memory(3C) memory(3C)NAME memccpy, memchr, memcmp, memcpy, memset - perform memory operations SYNOPSIS #include <memory.h> char *memccpy(s1, s2, c, n) char *s1, *s2; int c, n; char *memchr(s, c, n) char *s; int c, n; int memcmp(s1, s2, n) char *s1, *s2; int n; char *memcpy(s1, s2, n) char *s1, *s2; int n; char *memset(s, c, n) char *s; int c, n; DESCRIPTION These functions operate efficiently on memory areas (arrays of characters bounded by a count, not terminated by a null character). They do not check for the overflow of any receiving memory area. memccpy copies characters from memory area s2 into s1, stopping after the first occurrence of character c has been copied or after n characters have been copied, whichever comes first. It returns either a pointer to the character after the copy of c in s1 or a NULL pointer if c was not found in the first n characters of s2. memchr returns either a pointer to the first occurrence of character c in the first n characters of memory area s or a NULL pointer if c does not occur. memcmp compares its arguments, looking at the first n characters only. It returns an integer less than, equal to, or greater than 0, depending on whether s1 is lexicographically less than, equal to, or greater than s2. memcpy copies n characters from memory area s2 to s1. It returns s1. January 1992 1
memory(3C) memory(3C)memset sets the first n characters in memory area s to the value of character c. It returns s . LIMITATIONS The memcmp program uses native character comparison. Because character movement is performed differently in different implementations, overlapping moves may yield unexpected results. NOTES For user convenience, all these functions are declared in the optional <memory.h> header file. 2 January 1992