| /* |
| * Copyright 2004 The WebRTC Project Authors. All rights reserved. |
| * |
| * Use of this source code is governed by a BSD-style license |
| * that can be found in the LICENSE file in the root of the source |
| * tree. An additional intellectual property rights grant can be found |
| * in the file PATENTS. All contributing project authors may |
| * be found in the AUTHORS file in the root of the source tree. |
| */ |
| |
| #ifndef RTC_BASE_STRING_UTILS_H_ |
| #define RTC_BASE_STRING_UTILS_H_ |
| |
| #include <ctype.h> |
| #include <stdarg.h> |
| #include <stdio.h> |
| #include <string.h> |
| |
| #if defined(WEBRTC_WIN) |
| #include <malloc.h> |
| #include <wchar.h> |
| #include <windows.h> |
| |
| #define alloca _alloca |
| #endif // WEBRTC_WIN |
| |
| #if defined(WEBRTC_POSIX) |
| #ifdef BSD |
| #include <stdlib.h> |
| #else // BSD |
| #include <alloca.h> |
| #endif // !BSD |
| #include <strings.h> |
| #endif // WEBRTC_POSIX |
| |
| #include <string> |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| // Generic string/memory utilities |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| #define STACK_ARRAY(TYPE, LEN) \ |
| static_cast<TYPE*>(::alloca((LEN) * sizeof(TYPE))) |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| // Traits simplifies porting string functions to be CTYPE-agnostic |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| namespace rtc { |
| |
| const size_t SIZE_UNKNOWN = static_cast<size_t>(-1); |
| |
| // Safe version of strncpy that always nul-terminate. |
| size_t strcpyn(char* buffer, |
| size_t buflen, |
| const char* source, |
| size_t srclen = SIZE_UNKNOWN); |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| // UTF helpers (Windows only) |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| #if defined(WEBRTC_WIN) |
| |
| inline std::wstring ToUtf16(const char* utf8, size_t len) { |
| int len16 = ::MultiByteToWideChar(CP_UTF8, 0, utf8, static_cast<int>(len), |
| nullptr, 0); |
| wchar_t* ws = STACK_ARRAY(wchar_t, len16); |
| ::MultiByteToWideChar(CP_UTF8, 0, utf8, static_cast<int>(len), ws, len16); |
| return std::wstring(ws, len16); |
| } |
| |
| inline std::wstring ToUtf16(const std::string& str) { |
| return ToUtf16(str.data(), str.length()); |
| } |
| |
| inline std::string ToUtf8(const wchar_t* wide, size_t len) { |
| int len8 = ::WideCharToMultiByte(CP_UTF8, 0, wide, static_cast<int>(len), |
| nullptr, 0, nullptr, nullptr); |
| char* ns = STACK_ARRAY(char, len8); |
| ::WideCharToMultiByte(CP_UTF8, 0, wide, static_cast<int>(len), ns, len8, |
| nullptr, nullptr); |
| return std::string(ns, len8); |
| } |
| |
| inline std::string ToUtf8(const wchar_t* wide) { |
| return ToUtf8(wide, wcslen(wide)); |
| } |
| |
| inline std::string ToUtf8(const std::wstring& wstr) { |
| return ToUtf8(wstr.data(), wstr.length()); |
| } |
| |
| #endif // WEBRTC_WIN |
| |
| // Replaces all occurrences of "search" with "replace". |
| void replace_substrs(const char* search, |
| size_t search_len, |
| const char* replace, |
| size_t replace_len, |
| std::string* s); |
| |
| // Remove leading and trailing whitespaces. |
| std::string string_trim(const std::string& s); |
| |
| // TODO(jonasolsson): replace with absl::Hex when that becomes available. |
| std::string ToHex(const int i); |
| |
| std::string LeftPad(char padding, unsigned length, std::string s); |
| |
| } // namespace rtc |
| |
| #endif // RTC_BASE_STRING_UTILS_H_ |