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// Copyright (C) 2012 The Libphonenumber Authors
//
// 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.
//
// Author: Patrick Mezard
#include "phonenumbers/geocoding/mapping_file_provider.h"
#include <algorithm>
#include <cstddef>
#include <cstring>
#include <sstream>
#include <string>
#include "phonenumbers/geocoding/geocoding_data.h"
namespace i18n {
namespace phonenumbers {
using std::string;
namespace {
struct NormalizedLocale {
const char* locale;
const char* normalized_locale;
};
const NormalizedLocale kNormalizedLocales[] = {
{"zh_TW", "zh_Hant"},
{"zh_HK", "zh_Hant"},
{"zh_MO", "zh_Hant"},
};
const char* GetNormalizedLocale(const string& full_locale) {
const int size = sizeof(kNormalizedLocales) / sizeof(*kNormalizedLocales);
for (int i = 0; i != size; ++i) {
if (full_locale.compare(kNormalizedLocales[i].locale) == 0) {
return kNormalizedLocales[i].normalized_locale;
}
}
return NULL;
}
void AppendLocalePart(const string& part, string* full_locale) {
if (!part.empty()) {
full_locale->append("_");
full_locale->append(part);
}
}
void ConstructFullLocale(const string& language, const string& script, const
string& region, string* full_locale) {
full_locale->assign(language);
AppendLocalePart(script, full_locale);
AppendLocalePart(region, full_locale);
}
// Returns true if s1 comes strictly before s2 in lexicographic order.
bool IsLowerThan(const char* s1, const char* s2) {
return strcmp(s1, s2) < 0;
}
// Returns true if languages contains language.
bool HasLanguage(const CountryLanguages* languages, const string& language) {
const char** const start = languages->available_languages;
const char** const end = start + languages->available_languages_size;
const char** const it =
std::lower_bound(start, end, language.c_str(), IsLowerThan);
return it != end && strcmp(language.c_str(), *it) == 0;
}
} // namespace
MappingFileProvider::MappingFileProvider(
const int* country_calling_codes, int country_calling_codes_size,
country_languages_getter get_country_languages)
: country_calling_codes_(country_calling_codes),
country_calling_codes_size_(country_calling_codes_size),
get_country_languages_(get_country_languages) {
}
const string& MappingFileProvider::GetFileName(int country_calling_code,
const string& language,
const string& script,
const string& region,
string* filename) const {
filename->clear();
if (language.empty()) {
return *filename;
}
const int* const country_calling_codes_end = country_calling_codes_ +
country_calling_codes_size_;
const int* const it =
std::lower_bound(country_calling_codes_,
country_calling_codes_end,
country_calling_code);
if (it == country_calling_codes_end || *it != country_calling_code) {
return *filename;
}
const CountryLanguages* const langs =
get_country_languages_(it - country_calling_codes_);
if (langs->available_languages_size > 0) {
string language_code;
FindBestMatchingLanguageCode(langs, language, script, region,
&language_code);
if (!language_code.empty()) {
std::stringstream filename_buf;
filename_buf << country_calling_code << "_" << language_code;
*filename = filename_buf.str();
}
}
return *filename;
}
void MappingFileProvider::FindBestMatchingLanguageCode(
const CountryLanguages* languages, const string& language,
const string& script, const string& region, string* best_match) const {
string full_locale;
ConstructFullLocale(language, script, region, &full_locale);
const char* const normalized_locale = GetNormalizedLocale(full_locale);
if (normalized_locale != NULL) {
string normalized_locale_str(normalized_locale);
if (HasLanguage(languages, normalized_locale_str)) {
best_match->swap(normalized_locale_str);
return;
}
}
if (HasLanguage(languages, full_locale)) {
best_match->swap(full_locale);
return;
}
if (script.empty() != region.empty()) {
if (HasLanguage(languages, language)) {
*best_match = language;
return;
}
} else if (!script.empty() && !region.empty()) {
string lang_with_script(language);
lang_with_script.append("_");
lang_with_script.append(script);
if (HasLanguage(languages, lang_with_script)) {
best_match->swap(lang_with_script);
return;
}
}
string lang_with_region(language);
lang_with_region.append("_");
lang_with_region.append(region);
if (HasLanguage(languages, lang_with_region)) {
best_match->swap(lang_with_region);
return;
}
if (HasLanguage(languages, language)) {
*best_match = language;
return;
}
best_match->clear();
}
} // namespace phonenumbers
} // namespace i18n
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