-// ----------------------------------------------------------------------------
-// $Id$
-// ----------------------------------------------------------------------------
-// Public Domain C Library - http://pdclib.sourceforge.net
-// This code is Public Domain. Use, modify, and redistribute at will.
-// ----------------------------------------------------------------------------
-
-FILE * fopen( const char * restrict filename, const char * restrict mode ) { /* TODO */ };
+/* $Id$ */
+
+/* fopen( const char *, const char * )
+
+ 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 <stdlib.h>
+
+#ifndef REGTEST
+#include <_PDCLIB_glue.h>
+
+extern struct _PDCLIB_file_t * _PDCLIB_filelist;
+
+struct _PDCLIB_file_t * fopen( const char * _PDCLIB_restrict filename, const char * _PDCLIB_restrict mode )
+{
+ struct _PDCLIB_file_t * rc;
+ if ( mode == NULL || filename == NULL || filename[0] == '\0' )
+ {
+ /* Mode or filename invalid */
+ return NULL;
+ }
+ if ( ( rc = calloc( 1, sizeof( struct _PDCLIB_file_t ) ) ) == NULL )
+ {
+ /* no memory for another FILE */
+ return NULL;
+ }
+ if ( ( rc->status = _PDCLIB_filemode( mode ) ) == 0 )
+ {
+ /* invalid mode */
+ free( rc );
+ return NULL;
+ }
+ rc->handle = _PDCLIB_open( filename, rc->status );
+ if ( rc->handle == _PDCLIB_NOHANDLE )
+ {
+ /* OS open() failed */
+ free( rc );
+ return NULL;
+ }
+ /* Adding to list of open files */
+ rc->next = _PDCLIB_filelist;
+ _PDCLIB_filelist = rc;
+ /* Setting buffer, and mark as internal. TODO: Check for unbuffered */
+ if ( ( rc->buffer = malloc( BUFSIZ ) ) == NULL )
+ {
+ free( rc );
+ return NULL;
+ }
+ if ( ( rc->ungetbuf = malloc( _PDCLIB_UNGETCBUFSIZE ) ) == NULL )
+ {
+ free( rc->buffer );
+ free( rc );
+ return NULL;
+ }
+ rc->bufsize = BUFSIZ;
+ rc->bufidx = 0;
+ rc->ungetidx = 0;
+ /* Setting buffer to _IOLBF because "when opened, a stream is fully
+ buffered if and only if it can be determined not to refer to an
+ interactive device."
+ */
+ rc->status |= _PDCLIB_LIBBUFFER | _IOLBF;
+ /* TODO: Setting mbstate */
+ return rc;
+}
+
+#endif
+
+#ifdef TEST
+#include <_PDCLIB_test.h>
+
+int main( void )
+{
+ /* Some of the tests are not executed for regression tests, as the libc on
+ my system is at once less forgiving (segfaults on mode NULL) and more
+ forgiving (accepts undefined modes).
+ */
+ remove( "testfile" );
+ TESTCASE_NOREG( fopen( NULL, NULL ) == NULL );
+ TESTCASE( fopen( NULL, "w" ) == NULL );
+ TESTCASE_NOREG( fopen( "", NULL ) == NULL );
+ TESTCASE( fopen( "", "w" ) == NULL );
+ TESTCASE( fopen( "foo", "" ) == NULL );
+ TESTCASE_NOREG( fopen( "testfile", "wq" ) == NULL ); /* Undefined mode */
+ TESTCASE_NOREG( fopen( "testfile", "wr" ) == NULL ); /* Undefined mode */
+ TESTCASE( fopen( "testfile", "w" ) != NULL );
+ remove( "testfile" );
+ return TEST_RESULTS;
+}
+
+#endif