[avr-libc-dev] [bugs #11494] strtol() return wrong value in the underflow case

[Eric Weddington]

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It relates to:
                bugs #11494, project AVR C Runtime Library

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 LATEST MODIFICATIONS of bugs #11494:
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               Posted by: Eric Weddington <arcanum>
               Posted on: 2005-01-10 21:48 (America/Denver)
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                Priority:                7 - High -> 9 - Immediate          


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 OVERVIEW of bugs #11494:
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URL:
  <http://savannah.nongnu.org/bugs/?func=detailitem&item_id=11494>

                 Summary: strtol() return wrong value in the underflow case
                 Project: AVR C Runtime Library
            Submitted by: None
            Submitted on: Wed 01/05/2005 at 07:31
                Category: Library
                Severity: 5 - Average
                Priority: 9 - Immediate
              Item Group: None
                  Status: None
                 Privacy: Public
        Percent Complete: 0%
             Assigned to: None
        Originator Email: address@hidden
             Open/Closed: Open

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This is very old bug.
strtol() must return LONG_MIN for inputs too small.
Original Berkeley version do it.  But avr-libc's version, for example,
"-5000000000" --> -705032704 (simulavr, avr-gcc 3.3.4). You can reproduce
such result on any 32-bit computer.

The reason is the attemption to negative LONG_MIN value (0x80000000).
Attached patch correct this mistake. (And it excude compiler warnings in
comparison).

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Follow-up Comments:


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Date: Thu 01/06/2005 at 07:29       By: Anonymous
Look, please, the optimized strtol, patch #3618. Twice speed up, and 32 bytes
stack usage decrease. Code size the same.







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File Attachments:


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Date: Wed 01/05/2005 at 07:31  Name: strtol-20050105.diff  Size: 856B   By:
None
Patch for strtol.c (from avr-libc-1.2.0)
<http://savannah.nongnu.org/bugs/download.php?item_id=11494&item_file_id=2025>

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  <http://savannah.nongnu.org/bugs/?func=detailitem&item_id=11494>

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