Last change
on this file since 11 was 4, checked in by Mattia Monga, 14 years ago |
Importazione sorgenti libro
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File size:
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[4] | 1 | /* The <assert.h> header contains a macro called "assert" that allows
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| 2 | * programmers to put assertions in the code. These assertions can be verified
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| 3 | * at run time. If an assertion fails, an error message is printed and the
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| 4 | * program aborts.
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| 5 | * Assertion checking can be disabled by adding the statement
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| 6 | *
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| 7 | * #define NDEBUG
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| 8 | *
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| 9 | * to the program before the
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| 10 | *
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| 11 | * #include <assert.h>
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| 12 | *
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| 13 | * statement.
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| 14 | */
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| 15 |
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| 16 | #undef assert
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| 17 |
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| 18 | #ifndef _ANSI_H
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| 19 | #include <ansi.h>
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| 20 | #endif
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| 21 |
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| 22 | #ifdef NDEBUG
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| 23 | /* Debugging disabled -- do not evaluate assertions. */
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| 24 | #define assert(expr) ((void) 0)
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| 25 | #else
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| 26 | /* Debugging enabled -- verify assertions at run time. */
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| 27 | #ifdef _ANSI
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| 28 | #define __str(x) # x
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| 29 | #define __xstr(x) __str(x)
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| 30 |
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| 31 | _PROTOTYPE( void __bad_assertion, (const char *_mess) );
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| 32 | #define assert(expr) ((expr)? (void)0 : \
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| 33 | __bad_assertion("Assertion \"" #expr \
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| 34 | "\" failed, file " __xstr(__FILE__) \
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| 35 | ", line " __xstr(__LINE__) "\n"))
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| 36 | #else
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| 37 | #define assert(expr) ((void) ((expr) ? 0 : __assert( __FILE__, __LINE__)))
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| 38 | #endif /* _ANSI */
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| 39 | #endif
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