* platform/example is now a "stub" platform - it should compile anywhere, but

[pdclib.old] / platform / example / functions / _PDCLIB / open.c

diff --git a/platform/example/functions/_PDCLIB/open.c b/platform/example/functions/_PDCLIB/open.c
index f7d7778a9e59085c25891fc6d88bcf7c566ef85f..1d292f6e3c15892fa8e46eee4fc599994569ae8e 100644 (file)
--- a/platform/example/functions/_PDCLIB/open.c
+++ b/platform/example/functions/_PDCLIB/open.c
@@ -6,61 +6,19 @@
    Permission is granted to use, modify, and / or redistribute at will.
 */
 
-/* This is an example implementation of _PDCLIB_open() fit for use with POSIX
-   kernels.
+/* This is a stub implementation of open.
 */
 
 #include <stdio.h>
+#include <errno.h>
 
 #ifndef REGTEST
 #include <_PDCLIB_glue.h>
 
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <fcntl.h>
-#include <unistd.h>
-
-_PDCLIB_fd_t _PDCLIB_open( char const * const filename, unsigned int mode )
+int _PDCLIB_open( char const * const filename, unsigned int mode )
 {
-    /* FIXME: THIS IS NOT TO BE USED OUT-OF-THE-BOX.
-       It is a proof-of-concept implementation. E.g. a stream may only be fully
-       buffered IF IT CAN BE DETERMINED NOT TO REFER TO AN INTERACTIVE DEVICE.
-       This logic is not represented here, as this is the EXAMPLE platform, and
-       actual platform overlays may differ widely. Another point is the value
-       for permissions being hardcoded to 0664 for file creations.
-    */
-    int osmode;
-    switch ( mode & ~_PDCLIB_FBIN )
-    {
-        case _PDCLIB_FREAD: /* "r" */
-            osmode = O_RDONLY;
-            break;
-        case _PDCLIB_FWRITE: /* "w" */
-            osmode = O_WRONLY | O_CREAT | O_TRUNC;
-            break;
-        case _PDCLIB_FAPPEND: /* "a" */
-            osmode = O_APPEND | O_CREAT;
-            break;
-        case _PDCLIB_FREAD | _PDCLIB_FRW: /* "r+" */
-            osmode = O_RDWR;
-            break;
-        case _PDCLIB_FWRITE | _PDCLIB_FRW: /* "w+" */
-            osmode = O_RDWR | O_CREAT | O_TRUNC;
-            break;
-        case _PDCLIB_FAPPEND | _PDCLIB_FRW: /* "a+" */
-            osmode = O_RDWR | O_APPEND | O_CREAT;
-            break;
-        default: /* Invalid mode */
-            return -1;
-    }
-    if ( osmode & O_CREAT )
-    {
-        return open( filename, osmode, S_IRUSR | S_IWUSR );
-    }
-    else
-    {
-        return open( filename, osmode );
-    }
+    errno = ENOTSUP;
+    return 1;
 }
 
 #endif
@@ -69,20 +27,12 @@ _PDCLIB_fd_t _PDCLIB_open( char const * const filename, unsigned int mode )
 #include <_PDCLIB_test.h>
 
 #include <stdlib.h>
+#include <string.h>
 
 int main( void )
 {
-    /* This testdriver assumes POSIX, i.e. _PDCLIB_fd_t being int and being
-       incremented by one on each successful open.
-    */
-    _PDCLIB_fd_t fh;
-    TESTCASE( _PDCLIB_open( "testfile2", _PDCLIB_FREAD ) == _PDCLIB_NOHANDLE );
-    TESTCASE( ( fh = _PDCLIB_open( "testfile1", _PDCLIB_FWRITE ) ) != _PDCLIB_NOHANDLE );
-    TESTCASE( write( fh, "test", 4 ) == 4 );
-    TESTCASE( close( fh ) == 0 );
-    TESTCASE( _PDCLIB_open( "testfile1", _PDCLIB_FREAD ) != _PDCLIB_NOHANDLE );
-    system( "rm testfile1" );
     return TEST_RESULTS;
 }
 
 #endif
+