diff options
| author | yugui <yugui@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2008-08-25 15:02:05 +0000 |
|---|---|---|
| committer | yugui <yugui@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2008-08-25 15:02:05 +0000 |
| commit | 0dc342de848a642ecce8db697b8fecd83a63e117 (patch) | |
| tree | 2b7ed4724aff1f86073e4740134bda9c4aac1a39 /trunk/regcomp.c | |
| parent | ef70cf7138ab8034b5b806f466e4b484b24f0f88 (diff) | |
added tag v1_9_0_4
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/tags/v1_9_0_4@18845 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'trunk/regcomp.c')
| -rw-r--r-- | trunk/regcomp.c | 6311 |
1 files changed, 6311 insertions, 0 deletions
diff --git a/trunk/regcomp.c b/trunk/regcomp.c new file mode 100644 index 0000000000..cb54c44145 --- /dev/null +++ b/trunk/regcomp.c @@ -0,0 +1,6311 @@ +/********************************************************************** + regcomp.c - Oniguruma (regular expression library) +**********************************************************************/ +/*- + * Copyright (c) 2002-2007 K.Kosako <sndgk393 AT ybb DOT ne DOT jp> + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include "regparse.h" + +OnigCaseFoldType OnigDefaultCaseFoldFlag = ONIGENC_CASE_FOLD_MIN; + +extern OnigCaseFoldType +onig_get_default_case_fold_flag(void) +{ + return OnigDefaultCaseFoldFlag; +} + +extern int +onig_set_default_case_fold_flag(OnigCaseFoldType case_fold_flag) +{ + OnigDefaultCaseFoldFlag = case_fold_flag; + return 0; +} + + +#ifndef PLATFORM_UNALIGNED_WORD_ACCESS +static unsigned char PadBuf[WORD_ALIGNMENT_SIZE]; +#endif + +static UChar* +str_dup(UChar* s, UChar* end) +{ + int len = end - s; + + if (len > 0) { + UChar* r = (UChar* )xmalloc(len + 1); + CHECK_NULL_RETURN(r); + xmemcpy(r, s, len); + r[len] = (UChar )0; + return r; + } + else return NULL; +} + +static void +swap_node(Node* a, Node* b) +{ + Node c; + c = *a; *a = *b; *b = c; + + if (NTYPE(a) == NT_STR) { + StrNode* sn = NSTR(a); + if (sn->capa == 0) { + int len = sn->end - sn->s; + sn->s = sn->buf; + sn->end = sn->s + len; + } + } + + if (NTYPE(b) == NT_STR) { + StrNode* sn = NSTR(b); + if (sn->capa == 0) { + int len = sn->end - sn->s; + sn->s = sn->buf; + sn->end = sn->s + len; + } + } +} + +static OnigDistance +distance_add(OnigDistance d1, OnigDistance d2) +{ + if (d1 == ONIG_INFINITE_DISTANCE || d2 == ONIG_INFINITE_DISTANCE) + return ONIG_INFINITE_DISTANCE; + else { + if (d1 <= ONIG_INFINITE_DISTANCE - d2) return d1 + d2; + else return ONIG_INFINITE_DISTANCE; + } +} + +static OnigDistance +distance_multiply(OnigDistance d, int m) +{ + if (m == 0) return 0; + + if (d < ONIG_INFINITE_DISTANCE / m) + return d * m; + else + return ONIG_INFINITE_DISTANCE; +} + +static int +bitset_is_empty(BitSetRef bs) +{ + int i; + for (i = 0; i < (int )BITSET_SIZE; i++) { + if (bs[i] != 0) return 0; + } + return 1; +} + +#ifdef ONIG_DEBUG +static int +bitset_on_num(BitSetRef bs) +{ + int i, n; + + n = 0; + for (i = 0; i < SINGLE_BYTE_SIZE; i++) { + if (BITSET_AT(bs, i)) n++; + } + return n; +} +#endif + +extern int +onig_bbuf_init(BBuf* buf, int size) +{ + if (size <= 0) { + size = 0; + buf->p = NULL; + } + else { + buf->p = (UChar* )xmalloc(size); + if (IS_NULL(buf->p)) return(ONIGERR_MEMORY); + } + + buf->alloc = size; + buf->used = 0; + return 0; +} + + +#ifdef USE_SUBEXP_CALL + +static int +unset_addr_list_init(UnsetAddrList* uslist, int size) +{ + UnsetAddr* p; + + p = (UnsetAddr* )xmalloc(sizeof(UnsetAddr)* size); + CHECK_NULL_RETURN_MEMERR(p); + uslist->num = 0; + uslist->alloc = size; + uslist->us = p; + return 0; +} + +static void +unset_addr_list_end(UnsetAddrList* uslist) +{ + if (IS_NOT_NULL(uslist->us)) + xfree(uslist->us); +} + +static int +unset_addr_list_add(UnsetAddrList* uslist, int offset, struct _Node* node) +{ + UnsetAddr* p; + int size; + + if (uslist->num >= uslist->alloc) { + size = uslist->alloc * 2; + p = (UnsetAddr* )xrealloc(uslist->us, sizeof(UnsetAddr) * size); + CHECK_NULL_RETURN_MEMERR(p); + uslist->alloc = size; + uslist->us = p; + } + + uslist->us[uslist->num].offset = offset; + uslist->us[uslist->num].target = node; + uslist->num++; + return 0; +} +#endif /* USE_SUBEXP_CALL */ + + +static int +add_opcode(regex_t* reg, int opcode) +{ + BBUF_ADD1(reg, opcode); + return 0; +} + +#ifdef USE_COMBINATION_EXPLOSION_CHECK +static int +add_state_check_num(regex_t* reg, int num) +{ + StateCheckNumType n = (StateCheckNumType )num; + + BBUF_ADD(reg, &n, SIZE_STATE_CHECK_NUM); + return 0; +} +#endif + +static int +add_rel_addr(regex_t* reg, int addr) +{ + RelAddrType ra = (RelAddrType )addr; + + BBUF_ADD(reg, &ra, SIZE_RELADDR); + return 0; +} + +static int +add_abs_addr(regex_t* reg, int addr) +{ + AbsAddrType ra = (AbsAddrType )addr; + + BBUF_ADD(reg, &ra, SIZE_ABSADDR); + return 0; +} + +static int +add_length(regex_t* reg, int len) +{ + LengthType l = (LengthType )len; + + BBUF_ADD(reg, &l, SIZE_LENGTH); + return 0; +} + +static int +add_mem_num(regex_t* reg, int num) +{ + MemNumType n = (MemNumType )num; + + BBUF_ADD(reg, &n, SIZE_MEMNUM); + return 0; +} + +static int +add_pointer(regex_t* reg, void* addr) +{ + PointerType ptr = (PointerType )addr; + + BBUF_ADD(reg, &ptr, SIZE_POINTER); + return 0; +} + +static int +add_option(regex_t* reg, OnigOptionType option) +{ + BBUF_ADD(reg, &option, SIZE_OPTION); + return 0; +} + +static int +add_opcode_rel_addr(regex_t* reg, int opcode, int addr) +{ + int r; + + r = add_opcode(reg, opcode); + if (r) return r; + r = add_rel_addr(reg, addr); + return r; +} + +static int +add_bytes(regex_t* reg, UChar* bytes, int len) +{ + BBUF_ADD(reg, bytes, len); + return 0; +} + +static int +add_bitset(regex_t* reg, BitSetRef bs) +{ + BBUF_ADD(reg, bs, SIZE_BITSET); + return 0; +} + +static int +add_opcode_option(regex_t* reg, int opcode, OnigOptionType option) +{ + int r; + + r = add_opcode(reg, opcode); + if (r) return r; + r = add_option(reg, option); + return r; +} + +static int compile_length_tree(Node* node, regex_t* reg); +static int compile_tree(Node* node, regex_t* reg); + + +#define IS_NEED_STR_LEN_OP_EXACT(op) \ + ((op) == OP_EXACTN || (op) == OP_EXACTMB2N ||\ + (op) == OP_EXACTMB3N || (op) == OP_EXACTMBN || (op) == OP_EXACTN_IC) + +static int +select_str_opcode(int mb_len, int str_len, int ignore_case) +{ + int op; + + if (ignore_case) { + switch (str_len) { + case 1: op = OP_EXACT1_IC; break; + default: op = OP_EXACTN_IC; break; + } + } + else { + switch (mb_len) { + case 1: + switch (str_len) { + case 1: op = OP_EXACT1; break; + case 2: op = OP_EXACT2; break; + case 3: op = OP_EXACT3; break; + case 4: op = OP_EXACT4; break; + case 5: op = OP_EXACT5; break; + default: op = OP_EXACTN; break; + } + break; + + case 2: + switch (str_len) { + case 1: op = OP_EXACTMB2N1; break; + case 2: op = OP_EXACTMB2N2; break; + case 3: op = OP_EXACTMB2N3; break; + default: op = OP_EXACTMB2N; break; + } + break; + + case 3: + op = OP_EXACTMB3N; + break; + + default: + op = OP_EXACTMBN; + break; + } + } + return op; +} + +static int +compile_tree_empty_check(Node* node, regex_t* reg, int empty_info) +{ + int r; + int saved_num_null_check = reg->num_null_check; + + if (empty_info != 0) { + r = add_opcode(reg, OP_NULL_CHECK_START); + if (r) return r; + r = add_mem_num(reg, reg->num_null_check); /* NULL CHECK ID */ + if (r) return r; + reg->num_null_check++; + } + + r = compile_tree(node, reg); + if (r) return r; + + if (empty_info != 0) { + if (empty_info == NQ_TARGET_IS_EMPTY) + r = add_opcode(reg, OP_NULL_CHECK_END); + else if (empty_info == NQ_TARGET_IS_EMPTY_MEM) + r = add_opcode(reg, OP_NULL_CHECK_END_MEMST); + else if (empty_info == NQ_TARGET_IS_EMPTY_REC) + r = add_opcode(reg, OP_NULL_CHECK_END_MEMST_PUSH); + + if (r) return r; + r = add_mem_num(reg, saved_num_null_check); /* NULL CHECK ID */ + } + return r; +} + +#ifdef USE_SUBEXP_CALL +static int +compile_call(CallNode* node, regex_t* reg) +{ + int r; + + r = add_opcode(reg, OP_CALL); + if (r) return r; + r = unset_addr_list_add(node->unset_addr_list, BBUF_GET_OFFSET_POS(reg), + node->target); + if (r) return r; + r = add_abs_addr(reg, 0 /*dummy addr.*/); + return r; +} +#endif + +static int +compile_tree_n_times(Node* node, int n, regex_t* reg) +{ + int i, r; + + for (i = 0; i < n; i++) { + r = compile_tree(node, reg); + if (r) return r; + } + return 0; +} + +static int +add_compile_string_length(UChar* s ARG_UNUSED, int mb_len, int str_len, + regex_t* reg ARG_UNUSED, int ignore_case) +{ + int len; + int op = select_str_opcode(mb_len, str_len, ignore_case); + + len = SIZE_OPCODE; + + if (op == OP_EXACTMBN) len += SIZE_LENGTH; + if (IS_NEED_STR_LEN_OP_EXACT(op)) + len += SIZE_LENGTH; + + len += mb_len * str_len; + return len; +} + +static int +add_compile_string(UChar* s, int mb_len, int str_len, + regex_t* reg, int ignore_case) +{ + int op = select_str_opcode(mb_len, str_len, ignore_case); + add_opcode(reg, op); + + if (op == OP_EXACTMBN) + add_length(reg, mb_len); + + if (IS_NEED_STR_LEN_OP_EXACT(op)) { + if (op == OP_EXACTN_IC) + add_length(reg, mb_len * str_len); + else + add_length(reg, str_len); + } + + add_bytes(reg, s, mb_len * str_len); + return 0; +} + + +static int +compile_length_string_node(Node* node, regex_t* reg) +{ + int rlen, r, len, prev_len, slen, ambig; + OnigEncoding enc = reg->enc; + UChar *p, *prev; + StrNode* sn; + + sn = NSTR(node); + if (sn->end <= sn->s) + return 0; + + ambig = NSTRING_IS_AMBIG(node); + + p = prev = sn->s; + prev_len = enclen(enc, p, sn->end); + p += prev_len; + slen = 1; + rlen = 0; + + for (; p < sn->end; ) { + len = enclen(enc, p, sn->end); + if (len == prev_len) { + slen++; + } + else { + r = add_compile_string_length(prev, prev_len, slen, reg, ambig); + rlen += r; + prev = p; + slen = 1; + prev_len = len; + } + p += len; + } + r = add_compile_string_length(prev, prev_len, slen, reg, ambig); + rlen += r; + return rlen; +} + +static int +compile_length_string_raw_node(StrNode* sn, regex_t* reg) +{ + if (sn->end <= sn->s) + return 0; + + return add_compile_string_length(sn->s, 1 /* sb */, sn->end - sn->s, reg, 0); +} + +static int +compile_string_node(Node* node, regex_t* reg) +{ + int r, len, prev_len, slen, ambig; + OnigEncoding enc = reg->enc; + UChar *p, *prev, *end; + StrNode* sn; + + sn = NSTR(node); + if (sn->end <= sn->s) + return 0; + + end = sn->end; + ambig = NSTRING_IS_AMBIG(node); + + p = prev = sn->s; + prev_len = enclen(enc, p, end); + p += prev_len; + slen = 1; + + for (; p < end; ) { + len = enclen(enc, p, end); + if (len == prev_len) { + slen++; + } + else { + r = add_compile_string(prev, prev_len, slen, reg, ambig); + if (r) return r; + + prev = p; + slen = 1; + prev_len = len; + } + + p += len; + } + return add_compile_string(prev, prev_len, slen, reg, ambig); +} + +static int +compile_string_raw_node(StrNode* sn, regex_t* reg) +{ + if (sn->end <= sn->s) + return 0; + + return add_compile_string(sn->s, 1 /* sb */, sn->end - sn->s, reg, 0); +} + +static int +add_multi_byte_cclass(BBuf* mbuf, regex_t* reg) +{ +#ifdef PLATFORM_UNALIGNED_WORD_ACCESS + add_length(reg, mbuf->used); + return add_bytes(reg, mbuf->p, mbuf->used); +#else + int r, pad_size; + UChar* p = BBUF_GET_ADD_ADDRESS(reg) + SIZE_LENGTH; + + GET_ALIGNMENT_PAD_SIZE(p, pad_size); + add_length(reg, mbuf->used + (WORD_ALIGNMENT_SIZE - 1)); + if (pad_size != 0) add_bytes(reg, PadBuf, pad_size); + + r = add_bytes(reg, mbuf->p, mbuf->used); + + /* padding for return value from compile_length_cclass_node() to be fix. */ + pad_size = (WORD_ALIGNMENT_SIZE - 1) - pad_size; + if (pad_size != 0) add_bytes(reg, PadBuf, pad_size); + return r; +#endif +} + +static int +compile_length_cclass_node(CClassNode* cc, regex_t* reg) +{ + int len; + + if (IS_NCCLASS_SHARE(cc)) { + len = SIZE_OPCODE + SIZE_POINTER; + return len; + } + + if (IS_NULL(cc->mbuf)) { + len = SIZE_OPCODE + SIZE_BITSET; + } + else { + if (ONIGENC_MBC_MINLEN(reg->enc) > 1 || bitset_is_empty(cc->bs)) { + len = SIZE_OPCODE; + } + else { + len = SIZE_OPCODE + SIZE_BITSET; + } +#ifdef PLATFORM_UNALIGNED_WORD_ACCESS + len += SIZE_LENGTH + cc->mbuf->used; +#else + len += SIZE_LENGTH + cc->mbuf->used + (WORD_ALIGNMENT_SIZE - 1); +#endif + } + + return len; +} + +static int +compile_cclass_node(CClassNode* cc, regex_t* reg) +{ + int r; + + if (IS_NCCLASS_SHARE(cc)) { + add_opcode(reg, OP_CCLASS_NODE); + r = add_pointer(reg, cc); + return r; + } + + if (IS_NULL(cc->mbuf)) { + if (IS_NCCLASS_NOT(cc)) + add_opcode(reg, OP_CCLASS_NOT); + else + add_opcode(reg, OP_CCLASS); + + r = add_bitset(reg, cc->bs); + } + else { + if (ONIGENC_MBC_MINLEN(reg->enc) > 1 || bitset_is_empty(cc->bs)) { + if (IS_NCCLASS_NOT(cc)) + add_opcode(reg, OP_CCLASS_MB_NOT); + else + add_opcode(reg, OP_CCLASS_MB); + + r = add_multi_byte_cclass(cc->mbuf, reg); + } + else { + if (IS_NCCLASS_NOT(cc)) + add_opcode(reg, OP_CCLASS_MIX_NOT); + else + add_opcode(reg, OP_CCLASS_MIX); + + r = add_bitset(reg, cc->bs); + if (r) return r; + r = add_multi_byte_cclass(cc->mbuf, reg); + } + } + + return r; +} + +static int +entry_repeat_range(regex_t* reg, int id, int lower, int upper) +{ +#define REPEAT_RANGE_ALLOC 4 + + OnigRepeatRange* p; + + if (reg->repeat_range_alloc == 0) { + p = (OnigRepeatRange* )xmalloc(sizeof(OnigRepeatRange) * REPEAT_RANGE_ALLOC); + CHECK_NULL_RETURN_MEMERR(p); + reg->repeat_range = p; + reg->repeat_range_alloc = REPEAT_RANGE_ALLOC; + } + else if (reg->repeat_range_alloc <= id) { + int n; + n = reg->repeat_range_alloc + REPEAT_RANGE_ALLOC; + p = (OnigRepeatRange* )xrealloc(reg->repeat_range, + sizeof(OnigRepeatRange) * n); + CHECK_NULL_RETURN_MEMERR(p); + reg->repeat_range = p; + reg->repeat_range_alloc = n; + } + else { + p = reg->repeat_range; + } + + p[id].lower = lower; + p[id].upper = (IS_REPEAT_INFINITE(upper) ? 0x7fffffff : upper); + return 0; +} + +static int +compile_range_repeat_node(QtfrNode* qn, int target_len, int empty_info, + regex_t* reg) +{ + int r; + int num_repeat = reg->num_repeat; + + r = add_opcode(reg, qn->greedy ? OP_REPEAT : OP_REPEAT_NG); + if (r) return r; + r = add_mem_num(reg, num_repeat); /* OP_REPEAT ID */ + reg->num_repeat++; + if (r) return r; + r = add_rel_addr(reg, target_len + SIZE_OP_REPEAT_INC); + if (r) return r; + + r = entry_repeat_range(reg, num_repeat, qn->lower, qn->upper); + if (r) return r; + + r = compile_tree_empty_check(qn->target, reg, empty_info); + if (r) return r; + + if ( +#ifdef USE_SUBEXP_CALL + reg->num_call > 0 || +#endif + IS_QUANTIFIER_IN_REPEAT(qn)) { + r = add_opcode(reg, qn->greedy ? OP_REPEAT_INC_SG : OP_REPEAT_INC_NG_SG); + } + else { + r = add_opcode(reg, qn->greedy ? OP_REPEAT_INC : OP_REPEAT_INC_NG); + } + if (r) return r; + r = add_mem_num(reg, num_repeat); /* OP_REPEAT ID */ + return r; +} + +static int +is_anychar_star_quantifier(QtfrNode* qn) +{ + if (qn->greedy && IS_REPEAT_INFINITE(qn->upper) && + NTYPE(qn->target) == NT_CANY) + return 1; + else + return 0; +} + +#define QUANTIFIER_EXPAND_LIMIT_SIZE 50 +#define CKN_ON (ckn > 0) + +#ifdef USE_COMBINATION_EXPLOSION_CHECK + +static int +compile_length_quantifier_node(QtfrNode* qn, regex_t* reg) +{ + int len, mod_tlen, cklen; + int ckn; + int infinite = IS_REPEAT_INFINITE(qn->upper); + int empty_info = qn->target_empty_info; + int tlen = compile_length_tree(qn->target, reg); + + if (tlen < 0) return tlen; + + ckn = ((reg->num_comb_exp_check > 0) ? qn->comb_exp_check_num : 0); + + cklen = (CKN_ON ? SIZE_STATE_CHECK_NUM: 0); + + /* anychar repeat */ + if (NTYPE(qn->target) == NT_CANY) { + if (qn->greedy && infinite) { + if (IS_NOT_NULL(qn->next_head_exact) && !CKN_ON) + return SIZE_OP_ANYCHAR_STAR_PEEK_NEXT + tlen * qn->lower + cklen; + else + return SIZE_OP_ANYCHAR_STAR + tlen * qn->lower + cklen; + } + } + + if (empty_info != 0) + mod_tlen = tlen + (SIZE_OP_NULL_CHECK_START + SIZE_OP_NULL_CHECK_END); + else + mod_tlen = tlen; + + if (infinite && qn->lower <= 1) { + if (qn->greedy) { + if (qn->lower == 1) + len = SIZE_OP_JUMP; + else + len = 0; + + len += SIZE_OP_PUSH + cklen + mod_tlen + SIZE_OP_JUMP; + } + else { + if (qn->lower == 0) + len = SIZE_OP_JUMP; + else + len = 0; + + len += mod_tlen + SIZE_OP_PUSH + cklen; + } + } + else if (qn->upper == 0) { + if (qn->is_refered != 0) /* /(?<n>..){0}/ */ + len = SIZE_OP_JUMP + tlen; + else + len = 0; + } + else if (qn->upper == 1 && qn->greedy) { + if (qn->lower == 0) { + if (CKN_ON) { + len = SIZE_OP_STATE_CHECK_PUSH + tlen; + } + else { + len = SIZE_OP_PUSH + tlen; + } + } + else { + len = tlen; + } + } + else if (!qn->greedy && qn->upper == 1 && qn->lower == 0) { /* '??' */ + len = SIZE_OP_PUSH + cklen + SIZE_OP_JUMP + tlen; + } + else { + len = SIZE_OP_REPEAT_INC + + mod_tlen + SIZE_OPCODE + SIZE_RELADDR + SIZE_MEMNUM; + if (CKN_ON) + len += SIZE_OP_STATE_CHECK; + } + + return len; +} + +static int +compile_quantifier_node(QtfrNode* qn, regex_t* reg) +{ + int r, mod_tlen; + int ckn; + int infinite = IS_REPEAT_INFINITE(qn->upper); + int empty_info = qn->target_empty_info; + int tlen = compile_length_tree(qn->target, reg); + + if (tlen < 0) return tlen; + + ckn = ((reg->num_comb_exp_check > 0) ? qn->comb_exp_check_num : 0); + + if (is_anychar_star_quantifier(qn)) { + r = compile_tree_n_times(qn->target, qn->lower, reg); + if (r) return r; + if (IS_NOT_NULL(qn->next_head_exact) && !CKN_ON) { + if (IS_MULTILINE(reg->options)) + r = add_opcode(reg, OP_ANYCHAR_ML_STAR_PEEK_NEXT); + else + r = add_opcode(reg, OP_ANYCHAR_STAR_PEEK_NEXT); + if (r) return r; + if (CKN_ON) { + r = add_state_check_num(reg, ckn); + if (r) return r; + } + + return add_bytes(reg, NSTR(qn->next_head_exact)->s, 1); + } + else { + if (IS_MULTILINE(reg->options)) { + r = add_opcode(reg, (CKN_ON ? + OP_STATE_CHECK_ANYCHAR_ML_STAR + : OP_ANYCHAR_ML_STAR)); + } + else { + r = add_opcode(reg, (CKN_ON ? + OP_STATE_CHECK_ANYCHAR_STAR + : OP_ANYCHAR_STAR)); + } + if (r) return r; + if (CKN_ON) + r = add_state_check_num(reg, ckn); + + return r; + } + } + + if (empty_info != 0) + mod_tlen = tlen + (SIZE_OP_NULL_CHECK_START + SIZE_OP_NULL_CHECK_END); + else + mod_tlen = tlen; + + if (infinite && qn->lower <= 1) { + if (qn->greedy) { + if (qn->lower == 1) { + r = add_opcode_rel_addr(reg, OP_JUMP, + (CKN_ON ? SIZE_OP_STATE_CHECK_PUSH : SIZE_OP_PUSH)); + if (r) return r; + } + + if (CKN_ON) { + r = add_opcode(reg, OP_STATE_CHECK_PUSH); + if (r) return r; + r = add_state_check_num(reg, ckn); + if (r) return r; + r = add_rel_addr(reg, mod_tlen + SIZE_OP_JUMP); + } + else { + r = add_opcode_rel_addr(reg, OP_PUSH, mod_tlen + SIZE_OP_JUMP); + } + if (r) return r; + r = compile_tree_empty_check(qn->target, reg, empty_info); + if (r) return r; + r = add_opcode_rel_addr(reg, OP_JUMP, + -(mod_tlen + (int )SIZE_OP_JUMP + + (int )(CKN_ON ? SIZE_OP_STATE_CHECK_PUSH : SIZE_OP_PUSH))); + } + else { + if (qn->lower == 0) { + r = add_opcode_rel_addr(reg, OP_JUMP, mod_tlen); + if (r) return r; + } + r = compile_tree_empty_check(qn->target, reg, empty_info); + if (r) return r; + if (CKN_ON) { + r = add_opcode(reg, OP_STATE_CHECK_PUSH_OR_JUMP); + if (r) return r; + r = add_state_check_num(reg, ckn); + if (r) return r; + r = add_rel_addr(reg, + -(mod_tlen + (int )SIZE_OP_STATE_CHECK_PUSH_OR_JUMP)); + } + else + r = add_opcode_rel_addr(reg, OP_PUSH, -(mod_tlen + (int )SIZE_OP_PUSH)); + } + } + else if (qn->upper == 0) { + if (qn->is_refered != 0) { /* /(?<n>..){0}/ */ + r = add_opcode_rel_addr(reg, OP_JUMP, tlen); + if (r) return r; + r = compile_tree(qn->target, reg); + } + else + r = 0; + } + else if (qn->upper == 1 && qn->greedy) { + if (qn->lower == 0) { + if (CKN_ON) { + r = add_opcode(reg, OP_STATE_CHECK_PUSH); + if (r) return r; + r = add_state_check_num(reg, ckn); + if (r) return r; + r = add_rel_addr(reg, tlen); + } + else { + r = add_opcode_rel_addr(reg, OP_PUSH, tlen); + } + if (r) return r; + } + + r = compile_tree(qn->target, reg); + } + else if (!qn->greedy && qn->upper == 1 && qn->lower == 0) { /* '??' */ + if (CKN_ON) { + r = add_opcode(reg, OP_STATE_CHECK_PUSH); + if (r) return r; + r = add_state_check_num(reg, ckn); + if (r) return r; + r = add_rel_addr(reg, SIZE_OP_JUMP); + } + else { + r = add_opcode_rel_addr(reg, OP_PUSH, SIZE_OP_JUMP); + } + + if (r) return r; + r = add_opcode_rel_addr(reg, OP_JUMP, tlen); + if (r) return r; + r = compile_tree(qn->target, reg); + } + else { + r = compile_range_repeat_node(qn, mod_tlen, empty_info, reg); + if (CKN_ON) { + if (r) return r; + r = add_opcode(reg, OP_STATE_CHECK); + if (r) return r; + r = add_state_check_num(reg, ckn); + } + } + return r; +} + +#else /* USE_COMBINATION_EXPLOSION_CHECK */ + +static int +compile_length_quantifier_node(QtfrNode* qn, regex_t* reg) +{ + int len, mod_tlen; + int infinite = IS_REPEAT_INFINITE(qn->upper); + int empty_info = qn->target_empty_info; + int tlen = compile_length_tree(qn->target, reg); + + if (tlen < 0) return tlen; + + /* anychar repeat */ + if (NTYPE(qn->target) == NT_CANY) { + if (qn->greedy && infinite) { + if (IS_NOT_NULL(qn->next_head_exact)) + return SIZE_OP_ANYCHAR_STAR_PEEK_NEXT + tlen * qn->lower; + else + return SIZE_OP_ANYCHAR_STAR + tlen * qn->lower; + } + } + + if (empty_info != 0) + mod_tlen = tlen + (SIZE_OP_NULL_CHECK_START + SIZE_OP_NULL_CHECK_END); + else + mod_tlen = tlen; + + if (infinite && + (qn->lower <= 1 || tlen * qn->lower <= QUANTIFIER_EXPAND_LIMIT_SIZE)) { + if (qn->lower == 1 && tlen > QUANTIFIER_EXPAND_LIMIT_SIZE) { + len = SIZE_OP_JUMP; + } + else { + len = tlen * qn->lower; + } + + if (qn->greedy) { + if (IS_NOT_NULL(qn->head_exact)) + len += SIZE_OP_PUSH_OR_JUMP_EXACT1 + mod_tlen + SIZE_OP_JUMP; + else if (IS_NOT_NULL(qn->next_head_exact)) + len += SIZE_OP_PUSH_IF_PEEK_NEXT + mod_tlen + SIZE_OP_JUMP; + else + len += SIZE_OP_PUSH + mod_tlen + SIZE_OP_JUMP; + } + else + len += SIZE_OP_JUMP + mod_tlen + SIZE_OP_PUSH; + } + else if (qn->upper == 0 && qn->is_refered != 0) { /* /(?