strstr.c

/*
# _____     ___ ____     ___ ____
#  ____|   |    ____|   |        | |____|
# |     ___|   |____ ___|    ____| |    \    PS2DEV Open Source Project.
#-----------------------------------------------------------------------
# Copyright 2001-2004, ps2dev - http://www.ps2dev.org
# Licenced under Academic Free License version 2.0
# Review ps2sdk README & LICENSE files for further details.
*/
 
#define SYSCLIB_DISABLE_BUILTINS
#include <sysclib.h>
 
char *strstr(const char *haystack, const char *needle)
{
    const char *i;
    int v4;
    const char *v5;
 
    if (!*needle)
    {
        return (char *)haystack;
    }
LABEL_10:
    v5 = haystack;
    if (*haystack)
    {
        for (i = needle; *i; i += 1)
        {
            v4 = *v5;
            if (!*v5)
            {
                return 0;
            }
            v5 += 1;
            if (v4 != *i)
            {
                haystack += 1;
                goto LABEL_10;
            }
        }
        return (char *)haystack;
    }
    return 0;
}