diff options
Diffstat (limited to 'posix/regcomp.c')
| -rw-r--r-- | posix/regcomp.c | 1483 |
1 files changed, 679 insertions, 804 deletions
diff --git a/posix/regcomp.c b/posix/regcomp.c index 5de5bf725a..e99fd74924 100644 --- a/posix/regcomp.c +++ b/posix/regcomp.c @@ -1,5 +1,5 @@ /* Extended regular expression matching and search library. - Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc. + Copyright (C) 2002,2003,2004,2005,2006,2007 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>. @@ -19,12 +19,11 @@ 02111-1307 USA. */ static reg_errcode_t re_compile_internal (regex_t *preg, const char * pattern, - int length, reg_syntax_t syntax); + size_t length, reg_syntax_t syntax); static void re_compile_fastmap_iter (regex_t *bufp, const re_dfastate_t *init_state, char *fastmap); -static reg_errcode_t init_dfa (re_dfa_t *dfa, int pat_len); -static void init_word_char (re_dfa_t *dfa); +static reg_errcode_t init_dfa (re_dfa_t *dfa, size_t pat_len); #ifdef RE_ENABLE_I18N static void free_charset (re_charset_t *cset); #endif /* RE_ENABLE_I18N */ @@ -33,38 +32,31 @@ static reg_errcode_t create_initial_state (re_dfa_t *dfa); #ifdef RE_ENABLE_I18N static void optimize_utf8 (re_dfa_t *dfa); #endif -struct subexp_optimize -{ - re_dfa_t *dfa; - re_token_t *nodes; - int no_sub, re_nsub; -}; -static bin_tree_t *optimize_subexps (struct subexp_optimize *so, - bin_tree_t *node, int sidx, int depth); -static reg_errcode_t analyze (re_dfa_t *dfa); -static reg_errcode_t analyze_tree (re_dfa_t *dfa, bin_tree_t *node); -static void calc_first (re_dfa_t *dfa, bin_tree_t *node); -static void calc_next (re_dfa_t *dfa, bin_tree_t *node); -static void calc_epsdest (re_dfa_t *dfa, bin_tree_t *node); -static reg_errcode_t duplicate_node_closure (re_dfa_t *dfa, int top_org_node, - int top_clone_node, int root_node, - unsigned int constraint); -static reg_errcode_t duplicate_node (int *new_idx, re_dfa_t *dfa, int org_idx, - unsigned int constraint); -static int search_duplicated_node (re_dfa_t *dfa, int org_node, +static reg_errcode_t analyze (regex_t *preg); +static reg_errcode_t preorder (bin_tree_t *root, + reg_errcode_t (fn (void *, bin_tree_t *)), + void *extra); +static reg_errcode_t postorder (bin_tree_t *root, + reg_errcode_t (fn (void *, bin_tree_t *)), + void *extra); +static reg_errcode_t optimize_subexps (void *extra, bin_tree_t *node); +static reg_errcode_t lower_subexps (void *extra, bin_tree_t *node); +static bin_tree_t *lower_subexp (reg_errcode_t *err, regex_t *preg, + bin_tree_t *node); +static reg_errcode_t calc_first (void *extra, bin_tree_t *node); +static reg_errcode_t calc_next (void *extra, bin_tree_t *node); +static reg_errcode_t link_nfa_nodes (void *extra, bin_tree_t *node); +static int duplicate_node (re_dfa_t *dfa, int org_idx, unsigned int constraint); +static int search_duplicated_node (const re_dfa_t *dfa, int org_node, unsigned int constraint); static reg_errcode_t calc_eclosure (re_dfa_t *dfa); static reg_errcode_t calc_eclosure_iter (re_node_set *new_set, re_dfa_t *dfa, int node, int root); -static void calc_inveclosure (re_dfa_t *dfa); +static reg_errcode_t calc_inveclosure (re_dfa_t *dfa); static int fetch_number (re_string_t *input, re_token_t *token, reg_syntax_t syntax); -static void fetch_token (re_token_t *result, re_string_t *input, - reg_syntax_t syntax); static int peek_token (re_token_t *token, re_string_t *input, - reg_syntax_t syntax); -static int peek_token_bracket (re_token_t *token, re_string_t *input, - reg_syntax_t syntax); + reg_syntax_t syntax) internal_function; static bin_tree_t *parse (re_string_t *regexp, regex_t *preg, reg_syntax_t syntax, reg_errcode_t *err); static bin_tree_t *parse_reg_exp (re_string_t *regexp, regex_t *preg, @@ -94,58 +86,40 @@ static reg_errcode_t parse_bracket_element (bracket_elem_t *elem, static reg_errcode_t parse_bracket_symbol (bracket_elem_t *elem, re_string_t *regexp, re_token_t *token); -#ifndef _LIBC -# ifdef RE_ENABLE_I18N -static reg_errcode_t build_range_exp (re_bitset_ptr_t sbcset, - re_charset_t *mbcset, int *range_alloc, - bracket_elem_t *start_elem, - bracket_elem_t *end_elem); -static reg_errcode_t build_collating_symbol (re_bitset_ptr_t sbcset, - re_charset_t *mbcset, - int *coll_sym_alloc, - const unsigned char *name); -# else /* not RE_ENABLE_I18N */ -static reg_errcode_t build_range_exp (re_bitset_ptr_t sbcset, - bracket_elem_t *start_elem, - bracket_elem_t *end_elem); -static reg_errcode_t build_collating_symbol (re_bitset_ptr_t sbcset, - const unsigned char *name); -# endif /* not RE_ENABLE_I18N */ -#endif /* not _LIBC */ #ifdef RE_ENABLE_I18N -static reg_errcode_t build_equiv_class (re_bitset_ptr_t sbcset, +static reg_errcode_t build_equiv_class (bitset_t sbcset, re_charset_t *mbcset, int *equiv_class_alloc, const unsigned char *name); -static reg_errcode_t build_charclass (unsigned RE_TRANSLATE_TYPE trans, - re_bitset_ptr_t sbcset, +static reg_errcode_t build_charclass (RE_TRANSLATE_TYPE trans, + bitset_t sbcset, re_charset_t *mbcset, int *char_class_alloc, const unsigned char *class_name, reg_syntax_t syntax); #else /* not RE_ENABLE_I18N */ -static reg_errcode_t build_equiv_class (re_bitset_ptr_t sbcset, +static reg_errcode_t build_equiv_class (bitset_t sbcset, const unsigned char *name); -static reg_errcode_t build_charclass (unsigned RE_TRANSLATE_TYPE trans, - re_bitset_ptr_t sbcset, +static reg_errcode_t build_charclass (RE_TRANSLATE_TYPE trans, + bitset_t sbcset, const unsigned char *class_name, reg_syntax_t syntax); #endif /* not RE_ENABLE_I18N */ static bin_tree_t *build_charclass_op (re_dfa_t *dfa, - unsigned RE_TRANSLATE_TYPE trans, + RE_TRANSLATE_TYPE trans, const unsigned char *class_name, const unsigned char *extra, int non_match, reg_errcode_t *err); static bin_tree_t *create_tree (re_dfa_t *dfa, bin_tree_t *left, bin_tree_t *right, - re_token_type_t type, int index); -static bin_tree_t *re_dfa_add_tree_node (re_dfa_t *dfa, - bin_tree_t *left, bin_tree_t *right, - const re_token_t *token) - __attribute ((noinline)); + re_token_type_t type); +static bin_tree_t *create_token_tree (re_dfa_t *dfa, + bin_tree_t *left, bin_tree_t *right, + const re_token_t *token); static bin_tree_t *duplicate_tree (const bin_tree_t *src, re_dfa_t *dfa); -static void mark_opt_subexp (const bin_tree_t *src, re_dfa_t *dfa); -static void mark_opt_subexp_iter (const bin_tree_t *src, re_dfa_t *dfa, int idx); +static void free_token (re_token_t *node); +static reg_errcode_t free_tree (void *extra, bin_tree_t *node); +static reg_errcode_t mark_opt_subexp (void *extra, bin_tree_t *node); /* This table gives an error message for each of the error codes listed in regex.h. Obviously the order here has to be same as there. @@ -325,10 +299,8 @@ re_set_fastmap (char *fastmap, int icase, int ch) Compile fastmap for the initial_state INIT_STATE. */ static void -re_compile_fastmap_iter (bufp, init_state, fastmap) - regex_t *bufp; - const re_dfastate_t *init_state; - char *fastmap; +re_compile_fastmap_iter (regex_t *bufp, const re_dfastate_t *init_state, + char *fastmap) { re_dfa_t *dfa = (re_dfa_t *) bufp->buffer; int node_cnt; @@ -354,21 +326,26 @@ re_compile_fastmap_iter (bufp, init_state, fastmap) && dfa->nodes[node].type == CHARACTER && dfa->nodes[node].mb_partial) *p++ = dfa->nodes[node].opr.c; - memset (&state, 0, sizeof (state)); + memset (&state, '\0', sizeof (state)); if (mbrtowc (&wc, (const char *) buf, p - buf, &state) == p - buf - && __wcrtomb ((char *) buf, towlower (wc), &state) > 0) + && (__wcrtomb ((char *) buf, towlower (wc), &state) + != (size_t) -1)) re_set_fastmap (fastmap, 0, buf[0]); } #endif } else if (type == SIMPLE_BRACKET) { - int i, j, ch; - for (i = 0, ch = 0; i < BITSET_UINTS; ++i) - for (j = 0; j < UINT_BITS; ++j, ++ch) - if (dfa->nodes[node].opr.sbcset[i] & (1 << j)) - re_set_fastmap (fastmap, icase, ch); + int i, ch; + for (i = 0, ch = 0; i < BITSET_WORDS; ++i) + { + int j; + bitset_word_t w = dfa->nodes[node].opr.sbcset[i]; + for (j = 0; j < BITSET_WORD_BITS; ++j, ++ch) + if (w & ((bitset_word_t) 1 << j)) + re_set_fastmap (fastmap, icase, ch); + } } #ifdef RE_ENABLE_I18N else if (type == COMPLEX_BRACKET) @@ -387,13 +364,11 @@ re_compile_fastmap_iter (bufp, init_state, fastmap) is a valid collation element, and don't catch 'b' since 'b' is the only collation element which starts from 'b'. */ - int j, ch; const int32_t *table = (const int32_t *) _NL_CURRENT (LC_COLLATE, _NL_COLLATE_TABLEMB); - for (i = 0, ch = 0; i < BITSET_UINTS; ++i) - for (j = 0; j < UINT_BITS; ++j, ++ch) - if (table[ch] < 0) - re_set_fastmap (fastmap, icase, ch); + for (i = 0; i < SBC_MAX; ++i) + if (table[i] < 0) + re_set_fastmap (fastmap, icase, i); } # else if (dfa->mb_cur_max > 1) @@ -407,12 +382,13 @@ re_compile_fastmap_iter (bufp, init_state, fastmap) char buf[256]; mbstate_t state; memset (&state, '\0', sizeof (state)); - __wcrtomb (buf, cset->mbchars[i], &state); - re_set_fastmap (fastmap, icase, *(unsigned char *) buf); + if (__wcrtomb (buf, cset->mbchars[i], &state) != (size_t) -1) + re_set_fastmap (fastmap, icase, *(unsigned char *) buf); if ((bufp->syntax & RE_ICASE) && dfa->mb_cur_max > 1) { - __wcrtomb (buf, towlower (cset->mbchars[i]), &state); - re_set_fastmap (fastmap, 0, *(unsigned char *) buf); + if (__wcrtomb (buf, towlower (cset->mbchars[i]), &state) + != (size_t) -1) + re_set_fastmap (fastmap, 0, *(unsigned char *) buf); } } } @@ -532,8 +508,8 @@ weak_alias (__regcomp, regcomp) size_t regerror (errcode, preg, errbuf, errbuf_size) int errcode; - const regex_t *preg; - char *errbuf; + const regex_t *__restrict preg; + char *__restrict errbuf; size_t errbuf_size; { const char *msg; @@ -579,14 +555,10 @@ weak_alias (__regerror, regerror) 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 = +static const bitset_t 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 + [0 ... 