Removed all the quartz lexicon code and docs. It's been disabled for ages, and we've not missed it. build system: * XO_LIB_XAPIAN autoconf macro can now be called without arguments in the common case where you want the test to fail if Xapian isn't found. * Fixed the configure test for valgrind - it wasn't working correctly when valgrind was installed but was too a version to support VALGRIND_COUNT_ERRORS and VALGRIND_COUNT_LEAKS. * GCC 2.95 supported -Wno-long-long and is our minimum recommended version, so unconditionally use -Wno-long-long with GCC, and don't test for it on other compilers (the old test incorrectly decided to use it with SGI's compiler resulting in a warning for every file compiled). documentation: * Updated the quickstart tutorial and removed the warning that "this document isn't up to date". * docs/intro_ir.html: Added a link to "Information Retrieval" by Keith van Rijsbergen which can be downloaded from his website! * docs/quartzdesign.html: Some minor improvements. * docs/matcherdesign.html: Merged in more details from a message sent to the mailing list. * docs/queryparser.html: Grammar fixes. * Doxygen wasn't picking up the documentation for PostingIterator and PositionListIterator - fixed. Added doxygen comments for Xapian::Stopper and Xapian::QueryParser. * PLATFORMS: Updated with many results from tinderbox and from users. * AUTHORS: Updated the list of contributors. * HACKING: XAPIAN_DEBUG_TYPES should be XAPIAN_DEBUG_FLAGS. * HACKING: Updated to mention that building from CVS requires `./configure --enable-maintainer-mode' (or use bootstrap). * HACKING: Added notes about using "using", and pointers to a couple of useful C++ web resources. portability: * Solaris: Code tweaks for compiling with Sun's C++ compiler. * IRIX: Code tweaks for compiling with SGI's C++ compiler. * NetBSD mkdir() doesn't cope with a trailing / on the path - fixed our code to cope with this. * mingw/cygwin: Only use O_SYNC (on the debug log) if the headers define it. * backends/quartz/quartz_table_manager.cc: Fix for building on mingw. * mingw: Added configure test for link() to avoid infinite loop in our C++ wrapper for link. * mingw and cygwin both need -Wl,--enable-runtime-pseudo-reloc passing when linking. Arrange for xapian-config to include this, and check that the ld installed is a new enough version (or at least that it was at configure time). Also pass to programs linked as part of the xapian-core build. * cygwin: Close a QuartzDatabase or QuartzWritableDatabase before trying to overwrite it - cygwin doesn't allow use to delete open/locked files... * backends/quartz/quartz_termlist.cc: Use Xapian::doccount instead of unsigned int in set_entries(). * Database::Internal::Internal::keep_alive() should be Database::Internal::keep_alive(). * Make Xapian::Weight::Weight() protected rather than private as we want to be able to call it from derived classes (GCC 3.4 flags this, other compilers seem to miss it). debug code: * Open debug log with flag O_WRONLY so that we can actually write to it! * backends/quartz/quartz_values.cc: Fixed problem with dereferencing a pointer to the end of a string in debug output. Xapian 0.7.5 (2003-11-26): API: * Xapian::QueryParser now supports prefixes on phrases and expressions (e.g. author:(twain OR poe) subject:"space flight"). * Added missing default constructors for TermIterator, PostingIterator, and PositionIterator classes. * Fixed PositionIterator assignment operator. testsuite: * queryparsertest: Added testcase for new phrase and expression prefix support. * apitest: Added regression tests for API fixes. backends: * quartzcompact: Fix the name that the meta file gets copied to (was /path/to/dbdirmeta rather than /path/to/dbdir/meta). build system: * Changed to using AM_MAINTAINER_MODE. If you're doing development work on Xapian itself, you should configure with "--enable-maintainer-mode" and ideally use GNU make. * Fixed configure test for fdatasync to work (I suspect a change in a recent autoconf broke it as it relied on autoconf internal naming). * Fully updated to reflect move of libbtreecheck.la from backends/quartz to testsuite. btreetest and quartzcheck should build correctly now. documentation: * Added first cut of documentation for Xapian::QueryParser query syntax. * Fixed incorrectly formatted doxygen documentation comments which resulted in some missing text in the collated API and internal classes documentation. * Documented --enable-maintainer-mode and problems with BSD make in HACKING. * Fixed typo in docs/scalability.html. * PLATFORMS: Updated from the tinderbox. omega: * omega: Parsing of the probabilistic query is now delayed until we need some information from it. This means that we can now use options set by the omegascript template to control the behaviour of the query parser. $set{stemmer,...} now controls the stemming language (e.g. $set{stemmer,fr}) and $setmap{prefix,...