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sortix--sortix/libc/stdio/vdprintf.cpp
Jonas 'Sortie' Termansen ec7e0cc9a6 Add cbprintf(3) and vcbprintf(3).
Thanks to Owen Shepherd of the Public Domain C Library for helping design
and formalize these interfaces.
2014-12-01 21:39:05 +01:00

39 lines
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C++

/*******************************************************************************
Copyright(C) Jonas 'Sortie' Termansen 2013, 2014.
This file is part of the Sortix C Library.
The Sortix C Library is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 3 of the License, or (at your
option) any later version.
The Sortix C Library is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
License for more details.
You should have received a copy of the GNU Lesser General Public License
along with the Sortix C Library. If not, see <http://www.gnu.org/licenses/>.
stdio/vdprintf.cpp
Prints a formatted string to a file descriptor.
*******************************************************************************/
#include <ioleast.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdint.h>
#include <unistd.h>
static size_t write_callback(void* user, const char* string, size_t stringlen)
{
return writeall((int) (uintptr_t) user, string, stringlen);
}
extern "C" int vdprintf(int fd, const char* restrict format, va_list list)
{
return vcbprintf((void*) (uintptr_t) fd, write_callback, format, list);
}