+ /* 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 );