diff options
Diffstat (limited to 'security/sandbox/chromium/base/strings/utf_string_conversion_utils.cc')
-rw-r--r-- | security/sandbox/chromium/base/strings/utf_string_conversion_utils.cc | 148 |
1 files changed, 0 insertions, 148 deletions
diff --git a/security/sandbox/chromium/base/strings/utf_string_conversion_utils.cc b/security/sandbox/chromium/base/strings/utf_string_conversion_utils.cc deleted file mode 100644 index 3101a6028..000000000 --- a/security/sandbox/chromium/base/strings/utf_string_conversion_utils.cc +++ /dev/null @@ -1,148 +0,0 @@ -// Copyright (c) 2009 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_conversion_utils.h" - -#include "base/third_party/icu/icu_utf.h" - -namespace base { - -// ReadUnicodeCharacter -------------------------------------------------------- - -bool ReadUnicodeCharacter(const char* src, - int32_t src_len, - int32_t* char_index, - uint32_t* code_point_out) { - // U8_NEXT expects to be able to use -1 to signal an error, so we must - // use a signed type for code_point. But this function returns false - // on error anyway, so code_point_out is unsigned. - int32_t code_point; - CBU8_NEXT(src, *char_index, src_len, code_point); - *code_point_out = static_cast<uint32_t>(code_point); - - // The ICU macro above moves to the next char, we want to point to the last - // char consumed. - (*char_index)--; - - // Validate the decoded value. - return IsValidCodepoint(code_point); -} - -bool ReadUnicodeCharacter(const char16* src, - int32_t src_len, - int32_t* char_index, - uint32_t* code_point) { - if (CBU16_IS_SURROGATE(src[*char_index])) { - if (!CBU16_IS_SURROGATE_LEAD(src[*char_index]) || - *char_index + 1 >= src_len || - !CBU16_IS_TRAIL(src[*char_index + 1])) { - // Invalid surrogate pair. - return false; - } - - // Valid surrogate pair. - *code_point = CBU16_GET_SUPPLEMENTARY(src[*char_index], - src[*char_index + 1]); - (*char_index)++; - } else { - // Not a surrogate, just one 16-bit word. - *code_point = src[*char_index]; - } - - return IsValidCodepoint(*code_point); -} - -#if defined(WCHAR_T_IS_UTF32) -bool ReadUnicodeCharacter(const wchar_t* src, - int32_t src_len, - int32_t* char_index, - uint32_t* code_point) { - // Conversion is easy since the source is 32-bit. - *code_point = src[*char_index]; - - // Validate the value. - return IsValidCodepoint(*code_point); -} -#endif // defined(WCHAR_T_IS_UTF32) - -// WriteUnicodeCharacter ------------------------------------------------------- - -size_t WriteUnicodeCharacter(uint32_t code_point, std::string* output) { - if (code_point <= 0x7f) { - // Fast path the common case of one byte. - output->push_back(static_cast<char>(code_point)); - return 1; - } - - - // CBU8_APPEND_UNSAFE can append up to 4 bytes. - size_t char_offset = output->length(); - size_t original_char_offset = char_offset; - output->resize(char_offset + CBU8_MAX_LENGTH); - - CBU8_APPEND_UNSAFE(&(*output)[0], char_offset, code_point); - - // CBU8_APPEND_UNSAFE will advance our pointer past the inserted character, so - // it will represent the new length of the string. - output->resize(char_offset); - return char_offset - original_char_offset; -} - -size_t WriteUnicodeCharacter(uint32_t code_point, string16* output) { - if (CBU16_LENGTH(code_point) == 1) { - // Thie code point is in the Basic Multilingual Plane (BMP). - output->push_back(static_cast<char16>(code_point)); - return 1; - } - // Non-BMP characters use a double-character encoding. - size_t char_offset = output->length(); - output->resize(char_offset + CBU16_MAX_LENGTH); - CBU16_APPEND_UNSAFE(&(*output)[0], char_offset, code_point); - return CBU16_MAX_LENGTH; -} - -// Generalized Unicode converter ----------------------------------------------- - -template<typename CHAR> -void PrepareForUTF8Output(const CHAR* src, - size_t src_len, - std::string* output) { - output->clear(); - if (src_len == 0) - return; - if (src[0] < 0x80) { - // Assume that the entire input will be ASCII. - output->reserve(src_len); - } else { - // Assume that the entire input is non-ASCII and will have 3 bytes per char. - output->reserve(src_len * 3); - } -} - -// Instantiate versions we know callers will need. -template void PrepareForUTF8Output(const wchar_t*, size_t, std::string*); -template void PrepareForUTF8Output(const char16*, size_t, std::string*); - -template<typename STRING> -void PrepareForUTF16Or32Output(const char* src, - size_t src_len, - STRING* output) { - output->clear(); - if (src_len == 0) - return; - if (static_cast<unsigned char>(src[0]) < 0x80) { - // Assume the input is all ASCII, which means 1:1 correspondence. - output->reserve(src_len); - } else { - // Otherwise assume that the UTF-8 sequences will have 2 bytes for each - // character. - output->reserve(src_len / 2); - } -} - -// Instantiate versions we know callers will need. -template void PrepareForUTF16Or32Output(const char*, size_t, std::wstring*); -template void PrepareForUTF16Or32Output(const char*, size_t, string16*); - -} // namespace base |