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New in version 0.8.3:
Library Changes: * BUG FIX: Several bugs on big-ended systems have been fixed. Reported by Dinar Valeev. * BUG FIX: Adding an entry via gd_[m]add() with a negative CARRAY scalar index no longer results in an internal error or worse when the added field is later read. * BUG FIX: Changing a CONST field to a real floating point type using gd_alter_const() (or similar) no longer results in the value of the field being corrupted. * BUG FIX: A bug in the parser's tokeniser has been fixed to prevent spurious "unterminated token" syntax errors. Typically this would only be seen when using gd_strtok() to tokenise a user-supplied string, but carefully crafted format files could also be used to produce it. Bindings Changes: * Bindings for MATLAB have been added. * The IDL, Perl, and Python bindings no longer require a C99 compiler to be built. |==============================================================================| New in version 0.8.2: Library Changes: * BUG FIX: A trailing symlink (i.e. situations where a symlink is the last element of a path) no longer confuses GetData when the target of the symlink: (1) is absolute, or (2) starts with "../". Reported by S. J. Benton. * BUG FIX: Trying to read data from the first sample of an MPLEX no longer results in an internal error if the first sample of the index doesn't match the target value. |==============================================================================| New in version 0.8.1: Library Changes: * BUG FIX: A segfault when negotiating symbolic links in file paths, typically manifesting in gd_open calls, has been fixed. * BUG FIX: gd_strtok now saves a copy of the string passed to it, as the documentation suggests it should. Previously it cached the pointer itself. * BUG FIX: A number of minor memory leaks, mostly occurring when the library encounters an error, have been fixed. * BUG FIX: /HIDDEN directives weren't being written for aliases. * BUG FIX: The parser now fails properly on /INCLUDEs which specify paths which don't point to regular files. * BUG FIX: Fixed a bug which would result in the parser getting confused over the current Standards Version, potentially leading to rejected valid dirfiles. Reported by Daniel Flanigan. * WIN32 BUG FIX: On Windows, the parser can now properly handle hexadecimal floating point. API Changes: * How the API deals with field code affixes has changed. Input vector and scalar fields are reported by gd_entry(), &c. now include their prefix and suffix, if any, which should remove the need to do manual affix bookkeeping when reading metadata. The other side to this change is that when modifying metdata (gd_add(), gd_alter_entry(), &c.), supplied field codes must also contain the appropriate suffixes. * gd_dirfilename() now returns a fully canonicalised version of the dirfile path. * A new function, gd_linterp_tablename() has been added which returns a fully canonicalised version of the look-up table pathname for a LINTERP. * BUG FIX: gd_alter_entry() and gd_madd_alias() weren't clearing the Dirfile error before operation, resulting in them failing erroneously in certain situations. * BUG FIX: When including an existing fragment which itself has subfragments, gd_include() no longer returns the wrong fragment index. Bindings Changes: * F77 BUG FIX: A memory leak has been fixed in GDALLC. |==============================================================================| New in version 0.8.0: Dirfile Changes: * Dirfile Standards Version 9 has been released. It adds two new field types: MPLEX, which allows multiplexing multiple low-rate channels in one high-rate one, and WINDOW, which extracts a portion of a field based on the value of a second field. More changes are listed below. * Alternate field names may be defined using the /ALIAS directive. Aliases can't be used as a parent when defining metafields, but are otherwise indistinguishable from a field's original ("canonical") name. * The /VERSION directive now has fragment scope, which should alleviate some of the problems associated with "version leakage" found in previous versions. Previous versions are unchanged, but a "/VERSION 9" directive will not propagate back up into a parent fragment, nor will any /VERSION directive be propagated back up into a Version 9 fragment. * Fields may be "hidden" using the /HIDDEN directive. The Standards don't say what a "hidden" field does, but GetData will, by default, exclude them from the count and list functions. * Literal integers in the format may now be specified in octal (using 0####) or hexidecimal (using 0x##### or 0X#####) in addition to decimal. C99-standard hexidecimal floating point literals (0x##.##p##, &c.) are also accepted. * The /INCLUDE directive can take two additional, optional parameters which specify a prefix and/or suffix used to modify the entry names of the fields defined in the included fragment. (The intent of this is to permit the inclusion of multiple subdirfiles which define the same set of fields, by modifying their field names.) * Three new encoding schemes are available. The first is the Sample- Index Encoding (SIE), similar to run-length encoding, useful for compressing data which changes very rarely varying data. Like the ASCII encoding, GetData implements it internally, so it's always available. The other two schemes (zzip and zzslim) are based around the ZZip library, an access library for PKWARE ZIP files. These are unusual in that they store all raw data in the same ZIP archive. * The /ENCODING directive takes an optional second token. The zzip and zzslim encoding schemes optionally use this token to specify the name of the combined ZIP archive. * The data type names FLOAT (an alias for FLOAT32) and DOUBLE (an alias for FLOAT64) have been deprecated. Library Changes: * On POSIX systems, GetData now caches the dirfile directory (and any other necessary subdirectories). This guards against third-parties renaming the directory while GetData is interested in it. * GetData is, in general, more careful about pathname management. At least on POSIX systems, it will now try to canonicalise all paths it comes across, including resolving symlinks. As a result, GetData no longer becomes befuddled by a caller who opens a Dirfile with a relative pathname and then calls chdir(2). Functions like gd_fragmentname() and gd_raw_filename() now return canonicalised paths. * The library no longer forces a sync of all raw data on close. The sync causes a flush of filesystem buffers, which is usually unnecessary overhead, and degredatious to efficient disk I/O. Use an explicit gd_sync() or gd_flush() before closing to recover the old behaviour, if desired. * The error messages output by GetData with GD_VERBOSE turned on now has "libgetdata: " prefixed to it. A further prefix may be specified by the caller. * When truncating a dirfile, the primary format file is no longer deleted and then recreated. Instead, it is simply truncated in-place. This change means that a Dirfile which is undergoing truncation