<n>..){0}/ */ + len = SIZE_OP_JUMP + tlen; + } + else if (!infinite && qn->greedy && + (qn->upper == 1 || (tlen + SIZE_OP_PUSH) * qn->upper + <= QUANTIFIER_EXPAND_LIMIT_SIZE)) { + len = tlen * qn->lower; + len += (SIZE_OP_PUSH + tlen) * (qn->upper - qn->lower); + } + else if (!qn->greedy && qn->upper == 1 && qn->lower == 0) { /* '??' */ + len = SIZE_OP_PUSH + SIZE_OP_JUMP + tlen; + } + else { + len = SIZE_OP_REPEAT_INC + + mod_tlen + SIZE_OPCODE + SIZE_RELADDR + SIZE_MEMNUM; + } + + return len; +} + +static int +compile_quantifier_node(QtfrNode* qn, regex_t* reg) +{ + int i, r, mod_tlen; + int infinite = IS_REPEAT_INFINITE(qn->upper); + int empty_info = qn->target_empty_info; + int tlen = compile_length_tree(qn->target, reg); + + if (tlen < 0) return tlen; + + if (is_anychar_star_quantifier(qn)) { + r = compile_tree_n_times(qn->target, qn->lower, reg); + if (r) return r; + if (IS_NOT_NULL(qn->next_head_exact)) { + if (IS_MULTILINE(reg->options)) + r = add_opcode(reg, OP_ANYCHAR_ML_STAR_PEEK_NEXT); + else + r = add_opcode(reg, OP_ANYCHAR_STAR_PEEK_NEXT); + if (r) return r; + return add_bytes(reg, NSTR(qn->next_head_exact)->s, 1); + } + else { + if (IS_MULTILINE(reg->options)) + return add_opcode(reg, OP_ANYCHAR_ML_STAR); + else + return add_opcode(reg, OP_ANYCHAR_STAR); + } + } + + if (empty_info != 0) + mod_tlen = tlen + (SIZE_OP_NULL_CHECK_START + SIZE_OP_NULL_CHECK_END); + else + mod_tlen = tlen; + + if (infinite && + (qn->lower <= 1 || tlen * qn->lower <= QUANTIFIER_EXPAND_LIMIT_SIZE)) { + if (qn->lower == 1 && tlen > QUANTIFIER_EXPAND_LIMIT_SIZE) { + if (qn->greedy) { + if (IS_NOT_NULL(qn->head_exact)) + r = add_opcode_rel_addr(reg, OP_JUMP, SIZE_OP_PUSH_OR_JUMP_EXACT1); + else if (IS_NOT_NULL(qn->next_head_exact)) + r = add_opcode_rel_addr(reg, OP_JUMP, SIZE_OP_PUSH_IF_PEEK_NEXT); + else + r = add_opcode_rel_addr(reg, OP_JUMP, SIZE_OP_PUSH); + } + else { + r = add_opcode_rel_addr(reg, OP_JUMP, SIZE_OP_JUMP); + } + if (r) return r; + } + else { + r = compile_tree_n_times(qn->target, qn->lower, reg); + if (r) return r; + } + + if (qn->greedy) { + if (IS_NOT_NULL(qn->head_exact)) { + r = add_opcode_rel_addr(reg, OP_PUSH_OR_JUMP_EXACT1, + mod_tlen + SIZE_OP_JUMP); + if (r) return r; + add_bytes(reg, NSTR(qn->head_exact)->s, 1); + r = compile_tree_empty_check(qn->target, reg, empty_info); + if (r) return r; + r = add_opcode_rel_addr(reg, OP_JUMP, + -(mod_tlen + (int )SIZE_OP_JUMP + (int )SIZE_OP_PUSH_OR_JUMP_EXACT1)); + } + else if (IS_NOT_NULL(qn->next_head_exact)) { + r = add_opcode_rel_addr(reg, OP_PUSH_IF_PEEK_NEXT, + mod_tlen + SIZE_OP_JUMP); + if (r) return r; + add_bytes(reg, NSTR(qn->next_head_exact)->s, 1); + r = compile_tree_empty_check(qn->target, reg, empty_info); + if (r) return r; + r = add_opcode_rel_addr(reg, OP_JUMP, + -(mod_tlen + (int )SIZE_OP_JUMP + (int )SIZE_OP_PUSH_IF_PEEK_NEXT)); + } + else { + r = add_opcode_rel_addr(reg, OP_PUSH, mod_tlen + SIZE_OP_JUMP); + if (r) return r; + r = compile_tree_empty_check(qn->target, reg, empty_info); + if (r) return r; + r = add_opcode_rel_addr(reg, OP_JUMP, + -(mod_tlen + (int )SIZE_OP_JUMP + (int )SIZE_OP_PUSH)); + } + } + else { + r = add_opcode_rel_addr(reg, OP_JUMP, mod_tlen); + if (r) return r; + r = compile_tree_empty_check(qn->target, reg, empty_info); + if (r) return r; + r = add_opcode_rel_addr(reg, OP_PUSH, -(mod_tlen + (int )SIZE_OP_PUSH)); + } + } + else if (qn->upper == 0 && qn->is_refered != 0) { /* /(?<n>..){0}/ */ + r = add_opcode_rel_addr(reg, OP_JUMP, tlen); + if (r) return r; + r = compile_tree(qn->target, reg); + } + else if (!infinite && qn->greedy && + (qn->upper == 1 || (tlen + SIZE_OP_PUSH) * qn->upper + <= QUANTIFIER_EXPAND_LIMIT_SIZE)) { + int n = qn->upper - qn->lower; + + r = compile_tree_n_times(qn->target, qn->lower, reg); + if (r) return r; + + for (i = 0; i < n; i++) { + r = add_opcode_rel_addr(reg, OP_PUSH, + (n - i) * tlen + (n - i - 1) * SIZE_OP_PUSH); + if (r) return r; + r = compile_tree(qn->target, reg); + if (r) return r; + } + } + else if (!qn->greedy && qn->upper == 1 && qn->lower == 0) { /* '??' */ + r = add_opcode_rel_addr(reg, OP_PUSH, SIZE_OP_JUMP); + if (r) return r; + r = add_opcode_rel_addr(reg, OP_JUMP, tlen); + if (r) return r; + r = compile_tree(qn->target, reg); + } + else { + r = compile_range_repeat_node(qn, mod_tlen, empty_info, reg); + } + return r; +} +#endif /* USE_COMBINATION_EXPLOSION_CHECK */ + +static int +compile_length_option_node(EncloseNode* node, regex_t* reg) +{ + int tlen; + OnigOptionType prev = reg->options; + + reg->options = node->option; + tlen = compile_length_tree(node->target, reg); + reg->options = prev; + + if (tlen < 0) return tlen; + + if (IS_DYNAMIC_OPTION(prev ^ node->option)) { + return SIZE_OP_SET_OPTION_PUSH + SIZE_OP_SET_OPTION + SIZE_OP_FAIL + + tlen + SIZE_OP_SET_OPTION; + } + else + return tlen; +} + +static int +compile_option_node(EncloseNode* node, regex_t* reg) +{ + int r; + OnigOptionType prev = reg->options; + + if (IS_DYNAMIC_OPTION(prev ^ node->option)) { + r = add_opcode_option(reg, OP_SET_OPTION_PUSH, node->option); + if (r) return r; + r = add_opcode_option(reg, OP_SET_OPTION, prev); + if (r) return r; + r = add_opcode(reg, OP_FAIL); + if (r) return r; + } + + reg->options = node->option; + r = compile_tree(node->target, reg); + reg->options = prev; + + if (IS_DYNAMIC_OPTION(prev ^ node->option)) { + if (r) return r; + r = add_opcode_option(reg, OP_SET_OPTION, prev); + } + return r; +} + +static int +compile_length_enclose_node(EncloseNode* node, regex_t* reg) +{ + int len; + int tlen; + + if (node->type == ENCLOSE_OPTION) + return compile_length_option_node(node, reg); + + if (node->target) { + tlen = compile_length_tree(node->target, reg); + if (tlen < 0) return tlen; + } + else + tlen = 0; + + switch (node->type) { + case ENCLOSE_MEMORY: +#ifdef USE_SUBEXP_CALL + if (IS_ENCLOSE_CALLED(node)) { + len = SIZE_OP_MEMORY_START_PUSH + tlen + + SIZE_OP_CALL + SIZE_OP_JUMP + SIZE_OP_RETURN; + if (BIT_STATUS_AT(reg->bt_mem_end, node->regnum)) + len += (IS_ENCLOSE_RECURSION(node) + ? SIZE_OP_MEMORY_END_PUSH_REC : SIZE_OP_MEMORY_END_PUSH); + else + len += (IS_ENCLOSE_RECURSION(node) + ? SIZE_OP_MEMORY_END_REC : SIZE_OP_MEMORY_END); + } + else +#endif + { + if (BIT_STATUS_AT(reg->bt_mem_start, node->regnum)) + len = SIZE_OP_MEMORY_START_PUSH; + else + len = SIZE_OP_MEMORY_START; + + len += tlen + (BIT_STATUS_AT(reg->bt_mem_end, node->regnum) + ? SIZE_OP_MEMORY_END_PUSH : SIZE_OP_MEMORY_END); + } + break; + + case ENCLOSE_STOP_BACKTRACK: + if (IS_ENCLOSE_STOP_BT_SIMPLE_REPEAT(node)) { + QtfrNode* qn = NQTFR(node->target); + tlen = compile_length_tree(qn->target, reg); + if (tlen < 0) return tlen; + + len = tlen * qn->lower + + SIZE_OP_PUSH + tlen + SIZE_OP_POP + SIZE_OP_JUMP; + } + else { + len = SIZE_OP_PUSH_STOP_BT + tlen + SIZE_OP_POP_STOP_BT; + } + break; + + default: + return ONIGERR_TYPE_BUG; + break; + } + + return len; +} + +static int get_char_length_tree(Node* node, regex_t* reg, int* len); + +static int +compile_enclose_node(EncloseNode* node, regex_t* reg) +{ + int r, len; + + if (node->type == ENCLOSE_OPTION) + return compile_option_node(node, reg); + + switch (node->type) { + case ENCLOSE_MEMORY: +#ifdef USE_SUBEXP_CALL + if (IS_ENCLOSE_CALLED(node)) { + r = add_opcode(reg, OP_CALL); + if (r) return r; + node->call_addr = BBUF_GET_OFFSET_POS(reg) + SIZE_ABSADDR + SIZE_OP_JUMP; + node->state |= NST_ADDR_FIXED; + r = add_abs_addr(reg, (int )node->call_addr); + if (r) return r; + len = compile_length_tree(node->target, reg); + len += (SIZE_OP_MEMORY_START_PUSH + SIZE_OP_RETURN); + if (BIT_STATUS_AT(reg->bt_mem_end, node->regnum)) + len += (IS_ENCLOSE_RECURSION(node) + ? SIZE_OP_MEMORY_END_PUSH_REC : SIZE_OP_MEMORY_END_PUSH); + else + len += (IS_ENCLOSE_RECURSION(node) + ? SIZE_OP_MEMORY_END_REC : SIZE_OP_MEMORY_END); + + r = add_opcode_rel_addr(reg, OP_JUMP, len); + if (r) return r; + } +#endif + if (BIT_STATUS_AT(reg->bt_mem_start, node->regnum)) + r = add_opcode(reg, OP_MEMORY_START_PUSH); + else + r = add_opcode(reg, OP_MEMORY_START); + if (r) return r; + r = add_mem_num(reg, node->regnum); + if (r) return r; + r = compile_tree(node->target, reg); + if (r) return r; +#ifdef USE_SUBEXP_CALL + if (IS_ENCLOSE_CALLED(node)) { + if (BIT_STATUS_AT(reg->bt_mem_end, node->regnum)) + r = add_opcode(reg, (IS_ENCLOSE_RECURSION(node) + ? OP_MEMORY_END_PUSH_REC : OP_MEMORY_END_PUSH)); + else + r = add_opcode(reg, (IS_ENCLOSE_RECURSION(node) + ? OP_MEMORY_END_REC : OP_MEMORY_END)); + + if (r) return r; + r = add_mem_num(reg, node->regnum); + if (r) return r; + r = add_opcode(reg, OP_RETURN); + } + else +#endif + { + if (BIT_STATUS_AT(reg->bt_mem_end, node->regnum)) + r = add_opcode(reg, OP_MEMORY_END_PUSH); + else + r = add_opcode(reg, OP_MEMORY_END); + if (r) return r; + r = add_mem_num(reg, node->regnum); + } + break; + + case ENCLOSE_STOP_BACKTRACK: + if (IS_ENCLOSE_STOP_BT_SIMPLE_REPEAT(node)) { + QtfrNode* qn = NQTFR(node->target); + r = compile_tree_n_times(qn->target, qn->lower, reg); + if (r) return r; + + len = compile_length_tree(qn->target, reg); + if (len < 0) return len; + + r = add_opcode_rel_addr(reg, OP_PUSH, len + SIZE_OP_POP + SIZE_OP_JUMP); + if (r) return r; + r = compile_tree(qn->target, reg); + if (r) return r; + r = add_opcode(reg, OP_POP); + if (r) return r; + r = add_opcode_rel_addr(reg, OP_JUMP, + -((int )SIZE_OP_PUSH + len + (int )SIZE_OP_POP + (int )SIZE_OP_JUMP)); + } + else { + r = add_opcode(reg, OP_PUSH_STOP_BT); + if (r) return r; + r = compile_tree(node->target, reg); + if (r) return r; + r = add_opcode(reg, OP_POP_STOP_BT); + } + break; + + default: + return ONIGERR_TYPE_BUG; + break; + } + + return r; +} + +static int +compile_length_anchor_node(AnchorNode* node, regex_t* reg) +{ + int len; + int tlen = 0; + + if (node->target) { + tlen = compile_length_tree(node->target, reg); + if (tlen < 0) return tlen; + } + + switch (node->type) { + case ANCHOR_PREC_READ: + len = SIZE_OP_PUSH_POS + tlen + SIZE_OP_POP_POS; + break; + case ANCHOR_PREC_READ_NOT: + len = SIZE_OP_PUSH_POS_NOT + tlen + SIZE_OP_FAIL_POS; + break; + case ANCHOR_LOOK_BEHIND: + len = SIZE_OP_LOOK_BEHIND + tlen; + break; + case ANCHOR_LOOK_BEHIND_NOT: + len = SIZE_OP_PUSH_LOOK_BEHIND_NOT + tlen + SIZE_OP_FAIL_LOOK_BEHIND_NOT; + break; + + default: + len = SIZE_OPCODE; + break; + } + + return len; +} + +static int +compile_anchor_node(AnchorNode* node, regex_t* reg) +{ + int r, len; + + switch (node->type) { + case ANCHOR_BEGIN_BUF: r = add_opcode(reg, OP_BEGIN_BUF); break; + case ANCHOR_END_BUF: r = add_opcode(reg, OP_END_BUF); break; + case ANCHOR_BEGIN_LINE: r = add_opcode(reg, OP_BEGIN_LINE); break; + case ANCHOR_END_LINE: r = add_opcode(reg, OP_END_LINE); break; + case ANCHOR_SEMI_END_BUF: r = add_opcode(reg, OP_SEMI_END_BUF); break; + case ANCHOR_BEGIN_POSITION: r = add_opcode(reg, OP_BEGIN_POSITION); break; + + case ANCHOR_WORD_BOUND: r = add_opcode(reg, OP_WORD_BOUND); break; + case ANCHOR_NOT_WORD_BOUND: r = add_opcode(reg, OP_NOT_WORD_BOUND); break; +#ifdef USE_WORD_BEGIN_END + case ANCHOR_WORD_BEGIN: r = add_opcode(reg, OP_WORD_BEGIN); break; + case ANCHOR_WORD_END: r = add_opcode(reg, OP_WORD_END); break; +#endif + + case ANCHOR_PREC_READ: + r = add_opcode(reg, OP_PUSH_POS); + if (r) return r; + r = compile_tree(node->target, reg); + if (r) return r; + r = add_opcode(reg, OP_POP_POS); + break; + + case ANCHOR_PREC_READ_NOT: + len = compile_length_tree(node->target, reg); + if (len < 0) return len; + r = add_opcode_rel_addr(reg, OP_PUSH_POS_NOT, len + SIZE_OP_FAIL_POS); + if (r) return r; + r = compile_tree(node->target, reg); + if (r) return r; + r = add_opcode(reg, OP_FAIL_POS); + break; + + case ANCHOR_LOOK_BEHIND: + { + int n; + r = add_opcode(reg, OP_LOOK_BEHIND); + if (r) return r; + if (node->char_len < 0) { + r = get_char_length_tree(node->target, reg, &n); + if (r) return ONIGERR_INVALID_LOOK_BEHIND_PATTERN; + } + else + n = node->char_len; + r = add_length(reg, n); + if (r) return r; + r = compile_tree(node->target, reg); + } + break; + + case ANCHOR_LOOK_BEHIND_NOT: + { + int n; + len = compile_length_tree(node->target, reg); + r = add_opcode_rel_addr(reg, OP_PUSH_LOOK_BEHIND_NOT, + len + SIZE_OP_FAIL_LOOK_BEHIND_NOT); + if (r) return r; + if (node->char_len < 0) { + r = get_char_length_tree(node->target, reg, &n); + if (r) return ONIGERR_INVALID_LOOK_BEHIND_PATTERN; + } + else + n = node->char_len; + r = add_length(reg, n); + if (r) return r; + r = compile_tree(node->target, reg); + if (r) return r; + r = add_opcode(reg, OP_FAIL_LOOK_BEHIND_NOT); + } + break; + + default: + return ONIGERR_TYPE_BUG; + break; + } + + return r; +} + +static int +compile_length_tree(Node* node, regex_t* reg) +{ + int len, type, r; + + type = NTYPE(node); + switch (type) { + case NT_LIST: + len = 0; + do { + r = compile_length_tree(NCAR(node), reg); + if (r < 0) return r; + len += r; + } while (IS_NOT_NULL(node = NCDR(node))); + r = len; + break; + + case NT_ALT: + { + int n; + + n = r = 0; + do { + r += compile_length_tree(NCAR(node), reg); + n++; + } while (IS_NOT_NULL(node = NCDR(node))); + r += (SIZE_OP_PUSH + SIZE_OP_JUMP) * (n - 1); + } + break; + + case NT_STR: + if (NSTRING_IS_RAW(node)) + r = compile_length_string_raw_node(NSTR(node), reg); + else + r = compile_length_string_node(node, reg); + break; + + case NT_CCLASS: + r = compile_length_cclass_node(NCCLASS(node), reg); + break; + + case NT_CTYPE: + case NT_CANY: + r = SIZE_OPCODE; + break; + + case NT_BREF: + { + BRefNode* br = NBREF(node); + +#ifdef USE_BACKREF_WITH_LEVEL + if (IS_BACKREF_NEST_LEVEL(br)) { + r = SIZE_OPCODE + SIZE_OPTION + SIZE_LENGTH + + SIZE_LENGTH + (SIZE_MEMNUM * br->back_num); + } + else +#endif + if (br->back_num == 1) { + r = ((!IS_IGNORECASE(reg->options) && br->back_static[0] <= 2) + ? SIZE_OPCODE : (SIZE_OPCODE + SIZE_MEMNUM)); + } + else { + r = SIZE_OPCODE + SIZE_LENGTH + (SIZE_MEMNUM * br->back_num); + } + } + break; + +#ifdef USE_SUBEXP_CALL + case NT_CALL: + r = SIZE_OP_CALL; + break; +#endif + + case NT_QTFR: + r = compile_length_quantifier_node(NQTFR(node), reg); + break; + + case NT_ENCLOSE: + r = compile_length_enclose_node(NENCLOSE(node), reg); + break; + + case NT_ANCHOR: + r = compile_length_anchor_node(NANCHOR(node), reg); + break; + + default: + return ONIGERR_TYPE_BUG; + break; + } + + return r; +} + +static int +compile_tree(Node* node, regex_t* reg) +{ + int n, type, len, pos, r = 0; + + type = NTYPE(node); + switch (type) { + case NT_LIST: + do { + r = compile_tree(NCAR(node), reg); + } while (r == 0 && IS_NOT_NULL(node = NCDR(node))); + break; + + case NT_ALT: + { + Node* x = node; + len = 0; + do { + len += compile_length_tree(NCAR(x), reg); + if (NCDR(x) != NULL) { + len += SIZE_OP_PUSH + SIZE_OP_JUMP; + } + } while (IS_NOT_NULL(x = NCDR(x))); + pos = reg->used + len; /* goal position */ + + do { + len = compile_length_tree(NCAR(node), reg); + if (IS_NOT_NULL(NCDR(node))) { + r = add_opcode_rel_addr(reg, OP_PUSH, len + SIZE_OP_JUMP); + if (r) break; + } + r = compile_tree(NCAR(node), reg); + if (r) break; + if (IS_NOT_NULL(NCDR(node))) { + len = pos - (reg->used + SIZE_OP_JUMP); + r = add_opcode_rel_addr(reg, OP_JUMP, len); + if (r) break; + } + } while (IS_NOT_NULL(node = NCDR(node))); + } + break; + + case NT_STR: + if (NSTRING_IS_RAW(node)) + r = compile_string_raw_node(NSTR(node), reg); + else + r = compile_string_node(node, reg); + break; + + case NT_CCLASS: + r = compile_cclass_node(NCCLASS(node), reg); + break; + + case NT_CTYPE: + { + int op; + + switch (NCTYPE(node)->ctype) { + case ONIGENC_CTYPE_WORD: + if (NCTYPE(node)->not != 0) op = OP_NOT_WORD; + else op = OP_WORD; + break; + default: + return ONIGERR_TYPE_BUG; + break; + } + r = add_opcode(reg, op); + } + break; + + case NT_CANY: + if (IS_MULTILINE(reg->options)) + r = add_opcode(reg, OP_ANYCHAR_ML); + else + r = add_opcode(reg, OP_ANYCHAR); + break; + + case NT_BREF: + { + BRefNode* br = NBREF(node); + +#ifdef USE_BACKREF_WITH_LEVEL + if (IS_BACKREF_NEST_LEVEL(br)) { + r = add_opcode(reg, OP_BACKREF_WITH_LEVEL); + if (r) return r; + r = add_option(reg, (reg->options & ONIG_OPTION_IGNORECASE)); + if (r) return r; + r = add_length(reg, br->nest_level); + if (r) return r; + + goto add_bacref_mems; + } + else +#endif + if (br->back_num == 1) { + n = br->back_static[0]; + if (IS_IGNORECASE(reg->options)) { + r = add_opcode(reg, OP_BACKREFN_IC); + if (r) return r; + r = add_mem_num(reg, n); + } + else { + switch (n) { + case 1: r = add_opcode(reg, OP_BACKREF1); break; + case 2: r = add_opcode(reg, OP_BACKREF2); break; + default: + r = add_opcode(reg, OP_BACKREFN); + if (r) return r; + r = add_mem_num(reg, n); + break; + } + } + } + else { + int i; + int* p; + + if (IS_IGNORECASE(reg->options)) { + r = add_opcode(reg, OP_BACKREF_MULTI_IC); + } + else { + r = add_opcode(reg, OP_BACKREF_MULTI); + } + if (r) return r; + +#ifdef USE_BACKREF_WITH_LEVEL + add_bacref_mems: +#endif + r = add_length(reg, br->back_num); + if (r) return r; + p = BACKREFS_P(br); + for (i = br->back_num - 1; i >= 0; i--) { + r = add_mem_num(reg, p[i]); + if (r) return r; + } + } + } + break; + +#ifdef USE_SUBEXP_CALL + case NT_CALL: + r = compile_call(NCALL(node), reg); + break; +#endif + + case NT_QTFR: + r = compile_quantifier_node(NQTFR(node), reg); + break; + + case NT_ENCLOSE: + r = compile_enclose_node(NENCLOSE(node), reg); + break; + + case NT_ANCHOR: + r = compile_anchor_node(NANCHOR(node), reg); + break; + + default: +#ifdef ONIG_DEBUG + fprintf(stderr, "compile_tree: undefined node type %d\n", NTYPE(node)); +#endif + break; + } + + return r; +} + +#ifdef USE_NAMED_GROUP + +static int +noname_disable_map(Node** plink, GroupNumRemap* map, int* counter) +{ + int r = 0; + Node* node = *plink; + + switch (NTYPE(node)) { + case NT_LIST: + case NT_ALT: + do { + r = noname_disable_map(&(NCAR(node)), map, counter); + } while (r == 0 && IS_NOT_NULL(node = NCDR(node))); + break; + + case NT_QTFR: + { + Node** ptarget = &(NQTFR(node)->target); + Node* old = *ptarget; + r = noname_disable_map(ptarget, map, counter); + if (*ptarget != old && NTYPE(*ptarget) == NT_QTFR) { + onig_reduce_nested_quantifier(node, *ptarget); + } + } + break; + + case NT_ENCLOSE: + { + EncloseNode* en = NENCLOSE(node); + if (en->type == ENCLOSE_MEMORY) { + if (IS_ENCLOSE_NAMED_GROUP(en)) { + (*counter)++; + map[en->regnum].new_val = *counter; + en->regnum = *counter; + r = noname_disable_map(&(en->target), map, counter); + } + else { + *plink = en->target; + en->target = NULL_NODE; + onig_node_free(node); + r = noname_disable_map(plink, map, counter); + } + } + else + r = noname_disable_map(&(en->target), map, counter); + } + break; + + default: + break; + } + + return r; +} + +static int +renumber_node_backref(Node* node, GroupNumRemap* map) +{ + int i, pos, n, old_num; + int *backs; + BRefNode* bn = NBREF(node); + + if (! IS_BACKREF_NAME_REF(bn)) + return ONIGERR_NUMBERED_BACKREF_OR_CALL_NOT_ALLOWED; + + old_num = bn->back_num; + if (IS_NULL(bn->back_dynamic)) + backs = bn->back_static; + else + backs = bn->back_dynamic; + + for (i = 0, pos = 0; i < old_num; i++) { + n = map[backs[i]].new_val; + if (n > 0) { + backs[pos] = n; + pos++; + } + } + + bn->back_num = pos; + return 0; +} + +static int +renumber_by_map(Node* node, GroupNumRemap* map) +{ + int r = 0; + + switch (NTYPE(node)) { + case NT_LIST: + case NT_ALT: + do { + r = renumber_by_map(NCAR(node), map); + } while (r == 0 && IS_NOT_NULL(node = NCDR(node))); + break; + case NT_QTFR: + r = renumber_by_map(NQTFR(node)->target, map); + break; + case NT_ENCLOSE: + r = renumber_by_map(NENCLOSE(node)->target, map); + break; + + case NT_BREF: + r = renumber_node_backref(node, map); + break; + + default: + break; + } + + return r; +} + +static int +numbered_ref_check(Node* node) +{ + int r = 0; + + switch (NTYPE(node)) { + case NT_LIST: + case NT_ALT: + do { + r = numbered_ref_check(NCAR(node)); + } while (r == 0 && IS_NOT_NULL(node = NCDR(node))); + break; + case NT_QTFR: + r = numbered_ref_check(NQTFR(node)->target); + break; + case NT_ENCLOSE: + r = numbered_ref_check(NENCLOSE(node)->target); + break; + + case NT_BREF: + if (! IS_BACKREF_NAME_REF(NBREF(node))) + return ONIGERR_NUMBERED_BACKREF_OR_CALL_NOT_ALLOWED; + break; + + default: + break; + } + + return r; +} + +static int +disable_noname_group_capture(Node** root, regex_t* reg, ScanEnv* env) +{ + int r, i, pos, counter; + BitStatusType loc; + GroupNumRemap* map; + + map = (GroupNumRemap* )xalloca(sizeof(GroupNumRemap) * (env->num_mem + 1)); + CHECK_NULL_RETURN_MEMERR(map); + for (i = 1; i <= env->num_mem; i++) { + map[i].new_val = 0; + } + counter = 0; + r = noname_disable_map(root, map, &counter); + if (r != 0) return r; + + r = renumber_by_map(*root, map); + if (r != 0) return r; + + for (i = 1, pos = 1; i <= env->num_mem; i++) { + if (map[i].new_val > 0) { + SCANENV_MEM_NODES(env)[pos] = SCANENV_MEM_NODES(env)[i]; + pos++; + } + } + + loc = env->capture_history; + BIT_STATUS_CLEAR(env->capture_history); + for (i = 1; i <= ONIG_MAX_CAPTURE_HISTORY_GROUP; i++) { + if (BIT_STATUS_AT(loc, i)) { + BIT_STATUS_ON_AT_SIMPLE(env->capture_history, map[i].new_val); + } + } + + env->num_mem = env->num_named; + reg->num_mem = env->num_named; + + return onig_renumber_name_table(reg, map); +} +#endif /* USE_NAMED_GROUP */ + +#ifdef USE_SUBEXP_CALL +static int +unset_addr_list_fix(UnsetAddrList* uslist, regex_t* reg) +{ + int i, offset; + EncloseNode* en; + AbsAddrType addr; + + for (i = 0; i < uslist->num; i++) { + en = NENCLOSE(uslist->us[i].target); + if (! IS_ENCLOSE_ADDR_FIXED(en)) return ONIGERR_PARSER_BUG; + addr = en->call_addr; + offset = uslist->us[i].offset; + + BBUF_WRITE(reg, offset, &addr, SIZE_ABSADDR); + } + return 0; +} +#endif + +#ifdef USE_MONOMANIAC_CHECK_CAPTURES_IN_ENDLESS_REPEAT +static int +quantifiers_memory_node_info(Node* node) +{ + int r = 0; + + switch (NTYPE(node)) { + case NT_LIST: + case NT_ALT: + { + int v; + do { + v = quantifiers_memory_node_info(NCAR(node)); + if (v > r) r = v; + } while (v >= 0 && IS_NOT_NULL(node = NCDR(node))); + } + break; + +#ifdef USE_SUBEXP_CALL + case NT_CALL: + if (IS_CALL_RECURSION(NCALL(node))) { + return NQ_TARGET_IS_EMPTY_REC; /* tiny version */ + } + else + r = quantifiers_memory_node_info(NCALL(node)->target); + break; +#endif + + case NT_QTFR: + { + QtfrNode* qn = NQTFR(node); + if (qn->upper != 0) { + r = quantifiers_memory_node_info(qn->target); + } + } + break; + + case NT_ENCLOSE: + { + EncloseNode* en = NENCLOSE(node); + switch (en->type) { + case ENCLOSE_MEMORY: + return NQ_TARGET_IS_EMPTY_MEM; + break; + + case ENCLOSE_OPTION: + case ENCLOSE_STOP_BACKTRACK: + r = quantifiers_memory_node_info(en->target); + break; + default: + break; + } + } + break; + + case NT_BREF: + case NT_STR: + case NT_CTYPE: + case NT_CCLASS: + case NT_CANY: + case NT_ANCHOR: + default: + break; + } + + return r; +} +#endif /* USE_MONOMANIAC_CHECK_CAPTURES_IN_ENDLESS_REPEAT */ + +static int +get_min_match_length(Node* node, OnigDistance *min, ScanEnv* env) +{ + OnigDistance tmin; + int r = 0; + + *min = 0; + switch (NTYPE(node)) { + case NT_BREF: + { + int i; + int* backs; + Node** nodes = SCANENV_MEM_NODES(env); + BRefNode* br = NBREF(node); + if (br->state & NST_RECURSION) break; + + backs = BACKREFS_P(br); + if (backs[0] > env->num_mem) return ONIGERR_INVALID_BACKREF; + r = get_min_match_length(nodes[backs[0]], min, env); + if (r != 0) break; + for (i = 1; i < br->back_num; i++) { + if (backs[i] > env->num_mem) return ONIGERR_INVALID_BACKREF; + r = get_min_match_length(nodes[backs[i]], &tmin, env); + if (r != 0) break; + if (*min > tmin) *min = tmin; + } + } + break; + +#ifdef USE_SUBEXP_CALL + case NT_CALL: + if (IS_CALL_RECURSION(NCALL(node))) { + EncloseNode* en = NENCLOSE(NCALL(node)->target); + if (IS_ENCLOSE_MIN_FIXED(en)) + *min = en->min_len; + } + else + r = get_min_match_length(NCALL(node)->target, min, env); + break; +#endif + + case NT_LIST: + do { + r = get_min_match_length(NCAR(node), &tmin, env); + if (r == 0) *min += tmin; + } while (r == 0 && IS_NOT_NULL(node = NCDR(node))); + break; + + case NT_ALT: + { + Node *x, *y; + y = node; + do { + x = NCAR(y); + r = get_min_match_length(x, &tmin, env); + if (r != 0) break; + if (y == node) *min = tmin; + else if (*min > tmin) *min = tmin; + } while (r == 0 && IS_NOT_NULL(y = NCDR(y))); + } + break; + + case NT_STR: + { + StrNode* sn = NSTR(node); + *min = sn->end - sn->s; + } + break; + + case NT_CTYPE: + *min = 1; + break; + + case NT_CCLASS: + case NT_CANY: + *min = 1; + break; + + case NT_QTFR: + { + QtfrNode* qn = NQTFR(node); + + if (qn->lower > 0) { + r = get_min_match_length(qn->target, min, env); + if (r == 0) + *min = distance_multiply(*min, qn->lower); + } + } + break; + + case NT_ENCLOSE: + { + EncloseNode* en = NENCLOSE(node); + switch (en->type) { + case ENCLOSE_MEMORY: +#ifdef USE_SUBEXP_CALL + if (IS_ENCLOSE_MIN_FIXED(en)) + *min = en->min_len; + else { + r = get_min_match_length(en->target, min, env); + if (r == 0) { + en->min_len = *min; + SET_ENCLOSE_STATUS(node, NST_MIN_FIXED); + } + } + break; +#endif + case ENCLOSE_OPTION: + case ENCLOSE_STOP_BACKTRACK: + r = get_min_match_length(en->target, min, env); + break; + } + } + break; + + case NT_ANCHOR: + default: + break; + } + + return r; +} + +static int +get_max_match_length(Node* node, OnigDistance *max, ScanEnv* env) +{ + OnigDistance tmax; + int r = 0; + + *max = 0; + switch (NTYPE(node)) { + case NT_LIST: + do { + r = get_max_match_length(NCAR(node), &tmax, env); + if (r == 0) + *max = distance_add(*max, tmax); + } while (r == 0 && IS_NOT_NULL(node = NCDR(node))); + break; + + case NT_ALT: + do { + r = get_max_match_length(NCAR(node), &tmax, env); + if (r == 0 && *max < tmax) *max = tmax; + } while (r == 0 && IS_NOT_NULL(node = NCDR(node))); + break; + + case NT_STR: + { + StrNode* sn = NSTR(node); + *max = sn->end - sn->s; + } + break; + + case NT_CTYPE: + *max = ONIGENC_MBC_MAXLEN_DIST(env->enc); + break; + + case NT_CCLASS: + case NT_CANY: + *max = ONIGENC_MBC_MAXLEN_DIST(env->enc); + break; + + case NT_BREF: + { + int i; + int* backs; + Node** nodes = SCANENV_MEM_NODES(env); + BRefNode* br = NBREF(node); + if (br->state & NST_RECURSION) { + *max = ONIG_INFINITE_DISTANCE; + break; + } + backs = BACKREFS_P(br); + for (i = 0; i < br->back_num; i++) { + if (backs[i] > env->num_mem) return ONIGERR_INVALID_BACKREF; + r = get_max_match_length(nodes[backs[i]], &tmax, env); + if (r != 0) break; + if (*max < tmax) *max = tmax; + } + } + break; + +#ifdef USE_SUBEXP_CALL + case NT_CALL: + if (! IS_CALL_RECURSION(NCALL(node))) + r = get_max_match_length(NCALL(node)->target, max, env); + else + *max = ONIG_INFINITE_DISTANCE; + break; +#endif + + case NT_QTFR: + { + QtfrNode* qn = NQTFR(node); + + if (qn->upper != 0) { + r = get_max_match_length(qn->target, max, env); + if (r == 0 && *max != 0) { + if (! IS_REPEAT_INFINITE(qn->upper)) + *max = distance_multiply(*max, qn->upper); + else + *max = ONIG_INFINITE_DISTANCE; + } + } + } + break; + + case NT_ENCLOSE: + { + EncloseNode* en = NENCLOSE(node); + switch (en->type) { + case ENCLOSE_MEMORY: +#ifdef USE_SUBEXP_CALL + if (IS_ENCLOSE_MAX_FIXED(en)) + *max = en->max_len; + else { + r = get_max_match_length(en->target, max, env); + if (r == 0) { + en->max_len = *max; + SET_ENCLOSE_STATUS(node, NST_MAX_FIXED); + } + } + break; +#endif + case ENCLOSE_OPTION: + case ENCLOSE_STOP_BACKTRACK: + r = get_max_match_length(en->target, max, env); + break; + } + } + break; + + case NT_ANCHOR: + default: + break; + } + + return r; +} + +#define GET_CHAR_LEN_VARLEN -1 +#define GET_CHAR_LEN_TOP_ALT_VARLEN -2 + +/* fixed size pattern node only */ +static int +get_char_length_tree1(Node* node, regex_t* reg, int* len, int level) +{ + int tlen; + int r = 0; + + level++; + *len = 0; + switch (NTYPE(node)) { + case NT_LIST: + do { + r = get_char_length_tree1(NCAR(node), reg, &tlen, level); + if (r == 0) + *len = distance_add(*len, tlen); + } while (r == 0 && IS_NOT_NULL(node = NCDR(node))); + break; + + case NT_ALT: + { + int tlen2; + int varlen = 0; + + r = get_char_length_tree1(NCAR(node), reg, &tlen, level); + while (r == 0 && IS_NOT_NULL(node = NCDR(node))) { + r = get_char_length_tree1(NCAR(node), reg, &tlen2, level); + if (r == 0) { + if (tlen != tlen2) + varlen = 1; + } + } + if (r == 0) { + if (varlen != 0) { + if (level == 1) + r = GET_CHAR_LEN_TOP_ALT_VARLEN; + else + r = GET_CHAR_LEN_VARLEN; + } + else + *len = tlen; + } + } + break; + + case NT_STR: + { + StrNode* sn = NSTR(node); + UChar *s = sn->s; + while (s < sn->end) { + s += enclen(reg->enc, s, sn->end); + (*len)++; + } + } + break; + + case NT_QTFR: + { + QtfrNode* qn = NQTFR(node); + if (qn->lower == qn->upper) { + r = get_char_length_tree1(qn->target, reg, &tlen, level); + if (r == 0) + *len = distance_multiply(tlen, qn->lower); + } + else + r = GET_CHAR_LEN_VARLEN; + } + break; + +#ifdef USE_SUBEXP_CALL + case NT_CALL: + if (! IS_CALL_RECURSION(NCALL(node))) + r = get_char_length_tree1(NCALL(node)->target, reg, len, level); + else + r = GET_CHAR_LEN_VARLEN; + break; +#endif + + case NT_CTYPE: + *len = 1; + break; + + case NT_CCLASS: + case NT_CANY: + *len = 1; + break; + + case NT_ENCLOSE: + { + EncloseNode* en = NENCLOSE(node); + switch (en->type) { + case ENCLOSE_MEMORY: +#ifdef USE_SUBEXP_CALL + if (IS_ENCLOSE_CLEN_FIXED(en)) + *len = en->char_len; + else { + r = get_char_length_tree1(en->target, reg, len, level); + if (r == 0) { + en->char_len = *len; + SET_ENCLOSE_STATUS(node, NST_CLEN_FIXED); + } + } + break; +#endif + case ENCLOSE_OPTION: + case ENCLOSE_STOP_BACKTRACK: + r = get_char_length_tree1(en->target, reg, len, level); + break; + default: + break; + } + } + break; + + case NT_ANCHOR: + break; + + default: + r = GET_CHAR_LEN_VARLEN; + break; + } + + return r; +} + +static int +get_char_length_tree(Node* node, regex_t* reg, int* len) +{ + return get_char_length_tree1(node, reg, len, 0); +} + +/* x is not included y ==> 1 : 0 */ +static int +is_not_included(Node* x, Node* y, regex_t* reg) +{ + int i, len; + OnigCodePoint code; + UChar *p, c; + int ytype; + + retry: + ytype = NTYPE(y); + switch (NTYPE(x)) { + case NT_CTYPE: + { + switch (ytype) { + case NT_CTYPE: + if (NCTYPE(y)->ctype == NCTYPE(x)->ctype && + NCTYPE(y)->not != NCTYPE(x)->not) + return 1; + else + return 0; + break; + + case NT_CCLASS: + swap: + { + Node* tmp; + tmp = x; x = y; y = tmp; + goto retry; + } + break; + + case NT_STR: + goto swap; + break; + + default: + break; + } + } + break; + + case NT_CCLASS: + { + CClassNode* xc = NCCLASS(x); + switch (ytype) { + case NT_CTYPE: + switch (NCTYPE(y)->ctype) { + case ONIGENC_CTYPE_WORD: + if (NCTYPE(y)->not == 0) { + if (IS_NULL(xc->mbuf) && !IS_NCCLASS_NOT(xc)) { + for (i = 0; i < SINGLE_BYTE_SIZE; i++) { + if (BITSET_AT(xc->bs, i)) { + if (IS_CODE_SB_WORD(reg->enc, i)) return 0; + } + } + return 1; + } + return 0; + } + else { + for (i = 0; i < SINGLE_BYTE_SIZE; i++) { + if (! IS_CODE_SB_WORD(reg->enc, i)) { + if (!IS_NCCLASS_NOT(xc)) { + if (BITSET_AT(xc->bs, i)) + return 0; + } + else { + if (! BITSET_AT(xc->bs, i)) + return 0; + } + } + } + return 1; + } + break; + + default: + break; + } + break; + + case NT_CCLASS: + { + int v; + CClassNode* yc = NCCLASS(y); + + for (i = 0; i < SINGLE_BYTE_SIZE; i++) { + v = BITSET_AT(xc->bs, i); + if ((v != 0 && !IS_NCCLASS_NOT(xc)) || + (v == 0 && IS_NCCLASS_NOT(xc))) { + v = BITSET_AT(yc->bs, i); + if ((v != 0 && !IS_NCCLASS_NOT(yc)) || + (v == 0 && IS_NCCLASS_NOT(yc))) + return 0; + } + } + if ((IS_NULL(xc->mbuf) && !IS_NCCLASS_NOT(xc)) || + (IS_NULL(yc->mbuf) && !IS_NCCLASS_NOT(yc))) + return 1; + return 0; + } + break; + + case NT_STR: + goto swap; + break; + + default: + break; + } + } + break; + + case NT_STR: + { + StrNode* xs = NSTR(x); + if (NSTRING_LEN(x) == 0) + break; + + c = *(xs->s); + switch (ytype) { + case NT_CTYPE: + switch (NCTYPE(y)->ctype) { + case ONIGENC_CTYPE_WORD: + if (ONIGENC_IS_MBC_WORD(reg->enc, xs->s, xs->end)) + return NCTYPE(y)->not; + else + return !