ref: e389dc2387eb8f243a3361263f5ac1d85e95b7ec
dir: /lib/c/src/strpbrk.c/
#include <string.h> #undef strpbrk char * strpbrk(const char *s1, const char *s2) { int c; const char *p; for (; c = *s1; ++s1) { for (p = s2; *p && *p != c; ++p) /* nothing */; if (*p == c) return s1; } return NULL; }