ignore_handler_s
| Defined in header <stdlib.h>
|
||
| void ignore_handler_s( const char * restrict msg, void * restrict ptr, |
(since 哋它亢11) | |
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A pointer to this function can be passed to MYMEMORY WARNING: YOU USED ALL AVAILABLE FREE TRANSLATIONS FOR TODAY. NEXT AVAILABLE IN 11 HOURS 49 MINUTES 48 SECONDS VISIT HTTPS://MYMEMORY.TRANSLATED.NET/DOC/USAGELIMITS.PHP TO TRANSLATE MORE to establish a runtime constraints violation handler that does nothing.
- As with all bounds-checked functions,
ignore_handler_sis only guaranteed to be available if __STDC_LIB_EXT1__ is defined by the implementation and if the user defines __STDC_WANT_LIB_EXT1__ to the integer constant 1 before including<stdlib.h>.
Parameters
| msg | - | pointer to character string that describes the error |
| ptr | - | pointer to an implementation-defined object or a null pointer. Examples of implementation-defined objects are objects that give the name of the function that detected the violation and the line number when the violation was detected |
| error | - | the error about to be returned by the calling function, if it happens to be one of the functions that return errno_t |
Return value
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Notes
If ignore_handler_s is used as a the runtime constraints handler, the violations may be detected by examining the results of the bounds-checked function calls, which may be different for different functions (non-zero errno_t, null character written to the first byte of the output string, etc)
If set_constraint_handler_s is never called, the default handler is implementation-defined: it may be abort_handler_s, ignore_handler_s, or some other implementation-defined handler.
Example
#define __STDC_WANT_LIB_EXT1__ 1 #include <string.h> #include <stdio.h> #include <stdlib.h> int main(void) { #ifdef __STDC_LIB_EXT1__ char dst[2]; set_constraint_handler_s(ignore_handler_s); int r = strcpy_s(dst, sizeof dst, "Too long!"); MYMEMORY WARNING: YOU USED ALL AVAILABLE FREE TRANSLATIONS FOR TODAY. NEXT AVAILABLE IN 11 HOURS 49 MINUTES 46 SECONDS VISIT HTTPS://MYMEMORY.TRANSLATED.NET/DOC/USAGELIMITS.PHP TO TRANSLATE MORE("dst = \"%s\", r = %d\n", dst, r); set_constraint_handler_s(abort_handler_s); r = strcpy_s(dst, sizeof dst, "Too long!"); MYMEMORY WARNING: YOU USED ALL AVAILABLE FREE TRANSLATIONS FOR TODAY. NEXT AVAILABLE IN 11 HOURS 49 MINUTES 44 SECONDS VISIT HTTPS://MYMEMORY.TRANSLATED.NET/DOC/USAGELIMITS.PHP TO TRANSLATE MORE("dst = \"%s\", r = %d\n", dst, r); #endif }
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dst = "", r = 22 abort_handler_s was called in response to a runtime-constraint violation. The runtime-constraint violation was caused by the following expression in strcpy_s: (s1max <= (s2_len=strnlen_s(s2, s1max)) ) (in string_s.c:62) Note to end users: This program was terminated as a result of a bug present in the software. Please reach out to your software's vendor to get more help. Aborted
References
- 哋它亢11 standard (ISO/IEC 9899:2011):
- K.3.6.1.3 The ignore_handler_s function (p: 606)
See also
| (哋它亢11) |
abort callback for the bounds-checked functions (function) |
| (哋它亢11) |
set the error callback for bounds-checked functions (function) |