} now sets the QueryParser prefix map (e.g. $setmap{prefix,subject,XT,abstract,XA}). * omega: Fixed $setmap not to add bogus entries. * docs/omegascript.txt: Expanded documentation of $set and $setmap to list values which Omega itself makes use of. * omega: Cleaned up the start up code quite a bit. * omega: Removed the unfinished code for caching omegascript command expansions. Added code to cache $dbsize. The only other value correctly marked for caching is already being cached! Xapian 0.7.4 (2003-10-02): API: * Fixed small memory leak if Xapian::Enquire::set_query() is called more than once. * Xapian::ESet now has reference counted internals (library interface version bumped because of this). * Removed unused OmDocumentTerm::termfreq member variable. * OmDocumentTerm ctor now takes wdf, and replaced set_wdf() with inc_wdf() and dec_wdf(). * Removed unused open_document() method from SubMatch and derived classes. * Calls made by the matcher to Document::Internal::open_document() now use the lazy flag provided for precisely this purpose, but apparently never used - this should give quite a speed boost to any matcher options which use values (e.g. sort, collapse). testsuite: * Finished off support for running tests under valgrind to check for memory leaks and access to uninitialised variables. * apitest: Sped up deldoc4. * btreetest: Removed superfluous `/'s from constructed paths. * quartztest: adddoc2 now checks that there weren't any extra values created. backends: * quartz: don't start the document's TermIterator from scratch on every iteration in replace_document(). Should be a small performance win. * quartz: Pass 0 for the lexicon/postlist table when creating a termlist just to find the doc length. * quartz: quartz_table_entries.cc: Removed rather unnecessary use of const_cast. * quartz: quartz_table.cc: Removed unused variable. * quartz: Improved encapsulation of class Btree. build system: * libbtreecheck.la now has an explicit dependency on libxapian.la. * We now set the dependencies for libxapian correctly so that linking applications will pull in other required libraries. * matcher/Makefile.am: Ship networkmatch.cc even if "make dist" is run from a tree with the remote backend disabled. * configure.in: Sorted out tests for gethostbyname and gethostbyaddr using standard autoconf macros. * configure.in: If fork is found, but socketpair isn't, automatically disable the remote backend rather than configure dying with an error. * autoconf/: Removed various unused autoconf macros. portability: * xapian-config.in: Link with libxapianqueryparser before libxapian, since that's the dependency order. * Removed or replaced uses of <iostream> and <iosfwd> in the library sources - we don't need or want the library to pull in cin and friends. * extra/queryparser.yy: Fixed to build with Sun's C++ compiler. * Make the dummy source file C++ rather than C so that automake tells libtool that this is a C++ library - vital for correct linking on some platforms. * Makefile.am: Pass -no-undefined to libtool so that we can build build a DLL on MS Windows. * configure.in: Fixed check for socketpair - we were automatically disabling the remote backend on platforms where socketpair is in libsocket (such as Solaris). * Use O_BINARY for binary I/O if it exists. * common/utils.h: mkdir() only takes one argument on mingw. * common/utils.h,testsuite/backendmanager.cc: Touch file using open() rather than system(). * common/utils.cc: Fixed to compile if snprintf isn't available. documentation: * docs/scalability.html: Fixed slip (32GB should be 32TB); Added note about Linux 2.4 and ext2 filesize limits. * PLATFORMS: Updated. * NEWS: Fixed a few typos. bindings: * xapian.i: using namespace std in SWIG parsed segment to sort out typemaps. packaging: * Updated RPM packaging. omega: * omega: $topdoc now ensures the match has been run; $date no longer ensures the match has been run. * omega: Fixed to build with Sun's C++ compiler. Xapian 0.7.3 (2003-08-08): API: * MSetIterator: Fixed MSetIterator::get_document() to work when get_mset() was called with first != 0 (regression test msetiterator3). testsuite: * internaltest: Changed test exception1 to actually test something (hopefully what was originally intended!) * Added long option support to the testsuite programs (and quartzdump). * Testsuite now builds on platforms for which we use our own stringstream implementation. * Only use \r in test output if the output is a tty. * Increased default timeout used by tests running on the remote backend from 10 seconds to 5 minutes to avoid tests failing just because the machine running them is slow and/or busy. * Fixed check for broken exception handling - we were getting "Xapian::" prefixed to one version and not on the other. * tests/runtest: Set srcdir if it isn't already to make it easy to manually run test programs from a VPATH build. * apitest: Check termfreq in allterms4. backends: * quartz: Fixed allterms TermIterator to not give duplicate