always appears (to GetData, at least) to be a valid Dirfile, which can be useful if it is being concurrently read. * Write support for gzip-encoded data has been added. Writes occur out of place, which means sufficient space on the filesystem is needed for a second copy of every field being written. Writing to a gzip compressed field requires uncompressing the portion of the field before the write of the existing file, recompressing it to the temporary file, then writing the new data to the temporary file. A subsequent write at a later position, will continue to write to the compressed file, but a subsequent write to an earlier position requires coping all remaining data from the old file to the temporary file, finalising it, moving it over top of the old file, and then starting afresh with a new temporary file. As a result, it's not very fast, and likely should be avoided for non-sequential writes. * Raw data files are now only opened for writing if writing is going to occur. In particular, this means that opening a dirfile with GD_RDWR will still work even if you don't have write access to it, so long as you don't try writing to it. * GetData now tracks a "current location" for all RAW files, and allows reads and writes to occur at the "current location" (via the special symbol GD_HERE). For some derived fields the idea of a "current location" doesn't make sense, and this won't work. * BUG FIX: In previous versions, renaming a field with gd_rename() wouldn't update or invalidate the cache of fields which depended on the old name, leading to surprising results. It will now either invalidate these fields' metadata caches or else change the name in those definitions as well. * BUG FIX: The invalid syntax "/META parent/child granchild ..." is now properly rejected by the parser. Previously it half-worked, resulting in a segfault in gd_close(). * BUG FIX: Several syntax errors encountered in PHASE and RECIP field specifications weren't being reported by the parser, leading to corrupted metadata on open. * BUG FIX: GetData no longer omits the input field to a RECIP when writing metadata to disk. Nor does it forget to put newlines after RECIP or DIVIDE field specifications. * BUG FIX: GetData no longer assumes all LINCOM input fields have the same number of samples per frame. * BUG FIX: Writing an empty fragment with GD_PRETTY_PRINT turned on no longer results in a floating-point exception. * BUG FIX: Renaming a field now properly flags the fragment which contains it as dirty, which will ensure the rename is writen to disk when the metadata are next flushed. * BUG FIX: Whitespace within tokens is now properly escaped when metadata is flushed to disk. * BUG FIX: The parser no longer gets tripped up by two character escape sequences in a row, nor by an escape sequence at the start of a token. * BUG FIX: "/PROTECT data" directives are now being written when they should be. Previously, they were dropped completely. Reported by Alexandra Rahlin. * BUG FIX: CARRAY indices provided to gd_add() in the entry.scalar_ind member are no longer ignored. Reported by S. J. Benton. * BUG FIX: When adding a metafield with gd_(m)add(), GetData no longer checks the protection of the fragment indexed by entry->fragment_index. Instead it ignores entry->fragment_index completely (as the documentation indicates it should) and checks the protection of the fragment containing the parent field. API Changes: * Functions which add fields (gd_add(), gd_add_<type>(), &c.) can now be used to add metafields by using their full "parent/name" field code. The old, explicit metafield adding routines (gd_madd(), &c.) are still available. * As with their corresponding names in the Standards, the gd_type_t symbols GD_FLOAT and GD_DOUBLE are now deprecated. Use GD_FLOAT32 and GD_FLOAT64 as appropriate. * A new open flag, GD_TRUNCSUB, will cause GD_TRUNC to descend into subdirectories of a directory it is truncating. If not specified along with GD_TRUNC, it does nothing. * New public functions gd_nentries() and gd_entry_list() provide a generic interface to the field counting and list functionality. The other functions (gd_nfields(), gd_nfields_by_type(), &c. and gd_field_list(), gd_field_list_by_type(), &c.) are now simply special cases of these two functions. * The "hiddenness" of a field name may be queried with gd_hidden(), set with gd_hide() and cleared with gd_unhide(). * /INCLUDE affixes may be queried with gd_fragment_affixes() and added, modified or deleted with gd_alter_affixes(). A new fragment can be added to the dirfile with affixes using gd_include_affix(). * New aliases may be added with gd_add_alias() or gd_madd_alais. The target of an alias is retrned by gd_alias_target(); a list of aliases of a field, or their number, is returned by gd_aliases() and gd_naliases(). * Because GetData considers aliases and canonical names to be indistinguishable, passing an alias name to most functions will result in the function operating on target field. To manipulate aliases themselves, the API has the new interfaces gd_move_alias() and gd_delete_alias(). * In addition to the special symbol GD_HERE which may be passed to gd_getdata() and gd_putdata(), the "current location" of fields may be queried with gd_tell() and moved with gd_seek(). * The typedefs gd_bit_t and gd_spf_t have been deprecated. They are replaced with 'int' and 'unsigned int' respectively. For backwards compatibility, the typedefs (with their new types) are still declared in getdata.h, but the API no longer makes use of them. * GetData's tokeniser has been exposed to the public API via the gd_strtok() function, which works similar to strtok(3), and returns successive tokens of a string given it. * A new function gd_error_count() returns the number of GetData errors encountered on a Dirfile since it was last called (or since the Dirfile was opened). This is useful for programs that care whether *something* failed, but don't really care what it was. * Reading MPLEX fields can result in inefficiencies due to GetData having to look backwards for the first value of the part of the derived field requested. A new function, gd_mplex_lookback(), can be used to alter how much lookback is done, if any. * The "move_data" flag in gd_rename() has been replaced with a generic "flags" parameter. Two rename flags are defined: GD_REN_DATA, which recovers the old behaviour of move_data, and GD_REN_UBDB which will cause references to the renamed field to be renamed also in derived fields which refer to it. Without GD_REN_UBDB, these definitions are left unchagned. * Flags which affect the long-term operation of GetData may be modified after open using gd_flags(). Currently these flags are just GD_VERBOSE and GD_PRETTY_PRTNT. * The gd_flush() function, which both syncs and closes RAW files, has been broken up into its two parts with two new functions: gd_sync(), which just syncs and gd_raw_close(), which just closes. gd_flush() still does both. * Using the new gd_desync() function will cause GetData to determine whether the Dirfile metadata on disk has changed