From 56b09feb23d98fcd0c4aed8d4f907a5a2f6b5ea9 Mon Sep 17 00:00:00 2001 From: Christos Zoulas Date: Wed, 30 Aug 2023 20:37:24 +0000 Subject: regcomp: use unsigned char when testing for escapes - cast GETNEXT to unsigned where it is being promoted to int to prevent sign-extension (really it would have been better for PEEK*() and GETNEXT() to return unsigned char; this would have removed a ton of (uch) casts, but it is too intrusive for now). - fix an isalpha that should have been iswalpha PR: 264275, 274032 Reviewed by: kevans, eugen (previous version) Obtained from: NetBSD (cherry picked from commit 3fb80f1476c7776f04ba7ef6d08397cef6abcfb0) --- lib/libc/regex/regcomp.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/lib/libc/regex/regcomp.c b/lib/libc/regex/regcomp.c index 791755ceb14d..42fa1b99e58e 100644 --- a/lib/libc/regex/regcomp.c +++ b/lib/libc/regex/regcomp.c @@ -828,10 +828,10 @@ p_simp_re(struct parse *p, struct branchc *bc) handled = false; assert(MORE()); /* caller should have ensured this */ - c = GETNEXT(); + c = (uch)GETNEXT(); if (c == '\\') { (void)REQUIRE(MORE(), REG_EESCAPE); - cc = GETNEXT(); + cc = (uch)GETNEXT(); c = BACKSL | cc; #ifdef LIBREGEX if (p->gnuext) { @@ -992,7 +992,7 @@ p_count(struct parse *p) int ndigits = 0; while (MORE() && isdigit((uch)PEEK()) && count <= DUPMAX) { - count = count*10 + (GETNEXT() - '0'); + count = count*10 + ((uch)GETNEXT() - '0'); ndigits++; } @@ -1302,7 +1302,7 @@ may_escape(struct parse *p, const wint_t ch) if ((p->pflags & PFLAG_LEGACY_ESC) != 0) return (true); - if (isalpha(ch) || ch == '\'' || ch == '`') + if (iswalpha(ch) || ch == '\'' || ch == '`') return (false); return (true); #ifdef NOTYET -- cgit v1.2.3