(NCTYPE(y)->not); + break; + default: + break; + } + break; + + case NT_CCLASS: + { + CClassNode* cc = NCCLASS(y); + + code = ONIGENC_MBC_TO_CODE(reg->enc, xs->s, + xs->s + ONIGENC_MBC_MAXLEN(reg->enc)); + return (onig_is_code_in_cc(reg->enc, code, cc) != 0 ? 0 : 1); + } + break; + + case NT_STR: + { + UChar *q; + StrNode* ys = NSTR(y); + len = NSTRING_LEN(x); + if (len > NSTRING_LEN(y)) len = NSTRING_LEN(y); + if (NSTRING_IS_AMBIG(x) || NSTRING_IS_AMBIG(y)) { + /* tiny version */ + return 0; + } + else { + for (i = 0, p = ys->s, q = xs->s; i < len; i++, p++, q++) { + if (*p != *q) return 1; + } + } + } + break; + + default: + break; + } + } + break; + + default: + break; + } + + return 0; +} + +static Node* +get_head_value_node(Node* node, int exact, regex_t* reg) +{ + Node* n = NULL_NODE; + + switch (NTYPE(node)) { + case NT_BREF: + case NT_ALT: + case NT_CANY: +#ifdef USE_SUBEXP_CALL + case NT_CALL: +#endif + break; + + case NT_CTYPE: + case NT_CCLASS: + if (exact == 0) { + n = node; + } + break; + + case NT_LIST: + n = get_head_value_node(NCAR(node), exact, reg); + break; + + case NT_STR: + { + StrNode* sn = NSTR(node); + + if (sn->end <= sn->s) + break; + + if (exact != 0 && + !NSTRING_IS_RAW(node) && IS_IGNORECASE(reg->options)) { + } + else { + n = node; + } + } + break; + + case NT_QTFR: + { + QtfrNode* qn = NQTFR(node); + if (qn->lower > 0) { + if (IS_NOT_NULL(qn->head_exact)) + n = qn->head_exact; + else + n = get_head_value_node(qn->target, exact, reg); + } + } + break; + + case NT_ENCLOSE: + { + EncloseNode* en = NENCLOSE(node); + switch (en->type) { + case ENCLOSE_OPTION: + { + OnigOptionType options = reg->options; + + reg->options = NENCLOSE(node)->option; + n = get_head_value_node(NENCLOSE(node)->target, exact, reg); + reg->options = options; + } + break; + + case ENCLOSE_MEMORY: + case ENCLOSE_STOP_BACKTRACK: + n = get_head_value_node(en->target, exact, reg); + break; + } + } + break; + + case NT_ANCHOR: + if (NANCHOR(node)->type == ANCHOR_PREC_READ) + n = get_head_value_node(NANCHOR(node)->target, exact, reg); + break; + + default: + break; + } + + return n; +} + +static int +check_type_tree(Node* node, int type_mask, int enclose_mask, int anchor_mask) +{ + int type, r = 0; + + type = NTYPE(node); + if ((NTYPE2BIT(type) & type_mask) == 0) + return 1; + + switch (type) { + case NT_LIST: + case NT_ALT: + do { + r = check_type_tree(NCAR(node), type_mask, enclose_mask, + anchor_mask); + } while (r == 0 && IS_NOT_NULL(node = NCDR(node))); + break; + + case NT_QTFR: + r = check_type_tree(NQTFR(node)->target, type_mask, enclose_mask, + anchor_mask); + break; + + case NT_ENCLOSE: + { + EncloseNode* en = NENCLOSE(node); + if ((en->type & enclose_mask) == 0) + return 1; + + r = check_type_tree(en->target, type_mask, enclose_mask, anchor_mask); + } + break; + + case NT_ANCHOR: + type = NANCHOR(node)->type; + if ((type & anchor_mask) == 0) + return 1; + + if (NANCHOR(node)->target) + r = check_type_tree(NANCHOR(node)->target, + type_mask, enclose_mask, anchor_mask); + break; + + default: + break; + } + return r; +} + +#ifdef USE_SUBEXP_CALL + +#define RECURSION_EXIST 1 +#define RECURSION_INFINITE 2 + +static int +subexp_inf_recursive_check(Node* node, ScanEnv* env, int head) +{ + int type; + int r = 0; + + type = NTYPE(node); + switch (type) { + case NT_LIST: + { + Node *x; + OnigDistance min; + int ret; + + x = node; + do { + ret = subexp_inf_recursive_check(NCAR(x), env, head); + if (ret < 0 || ret == RECURSION_INFINITE) return ret; + r |= ret; + if (head) { + ret = get_min_match_length(NCAR(x), &min, env); + if (ret != 0) return ret; + if (min != 0) head = 0; + } + } while (IS_NOT_NULL(x = NCDR(x))); + } + break; + + case NT_ALT: + { + int ret; + r = RECURSION_EXIST; + do { + ret = subexp_inf_recursive_check(NCAR(node), env, head); + if (ret < 0 || ret == RECURSION_INFINITE) return ret; + r &= ret; + } while (IS_NOT_NULL(node = NCDR(node))); + } + break; + + case NT_QTFR: + r = subexp_inf_recursive_check(NQTFR(node)->target, env, head); + if (r == RECURSION_EXIST) { + if (NQTFR(node)->lower == 0) r = 0; + } + break; + + case NT_ANCHOR: + { + AnchorNode* an = NANCHOR(node); + switch (an->type) { + case ANCHOR_PREC_READ: + case ANCHOR_PREC_READ_NOT: + case ANCHOR_LOOK_BEHIND: + case ANCHOR_LOOK_BEHIND_NOT: + r = subexp_inf_recursive_check(an->target, env, head); + break; + } + } + break; + + case NT_CALL: + r = subexp_inf_recursive_check(NCALL(node)->target, env, head); + break; + + case NT_ENCLOSE: + if (IS_ENCLOSE_MARK2(NENCLOSE(node))) + return 0; + else if (IS_ENCLOSE_MARK1(NENCLOSE(node))) + return (head == 0 ? RECURSION_EXIST : RECURSION_INFINITE); + else { + SET_ENCLOSE_STATUS(node, NST_MARK2); + r = subexp_inf_recursive_check(NENCLOSE(node)->target, env, head); + CLEAR_ENCLOSE_STATUS(node, NST_MARK2); + } + break; + + default: + break; + } + + return r; +} + +static int +subexp_inf_recursive_check_trav(Node* node, ScanEnv* env) +{ + int type; + int r = 0; + + type = NTYPE(node); + switch (type) { + case NT_LIST: + case NT_ALT: + do { + r = subexp_inf_recursive_check_trav(NCAR(node), env); + } while (r == 0 && IS_NOT_NULL(node = NCDR(node))); + break; + + case NT_QTFR: + r = subexp_inf_recursive_check_trav(NQTFR(node)->target, env); + break; + + case NT_ANCHOR: + { + AnchorNode* an = NANCHOR(node); + switch (an->type) { + case ANCHOR_PREC_READ: + case ANCHOR_PREC_READ_NOT: + case ANCHOR_LOOK_BEHIND: + case ANCHOR_LOOK_BEHIND_NOT: + r = subexp_inf_recursive_check_trav(an->target, env); + break; + } + } + break; + + case NT_ENCLOSE: + { + EncloseNode* en = NENCLOSE(node); + + if (IS_ENCLOSE_RECURSION(en)) { + SET_ENCLOSE_STATUS(node, NST_MARK1); + r = subexp_inf_recursive_check(en->target, env, 1); + if (r > 0) return ONIGERR_NEVER_ENDING_RECURSION; + CLEAR_ENCLOSE_STATUS(node, NST_MARK1); + } + r = subexp_inf_recursive_check_trav(en->target, env); + } + + break; + + default: + break; + } + + return r; +} + +static int +subexp_recursive_check(Node* node) +{ + int r = 0; + + switch (NTYPE(node)) { + case NT_LIST: + case NT_ALT: + do { + r |= subexp_recursive_check(NCAR(node)); + } while (IS_NOT_NULL(node = NCDR(node))); + break; + + case NT_QTFR: + r = subexp_recursive_check(NQTFR(node)->target); + break; + + case NT_ANCHOR: + { + AnchorNode* an = NANCHOR(node); + switch (an->type) { + case ANCHOR_PREC_READ: + case ANCHOR_PREC_READ_NOT: + case ANCHOR_LOOK_BEHIND: + case ANCHOR_LOOK_BEHIND_NOT: + r = subexp_recursive_check(an->target); + break; + } + } + break; + + case NT_CALL: + r = subexp_recursive_check(NCALL(node)->target); + if (r != 0) SET_CALL_RECURSION(node); + break; + + case NT_ENCLOSE: + if (IS_ENCLOSE_MARK2(NENCLOSE(node))) + return 0; + else if (IS_ENCLOSE_MARK1(NENCLOSE(node))) + return 1; /* recursion */ + else { + SET_ENCLOSE_STATUS(node, NST_MARK2); + r = subexp_recursive_check(NENCLOSE(node)->target); + CLEAR_ENCLOSE_STATUS(node, NST_MARK2); + } + break; + + default: + break; + } + + return r; +} + + +static int +subexp_recursive_check_trav(Node* node, ScanEnv* env) +{ +#define FOUND_CALLED_NODE 1 + + int type; + int r = 0; + + type = NTYPE(node); + switch (type) { + case NT_LIST: + case NT_ALT: + { + int ret; + do { + ret = subexp_recursive_check_trav(NCAR(node), env); + if (ret == FOUND_CALLED_NODE) r = FOUND_CALLED_NODE; + else if (ret < 0) return ret; + } while (IS_NOT_NULL(node = NCDR(node))); + } + break; + + case NT_QTFR: + r = subexp_recursive_check_trav(NQTFR(node)->target, env); + if (NQTFR(node)->upper == 0) { + if (r == FOUND_CALLED_NODE) + NQTFR(node)->is_refered = 1; + } + break; + + case NT_ANCHOR: + { + AnchorNode* an = NANCHOR(node); + switch (an->type) { + case ANCHOR_PREC_READ: + case ANCHOR_PREC_READ_NOT: + case ANCHOR_LOOK_BEHIND: + case ANCHOR_LOOK_BEHIND_NOT: + r = subexp_recursive_check_trav(an->target, env); + break; + } + } + break; + + case NT_ENCLOSE: + { + EncloseNode* en = NENCLOSE(node); + + if (! IS_ENCLOSE_RECURSION(en)) { + if (IS_ENCLOSE_CALLED(en)) { + SET_ENCLOSE_STATUS(node, NST_MARK1); + r = subexp_recursive_check(en->target); + if (r != 0) SET_ENCLOSE_STATUS(node, NST_RECURSION); + CLEAR_ENCLOSE_STATUS(node, NST_MARK1); + } + } + r = subexp_recursive_check_trav(en->target, env); + if (IS_ENCLOSE_CALLED(en)) + r |= FOUND_CALLED_NODE; + } + break; + + default: + break; + } + + return r; +} + +static int +setup_subexp_call(Node* node, ScanEnv* env) +{ + int type; + int r = 0; + + type = NTYPE(node); + switch (type) { + case NT_LIST: + do { + r = setup_subexp_call(NCAR(node), env); + } while (r == 0 && IS_NOT_NULL(node = NCDR(node))); + break; + + case NT_ALT: + do { + r = setup_subexp_call(NCAR(node), env); + } while (r == 0 && IS_NOT_NULL(node = NCDR(node))); + break; + + case NT_QTFR: + r = setup_subexp_call(NQTFR(node)->target, env); + break; + case NT_ENCLOSE: + r = setup_subexp_call(NENCLOSE(node)->target, env); + break; + + case NT_CALL: + { + CallNode* cn = NCALL(node); + Node** nodes = SCANENV_MEM_NODES(env); + + if (cn->group_num != 0) { + int gnum = cn->group_num; + +#ifdef USE_NAMED_GROUP + if (env->num_named > 0 && + IS_SYNTAX_BV(env->syntax, ONIG_SYN_CAPTURE_ONLY_NAMED_GROUP) && + !ONIG_IS_OPTION_ON(env->option, ONIG_OPTION_CAPTURE_GROUP)) { + return ONIGERR_NUMBERED_BACKREF_OR_CALL_NOT_ALLOWED; + } +#endif + if (gnum > env->num_mem) { + onig_scan_env_set_error_string(env, + ONIGERR_UNDEFINED_GROUP_REFERENCE, cn->name, cn->name_end); + return ONIGERR_UNDEFINED_GROUP_REFERENCE; + } + +#ifdef USE_NAMED_GROUP + set_call_attr: +#endif + cn->target = nodes[cn->group_num]; + if (IS_NULL(cn->target)) { + onig_scan_env_set_error_string(env, + ONIGERR_UNDEFINED_NAME_REFERENCE, cn->name, cn->name_end); + return ONIGERR_UNDEFINED_NAME_REFERENCE; + } + SET_ENCLOSE_STATUS(cn->target, NST_CALLED); + BIT_STATUS_ON_AT(env->bt_mem_start, cn->group_num); + cn->unset_addr_list = env->unset_addr_list; + } +#ifdef USE_NAMED_GROUP + else { + int *refs; + + int n = onig_name_to_group_numbers(env->reg, cn->name, cn->name_end, + &refs); + if (n <= 0) { + onig_scan_env_set_error_string(env, + ONIGERR_UNDEFINED_NAME_REFERENCE, cn->name, cn->name_end); + return ONIGERR_UNDEFINED_NAME_REFERENCE; + } + else if (n > 1) { + onig_scan_env_set_error_string(env, + ONIGERR_MULTIPLEX_DEFINITION_NAME_CALL, cn->name, cn->name_end); + return ONIGERR_MULTIPLEX_DEFINITION_NAME_CALL; + } + else { + cn->group_num = refs[0]; + goto set_call_attr; + } + } +#endif + } + break; + + case NT_ANCHOR: + { + AnchorNode* an = NANCHOR(node); + + switch (an->type) { + case ANCHOR_PREC_READ: + case ANCHOR_PREC_READ_NOT: + case ANCHOR_LOOK_BEHIND: + case ANCHOR_LOOK_BEHIND_NOT: + r = setup_subexp_call(an->target, env); + break; + } + } + break; + + default: + break; + } + + return r; +} +#endif + +/* divide different length alternatives in look-behind. + (?<=A|B) ==> (?<=A)|(?<=B) + (?<!A|B) ==> (?<!A)(?<!B) +*/ +static int +divide_look_behind_alternatives(Node* node) +{ + Node *head, *np, *insert_node; + AnchorNode* an = NANCHOR(node); + int anc_type = an->type; + + head = an->target; + np = NCAR(head); + swap_node(node, head); + NCAR(node) = head; + NANCHOR(head)->target = np; + + np = node; + while ((np = NCDR(np)) != NULL_NODE) { + insert_node = onig_node_new_anchor(anc_type); + CHECK_NULL_RETURN_MEMERR(insert_node); + NANCHOR(insert_node)->target = NCAR(np); + NCAR(np) = insert_node; + } + + if (anc_type == ANCHOR_LOOK_BEHIND_NOT) { + np = node; + do { + SET_NTYPE(np, NT_LIST); /* alt -> list */ + } while ((np = NCDR(np)) != NULL_NODE); + } + return 0; +} + +static int +setup_look_behind(Node* node, regex_t* reg, ScanEnv* env) +{ + int r, len; + AnchorNode* an = NANCHOR(node); + + r = get_char_length_tree(an->target, reg, &len); + if (r == 0) + an->char_len = len; + else if (r == GET_CHAR_LEN_VARLEN) + r = ONIGERR_INVALID_LOOK_BEHIND_PATTERN; + else if (r == GET_CHAR_LEN_TOP_ALT_VARLEN) { + if (IS_SYNTAX_BV(env->syntax, ONIG_SYN_DIFFERENT_LEN_ALT_LOOK_BEHIND)) + r = divide_look_behind_alternatives(node); + else + r = ONIGERR_INVALID_LOOK_BEHIND_PATTERN; + } + + return r; +} + +static int +next_setup(Node* node, Node* next_node, regex_t* reg) +{ + int type; + + retry: + type = NTYPE(node); + if (type == NT_QTFR) { + QtfrNode* qn = NQTFR(node); + if (qn->greedy && IS_REPEAT_INFINITE(qn->upper)) { +#ifdef USE_QTFR_PEEK_NEXT + Node* n = get_head_value_node(next_node, 1, reg); + /* '\0': for UTF-16BE etc... */ + if (IS_NOT_NULL(n) && NSTR(n)->s[0] != '\0') { + qn->next_head_exact = n; + } +#endif + /* automatic posseivation a*b ==> (?>a*)b */ + if (qn->lower <= 1) { + int ttype = NTYPE(qn->target); + if (IS_NODE_TYPE_SIMPLE(ttype)) { + Node *x, *y; + x = get_head_value_node(qn->target, 0, reg); + if (IS_NOT_NULL(x)) { + y = get_head_value_node(next_node, 0, reg); + if (IS_NOT_NULL(y) && is_not_included(x, y, reg)) { + Node* en = onig_node_new_enclose(ENCLOSE_STOP_BACKTRACK); + CHECK_NULL_RETURN_MEMERR(en); + SET_ENCLOSE_STATUS(en, NST_STOP_BT_SIMPLE_REPEAT); + swap_node(node, en); + NENCLOSE(node)->target = en; + } + } + } + } + } + } + else if (type == NT_ENCLOSE) { + EncloseNode* en = NENCLOSE(node); + if (en->type == ENCLOSE_MEMORY) { + node = en->target; + goto retry; + } + } + return 0; +} + + +static int +update_string_node_case_fold(regex_t* reg, Node *node) +{ + UChar *p, *q, *end, buf[ONIGENC_MBC_CASE_FOLD_MAXLEN]; + UChar *sbuf, *ebuf, *sp; + int r, i, len, sbuf_size; + StrNode* sn = NSTR(node); + + end = sn->end; + sbuf_size = (end - sn->s) * 2; + sbuf = (UChar* )xmalloc(sbuf_size); + CHECK_NULL_RETURN_MEMERR(sbuf); + ebuf = sbuf + sbuf_size; + + sp = sbuf; + p = sn->s; + while (p < end) { + len = ONIGENC_MBC_CASE_FOLD(reg->enc, reg->case_fold_flag, &p, end, buf); + q = buf; + for (i = 0; i < len; i++) { + if (sp >= ebuf) { + sbuf = (UChar* )xrealloc(sbuf, sbuf_size * 2); + CHECK_NULL_RETURN_MEMERR(sbuf); + sp = sbuf + sbuf_size; + sbuf_size *= 2; + ebuf = sbuf + sbuf_size; + } + + *sp++ = buf[i]; + } + } + + r = onig_node_str_set(node, sbuf, sp); + if (r != 0) { + xfree(sbuf); + return r; + } + + xfree(sbuf); + return 0; +} + +static int +expand_case_fold_make_rem_string(Node** rnode, UChar *s, UChar *end, + regex_t* reg) +{ + int r; + Node *node; + + node = onig_node_new_str(s, end); + if (IS_NULL(node)) return ONIGERR_MEMORY; + + r = update_string_node_case_fold(reg, node); + if (r != 0) { + onig_node_free(node); + return r; + } + + NSTRING_SET_AMBIG(node); + NSTRING_SET_DONT_GET_OPT_INFO(node); + *rnode = node; + return 0; +} + +static int +expand_case_fold_string_alt(int item_num, OnigCaseFoldCodeItem items[], + UChar *p, int slen, UChar *end, + regex_t* reg, Node **rnode) +{ + int r, i, j, len, varlen; + Node *anode, *var_anode, *snode, *xnode, *an; + UChar buf[ONIGENC_CODE_TO_MBC_MAXLEN]; + + *rnode = var_anode = NULL_NODE; + + varlen = 0; + for (i = 0; i < item_num; i++) { + if (items[i].byte_len != slen) { + varlen = 1; + break; + } + } + + if (varlen != 0) { + *rnode = var_anode = onig_node_new_alt(NULL_NODE, NULL_NODE); + if (IS_NULL(var_anode)) return ONIGERR_MEMORY; + + xnode = onig_node_new_list(NULL, NULL); + if (IS_NULL(xnode)) goto mem_err; + NCAR(var_anode) = xnode; + + anode = onig_node_new_alt(NULL_NODE, NULL_NODE); + if (IS_NULL(anode)) goto mem_err; + NCAR(xnode) = anode; + } + else { + *rnode = anode = onig_node_new_alt(NULL_NODE, NULL_NODE); + if (IS_NULL(anode)) return ONIGERR_MEMORY; + } + + snode = onig_node_new_str(p, p + slen); + if (IS_NULL(snode)) goto mem_err; + + NCAR(anode) = snode; + + for (i = 0; i < item_num; i++) { + snode = onig_node_new_str(NULL, NULL); + if (IS_NULL(snode)) goto mem_err; + + for (j = 0; j < items[i].code_len; j++) { + len = ONIGENC_CODE_TO_MBC(reg->enc, items[i].code[j], buf); + if (len < 0) { + r = len; + goto mem_err2; + } + + r = onig_node_str_cat(snode, buf, buf + len); + if (r != 0) goto mem_err2; + } + + an = onig_node_new_alt(NULL_NODE, NULL_NODE); + if (IS_NULL(an)) { + goto mem_err2; + } + + if (items[i].byte_len != slen) { + Node *rem; + UChar *q = p + items[i].byte_len; + + if (q < end) { + r = expand_case_fold_make_rem_string(&rem, q, end, reg); + if (r != 0) { + onig_node_free(an); + goto mem_err2; + } + + xnode = onig_node_list_add(NULL_NODE, snode); + if (IS_NULL(xnode)) { + onig_node_free(an); + onig_node_free(rem); + goto mem_err2; + } + if (IS_NULL(onig_node_list_add(xnode, rem))) { + onig_node_free(an); + onig_node_free(xnode); + onig_node_free(rem); + goto mem_err; + } + + NCAR(an) = xnode; + } + else { + NCAR(an) = snode; + } + + NCDR(var_anode) = an; + var_anode = an; + } + else { + NCAR(an) = snode; + NCDR(anode) = an; + anode = an; + } + } + + return varlen; + + mem_err2: + onig_node_free(snode); + + mem_err: + onig_node_free(*rnode); + + return ONIGERR_MEMORY; +} + +static int +expand_case_fold_string(Node* node, regex_t* reg) +{ +#define THRESHOLD_CASE_FOLD_ALT_FOR_EXPANSION 8 + + int r, n, len, alt_num; + UChar *start, *end, *p; + Node *top_root, *root, *snode, *prev_node; + OnigCaseFoldCodeItem items[ONIGENC_GET_CASE_FOLD_CODES_MAX_NUM]; + StrNode* sn = NSTR(node); + + if (NSTRING_IS_AMBIG(node)) return 0; + + start = sn->s; + end = sn->end; + if (start >= end) return 0; + + r = 0; + top_root = root = prev_node = snode = NULL_NODE; + alt_num = 1; + p = start; + while (p < end) { + n = ONIGENC_GET_CASE_FOLD_CODES_BY_STR(reg->enc, reg->case_fold_flag, + p, end, items); + if (n < 0) { + r = n; + goto err; + } + + len = enclen(reg->enc, p, end); + + if (n == 0) { + if (IS_NULL(snode)) { + if (IS_NULL(root) && IS_NOT_NULL(prev_node)) { + top_root = root = onig_node_list_add(NULL_NODE, prev_node); + if (IS_NULL(root)) { + onig_node_free(prev_node); + goto mem_err; + } + } + + prev_node = snode = onig_node_new_str(NULL, NULL); + if (IS_NULL(snode)) goto mem_err; + if (IS_NOT_NULL(root)) { + if (IS_NULL(onig_node_list_add(root, snode))) { + onig_node_free(snode); + goto mem_err; + } + } + } + + r = onig_node_str_cat(snode, p, p + len); + if (r != 0) goto err; + } + else { + alt_num *= (n + 1); + if (alt_num > THRESHOLD_CASE_FOLD_ALT_FOR_EXPANSION) break; + + if (IS_NULL(root) && IS_NOT_NULL(prev_node)) { + top_root = root = onig_node_list_add(NULL_NODE, prev_node); + if (IS_NULL(root)) { + onig_node_free(prev_node); + goto mem_err; + } + } + + r = expand_case_fold_string_alt(n, items, p, len, end, reg, &prev_node); + if (r < 0) goto mem_err; + if (r == 1) { + if (IS_NULL(root)) { + top_root = prev_node; + } + else { + if (IS_NULL(onig_node_list_add(root, prev_node))) { + onig_node_free(prev_node); + goto mem_err; + } + } + + root = NCAR(prev_node); + } + else { /* r == 0 */ + if (IS_NOT_NULL(root)) { + if (IS_NULL(onig_node_list_add(root, prev_node))) { + onig_node_free(prev_node); + goto mem_err; + } + } + } + + snode = NULL_NODE; + } + + p += len; + } + + if (p < end) { + Node *srem; + + r = expand_case_fold_make_rem_string(&srem, p, end, reg); + if (r != 0) goto mem_err; + + if (IS_NOT_NULL(prev_node) && IS_NULL(root)) { + top_root = root = onig_node_list_add(NULL_NODE, prev_node); + if (IS_NULL(root)) { + onig_node_free(srem); + onig_node_free(prev_node); + goto mem_err; + } + } + + if (IS_NULL(root)) { + prev_node = srem; + } + else { + if (IS_NULL(onig_node_list_add(root, srem))) { + onig_node_free(srem); + goto mem_err; + } + } + } + + /* ending */ + top_root = (IS_NOT_NULL(top_root) ? top_root : prev_node); + swap_node(node, top_root); + onig_node_free(top_root); + return 0; + + mem_err: + r = ONIGERR_MEMORY; + + err: + onig_node_free(top_root); + return r; +} + + +#ifdef USE_COMBINATION_EXPLOSION_CHECK + +#define CEC_THRES_NUM_BIG_REPEAT 512 +#define CEC_INFINITE_NUM 0x7fffffff + +#define CEC_IN_INFINITE_REPEAT (1<<0) +#define CEC_IN_FINITE_REPEAT (1<<1) +#define CEC_CONT_BIG_REPEAT (1<<2) + +static int +setup_comb_exp_check(Node* node, int state, ScanEnv* env) +{ + int type; + int r = state; + + type = NTYPE(node); + switch (type) { + case NT_LIST: + { + Node* prev = NULL_NODE; + do { + r = setup_comb_exp_check(NCAR(node), r, env); + prev = NCAR(node); + } while (r >= 0 && IS_NOT_NULL(node = NCDR(node))); + } + break; + + case NT_ALT: + { + int ret; + do { + ret = setup_comb_exp_check(NCAR(node), state, env); + r |= ret; + } while (ret >= 0 && IS_NOT_NULL(node = NCDR(node))); + } + break; + + case NT_QTFR: + { + int child_state = state; + int add_state = 0; + QtfrNode* qn = NQTFR(node); + Node* target = qn->target; + int var_num; + + if (! IS_REPEAT_INFINITE(qn->upper)) { + if (qn->upper > 1) { + /* {0,1}, {1,1} are allowed */ + child_state |= CEC_IN_FINITE_REPEAT; + + /* check (a*){n,m}, (a+){n,m} => (a*){n,n}, (a+){n,n} */ + if (env->backrefed_mem == 0) { + if (NTYPE(qn->target) == NT_ENCLOSE) { + EncloseNode* en = NENCLOSE(qn->target); + if (en->type == ENCLOSE_MEMORY) { + if (NTYPE(en->target) == NT_QTFR) { + QtfrNode* q = NQTFR(en->target); + if (IS_REPEAT_INFINITE(q->upper) + && q->greedy == qn->greedy) { + qn->upper = (qn->lower == 0 ? 