since the Dirfile was opened. * A prefix to the automatic error messages printed by GetData when using the GD_VERBOSE flag may be specified with gd_verbose_prefix(). * When requesting the exclusive creation of a new dirfile with (GD_CREAT | GD_EXCL) GetData will now return the new error GD_E_EXISTS if the dirfile already exists. Previously it would return GD_E_CREAT in this situation. * The error codes GD_E_BAD_ENDIANNESS, GD_E_BAD_PROTECTION, and GD_E_BAD_VERSION have been combined into a more generic error code: GD_E_ARGUMENT. The old symbols are retained for backwards compatibility but have been marked deprecated. * CONST and CARRAY handling has been combined somewhat. When passed to {get,put}_carray[_slice]() or gd_carray_len(), CONSTs behave like length-one CARRAYs. Similarly, {get,put}_constant() will operate on the first element of a CARRAY, as if it were a CONST field. * C89 API: Passing NULL to gd_alter_crecip() for cdividend is now treated as if it were passed zero (ie. it indicates no change for cdividend). * BUG FIX: calling gd_putdata() with num_frames and num_samples both zero no longer confuses GetData: instead it simply does nothing. * BUG FIX: gd_spf() now returns GD_E_DIMENSION when passed a scalar field code, as the documentation says it should. Previously it returned GD_E_BAD_FIELD_TYPE. Legacy API Changes: * The never-used n_mplex/mplexEntries part of the FormatType now has a use: both MPLEX and WINDOW entries are reported there. Bindings Changes: * Bindings for Perl5 have been added. Perl is not well suited to numerical analysis, and the bindings may be inefficient. * F77: Due to small namespace issues, the encoding parameters (corresponding to the GD_...ENCODED symbols in the C API) have all been renamed. They are now of the form GDE_xx. * C++: The bindings now make use of the explicitly-64-bit offset type gd_off64_t defined in getdata.h. Previously, the bindings tried to force off_t to be 64-bit through preprocessor shenanigans, which led, in certain cases, to linking problems down the road when used by third parties. * Python: The return_type, num_fields, and num_samples parameters to dirfile.getdata() are now optional. The return_type defautls to pygetdata.FLOAT, and if neither num_fields nor num_samples are given, all frames (ie. the value of dirfile.nframes) are returned. * IDL: A number of undocumented, unnecessary function aliases have been removed. They should be replaced with their canonical names, without change in use: Alias Replacement ---------------------- ---------------- GD_ADD_CLINCOM GD_ADD_LINCOM GD_ADD_CPOLYNOM GD_ADD_POLYNOM GD_ADD_CRECIP GD_ADD_RECIP GD_ALTER_CLINCOM GD_ALTER_LINCOM GD_ALTER_CPOLYNOM GD_ALTER_POLYNOM GD_ALTER_CRECIP GD_ALTER_RECIP GD_FIELD_LIST_BY_TYPE GD_ENTRY_LIST GD_FRAMENUM_SUBSET GD_FRAMENUM GD_MADD GD_ADD GD_MADD_BIT GD_ADD_BIT GD_MADD_CARRAY GD_ADD_CARRAY GD_MADD_CLINCOM GD_ADD_LINCOM GD_MADD_CPOLYNOM GD_ADD_POLYNOM GD_MADD_CRECIP GD_ADD_RECIP GD_MADD_DIVIDE GD_ADD_DIVIDE GD_MADD_LINCOM GD_ADD_LINCOM GD_MADD_LINTERP GD_ADD_LINTERP GD_MADD_MULTIPLY GD_ADD_MULTIPLY GD_MADD_PHASE GD_ADD_PHASE GD_MADD_POLYNOM GD_ADD_POLYNOM GD_MADD_RECIP GD_ADD_RECIP GD_MADD_SBIT GD_ADD_SBIT GD_MADD_STRING GD_ADD_STRING GD_MALTER_SPEC GD_ALTER_SPEC GD_MCONSTANTS GD_CONSTANTS GD_MFIELD_LIST GD_ENTRY_LIST GD_MFIELD_LIST_BY_TYPE GD_ENTRY_LIST GD_MSTRINGS GD_STRINGS GD_MVECTOR_LIST GD_VECTOR_LIST GD_NFIELDS_BY_TYPE GD_NENTRIES GD_NMFIELDS GD_NENTRIES GD_NMFIELDS_BY_TYPE GD_NENTRIES GD_NMVECTORS GD_NVECTORS * BUG FIX: All bindings now provide a named constant corresponding to the C API error GD_E_UNKNOWN_ENCODING, which was overlooked in previous releases. * IDL BUG FIX: The missing /IGNORE_REFS and /PRETTY_PRINT are now available in gd_open. |==============================================================================| New in version 0.7.3: Library Changes * BUG FIX: Passing a zero dividend to alter_crecip() and alter_recip() now results in the dividend not changing, per documentation. * BUG FIX: GetData wasn't properly computing the module directory, causing encodings using external modules to fail with GD_E_UNSUPPORTED. * BUG FIX: Metafield records are now properly stored in the format file for Standards Version 8. * BUG FIX: gd_raw_filename() wasn't clearing the Dirfile error before operation, resulting in it failing erroneously in certain situations. Utilities Changes: * BUG FIX: A potential segmentation fault has been patched in dirfile2ascii. |==============================================================================| New in version 0.7.2: Library Changes * If built with modules, the plugin shared objects will now be installed in a separate directory (by default "${libdir}/getdata", but see the --with-module-dir option in ./configure). * BUG FIX: When using modules, a missing plugin no longer results in a lock up the second time an attempt is made to find it. * BUG FIX: GetData now properly processes /INCLUDE directives with absolute paths, as the documentation insists it should. * BUG FIX: gd_add()ing the first raw field in a dirfile to a subfragment no longer results in memory corruption when calling gd_close(). API Changes * If called with GD_CREAT but no encoding specified, gd_include() now will duplicate the encoding of the parent fragment (if any). Miscellaneous * The python module install dir can now be changed by passing --with-python-module-dir to configure. |==============================================================================| New in version 0.7.1: Library Changes * BUG FIX: When the parser fails in a gd_include() call, the internal list of conformant Standards Versions for the loaded dirfile is no longer corrupted. * BUG FIX Performing two consecutive reads of the same field in an ASCII encoded datasources no longer confuses GetData. * BUG FIX: Numerous memory leaks have been patched (mostly pin-holes, although there are a few, rare but egregious ones). API Changes: * The value(s) of a CONST or CARRAY field added with gd_[m]add() is now guaranteed to be zero; previously, it was unspecified. * BUG FIX: Specifying both GD_VERBOSE and GD_IGNORE_DUPS no longer results in spurious "Field code already defined" messages when duplicate fields are encountered. * BUG FIX: Calling gd_delete on a metafield no longer results in a segfault. Bindings Changes: * F77 BUG FIX: A memory leak in GDASCA has been fixed. * Python BUG FIX: The first element of a python list (instead of a NumPy array) is no longer dropped when passed to pygetdata on 64-bit systems. Utilities Changes: * dirfile2ascii now pads reads past the end-of-field. The value used to pad may be specified with '-z', and defaults to 0/NaN. Previously, the value of uninitialized memory was output. * BUG FIX: dirfile2ascii now does what the user intends when presented with cart-before-horse arguments, ie. "dirfile2ascii -e field DIRFILE". Previously this resulted in confusion. * BUG FIX: dirfile2ascii now accepts field conversion '-u', which was documented but overlooked in the argument parser. |==============================================================================| New