/* * Copyright (C) 2002 Manuel Novoa III * Copyright (C) 2000-2005 Erik Andersen <andersen@uclibc.org> * * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball. */ #include "_string.h" #include <ctype.h> char *strcasestr(const char *s1, const char *s2) { register const char *s = s1; register const char *p = s2; #if 1 do { if (!*p) { return (char *) s1;; } if ((*p == *s) || (tolower(*((unsigned char *)p)) == tolower(*((unsigned char *)s))) ) { ++p; ++s; } else { p = s2; if (!*s) { return NULL; } s = ++s1; } } while (1); #else while (*p && *s) { if ((*p == *s) || (tolower(*((unsigned char *)p)) == tolower(*((unsigned char *)s))) ) { ++p; ++s; } else { p = s2; s = ++s1; } } return (*p) ? NULL : (char *) s1; #endif } libc_hidden_def(strcasestr)