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CCS/TM4C129ENCPDT: bug in strtol

Peng
Intellectual 350 points
Part Number: TM4C129ENCPDT


Tool/software: Code Composer Studio

Hi,

I use strtol function to convert "0xFFFFFFFF" to a uint32_t data. However, I got an error due to result out of range. Tracing into the function, I noticed that the maximum result was set to 0x07FFFFFF. Please see the attached picture.I tried to change the LONG_MAX definition, but could not find it.

Is there a reason to set the maximum value to be 0x07FFFFFF? How to fix this to covert value higher than 0x07FFFFFFF?

thanks

Peng

  • 0
    TI__Guru**** 251230 points

    Peng Peng said:
    Is there a reason to set the maximum value to be 0x07FFFFFF?

    Yes.  That is the maximum signed value you can represent in 32-bits.  Remember, if the most significant bit is set, then it is a negative value.  

    If you need to work with positive values higher than 0x7FFFFFFF, then you must use a different type.  Consider using unsigned long or long long.  And don't forget to change from strol to strtoul or strtoll.  

    Thanks and regards,

    -George

  • 0 in reply to George Mock
    Intellectual 350 points

    George,

    Thanks for the reminder. I guess I was confused by the 0x07FFFFFFF. Checked the code again, that was the value before the last number. So it makes sense now. 

    Peng