Cleaned up the testing a bit.

[pdclib] / functions / stdio / fread.c

diff --git a/functions/stdio/fread.c b/functions/stdio/fread.c
index 905ff4dc906c674f2d5ab776569e772066c5a258..c457d481b6d4d22ddd42387627d41b231f0b35de 100644 (file)
--- a/functions/stdio/fread.c
+++ b/functions/stdio/fread.c
@@ -1,8 +1,61 @@
-// ----------------------------------------------------------------------------
-// $Id$
-// ----------------------------------------------------------------------------
-// Public Domain C Library - http://pdclib.sourceforge.net
-// This code is Public Domain. Use, modify, and redistribute at will.
-// ----------------------------------------------------------------------------
-
-size_t fread( void * restrict ptr, size_t size, size_t nelem, FILE * restrict stream ) { /* TODO */ };
+/* $Id$ */
+
+/* fwrite( void *, size_t, size_t, 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>
+#include <_PDCLIB_glue.h>
+
+#ifndef REGTEST
+
+#include <stdbool.h>
+#include <string.h>
+
+size_t fread( void * _PDCLIB_restrict ptr, size_t size, size_t nmemb, struct _PDCLIB_file_t * _PDCLIB_restrict stream )
+{
+    if ( _PDCLIB_prepread( stream ) == EOF )
+    {
+        return 0;
+    }
+    char * dest = (char *)ptr;
+    size_t nmemb_i;
+    for ( nmemb_i = 0; nmemb_i < nmemb; ++nmemb_i )
+    {
+        for ( size_t size_i = 0; size_i < size; ++size_i )
+        {
+            if ( stream->bufidx == stream->bufend )
+            {
+                if ( _PDCLIB_fillbuffer( stream ) == EOF )
+                {
+                    /* Could not read requested data */
+                    return nmemb_i;
+                }
+            }
+            dest[ nmemb_i * size + size_i ] = stream->buffer[ stream->bufidx++ ];
+        }
+    }
+    return nmemb_i;
+}
+
+#endif
+
+#ifdef TEST
+#include <_PDCLIB_test.h>
+
+int main( void )
+{
+    FILE * fh;
+    remove( testfile );
+    TESTCASE( ( fh = fopen( testfile, "w" ) ) != NULL );
+    TESTCASE( fwrite( "SUCCESS testing fwrite()\n", 1, 25, fh ) == 25 );
+    TESTCASE( fclose( fh ) == 0 );
+    /* TODO: Add readback test. */
+    TESTCASE( remove( testfile ) == 0 );
+    return TEST_RESULTS;
+}
+
+#endif
+