std::wbuffer_convert<Codecvt,Elem,Tr>::rdbuf
来自 cppreference.com
< cpp | locale | wbuffer convert
| 定义在头文件 <locale> 中 |
||
| 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) 用 bytebuf 替换关联的字节流。
[编辑] 返回值
1)
bufptr2)
bufptr 的先前值[编辑] 示例
运行此代码
#include <codecvt> #include <iostream> #include <locale> #include <sstream> int main() { // Convert UTF-8 to UCS4 std::stringbuf utf8buf("z\u00df\u6c34\U0001d10b"); // or "\x7a\xc3\x9f\xe6\xb0\xb4\xf0\x9d\x84\x8b" // or u8"zß水𝄋" 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: " << std::hex << std::showbase; for (wchar_t c; ucsbuf.get(c);) std::cout << static_cast<std::wint_t>(c) << ' '; // Reuse the same wbuffer_convert to handle UCS4 to UTF-8 output conv.rdbuf(std::cout.rdbuf()); std::wostream out(&conv); std::cout << "\nSending UCS4 data to std::cout via wbuffer_convert: "; 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𝄋
[编辑] 另请参阅
构造一个新的 wbuffer_convert(公有成员函数) |
