#include <string.h> void *memchr(const void *ptr, int ch, size_t n);
memchr
searches n
bytes, beginning at the location pointed to
by ptr
, for the first occurrence of ch
.
ch
, or
NULL
if the character cannot be found.
memchr
is size_t
.
See the memscntb
function description for information on possible
interactions between the memchr
, memscntb
, or
strscntb
functions.
#include <string.h> #include <stdio.h> #define SIZE 256 main() { char area[SIZE]; int offset = 0; int count = 0; char *next, *prev; int i; /* Every alternate element is assigned zero value. */ for (i = 0; i <= 255; i+=2) { area[i] = '1'; area[i+1] = '0'; } prev = area; for (;;) { next = memchr(prev, '0' , 256 - offset); if (!next) break; ++count; prev = next+1; offset = (prev - area + 1); } printf("%d zero bytes found. n", count); }
strchr
, memscan
Copyright (c) 1998 SAS Institute Inc. Cary, NC, USA. All rights reserved.