webrtc总的字符串类型转换

通常的字符串类型，UTF8，UTF16，ANSI，UNICODE；

通常，C语言函数，C++的std::stirng方法，以及系统提供的函数都可以实现；我前面的文章也已经讲过；

现在这里主要讲一下webrtc中的字符串转换函数：

具体头文件：webrtc58\src\base\strings\utf_string_conversions.h

namespace base {


// These convert between UTF-8, -16, and -32 strings. They are potentially slow,
// so avoid unnecessary conversions. The low-level versions return a boolean
// indicating whether the conversion was 100% valid. In this case, it will still
// do the best it can and put the result in the output buffer. The versions that
// return strings ignore this error and just return the best conversion
// possible.
BASE_EXPORT bool WideToUTF8(const wchar_t* src, size_t src_len,
                            std::string* output);
BASE_EXPORT std::string WideToUTF8(const std::wstring& wide);
BASE_EXPORT bool UTF8ToWide(const char* src, size_t src_len,
                            std::wstring* output);
BASE_EXPORT std::wstring UTF8ToWide(StringPiece utf8);


BASE_EXPORT bool WideToUTF16(const wchar_t* src, size_t src_len,
                             string16* output);
BASE_EXPORT string16 WideToUTF16(const std::wstring& wide);
BASE_EXPORT bool UTF16ToWide(const char16* src, size_t src_len,
                             std::wstring* output);
BASE_EXPORT std::wstring UTF16ToWide(const string16& utf16);


BASE_EXPORT bool UTF8ToUTF16(const char* src, size_t src_len, string16* output);
BASE_EXPORT string16 UTF8ToUTF16(StringPiece utf8);
BASE_EXPORT bool UTF16ToUTF8(const char16* src, size_t src_len,
                             std::string* output);
BASE_EXPORT std::string UTF16ToUTF8(StringPiece16 utf16);


// This converts an ASCII string, typically a hardcoded constant, to a UTF16
// string.
BASE_EXPORT string16 ASCIIToUTF16(StringPiece ascii);


// Converts to 7-bit ASCII by truncating. The result must be known to be ASCII
// beforehand.
BASE_EXPORT std::string UTF16ToASCII(StringPiece16 utf16);


}  // namespace base

更多示例可以参考： webrtc58\src\base\strings\utf_string_conversions_unittest.cc