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Don't buffer overflow when trying to process source bytes with the high bit

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set.
This commit is contained in:
David Given 2019-03-11 13:50:30 +00:00
parent 88fd7b3cdc
commit c59eae1429
1 changed files with 6 additions and 6 deletions
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12
lang/cem/cpp.ansi/class.h
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@ -10,7 +10,7 @@
At present such a class number is supposed to fit in 4 bits. At present such a class number is supposed to fit in 4 bits.
*/ */
#define class(ch) ((tkclass)[(unsigned int)ch]) #define class(ch) ((tkclass)[(unsigned char)ch])
/* Being the start of a token is, fortunately, a mutual exclusive /* Being the start of a token is, fortunately, a mutual exclusive
property, so, as there are less than 16 classes they can be property, so, as there are less than 16 classes they can be
@ -37,11 +37,11 @@
class. This is implemented as a collection of tables to speed up class. This is implemented as a collection of tables to speed up
the decision whether a character has a special meaning. the decision whether a character has a special meaning.
*/ */
#define in_idf(ch) (inidf[(unsigned int)ch]) #define in_idf(ch) (inidf[(unsigned char)ch])
#define is_oct(ch) (isoct[(unsigned int)ch]) #define is_oct(ch) (isoct[(unsigned char)ch])
#define is_dig(ch) (isdig[(unsigned int)ch]) #define is_dig(ch) (isdig[(unsigned char)ch])
#define is_hex(ch) (ishex[(unsigned int)ch]) #define is_hex(ch) (ishex[(unsigned char)ch])
#define is_wsp(ch) (iswsp[(unsigned int)ch]) #define is_wsp(ch) (iswsp[(unsigned char)ch])
extern char tkclass[]; extern char tkclass[];
extern char inidf[], isoct[], isdig[], ishex[], iswsp[]; extern char inidf[], isoct[], isdig[], ishex[], iswsp[];