X-Git-Url: https://pd.if.org/git/?p=pdclib;a=blobdiff_plain;f=functions%2Fstdio%2Ffputs.c;h=9bd0b5c5d6da50317412330b214d68217498f2b3;hp=86abe11188058dd4566cac1c4775b0f07f9da256;hb=da0f3f353d417fed71f358a48d5d5394145e460d;hpb=34893ecc2200dc7017c36a54cb6c5f4c2378b5ec

diff --git a/functions/stdio/fputs.c b/functions/stdio/fputs.c
index 86abe11..9bd0b5c 100644
--- a/functions/stdio/fputs.c
+++ b/functions/stdio/fputs.c
@@ -1,8 +1,76 @@
-// ----------------------------------------------------------------------------
-// $Id$
-// ----------------------------------------------------------------------------
-// Public Domain C Library - http://pdclib.sourceforge.net
-// This code is Public Domain. Use, modify, and redistribute at will.
-// ----------------------------------------------------------------------------
-
-int fputs( const char * restrict s, FILE * restrict stream ) { /* TODO */ };
+/* fputs( const char *, 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"
+
+int _PDCLIB_fputs_unlocked( const char * _PDCLIB_restrict s, 
+                    FILE * _PDCLIB_restrict stream )
+{
+    if ( _PDCLIB_prepwrite( stream ) == EOF )
+    {
+        return EOF;
+    }
+    while ( *s != '\0' )
+    {
+        /* Unbuffered and line buffered streams get flushed when fputs() does
+           write the terminating end-of-line. All streams get flushed if the
+           buffer runs full.
+        */
+        stream->buffer[ stream->bufidx++ ] = *s;
+        if ( ( stream->bufidx == stream->bufsize ) ||
+             ( ( stream->status & _IOLBF ) && *s == '\n' )
+           )
+        {
+            if ( _PDCLIB_flushbuffer( stream ) == EOF )
+            {
+                return EOF;
+            }
+        }
+        ++s;
+    }
+    if ( stream->status & _IONBF )
+    {
+        if ( _PDCLIB_flushbuffer( stream ) == EOF )
+        {
+            return EOF;
+        }
+    }
+    return 0;
+}
+
+int fputs( const char * _PDCLIB_restrict s,
+           FILE * _PDCLIB_restrict stream )
+{
+    _PDCLIB_flockfile( stream );
+    int r = _PDCLIB_fputs_unlocked( s, stream );
+    _PDCLIB_funlockfile( stream );
+    return r;
+}
+
+#endif
+#ifdef TEST
+#include "_PDCLIB_test.h"
+
+int main( void )
+{
+    char const * const message = "SUCCESS testing fputs()";
+    FILE * fh;
+    TESTCASE( ( fh = tmpfile() ) != NULL );
+    TESTCASE( fputs( message, fh ) >= 0 );
+    rewind( fh );
+    for ( size_t i = 0; i < 23; ++i )
+    {
+        TESTCASE( fgetc( fh ) == message[i] );
+    }
+    TESTCASE( fclose( fh ) == 0 );
+    return TEST_RESULTS;
+}
+
+#endif
+