0x80 / BITSET_WORD_BITS - 1] = BITSET_WORD_MAX }; #endif @@ -598,16 +570,7 @@ free_dfa_content (re_dfa_t *dfa) if (dfa->nodes) for (i = 0; i < dfa->nodes_len; ++i) - { - re_token_t *node = dfa->nodes + i; -#ifdef RE_ENABLE_I18N - if (node->type == COMPLEX_BRACKET && node->duplicated == 0) - free_charset (node->opr.mbcset); - else -#endif /* RE_ENABLE_I18N */ - if (node->type == SIMPLE_BRACKET && node->duplicated == 0) - re_free (node->opr.sbcset); - } + free_token (dfa->nodes + i); re_free (dfa->nexts); for (i = 0; i < dfa->nodes_len; ++i) { @@ -744,11 +707,8 @@ libc_freeres_fn (free_mem) SYNTAX indicate regular expression's syntax. */ static reg_errcode_t -re_compile_internal (preg, pattern, length, syntax) - regex_t *preg; - const char * pattern; - int length; - reg_syntax_t syntax; +re_compile_internal (regex_t *preg, const char * pattern, size_t length, + reg_syntax_t syntax) { reg_errcode_t err = REG_NOERROR; re_dfa_t *dfa; @@ -788,10 +748,13 @@ re_compile_internal (preg, pattern, length, syntax) return err; } #ifdef DEBUG + /* Note: length+1 will not overflow since it is checked in init_dfa. */ dfa->re_str = re_malloc (char, length + 1); strncpy (dfa->re_str, pattern, length + 1); #endif + __libc_lock_init (dfa->lock); + err = re_string_construct (®exp, pattern, length, preg->translate, syntax & RE_ICASE, dfa); if (BE (err != REG_NOERROR, 0)) @@ -811,29 +774,17 @@ re_compile_internal (preg, pattern, length, syntax) if (BE (dfa->str_tree == NULL, 0)) goto re_compile_internal_free_return; + /* Analyze the tree and create the nfa. */ + err = analyze (preg); + if (BE (err != REG_NOERROR, 0)) + goto re_compile_internal_free_return; + #ifdef RE_ENABLE_I18N /* If possible, do searching in single byte encoding to speed things up. */ if (dfa->is_utf8 && !(syntax & RE_ICASE) && preg->translate == NULL) optimize_utf8 (dfa); #endif - if (preg->re_nsub > 0) - { - struct subexp_optimize so; - - so.dfa = dfa; - so.nodes = dfa->nodes; - so.no_sub = preg->no_sub; - so.re_nsub = preg->re_nsub; - dfa->str_tree = optimize_subexps (&so, dfa->str_tree, -1, 0); - } - - /* Analyze the tree and collect information which is necessary to - create the dfa. */ - err = analyze (dfa); - if (BE (err != REG_NOERROR, 0)) - goto re_compile_internal_free_return; - /* Then create the initial state of the dfa. */ err = create_initial_state (dfa); @@ -855,11 +806,9 @@ re_compile_internal (preg, pattern, length, syntax) as the initial length of some arrays. */ static reg_errcode_t -init_dfa (dfa, pat_len) - re_dfa_t *dfa; - int pat_len; +init_dfa (re_dfa_t *dfa, size_t pat_len) { - int table_size; + unsigned int table_size; #ifndef _LIBC char *codeset_name; #endif @@ -869,13 +818,15 @@ init_dfa (dfa, pat_len) /* Force allocation of str_tree_storage the first time. */ dfa->str_tree_storage_idx = BIN_TREE_STORAGE_SIZE; + /* Avoid overflows. */ + if (pat_len == SIZE_MAX) + return REG_ESPACE; + dfa->nodes_alloc = pat_len + 1; dfa->nodes = re_malloc (re_token_t, dfa->nodes_alloc); - dfa->states_alloc = pat_len + 1; - /* table_size = 2 ^ ceil(log pat_len) */ - for (table_size = 1; table_size > 0; table_size <<= 1) + for (table_size = 1; ; table_size <<= 1) if (table_size > pat_len) break; @@ -894,9 +845,9 @@ init_dfa (dfa, pat_len) codeset_name = nl_langinfo (CODESET); # else codeset_name = getenv ("LC_ALL"); - if (codeset_name == NULL || codeset[0] == '\0') + if (codeset_name == NULL || codeset_name[0] == '\0') codeset_name = getenv ("LC_CTYPE"); - if (codeset_name == NULL || codeset[0] == '\0') + if (codeset_name == NULL || codeset_name[0] == '\0') codeset_name = getenv ("LANG"); if (codeset_name == NULL) codeset_name = ""; @@ -922,22 +873,19 @@ init_dfa (dfa, pat_len) { int i, j, ch; - dfa->sb_char = (re_bitset_ptr_t) calloc (sizeof (bitset), 1); + dfa->sb_char = (re_bitset_ptr_t) calloc (sizeof (bitset_t), 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) + /* Set the bits corresponding to single byte chars. */ + for (i = 0, ch = 0; i < BITSET_WORDS; ++i) + for (j = 0; j < BITSET_WORD_BITS; ++j, ++ch) { - wchar_t wch = __btowc (ch); + wint_t wch = __btowc (ch); if (wch != WEOF) - dfa->sb_char[i] |= 1 << j; + dfa->sb_char[i] |= (bitset_word_t) 1 << j; # ifndef _LIBC - if (isascii (ch) && wch != (wchar_t) ch) + if (isascii (ch) && wch != ch) dfa->map_notascii = 1; # endif } @@ -955,22 +903,21 @@ init_dfa (dfa, pat_len) character used by some operators like "\<", "\>", etc. */ static void -init_word_char (dfa) - re_dfa_t *dfa; +internal_function +init_word_char (re_dfa_t *dfa) { int i, j, ch; dfa->word_ops_used = 1; - for (i = 0, ch = 0; i < BITSET_UINTS; ++i) - for (j = 0; j < UINT_BITS; ++j, ++ch) + for (i = 0, ch = 0; i < BITSET_WORDS; ++i) + for (j = 0; j < BITSET_WORD_BITS; ++j, ++ch) if (isalnum (ch) || ch == '_') - dfa->word_char[i] |= 1 << j; + dfa->word_char[i] |= (bitset_word_t) 1 << j; } /* Free the work area which are only used while compiling. */ static void -free_workarea_compile (preg) - regex_t *preg; +free_workarea_compile (regex_t *preg) { re_dfa_t *dfa = (re_dfa_t *) preg->buffer; bin_tree_storage_t *storage, *next; @@ -989,8 +936,7 @@ free_workarea_compile (preg) /* Create initial states for all contexts. */ static reg_errcode_t -create_initial_state (dfa) - re_dfa_t *dfa; +create_initial_state (re_dfa_t *dfa) { int first, i; reg_errcode_t err; @@ -998,7 +944,7 @@ create_initial_state (dfa) /* Initial states have the epsilon closure of the node which is the first node of the regular expression. */ - first = dfa->str_tree->first; + first = dfa->str_tree->first->node_idx; dfa->init_node = first; err = re_node_set_init_copy (&init_nodes, dfa->eclosures + first); if (BE (err != REG_NOERROR, 0)) @@ -1072,8 +1018,7 @@ create_initial_state (dfa) DFA nodes where needed. */ static void -optimize_utf8 (dfa) - re_dfa_t *dfa; +optimize_utf8 (re_dfa_t *dfa) { int node, i, mb_chars = 0, has_period = 0; @@ -1104,18 +1049,20 @@ optimize_utf8 (dfa) case OP_ALT: case END_OF_RE: case OP_DUP_ASTERISK: - case OP_DUP_QUESTION: case OP_OPEN_SUBEXP: case OP_CLOSE_SUBEXP: break; + case COMPLEX_BRACKET: + return; case SIMPLE_BRACKET: - /* Just double check. */ - for (i = 0x80 / UINT_BITS; i < BITSET_UINTS; ++i) + /* Just double check. The non-ASCII range starts at 0x80. */ + assert (0x80 % BITSET_WORD_BITS == 0); + for (i = 0x80 / BITSET_WORD_BITS; i < BITSET_WORDS; ++i) if (dfa->nodes[node].opr.sbcset[i]) return; break; default: - return; + abort (); } if (mb_chars || has_period) @@ -1135,90 +1082,13 @@ optimize_utf8 (dfa) } #endif -static bin_tree_t * -optimize_subexps (so, node, sidx, depth) - struct subexp_optimize *so; - bin_tree_t *node; - int sidx, depth; -{ - int idx, new_depth, new_sidx; - bin_tree_t *ret; - if (node == NULL) - return NULL; - - new_depth = 0; - new_sidx = sidx; - if ((depth & 1) && node->type == CONCAT - && node->right && node->right->type == 0 - && so->nodes[idx = node->right->node_idx].type == OP_CLOSE_SUBEXP) - { - new_depth = depth + 1; - if (new_depth == 2 - || (so->nodes[idx].opr.idx < 8 * sizeof (so->dfa->used_bkref_map) - && so->dfa->used_bkref_map & (1 << so->nodes[idx].opr.idx))) - new_sidx = so->nodes[idx].opr.idx; - } - node->left = optimize_subexps (so, node->left, new_sidx, new_depth); - new_depth = (depth & 1) == 0 && node->type == CONCAT - && node->left && node->left->type == 0 - && so->nodes[node->left->node_idx].type == OP_OPEN_SUBEXP - ? depth + 1 : 0; - node->right = optimize_subexps (so, node->right, sidx, new_depth); - - if (node->type != CONCAT) - return node; - if ((depth & 1) == 0 - && node->left - && node->left->type == 0 - && so->nodes[idx = node->left->node_idx].type == OP_OPEN_SUBEXP) - ret = node->right; - else if ((depth & 1) - && node->right - && node->right->type == 0 - && so->nodes[idx = node->right->node_idx].type == OP_CLOSE_SUBEXP) - ret = node->left; - else - return node; - - if (so->nodes[idx].opr.idx < 8 * sizeof (so->dfa->used_bkref_map) - && so->dfa->used_bkref_map & (1 << so->nodes[idx].opr.idx)) - return node; - - if (!so->no_sub) - { - int i; - - if (depth < 2) - return node; - - if (so->dfa->subexp_map == NULL) - { - so->dfa->subexp_map = re_malloc (int, so->re_nsub); - if (so->dfa->subexp_map == NULL) - return node; - - for (i = 0; i < so->re_nsub; i++) - so->dfa->subexp_map[i] = i; - } - - i = so->nodes[idx].opr.idx; - assert (sidx < i); - so->dfa->subexp_map[i] = sidx; - } - - so->nodes[idx].type = OP_DELETED_SUBEXP; - ret->parent = node->parent; - return ret; -} - /* Analyze the structure tree, and calculate "first", "next", "edest", "eclosure", and "inveclosure". */ static reg_errcode_t -analyze (dfa) - re_dfa_t *dfa; +analyze (regex_t *preg) { - int i; + re_dfa_t *dfa = (re_dfa_t *) preg->buffer; reg_errcode_t ret; /* Allocate arrays. */ @@ -1226,225 +1096,310 @@ analyze (dfa) dfa->org_indices = re_malloc (int, dfa->nodes_alloc); dfa->edests = re_malloc (re_node_set, dfa->nodes_alloc); dfa->eclosures = re_malloc (re_node_set, dfa->nodes_alloc); - dfa->inveclosures = re_malloc (re_node_set, dfa->nodes_alloc); if (BE (dfa->nexts == NULL || dfa->org_indices == NULL || dfa->edests == NULL - || dfa->eclosures == NULL || dfa->inveclosures == NULL, 0)) + || dfa->eclosures == NULL, 0)) return REG_ESPACE; - /* Initialize them. */ - for (i = 0; i < dfa->nodes_len; ++i) + + dfa->subexp_map = re_malloc (int, preg->re_nsub); + if (dfa->subexp_map != NULL) { - dfa->nexts[i] = -1; - re_node_set_init_empty (dfa->edests + i); - re_node_set_init_empty (dfa->eclosures + i); - re_node_set_init_empty (dfa->inveclosures + i); + int i; + for (i = 0; i < preg->re_nsub; i++) + dfa->subexp_map[i] = i; + preorder (dfa->str_tree, optimize_subexps, dfa); + for (i = 0; i < preg->re_nsub; i++) + if (dfa->subexp_map[i] != i) + break; + if (i == preg->re_nsub) + { + free (dfa->subexp_map); + dfa->subexp_map = NULL; + } } - ret = analyze_tree (dfa, dfa->str_tree); - if (BE (ret == REG_NOERROR, 1)) + ret = postorder (dfa->str_tree, lower_subexps, preg); + if (BE (ret != REG_NOERROR, 0)) + return ret; + ret = postorder (dfa->str_tree, calc_first, dfa); + if (BE (ret != REG_NOERROR, 0)) + return ret; + preorder (dfa->str_tree, calc_next, dfa); + ret = preorder (dfa->str_tree, link_nfa_nodes, dfa); + if (BE (ret != REG_NOERROR, 0)) + return ret; + ret = calc_eclosure (dfa); + if (BE (ret != REG_NOERROR, 0)) + return ret; + + /* We only need this during the prune_impossible_nodes pass in regexec.c; + skip it if p_i_n will not run, as calc_inveclosure can be quadratic. */ + if ((!preg->no_sub && preg->re_nsub > 0 && dfa->has_plural_match) + || dfa->nbackref) { - ret = calc_eclosure (dfa); - if (ret == REG_NOERROR) - calc_inveclosure (dfa); + dfa->inveclosures = re_malloc (re_node_set, dfa->nodes_len); + if (BE (dfa->inveclosures == NULL, 0)) + return REG_ESPACE; + ret = calc_inveclosure (dfa); } + return ret; } -/* Helper functions for analyze. - This function calculate "first", "next", and "edest" for the subtree - whose root is NODE. */ +/* Our parse trees are very unbalanced, so we cannot use a stack to + implement parse tree visits. Instead, we use parent pointers and + some hairy code in these two functions. */ +static reg_errcode_t +postorder (bin_tree_t *root, reg_errcode_t (fn (void *, bin_tree_t *)), + void *extra) +{ + bin_tree_t *node, *prev; + + for (node = root; ; ) + { + /* Descend down the tree, preferably to the left (or to the right + if that's the only child). */ + while (node->left || node->right) + if (node->left) + node = node->left; + else + node = node->right; + + do + { + reg_errcode_t err = fn (extra, node); + if (BE (err != REG_NOERROR, 0)) + return err; + if (node->parent == NULL) + return REG_NOERROR; + prev = node; + node = node->parent; + } + /* Go up while we have a node that is reached from the right. */ + while (node->right == prev || node->right == NULL); + node = node->right; + } +} static reg_errcode_t -analyze_tree (dfa, node) - re_dfa_t *dfa; - bin_tree_t *node; +preorder (bin_tree_t *root, reg_errcode_t (fn (void *, bin_tree_t *)), + void *extra) { - reg_errcode_t ret; - if (node->first == -1) - calc_first (dfa, node); - if (node->next == -1) - calc_next (dfa, node); - calc_epsdest (dfa, node); + bin_tree_t *node; - /* Calculate "first" etc. for the left child. */ - if (node->left != NULL) + for (node = root; ; ) { - ret = analyze_tree (dfa, node->left); - if (BE (ret != REG_NOERROR, 0)) - return ret; + reg_errcode_t err = fn (extra, node); + if (BE (err != REG_NOERROR, 0)) + return err; + + /* Go to the left node, or up and to the right. */ + if (node->left) + node = node->left; + else + { + bin_tree_t *prev = NULL; + while (node->right == prev || node->right == NULL) + { + prev = node; + node = node->parent; + if (!node) + return REG_NOERROR; + } + node = node->right; + } } - /* Calculate "first" etc. for the right child. */ - if (node->right != NULL) +} + +/* Optimization pass: if a SUBEXP is entirely contained, strip it and tell + re_search_internal to map the inner one's opr.idx to this one's. Adjust + backreferences as well. Requires a preorder visit. */ +static reg_errcode_t +optimize_subexps (void *extra, bin_tree_t *node) +{ + re_dfa_t *dfa = (re_dfa_t *) extra; + + if (node->token.type == OP_BACK_REF && dfa->subexp_map) { - ret = analyze_tree (dfa, node->right); - if (BE (ret != REG_NOERROR, 0)) - return ret; + int idx = node->token.opr.idx; + node->token.opr.idx = dfa->subexp_map[idx]; + dfa->used_bkref_map |= 1 << node->token.opr.idx; + } + + else if (node->token.type == SUBEXP + && node->left && node->left->token.type == SUBEXP) + { + int other_idx = node->left->token.opr.idx; + + node->left = node->left->left; + if (node->left) + node->left->parent = node; + + dfa->subexp_map[other_idx] = dfa->subexp_map[node->token.opr.idx]; + if (other_idx < BITSET_WORD_BITS) + dfa->used_bkref_map &= ~((bitset_word_t) 1 << other_idx); } + return REG_NOERROR; } -/* Calculate "first" for the node NODE. */ -static void -calc_first (dfa, node) - re_dfa_t *dfa; - bin_tree_t *node; +/* Lowering pass: Turn each SUBEXP node into the appropriate concatenation + of OP_OPEN_SUBEXP, the body of the SUBEXP (if any) and OP_CLOSE_SUBEXP. */ +static reg_errcode_t +lower_subexps (void *extra, bin_tree_t *node) { - int idx, type; - idx = node->node_idx; - type = (node->type == 0) ? dfa->nodes[idx].type : node->type; + regex_t *preg = (regex_t *) extra; + reg_errcode_t err = REG_NOERROR; - switch (type) + if (node->left && node->left->token.type == SUBEXP) { -#ifdef DEBUG - case OP_OPEN_BRACKET: - case OP_CLOSE_BRACKET: - case OP_OPEN_DUP_NUM: - case OP_CLOSE_DUP_NUM: - case OP_DUP_PLUS: - case OP_NON_MATCH_LIST: - case OP_OPEN_COLL_ELEM: - case OP_CLOSE_COLL_ELEM: - case OP_OPEN_EQUIV_CLASS: - case OP_CLOSE_EQUIV_CLASS: - case OP_OPEN_CHAR_CLASS: - case OP_CLOSE_CHAR_CLASS: - /* These must not appear here. */ - assert (0); -#endif - case END_OF_RE: - case CHARACTER: - case OP_PERIOD: - case OP_DUP_ASTERISK: - case OP_DUP_QUESTION: -#ifdef RE_ENABLE_I18N - case OP_UTF8_PERIOD: - case COMPLEX_BRACKET: -#endif /* RE_ENABLE_I18N */ - case SIMPLE_BRACKET: - case OP_BACK_REF: - case ANCHOR: - case OP_OPEN_SUBEXP: - case OP_CLOSE_SUBEXP: - node->first = idx; - break; - case OP_ALT: - node->first = idx; - break; - /* else fall through */ - default: -#ifdef DEBUG - assert (node->left != NULL); -#endif - if (node->left->first == -1) - calc_first (dfa, node->left); - node->first = node->left->first; - break; + node->left = lower_subexp (&err, preg, node->left); + if (node->left) + node->left->parent = node; + } + if (node->right && node->right->token.type == SUBEXP) + { + node->right = lower_subexp (&err, preg, node->right); + if (node->right) + node->right->parent = node; } -} -/* Calculate "next" for the node NODE. */ + return err; +} -static void -calc_next (dfa, node) - re_dfa_t *dfa; - bin_tree_t *node; +static bin_tree_t * +lower_subexp (reg_errcode_t *err, regex_t *preg, bin_tree_t *node) { - int idx, type; - bin_tree_t *parent = node->parent; - if (parent == NULL) + re_dfa_t *dfa = (re_dfa_t *) preg->buffer; + bin_tree_t *body = node->left; + bin_tree_t *op, *cls, *tree1, *tree; + + if (preg->no_sub + /* We do not optimize empty subexpressions, because otherwise we may + have bad CONCAT nodes with NULL children. This is obviously not + very common, so we do not lose much. An example that triggers + this case is the sed "script" /\(\)/x. */ + && node->left != NULL + && (node->token.opr.idx >= BITSET_WORD_BITS + || !