strchr.c

#define SYSCLIB_DISABLE_BUILTINS
#include <sysclib.h>
 
char *__strchrnul(const char *s, int c);
 
char *strchr(const char *s, int c)
{
    char *r = __strchrnul(s, c);
    return *(unsigned char *)r == (unsigned char)c ? r : 0;
}