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/* vfprintf( FILE *, const char *, va_list )
This file is part of the Public Domain C Library (PDCLib).
Permission is granted to use, modify, and / or redistribute at will.
*/
#include <stdio.h>
#include <stdarg.h>
#include <stdint.h>
#ifndef REGTEST
#include "pdclib/_PDCLIB_glue.h"
#ifndef __STDC_NO_THREADS__
#include <threads.h>
#endif
int vfprintf( struct _PDCLIB_file_t * _PDCLIB_restrict stream, const char * _PDCLIB_restrict format, va_list arg )
{
/* TODO: This function should interpret format as multibyte characters. */
struct _PDCLIB_status_t status;
status.base = 0;
status.flags = 0;
status.n = SIZE_MAX;
status.i = 0;
status.current = 0;
status.s = NULL;
status.width = 0;
status.prec = EOF;
status.stream = stream;
_PDCLIB_LOCK( stream->mtx );
if ( _PDCLIB_prepwrite( stream ) == EOF )
{
_PDCLIB_UNLOCK( stream->mtx );
return EOF;
}
va_copy( status.arg, arg );
while ( *format != '\0' )
{
const char * rc;
if ( ( *format != '%' ) || ( ( rc = _PDCLIB_print( format, &status ) ) == format ) )
{
/* No conversion specifier, print verbatim */
stream->buffer[ stream->bufidx++ ] = *format;
if ( ( stream->bufidx == stream->bufsize )
|| ( ( stream->status & _IOLBF ) && ( *format == '\n' ) )
|| ( stream->status & _IONBF )
)
{
if ( _PDCLIB_flushbuffer( stream ) != 0 )
{
_PDCLIB_UNLOCK( stream->mtx );
return EOF;
}
}
++format;
status.i++;
}
else
{
/* Continue parsing after conversion specifier */
format = rc;
}
}
va_end( status.arg );
_PDCLIB_UNLOCK( stream->mtx );
return status.i;
}
#endif
#ifdef TEST
#define _PDCLIB_FILEID "stdio/vfprintf.c"
#define _PDCLIB_FILEIO
#include <stddef.h>
#include "_PDCLIB_test.h"
static int testprintf( FILE * stream, const char * format, ... )
{
int i;
va_list arg;
va_start( arg, format );
i = vfprintf( stream, format, arg );
va_end( arg );
return i;
}
int main( void )
{
FILE * target;
TESTCASE( ( target = tmpfile() ) != NULL );
#include "printf_testcases.h"
TESTCASE( fclose( target ) == 0 );
return TEST_RESULTS;
}
#endif
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