memchr - find byte in memory
void *memchr(const void *s, int c, size_t n);
[CX] The functionality described on this reference page is aligned with the ISO C standard. Any conflict between the requirements described here and the ISO C standard is unintentional. This volume of POSIX.1-2017 defers to the ISO C standard.
The memchr() function shall locate the first occurrence of c (converted to an unsigned char) in the initial n bytes (each interpreted as unsigned char) pointed to by s.
Implementations shall behave as if they read the memory byte by byte from the beginning of the bytes pointed to by s and stop at the first occurrence of c (if it is found in the initial n bytes).
The memchr() function shall return a pointer to the located byte, or a null pointer if the byte is not found.
No errors are defined.
First released in Issue 1. Derived from Issue 1 of the SVID.
POSIX.1-2008, Technical Corrigendum 1, XSH/TC1-2008/0374  is applied.
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