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| author | Szabolcs Nagy <nsz@port70.net> | 2016-02-29 16:36:25 +0000 |
|---|---|---|
| committer | Rich Felker <dalias@aerifal.cx> | 2016-03-02 00:47:22 -0500 |
| commit | 29b13575376509bb21539711f30c1deaf0823033 (patch) | |
| tree | a562ad6c465f6f33d0cb534d6a80a5e85bd681b3 | |
| parent | 39ea71fb8afddda879a1999f2a203dfdaf57a639 (diff) | |
| download | musl-29b13575376509bb21539711f30c1deaf0823033.tar.gz musl-29b13575376509bb21539711f30c1deaf0823033.tar.xz musl-29b13575376509bb21539711f30c1deaf0823033.zip | |
fix ^* at the start of a complete BRE
This is a workaround to treat * as literal * at the start of a BRE. Ideally ^ would be treated as an anchor at the start of any BRE subexpression and similarly $ would be an anchor at the end of any subexpression. This is not required by the standard and hard to do with the current code, but it's the existing practice. If it is changed, * should be treated as literal after such anchor as well.
| -rw-r--r-- | src/regex/regcomp.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/src/regex/regcomp.c b/src/regex/regcomp.c index 7a2864cd..5fad98b3 100644 --- a/src/regex/regcomp.c +++ b/src/regex/regcomp.c @@ -994,6 +994,10 @@ static reg_errcode_t tre_parse(tre_parse_ctx_t *ctx) if (*s=='\\') s++; + /* handle ^* at the start of a complete BRE. */ + if (!ere && s==ctx->re+1 && s[-1]=='^') + break; + /* extension: multiple consecutive *+?{,} is unspecified, but (a+)+ has to be supported so accepting a++ makes sense, note however that the RE_DUP_MAX limit can be |