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2003-09-20  Paolo Bonzini  <bonzini@gnu.org>

	* posix/regcomp.c (peek_token): Don't look back for ( or |
	to check whether to treat a caret as special.  It fails
	for the (extended) regex \(^.
	(parse, parse_reg_exp): Pass RE_CARET_ANCHORS_HERE to fetch_token.
	* posix/regex.h: Define RE_CARET_ANCHORS_HERE.

	* posix/regexec.c: Check out of bounds value before shifting.

	* posix/regex_internal.h: Define __attribute for non-gcc.
This commit is contained in:
Ulrich Drepper 2003-09-23 05:33:43 +00:00
parent 571f2090f8
commit ce85933261
5 changed files with 28 additions and 5 deletions
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12
ChangeLog
View File

@ -1,3 +1,15 @@
2003-09-20 Paolo Bonzini <bonzini@gnu.org>
* posix/regcomp.c (peek_token): Don't look back for ( or |
to check whether to treat a caret as special. It fails
for the (extended) regex \(^.
(parse, parse_reg_exp): Pass RE_CARET_ANCHORS_HERE to fetch_token.
* posix/regex.h: Define RE_CARET_ANCHORS_HERE.
* posix/regexec.c: Check out of bounds value before shifting.
* posix/regex_internal.h: Define __attribute for non-gcc.
2003-09-22 Jakub Jelinek <jakub@redhat.com>
* include/atomic.h (atomic_compare_and_exchange_val_rel,

9
posix/regcomp.c
View File

@ -1650,12 +1650,11 @@ peek_token (token, input, syntax)
token->type = OP_PERIOD;
break;
case '^':
if (!(syntax & RE_CONTEXT_INDEP_ANCHORS) &&
if (!(syntax & (RE_CONTEXT_INDEP_ANCHORS | RE_CARET_ANCHORS_HERE)) &&
re_string_cur_idx (input) != 0)
{
char prev = re_string_peek_byte (input, -1);
if (prev != '|' && prev != '(' &&
(!(syntax & RE_NEWLINE_ALT) || prev != '\n'))
if (!(syntax & RE_NEWLINE_ALT) || prev != '\n')
break;
}
token->type = ANCHOR;
@ -1790,7 +1789,7 @@ parse (regexp, preg, syntax, err)
bin_tree_t *tree, *eor, *root;
re_token_t current_token;
int new_idx;
current_token = fetch_token (regexp, syntax);
current_token = fetch_token (regexp, syntax | RE_CARET_ANCHORS_HERE);
tree = parse_reg_exp (regexp, preg, &current_token, syntax, 0, err);
if (BE (*err != REG_NOERROR && tree == NULL, 0))
return NULL;
@ -1837,7 +1836,7 @@ parse_reg_exp (regexp, preg, token, syntax, nest, err)
{
re_token_t alt_token = *token;
new_idx = re_dfa_add_node (dfa, alt_token, 0);
*token = fetch_token (regexp, syntax);
*token = fetch_token (regexp, syntax | RE_CARET_ANCHORS_HERE);
if (token->type != OP_ALT && token->type != END_OF_RE
&& (nest == 0 || token->type != OP_CLOSE_SUBEXP))
{

5
posix/regex.h
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@ -170,6 +170,11 @@ typedef unsigned long int reg_syntax_t;
If not set, then case is significant. */
#define RE_ICASE (RE_INVALID_INTERVAL_ORD << 1)
/* This bit is used internally like RE_CONTEXT_INDEP_ANCHORS but only
for ^, because it is difficult to scan the regex backwards to find
whether ^ should be special. */
#define RE_CARET_ANCHORS_HERE (RE_ICASE << 1)
/* This global variable defines the particular regexp syntax to use (for
some interfaces). When a regexp is compiled, the syntax used is
stored in the pattern buffer, so changing this does not affect

6
posix/regex_internal.h
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@ -106,6 +106,12 @@
# define attribute_hidden
#endif /* not _LIBC */
#ifdef __GNUC__
# define __attribute __attribute__
#else
# define __attribute
#endif
extern const char __re_error_msgid[] attribute_hidden;
extern const size_t __re_error_msgid_idx[] attribute_hidden;

1
posix/regexec.c
View File

@ -2193,6 +2193,7 @@ check_subexp_matching_top (dfa, mctx, cur_nodes, str_idx)
{
int node = cur_nodes->elems[node_idx];
if (dfa->nodes[node].type == OP_OPEN_SUBEXP
&& dfa->nodes[node].opr.idx < (8 * sizeof (dfa->used_bkref_map))
&& dfa->used_bkref_map & (1 << dfa->nodes[node].opr.idx))
{
err = match_ctx_add_subtop (mctx, node, str_idx);