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33 lines
815 B
33 lines
815 B
/* |
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@deftypefn Supplemental void* memchr (const void *@var{s}, int @var{c}, @ |
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size_t @var{n}) |
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This function searches memory starting at @code{*@var{s}} for the |
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character @var{c}. The search only ends with the first occurrence of |
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@var{c}, or after @var{length} characters; in particular, a null |
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character does not terminate the search. If the character @var{c} is |
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found within @var{length} characters of @code{*@var{s}}, a pointer |
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to the character is returned. If @var{c} is not found, then @code{NULL} is |
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returned. |
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@end deftypefn |
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*/ |
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#include <ansidecl.h> |
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#include <stddef.h> |
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PTR |
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memchr (register const PTR src_void, int c, size_t length) |
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{ |
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const unsigned char *src = (const unsigned char *)src_void; |
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while (length-- > 0) |
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{ |
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if (*src == c) |
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return (PTR)src; |
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src++; |
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} |
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return NULL; |
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}
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