minix/include/assert.h
2009-11-09 10:26:00 +00:00

39 lines
1 KiB
C

/* The <assert.h> header contains a macro called "assert" that allows
* programmers to put assertions in the code. These assertions can be verified
* at run time. If an assertion fails, an error message is printed and the
* program aborts.
* Assertion checking can be disabled by adding the statement
*
* #define NDEBUG
*
* to the program before the
*
* #include <assert.h>
*
* statement.
*/
#undef assert
#ifndef _ANSI_H
#include <ansi.h>
#endif
#ifdef NDEBUG
/* Debugging disabled -- do not evaluate assertions. */
#define assert(expr) ((void) 0)
#else
/* Debugging enabled -- verify assertions at run time. */
#ifdef _ANSI
#define __makestr(x) # x
#define __xstr(x) __makestr(x)
_PROTOTYPE( void __bad_assertion, (const char *_mess) );
#define assert(expr) ((expr)? (void)0 : \
__bad_assertion("Assertion \"" #expr \
"\" failed, file " __xstr(__FILE__) \
", line " __xstr(__LINE__) "\n"))
#else
#define assert(expr) ((void) ((expr) ? 0 : __assert( __FILE__, __LINE__)))
#endif /* _ANSI */
#endif