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/*
* Copyright (C) 2013-2018 Max Kellermann <max.kellermann@gmail.com>
*
* 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.
*/
#ifndef ASCII_HXX
#define ASCII_HXX
#include "StringView.hxx"
#include "Compiler.h"
#include <assert.h>
#include <strings.h>
/**
* Determine whether two strings are equal, ignoring case for ASCII
* letters.
*/
gcc_pure gcc_nonnull_all
static inline bool
StringEqualsCaseASCII(const char *a, const char *b) noexcept
{
#if !CLANG_CHECK_VERSION(3,6)
/* disabled on clang due to -Wtautological-pointer-compare */
assert(a != nullptr);
assert(b != nullptr);
#endif
/* note: strcasecmp() depends on the locale, but for ASCII-only
strings, it's safe to use */
return strcasecmp(a, b) == 0;
}
gcc_pure gcc_nonnull_all
static inline bool
StringEqualsCaseASCII(const char *a, const char *b, size_t n) noexcept
{
#if !CLANG_CHECK_VERSION(3,6)
/* disabled on clang due to -Wtautological-pointer-compare */
assert(a != nullptr);
assert(b != nullptr);
#endif
/* note: strcasecmp() depends on the locale, but for ASCII-only
strings, it's safe to use */
return strncasecmp(a, b, n) == 0;
}
gcc_pure gcc_nonnull_all
static inline bool
StringStartsWithCaseASCII(const char *haystack, StringView needle) noexcept
{
return StringEqualsCaseASCII(haystack, needle.data, needle.size);
}
gcc_pure gcc_nonnull_all
static inline const char *
StringAfterPrefixCaseASCII(const char *haystack, StringView needle) noexcept
{
return StringStartsWithCaseASCII(haystack, needle)
? haystack + needle.size
: nullptr;
}
#endif
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