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/*
* Copyright (C) 2002 Manuel Novoa III
* Copyright (C) 2000-2005 Erik Andersen <andersen@uclibc.org>
*
* Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
*/
#include "_string.h"
void *memmem(const void *haystack, size_t haystacklen,
const void *needle, size_t needlelen)
{
register const char *ph;
register const char *pn;
const char *plast;
size_t n;
if (needlelen == 0) {
return (void *) haystack;
}
if (haystacklen >= needlelen) {
ph = (const char *) haystack;
pn = (const char *) needle;
plast = ph + (haystacklen - needlelen);
do {
n = 0;
while (ph[n] == pn[n]) {
if (++n == needlelen) {
return (void *) ph;
}
}
} while (++ph <= plast);
}
return NULL;
}
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