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/*
* Copyright (C) 2013-2015 Max Kellermann <max@duempel.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* FOUNDATION OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "StringCompare.hxx"
#include "StringAPI.hxx"
#include <assert.h>
#include <string.h>
bool
StringStartsWith(const char *haystack, const char *needle)
{
const size_t length = strlen(needle);
return memcmp(haystack, needle, length) == 0;
}
bool
StringEndsWith(const char *haystack, const char *needle)
{
const size_t haystack_length = strlen(haystack);
const size_t needle_length = strlen(needle);
return haystack_length >= needle_length &&
memcmp(haystack + haystack_length - needle_length,
needle, needle_length) == 0;
}
const char *
StringAfterPrefix(const char *string, const char *prefix)
{
#if !CLANG_CHECK_VERSION(3,6)
/* disabled on clang due to -Wtautological-pointer-compare */
assert(string != nullptr);
assert(prefix != nullptr);
#endif
size_t prefix_length = strlen(prefix);
return StringIsEqual(string, prefix, prefix_length)
? string + prefix_length
: nullptr;
}
const char *
FindStringSuffix(const char *p, const char *suffix)
{
const size_t p_length = strlen(p);
const size_t suffix_length = strlen(suffix);
if (p_length < suffix_length)
return nullptr;
const char *q = p + p_length - suffix_length;
return memcmp(q, suffix, suffix_length) == 0
? q
: nullptr;
}
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