120 lines
3.6 KiB
C++
Executable File
120 lines
3.6 KiB
C++
Executable File
/*
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* Copyright 2004 The WebRTC Project Authors. All rights reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef RTC_BASE_STRINGUTILS_H_
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#define RTC_BASE_STRINGUTILS_H_
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#include <ctype.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <string.h>
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#if defined(WEBRTC_WIN)
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#include <malloc.h>
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#include <wchar.h>
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#include <windows.h>
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#define alloca _alloca
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#endif // WEBRTC_WIN
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#if defined(WEBRTC_POSIX)
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#ifdef BSD
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#include <stdlib.h>
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#else // BSD
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#include <alloca.h>
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#endif // !BSD
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#include <strings.h>
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#endif // WEBRTC_POSIX
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#include <string>
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///////////////////////////////////////////////////////////////////////////////
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// Generic string/memory utilities
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///////////////////////////////////////////////////////////////////////////////
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#define STACK_ARRAY(TYPE, LEN) \
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static_cast<TYPE*>(::alloca((LEN) * sizeof(TYPE)))
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///////////////////////////////////////////////////////////////////////////////
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// Traits simplifies porting string functions to be CTYPE-agnostic
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///////////////////////////////////////////////////////////////////////////////
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namespace rtc {
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const size_t SIZE_UNKNOWN = static_cast<size_t>(-1);
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// Safe version of strncpy that always nul-terminate.
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size_t strcpyn(char* buffer,
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size_t buflen,
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const char* source,
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size_t srclen = SIZE_UNKNOWN);
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///////////////////////////////////////////////////////////////////////////////
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// UTF helpers (Windows only)
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///////////////////////////////////////////////////////////////////////////////
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#if defined(WEBRTC_WIN)
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inline std::wstring ToUtf16(const char* utf8, size_t len) {
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int len16 = ::MultiByteToWideChar(CP_UTF8, 0, utf8, static_cast<int>(len),
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nullptr, 0);
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wchar_t* ws = STACK_ARRAY(wchar_t, len16);
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::MultiByteToWideChar(CP_UTF8, 0, utf8, static_cast<int>(len), ws, len16);
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return std::wstring(ws, len16);
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}
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inline std::wstring ToUtf16(const std::string& str) {
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return ToUtf16(str.data(), str.length());
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}
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inline std::string ToUtf8(const wchar_t* wide, size_t len) {
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int len8 = ::WideCharToMultiByte(CP_UTF8, 0, wide, static_cast<int>(len),
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nullptr, 0, nullptr, nullptr);
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char* ns = STACK_ARRAY(char, len8);
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::WideCharToMultiByte(CP_UTF8, 0, wide, static_cast<int>(len), ns, len8,
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nullptr, nullptr);
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return std::string(ns, len8);
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}
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inline std::string ToUtf8(const wchar_t* wide) {
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return ToUtf8(wide, wcslen(wide));
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}
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inline std::string ToUtf8(const std::wstring& wstr) {
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return ToUtf8(wstr.data(), wstr.length());
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}
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#endif // WEBRTC_WIN
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// Replaces all occurrences of "search" with "replace".
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void replace_substrs(const char* search,
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size_t search_len,
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const char* replace,
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size_t replace_len,
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std::string* s);
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// True iff s1 starts with s2.
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bool starts_with(const char* s1, const char* s2);
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// True iff s1 ends with s2.
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bool ends_with(const char* s1, const char* s2);
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// Remove leading and trailing whitespaces.
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std::string string_trim(const std::string& s);
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// TODO(jonasolsson): replace with absl::Hex when that becomes available.
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std::string ToHex(const int i);
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std::string LeftPad(char padding, unsigned length, std::string s);
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} // namespace rtc
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#endif // RTC_BASE_STRINGUTILS_H_
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