ack/lang/cem/libcc.ansi/core/string/memchr.c
David Given d1cdb07719 Realise that the libc core can safely call other libc core functions, even if
they're not defined in the core: so putw() can call stdio stuff, for example.
So the earlier concept of pureness isn't necessary. Rename accordingly.
2018-06-21 23:24:23 +02:00

26 lines
444 B
C

/*
* (c) copyright 1987 by the Vrije Universiteit, Amsterdam, The Netherlands.
* See the copyright notice in the ACK home directory, in the file "Copyright".
*/
/* $Id$ */
#include <string.h>
void* memchr(const void* s, register int c, register size_t n)
{
register const unsigned char* s1 = s;
c = (unsigned char)c;
if (n)
{
n++;
while (--n > 0)
{
if (*s1++ != c)
continue;
return (void*)--s1;
}
}
return NULL;
}