bugidutils - Bugs: bug #44982, Incorrectly formed calls to...

 
 

bug #44982: Incorrectly formed calls to <ctype.h> functions

Submitted by:  None
Submitted on:  Fri 01 May 2015 05:25:49 PM UTC  
 
Category: NoneSeverity: 3 - Normal
Item Group: NoneStatus: None
Privacy: PublicAssigned to: None
Open/Closed: Open

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Fri 01 May 2015 05:25:49 PM UTC, original submission:

libidu/scanners.c and src/lid.c contain multiple calls to Standard C Library entries from the <ctype.h> group: isdigit(), isspace(), isxdigit(), islower() and isalnum().

These functions work on characters, yet their argument type is int, and actual input is required to be either values <i>representable as unsigned char</i>, or EOF. If you want to pass a generic char argument to any of these functions, it <b>must</b> be cast to unsigned char first. On platforms where char == unsigned char, that might work all by itself, but that's not something portable code may assume.

Anonymous

 

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