chromium/base/strings/utf_string_conversion_utils.cc

// Copyright 2009 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifdef UNSAFE_BUFFERS_BUILD
// TODO(crbug.com/40284755): Remove this and spanify to fix the errors.
#pragma allow_unsafe_buffers
#endif

#include "base/strings/utf_string_conversion_utils.h"

#include "base/third_party/icu/icu_utf.h"
#include "build/build_config.h"

namespace base {

// CountUnicodeCharacters ------------------------------------------------------

std::optional<size_t> CountUnicodeCharacters(std::string_view text,
                                             size_t limit) { … }

// ReadUnicodeCharacter --------------------------------------------------------

bool ReadUnicodeCharacter(const char* src,
                          size_t src_len,
                          size_t* char_index,
                          base_icu::UChar32* code_point_out) { … }

bool ReadUnicodeCharacter(const char16_t* src,
                          size_t src_len,
                          size_t* char_index,
                          base_icu::UChar32* code_point) { … }

#if defined(WCHAR_T_IS_32_BIT)
bool ReadUnicodeCharacter(const wchar_t* src,
                          size_t src_len,
                          size_t* char_index,
                          base_icu::UChar32* code_point) { … }
#endif  // defined(WCHAR_T_IS_32_BIT)

// WriteUnicodeCharacter -------------------------------------------------------

size_t WriteUnicodeCharacter(base_icu::UChar32 code_point,
                             std::string* output) { … }

size_t WriteUnicodeCharacter(base_icu::UChar32 code_point,
                             std::u16string* output) { … }

// Generalized Unicode converter -----------------------------------------------

template<typename CHAR>
void PrepareForUTF8Output(const CHAR* src,
                          size_t src_len,
                          std::string* output) { … }

// Instantiate versions we know callers will need.
#if !BUILDFLAG(IS_WIN)
// wchar_t and char16_t are the same thing on Windows.
template void PrepareForUTF8Output(const wchar_t*, size_t, std::string*);
#endif
template void PrepareForUTF8Output(const char16_t*, size_t, std::string*);

template<typename STRING>
void PrepareForUTF16Or32Output(const char* src,
                               size_t src_len,
                               STRING* output) { … }

// Instantiate versions we know callers will need.
#if !BUILDFLAG(IS_WIN)
// std::wstring and std::u16string are the same thing on Windows.
template void PrepareForUTF16Or32Output(const char*, size_t, std::wstring*);
#endif
template void PrepareForUTF16Or32Output(const char*, size_t, std::u16string*);

}  // namespace base