Closer to functional printf().

[pdclib] / functions / stdio / vfprintf.c

diff --git a/functions/stdio/vfprintf.c b/functions/stdio/vfprintf.c
index a903d8f1822aa93ae7a499ffd53ce1a71ffc7054..0288f6d74b90b9c17fa38ee43a6a68acc01e634a 100644 (file)
--- a/functions/stdio/vfprintf.c
+++ b/functions/stdio/vfprintf.c
@@ -1,8 +1,65 @@
-// ----------------------------------------------------------------------------
-// $Id$
-// ----------------------------------------------------------------------------
-// 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 );
+        }
+        else
+        {
+            /* Continue parsing after conversion specifier */
+            format = rc;
+        }
+    }
+    return status.i;
+}
+
+#endif
+
+#ifdef TEST
+#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( testprintf( stdout, "Hallo\n" ) == 6 );
+#if 0
+    TESTCASE( ( fh = fopen( "testfile", "w" ) ) != NULL );
+    TESTCASE( testprintf( fh, "Hallo\n" ) );
+    TESTCASE( fclose( fh ) == 0 );
+    TESTCASE( remove( "testfile" ) == 0 );
+#endif
+    return TEST_RESULTS;
+}
+
+#endif