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/*
* Copyright (C) 2013 Google Inc. All rights reserved.
*
* 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.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* 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 COPYRIGHT
* OWNER 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 THIRD_PARTY_BLINK_RENDERER_PLATFORM_WTF_TEXT_PARSING_UTILITIES_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_WTF_TEXT_PARSING_UTILITIES_H_
#include <string_view>
#include "base/compiler_specific.h"
#include "base/containers/span.h"
namespace WTF {
template <typename CharType>
bool SkipExactly(base::span<const CharType> chars,
CharType delimiter,
size_t& position) {
if (position < chars.size() && chars[position] == delimiter) {
++position;
return true;
}
return false;
}
template <typename CharType, bool predicate(CharType)>
bool SkipExactly(base::span<const CharType> chars, size_t& position) {
if (position < chars.size() && predicate(chars[position])) {
++position;
return true;
}
return false;
}
// Use a span version instead.
template <typename CharType>
UNSAFE_BUFFER_USAGE bool SkipToken(const CharType*& position,
const CharType* end,
const char* token) {
const CharType* current = position;
while (current < end && *token) {
if (*current != *token)
return false;
UNSAFE_TODO(++current);
UNSAFE_TODO(++token);
}
if (*token)
return false;
position = current;
return true;
}
template <typename CharType>
bool SkipToken(base::span<const CharType>& chars, std::string_view token) {
if (chars.size() < token.size()) {
return false;
}
if (chars.first(token.size()) != base::span(token)) {
return false;
}
chars = chars.subspan(token.size());
return true;
}
// Use a span version instead.
template <typename CharType>
UNSAFE_BUFFER_USAGE void SkipUntil(const CharType*& position,
const CharType* end,
CharType delimiter) {
while (position < end && *position != delimiter)
UNSAFE_TODO(++position);
}
template <typename CharType, bool predicate(CharType)>
[[nodiscard]] size_t SkipUntil(base::span<const CharType> chars,
size_t position) {
while (position < chars.size() && !predicate(chars[position])) {
++position;
}
return position;
}
template <typename CharType, bool predicate(CharType)>
[[nodiscard]] size_t SkipWhile(base::span<const CharType> chars,
size_t position) {
while (position < chars.size() && predicate(chars[position])) {
++position;
}
return position;
}
template <typename CharType, bool predicate(CharType)>
[[nodiscard]] size_t ReverseSkipWhile(base::span<const CharType> chars,
size_t position,
size_t start) {
while (position >= start && predicate(chars[position])) {
--position;
}
return position;
}
} // namespace WTF
using WTF::SkipExactly;
using WTF::SkipToken;
using WTF::SkipUntil;
using WTF::SkipWhile;
using WTF::ReverseSkipWhile;
#endif // THIRD_PARTY_BLINK_RENDERER_PLATFORM_WTF_TEXT_PARSING_UTILITIES_H_
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