in version 0.7.0: Dirfile Changes * Dirfile Standards Version 8 has been released. It adds three new field types: DIVIDE, which computes X/Y for vectors X and Y, RECIP, which computes A/X for vector X and scalar A, and CARRAY, which is an array of CONST scalars. A few other changes are listed below. * Like CONST fields, CARRAY elements can be used as parametersin the definition of other fields. Syntax is 'field<n>', where 'field' is the field name and 'n' the element index in the CARRAY (and the angle brackets are literal angle brackets). If the '<n>' is omitted, the first element (numbered 0) is assumed. * Slashes on reserved words are now mandatory, allowing fields with reserved words as names. * The long-deprecated single character data type codes have been removed from Standards Version 8. (They are still accepted by GetData, which handles all previous Standards Versions as well.) * The /ENDIAN directive now takes an optional second parameter. The only allowed value for this second token is "arm", which indicates that double precision floating point data (including double precision complex data) are stored in the ARM middle-endian format. Without this, floating point data are assumed to have the same byte sex as integer data. Library Changes * GetData, including its bindings, is now supported under MacOS X, Cygwin, and Win32 using MinGW. In the case of MinGW, this includes linking against the Microsoft C Runtime, which isn't POSIX compliant. Users should excercise caution when writing to dirfiles in this case. * GetData can now be used on ARM processors. As a side-effect, GetData can now read and write the middle-ended floating point format used by older ARM processors (on any processor, via endianness conversion). * Some changes have been made to the parser. It now operates in one of two modes: pedantic mode, which adheres strictly to one particular Dirfile Standards Version, and permissive mode (the default) which is more lenient, as the old parser was. Encountering a /VERSION directive will switch the parser from permissive to pedantic mode unless told not to (see GD_PERMISSIVE below), and will change the particular Standards Version to which pedantic mode is adhering. * As a result of the previous change, the Standards compliance of the parser in strict mode has been greatly increased. This affects allowed characters in field names, and field name lengths. The existance or lack thereof of the implicit FILEFRAM field (an alias for INDEX) is also affected. * Since Standards Versions 4 and earlier were never codified, we've made some assumptions as to their behaviour in certain undocumented situtations. Most noticably, they still prohibit ASCII control codes (bytes < 0x20) and '/' in field names. We also assume these dirfiles have native byte sex, even though some early GetData behaviour implied only little-ended data was acceptable. * Every Dirfile object now records its current Standards Version, which affects functions such as gd_add_spec(). The Version will start out as the value of the last /VERSION directive encountered by the parser, or else the latest compliant Standards Version. It can be changed (see below). * When writing metadata to disk, fragments will be written according to the current Standards Version of the dirfile object, rather than always using the latest version, as before. * The C library now sports an "ANSI C" mode, which allows compilation of GetData without a C99-compliant compiler. Some functionality may be lost, most prominently, but unsurprisingly, the default (C99) API. * The artificial maximum line length of 4096 bytes for format metadata has been removed. The maximum line length is now 2**31 bytes on 32-bit systems, and more on 64-bit systems. This also has the side-effect of removing the same length limit which had been applied to field names. * LINTERP tables are no longer required to be sorted. The library will sort them, if needed. As a side-effect of this, tables are no longer read twice when loading, leading to potential speed-up. * BUG FIX: The library wasn't properly checking that the second and higher input fields in LINCOM and MULTIPLY fields were, in fact, vectors, leading to possible segfaults. * BUG FIX: A memory leak associated with modifying LINCOM metadata has been fixed. * BUG FIX: Using a complex valued vector as the second input field in a MULTIPLY wouldn't result in the field being internally flagged as complex, leading to loss of the imaginary part in certain situtaitons. * BUG FIX: Trying to write to a LINTERP via a table which isn't monotonic now results in error. Previously, this was allowed, with arbitrary data stored to disk. * BUG FIX: On encountering a line longer than it was prepared to deal with, the parser used to get very confused, potentially resulting in bizarre behaviour. On the off chance such a line is encountered, GetData will now raise GD_E_LINE_TOO_LONG in these cases. (And, since the maxmium line length has been increased to at least 2**31 characters, this should only occur in pathological situations.) * BUG FIX: Deleting a metafield was not being communicated to its parent, resulting in differing opinions within the library as to the deleted field's exsitence. API Changes * Due to namespace conflicts with the MacOS X System Library (which contains the C Standard Library), a wholesale renaming of public symbols has been performed. All public functions, and data types now begin with 'gd_'. All public preprocessor macros now begin with 'GD_'. Symbol renaming has occurred in the following manner: - functions which started with 'put' simply prefix 'gd_' to their name. So put_constant() becomes gd_put_constant(). - functions which started with 'get' replace 'get' with 'gd', except those functions with a corresponding 'put' function; these simply prefix 'gd_'. So, get_constants() becomes gd_constants(), but get_constant() becomes gd_get_constant(). - functions which started with 'dirfile' replace 'dirfile' with 'gd', except for dirfilename(), which becomes gd_dirfilename(). So, dirfile_alter_encoding() becomes gd_alter_encoding(). - macros which started with 'GETDATA_' now start with 'GD_'. Those that started with 'NO_GETDATA_' now start with 'GD_NO_'. So GETDATA_LEGACY_API becomes GD_LEGACY_API and NO_GETDATA_LEGACY_API becomes GD_NO_LEGACY_API. * The above renaming rules result in one gd_ namespace clash. As a result, get_reference() has been removed completely. Calls will have to be changed to use gd_reference(), formerly dirfile_reference(). * Furthermore, the function dirfile_protect() is now gd_alter_protection() to match the naming of other fragment metadata altering functions. * To ease transition to the new namespace, defining GD_FUNCTION_ALIASES before including getdata.h will create a bunch of preprocessor macros which map the old names to the new. * The meaning of the GD_PEDANTIC flag to gd_[cb]open() has changed. It now forces the parser to start off in pedantic mode (see above), following the latest Standards Version, rather than the default permissive