terms when a posting list is chunked; added regression test (allterms4). * quartz: Check for EINTR when reading or writing blocks and retry the operation. This should mean quartz won't fail falsely if a signal is received (e.g. if alarm() is used). build system: * Renamed libomqueryparser to libxapianqueryparser - for backward compatibility we still provide a library with the old name for now. * xapian.m4: Added XO_LIB_XAPIAN to replace OM_PATH_XAPIAN. XO_LIB_XAPIAN will automagically enable use of "xapian-config --ltlibs" if A[CM]_PROG_LIBTOOL is used in configure.in. * xapian-config: Now supports linking with libtool - using libtool means that the run-time library path is set and that you can now link with an uninstalled libxapian. Also xapian-config will now work once xapian-core's configure has been run, rather than only after "make all". * xapian-config: Now automatically tries to link libxapianqueryparser too. * bootstrap: Removed bootstrap scripts in favour of top-level bootstrap which creates a top-level configure you can optionally use to configure all checked out Xapian modules with one command, and which creates a top level Makefile to build all checked out Xapian modules with one command. * Added versioning information to libxapian and libxapianqueryparser. * xapian-example/omega: Use libtool and XO_LIB_XAPIAN so we can link with an uninstalled Xapian, and so the run time load path gets built into the binaries (no need to set LD_LIBRARY_PATH just because you install Xapian with a non-standard prefix). * configure: Stop the API documentation from being regenerated when include/xapian/version.h changes (since it's generated by configure). * Fixed "make dist" in VPATH builds. portability: * common/getopt.h: #include <stdlib.h>, <stdio.h>, and <unistd.h> before defining getopt as a macro - this avoids problems with clobbering prototypes of getopt() in system headers. * bin/quartzcompact.cc: Need stdio.h for rename(). * languages/Makefile.am: Fixed compilation for compilers other than GCC. * Moved rset serialisation into a method of RSet::Internal, so omrset_to_string() is now just glue code. This eliminates the need for it to be a friend of RSet::Internal which Sun's C++ compiler didn't seem to be able to cope with. documentation: * Fix incorrect documentation comment for Enquire::set_set_forward(). (Looked like a cut&paste error) * COPYING: Updated FSF address, and reinstated missing section: "How to Apply These Terms to Your New Programs" * PLATFORMS: Updated some linux results: RH7.3 on x86, and Debian on alpha and arm; Updated FreeBSD success report; Updated with results from the tinderbox. * docs/mkdoc.pl: Don't choke on a comment at the end of the DIST_SUBDIRS line in a Makefile.am. * HACKING: Improved note about why libtool 1.5 is needed. * HACKING: Added note about additional tools needed for building a distribution. bindings: * Fixed VPATH builds. * python: Fixed to link with libomqueryparser. * guile,tcl8: Updated typemaps to SWIG 1.3 style. omega: * omindex.cc: Added missing `#include <errno.h>'. * omindex/scriptindex: Fixed signed character issue in accent normalisation. * omindex: fixed memory and file descriptor leak on indexing a zero-sized file. * omindex: Fixed sense of test for unreadable files. * omindex: Improved log messages to distinguish re-indexed/added. * omindex,omega,scriptindex: Fixed to compile with mingw. * omindex: Fixed to compile with GNU getopt so we can build on non-glibc platforms. examples: * msearch: Quick fix to get mingw building going. * getopt: Copied over our fixes for better C++ compatibility. * simplesearch: Stem search terms. * simpleindex: Fixed not to run words together between lines. * simpleindex: Create database if it doesn't exist. Xapian 0.7.2 (2003-07-11): testsuite: * Fixed NULL pointer dereference when a test threw an unexpected exception. backends: * Quartz: When asked to create a quartz database, try to create the directory if it doesn't already exist. Then we don't have to do it in every single Xapian program which wants to create a database... portability: * common/getopt.h: Fixed to work better with C++ compilers on non-glibc platforms. * common/utils.h: missing #include <ctype.h> * Quartz: Defined _XOPEN_SOURCE=500 for GLIBC so we get pread() and pwrite(). * common/utils.h: Improved mingw implementation of rmdir(). documentation: * PLATFORMS: Added MacOS X 10.2 success report. * Improvements to doxygen-generated documentation. bindings: * Moved to separate xapian-bindings module. * Added configure check for SWIG version (require at least 1.3.14). * bindings/swig/xapian.i: Fixed over-enthusiastic automatic conversion of termname to std::string. * PHP4 bindings much closer to working once again; updated guile and tcl8 somewhat. omega: * omega: If the same database is listed more than once, only search the first occurrence. * omega: use snprintf to help guard against buffer overflows. Xapian 0.7.1 (2003-07-08): testsuite: * Fixed testsuite programs to not try to use "rm -rf" under mingw. backends: * Quartz: Use pread() and pwrite() on platforms which support them. Doing so avoids one syscall per block read/write. * Quartz block count is now unsigned, which should nearly double the size of database for a given block size. Not tested this yet. omega: * omindex: Fixed compilation problem in 0.7.0. documentation: * Added new document discussing scalability issues. * PLATFORMS: Updated. Xapian 0.7.0 (2003-07-03): API: * Moved everything into a Xapian namespace, which the main header now being xapian.h (rather than om/om.h). * Three classes have been renamed for better naming consistency: OmOpeningError is now Xapian::DatabaseOpeningError, OmPostListIterator is now Xapian::PostingIterator, and OmPositionListIterator is now Xapian::PositionIterator. * xapian.h includes <iosfwd> rather than <iostream> - if you were relying on the implicit inclusion, you'll need to add an explicit "#include <iostream>". * Replaced om_termname with explicit use of std::string - om_termname was just a typedef for std::string and the typedef doesn't really buy us anything. * Older code can be compiled by continuing to use om/om.h which uses #define and other tricks to map the old names onto the new ones. * Define XAPIAN_VERSION (e.g. 0.7.0), XAPIAN_MAJOR_VERSION (e.g. 0), and XAPIAN_MINOR_VERSION (e.g. 7). * Updated omega and xapian-examples to use Xapian namespace. queryparser: * Xapian::QueryParser: Accent normalisation added; Improved error reporting; Fixed to handle the most common examples found in the wild which used to give "parse error". bindings: * Python bindings brought up to date - use ./configure --enable-bindings to build them. Requires Python >= 2.0 - may require Python >= 2.1. * Enabled optional building of bindings as part of normal build process. Old Perl and Java bindings dropped; for Perl, use Search::Xapian from CPAN; Java JNI bindings will be replaced with a SWIG-based implmentation. internal implementation changes: * Removed one wrapper layer from the internal implementation of most API classes. * Xapian::Stem now uses reference counted internals. * Internally a lot of cases of unnecessary header inclusion have been removed or replaced with forward declarations of classes. This should speed up compilation and recompilation of the Xapian library. * Suppress warnings in Snowball generated C code. * Reworked query serialisation in the remote backend so that the code is now all in one place. The serialisation is now rather more compact and no longer relies on flex for parsing. testsuite: * Moved all the core library tests to tests subdirectory. * apitest now allows backend to be specified with "-b" rather than having to mess with environmental variables. * Testsuite programs can now hook into valgrind for leak checking, undefined variable checking, etc. backends: * Fixed parsing of port number in remote stub databases. * Quartz: Improved error message when asked to open a pre-0.6 Quartz database. * Quartz backend: Workaround for shared_level problem turns out to be arguably the better approach, so made it permanent and tidied up code. build system: * Build system fixed to never leave partial files in place of the expected output if a build is interrupted. * quartzcheck, quartzdump, and quartzcompact are now built by "make" rather than only by "make check". * xapian-config: Removed --prefix and --exec-prefix - you can't reliably install Xapian with a different prefix to the one it was configured with, yet these options give the impression you can. miscellaneous: * Fixed sending debug output to a file with XAPIAN_DEBUG_LOG with a value which didn't contain "%%" (%% expands to the current PID). * Fixed Xapian::MSetIterator::get_collapse_count() to work as intended. omega: * omindex,scriptindex: Normalise accents in probabilistic terms. * omindex: Read output from pstotext and pdftotext via pipes rather than temporary files to side-step the whole problem of secure temporary file creation; Use pdfinfo to get the title and keywords from when indexing a PDF; Safe filename escaping tweaked to not escape common safe punctuation. * omindex: Implement an upper limit on the length of URL terms - this is a slightly conservative 240 characters. If the URL term would be longer than this, its last few bytes are replaced by a hash of the tail of the URL. This means that (apart from hopefully very rare collisions) urlterms should still be unique ids for documents. This is forward and backward compatible for URLs less than 240 characters. * omindex: Clean up processing of HTML documents: - Ignore the contents of <script> and <style> tags in HTML. - Strip initial whitespace in each tag in an HTML document. - Try not to split words in half when truncating title and summary. * query.cc: Set STEM_LANGUAGE near the start of the file so it's easy for users to change until we get better configurability. * omega: