chrome/browser/character_encoding.cc

// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "chrome/browser/character_encoding.h"

#include "base/macros.h"
#include "third_party/icu/source/common/unicode/ucnv.h"

namespace {

// An array of all supported canonical encoding names.
const char* const kCanonicalEncodingNames[] = {
    "Big5",
    "EUC-JP",
    "EUC-KR",
    "gb18030",
    "GBK",
    "IBM866",
    "ISO-2022-JP",
    "ISO-8859-10",
    "ISO-8859-13",
    "ISO-8859-14",
    "ISO-8859-15",
    "ISO-8859-16",
    "ISO-8859-2",
    "ISO-8859-3",
    "ISO-8859-4",
    "ISO-8859-5",
    "ISO-8859-6",
    "ISO-8859-7",
    "ISO-8859-8",
    "ISO-8859-8-I",
    "KOI8-R",
    "KOI8-U",
    "macintosh",
    "Shift_JIS",
    "UTF-16LE",
    "UTF-8",
    "windows-1250",
    "windows-1251",
    "windows-1252",
    "windows-1253",
    "windows-1254",
    "windows-1255",
    "windows-1256",
    "windows-1257",
    "windows-1258",
    "windows-874"
};
} // namespace

std::string GetCanonicalEncodingNameByAliasName(const std::string& alias_name) {
  for (size_t i = 0; i < arraysize(kCanonicalEncodingNames); ++i) {
    if (alias_name == kCanonicalEncodingNames[i])
      return alias_name;
  }
  const char* standards[3] = { "HTML", "MIME", "IANA" };
  for (size_t i = 0; i < arraysize(standards); ++i) {
    UErrorCode error_code = U_ZERO_ERROR;
    const char* canonical_name = ucnv_getCanonicalName(
        alias_name.c_str(), standards[i], &error_code);
    if (U_SUCCESS(error_code) && canonical_name)
      return canonical_name;
  }
  return std::string();
}