mode. This is a subtle change, and in most cases the effects of GD_PEDANTIC will be the same as they were before. * A new dirfile flag, GD_PERMISSIVE, has been added. Passing this to gd_[cb]open() will prohibit the parser from switching into pedantic mode when it encounters a /VERSION directive. This flag is needed to read dirfiles which claim to adhere to the Standards via a /VERSION directive, but contain invalid syntax nonetheless. * The current Standards Version of an open dirfile can be set or queried by calling the new function gd_dirfile_standards(). NB: this only affects the open dirfile, not the metadata stored on disk. * A new function, gd_rewrite_fragment() will force GetData to write the specified fragment to disk, even if no metadata in the fragment has changed. * Two new functions, gd_bof() and gd_eof() can be used to find the sample number of the beginning- or end-of-field for a given field. Notably, these can be used to calculate the amount of raw data on disk for a given field. * The new gd_invalid_dirfile() function will return a newly created, invalid dirfile. Primarily useful to callers as a "null dirfile" placeholder. * GD_E_OPEN_INCLUDE has been renamed to GD_E_OPEN_FRAGMENT, but the former symbol remains as an alias. * Two new bitflags to gd_cbopen and gd_open: GD_ARM_ENDIAN and GD_NOT_ARM_ENDIAN allow specifying the default ordering of double precision data. These flags may also be used with gd_alter_endianness() and will be returned by gd_endianness(). On all platforms except for middle-endian ARMs, GD_NOT_ARM_ENDIAN equals zero and may be omitted. * Where gd_flush() and gd_metaflush() in the past raised GD_E_OPEN_INCLUDE on I/O error, they now raise the new GD_FLUSH. * All functions now raise GD_E_DIMENSION when encountering a scalar field when expecting a vector. In the past, the error value returned was different for different functions. * getdata.h now wraps itself in an extern "C" block if included by a C++ compiler. * If passed a NULL pointer, gd_error_string() will return a newly malloc'd buffer long enough to hold the entire string. It should be free'd by the caller. * The parser data passed to the callback function now includes the length of the buffer. The parser also permits the callback to assign a new pointer to the 'line' element of the parser data if the buffer passed in is too small. * gd_metaflush() now fails and raises GD_E_ACCMODE if called on a read-only dirfile. (Previously it would successfully do nothing.) Legacy API Changes * In the legacy format struct, DIVIDE fields are listed as MULTIPLYs and RECIP fields are listed as LINCOMs, with the dividend stored in m[0]. * BUG FIX: In previous versions, attempting to access an invalid dirfile (anything that would cause gd_open to fail) resulted in leaked memory. This leak has been plugged. * BUG FIX: A segfault involving the reporting of POLYNOM fields has been fixed in GetFormat(). Bindings * Bindings for the functionality introduced into 0.7.0 have been added. * F77: GDPROT has been renamed GDAPRT to mirror the renaming of gd_alter_protection(). * F77: GDGTCO and GDPTCO no longer return an indicator of success. * F77: The signatues of GDGSCA and GDASCA have changed to return/take the scalar index as well. * F95: For consistency sake, the Fortran 95 bindings have undergone the same renaming so they have the same name as their C counterparts. All functions are now preceded by 'fgd_'. * F95: The fgd_get_constant_* and fgd_put_constant_* procedures are now subroutines, not functions. * C++: Const member functions are now flagged as such. * C++: The len parameter to Dirfile::ErrorString is now ignored. * C++: dirfiles are now opened read-only by default. * IDL: The IDL bindings have also followed suit in the great renaming. The exception to this is GETDATA_CONSTANTS(), which is not renamed. * IDL: Various constants defined in getdata.h but not used by the IDL bindings have been removed from the structure returned by GETDATA_CONSTANTS(). * Python: dirfile.getdata() now raises ValueError if neither num_frames nor num_samples are specified. In the past, it would happily return nothing in this case. * Python: dirfiles are now opened read-only by default. * C++ BUG FIX: Entry::Scalar() no longer rejects valid values of index. * IDL BUG FIX: A memory impropriety involving keyword arguments. This bug manifested by rejecting valid keyword arguments on 64-bit systems, but may have had other, subtle effects on 32-bit systems as well. * Python BUG FIX: A non-literal phase shift is now properly reported. * Python BUG FIX: Calling Dirfile.discard() or Dirfile.close() no longer results in a segfault. Miscellaneous * The --disable-checkdirfile option has been removed from ./configure. It is now always installed. * A utility, dirfile2ascii, is now installed alongside checkdirfile. This utility converts all or part of a dirfile into ASCII text. dirfile2ascii was written by Matthew Truch. * The thoroughness of the checks done by checkdirfile have increased. It now reports format syntax errors, Dirfile Standards compliance, problems with field definitions (such as missing input fields), and the size of the dirfile. |==============================================================================| New in version 0.6.3: Bindings * A memory leak has been plugged in the Python bindings manifesting in calls to dirfile.getdata() returning a NumPy array. In previous versions, the memory used by the returned array to hold the data was not reclaimed by GC. |==============================================================================| New in version 0.6.2: Library Changes * Attempting to get the number of frames from an ASCII file no longer fails the second time. |==============================================================================| New in version 0.6.1: API Changes * The getdata.h header no longer includes complex.h explicitly. Legacy API Changes * A potential segfault relating to error reporting in the legacy API has been fixed. Bindings * C++ BUG FIX: Several bugs preventing compilation of the C++ test-suite under Fedora 13 have been fixed. * IDL BUG FIX: Several segfaults in the IDL bindings have been eradicated. Miscellaneous * Libtool has been upgraded to 2.2.6b, which provides proper support for Fortran-9x. The outdated, internal libltdl has been removed. Building modules now requires an installed libltdl. |==============================================================================| New in version 0.6.0: License * The GetData library and its bindings are now distributed under the GNU Lesser Public License, version 2.1 or later. Dirfile Changes * GetData now support Dirfile Standards Version 7. Standards Version 7 adds complex data types, a signed bitfield (SBIT), a polynomial derived field (POLYNOM), and other features detailed below. * Metafields can now be specified using a normal format specification line and their full (slashed) field code. * Field codes can now contain a "representation suffix", which allows specifying a complex norm used to convert complex valued data into