std::wbuffer_convert<Codecvt,Elem,Tr>::rdbuf
来自cppreference.com
< cpp | locale | wbuffer convert
在标头 <locale> 定义
|
||
std::streambuf* rdbuf() const; |
(1) | |
std::streambuf* rdbuf( std::streambuf* bytebuf ); |
(2) | |
1) 返回指向底层字节流的指针。
2) 以 bytebuf
替换关联字节流。
返回值
1) 当前的底层字节流
2) 先前的字节流
示例
运行此代码
#include <iostream> #include <sstream> #include <locale> #include <codecvt> int main() { // 转换 UTF-8 到 UCS4 std::stringbuf utf8buf(u8"z\u00df\u6c34\U0001d10b"); // 或 u8"zß水𝄋" // 或 "\x7a\xc3\x9f\xe6\xb0\xb4\xf0\x9d\x84\x8b"; std::wbuffer_convert<std::codecvt_utf8<wchar_t>> conv(&utf8buf); std::wistream ucsbuf(&conv); std::cout << "Reading from a UTF-8 stringbuf via wbuffer_convert:\n"; for(wchar_t c; ucsbuf.get(c); ) std::cout << std::hex << std::showbase << c << '\n'; // 复用同一 wbuffer_convert ,以处理 UCS4 到 UTF-8 的输出 conv.rdbuf(std::cout.rdbuf()); std::wostream out(&conv); std::cout << "Sending UCS4 data to std::cout via wbuffer_convert:\n"; out << L"z\u00df\u6c34\U0001d10b\n"; }
输出:
Reading from a UTF-8 stringbuf via wbuffer_convert: 0x7a 0xdf 0x6c34 0x1d10b Sending UCS4 data to std::cout via wbuffer_convert: zß水𝄋
参阅
构造新的 wbuffer_convert (公开成员函数) |