Move base to DEPS

base/strings/utf_string_conversions.cc

-// Copyright (c) 2010 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 "base/strings/utf_string_conversions.h"
-
-#include "base/strings/string_piece.h"
-#include "base/strings/string_util.h"
-#include "base/strings/utf_string_conversion_utils.h"
-
-namespace base {
-
-namespace {
-
-// Generalized Unicode converter -----------------------------------------------
-
-// Converts the given source Unicode character type to the given destination
-// Unicode character type as a STL string. The given input buffer and size
-// determine the source, and the given output STL string will be replaced by
-// the result.
-template<typename SRC_CHAR, typename DEST_STRING>
-bool ConvertUnicode(const SRC_CHAR* src,
-                    size_t src_len,
-                    DEST_STRING* output) {
-  // ICU requires 32-bit numbers.
-  bool success = true;
-  int32 src_len32 = static_cast<int32>(src_len);
-  for (int32 i = 0; i < src_len32; i++) {
-    uint32 code_point;
-    if (ReadUnicodeCharacter(src, src_len32, &i, &code_point)) {
-      WriteUnicodeCharacter(code_point, output);
-    } else {
-      WriteUnicodeCharacter(0xFFFD, output);
-      success = false;
-    }
-  }
-
-  return success;
-}
-
-}  // namespace
-
-// UTF-8 <-> Wide --------------------------------------------------------------
-
-bool WideToUTF8(const wchar_t* src, size_t src_len, std::string* output) {
-  if (IsStringASCII(std::wstring(src, src_len))) {
-    output->assign(src, src + src_len);
-    return true;
-  } else {
-    PrepareForUTF8Output(src, src_len, output);
-    return ConvertUnicode(src, src_len, output);
-  }
-}
-
-std::string WideToUTF8(const std::wstring& wide) {
-  if (IsStringASCII(wide)) {
-    return std::string(wide.data(), wide.data() + wide.length());
-  }
-
-  std::string ret;
-  PrepareForUTF8Output(wide.data(), wide.length(), &ret);
-  ConvertUnicode(wide.data(), wide.length(), &ret);
-  return ret;
-}
-
-bool UTF8ToWide(const char* src, size_t src_len, std::wstring* output) {
-  if (IsStringASCII(StringPiece(src, src_len))) {
-    output->assign(src, src + src_len);
-    return true;
-  } else {
-    PrepareForUTF16Or32Output(src, src_len, output);
-    return ConvertUnicode(src, src_len, output);
-  }
-}
-
-std::wstring UTF8ToWide(const StringPiece& utf8) {
-  if (IsStringASCII(utf8)) {
-    return std::wstring(utf8.begin(), utf8.end());
-  }
-
-  std::wstring ret;
-  PrepareForUTF16Or32Output(utf8.data(), utf8.length(), &ret);
-  ConvertUnicode(utf8.data(), utf8.length(), &ret);
-  return ret;
-}
-
-// UTF-16 <-> Wide -------------------------------------------------------------
-
-#if defined(WCHAR_T_IS_UTF16)
-
-// When wide == UTF-16, then conversions are a NOP.
-bool WideToUTF16(const wchar_t* src, size_t src_len, string16* output) {
-  output->assign(src, src_len);
-  return true;
-}
-
-string16 WideToUTF16(const std::wstring& wide) {
-  return wide;
-}
-
-bool UTF16ToWide(const char16* src, size_t src_len, std::wstring* output) {
-  output->assign(src, src_len);
-  return true;
-}
-
-std::wstring UTF16ToWide(const string16& utf16) {
-  return utf16;
-}
-
-#elif defined(WCHAR_T_IS_UTF32)
-
-bool WideToUTF16(const wchar_t* src, size_t src_len, string16* output) {
-  output->clear();
-  // Assume that normally we won't have any non-BMP characters so the counts
-  // will be the same.
-  output->reserve(src_len);
-  return ConvertUnicode(src, src_len, output);
-}
-
-string16 WideToUTF16(const std::wstring& wide) {
-  string16 ret;
-  WideToUTF16(wide.data(), wide.length(), &ret);
-  return ret;
-}
-
-bool UTF16ToWide(const char16* src, size_t src_len, std::wstring* output) {
-  output->clear();
-  // Assume that normally we won't have any non-BMP characters so the counts
-  // will be the same.
-  output->reserve(src_len);
-  return ConvertUnicode(src, src_len, output);
-}
-
-std::wstring UTF16ToWide(const string16& utf16) {
-  std::wstring ret;
-  UTF16ToWide(utf16.data(), utf16.length(), &ret);
-  return ret;
-}
-
-#endif  // defined(WCHAR_T_IS_UTF32)
-
-// UTF16 <-> UTF8 --------------------------------------------------------------
-
-#if defined(WCHAR_T_IS_UTF32)
-
-bool UTF8ToUTF16(const char* src, size_t src_len, string16* output) {
-  if (IsStringASCII(StringPiece(src, src_len))) {
-    output->assign(src, src + src_len);
-    return true;
-  } else {
-    PrepareForUTF16Or32Output(src, src_len, output);
-    return ConvertUnicode(src, src_len, output);
-  }
-}
-
-string16 UTF8ToUTF16(const StringPiece& utf8) {
-  if (IsStringASCII(utf8)) {
-    return string16(utf8.begin(), utf8.end());
-  }
-
-  string16 ret;
-  PrepareForUTF16Or32Output(utf8.data(), utf8.length(), &ret);
-  // Ignore the success flag of this call, it will do the best it can for
-  // invalid input, which is what we want here.
-  ConvertUnicode(utf8.data(), utf8.length(), &ret);
-  return ret;
-}
-
-bool UTF16ToUTF8(const char16* src, size_t src_len, std::string* output) {
-  if (IsStringASCII(StringPiece16(src, src_len))) {
-    output->assign(src, src + src_len);
-    return true;
-  } else {
-    PrepareForUTF8Output(src, src_len, output);
-    return ConvertUnicode(src, src_len, output);
-  }
-}
-
-std::string UTF16ToUTF8(const string16& utf16) {
-  if (IsStringASCII(utf16)) {
-    return std::string(utf16.begin(), utf16.end());
-  }
-
-  std::string ret;
-  // Ignore the success flag of this call, it will do the best it can for
-  // invalid input, which is what we want here.
-  UTF16ToUTF8(utf16.data(), utf16.length(), &ret);
-  return ret;
-}
-
-#elif defined(WCHAR_T_IS_UTF16)
-// Easy case since we can use the "wide" versions we already wrote above.
-
-bool UTF8ToUTF16(const char* src, size_t src_len, string16* output) {
-  return UTF8ToWide(src, src_len, output);
-}
-
-string16 UTF8ToUTF16(const StringPiece& utf8) {
-  return UTF8ToWide(utf8);
-}
-
-bool UTF16ToUTF8(const char16* src, size_t src_len, std::string* output) {
-  return WideToUTF8(src, src_len, output);
-}
-
-std::string UTF16ToUTF8(const string16& utf16) {
-  return WideToUTF8(utf16);
-}
-
-#endif
-
-string16 ASCIIToUTF16(const StringPiece& ascii) {
-  DCHECK(IsStringASCII(ascii)) << ascii;
-  return string16(ascii.begin(), ascii.end());
-}
-
-std::string UTF16ToASCII(const string16& utf16) {
-  DCHECK(IsStringASCII(utf16)) << UTF16ToUTF8(utf16);
-  return std::string(utf16.begin(), utf16.end());
-}
-
-}  // namespace base