diff options
Diffstat (limited to 'lib/libc/regex')
| -rw-r--r-- | lib/libc/regex/regcomp.c | 26 |
1 files changed, 14 insertions, 12 deletions
diff --git a/lib/libc/regex/regcomp.c b/lib/libc/regex/regcomp.c index 00ab6a77141b..fc66ea32046a 100644 --- a/lib/libc/regex/regcomp.c +++ b/lib/libc/regex/regcomp.c @@ -177,10 +177,10 @@ static char nuls[10]; /* place to point scanner in event of error */ */ #define PEEK() (*p->next) #define PEEK2() (*(p->next+1)) -#define MORE() (p->next < p->end) -#define MORE2() (p->next+1 < p->end) +#define MORE() (p->end - p->next > 0) +#define MORE2() (p->end - p->next > 1) #define SEE(c) (MORE() && PEEK() == (c)) -#define SEETWO(a, b) (MORE() && MORE2() && PEEK() == (a) && PEEK2() == (b)) +#define SEETWO(a, b) (MORE2() && PEEK() == (a) && PEEK2() == (b)) #define SEESPEC(a) (p->bre ? SEETWO('\\', a) : SEE(a)) #define EAT(c) ((SEE(c)) ? (NEXT(), 1) : 0) #define EATTWO(a, b) ((SEETWO(a, b)) ? (NEXT2(), 1) : 0) @@ -997,15 +997,17 @@ p_bracket(struct parse *p) wint_t ch; /* Dept of Truly Sickening Special-Case Kludges */ - if (p->next + 5 < p->end && strncmp(p->next, "[:<:]]", 6) == 0) { - EMIT(OBOW, 0); - NEXTn(6); - return; - } - if (p->next + 5 < p->end && strncmp(p->next, "[:>:]]", 6) == 0) { - EMIT(OEOW, 0); - NEXTn(6); - return; + if (p->end - p->next > 5) { + if (strncmp(p->next, "[:<:]]", 6) == 0) { + EMIT(OBOW, 0); + NEXTn(6); + return; + } + if (strncmp(p->next, "[:>:]]", 6) == 0) { + EMIT(OEOW, 0); + NEXTn(6); + return; + } } if ((cs = allocset(p)) == NULL) |