purely real data. * The n_fields parameter in a LINCOM specification is now optional. * A new encoding scheme which supports LZMA compressed data using the .xz container format has been added. * Look-up tables may contain a complex y-value. This prohibits writing to the associated LINTERP field. Library Changes * The field parameters spf (RAW), bitnum and numbits (BIT and SBIT) are now restricted to 16-bit numbers, which should be more than enough. The public API uses gd_spf_t and gd_bit_t for these quantities. * The shift field parameter is now a 64-bit integer type, called gd_shift_t. * The dirfile flags, including encoding and endianness symbols are now explicitly long ints. Previously these quantities mixed long int with int arbitrarily. This affects the public API. * The parser callback has received a new, API breaking signature, which should hopefully reduce the amount of API breakage in the future. It is also now possible for the caller to pass data through GetData to the callback, if desired. * Computation of derived fields can now handle complex valued inputs, and computation will occur in the complex plane when required. * The computation of LINCOM fields has been re-written and is now ~20% faster for LINCOMs with 2 or 3 input fields. (No change for LINCOMs of 1 field.) * A new open flag, GD_PRETTY_PRINT, tells the library to attempt to write a nicer looking format file. What this specifically means, isn't part of the public API and shouldn't be relied on in portable code. * BUG FIX: dirfile_madd_spec() and dirfile_add_spec() didn't properly flag the fragments they modified as dirty, leading to possible loss of metadata. * BUG FIX: calling get_nframes on a bzip2 encoded dirfile would report the wrong dirfile length. * BUG FIX: LINTERP tables are now closed after loading, resolving a file descriptor leak of great age (ie. pre-0.3.0). * BUG FIX: When re-writing a format file fragment containing fields with CONST scalar field parameters, GetData no longer replaces the CONST field codes in the field specification lines with the value of the CONST field. * BUG FIX: when moving a field with dirfile_move(), the fragment index in the entry objects of metafields defined for the field were not updated. (The metafields were placed in the correct fragment when the metadata was flushed to disk, despite this.) * BUG FIX: Calling getdata() or putdata() on 64-bit architectures in certain situations involving a non-zero frameoffset no longer results in bizarrity. * BUG FIX: A memory leak associated with RAW field metadata has been fixed. * BUG FIX: 64-bit integer literals in the format file are no longer truncated to double precision when read. API Changes * This release breaks ABI compatibility and, to a lesser extent, API compatibility. The SOVERSION of the library has been incremented accordingly. * A C-89 API will be declared by getdata.h if GETDATA_C89_API is defined before inclusion. If this symbol is not defined, the C API defined will include C-99 conforming complex types, and getdata.h will include complex.h if `complex' has not been defined before inclusion. * Due to the new, simple way of specifying META fields in Standards Version 7, dirfile_add_spec() and dirfile_alter_spec() can be used to modify metafields. dirfile_madd_spec() and dirfile_malter_spec() remain as well. * An array containing the CONST scalar field codes used when non-literal parameters are used in the specification of various different fields has been added to the gd_entry_t object. As a side-effect of this, dirfile_add(), dirfile_alter_entry(), and dirfile_madd() can be used to manipulate non-literal field parameters. * A function, get_native_type(), now exists which returns the underlying data type of a specified field code. * A function, get_framenum(), is now available to perform a "reverse look-up" on a field: given a data value, it reports the frame number where the field has that value. The field must be monotonic. * A function, dirfile_validate(), now exists which can be used to check the validity of a field code before use. * Two new error codes have been added: GD_E_DOMAIN, potentially returned by get_framenum(), and GD_E_BAD_REPR, indicating an unrecognised representation suffix, or an attempt to write to a representation. * A new syntax error suberror code has been added: GD_E_FORMAT_LITERAL, which indicates a syntax error in a complex literal number. * BUG FIX: On success, dirfilename(), dirfile_reference(), and get_reference() didn't change the error code to GD_E_OK, resulting in spurious error codes from these functions. * BUG FIX: dirfile_madd_string() and dirfile_madd_const() now don't fail erroneously by reporting GD_E_BAD_CODE. * BUG FIX: error strings relating to GD_E_DELETE error codes now report the proper error information. * BUG FIX: the list returned by get_mstrings() is now properly NULL terminated. * BUG FIX: the entry->table member now reports the proper path to the LUT. (That is, the path stored in the format file.) Previously it incorrectly reported a path relative to the base dirfile directory. Legacy API Changes * Because they would otherwise be unreported, in the structure returned by GetFormat(), POLYNOM entries are reported as LINCOM entries, by discarding higher order terms. Similarly, SBIT entries are reported as BIT entries. Bindings * Bindings for Python and the Interactive Data Language (IDL) have been added. * Bindings for the functionality introduced into 0.6.0 have been added. * C++: The missing bindings for dirfilename(), get_nvectors(), and get_fragment_index() have been added. * C++: Empty entry class constructors have been added which allow delayed specification of field metadata. * C++: The dirfile.h header now includes all other C++ headers, and is now the only header required to be included in applications. (The other headers can still be included, with no ill effects.) * All bindings have a much expanded test suite, which has resulted in the discovery of many bugs (subsequently fixed). * F77: The callback function is now dirfile-specific, as it is in the C API. * C++ BUG FIX: Entry class constructors now properly set the field name for metafields. * C++ BUG FIX: Fragment::SetEncoding() now actually does what it advertises, instead of doing nothing. * C++ BUG FIX: The recode argument to various functions is now optional and defaults to zero, as the documentation already indicated. * C++ BUG FIX: dirfile_close() was not being called by the Dirifle destructor. * F77 BUG FIX: a NULL C string returned from the C API now returns an empty string, rather than causing a segfault. * F77 BUG FIX: attempting to call another F77 function before calling GDCOPN or GDOPEN no longer results in a segfault. * F77 BUG FIX: passing an out-of-range dirfile unit no longer results in undefined behaviour. * F77 BUG FIX: the last character of a string returned by the bindings is no longer deleted. * F77 BUG FIX: string lengths now report the correct length. * F77 BUG FIX: passing dirfile unit 0 to GDCLOS or GDDSCD no longer corrupts the bindings. * F77 BUG FIX: GDFLDN