(dfa->used_bkref_map + & ((bitset_word_t) 1 << node->token.opr.idx)))) + return node->left; + + /* Convert the SUBEXP node to the concatenation of an + OP_OPEN_SUBEXP, the contents, and an OP_CLOSE_SUBEXP. */ + op = create_tree (dfa, NULL, NULL, OP_OPEN_SUBEXP); + cls = create_tree (dfa, NULL, NULL, OP_CLOSE_SUBEXP); + tree1 = body ? create_tree (dfa, body, cls, CONCAT) : cls; + tree = create_tree (dfa, op, tree1, CONCAT); + if (BE (tree == NULL || tree1 == NULL || op == NULL || cls == NULL, 0)) { - node->next = -1; - idx = node->node_idx; - if (node->type == 0) - dfa->nexts[idx] = node->next; - return; + *err = REG_ESPACE; + return NULL; } - idx = parent->node_idx; - type = (parent->type == 0) ? dfa->nodes[idx].type : parent->type; + op->token.opr.idx = cls->token.opr.idx = node->token.opr.idx; + op->token.opt_subexp = cls->token.opt_subexp = node->token.opt_subexp; + return tree; +} + +/* Pass 1 in building the NFA: compute FIRST and create unlinked automaton + nodes. Requires a postorder visit. */ +static reg_errcode_t +calc_first (void *extra, bin_tree_t *node) +{ + re_dfa_t *dfa = (re_dfa_t *) extra; + if (node->token.type == CONCAT) + { + node->first = node->left->first; + node->node_idx = node->left->node_idx; + } + else + { + node->first = node; + node->node_idx = re_dfa_add_node (dfa, node->token); + if (BE (node->node_idx == -1, 0)) + return REG_ESPACE; + } + return REG_NOERROR; +} - switch (type) +/* Pass 2: compute NEXT on the tree. Preorder visit. */ +static reg_errcode_t +calc_next (void *extra, bin_tree_t *node) +{ + switch (node->token.type) { case OP_DUP_ASTERISK: - node->next = idx; + node->left->next = node; break; case CONCAT: - if (parent->left == node) - { - if (parent->right->first == -1) - calc_first (dfa, parent->right); - node->next = parent->right->first; - break; - } - /* else fall through */ + node->left->next = node->right->first; + node->right->next = node->next; + break; default: - if (parent->next == -1) - calc_next (dfa, parent); - node->next = parent->next; + if (node->left) + node->left->next = node->next; + if (node->right) + node->right->next = node->next; break; } - idx = node->node_idx; - if (node->type == 0) - dfa->nexts[idx] = node->next; + return REG_NOERROR; } -/* Calculate "edest" for the node NODE. */ - -static void -calc_epsdest (dfa, node) - re_dfa_t *dfa; - bin_tree_t *node; +/* Pass 3: link all DFA nodes to their NEXT node (any order will do). */ +static reg_errcode_t +link_nfa_nodes (void *extra, bin_tree_t *node) { - int idx; - idx = node->node_idx; - if (node->type == 0) + re_dfa_t *dfa = (re_dfa_t *) extra; + int idx = node->node_idx; + reg_errcode_t err = REG_NOERROR; + + switch (node->token.type) { - if (dfa->nodes[idx].type == OP_DUP_ASTERISK - || dfa->nodes[idx].type == OP_DUP_QUESTION) - { - if (node->left->first == -1) - calc_first (dfa, node->left); - if (node->next == -1) - calc_next (dfa, node); - re_node_set_init_2 (dfa->edests + idx, node->left->first, - node->next); - } - else if (dfa->nodes[idx].type == OP_ALT) - { - int left, right; - if (node->left != NULL) - { - if (node->left->first == -1) - calc_first (dfa, node->left); - left = node->left->first; - } - else - { - if (node->next == -1) - calc_next (dfa, node); - left = node->next; - } - if (node->right != NULL) - { - if (node->right->first == -1) - calc_first (dfa, node->right); - right = node->right->first; - } - else - { - if (node->next == -1) - calc_next (dfa, node); - right = node->next; - } - re_node_set_init_2 (dfa->edests + idx, left, right); - } - else if (dfa->nodes[idx].type == ANCHOR - || dfa->nodes[idx].type == OP_OPEN_SUBEXP - || dfa->nodes[idx].type == OP_CLOSE_SUBEXP - || dfa->nodes[idx].type == OP_BACK_REF) - re_node_set_init_1 (dfa->edests + idx, node->next); - else - assert (!IS_EPSILON_NODE (dfa->nodes[idx].type)); + case CONCAT: + break; + + case END_OF_RE: + assert (node->next == NULL); + break; + + case OP_DUP_ASTERISK: + case OP_ALT: + { + int left, right; + dfa->has_plural_match = 1; + if (node->left != NULL) + left = node->left->first->node_idx; + else + left = node->next->node_idx; + if (node->right != NULL) + right = node->right->first->node_idx; + else + right = node->next->node_idx; + assert (left > -1); + assert (right > -1); + err = re_node_set_init_2 (dfa->edests + idx, left, right); + } + break; + + case ANCHOR: + case OP_OPEN_SUBEXP: + case OP_CLOSE_SUBEXP: + err = re_node_set_init_1 (dfa->edests + idx, node->next->node_idx); + break; + + case OP_BACK_REF: + dfa->nexts[idx] = node->next->node_idx; + if (node->token.type == OP_BACK_REF) + re_node_set_init_1 (dfa->edests + idx, dfa->nexts[idx]); + break; + + default: + assert (!IS_EPSILON_NODE (node->token.type)); + dfa->nexts[idx] = node->next->node_idx; + break; } + + return err; } /* Duplicate the epsilon closure of the node ROOT_NODE. @@ -1452,13 +1407,10 @@ calc_epsdest (dfa, node) to their own constraint. */ static reg_errcode_t -duplicate_node_closure (dfa, top_org_node, top_clone_node, root_node, - init_constraint) - re_dfa_t *dfa; - int top_org_node, top_clone_node, root_node; - unsigned int init_constraint; +internal_function +duplicate_node_closure (re_dfa_t *dfa, int top_org_node, int top_clone_node, + int root_node, unsigned int init_constraint) { - reg_errcode_t err; int org_node, clone_node, ret; unsigned int constraint = init_constraint; for (org_node = top_org_node, clone_node = top_clone_node;;) @@ -1472,9 +1424,9 @@ duplicate_node_closure (dfa, top_org_node, top_clone_node, root_node, edests of the back reference. */ org_dest = dfa->nexts[org_node]; re_node_set_empty (dfa->edests + clone_node); - err = duplicate_node (&clone_dest, dfa, org_dest, constraint); - if (BE (err != REG_NOERROR, 0)) - return err; + clone_dest = duplicate_node (dfa, org_dest, constraint); + if (BE (clone_dest == -1, 0)) + return REG_ESPACE; dfa->nexts[clone_node] = dfa->nexts[org_node]; ret = re_node_set_insert (dfa->edests + clone_node, clone_dest); if (BE (ret < 0, 0)) @@ -1510,9 +1462,9 @@ duplicate_node_closure (dfa, top_org_node, top_clone_node, root_node, } constraint |= dfa->nodes[org_node].opr.ctx_type; } - err = duplicate_node (&clone_dest, dfa, org_dest, constraint); - if (BE (err != REG_NOERROR, 0)) - return err; + clone_dest = duplicate_node (dfa, org_dest, constraint); + if (BE (clone_dest == -1, 0)) + return REG_ESPACE; ret = re_node_set_insert (dfa->edests + clone_node, clone_dest); if (BE (ret < 0, 0)) return REG_ESPACE; @@ -1520,7 +1472,7 @@ duplicate_node_closure (dfa, top_org_node, top_clone_node, root_node, else /* dfa->edests[org_node].nelem == 2 */ { /* In case of the node can epsilon-transit, and it has two - destinations. E.g. '|', '*', '+', '?'. */ + destinations. In the bin_tree_t and DFA, that's '|' and '*'. */ org_dest = dfa->edests[org_node].elems[0]; re_node_set_empty (dfa->edests + clone_node); /* Search for a duplicated node which satisfies the constraint. */ @@ -1528,9 +1480,10 @@ duplicate_node_closure (dfa, top_org_node, top_clone_node, root_node, if (clone_dest == -1) { /* There are no such a duplicated node, create a new one. */ - err = duplicate_node (&clone_dest, dfa, org_dest, constraint); - if (BE (err != REG_NOERROR, 0)) - return err; + reg_errcode_t err; + clone_dest = duplicate_node (dfa, org_dest, constraint); + if (BE (clone_dest == -1, 0)) + return REG_ESPACE; ret = re_node_set_insert (dfa->edests + clone_node, clone_dest); if (BE (ret < 0, 0)) return REG_ESPACE; @@ -1549,9 +1502,9 @@ duplicate_node_closure (dfa, top_org_node, top_clone_node, root_node, } org_dest = dfa->edests[org_node].elems[1]; - err = duplicate_node (&clone_dest, dfa, org_dest, constraint); - if (BE (err != REG_NOERROR, 0)) - return err; + clone_dest = duplicate_node (dfa, org_dest, constraint); + if (BE (clone_dest == -1, 0)) + return REG_ESPACE; ret = re_node_set_insert (dfa->edests + clone_node, clone_dest); if (BE (ret < 0, 0)) return REG_ESPACE; @@ -1566,10 +1519,8 @@ duplicate_node_closure (dfa, top_org_node, top_clone_node, root_node, satisfies the constraint CONSTRAINT. */ static int -search_duplicated_node (dfa, org_node, constraint) - re_dfa_t *dfa; - int org_node; - unsigned int constraint; +search_duplicated_node (const re_dfa_t *dfa, int org_node, + unsigned int constraint) { int idx; for (idx = dfa->nodes_len - 1; dfa->nodes[idx].duplicated && idx > 0; --idx) @@ -1582,54 +1533,51 @@ search_duplicated_node (dfa, org_node, constraint) } /* Duplicate the node whose index is ORG_IDX and set the constraint CONSTRAINT. - The new index will be stored in NEW_IDX and return REG_NOERROR if succeeded, - otherwise return the error code. */ + Return the index of the new node, or -1 if insufficient storage is + available. */ -static reg_errcode_t -duplicate_node (new_idx, dfa, org_idx, constraint) - re_dfa_t *dfa; - int *new_idx, org_idx; - unsigned int constraint; +static int +duplicate_node (re_dfa_t *dfa, int org_idx, unsigned int constraint) { - int dup_idx = re_dfa_add_node (dfa, dfa->nodes[org_idx], 1); - if (BE (dup_idx == -1, 0)) - return REG_ESPACE; - dfa->nodes[dup_idx].constraint = constraint; - if (dfa->nodes[org_idx].type == ANCHOR) - dfa->nodes[dup_idx].constraint |= dfa->nodes[org_idx].opr.ctx_type; - dfa->nodes[dup_idx].duplicated = 1; - re_node_set_init_empty (dfa->edests + dup_idx); - re_node_set_init_empty (dfa->eclosures + dup_idx); - re_node_set_init_empty (dfa->inveclosures + dup_idx); - - /* Store the index of the original node. */ - dfa->org_indices[dup_idx] = org_idx; - *new_idx = dup_idx; - return REG_NOERROR; + int dup_idx = re_dfa_add_node (dfa, dfa->nodes[org_idx]); + if (BE (dup_idx != -1, 1)) + { + dfa->nodes[dup_idx].constraint = constraint; + if (dfa->nodes[org_idx].type == ANCHOR) + dfa->nodes[dup_idx].constraint |= dfa->nodes[org_idx].opr.ctx_type; + dfa->nodes[dup_idx].duplicated = 1; + + /* Store the index of the original node. */ + dfa->org_indices[dup_idx] = org_idx; + } + return dup_idx; } -static void -calc_inveclosure (dfa) - re_dfa_t *dfa; +static reg_errcode_t +calc_inveclosure (re_dfa_t *dfa) { - int src, idx, dest; + int src, idx, ret; + for (idx = 0; idx < dfa->nodes_len; ++idx) + re_node_set_init_empty (dfa->inveclosures + idx); + for (src = 0; src < dfa->nodes_len; ++src) { - if (dfa->nodes[src].type == OP_DELETED_SUBEXP) - continue; + int *elems = dfa->eclosures[src].elems; for (idx = 0; idx < dfa->eclosures[src].nelem; ++idx) { - dest = dfa->eclosures[src].elems[idx]; - re_node_set_insert_last (dfa->inveclosures + dest, src); + ret = re_node_set_insert_last (dfa->inveclosures + elems[idx], src); + if (BE (ret == -1, 0)) + return REG_ESPACE; } } + + return REG_NOERROR; } /* Calculate "eclosure" for all the node in DFA. */ static reg_errcode_t -calc_eclosure (dfa) - re_dfa_t *dfa; +calc_eclosure (re_dfa_t *dfa) { int node_idx, incomplete; #ifdef DEBUG @@ -1652,8 +1600,6 @@ calc_eclosure (dfa) #ifdef DEBUG assert (dfa->eclosures[node_idx].nelem != -1); #endif - if (dfa->nodes[node_idx].type == OP_DELETED_SUBEXP) - continue; /* If we have already calculated, skip it. */ if (dfa->eclosures[node_idx].nelem != 0) @@ -1675,10 +1621,7 @@ calc_eclosure (dfa) /* Calculate epsilon closure of NODE. */ static reg_errcode_t -calc_eclosure_iter (new_set, dfa, node, root) - re_node_set *new_set; - re_dfa_t *dfa; - int node, root; +calc_eclosure_iter (re_node_set *new_set, re_dfa_t *dfa, int node, int root) { reg_errcode_t err; unsigned int constraint; @@ -1701,8 +1644,6 @@ calc_eclosure_iter (new_set, dfa, node, root) && dfa->edests[node].nelem && !dfa->nodes[dfa->edests[node].elems[0]].duplicated) { - int org_node, cur_node; - org_node = cur_node = node; err = duplicate_node_closure (dfa, node, node, node, constraint); if (BE (err != REG_NOERROR, 0)) return err; @@ -1758,10 +1699,8 @@ calc_eclosure_iter (new_set, dfa, node, root) We must not use this function inside bracket expressions. */ static void -fetch_token (result, input, syntax) - re_token_t *result; - re_string_t *input; - reg_syntax_t syntax; +internal_function +fetch_token (re_token_t *result, re_string_t *input, reg_syntax_t syntax) { re_string_skip_bytes (input, peek_token (result, input, syntax)); } @@ -1770,10 +1709,8 @@ fetch_token (result, input, syntax) We must not use this function inside bracket expressions. */ static int -peek_token (token, input, syntax) - re_token_t *token; - re_string_t *input; - reg_syntax_t syntax; +internal_function +peek_token (re_token_t *token, re_string_t *input, reg_syntax_t syntax) { unsigned char c; @@ -1859,7 +1796,7 @@ peek_token (token, input, syntax) if (!(syntax & RE_NO_GNU_OPS)) { token->type = ANCHOR; - token->opr.ctx_type = INSIDE_WORD; + token->opr.ctx_type = NOT_WORD_DELIM; } break; case 'w': @@ -2011,10 +1948,8 @@ peek_token (token, input, syntax) We must not use this function out of bracket expressions. */ static int -peek_token_bracket (token, input, syntax) - re_token_t *token; - re_string_t *input; - reg_syntax_t syntax; +internal_function +peek_token_bracket (re_token_t *token, re_string_t *input, reg_syntax_t syntax) { unsigned char c; if (re_string_eoi (input)) @@ -2110,11 +2045,8 @@ peek_token_bracket (token, input, syntax) EOR means end of regular expression. */ static bin_tree_t * -parse (regexp, preg, syntax, err) - re_string_t *regexp; - regex_t *preg; - reg_syntax_t syntax; - reg_errcode_t *err; +parse (re_string_t *regexp, regex_t *preg, reg_syntax_t syntax, + reg_errcode_t *err) { re_dfa_t *dfa = (re_dfa_t *) preg->buffer; bin_tree_t *tree, *eor, *root; @@ -2124,9 +2056,9 @@ parse (regexp, preg, syntax, err) tree = parse_reg_exp (regexp, preg, ¤t_token, syntax, 0, err); if (BE (*err != REG_NOERROR && tree == NULL, 0)) return NULL; - eor = re_dfa_add_tree_node (dfa, NULL, NULL, ¤t_token); + eor = create_tree (dfa, NULL, NULL, END_OF_RE); if (tree != NULL) - root = create_tree (dfa, tree, eor, CONCAT, 0); + root = create_tree (dfa, tree, eor, CONCAT); else root = eor; if (BE (eor == NULL || root == NULL, 0)) @@ -2147,13 +2079,8 @@ parse (regexp, preg, syntax, err) ALT means alternative, which represents the operator `|'. */ static bin_tree_t * -parse_reg_exp (regexp, preg, token, syntax, nest, err) - re_string_t *regexp; - regex_t *preg; - re_token_t *token; - reg_syntax_t syntax; - int nest; - reg_errcode_t *err; +parse_reg_exp (re_string_t *regexp, regex_t *preg, re_token_t *token, + reg_syntax_t syntax, int nest, reg_errcode_t *err) { re_dfa_t *dfa = (re_dfa_t *) preg->buffer; bin_tree_t *tree, *branch = NULL; @@ -2163,7 +2090,6 @@ parse_reg_exp (regexp, preg, token, syntax, nest, err) while (token->type == OP_ALT) { - re_token_t alt_token = *token; fetch_token (token, regexp, syntax | RE_CARET_ANCHORS_HERE); if (token->type != OP_ALT && token->type != END_OF_RE && (nest == 0 || token->type != OP_CLOSE_SUBEXP)) @@ -2174,13 +2100,12 @@ parse_reg_exp (regexp, preg, token, syntax, nest, err) } else branch = NULL; - tree = re_dfa_add_tree_node (dfa, tree, branch, &alt_token); + tree = create_tree (dfa, tree, branch, OP_ALT); if (BE (tree == NULL, 0)) { *err = REG_ESPACE; return NULL; } - dfa->has_plural_match = 1; } return tree; } @@ -2195,13 +2120,8 @@ parse_reg_exp (regexp, preg, token, syntax, nest, err) CAT means concatenation. */ static bin_tree_t * -parse_branch (regexp, preg, token, syntax, nest, err) - re_string_t *regexp; - regex_t *preg; - re_token_t *token; - reg_syntax_t syntax; - int nest; - reg_errcode_t *err; +parse_branch (re_string_t *regexp, regex_t *preg, re_token_t *token, + reg_syntax_t syntax, int nest, reg_errcode_t *err) { bin_tree_t *tree, *exp; re_dfa_t *dfa = (re_dfa_t *) preg->buffer; @@ -2219,7 +2139,7 @@ parse_branch (regexp, preg, token, syntax, nest, err) } if (tree != NULL && exp != NULL) { - tree = create_tree (dfa, tree, exp, CONCAT, 0); + tree = create_tree (dfa, tree, exp, CONCAT); if (tree == NULL) { *err = REG_ESPACE; @@ -2240,20 +2160,15 @@ parse_branch (regexp, preg, token, syntax, nest, err) */ static bin_tree_t * -parse_expression (regexp, preg, token, syntax, nest, err) - re_string_t *regexp; - regex_t *preg; - re_token_t *token; - reg_syntax_t syntax; - int nest; - reg_errcode_t *err; +parse_expression (re_string_t *regexp, regex_t *preg, re_token_t *token, + reg_syntax_t syntax, int nest, reg_errcode_t *err) { re_dfa_t *dfa = (re_dfa_t *) preg->buffer; bin_tree_t *tree; switch (token->type) { case CHARACTER: - tree = re_dfa_add_tree_node (dfa, NULL, NULL, token); + tree = create_token_tree (dfa, NULL, NULL, token); if (BE (tree == NULL, 0)) { *err = REG_ESPACE; @@ -2267,8 +2182,8 @@ parse_expression (regexp, preg, token, syntax, nest, err) { bin_tree_t *mbc_remain; fetch_token (token, regexp, syntax); - mbc_remain = re_dfa_add_tree_node (dfa, NULL, NULL, token); - tree = create_tree (dfa, tree, mbc_remain, CONCAT, 0); + mbc_remain = create_token_tree (dfa, NULL, NULL, token); + tree = create_tree (dfa, tree, mbc_remain, CONCAT); if (BE (mbc_remain == NULL || tree == NULL, 0)) { *err = REG_ESPACE; @@ -2295,7 +2210,7 @@ parse_expression (regexp, preg, token, syntax, nest, err) return NULL; } dfa->used_bkref_map |= 1 << token->opr.idx; - tree = re_dfa_add_tree_node (dfa, NULL, NULL, token); + tree = create_token_tree (dfa, NULL, NULL, token); if (BE (tree == NULL, 0)) { *err = REG_ESPACE; @@ -2340,7 +2255,7 @@ parse_expression (regexp, preg, token, syntax, nest, err) token->type = CHARACTER; /* mb_partial and word_char bits should be initialized already by peek_token. */ - tree = re_dfa_add_tree_node (dfa, NULL, NULL, token); + tree = create_token_tree (dfa, NULL, NULL, token); if (BE (tree == NULL, 0)) { *err = REG_ESPACE; @@ -2349,18 +2264,27 @@ parse_expression (regexp, preg, token, syntax, nest, err) break; case ANCHOR: if ((token->opr.ctx_type - & (WORD_DELIM | INSIDE_WORD | WORD_FIRST | WORD_LAST)) + & (WORD_DELIM | NOT_WORD_DELIM | WORD_FIRST | WORD_LAST)) && dfa->word_ops_used == 0) init_word_char (dfa); - if (token->opr.ctx_type == WORD_DELIM) + if (token->opr.ctx_type == WORD_DELIM + || token->opr.ctx_type == NOT_WORD_DELIM) { bin_tree_t *tree_first, *tree_last; - token->opr.ctx_type = WORD_FIRST; - tree_first = re_dfa_add_tree_node (dfa, NULL, NULL, token); - token->opr.ctx_type = WORD_LAST; - tree_last = re_dfa_add_tree_node (dfa, NULL, NULL, token); - token->type = OP_ALT; - tree = re_dfa_add_tree_node (dfa, tree_first, tree_last, token); + if (token->opr.ctx_type == WORD_DELIM) + { + token->opr.ctx_type = WORD_FIRST; + tree_first = create_token_tree (dfa, NULL, NULL, token); + token->opr.ctx_type = WORD_LAST; + } + else + { + token->opr.ctx_type = INSIDE_WORD; + tree_first = create_token_tree (dfa, NULL, NULL, token); + token->opr.ctx_type = INSIDE_NOTWORD; + } + tree_last = create_token_tree (dfa, NULL, NULL, token); + tree = create_tree (dfa, tree_first, tree_last, OP_ALT); if (BE (tree_first == NULL || tree_last == NULL || tree == NULL, 0)) { *err = REG_ESPACE; @@ -2369,7 +2293,7 @@ parse_expression (regexp, preg, token, syntax, nest, err) } else { - tree = re_dfa_add_tree_node (dfa, NULL, NULL, token); + tree = create_token_tree (dfa, NULL, NULL, token); if (BE (tree == NULL, 0)) { *err = REG_ESPACE; @@ -2383,7 +2307,7 @@ parse_expression (regexp, preg, token, syntax, nest, err) fetch_token (token, regexp, syntax); return tree; case OP_PERIOD: - tree = re_dfa_add_tree_node (dfa, NULL, NULL, token); + tree = create_token_tree (dfa, NULL, NULL, token); if (BE (tree == NULL, 0)) { *err = REG_ESPACE; @@ -2439,7 +2363,6 @@ parse_expression (regexp, preg, token, syntax, nest, err) *err = REG_BADRPT; return NULL; } - dfa->has_plural_match = 1; } return tree; @@ -2453,26 +2376,14 @@ parse_expression (regexp, preg, token, syntax, nest, err) */ static bin_tree_t * -parse_sub_exp (regexp, preg, token, syntax, nest, err) - re_string_t *regexp; - regex_t *preg; - re_token_t *token; - reg_syntax_t syntax; - int nest; - reg_errcode_t *err; +parse_sub_exp (re_string_t *regexp, regex_t *preg, re_token_t *token, + reg_syntax_t syntax, int nest, reg_errcode_t *err) { re_dfa_t *dfa = (re_dfa_t *) preg->buffer; - bin_tree_t *tree, *left_par, *right_par; + bin_tree_t *tree; size_t cur_nsub; cur_nsub = preg->re_nsub++; - left_par = re_dfa_add_tree_node (dfa, NULL, NULL, token); - if (BE (left_par == NULL, 0)) - { - *err = REG_ESPACE; - return NULL; - } - dfa->nodes[left_par->node_idx].opr.idx = cur_nsub; fetch_token (token, regexp, syntax | RE_CARET_ANCHORS_HERE); /* The subexpression may be a null string. */ @@ -2481,41 +2392,31 @@ parse_sub_exp (regexp, preg, token, syntax, nest, err) else { tree = parse_reg_exp (regexp, preg, token, syntax, nest, err); - if (BE (*err != REG_NOERROR && tree == NULL, 0)) + if (BE (*err == REG_NOERROR && token->type != OP_CLOSE_SUBEXP, 0)) + *err = REG_EPAREN; + if (BE (*err != REG_NOERROR, 0)) return NULL; } - if (BE (token->type != OP_CLOSE_SUBEXP, 0)) - { - *err = REG_EPAREN; - return NULL; - } - right_par = re_dfa_add_tree_node (dfa, NULL, NULL, token); - dfa->completed_bkref_map |= 1 << cur_nsub; - tree = ((tree == NULL) ? right_par - : create_tree (dfa, tree, right_par, CONCAT, 0)); - tree = create_tree (dfa, left_par, tree, CONCAT, 0); - if (BE (right_par == NULL || tree == NULL, 0)) + + if (cur_nsub <= '9' - '1') + dfa->completed_bkref_map |= 1 << cur_nsub; + + tree = create_tree (dfa, tree, NULL, SUBEXP); + if (BE (tree == NULL, 0)) { *err = REG_ESPACE; return NULL; } - dfa->nodes[right_par->node_idx].opr.idx = cur_nsub; - + tree->token.opr.idx = cur_nsub; return tree; } /* This function parse repetition operators like "*", "+", "{1,3}" etc. */ static bin_tree_t * -parse_dup_op (elem, regexp, dfa, token, syntax, err) - bin_tree_t *elem; - re_string_t *regexp; - re_dfa_t *dfa; - re_token_t *token; - reg_syntax_t syntax; - reg_errcode_t *err; +parse_dup_op (bin_tree_t *elem, re_string_t *regexp, re_dfa_t *dfa, + re_token_t *token, reg_syntax_t syntax, reg_errcode_t *err) { - re_token_t dup_token; bin_tree_t *tree = NULL, *old_tree = NULL; int i, start, end, start_idx = re_string_cur_idx (regexp); re_token_t start_token = *token; @@ -2578,9 +2479,13 @@ parse_dup_op (elem, regexp, dfa, token, syntax, err) fetch_token (token, regexp, syntax); - /* Treat "<re>{0}*" etc. as "<re>{0}". */ - if (BE (elem == NULL || (start == 0 && end == 0), 0)) + if (BE (elem == NULL, 0)) return NULL; + if (BE (start == 0 && end == 0, 0)) + { + postorder (elem, free_tree, NULL); + return NULL; + } /* Extract "<re>{n,m}" to "<re><re>...<re><re>{0,<m-n>}". */ if (BE (start > 0, 0)) @@ -2589,7 +2494,7 @@ parse_dup_op (elem, regexp, dfa, token, syntax, err) for (i = 2; i <= start; ++i) { elem = duplicate_tree (elem, dfa); - tree = create_tree (dfa, tree, elem, CONCAT, 0); + tree = create_tree (dfa, tree, elem, CONCAT); if (BE (elem == NULL || tree == NULL, 0)) goto parse_dup_op_espace; } @@ -2604,9 +2509,10 @@ parse_dup_op (elem, regexp, dfa, token, syntax, err) else old_tree = NULL; - mark_opt_subexp (elem, dfa); - dup_token.type = (end == -1 ? OP_DUP_ASTERISK : OP_DUP_QUESTION); - tree = re_dfa_add_tree_node (dfa, elem, NULL, &dup_token); + if (elem->token.type == SUBEXP) + postorder (elem, mark_opt_subexp, (void *) (long) elem->token.opr.idx); + + tree = create_tree (dfa, elem, NULL, (end == -1 ? OP_DUP_ASTERISK : OP_ALT)); if (BE (tree == NULL, 0)) goto parse_dup_op_espace; @@ -2616,17 +2522,17 @@ parse_dup_op (elem, regexp, dfa, token, syntax, err) for (i = start + 2; i <= end; ++i) { elem = duplicate_tree (elem, dfa); - tree = create_tree (dfa, tree, elem, CONCAT, 0); + tree = create_tree (dfa, tree, elem, CONCAT); if (BE (elem == NULL || tree == NULL, 0)) goto parse_dup_op_espace; - tree = re_dfa_add_tree_node (dfa, tree, NULL, &dup_token); + tree = create_tree (dfa, tree, NULL, OP_ALT); if (BE (tree == NULL, 0)) goto parse_dup_op_espace; } if (old_tree) - tree = create_tree (dfa, old_tree, tree, CONCAT, 0); + tree = create_tree (dfa, old_tree, tree, CONCAT); return tree; @@ -2648,15 +2554,14 @@ parse_dup_op (elem, regexp, dfa, token, syntax, err) update it. */ static reg_errcode_t +internal_function # ifdef RE_ENABLE_I18N -build_range_exp (sbcset, mbcset, range_alloc, start_elem, end_elem) - re_charset_t *mbcset; - int *range_alloc; +build_range_exp (bitset_t sbcset, re_charset_t *mbcset, int *range_alloc, + bracket_elem_t *start_elem, bracket_elem_t *end_elem) # else /* not RE_ENABLE_I18N */ -build_range_exp (sbcset, start_elem, end_elem) +build_range_exp (bitset_t sbcset, bracket_elem_t *start_elem, + bracket_elem_t *end_elem) # endif /* not RE_ENABLE_I18N */ - re_bitset_ptr_t sbcset; - bracket_elem_t *start_elem, *end_elem; { unsigned int start_ch, end_ch; /* Equivalence Classes and Character Classes can't be a range start/end. */ @@ -2675,7 +2580,9 @@ build_range_exp (sbcset, start_elem, end_elem) # ifdef RE_ENABLE_I18N { - wchar_t wc, start_wc, end_wc; + wchar_t wc; + wint_t start_wc; + wint_t end_wc; wchar_t cmp_buf[6] = {L'\0', L'\0', L'\0', L'\0', L'\0', L'\0'}; start_ch = ((start_elem->type == SB_CHAR) ? start_elem->opr.ch @@ -2768,15 +2675,13 @@ build_range_exp (sbcset, start_elem, end_elem) pointer argument since we may update it. */ static reg_errcode_t +internal_function # ifdef RE_ENABLE_I18N -build_collating_symbol (sbcset, mbcset, coll_sym_alloc, name) - re_charset_t *mbcset; - int *coll_sym_alloc; +build_collating_symbol (bitset_t sbcset, re_charset_t *mbcset, + int *coll_sym_alloc, const unsigned char *name) # else /* not RE_ENABLE_I18N */ -build_collating_symbol (sbcset, name) +build_collating_symbol (bitset_t sbcset, const unsigned char *name) # endif /* not RE_ENABLE_I18N */ - re_bitset_ptr_t sbcset; - const unsigned char *name; { size_t name_len = strlen ((const char *) name); if (BE (name_len != 1, 0)) @@ -2793,12 +2698,8 @@ build_collating_symbol (sbcset, name) "[[.a-a.]]" etc. */ static bin_tree_t * -parse_bracket_exp (regexp, dfa, token, syntax, err) - re_string_t *regexp; - re_dfa_t *dfa; - re_token_t *token; - reg_syntax_t syntax; - reg_errcode_t *err; +parse_bracket_exp (re_string_t *regexp, re_dfa_t *dfa, re_token_t *token, + reg_syntax_t syntax, reg_errcode_t *err) { #ifdef _LIBC const unsigned char *collseqmb; @@ -2820,23 +2721,28 @@ parse_bracket_exp (regexp, dfa, token, syntax, err) { int32_t hash = elem_hash ((const char *) name, name_len); int32_t elem = hash % table_size; - int32_t second = hash % (table_size - 2); - while (symb_table[2 * elem] != 0) - { - /* First compare the hashing value. */ - if (symb_table[2 * elem] == hash - /* Compare the length of the name. */ - && name_len == extra[symb_table[2 * elem + 1]] - /* Compare the name. */ - && memcmp (name, &extra[symb_table[2 * elem + 1] + 1], - name_len) == 0) + if (symb_table[2 * elem] != 0) + { + int32_t second = hash % (table_size - 2) + 1; + + do { - /* Yep, this is the entry. */ - break; - } + /* First compare the hashing value. */ + if (symb_table[2 * elem] == hash + /* Compare the length of the name. */ + && name_len == extra[symb_table[2 * elem + 1]] + /* Compare the name. */ + && memcmp (name, &extra[symb_table[2 * elem + 1] + 1], + name_len) == 0) + { + /* Yep, this is the entry. */ + break; + } - /* Next entry. */ - elem += second; + /* Next entry. */ + elem += second; + } + while (symb_table[2 * elem] != 0); } return elem; } @@ -2918,7 +2824,7 @@ parse_bracket_exp (regexp, dfa, token, syntax, err) build_range_exp (sbcset, mbcset, range_alloc, start_elem, end_elem) re_charset_t *mbcset; int *range_alloc; - re_bitset_ptr_t sbcset; + bitset_t sbcset; bracket_elem_t *start_elem, *end_elem; { unsigned int ch; @@ -3001,7 +2907,7 @@ parse_bracket_exp (regexp, dfa, token, syntax, err) build_collating_symbol (sbcset, mbcset, coll_sym_alloc, name) re_charset_t *mbcset; int *coll_sym_alloc; - re_bitset_ptr_t sbcset; + bitset_t sbcset; const unsigned char *name; { int32_t elem, idx; @@ -3078,7 +2984,7 @@ parse_bracket_exp (regexp, dfa, token, syntax, err) /* if (MB_CUR_MAX > 1) */ - collseqwc = _NL_CURRENT (LC_COLLATE, _NL_COLLATE_COLLSEQWC); + collseqwc = _NL_CURRENT (LC_COLLATE, _NL_COLLATE_COLLSEQWC); table_size = _NL_CURRENT_WORD (LC_COLLATE, _NL_COLLATE_SYMB_HASH_SIZEMB); symb_table = (const int32_t *) _NL_CURRENT (LC_COLLATE, _NL_COLLATE_SYMB_TABLEMB); @@ -3086,7 +2992,7 @@ parse_bracket_exp (regexp, dfa, token, syntax, err) _NL_COLLATE_SYMB_EXTRAMB); } #endif - sbcset = (re_bitset_ptr_t) calloc (sizeof (unsigned int), BITSET_UINTS); + sbcset = (re_bitset_ptr_t) calloc (sizeof (bitset_t), 1); #ifdef RE_ENABLE_I18N mbcset = (re_charset_t *) calloc (sizeof (re_charset_t), 1); #endif /* RE_ENABLE_I18N */ @@ -3113,7 +3019,7 @@ parse_bracket_exp (regexp, dfa, token, syntax, err) #endif /* not RE_ENABLE_I18N */ non_match = 1; if (syntax & RE_HAT_LISTS_NOT_NEWLINE) - bitset_set (sbcset, '\0'); + bitset_set (sbcset, '\n'); re_string_skip_bytes (regexp, token_len); /* Skip a token. */ token_len = peek_token_bracket (token, regexp, syntax); if (BE (token->type == END_OF_RE, 0)) @@ -3282,57 +3188,59 @@ parse_bracket_exp (regexp, dfa, token, syntax, err) /* Ensure only single byte characters are set. */ if (dfa->mb_cur_max > 1) bitset_mask (sbcset, dfa->sb_char); -#endif /* RE_ENABLE_I18N */ - - /* Build a tree for simple bracket. */ - br_token.type = SIMPLE_BRACKET; - br_token.opr.sbcset = sbcset; - work_tree = re_dfa_add_tree_node (dfa, NULL, NULL, &br_token); - if (BE (work_tree == NULL, 0)) - goto parse_bracket_exp_espace; -#ifdef RE_ENABLE_I18N if (mbcset->nmbchars || mbcset->ncoll_syms || mbcset->nequiv_classes || mbcset->nranges || (dfa->mb_cur_max > 1 && (mbcset->nchar_classes || mbcset->non_match))) { - re_token_t alt_token; bin_tree_t *mbc_tree; int sbc_idx; /* Build a tree for complex bracket. */ dfa->has_mb_node = 1; - for (sbc_idx = 0; sbc_idx < BITSET_UINTS; ++sbc_idx) + br_token.type = COMPLEX_BRACKET; + br_token.opr.mbcset = mbcset; + mbc_tree = create_token_tree (dfa, NULL, NULL, &br_token); + if (BE (mbc_tree == NULL, 0)) + goto parse_bracket_exp_espace; + for (sbc_idx = 0; sbc_idx < BITSET_WORDS; ++sbc_idx) if (sbcset[sbc_idx]) break; /* If there are no bits set in sbcset, there is no point of having both SIMPLE_BRACKET and COMPLEX_BRACKET. */ - if (sbc_idx == BITSET_UINTS) + if (sbc_idx < BITSET_WORDS) + { + /* Build a tree for simple bracket. */ + br_token.type = SIMPLE_BRACKET; + br_token.opr.sbcset = sbcset; + work_tree = create_token_tree (dfa, NULL, NULL, &br_token); + if (BE (work_tree == NULL, 0)) + goto parse_bracket_exp_espace; + + /* Then join them by ALT node. */ + work_tree = create_tree (dfa, work_tree, mbc_tree, OP_ALT); + if (BE (work_tree == NULL, 0)) + goto parse_bracket_exp_espace; + } + else { re_free (sbcset); - dfa->nodes[work_tree->node_idx].type = COMPLEX_BRACKET; - dfa->nodes[work_tree->node_idx].opr.mbcset = mbcset; - return work_tree; + work_tree = mbc_tree; } - br_token.type = COMPLEX_BRACKET; - br_token.opr.mbcset = mbcset; - mbc_tree = re_dfa_add_tree_node (dfa, NULL, NULL, &br_token); - if (BE (mbc_tree == NULL, 0)) - goto parse_bracket_exp_espace; - /* Then join them by ALT node. */ - alt_token.type = OP_ALT; - dfa->has_plural_match = 1; - work_tree = re_dfa_add_tree_node (dfa, work_tree, mbc_tree, &alt_token); - if (BE (mbc_tree != NULL, 1)) - return work_tree; } else +#endif /* not RE_ENABLE_I18N */ { +#ifdef RE_ENABLE_I18N free_charset (mbcset); - return work_tree; +#endif + /* Build a tree for simple bracket. */ + br_token.type = SIMPLE_BRACKET; + br_token.opr.sbcset = sbcset; + work_tree = create_token_tree (dfa, NULL, NULL, &br_token); + if (BE (work_tree == NULL, 0)) + goto parse_bracket_exp_espace; } -#else /* not RE_ENABLE_I18N */ return work_tree; -#endif /* not RE_ENABLE_I18N */ parse_bracket_exp_espace: *err = REG_ESPACE; @@ -3347,15 +3255,9 @@ parse_bracket_exp (regexp, dfa, token, syntax, err) /* Parse an element in the bracket expression. */ static reg_errcode_t -parse_bracket_element (elem, regexp, token, token_len, dfa, syntax, - accept_hyphen) - bracket_elem_t *elem; - re_string_t *regexp; - re_token_t *token; - int token_len; - re_dfa_t *dfa; - reg_syntax_t syntax; - int accept_hyphen; +parse_bracket_element (bracket_elem_t *elem, re_string_t *regexp, + re_token_t *token, int token_len, re_dfa_t *dfa, + reg_syntax_t syntax, int accept_hyphen) { #ifdef RE_ENABLE_I18N int cur_char_size; @@ -3393,10 +3295,8 @@ parse_bracket_element (elem, regexp, token, token_len, dfa, syntax, [=<equivalent_class>=]. */ static reg_errcode_t -parse_bracket_symbol (elem, regexp, token) - bracket_elem_t *elem; - re_string_t *regexp; - re_token_t *token; +parse_bracket_symbol (bracket_elem_t *elem, re_string_t *regexp, + re_token_t *token) { unsigned char ch, delim = token->opr.c; int i = 0; @@ -3443,16 +3343,13 @@ parse_bracket_symbol (elem, regexp, token) static reg_errcode_t #ifdef RE_ENABLE_I18N -build_equiv_class (sbcset, mbcset, equiv_class_alloc, name) - re_charset_t *mbcset; - int *equiv_class_alloc; +build_equiv_class (bitset_t sbcset, re_charset_t *mbcset, + int *equiv_class_alloc, const unsigned char *name) #else /* not RE_ENABLE_I18N */ -build_equiv_class (sbcset, name) +build_equiv_class (bitset_t sbcset, const unsigned char *name) #endif /* not RE_ENABLE_I18N */ - re_bitset_ptr_t sbcset; - const unsigned char *name; { -#if defined _LIBC +#ifdef _LIBC uint32_t nrules = _NL_CURRENT_WORD (LC_COLLATE, _NL_COLLATE_NRULES); if (nrules != 0) { @@ -3538,16 +3435,13 @@ build_equiv_class (sbcset, name) static reg_errcode_t #ifdef RE_ENABLE_I18N -build_charclass (trans, sbcset, mbcset, char_class_alloc, class_name, syntax) - re_charset_t *mbcset; - int *char_class_alloc; +build_charclass (RE_TRANSLATE_TYPE trans, bitset_t sbcset, + re_charset_t *mbcset, int *char_class_alloc, + const unsigned char *class_name, reg_syntax_t syntax) #else /* not RE_ENABLE_I18N */ -build_charclass (trans, sbcset, class_name, syntax) +build_charclass (RE_TRANSLATE_TYPE trans, bitset_t sbcset, + const unsigned char *class_name, reg_syntax_t syntax) #endif /* not RE_ENABLE_I18N */ - unsigned RE_TRANSLATE_TYPE trans; - re_bitset_ptr_t sbcset; - const unsigned char *class_name; - reg_syntax_t syntax; { int i; const char *name = (const char *) class_name; @@ -3577,39 +3471,45 @@ build_charclass (trans, sbcset, class_name, syntax) #endif /* RE_ENABLE_I18N */ #define BUILD_CHARCLASS_LOOP(ctype_func) \ - for (i = 0; i < SBC_MAX; ++i) \ + do { \ + if (BE (trans != NULL, 0)) \ { \ - if (ctype_func (i)) \ - { \ - int ch = trans ? trans[i] : i; \ - bitset_set (sbcset, ch); \ - } \ - } + for (i = 0; i < SBC_MAX; ++i) \ + if (ctype_func (i)) \ + bitset_set (sbcset, trans[i]); \ + } \ + else \ + { \ + for (i = 0; i < SBC_MAX; ++i) \ + if (ctype_func (i)) \ + bitset_set (sbcset, i); \ + } \ + } while (0) if (strcmp (name, "alnum") == 0) - BUILD_CHARCLASS_LOOP (isalnum) + BUILD_CHARCLASS_LOOP (isalnum); else if (strcmp (name, "cntrl") == 0) - BUILD_CHARCLASS_LOOP (iscntrl) + BUILD_CHARCLASS_LOOP (iscntrl); else if (strcmp (name, "lower") == 0) - BUILD_CHARCLASS_LOOP (islower) + BUILD_CHARCLASS_LOOP (islower); else if (strcmp (name, "space") == 0) - BUILD_CHARCLASS_LOOP (isspace) + BUILD_CHARCLASS_LOOP (isspace); else if (strcmp (name, "alpha") == 0) - BUILD_CHARCLASS_LOOP (isalpha) + BUILD_CHARCLASS_LOOP (isalpha); else if (strcmp (name, "digit") == 0) - BUILD_CHARCLASS_LOOP (isdigit) + BUILD_CHARCLASS_LOOP (isdigit); else if (strcmp (name, "print") == 0) - BUILD_CHARCLASS_LOOP (isprint) + BUILD_CHARCLASS_LOOP (isprint); else if (strcmp (name, "upper") == 0) - BUILD_CHARCLASS_LOOP (isupper) + BUILD_CHARCLASS_LOOP (isupper); else if (strcmp (name, "blank") == 0) - BUILD_CHARCLASS_LOOP (isblank) + BUILD_CHARCLASS_LOOP (isblank); else if (strcmp (name, "graph") == 0) - BUILD_CHARCLASS_LOOP (isgraph) + BUILD_CHARCLASS_LOOP (isgraph); else if (strcmp (name, "punct") == 0) - BUILD_CHARCLASS_LOOP (ispunct) + BUILD_CHARCLASS_LOOP (ispunct); else if (strcmp (name, "xdigit") == 0) - BUILD_CHARCLASS_LOOP (isxdigit) + BUILD_CHARCLASS_LOOP (isxdigit); else return REG_ECTYPE; @@ -3617,13 +3517,10 @@ build_charclass (trans, sbcset, class_name, syntax) } static bin_tree_t * -build_charclass_op (dfa, trans, class_name, extra, non_match, err) - re_dfa_t *dfa; - unsigned RE_TRANSLATE_TYPE trans; - const unsigned char *class_name; - const unsigned char *extra; - int non_match; - reg_errcode_t *err; +build_charclass_op (re_dfa_t *dfa, RE_TRANSLATE_TYPE trans, + const unsigned char *class_name, + const unsigned char *extra, int non_match, + reg_errcode_t *err) { re_bitset_ptr_t sbcset; #ifdef RE_ENABLE_I18N @@ -3634,7 +3531,7 @@ build_charclass_op (dfa, trans, class_name, extra, non_match, err) re_token_t br_token; bin_tree_t *tree; - sbcset = (re_bitset_ptr_t) calloc (sizeof (unsigned int), BITSET_UINTS); + sbcset = (re_bitset_ptr_t) calloc (sizeof (bitset_t), 1); #ifdef RE_ENABLE_I18N mbcset = (re_charset_t *) calloc (sizeof (re_charset_t), 1); #endif /* RE_ENABLE_I18N */ @@ -3652,10 +3549,6 @@ build_charclass_op (dfa, trans, class_name, extra, non_match, err) if (non_match) { #ifdef RE_ENABLE_I18N - /* - if (syntax & RE_HAT_LISTS_NOT_NEWLINE) - bitset_set(cset->sbcset, '\0'); - */ mbcset->non_match = 1; #endif /* not RE_ENABLE_I18N */ } @@ -3693,26 +3586,23 @@ build_charclass_op (dfa, trans, class_name, extra, non_match, err) /* Build a tree for simple bracket. */ br_token.type = SIMPLE_BRACKET; br_token.opr.sbcset = sbcset; - tree = re_dfa_add_tree_node (dfa, NULL, NULL, &br_token); + tree = create_token_tree (dfa, NULL, NULL, &br_token); if (BE (tree == NULL, 0)) goto build_word_op_espace; #ifdef RE_ENABLE_I18N if (dfa->mb_cur_max > 1) { - re_token_t alt_token; bin_tree_t *mbc_tree; /* Build a tree for complex bracket. */ br_token.type = COMPLEX_BRACKET; br_token.opr.mbcset = mbcset; dfa->has_mb_node = 1; - mbc_tree = re_dfa_add_tree_node (dfa, NULL, NULL, &br_token); + mbc_tree = create_token_tree (dfa, NULL, NULL, &br_token); if (BE (mbc_tree == NULL, 0)) goto build_word_op_espace; /* Then join them by ALT node. */ - alt_token.type = OP_ALT; - dfa->has_plural_match = 1; - tree = re_dfa_add_tree_node (dfa, tree, mbc_tree, &alt_token); + tree = create_tree (dfa, tree, mbc_tree, OP_ALT); if (BE (mbc_tree != NULL, 1)) return tree; } @@ -3740,10 +3630,7 @@ build_charclass_op (dfa, trans, class_name, extra, non_match, err) Return -2, If an error is occured. */ static int -fetch_number (input, token, syntax) - re_string_t *input; - re_token_t *token; - reg_syntax_t syntax; +fetch_number (re_string_t *input, re_token_t *token, reg_syntax_t syntax) { int num = -1; unsigned char c; @@ -3783,12 +3670,17 @@ free_charset (re_charset_t *cset) /* Create a tree node. */ static bin_tree_t * -create_tree (dfa, left, right, type, index) - re_dfa_t *dfa; - bin_tree_t *left; - bin_tree_t *right; - re_token_type_t type; - int index; +create_tree (re_dfa_t *dfa, bin_tree_t *left, bin_tree_t *right, + re_token_type_t type) +{ + re_token_t t; + t.type = type; + return create_token_tree (dfa, left, right, &t); +} + +static bin_tree_t * +create_token_tree (re_dfa_t *dfa, bin_tree_t *left, bin_tree_t *right, + const re_token_t *token) { bin_tree_t *tree; if (BE (dfa->str_tree_storage_idx == BIN_TREE_STORAGE_SIZE, 0)) @@ -3806,11 +3698,12 @@ create_tree (dfa, left, right, type, index) tree->parent = NULL; tree->left = left; tree->right = right; - tree->type = type; - tree->node_idx = index; - tree->first = -1; - tree->next = -1; - re_node_set_init_empty (&tree->eclosure); + tree->token = *token; + tree->token.duplicated = 0; + tree->token.opt_subexp = 0; + tree->first = NULL; + tree->next = NULL; + tree->node_idx = -1; if (left != NULL) left->parent = tree; @@ -3819,103 +3712,85 @@ create_tree (dfa, left, right, type, index) return tree; } -/* Create both a DFA node and a tree for it. */ +/* Mark the tree SRC as an optional subexpression. + To be called from preorder or postorder. */ -static bin_tree_t * -re_dfa_add_tree_node (dfa, left, right, token) - re_dfa_t *dfa; - bin_tree_t *left; - bin_tree_t *right; - const re_token_t *token; +static reg_errcode_t +mark_opt_subexp (void *extra, bin_tree_t *node) { - int new_idx = re_dfa_add_node (dfa, *token, 0); + int idx = (int) (long) extra; + if (node->token.type == SUBEXP && node->token.opr.idx == idx) + node->token.opt_subexp = 1; - if (new_idx == -1) - return NULL; - - return create_tree (dfa, left, right, 0, new_idx); + return REG_NOERROR; } -/* Mark the tree SRC as an optional subexpression. */ +/* Free the allocated memory inside NODE. */ static void -mark_opt_subexp (src, dfa) - const bin_tree_t *src; - re_dfa_t *dfa; +free_token (re_token_t *node) { - /* Pass an OPT_SUBEXP_IDX which is != 1 if the duplicated tree is - a subexpression. */ - if (src->type == CONCAT - && src->left->type == NON_TYPE - && dfa->nodes[src->left->node_idx].type == OP_OPEN_SUBEXP) - mark_opt_subexp_iter (src, dfa, dfa->nodes[src->left->node_idx].opr.idx); +#ifdef RE_ENABLE_I18N + if (node->type == COMPLEX_BRACKET && node->duplicated == 0) + free_charset (node->opr.mbcset); + else +#endif /* RE_ENABLE_I18N */ + if (node->type == SIMPLE_BRACKET && node->duplicated == 0) + re_free (node->opr.sbcset); } +/* Worker function for tree walking. Free the allocated memory inside NODE + and its children. */ -/* Recursive tree walker for mark_opt_subexp. */ - -static void -mark_opt_subexp_iter (src, dfa, idx) - const bin_tree_t *src; - re_dfa_t *dfa; - int idx; +static reg_errcode_t +free_tree (void *extra, bin_tree_t *node) { - int node_idx; - - if (src->type == NON_TYPE) - { - node_idx = src->node_idx; - if ((dfa->nodes[node_idx].type == OP_OPEN_SUBEXP - || dfa->nodes[node_idx].type == OP_CLOSE_SUBEXP) - && dfa->nodes[node_idx].opr.idx == idx) - dfa->nodes[node_idx].opt_subexp = 1; - } - - if (src->left != NULL) - mark_opt_subexp_iter (src->left, dfa, idx); - - if (src->right != NULL) - mark_opt_subexp_iter (src->right, dfa, idx); + free_token (&node->token); + return REG_NOERROR; } -/* Duplicate the node SRC, and return new node. */ +/* Duplicate the node SRC, and return new node. This is a preorder + visit similar to the one implemented by the generic visitor, but + we need more infrastructure to maintain two parallel trees --- so, + it's easier to duplicate. */ static bin_tree_t * -duplicate_tree (src, dfa) - const bin_tree_t *src; - re_dfa_t *dfa; +duplicate_tree (const bin_tree_t *root, re_dfa_t *dfa) { - bin_tree_t *left = NULL, *right = NULL, *new_tree; - int new_node_idx; - /* Since node indies must be according to Post-order of the tree, - we must duplicate the left at first. */ - if (src->left != NULL) - { - left = duplicate_tree (src->left, dfa); - if (left == NULL) - return NULL; - } + const bin_tree_t *node; + bin_tree_t *dup_root; + bin_tree_t **p_new = &dup_root, *dup_node = root->parent; - /* Secondaly, duplicate the right. */ - if (src->right != NULL) + for (node = root; ; ) { - right = duplicate_tree (src->right, dfa); - if (right == NULL) + /* Create a new tree and link it back to the current parent. */ + *p_new = create_token_tree (dfa, NULL, NULL, &node->token); + if (*p_new == NULL) return NULL; - } + (*p_new)->parent = dup_node; + (*p_new)->token.duplicated = 1; + dup_node = *p_new; - /* At last, duplicate itself. */ - if (src->type == NON_TYPE) - { - new_node_idx = re_dfa_add_node (dfa, dfa->nodes[src->node_idx], 0); - dfa->nodes[new_node_idx].duplicated = 1; - if (BE (new_node_idx == -1, 0)) - return NULL; + /* Go to the left node, or up and to the right. */ + if (node->left) + { + node = node->left; + p_new = &dup_node->left; + } + else + { + const bin_tree_t *prev = NULL; + while (node->right == prev || node->right == NULL) + { + prev = node; + node = node->parent; + dup_node = dup_node->parent; + if (!node) + return dup_root; + } + node = node->right; + p_new = &dup_node->right; + } } - else - new_node_idx = src->type; - - new_tree = create_tree (dfa, left, right, src->type, new_node_idx); - return new_tree; } |