Replaced half-hearted logging support with flexible OmegaScript-based approach with new $log command. Also added $now to allow the current date/time to be logged. * templates/xml: added collapse info to xml template. documentation: * Assorted minor documentation improvements. * PLATFORMS: Updated. rpms: * Improved RPM packaging of xapian-core and omega. Xapian 0.6.5 (2003-04-10): * OmEnquire: optimised the handling when sort_bands == 1 and fixed incorrect results in this and some other sorting cases; added some sorting testcases. * OmMSetIterator: added get_collapse_count() which returns a lower bound on the number of items which were removed by collapsing onto the current item. * OmStem: added default OmStem constructor and "none" language. Both of these give a stemmer object which leaves terms unchanged which should allow for simpler logic in programs using Xapian. The default constructor also removes the need to mess with pointers in some cases. * Automatically disable the remote backend if we don't have fork() since the remote backend requires it in several places. * Fixed to build with debug enabled. * testsuite: fixed to still build when some backends are disabled. * extra/parsequerytest.cc: Fixed to build with GCC 2.95. * Testsuite: Added regression test for Quartz bug which caused problems with long terms on machines with signed chars. * testsuite/index_utils.cc: Handling of ^x was just downright wrong due to a typo. * Improved portability: Fix for 64 bit machines. Fixed btreetest to build with older compilers lacking <sstream>. Xapian is now much closer to building with Sun's CFront-based Sun Pro C++ compiler, and with a Linux to mingw cross-compiler. * PLATFORMS: Updated with the results of many test builds. * Improved RPM packaging of xapian-core and omega. * Documentation: Use http://www.doxygen.org/ as URL for doxygen; Fixed bad link to our own website in overview.html; code_structure.html now only includes directories in the build system. * HACKING: updated. * Removed bugs/todo.xml, TODO, TODO.release, docs/todo.html, and docs/todo-release.html from the distribution. Bugs and todo items will be tracked in Bugzilla instead. * Install docs in /usr/share/doc/xapian-core instead of /usr/share/xapian-core. * omega: If xP and P are both empty, there may be a boolean query, so don't force first page of hits. * omega: Fixed off-by-one error in rounding down topdoc - it was possible to get to an empty page of hits if there were exactly a multiple of HITSPERPAGE matches and the matcher over-estimated the number of matches and Omega displayed page links. * omega: Fixed handling of multiple DB parameters to be as documented. * omega: Added $collapsed to report get_collapse_count() for the current hit. * omega: Added $transform{} which does regexp manipulation (currently disabled until configure tests for regexp library are added) * omega: Added $uniq{} to eliminate duplicates from a sorted list. * omega: Don't force page 1 for a query with repeated terms! * omega: removed duplicates from terms listed in term frequencies. * omega: Added cgi parameter COLLAPSE to collapse on key values * omega: Added $value{key[,docid]} support to omegascript * omega: Renamed DATE1, DATE2, and DAYSMINUS to the more meaningful START, END, and SPAN (NB SPAN is days before END, or after START, or before today - whereas SPAN was before *DATE1* or before today). The old parameters names are supported (with the original semantics) for now. * omega: Actually install documentation! * templates/query: propagate B boolean filters * templates/godmode: removed link to EuroFerret image * templates/godmode: added value dumping, for values from 0-255 * omindex: Report correct version number (was hard-wired to 1.0!) * scriptindex: Allow '_' in fieldnames. Diagnose bad characters in fieldnames better. * dbi2omega: Added DBUSER and DBPASSWD environmental variable support so that password protected DBs can easily be used * scriptindex.cc: added missing "#include <stdio.h>" which caused builds to fail for some platforms. Xapian 0.6.4 (2002-12-24): * Quartz backend: Fixed double setting of position list when updating a document with term position information (overall result was correct, just inefficient); when deleting a position_list, don't check if it's empty, just ask the layer below to delete it and let it handle the case when there's nothing to delete; Fixed unpacking of termlist on platforms where char is signed. * OmQueryParser: Added support for searching probabilistic fields (using <field>:<term>); the unstem multimap now includes "." on the end of a term if it was there in the query. * Don't include "om.h" as a dependency for the api docs since it's generated a configure time and the dependency was forcing users to regenerate the documentation, which requires doxygen to be installed. * Bindings: Python bindings updated to work with the updated API (still disabled by default). * Muscat 