-// ----------------------------------------------------------------------------
-// $Id$
-// ----------------------------------------------------------------------------
-// Public Domain C Library - http://pdclib.sourceforge.net
-// This code is Public Domain. Use, modify, and redistribute at will.
-// ----------------------------------------------------------------------------
-
-int vfprintf( FILE * restrict stream, const char * restrict format, va_list ap ) { /* TODO */ };
+/* $Id$ */
+
+/* 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
+
+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. */
+ /* Members: base, flags, n, i, this, s, width, prec, stream, arg */
+ struct _PDCLIB_status_t status = { 0, 0, SIZE_MAX, 0, 0, NULL, 0, 0, stream, arg };
+ while ( *format != '\0' )
+ {
+ const char * rc;
+ if ( ( *format != '%' ) || ( ( rc = _PDCLIB_print( format, &status ) ) == format ) )
+ {
+ /* No conversion specifier, print verbatim */
+ putc( *(format++), stream );
+ status.i++;
+ }
+ else
+ {
+ /* Continue parsing after conversion specifier */
+ format = rc;
+ }
+ }
+ return status.i;
+}
+
+#endif
+
+#ifdef TEST
+#include <stdlib.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 * fh;
+ TESTCASE( ( fh = fopen( "testfile", "w" ) ) != NULL );
+ TESTCASE( testprintf( fh, "Hallo\n" ) == 6 );
+ TESTCASE( fclose( fh ) == 0 );
+ /* FIXME: Testfile doesn't exist... */
+ return TEST_RESULTS;
+}
+
+#endif