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LibC: Don't let ctype isfoo() helpers access array out of bounds

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This commit is contained in:
Andreas Kling 2020-05-17 20:01:08 +02:00
parent 35875b68f5
commit b3f6b43d3c
Notes: sideshowbarker 2024-07-19 06:33:24 +09:00 
Author: https://github.com/awesomekling
Commit: https://github.com/SerenityOS/serenity/commit/b3f6b43d3c4
1 changed files with 11 additions and 11 deletions
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22
Libraries/LibC/ctype.h
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@ -57,17 +57,17 @@ int isgraph(int);
int islower(int); int islower(int);
int isupper(int); int isupper(int);
#define isalnum(c) (_ctype_[(int)(c)] & (_U | _L | _N)) #define isalnum(c) (_ctype_[(unsigned char)(c)] & (_U | _L | _N))
#define isalpha(c) (_ctype_[(int)(c)] & (_U | _L)) #define isalpha(c) (_ctype_[(unsigned char)(c)] & (_U | _L))
#define iscntrl(c) (_ctype_[(int)(c)] & (_C)) #define iscntrl(c) (_ctype_[(unsigned char)(c)] & (_C))
#define isdigit(c) (_ctype_[(int)(c)] & (_N)) #define isdigit(c) (_ctype_[(unsigned char)(c)] & (_N))
#define isxdigit(c) (_ctype_[(int)(c)] & (_N | _X)) #define isxdigit(c) (_ctype_[(unsigned char)(c)] & (_N | _X))
#define isspace(c) (_ctype_[(int)(c)] & (_S)) #define isspace(c) (_ctype_[(unsigned char)(c)] & (_S))
#define ispunct(c) (_ctype_[(int)(c)] & (_P)) #define ispunct(c) (_ctype_[(unsigned char)(c)] & (_P))
#define isprint(c) (_ctype_[(int)(c)] & (_P | _U | _L | _N | _B)) #define isprint(c) (_ctype_[(unsigned char)(c)] & (_P | _U | _L | _N | _B))
#define isgraph(c) (_ctype_[(int)(c)] & (_P | _U | _L | _N)) #define isgraph(c) (_ctype_[(unsigned char)(c)] & (_P | _U | _L | _N))
#define islower(c) ((_ctype_[(int)(c)] & (_U | _L)) == _L) #define islower(c) ((_ctype_[(unsigned char)(c)] & (_U | _L)) == _L)
#define isupper(c) ((_ctype_[(int)(c)] & (_U | _L)) == _U) #define isupper(c) ((_ctype_[(unsigned char)(c)] & (_U | _L)) == _U)
#define isascii(c) ((unsigned)c <= 127) #define isascii(c) ((unsigned)c <= 127)
#define toascii(c) ((c)&127) #define toascii(c) ((c)&127)