X-Git-Url: https://pd.if.org/git/?a=blobdiff_plain;f=functions%2Fstdio%2Ffputc.c;h=8f9737884b43f972beaa2cc56d7d1fe0d11b979c;hb=13ee02fa27a739d9d602f801126eadcfbfeab8a8;hp=4321b30a2d9c7b3fec376d474ab9a61f6b767ff3;hpb=34893ecc2200dc7017c36a54cb6c5f4c2378b5ec;p=pdclib

diff --git a/functions/stdio/fputc.c b/functions/stdio/fputc.c
index 4321b30..8f97378 100644
--- a/functions/stdio/fputc.c
+++ b/functions/stdio/fputc.c
@@ -1,8 +1,45 @@
-// ----------------------------------------------------------------------------
-// $Id$
-// ----------------------------------------------------------------------------
-// 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 */ };
+/* $Id$ */
+
+/* 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
+
+/* Write the value c (cast to unsigned char) to the given stream.
+   Returns c if successful, EOF otherwise.
+   If a write error occurs, sets the error indicator of the stream is set.
+*/
+int fputc( int c, struct _PDCLIB_file_t * stream )
+{
+    /* FIXME: This is devoid of any error checking (file writeable? r/w
+    constraints honored?) (Text format translations?)
+    */
+    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. */
+        fflush( stream );
+    }
+    return c;
+}
+
+#endif
+
+#ifdef TEST
+#include <_PDCLIB_test.h>
+
+int main( void )
+{
+    TESTCASE( NO_TESTDRIVER );
+    return TEST_RESULTS;
+}
+
+#endif