no longer accepts indices less than one. * F77 BUG FIX: GDESTR now space pads its output string, rather than filling the remainder of the string with garbage. * F77 BUG FIX: The get_entry() bindings, GDGExx no longer segfault on dirfile error. * F77 BUG FIX: GDGTST and GDPTST now report the FORTRAN string length, which is one less than the C API would report, due to the lack of a terminating null. * F95 BUG FIX: Attempting to retrieve a PHASE entry with fget_entry() now works. * F95 BUG FIX: Several routines which were named fdrifile_<foo> are now properly spelled. Miscellaneous * All bindings can now be disabled by passing --disable-bindings to ./configure. |==============================================================================| New in version 0.5.0: Dirfile Changes * Support for two new encoding schemes has been added which handle bzip2 and gzip compression. Like the slim encoding, the bzip and gzip encoding schemes currently do not support writing, but do allow reading dirfile data compressed with the standard gzip and bzip2 utilities. Reading compressed data is unsurprisingly slow. Library Changes * Encoding schemes relying on external libraries (slim, gzip, bzip2) may now be built into stand-alone library modules which will be loaded, as needed, at runtime. GetData will fail gracefully if modules are missing. See the README for full details. * BUG FIX: Writing metadata to disc now preserves the permissions of the format file fragments which are changed. * BUG FIX: Format files without a line feed character at the end of the file no longer cause the parser to segfault. * BUG FIX: putdata() now reports the correct number of samples written for ASCII encoded files. * BUG FIX: GetData no longer inserts unnecessary "/./" elements into the paths it reports. API Changes * The caller can now register a callback function with a DIRFILE by opening the dirfile with dirfile_cbopen instead of dirfile_open. This callback function will be called by GetData whenever the format file parser encounters a syntax error. The callback function can be used by the caller to either correct the syntax error, or else tell GetData whether to ignore the line or not. The callback function may be later modified by calling dirfile_parser_callback. * A fragment may be removed from a dirfile by calling dirfile_uninclude. * The pathname of the dirfile may be retrieved by calling dirfilename. * The reference field for the dirfile may be set or retrieved by calling dirfile_reference. * Fragment metadata may be queried or modified by calling: - get_encoding, dirfile_alter_encoding - get_endianness, dirfile_alter_endianness - get_frameoffset, dirfile_alter_frameoffset - get_protection, dirfile_protect - get_parent_fragment * Various functions now exist to modify field metadata: - dirfile_alter_entry, dirfile_alter_<field-type>, dirfile_alter_spec, dirfile_malter_spec * A field may be moved to a different format file fragment using dirfile_move. * A field may be renamed by using dirfile_rename. * A field may be removed from the dirfile by calling dirfile_delete. * The type or fragment index of a field may be retrieved by calling get_entry_type or get_fragment_index, respectively. * The pathname of a raw field may be obtained from a call to get_raw_filename. * A DIRFILE may be deallocated without saving modified metadata by calling dirfile_discard. * A new flag, GD_IGNORE_DUPS, may be passed to dirfile_open to tell the parser to ignore duplicate field specifications in the format files. This is really only useful identically duplicate specifications, since there is no indication of which of the duplicates is honoured. Explicit control can be obtained by handling this inside a caller supplied callback function. Bindings: * All functions in the Fortran 77 bindings have been completely renamed from GDFxxx to GDxxxx to provide a larger namespace for our use. * Fortran 77, Fortran 95, and C++ bindings have been updated for the latest API changes. * BUG FIX: Fortran 77 functions which return character strings no longer corrupt memory as a side-effect of operation. This also affected the Fortran 95 bindings. Miscellaneous: * BUG FIX: The dirifle_madd_bit(3) manual page has been corrected to show the correct order or parameters for all the dirfile_madd_<field_type> functions. |==============================================================================| New in version 0.4.2: Library Changes * BUG FIX: The default protection level of format file fragments is now properly set to "none". Reported by Brendan Crill. * BUG FIX: getdata() now reports the correct number of samples read for slim and ASCII encoded files. Reported by Adam Hincks. * BUG FIX: A segmentation fault only encountered when reading slim encoded data has been fixed in dirfile_flush(). Legacy API Changes * Several fixes have been made to better re-create the legacy API: - the return value of GetFormat is no longer marked const (although it should be considered so). - a symbolic link getdata_struct.h -> getdata.h is created when the headers are installed, but only if the legacy API is present in the library. - when included with a C++ compiler, the legacy function prototypes are wrapped in an extern "C" block. (The new API functions are not.) |==============================================================================| New in version 0.4.1: Library Changes * BUG FIX: Adding an ASCII encoded RAW field no longer creates an empty, unencoded binary file. * BUG FIX: A few minor memory leaks have been patched. Most of these were the result of insufficient clean up in dirfile_close(). * As an exception to the Standards, the full stop character '.' is once again permitted in field names. This is required by BLAST. Instead, field names are prohibited from ending with the known encoding extensions. The Standards still prohibit the full stop character in field names, and the GD_PEDANTIC flag will disable this exception. Furthermore, fields may not be added via GetData which contain a full stop character. * Some minor speed improvements have been made to the format file parser resulting in a ~30% decrease in parsing time. |==============================================================================| New in version 0.4.0: Dirfile Changes * GetData now supports Dirfile Standards Version 6. Standards Version 6 adds numerical (CONST) and string (STRING) scalar fields to the dirfile, as well as other features outlined below. * CONST names can now appear as parameters in field specifications in certain places in lieu of a literal number. * The tokeniser has been re-written. Any sequence of non-NUL bytes can now form a valid token. Field codes may not have ASCII control characters or the "reserved characters" &, /, ;, <, >, |, . but may contain any other characters (including whitespace). * Subordinate fields may now be attached to fields. These subfields are defined with the META directive, and referenced in most cases as "<parent-field>/<subfield>". * Binary files in dirfiles may now be "encoded". In addition to raw (unencoded) files, two encodings