3.6 backend: Fixed to build with the new database factory functions; fixed compilation warnings; Muscat 3.6 DA and DB databases don't support positional information. Instead of throwing an exception when we try to access it, return an empty position list (like a quartz database with no position information would). This allows copydatabase to be used to convert a Muscat 3.6 database to a quartz one. * Documentation: quartzdesign and todo list updated. * quartzcheck: default mode changed to "v" rather than "+", since "+" is too verbose for a btree of any size; if you pass a quartz database directory, quartzcheck will now check all the tables which make up a quartz database. * quartzcompact: new tool which makes a copy of a quartz database with full compaction turned on - this results in a smaller database which is faster to search. The next update will result in a lot of block splitting though (since all blocks are as full as possible). * omega: Added $unstem to map a stemmed term to the form(s) used in the query; $queryterms now only includes the first occurrence of each stemmed form; $prettyterm makes use of the unstem map; prefer MINHITS to MIN_HITS and RAWSEARCH to RAW_SEARCH since none of the other CGI parameter names have _ separating words (continue to support old names for now); fixed default template to not generate topterms twice, and fixed topterms to not stick outside the green box; corrected omegascript docs - it's $setrelevant not $set_relevant. * scriptindex: index=nopos with new indexnopos action; index and indexnopos now take an optional prefix argument; index=nopos is handled specially for backwards compatibility; added new data action to generate terms for date range searching. Xapian 0.6.3 (2002-12-14): * Updated PLATFORMS and todo list. Noted in HACKING that Bison 1.50 seems to work with Xapian. * OmQueryParser now creates an "unstem" multimap to allow probabilistic query terms to be converted back to the form the user originally typed. * Updated documentation for remote protocol description and the quickstart tutorial which were both very out of date. * No longer use OmSettings to pass matcher parameters. This completes the removal of OmSettings. * Added workaround for problem with cursors sharing levels in the btree. This should fix sporadic problems with large databases (small databases have fewer btree levels so aren't affected). * Stub databases now work again, though with a different format. The new format allows multiple databases to be specified in the stub file. * OmEnquire::get_eset() now takes a flags argument of bit constants |-ed together instead of 2 bools. * Applied Martin Porter's better fix for the btree sequential addition bug which Richard fixed a few months ago. Richard's fix resulted in a correct btree, but didn't always utilise space as efficiently as possible. * Fixed the remote backend to handle weighting schemes after the OmSettings changes. You can now even implement your own weighting scheme and use it with the remote backend provided you register it with SocketServer at runtime (this feature has been on the todo list for ages). Xapian 0.6.2 (2002-12-07): * Set env var XAPIAN_SIG_DFL to stop the testsuite installing its signal handler (may be useful with some debugging tools). * backends/quartz/btree.cc: max_item_size wasn't being set due to some over-zealous code pruning. It was defaulting to 0, and was causing the code to write off the end of allocated memory blocks. * matcher/localmatch.cc: fixed handling of wtscheme() - we were trying to use it for the extra weights, and then double deleting it! * common/omdebug.cc,common/omdebug.h: Fixed permissions on newly created log file (was getting 000!); Simplified class internals; Renamed env vars: OM_DEBUG_FILE is now XAPIAN_DEBUG_LOG, OM_DEBUG_TYPES is now XAPIAN_DEBUG_FLAGS (old versions still work for now). * testsuite/testsuite.cc: Fixed so running "gdb .libs/apitest" finds srcdir (for an in-tree build at least). * Fixed to compile with --enable-debug=full. * docs/remote.html: Updated from OmSettings to factory functions. * PLATFORMS: ixion is actually Linux 2.2. * OmWritableDatabase now has a default constructor. * Weighting scheme now specified by passing OmWeight object to OmEnquire. This also allows user weighting schemes (just subclass OmWeight and pass in an instance of this new class). [This doesn't currently work with the remote backend.] * No longer use OmSettings to specify parameters for constructing databases. Instead there's a factory function for each database type - temporary naming scheme is OmXxx__open(), mostly because it's easy to grep for later. Instead of create and overwrite flags, we pass in a value - a new possible opening mode is "create or open". [At present stub databases and the machinery in InMemory to allow the multierrhandler1 test aren't working. Everything else should be.] * OmEnquire::get_eset() takes parameters instead of an OmSettings