musl - musl - an implementation of the standard library for Linux-based systems

musl - an implementation of the standard library for Linux-based systems

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author	Szabolcs Nagy <nsz@port70.net>	2015年03月22日 18:32:55 +0000
committer	Rich Felker <dalias@aerifal.cx>	2015年03月23日 12:28:49 -0400
commit	32dee9b9b1e557a73cc4427455cd00cb2571436c (patch)
tree	4a449ad0502c4591e977e8e982a0adc8d1633bf0 /src/regex/regcomp.c
parent	11d1e2e2ded07673411ba872c1e3d0096dc79439 (diff)
download	musl-32dee9b9b1e557a73cc4427455cd00cb2571436c.tar.gz

do not treat 0円 as a backref in BRE

The valid BRE backref tokens are 1円 .. 9,円 and 0 is not a special character either so 0円 is undefined by the standard. Such undefined escaped characters are treated as literal characters currently, following existing practice, so 0円 is the same as 0.

Diffstat (limited to 'src/regex/regcomp.c')

-rw-r--r--

src/regex/regcomp.c

1 files changed, 1 insertions, 1 deletions

diff --git a/src/regex/regcomp.c b/src/regex/regcomp.c
index 4d80cb1c..dfa9727c 100644
--- a/src/regex/regcomp.c
+++ b/src/regex/regcomp.c

@@ -839,7 +839,7 @@ static reg_errcode_t parse_atom(tre_parse_ctx_t *ctx, const char *s)

s--;

break;

default:

- if (!ere && isdigit(*s)) {

+ if (!ere && (unsigned)*s-'1' < 9) {

/* back reference */

int val = *s - '0';

node = tre_ast_new_literal(ctx->mem, BACKREF, val, ctx->position);

generated by cgit v1.2.1 (git 2.18.0) at 2025年09月08日 19:12:55 +0000