are currently supported: - ASCII encoding (a simple proof-of-functionality encoding), and - Slimlib encoding (a compression library used by ACT). Encoding schemes are fragment-local, although they are inherited from parent fragments. * Endianness is now also fragment-local, meaning different endiannesses can co-exist in the same dirfile (so long as the fields are defined in different format file fragments), and GetData will do the Right Thing. * "FILEFRAM" is no-longer supported as an alias for "INDEX". This affects GetData's implementation of all Standards Versions. Code that made use of FILEFRAM will have to be updated to use INDEX instead. * The reference field, previously the first RAW field in the format file, may now be specified using the REFERENCE directive. The reference field is the field that is looked at when get_nframes() is called. This is important to programs like kst which support streaming dirfiles. * Portions (or all) of a dirfile's data and metadata can be protected from change by specifying the PROTECT directive. This protection is "advisory", ie. while GetData will respect it in all cases, don't count on the PROTECT directive to ensure data integrity. Library Changes * INDEX is now a normal field. It appears in the count/list functions. Attempts to write to INDEX will fail. * The GD_E_EMPTY error code has been removed: it is no longer an error to query a dirfile containing no RAW fields. * The presence of two fields in the dirfile with the same name is now detected, and will cause a syntax error when parsing the format file. Previously, such things were allowed, but only one of the synonym fields could ever be queried. (Which field was returned was arbitrary.) * Field code look-ups for input fields are now cached, which should result in slightly better performance from the library. API Changes * Fields may now be added to dirfiles in a number of different ways: - by passing an gd_entry_t to dirfile_add() - by passing a field specification line to dirfile_add_spec() - by passing field parameters to one of the dirfile_add_<foo>() functions. * Whole other format file fragments may also be added to the dirfile by calling dirfile_include(). * A function is now present (dirfile_metaflush()) to flush metadata changes to disk (by re-writing format file fragments). dirfile_flush() and dirfile_close() will also flush metadata, if needed. * STRING and CONST values can be retrieved/set by calling (get,put)_string() and (get,put)_constant(). (get,put)data() are only for vector type fields. * META fields can be queried/set like normal fields using the get/put functions and their full (slashed) field code. * In addition to get_nfields() and get_field_list(), there are now corresponding functions that provide lists/counts of vectors (get_vector_list()/get_nvectors()), particular field types (get_field_list_by_type()/get_nfields_by_type()), as well as functions that provide lists of string values (get_string_values()) and constant values (get_const_values()). * Analogous functions for the add, list, and counting functions exist for META fields, as well. * Extra flags have been added to dirfile_open() to permit indicating the encoding type, if not specified in the dirfile itself. * DIRFILE struct members and gd_entry_t private members are now completely hidden from the public interface. Where previously callers could query dirfile->error to check for an error, they must now call get_error(dirfile). This change was made to reduce unintentional ABI breakage when modifying internal library properties. * GD_VERBOSE has been added to the list of available dirfile_open() flags. If this flag is specified, GetData will write errors to stderr as encountered. Legacy API Changes * Error codes which cannot be returned by the legacy API might not have a corresponding string in GD_ERROR_CODES[]. Instead, these entries will simply be the NULL pointer. * No facilities exist in the legacy API to set or query CONST or STRING fields. However, META fields of vector type can be queried/set using GetData() and PutData(), as in the new API. |==============================================================================| New in version 0.3.1: Legacy API Changes * BUG FIX: Dirfiles are now opened in read-only mode, unless instantiated via PutData(), allowing GetData() calls on read-only dirfiles. If PutData() is called on a dirfile previously opened read-only, it will be re-opened in read-write mode. Bindings * The C++ bindings, formerly called libdirfile, are now called libgetdata++ to be more explicit about what this library is. Miscellaneous * The package now includes pkg-config support for libgetdata. |==============================================================================| New in version 0.3.0: Dirfile Changes * GetData now supports Dirfile Standards Version 5 which includes support for signed 8-bit, and signed and unsigned 64-bit integer types. * As part of Standards Version 5, the restriction on field name length has been removed. (The filesystem will impose an effective limit on RAW fields of a few hundred characters, and format file lines are limited to several thousand, limiting derived field names.) * The library can now convert between big and little endiannesses. An optional directive, ENDIAN, added in Standards Version 5, is available to specify the byte-sex of a dirfile. API Changes * There is a new interface which fixes issues with thread safety and largefile support in the old interface. The old interface (referred to as the "legacy API") is still supported, but doesn't fully implement Dirfile Standards Version 5. See the README for full details. * putdata now respects FRAMEOFFSET. * putdata can now write to PHASE fields, and multi-bit BIT fields. * Some error codes have been renamed, and others removed or added, in order to regularise error codes between getdata and putdata in the sundry versions. Furthermore, the underlying values of some of these codes have changed (notably excluding GD_E_OK, which is guaranteed to be zero). Changes include: - GD_E_OPEN_FORMAT is now called GD_E_OPEN - GD_E_BAD_RETURN_TYPE is now called GD_E_BAD_TYPE - GD_E_NO_RAW_FIELDS is now called GD_E_EMPTY - PD_E_MULT_LINCOM is now called GD_E_BAD_PUT_FIELD - GD_E_OPEN_RAWFIELD and PD_E_OPEN RAWFIELD are now both represented by GD_E_RAW_IO - PD_E_BAD_CODE is now handled by GD_E_BAD_CODE - GD_E_FIELD, GD_E_SIZE_MISMATCH, ENDIAN_ERROR, CLOSE_ERROR are no longer applicable and have been removed - PD_E_CLOSE_RDONLY, PD_E_WRITE_LOCK, PD_E_FLOCK_ALLOC, which were were defined in the header but never used, have been removed - GD_E_TRUNC, GD_E_CREAT, GD_E_BAD_DIRFILE, GD_E_RANGE and GD_E_ACCMODE are new This affects the legacy API. Legacy API Changes * The legacy API has been marked deprecated. * Error codes have changed per the description above. * Only the public members of FormatType are now initialised by GetFormat. Bindings * Added bindings for C++ (libdirfile), Fortran 77 (libfgetdata), and Fortran 95 (libf95getdata) Miscellaneous * A rudimentary, but thorough, test-suite has been made. |