chromium/third_party/libaddressinput/src/cpp/src/post_box_matchers.cc

// Copyright (C) 2014 Google Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#include "post_box_matchers.h"

#include <algorithm>
#include <cassert>
#include <cstddef>
#include <cstring>
#include <string>
#include <vector>

#include <re2/re2.h>

#include "language.h"
#include "rule.h"
#include "util/re2ptr.h"
#include "util/size.h"

namespace i18n {
namespace addressinput {

namespace {

// kLanguageInfoMap is a constant table that associates language names
// with the corresponding matching regexp.
//
// NOTE: This array must be sorted in increasing language name values.
//       this is checked at compile time through a static_assert() below.
struct LanguageInfo { … };

constexpr const LanguageInfo kLanguageInfoMap[] = …;

constexpr size_t kLanguageInfoMapSize = …;
// Compile-time function that returns true iff the content of string |a|
// is less or equal to string |b|.
constexpr bool StrLessOrEqualConstexpr(const char* a, const char* b) { … }

// Sanity checks.
static_assert …;
static_assert …;
static_assert …;
static_assert …;
static_assert …;
static_assert …;
static_assert …;
static_assert …;

// Compile-time function to verify that LanguageInfoMap is properly sorted.
// The |n| parameter is a starting position for the check.
constexpr bool CheckLanguageInfoMapOrderConstexpr(size_t n = 0) { … }

// Compile-time check for the order to kLanguageInfoMap entries.
static_assert …;

// Return a pointer to the LanguageInfo entry corresponding to |language|
// or nullptr if this wasn't found.
const LanguageInfo* FindLanguageInfoFor(const std::string& language) { … }

// A convenience wrapper class for a fixed array of RE2PlainPtr that shall
// only be instantiated as a static variable.
class StaticRE2Array { … };

}  // namespace

// static
std::vector<const RE2PlainPtr*> PostBoxMatchers::GetMatchers(
    const Rule& country_rule) { … }

}  // namespace addressinput
}  // namespace i18n