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authorUlrich Drepper <drepper@redhat.com>2004-11-08 22:49:44 +0000
committerUlrich Drepper <drepper@redhat.com>2004-11-08 22:49:44 +0000
commite40a38b383fdbc616eb110e7cd6f780d010783cc (patch)
tree5a5a8e9acbf760879b7eefcc46414f1454199eea /posix/regcomp.c
parentd2c38eb3facb84db061289f20ff8a210f91e4115 (diff)
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Update.
2004-11-08 Ulrich Drepper <drepper@redhat.com> * posix/regcomp.c (utf8_sb_map): Define. (free_dfa_content): Don't free dfa->sb_char if it's a pointer to utf8_sb_map. (init_dfa): Use utf8_sb_map instead of initializing memory when the encoding is UTF-8. * posix/regcomp.c (init_dfa): Get the codeset name outside glibc as well. Check if it is spelled UTF8 as well as UTF-8, and check case-insensitively. Set dfa->map_notascii manually when outside glibc. * posix/regex_internal.c (build_wcs_upper_buffer) [!_LIBC]: Enable optimizations based on map_notascii. * posix/regex_internal.h [HAVE_LANGINFO_H || HAVE_LANGINFO_CODESET || _LIBC]: Include langinfo.h. * posix/regex_internal.h (struct re_backref_cache_entry): Add "more" field. * posix/regexec.c (check_dst_limits): Hoist computation of the source and destination bkref_idx out of the loop. Pass it to check_dst_limits_calc_pos. (check_dst_limits_calc_pos_1): New function, containing the recursive loop of check_dst_limits_calc_pos; uses the "more" field of struct re_backref_cache to control the loop. (check_dst_limits_calc_pos): Store into "boundaries" the position relative to lim's start and end positions. Do not accept eclosures, accept bkref_idx instead. Call check_dst_limits_calc_pos_1 to do the work. (sift_states_bkref): Use the "more" field of struct re_backref_cache to control the loop. A big "if" was turned into a continue and the function was reindented. (get_subexp): Use the "more" field of struct re_backref_cache to control the loop. (match_ctx_add_entry): Initialize the bkref_ents' "more" field. (search_cur_bkref_entry): Return -1 if out of bounds. * posix/regexec.c (empty_set): Remove. (sift_states_backward): Remove cur_src variable. Move inner loop to build_sifted_states. (build_sifted_states): Extract from sift_states_backward. Do not use empty_set. (update_cur_sifted_state): Do not use empty_set. Special case dest_nodes->nelem == 0.
Diffstat (limited to 'posix/regcomp.c')
-rw-r--r--posix/regcomp.c80
1 files changed, 69 insertions, 11 deletions
diff --git a/posix/regcomp.c b/posix/regcomp.c
index 9b435a8..bdd616d 100644
--- a/posix/regcomp.c
+++ b/posix/regcomp.c
@@ -566,6 +566,23 @@ weak_alias (__regerror, regerror)
#endif
+#ifdef RE_ENABLE_I18N
+/* This static array is used for the map to single-byte characters when
+ UTF-8 is used. Otherwise we would allocate memory just to initialize
+ it the same all the time. UTF-8 is the preferred encoding so this is
+ a worthwhile optimization. */
+static const bitset utf8_sb_map =
+{
+ /* Set the first 128 bits. */
+# if UINT_MAX == 0xffffffff
+ 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff
+# else
+# error "Add case for new unsigned int size"
+# endif
+};
+#endif
+
+
static void
free_dfa_content (re_dfa_t *dfa)
{
@@ -613,7 +630,8 @@ free_dfa_content (re_dfa_t *dfa)
}
re_free (dfa->state_table);
#ifdef RE_ENABLE_I18N
- re_free (dfa->sb_char);
+ if (dfa->sb_char != utf8_sb_map)
+ re_free (dfa->sb_char);
#endif
#ifdef DEBUG
re_free (dfa->re_str);
@@ -824,6 +842,9 @@ init_dfa (dfa, pat_len)
int pat_len;
{
int table_size;
+#ifndef _LIBC
+ char *codeset_name;
+#endif
memset (dfa, '\0', sizeof (re_dfa_t));
@@ -853,22 +874,59 @@ init_dfa (dfa, pat_len)
dfa->is_utf8 = 1;
dfa->map_notascii = (_NL_CURRENT_WORD (LC_CTYPE, _NL_CTYPE_MAP_TO_NONASCII)
!= 0);
+#else
+# ifdef HAVE_LANGINFO_CODESET
+ codeset_name = nl_langinfo (CODESET);
+# else
+ codeset_name = getenv ("LC_ALL");
+ if (codeset_name == NULL || codeset[0] == '\0')
+ codeset_name = getenv ("LC_CTYPE");
+ if (codeset_name == NULL || codeset[0] == '\0')
+ codeset_name = getenv ("LANG");
+ if (codeset_name == NULL)
+ codeset_name = "";
+ else if (strchr (codeset_name, '.') != NULL)
+ codeset_name = strchr (codeset_name, '.') + 1;
+# endif
+
+ if (strcasecmp (codeset_name, "UTF-8") == 0
+ || strcasecmp (codeset_name, "UTF8") == 0)
+ dfa->is_utf8 = 1;
+
+ /* We check exhaustively in the loop below if this charset is a
+ superset of ASCII. */
+ dfa->map_notascii = 0;
#endif
+
#ifdef RE_ENABLE_I18N
if (dfa->mb_cur_max > 1)
{
- int i, j, ch;
-
- dfa->sb_char = (re_bitset_ptr_t) calloc (sizeof (bitset), 1);
- if (BE (dfa->sb_char == NULL, 0))
- return REG_ESPACE;
if (dfa->is_utf8)
- memset (dfa->sb_char, 255, sizeof (unsigned int) * BITSET_UINTS / 2);
+ dfa->sb_char = (re_bitset_ptr_t) utf8_sb_map;
else
- for (i = 0, ch = 0; i < BITSET_UINTS; ++i)
- for (j = 0; j < UINT_BITS; ++j, ++ch)
- if (__btowc (ch) != WEOF)
- dfa->sb_char[i] |= 1 << j;
+ {
+ int i, j, ch;
+
+ dfa->sb_char = (re_bitset_ptr_t) calloc (sizeof (bitset), 1);
+ if (BE (dfa->sb_char == NULL, 0))
+ return REG_ESPACE;
+
+ /* Clear all bits by, then set those corresponding to single
+ byte chars. */
+ bitset_empty (dfa->sb_char);
+
+ for (i = 0, ch = 0; i < BITSET_UINTS; ++i)
+ for (j = 0; j < UINT_BITS; ++j, ++ch)
+ {
+ wchar_t wch = __btowc (ch);
+ if (wch != WEOF)
+ dfa->sb_char[i] |= 1 << j;
+# ifndef _LIBC
+ if (isascii (ch) && wch != (wchar_t) ch)
+ dfa->map_notascii = 1;
+# endif
+ }
+ }
}
#endif