| stdbool.h | stdbool.h | |||
|---|---|---|---|---|
| /* DO NOT EDIT! GENERATED AUTOMATICALLY! */ | /* DO NOT EDIT! GENERATED AUTOMATICALLY! */ | |||
| #if !defined _GL_STDBOOL_H | #if !defined _GL_STDBOOL_H | |||
| #if (__GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 95)) | #if (__GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 95)) | |||
| #include <stdbool.h> | #include <stdbool.h> | |||
| #else | #else | |||
| /* Copyright (C) 2001-2003, 2006-2009 Free Software Foundation, Inc. | ||||
| Written by Bruno Haible <haible@clisp.cons.org>, 2001. | ||||
| This program is free software; you can redistribute it and/or modify | ||||
| it under the terms of the GNU General Public License as published by | ||||
| the Free Software Foundation; either version 2, or (at your option) | ||||
| any later version. | ||||
| This program is distributed in the hope that it will be useful, | ||||
| but WITHOUT ANY WARRANTY; without even the implied warranty of | ||||
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||||
| GNU General Public License for more details. | ||||
| You should have received a copy of the GNU General Public License | ||||
| along with this program; if not, write to the Free Software Foundation, | ||||
| Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ | ||||
| #ifndef _UNISTRING_STDBOOL_H | ||||
| #define _UNISTRING_STDBOOL_H | ||||
| /* ISO C 99 <stdbool.h> for platforms that lack it. */ | ||||
| /* Usage suggestions: | ||||
| Programs that use <stdbool.h> should be aware of some limitations | ||||
| and standards compliance issues. | ||||
| Standards compliance: | ||||
| - <stdbool.h> must be #included before 'bool', 'false', 'true' | ||||
| can be used. | ||||
| - You cannot assume that sizeof (bool) == 1. | ||||
| - Programs should not undefine the macros bool, true, and false, | ||||
| as C99 lists that as an "obsolescent feature". | ||||
| Limitations of this substitute, when used in a C89 environment: | ||||
| - <stdbool.h> must be #included before the '_Bool' type can be used. | ||||
| - You cannot assume that _Bool is a typedef; it might be a macro. | ||||
| - Bit-fields of type 'bool' are not supported. Portable code | ||||
| should use 'unsigned int foo : 1;' rather than 'bool foo : 1;'. | ||||
| - In C99, casts and automatic conversions to '_Bool' or 'bool' are | ||||
| performed in such a way that every nonzero value gets converted | ||||
| to 'true', and zero gets converted to 'false'. This doesn't work | ||||
| with this substitute. With this substitute, only the values 0 and | ||||
| 1 | ||||
| give the expected result when converted to _Bool' or 'bool'. | ||||
| Also, it is suggested that programs use 'bool' rather than '_Bool'; | ||||
| this isn't required, but 'bool' is more common. */ | ||||
| /* 7.16. Boolean type and values */ | ||||
| /* For the sake of symbolic names in gdb, we define true and false as | ||||
| enum constants, not only as macros. | ||||
| It is tempting to write | ||||
| typedef enum { false = 0, true = 1 } _Bool; | ||||
| so that gdb prints values of type 'bool' symbolically. But if we do | ||||
| this, values of type '_Bool' may promote to 'int' or 'unsigned int' | ||||
| (see ISO C 99 6.7.2.2.(4)); however, '_Bool' must promote to 'int' | ||||
| (see ISO C 99 6.3.1.1.(2)). So we add a negative value to the | ||||
| enum; this ensures that '_Bool' promotes to 'int'. */ | ||||
| #if defined __cplusplus | ||||
| /* Assume the compiler has 'bool' and '_Bool'. */ | ||||
| #else | ||||
| /* If @HAVE__BOOL@: | ||||
| Some HP-UX cc and AIX IBM C compiler versions have compiler bugs wh | ||||
| en | ||||
| the built-in _Bool type is used. See | ||||
| http://gcc.gnu.org/ml/gcc-patches/2003-12/msg02303.html | ||||
| http://lists.gnu.org/archive/html/bug-coreutils/2005-11/msg00161. | ||||
| html | ||||
| http://lists.gnu.org/archive/html/bug-coreutils/2005-10/msg00086. | ||||
| html | ||||
| Similar bugs are likely with other compilers as well; this file | ||||
| wouldn't be used if <stdbool.h> was working. | ||||
| So we override the _Bool type. | ||||
| If !@HAVE__BOOL@: | ||||
| Need to define _Bool ourselves. As 'signed char' or as an enum type | ||||
| ? | ||||
| Use of a typedef, with SunPRO C, leads to a stupid | ||||
| "warning: _Bool is a keyword in ISO C99". | ||||
| Use of an enum type, with IRIX cc, leads to a stupid | ||||
| "warning(1185): enumerated type mixed with another type". | ||||
| Even the existence of an enum type, without a typedef, | ||||
| "Invalid enumerator. (badenum)" with HP-UX cc on Tru64. | ||||
| The only benefit of the enum, debuggability, is not important | ||||
| with these compilers. So use 'signed char' and no enum. */ | ||||
| # define _Bool signed char | ||||
| #endif | ||||
| #define bool _Bool | ||||
| /* The other macros must be usable in preprocessor directives. */ | ||||
| #define false 0 | ||||
| #define true 1 | ||||
| #define __bool_true_false_are_defined 1 | ||||
| #endif /* _UNISTRING_STDBOOL_H */ | ||||
| #endif | #endif | |||
| #endif | #endif | |||
| End of changes. 1 change blocks. | ||||
| 0 lines changed or deleted | 103 lines changed or added | |||