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sortix--sortix/libc/print.cpp

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/*******************************************************************************
Copyright(C) Jonas 'Sortie' Termansen 2011, 2012.
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/>.
print.cpp
Provides the stubs for the printf family of functions.
*******************************************************************************/
#include <stdarg.h>
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#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
static size_t FileWriteCallback(void* user, const char* string, size_t stringlen)
{
FILE* fp = (FILE*) user;
return fwrite(string, 1, stringlen, fp);
}
extern "C" int vfprintf(FILE* fp, const char* /*restrict*/ format, va_list list)
{
size_t result = vprintf_callback(FileWriteCallback, fp, format, list);
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if ( result == SIZE_MAX )
return -1;
return (int) result;
}
extern "C" int fprintf(FILE* fp, const char* /*restrict*/ format, ...)
{
va_list list;
va_start(list, format);
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int result = vfprintf(fp, format, list);
va_end(list);
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return result;
}
extern "C" int vprintf(const char* /*restrict*/ format, va_list list)
{
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return vfprintf(stdout, format, list);
}
extern "C" int printf(const char* /*restrict*/ format, ...)
{
va_list list;
va_start(list, format);
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int result = vprintf(format, list);
va_end(list);
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return result;
}