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Avoid typecasting a signed char to an int when using is*() functions, as that

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could very well cause a negate number get passed in and thus cause reading
outside of the array usually used for this purpose.

We avoid this by using the uppercase macro versions introduced just now that
does some extra crazy typecasts to avoid byte codes > 127 to cause negative
int values.
This commit is contained in:
Daniel Stenberg 2006-10-17 21:32:56 +00:00
parent 930f9bd534
commit 44d84ac164
17 changed files with 81 additions and 59 deletions
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10
lib/setup.h
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@ -348,6 +348,16 @@ int fileno( FILE *stream);
#define DEBUGF(x)
#endif
#ifndef ISSPACE
/* typecasting craze to avoid negative number inputs to these macros */
#define ISSPACE(x) (isspace((int)((unsigned char)x)))
#define ISDIGIT(x) (isdigit((int)((unsigned char)x)))
#define ISALNUM(x) (isalnum((int)((unsigned char)x)))
#define ISXDIGIT(x) (isxdigit((int)((unsigned char)x)))
#define ISGRAPH(x) (isgraph((int)((unsigned char)x)))
#define ISALPHA(x) (isalpha((int)((unsigned char)x)))
#endif
/*
* Include macros and defines that should only be processed once.
*/