assert.h
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上传日期:2009-04-28
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- /* Copyright (C) 1991,1992,1994-2001,2003,2004 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
- The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public
- License as published by the Free Software Foundation; either
- version 2.1 of the License, or (at your option) any later version.
- The GNU C Library 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
- Lesser General Public License for more details.
- You should have received a copy of the GNU Lesser General Public
- License along with the GNU C Library; if not, write to the Free
- Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
- 02111-1307 USA. */
- /*
- * ISO C99 Standard: 7.2 Diagnostics <assert.h>
- */
- #ifdef _ASSERT_H
- # undef _ASSERT_H
- # undef assert
- # undef __ASSERT_VOID_CAST
- # ifdef __USE_GNU
- # undef assert_perror
- # endif
- #endif /* assert.h */
- #define _ASSERT_H 1
- #include <features.h>
- #if defined __cplusplus && __GNUC_PREREQ (2,95)
- # define __ASSERT_VOID_CAST static_cast<void>
- #else
- # define __ASSERT_VOID_CAST (void)
- #endif
- /* void assert (int expression);
- If NDEBUG is defined, do nothing.
- If not, and EXPRESSION is zero, print an error message and abort. */
- #ifdef NDEBUG
- # define assert(expr) (__ASSERT_VOID_CAST (0))
- /* void assert_perror (int errnum);
- If NDEBUG is defined, do nothing. If not, and ERRNUM is not zero, print an
- error message with the error text for ERRNUM and abort.
- (This is a GNU extension.) */
- # ifdef __USE_GNU
- # define assert_perror(errnum) (__ASSERT_VOID_CAST (0))
- # endif
- #else /* Not NDEBUG. */
- __BEGIN_DECLS
- /* This prints an "Assertion failed" message and aborts. */
- extern void __assert_fail (__const char *__assertion, __const char *__file,
- unsigned int __line, __const char *__function)
- __THROW __attribute__ ((__noreturn__));
- /* Likewise, but prints the error text for ERRNUM. */
- extern void __assert_perror_fail (int __errnum, __const char *__file,
- unsigned int __line,
- __const char *__function)
- __THROW __attribute__ ((__noreturn__));
- /* The following is not at all used here but needed for standard
- compliance. */
- extern void __assert (const char *__assertion, const char *__file, int __line)
- __THROW __attribute__ ((__noreturn__));
- __END_DECLS
- # define assert(expr)
- (__ASSERT_VOID_CAST ((expr) ? 0 :
- (__assert_fail (__STRING(expr), __FILE__, __LINE__,
- __ASSERT_FUNCTION), 0)))
- # ifdef __USE_GNU
- # define assert_perror(errnum)
- (__ASSERT_VOID_CAST (!(errnum) ? 0 :
- (__assert_perror_fail ((errnum), __FILE__, __LINE__,
- __ASSERT_FUNCTION), 0)))
- # endif
- /* Version 2.4 and later of GCC define a magical variable `__PRETTY_FUNCTION__'
- which contains the name of the function currently being defined.
- This is broken in G++ before version 2.6.
- C9x has a similar variable called __func__, but prefer the GCC one since
- it demangles C++ function names. */
- # if defined __cplusplus ? __GNUC_PREREQ (2, 6) : __GNUC_PREREQ (2, 4)
- # define __ASSERT_FUNCTION __PRETTY_FUNCTION__
- # else
- # if defined __STDC_VERSION__ && __STDC_VERSION__ >= 199901L
- # define __ASSERT_FUNCTION __func__
- # else
- # define __ASSERT_FUNCTION ((__const char *) 0)
- # endif
- # endif
- #endif /* NDEBUG. */