X-Git-Url: https://pd.if.org/git/?p=pdclib;a=blobdiff_plain;f=functions%2Fstdio%2Fvfprintf.c;h=1eeaf0986fedca5503f0495bc638751b9a554dd8;hp=a903d8f1822aa93ae7a499ffd53ce1a71ffc7054;hb=da0f3f353d417fed71f358a48d5d5394145e460d;hpb=34893ecc2200dc7017c36a54cb6c5f4c2378b5ec

diff --git a/functions/stdio/vfprintf.c b/functions/stdio/vfprintf.c
index a903d8f..1eeaf09 100644
--- a/functions/stdio/vfprintf.c
+++ b/functions/stdio/vfprintf.c
@@ -1,8 +1,64 @@
-// ----------------------------------------------------------------------------
-// $Id$
-// ----------------------------------------------------------------------------
-// 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 */ };
+/* 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"
+
+static size_t filecb(void *p, const char *buf, size_t size)
+{
+    return _PDCLIB_fwrite_unlocked( buf, 1, size, (FILE*) p );
+}
+
+int _PDCLIB_vfprintf_unlocked( FILE * _PDCLIB_restrict stream,
+                       const char * _PDCLIB_restrict format,
+                       va_list arg )
+{
+    return _vcbprintf(stream, filecb, format, arg);
+}
+
+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