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/* See LICENSE file for copyright and license details. */
#include "libsimple.h"
char *
libsimple_strrcasestr(const char *h_, const char *n)
{
char *h = *(char **)(void *)&h_;
size_t hn = strlen(h);
size_t nn = strlen(n);
if (hn < nn)
return NULL;
for (h += hn -= nn; hn--; h--)
if (!strcasecmp(h, n))
return h;
return NULL;
}
#ifdef TEST
#include <assert.h>
int
main(void)
{
assert(!strcmp(libsimple_strrcasestr("", ""), ""));
assert(!strcmp(libsimple_strrcasestr("test", ""), ""));
assert(!libsimple_strrcasestr("", ""));
assert(!libsimple_strrcasestr("t", "t"));
assert(!strcmp(libsimple_strrcasestr("test", "t"), "t"));
assert(!strcmp(libsimple_strrcasestr("test", "e"), "est"));
assert(!strcmp(libsimple_strrcasestr("test", "s"), "st"));
assert(!libsimple_strrcasestr("test", "x"));
assert(!strcmp(libsimple_strrcasestr("test", "te"), "test"));
assert(!strcmp(libsimple_strrcasestr("test", "es"), "est"));
assert(!strcmp(libsimple_strrcasestr("test", "st"), "st"));
assert(!libsimple_strrcasestr("test", "xx"));
assert(!strcmp(libsimple_strrcasestr("abc", "c"), "c"));
assert(!strcmp(libsimple_strrcasestr("abc", "bc"), "bc"));
assert(!strcmp(libsimple_strrcasestr("abc", "abc"), "abc"));
assert(!strcmp(libsimple_strrcasestr("abcabc", "bc"), "bc"));
assert(!strcmp(libsimple_strrcasestr("TEST", ""), ""));
assert(!libsimple_strrcasestr("T", "test"));
assert(!strcmp(libsimple_strrcasestr("TEST", "t"), "T"));
assert(!strcmp(libsimple_strrcasestr("TEST", "e"), "EST"));
assert(!strcmp(libsimple_strrcasestr("TEST", "s"), "ST"));
assert(!libsimple_strrcasestr("TEST", "x"));
assert(!strcmp(libsimple_strrcasestr("TEST", "te"), "TEST"));
assert(!strcmp(libsimple_strrcasestr("TEST", "es"), "EST"));
assert(!strcmp(libsimple_strrcasestr("TEST", "st"), "ST"));
assert(!libsimple_strrcasestr("TEST", "xx"));
assert(!strcmp(libsimple_strrcasestr("ABC", "c"), "C"));
assert(!strcmp(libsimple_strrcasestr("ABC", "bc"), "BC"));
assert(!strcmp(libsimple_strrcasestr("ABC", "abc"), "ABC"));
assert(!strcmp(libsimple_strrcasestr("ABCABC", "bc"), "BC"));
assert(!libsimple_strrcasestr("", "TEST"));
assert(!libsimple_strrcasestr("t", "TEST"));
assert(!strcmp(libsimple_strrcasestr("test", "T"), "t"));
assert(!strcmp(libsimple_strrcasestr("test", "E"), "est"));
assert(!strcmp(libsimple_strrcasestr("test", "S"), "st"));
assert(!libsimple_strrcasestr("test", "X"));
assert(!strcmp(libsimple_strrcasestr("test", "TE"), "test"));
assert(!strcmp(libsimple_strrcasestr("test", "ES"), "est"));
assert(!strcmp(libsimple_strrcasestr("test", "ST"), "st"));
assert(!libsimple_strrcasestr("test", "XX"));
assert(!strcmp(libsimple_strrcasestr("abc", "C"), "c"));
assert(!strcmp(libsimple_strrcasestr("abc", "BC"), "bc"));
assert(!strcmp(libsimple_strrcasestr("abc", "ABC"), "abc"));
assert(!strcmp(libsimple_strrcasestr("abcabc", "BC"), "bc"));
return 0;
}
#endif
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