ack/lang/cem/libcc.ansi/core/string/strstr.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

20 lines
455 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>
char* strstr(register const char* s, register const char* wanted)
{
register const int len = strlen(wanted);
if (len == 0)
return (char*)s;
while (*s != *wanted || strncmp(s, wanted, len))
if (*s++ == '\0')
return (char*)NULL;
return (char*)s;
}