github.com/afumu/libc@v0.0.6/musl/src/string/strchr.c (about)

     1  #include <string.h>
     2  
     3  char *strchr(const char *s, int c)
     4  {
     5  	char *r = __strchrnul(s, c);
     6  	return *(unsigned char *)r == (unsigned char)c ? r : 0;
     7  }