mirror of
https://github.com/klzgrad/naiveproxy.git
synced 2024-12-01 01:36:09 +03:00
135 lines
3.3 KiB
C++
135 lines
3.3 KiB
C++
// Copyright (c) 2011 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.
|
|
|
|
#ifndef BASE_I18N_CHAR_ITERATOR_H_
|
|
#define BASE_I18N_CHAR_ITERATOR_H_
|
|
|
|
#include <stddef.h>
|
|
#include <stdint.h>
|
|
|
|
#include <string>
|
|
|
|
#include "base/i18n/base_i18n_export.h"
|
|
#include "base/macros.h"
|
|
#include "base/strings/string16.h"
|
|
#include "build/build_config.h"
|
|
|
|
// The CharIterator classes iterate through the characters in UTF8 and
|
|
// UTF16 strings. Example usage:
|
|
//
|
|
// UTF8CharIterator iter(&str);
|
|
// while (!iter.end()) {
|
|
// VLOG(1) << iter.get();
|
|
// iter.Advance();
|
|
// }
|
|
|
|
#if defined(OS_WIN)
|
|
typedef unsigned char uint8_t;
|
|
#endif
|
|
|
|
namespace base {
|
|
namespace i18n {
|
|
|
|
class BASE_I18N_EXPORT UTF8CharIterator {
|
|
public:
|
|
// Requires |str| to live as long as the UTF8CharIterator does.
|
|
explicit UTF8CharIterator(const std::string* str);
|
|
~UTF8CharIterator();
|
|
|
|
// Return the starting array index of the current character within the
|
|
// string.
|
|
int32_t array_pos() const { return array_pos_; }
|
|
|
|
// Return the logical index of the current character, independent of the
|
|
// number of bytes each character takes.
|
|
int32_t char_pos() const { return char_pos_; }
|
|
|
|
// Return the current char.
|
|
int32_t get() const { return char_; }
|
|
|
|
// Returns true if we're at the end of the string.
|
|
bool end() const { return array_pos_ == len_; }
|
|
|
|
// Advance to the next actual character. Returns false if we're at the
|
|
// end of the string.
|
|
bool Advance();
|
|
|
|
private:
|
|
// The string we're iterating over.
|
|
const uint8_t* str_;
|
|
|
|
// The length of the encoded string.
|
|
int32_t len_;
|
|
|
|
// Array index.
|
|
int32_t array_pos_;
|
|
|
|
// The next array index.
|
|
int32_t next_pos_;
|
|
|
|
// Character index.
|
|
int32_t char_pos_;
|
|
|
|
// The current character.
|
|
int32_t char_;
|
|
|
|
DISALLOW_COPY_AND_ASSIGN(UTF8CharIterator);
|
|
};
|
|
|
|
class BASE_I18N_EXPORT UTF16CharIterator {
|
|
public:
|
|
// Requires |str| to live as long as the UTF16CharIterator does.
|
|
explicit UTF16CharIterator(const string16* str);
|
|
UTF16CharIterator(const char16* str, size_t str_len);
|
|
~UTF16CharIterator();
|
|
|
|
// Return the starting array index of the current character within the
|
|
// string.
|
|
int32_t array_pos() const { return array_pos_; }
|
|
|
|
// Return the logical index of the current character, independent of the
|
|
// number of codewords each character takes.
|
|
int32_t char_pos() const { return char_pos_; }
|
|
|
|
// Return the current char.
|
|
int32_t get() const { return char_; }
|
|
|
|
// Returns true if we're at the end of the string.
|
|
bool end() const { return array_pos_ == len_; }
|
|
|
|
// Advance to the next actual character. Returns false if we're at the
|
|
// end of the string.
|
|
bool Advance();
|
|
|
|
private:
|
|
// Fills in the current character we found and advances to the next
|
|
// character, updating all flags as necessary.
|
|
void ReadChar();
|
|
|
|
// The string we're iterating over.
|
|
const char16* str_;
|
|
|
|
// The length of the encoded string.
|
|
int32_t len_;
|
|
|
|
// Array index.
|
|
int32_t array_pos_;
|
|
|
|
// The next array index.
|
|
int32_t next_pos_;
|
|
|
|
// Character index.
|
|
int32_t char_pos_;
|
|
|
|
// The current character.
|
|
int32_t char_;
|
|
|
|
DISALLOW_COPY_AND_ASSIGN(UTF16CharIterator);
|
|
};
|
|
|
|
} // namespace i18n
|
|
} // namespace base
|
|
|
|
#endif // BASE_I18N_CHAR_ITERATOR_H_
|