object. * Fixed reversed sense of use_query_terms (and fixed reversed sense test in apitest which meant this wasn't spotted). * Documentation: Link to annotated class lists in doxygen generated documentation instead of the rather empty index pages; added doxygen markup so that apidoc now documents header files; updated todo list. * Documentation: intro doc thing was very out of date in places - fixed. * Omega: index .php files as HTML, with the PHP code stripped out; omindex return non-zero return code if an unexpected exception is caught; fixed HTML parser to not read one character past the end of the document in some cases; updated in line with OmSettings related changes to the API; Fixed $dbname to return "default" for the default database instead of ""; templates/query: Removed now unused xDEFAULTOP hidden field, and superfluous "}"; dbi2omega now more efficient and can be restricted to listed fields. Xapian 0.6.1 (2002-11-28): * Fixed to compile with GCC 3.0. * PLATFORMS: Updated. Xapian 0.6.0 (2002-11-27): * Quartz database backend: lexicon disabled (./configure CXXFLAGS=-DUSE_LEXICON to reenable it), and encoding schemes simplified and made more compact; extended and added test cases; minimum block size is now 2048 bytes (as documented before, but now we actually enforce this); btree checking code split off and only linked in when required; tidied up btreetest's output. * Replaced our stemmers with those from Snowball. These give better results, and are actively maintained by Martin Porter (who wrote the original Xapian stemmers too). It also means that Xapian now has stemmers for Finnish, and Russian, and an implementation of Lovins' English stemmer. * Assorted improvements to the documentation, especially the documentation of the internals of the Quartz backend. * Removed the three uses of RTTI (typeid() and dynamic_cast<>) - one was totally superfluous, and the other two easily avoided. * Omega and simpleindex example: limit probabilistic term length to 64 characters to stop the index filling up with junk terms which nobody will ever search for. * Omega: Added dbi2omega perl script to dump any database which perl DBI can access into the dump format expected by scriptindex. Xapian 0.5.5 (2002-12-04): * Fixed compilation with --enable-debug. * Minor documentation updates. * Omega: Fixed paging on default database; removed xDEFAULTOP from the query template as it's no longer used; removed bogus unmatched '}' from query template; added dbi2omega perl script to dump any database which perl DBI can access into the dump format expected by scriptindex; limit length of probabilistic terms generated to 64 characters. Xapian 0.5.4 (2002-10-16): * Fixed a compilation error with "make check" when using GCC 3.2. * PLATFORMS: checked 0.5.3 works on OpenBSD and Solaris 7. Xapian 0.5.3 (2002-10-12): Notable changes: Improvements to the test suite, and internal code cleanups: * Internal code cleanups on Quartz Btree implementation. * Minor documentation updates (TODO and PLATFORMS updated; Martin Porter's stemming paper removed - see the Snowball site for background stemmer info). * Implemented QuartzAllTermsList::get_approx_size(). * Removed a couple of occurrences of "using std::XXX;" from externally visible headers. * With GCC, add warning flags "-Wall -W" rather than "-Wall -Wunused" (-Wall implies -Wunused anyway). Fixed all the warnings this throws up, except in languages/ (that code is to be replaced with Snowball soon). * Test suite: Disable colour test output if stdout isn't a terminal and reworked check for broken exception handling as the previous version never seemed to fire. Other assorted minor improvements. * include/om/om.h is now removed on "make distclean" rather than "make clean". Xapian 0.5.2 (2002-10-06): Further improvements to documentation and portability: * docs/: converted all text docs to HTML (except omsettings which will has odd markup (LaTeX?) and will probably soon be obsolete anyway). * remote backend: Fixed handling of timeouts which are now in the past - fixes test failures with redhat/x86. * quartz backend: now works on 64 bit platforms. * test suite: try to spot mishandled exceptions and stop them causing bogus OMEXCEPT failures. Xapian 0.5.1 (2002-10-02): This release fixes features improved documentation and some build system portability fixes. * PLATFORMS: updated with more test results. * docs/: tidied up layout of HTML documentation; converted the notes about BM25 into HTML; updated stemmer docs to reflect intention to use Snowball instead; included HTML versions of quickstart*.cc. * automake 1.6.3 and autoconf 2.54 are now required for those working from CVS to fix a problem with the generated Makefiles and Solaris make. * net/Makefile.am: Fixed building of readquery.cc from readquery.ll. * buildall script is now deprecated - use the new streamlined bootstrap script in preference. Xapian 0.5.0 (2002-09-20): The last release of the software that