updf_revert

updf_revert reverts all modifications since the last open or commit command (updf_commit).

bool = updf_revert(stg)

Return Value

If the function succeeds, the return value is TRUE (1); otherwise it is FALSE (0).

Parameters

stg

stg is a storage object (see updf_create_file, updf_open_file, updf_create_storage).

Example

def test_updf_revert()
{
    ssPath = GetTempPath();

    stg = updf_create_file(ssPath + "test.updf");
    f = updf_create_stream(stg, "test");
    fwrite_int8(f, 1:100);
    updf_file_close(f);
    updf_close_storage(stg);

    stg = updf_open_file(ssPath + "test.updf");

    f = updf_open_stream(stg, "test");
    fwrite_int8(f, 120);
    updf_file_close(f);

    updf_revert(stg);

    f = updf_open_stream(stg, "test");
    i8 = fread_int8(f, 1);
    if (i8 == 120) {
        error();
    }
    updf_file_close(f);

    updf_close_storage(stg);
}

test_updf_revert();

History

Version	Description
5.6.0	New

See also

Overview UPDF Files

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