* 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 2098dd360a866b65db4a7f9a5c5a249d4f72020c..1d292f6e3c15892fa8e46eee4fc599994569ae8e 100644 (file)
--- a/platform/example/functions/_PDCLIB/open.c
+++ b/platform/example/functions/_PDCLIB/open.c
@@ -6,92 +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>
-
-#include "/usr/include/errno.h"
-
 int _PDCLIB_open( char const * const filename, unsigned int mode )
 {
-    /* This is an example implementation of _PDCLIB_open() fit for use with
-       POSIX kernels.
-    */
-    int osmode;
-    switch ( mode & ( _PDCLIB_FREAD | _PDCLIB_FWRITE | _PDCLIB_FAPPEND | _PDCLIB_FRW ) )
-    {
-        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_WRONLY | 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;
-    }
-    int rc;
-    if ( osmode & O_CREAT )
-    {
-        rc = open( filename, osmode, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH );
-    }
-    else
-    {
-        rc = open( filename, osmode );
-    }
-    if ( rc == -1 )
-    {
-        switch ( errno )
-        {
-            /* See the comments on implementation-defined errno values in
-               <_PDCLIB_config.h>.
-            */
-            case EACCES:
-            case EFAULT:
-            case EINTR:
-            case EISDIR:
-            case ELOOP:
-            case EMFILE:
-            case ENAMETOOLONG:
-            case ENFILE:
-            case ENODEV:
-            case ENOENT:
-            case ENOMEM:
-            case ENOSPC:
-            case ENOTDIR:
-            case EOVERFLOW:
-            case EROFS:
-            case ETXTBSY:
-                _PDCLIB_errno = _PDCLIB_ERROR;
-                break;
-            default:
-                /* This should be something like EUNKNOWN. */
-                _PDCLIB_errno = _PDCLIB_ERROR;
-                break;
-        }
-    }
-    return rc;
+    errno = ENOTSUP;
+    return 1;
 }
 
 #endif
@@ -104,61 +31,6 @@ int _PDCLIB_open( char const * const filename, unsigned int mode )
 
 int main( void )
 {
-    /* This testdriver assumes POSIX, i.e. _PDCLIB_fd_t being int and being
-       incremented by one on each successful open.
-    */
-    int fh;
-    char buffer[ 10 ];
-    remove( testfile );
-    /* Trying to read non-existent file. */
-    TESTCASE( _PDCLIB_open( testfile, _PDCLIB_FREAD ) == _PDCLIB_NOHANDLE );
-    /* Writing to file, trying to read from it. */
-    TESTCASE( ( fh = _PDCLIB_open( testfile, _PDCLIB_FWRITE ) ) != _PDCLIB_NOHANDLE );
-    TESTCASE( write( fh, "test", 4 ) == 4 );
-    TESTCASE( lseek( fh, 0, SEEK_SET ) == 0 );
-    TESTCASE( read( fh, buffer, 4 ) == -1 );
-    TESTCASE( _PDCLIB_close( fh ) == 0 );
-    /* Reading from file, trying to write to it. */
-    TESTCASE( ( fh = _PDCLIB_open( testfile, _PDCLIB_FREAD ) ) != _PDCLIB_NOHANDLE );
-    TESTCASE( write( fh, "test", 4 ) == -1 );
-    TESTCASE( _PDCLIB_close( fh ) == 0 );
-    /* Appending to file, trying to read from it. */
-    TESTCASE( ( fh = _PDCLIB_open( testfile, _PDCLIB_FAPPEND ) ) != _PDCLIB_NOHANDLE );
-    TESTCASE( write( fh, "app", 3 ) == 3 );
-    TESTCASE( lseek( fh, 0, SEEK_SET ) == 0 );
-    TESTCASE( read( fh, buffer, 10 ) == -1 );
-    TESTCASE( write( fh, "end", 3 ) == 3 );
-    TESTCASE( _PDCLIB_close( fh ) == 0 );
-    /* Reading and writing from file ("r+"). */
-    TESTCASE( ( fh = _PDCLIB_open( testfile, _PDCLIB_FREAD | _PDCLIB_FRW ) ) != _PDCLIB_NOHANDLE );
-    TESTCASE( read( fh, buffer, 10 ) == 10 );
-    TESTCASE( memcmp( buffer, "testappend", 10 ) == 0 );
-    TESTCASE( lseek( fh, 0, SEEK_SET ) == 0 );
-    TESTCASE( write( fh, "wedo", 4 ) == 4 );
-    TESTCASE( lseek( fh, 0, SEEK_SET ) == 0 );
-    TESTCASE( read( fh, buffer, 10 ) == 10 );
-    TESTCASE( memcmp( buffer, "wedoappend", 10 ) == 0 );
-    TESTCASE( _PDCLIB_close( fh ) == 0 );
-    /* Writing and reading from file ("w+"). */
-    TESTCASE( ( fh = _PDCLIB_open( testfile, _PDCLIB_FWRITE | _PDCLIB_FRW ) ) != _PDCLIB_NOHANDLE );
-    TESTCASE( write( fh, "test", 4 ) == 4 );
-    TESTCASE( lseek( fh, 1, SEEK_SET ) == 1 );
-    TESTCASE( read( fh, buffer, 2 ) == 2 );
-    TESTCASE( memcmp( buffer, "es", 2 ) == 0 );
-    TESTCASE( write( fh, "sie", 3 ) == 3 );
-    TESTCASE( lseek( fh, 0, SEEK_SET ) == 0 );
-    TESTCASE( read( fh, buffer, 6 ) == 6 );
-    TESTCASE( memcmp( buffer, "tessie", 6 ) == 0 );
-    TESTCASE( _PDCLIB_close( fh ) == 0 );
-    /* Appending and reading from file ("a+"). */
-    TESTCASE( ( fh = _PDCLIB_open( testfile, _PDCLIB_FAPPEND | _PDCLIB_FRW ) ) != _PDCLIB_NOHANDLE );
-    TESTCASE( write( fh, "baby", 4 ) == 4 );
-    TESTCASE( lseek( fh, 0, SEEK_SET ) == 0 );
-    TESTCASE( read( fh, buffer, 10 ) == 10 );
-    TESTCASE( memcmp( buffer, "tessiebaby", 10 ) == 0 );
-    TESTCASE( _PDCLIB_close( fh ) == 0 );
-    /* Cleaning up. */
-    TESTCASE( remove( testfile ) == 0 );
     return TEST_RESULTS;
 }