std::wbuffer_convert::rdbuf(3) | C++ Standard Libary | std::wbuffer_convert::rdbuf(3) |
NAME¶
std::wbuffer_convert::rdbuf - std::wbuffer_convert::rdbuf
Synopsis¶
Defined in header <locale>
std::streambuf* rdbuf() const; (1)
std::streambuf* rdbuf( std::streambuf* bytebuf ); (2)
1) returns the pointer to the underlying byte stream
2) replaces the associated byte stream with bytebuf .
Return value¶
1) the current underlying byte stream
2) the previous byte stream
Example¶
// Run this code
#include <iostream>
#include <sstream>
#include <locale>
#include <codecvt>
int main()
{
// convert UTF-8 to UCS4
std::stringbuf utf8buf(u8"z\u00df\u6c34\U0001d10b"); // or
u8"zß水𝄋"
// or "\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';
// reuse the same wbuffer_convert to handle UCS4 to UTF-8 output
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";
}
Output:¶
Reading from a UTF-8 stringbuf via wbuffer_convert:
0x7a
0xdf
0x6c34
0x1d10b
Sending UCS4 data to std::cout via wbuffer_convert:
zß水𝄋
See also¶
constructor constructs a new wbuffer_convert
(public member function)
2022.07.31 | http://cppreference.com |