X-Git-Url: https://pd.if.org/git/?a=blobdiff_plain;f=functions%2Fstdio%2Fvfprintf.c;h=7dd7f2dfe1e6b4855c99b2217e063fce91ebf1da;hb=0711226145f12c37217681b57944860bdeb6ace0;hp=a903d8f1822aa93ae7a499ffd53ce1a71ffc7054;hpb=34893ecc2200dc7017c36a54cb6c5f4c2378b5ec;p=pdclib

diff --git a/functions/stdio/vfprintf.c b/functions/stdio/vfprintf.c
index a903d8f..7dd7f2d 100644
--- a/functions/stdio/vfprintf.c
+++ b/functions/stdio/vfprintf.c
@@ -1,8 +1,90 @@
-// ----------------------------------------------------------------------------
-// $Id$
-// ----------------------------------------------------------------------------
-// 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>
+#include <limits.h>
+
+#ifndef REGTEST
+#include <_PDCLIB_io.h>
+
+int _PDCLIB_vfprintf_unlocked( FILE * _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 = UINT_MAX;
+    status.i = 0;
+    status.current = 0;
+    status.s = NULL;
+    status.width = 0;
+    status.prec = 0;
+    status.stream = stream;
+    va_copy( status.arg, arg );
+
+    while ( *format != '\0' )
+    {
+        const char * rc;
+        if ( ( *format != '%' ) || ( ( rc = _PDCLIB_print( format, &status ) ) == format ) )
+        {
+            /* No conversion specifier, print verbatim */
+            _PDCLIB_putc_unlocked( *(format++), stream );
+            status.i++;
+        }
+        else
+        {
+            /* Continue parsing after conversion specifier */
+            format = rc;
+        }
+    }
+    va_end( status.arg );
+    return status.i;
+}
+
+int vfprintf( FILE * _PDCLIB_restrict stream, 
+              const char * _PDCLIB_restrict format, 
+              va_list arg )
+{
+    _PDCLIB_flockfile( stream );
+    int r = _PDCLIB_vfprintf_unlocked( stream, format, arg );
+    _PDCLIB_funlockfile( stream );
+    return r;
+}
+
+#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