X-Git-Url: https://pd.if.org/git/?p=pdclib;a=blobdiff_plain;f=functions%2Fstdio%2Ffputc.c;h=1252e6365af44533563f3d4f58bb2151a8c38507;hp=4321b30a2d9c7b3fec376d474ab9a61f6b767ff3;hb=da0f3f353d417fed71f358a48d5d5394145e460d;hpb=34893ecc2200dc7017c36a54cb6c5f4c2378b5ec

diff --git a/functions/stdio/fputc.c b/functions/stdio/fputc.c
index 4321b30..1252e63 100644
--- a/functions/stdio/fputc.c
+++ b/functions/stdio/fputc.c
@@ -1,8 +1,53 @@
-// ----------------------------------------------------------------------------
-// $Id$
-// ----------------------------------------------------------------------------
-// Public Domain C Library - http://pdclib.sourceforge.net
-// This code is Public Domain. Use, modify, and redistribute at will.
-// ----------------------------------------------------------------------------
-
-int fputc( int c, FILE * stream ) { /* TODO */ };
+/* fputc( int, FILE * )
+
+   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>
+
+#ifndef REGTEST
+#include "_PDCLIB_io.h"
+
+/* Write the value c (cast to unsigned char) to the given stream.
+   Returns c if successful, EOF otherwise.
+   If a write error occurs, the error indicator of the stream is set.
+*/
+int _PDCLIB_fputc_unlocked( int c, FILE * stream )
+{
+    if ( _PDCLIB_prepwrite( stream ) == EOF )
+    {
+        return EOF;
+    }
+    stream->buffer[stream->bufidx++] = (char)c;
+    if ( ( stream->bufidx == stream->bufsize )                   /* _IOFBF */
+           || ( ( stream->status & _IOLBF ) && ( (char)c == '\n' ) ) /* _IOLBF */
+           || ( stream->status & _IONBF )                        /* _IONBF */
+    )
+    {
+        /* buffer filled, unbuffered stream, or end-of-line. */
+        return ( _PDCLIB_flushbuffer( stream ) == 0 ) ? c : EOF;
+    }
+    return c;
+}
+
+int fputc( int c, FILE * stream )
+{
+    _PDCLIB_flockfile( stream );
+    int r = _PDCLIB_fputc_unlocked( c, stream );
+    _PDCLIB_funlockfile( stream );
+    return r;
+}
+
+#endif
+
+#ifdef TEST
+#include "_PDCLIB_test.h"
+
+int main( void )
+{
+    /* Testing covered by ftell.c */
+    return TEST_RESULTS;
+}
+
+#endif