is now known as Xapian was OmSee 0.4.1 on November 24th 2000, not far from 2 years ago. There's been a significant amount of development in this time, so we've summarised the most notable changes and improvements: * The project is now called "Xapian". We've renamed the modules in the light of this change: + "om" is now "xapian-core" + "om-examples" is now "xapian-examples", and now contains small, instructive examples which demonstrate how to use Xapian to implement particularly features. + Added "xapian-applications" which contains larger sample applications * Much improved build system - should now build "out of the box" on many Unix platforms. Can now VPATH build with vendor tools on most platforms. Builds as cleanly as we can achieve with GCC 2.95.* (some bogus warnings due to compiler bugs). Should build without warnings on GCC 3.0, 3.1, and 3.2. * If using GCC, om/om.h now contains a check that the compiler used to build Xapian and the compiler used to build the application have compatible C++ ABIs. So you get a clear error message early from the first attempt to compile a file rather than a confusing error from the linker near the end of the build. * RPM packages are now available. We intend to prepare Debian packages in the near future too. * xapian-config no longer support "--uninst". It's hard to make this work reliably and portably, and the effort is better expended elsewhere. Configure with a prefix and install to a temporary directory instead. * Xapian can now work with files > 2Gb on OSes which support them. * Restructured and reworked documentation. * Removed thread locks. We intend to be "thread-friendly" so different threads can access different objects without problems. In the rare event that you want to concurrently call methods on the same object from different threads you need to create a mutex and lock it. Thus the thread lock overhead is only incurred when it's necessary. * Indexgraph removed from core library. It will reappear as an add-on library at some point. * Omega's query parser has now been reworked as a separate library. * Terminology change - "keys" are now known as "values" to avoid confusion, since they're not like keys in a relational database. The exception is when a value is used as a key in some operation, e.g. "match_collapse_key". * Database backends: + Auto backend: can now be used to create a new database. + Auto backend: added support for "stub" databases - a text file specifying the settings for the database to be opened (particularly useful for allowing easy access to specific remote databases). + Quartz backend: many fixes and improvements, and the code has been cleaned up a lot. Implemented deleting of items from postlists. + Remote backend: implemented term_exists() and get_termfreq(); + Multi-backend: the document length is now fetched from the sub-postlist rather than the database, which provides a huge speed-up in some cases. + Sleepycat backend: this experimental backend has been removed. + Muscat 3.6 backends: now disabled by default. * Tests: + Test cases added for most bug fixes and new features. + stemtest: rewritten in C++ rather than part C++, part perl. Now 15% faster. + includetest: removed - it's no longer useful now the code has matured. + Removed problematic leak checking from testsuite. We plan to use valgrind instead soon. * Matcher: + Fixed several matcher bugs which could cause incorrect results in some situations. + Fix bug in expander due to nth_element being called on the wrong element. + Added sorting within relevance bands to the matcher. + Matcher now calculates percentages differently, such that 100% relevance is actually achievable. + Matcher now uses a min-heap rather than nth-element to maintain the proto-mset. This is cleaner and more efficient. + New operator OP_ELITE_SET replaces match_max_or_terms option. + Implemented multiple XOR queries. + Add a new query operator, OP_WEIGHT_CUTOFF, which returns only those documents from a query which have a weight greater than a specified cutoff value. + Removed OmBatchEnquire from system: it may return at a later date, but for now it is simply out of date and a maintenance liability, and gives no significant advantage. + Added experimental match bias functors. * The API has been cleaned up in various places: + OmDocumentContents and OmIndexDoc merged to become OmDocument + OmQuery interface cleaned up + OmData and OmKey removed - methods which used them now just pass a string instead + OmESetItem replaced by OmESetIterator; OmMSetItem by OmMSetIterator; om_termname_list by OmTermIterator + OmDocumentTerm and OmDocumentParams removed + OmMSet::mbound replaced by OmMSet::matches_ {lower_bound,estimated,upper_bound}, giving more information + Xapian iterators now have default constructors + Most API classes now have reference counted internals, so assignment and copying are cheap + OmStem now has copy constructor and assignment operator + and more... |