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Problem Report 0087 Details

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Report 0087 Actions

    Problem Report Number 0087
    Submitter's Classification Test Suite problem
    State Resolved
    Resolution Test Suite Deficiency (TSD)
    Problem Resolution ID TSD.X.0087
    Raised 1993-08-25 08:00
    Updated 2003-03-13 08:00
    Published 1993-09-03 08:00
    Product Standard Internationalised System Calls and Libraries (XPG4)
    Certification Program The Open Brand certification program
    Test Suite VSX4 version 4.2.4
    Test Identification ANSI.os/string/strxfrm_X 1 3 4
    Problem Summary TSD4.087 These tests assume that the transformed strings can be stored in 25 bytes or constant number of bytes. However, the standard says: "The fact that when n is zero, s1 is permitted to be a null pointer, ...
    Problem Text
    These tests assume that the transformed strings can be stored in 25 bytes or
    constant number of bytes.
    However, the standard says:
    "The fact that when n is zero, s1 is permitted to be a null pointer, is useful
    to determine the size of the s1 array prior to making the transformation"

    So, the right way before applying the function is to call it with n=0 to
    determine the bytes needed for the transformation and then applying
    the transformation.
    For example, the following code sequence is in error:

    (void) strcpy(buf2, "bern");
    (void) asc_to_psl(buf2, VALINFO1LANG);
    (void) strxfrm(buf1, buf2, (size_t)25);
    expect = strlen(buf1);
    retval = (int) strxfrm(buf3, buf2, (size_t)(expect-1));


    The correct way to write this test is:

    (void) strcpy(buf2, "bern");
    (void) asc_to_psl(buf2, VALINFO1LANG);
    expect = strxfrm(NULL, buf2, 0);
    retval = (int) strxfrm(buf3, buf2, (size_t)(expect-1));


    Same problem exists in test 1 and 3 of strxfrm().
    Test Output
    /tset/ANSI.os/string/strxfrm_X/T.strxfrm_X 4 Failed

    Test Description:
    The return value gives the length of string that is required to hold
    the transformation of the string s2 (This value may exceed the value
    of n).

    Test Strategy:
    CREATE child process
    VERIFY that the maximum size of the string is returned when size
    argument < required size.

    Test Information:
    If the returned string exceeds the length set in the 3rd argument, the
    required length is returned
    Current language setting is VSX4L1
    strxfrm did not return expected value
    value of string to be transformed (4245534e)
    expected return value : 20
    actual return value : 40

    Review Information

    Review Type TSMA Review
    Start Date null
    Completed null
    Status Complete
    Review Recommendation No Resolution Given
    Review Response
    The alternative strategy provided in the accompanying text suufers from the
    weakness that it assumes that the return from strxfrm(NULL, buf2, 0) will
    be correct. Since the test is verifying the accuracy of strxfrm(), this
    cannot be considered to be a good strategy.

    I assume that the DEC system allows for 10 collating levels and uses
    one byte for each collating level when generating the string. If this
    is correct, a string length of 40 would be required for the transformation
    of the four byte string. In this case the implementation is working
    correctly and it is accepted that this is a test suite deficiency.

    Review Type SA Review
    Start Date null
    Completed null
    Status Complete
    Review Resolution Test Suite Deficiency (TSD)
    Review Conclusion
    This is an agreed test suite deficiency.

    Problem Reporting System Options:

     

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