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memchr
[find character in memory]

    SYNOPSIS
    #include <string.h>
    void *memchr(const void *src, int c, size_t length);

DESCRIPTION
The function, memchr, searches memory starting at *src for the character, c. The search only ends with the first occurrence of c, or after length characters; in particular, NULL does not terminate the search.

RETURNS
If the character c is found within length characters of *src, a pointer to the character is returned. If c is not found, then NULL is returned.

COMPLIANCE
memchr is ANSI C.

memchr requires no supporting OS subroutines.