1 : qn->lower); + if (qn->upper == 1) + child_state = state; + } + } + } + } + } + } + } + + if (state & CEC_IN_FINITE_REPEAT) { + qn->comb_exp_check_num = -1; + } + else { + if (IS_REPEAT_INFINITE(qn->upper)) { + var_num = CEC_INFINITE_NUM; + child_state |= CEC_IN_INFINITE_REPEAT; + } + else { + var_num = qn->upper - qn->lower; + } + + if (var_num >= CEC_THRES_NUM_BIG_REPEAT) + add_state |= CEC_CONT_BIG_REPEAT; + + if (((state & CEC_IN_INFINITE_REPEAT) != 0 && var_num != 0) || + ((state & CEC_CONT_BIG_REPEAT) != 0 && + var_num >= CEC_THRES_NUM_BIG_REPEAT)) { + if (qn->comb_exp_check_num == 0) { + env->num_comb_exp_check++; + qn->comb_exp_check_num = env->num_comb_exp_check; + if (env->curr_max_regnum > env->comb_exp_max_regnum) + env->comb_exp_max_regnum = env->curr_max_regnum; + } + } + } + + r = setup_comb_exp_check(target, child_state, env); + r |= add_state; + } + break; + + case NT_ENCLOSE: + { + EncloseNode* en = NENCLOSE(node); + + switch (en->type) { + case ENCLOSE_MEMORY: + { + if (env->curr_max_regnum < en->regnum) + env->curr_max_regnum = en->regnum; + + r = setup_comb_exp_check(en->target, state, env); + } + break; + + default: + r = setup_comb_exp_check(en->target, state, env); + break; + } + } + break; + +#ifdef USE_SUBEXP_CALL + case NT_CALL: + if (IS_CALL_RECURSION(NCALL(node))) + env->has_recursion = 1; + else + r = setup_comb_exp_check(NCALL(node)->target, state, env); + break; +#endif + + default: + break; + } + + return r; +} +#endif + +#define IN_ALT (1<<0) +#define IN_NOT (1<<1) +#define IN_REPEAT (1<<2) +#define IN_VAR_REPEAT (1<<3) + +/* setup_tree does the following work. + 1. check empty loop. (set qn->target_empty_info) + 2. expand ignore-case in char class. + 3. set memory status bit flags. (reg->mem_stats) + 4. set qn->head_exact for [push, exact] -> [push_or_jump_exact1, exact]. + 5. find invalid patterns in look-behind. + 6. expand repeated string. + */ +static int +setup_tree(Node* node, regex_t* reg, int state, ScanEnv* env) +{ + int type; + int r = 0; + + type = NTYPE(node); + switch (type) { + case NT_LIST: + { + Node* prev = NULL_NODE; + do { + r = setup_tree(NCAR(node), reg, state, env); + if (IS_NOT_NULL(prev) && r == 0) { + r = next_setup(prev, NCAR(node), reg); + } + prev = NCAR(node); + } while (r == 0 && IS_NOT_NULL(node = NCDR(node))); + } + break; + + case NT_ALT: + do { + r = setup_tree(NCAR(node), reg, (state | IN_ALT), env); + } while (r == 0 && IS_NOT_NULL(node = NCDR(node))); + break; + + case NT_CCLASS: + break; + + case NT_STR: + if (IS_IGNORECASE(reg->options) && !NSTRING_IS_RAW(node)) { + r = expand_case_fold_string(node, reg); + } + break; + + case NT_CTYPE: + case NT_CANY: + break; + +#ifdef USE_SUBEXP_CALL + case NT_CALL: + break; +#endif + + case NT_BREF: + { + int i; + int* p; + Node** nodes = SCANENV_MEM_NODES(env); + BRefNode* br = NBREF(node); + p = BACKREFS_P(br); + for (i = 0; i < br->back_num; i++) { + if (p[i] > env->num_mem) return ONIGERR_INVALID_BACKREF; + BIT_STATUS_ON_AT(env->backrefed_mem, p[i]); + BIT_STATUS_ON_AT(env->bt_mem_start, p[i]); +#ifdef USE_BACKREF_WITH_LEVEL + if (IS_BACKREF_NEST_LEVEL(br)) { + BIT_STATUS_ON_AT(env->bt_mem_end, p[i]); + } +#endif + SET_ENCLOSE_STATUS(nodes[p[i]], NST_MEM_BACKREFED); + } + } + break; + + case NT_QTFR: + { + OnigDistance d; + QtfrNode* qn = NQTFR(node); + Node* target = qn->target; + + if ((state & IN_REPEAT) != 0) { + qn->state |= NST_IN_REPEAT; + } + + if (IS_REPEAT_INFINITE(qn->upper) || qn->upper >= 1) { + r = get_min_match_length(target, &d, env); + if (r) break; + if (d == 0) { + qn->target_empty_info = NQ_TARGET_IS_EMPTY; +#ifdef USE_MONOMANIAC_CHECK_CAPTURES_IN_ENDLESS_REPEAT + r = quantifiers_memory_node_info(target); + if (r < 0) break; + if (r > 0) { + qn->target_empty_info = r; + } +#endif +#if 0 + r = get_max_match_length(target, &d, env); + if (r == 0 && d == 0) { + /* ()* ==> ()?, ()+ ==> () */ + qn->upper = 1; + if (qn->lower > 1) qn->lower = 1; + if (NTYPE(target) == NT_STR) { + qn->upper = qn->lower = 0; /* /(?:)+/ ==> // */ + } + } +#endif + } + } + + state |= IN_REPEAT; + if (qn->lower != qn->upper) + state |= IN_VAR_REPEAT; + r = setup_tree(target, reg, state, env); + if (r) break; + + /* expand string */ +#define EXPAND_STRING_MAX_LENGTH 100 + if (NTYPE(target) == NT_STR) { + if (!IS_REPEAT_INFINITE(qn->lower) && qn->lower == qn->upper && + qn->lower > 1 && qn->lower <= EXPAND_STRING_MAX_LENGTH) { + int len = NSTRING_LEN(target); + StrNode* sn = NSTR(target); + + if (len * qn->lower <= EXPAND_STRING_MAX_LENGTH) { + int i, n = qn->lower; + onig_node_conv_to_str_node(node, NSTR(target)->flag); + for (i = 0; i < n; i++) { + r = onig_node_str_cat(node, sn->s, sn->end); + if (r) break; + } + onig_node_free(target); + break; /* break case NT_QTFR: */ + } + } + } + +#ifdef USE_OP_PUSH_OR_JUMP_EXACT + if (qn->greedy && (qn->target_empty_info != 0)) { + if (NTYPE(target) == NT_QTFR) { + QtfrNode* tqn = NQTFR(target); + if (IS_NOT_NULL(tqn->head_exact)) { + qn->head_exact = tqn->head_exact; + tqn->head_exact = NULL; + } + } + else { + qn->head_exact = get_head_value_node(qn->target, 1, reg); + } + } +#endif + } + break; + + case NT_ENCLOSE: + { + EncloseNode* en = NENCLOSE(node); + + switch (en->type) { + case ENCLOSE_OPTION: + { + OnigOptionType options = reg->options; + reg->options = NENCLOSE(node)->option; + r = setup_tree(NENCLOSE(node)->target, reg, state, env); + reg->options = options; + } + break; + + case ENCLOSE_MEMORY: + if ((state & (IN_ALT | IN_NOT | IN_VAR_REPEAT)) != 0) { + BIT_STATUS_ON_AT(env->bt_mem_start, en->regnum); + /* SET_ENCLOSE_STATUS(node, NST_MEM_IN_ALT_NOT); */ + } + r = setup_tree(en->target, reg, state, env); + break; + + case ENCLOSE_STOP_BACKTRACK: + { + Node* target = en->target; + r = setup_tree(target, reg, state, env); + if (NTYPE(target) == NT_QTFR) { + QtfrNode* tqn = NQTFR(target); + if (IS_REPEAT_INFINITE(tqn->upper) && tqn->lower <= 1 && + tqn->greedy != 0) { /* (?>a*), a*+ etc... */ + int qtype = NTYPE(tqn->target); + if (IS_NODE_TYPE_SIMPLE(qtype)) + SET_ENCLOSE_STATUS(node, NST_STOP_BT_SIMPLE_REPEAT); + } + } + } + break; + } + } + break; + + case NT_ANCHOR: + { + AnchorNode* an = NANCHOR(node); + + switch (an->type) { + case ANCHOR_PREC_READ: + r = setup_tree(an->target, reg, state, env); + break; + case ANCHOR_PREC_READ_NOT: + r = setup_tree(an->target, reg, (state | IN_NOT), env); + break; + +/* allowed node types in look-behind */ +#define ALLOWED_TYPE_IN_LB \ + ( BIT_NT_LIST | BIT_NT_ALT | BIT_NT_STR | BIT_NT_CCLASS | BIT_NT_CTYPE | \ + BIT_NT_CANY | BIT_NT_ANCHOR | BIT_NT_ENCLOSE | BIT_NT_QTFR | BIT_NT_CALL ) + +#define ALLOWED_ENCLOSE_IN_LB ( ENCLOSE_MEMORY ) +#define ALLOWED_ENCLOSE_IN_LB_NOT 0 + +#define ALLOWED_ANCHOR_IN_LB \ +( ANCHOR_LOOK_BEHIND | ANCHOR_BEGIN_LINE | ANCHOR_END_LINE | ANCHOR_BEGIN_BUF | ANCHOR_BEGIN_POSITION ) +#define ALLOWED_ANCHOR_IN_LB_NOT \ +( ANCHOR_LOOK_BEHIND | ANCHOR_LOOK_BEHIND_NOT | ANCHOR_BEGIN_LINE | ANCHOR_END_LINE | ANCHOR_BEGIN_BUF | ANCHOR_BEGIN_POSITION ) + + case ANCHOR_LOOK_BEHIND: + { + r = check_type_tree(an->target, ALLOWED_TYPE_IN_LB, + ALLOWED_ENCLOSE_IN_LB, ALLOWED_ANCHOR_IN_LB); + if (r < 0) return r; + if (r > 0) return ONIGERR_INVALID_LOOK_BEHIND_PATTERN; + r = setup_look_behind(node, reg, env); + if (r != 0) return r; + r = setup_tree(an->target, reg, state, env); + } + break; + + case ANCHOR_LOOK_BEHIND_NOT: + { + r = check_type_tree(an->target, ALLOWED_TYPE_IN_LB, + ALLOWED_ENCLOSE_IN_LB_NOT, ALLOWED_ANCHOR_IN_LB_NOT); + if (r < 0) return r; + if (r > 0) return ONIGERR_INVALID_LOOK_BEHIND_PATTERN; + r = setup_look_behind(node, reg, env); + if (r != 0) return r; + r = setup_tree(an->target, reg, (state | IN_NOT), env); + } + break; + } + } + break; + + default: + break; + } + + return r; +} + +/* set skip map for Boyer-Moor search */ +static int +set_bm_skip(UChar* s, UChar* end, OnigEncoding enc ARG_UNUSED, + UChar skip[], int** int_skip) +{ + int i, len; + + len = end - s; + if (len < ONIG_CHAR_TABLE_SIZE) { + for (i = 0; i < ONIG_CHAR_TABLE_SIZE; i++) skip[i] = len; + + for (i = 0; i < len - 1; i++) + skip[s[i]] = len - 1 - i; + } + else { + if (IS_NULL(*int_skip)) { + *int_skip = (int* )xmalloc(sizeof(int) * ONIG_CHAR_TABLE_SIZE); + if (IS_NULL(*int_skip)) return ONIGERR_MEMORY; + } + for (i = 0; i < ONIG_CHAR_TABLE_SIZE; i++) (*int_skip)[i] = len; + + for (i = 0; i < len - 1; i++) + (*int_skip)[s[i]] = len - 1 - i; + } + return 0; +} + +#define OPT_EXACT_MAXLEN 24 + +typedef struct { + OnigDistance min; /* min byte length */ + OnigDistance max; /* max byte length */ +} MinMaxLen; + +typedef struct { + MinMaxLen mmd; + OnigEncoding enc; + OnigOptionType options; + OnigCaseFoldType case_fold_flag; + ScanEnv* scan_env; +} OptEnv; + +typedef struct { + int left_anchor; + int right_anchor; +} OptAncInfo; + +typedef struct { + MinMaxLen mmd; /* info position */ + OptAncInfo anc; + + int reach_end; + int ignore_case; + int len; + UChar s[OPT_EXACT_MAXLEN]; +} OptExactInfo; + +typedef struct { + MinMaxLen mmd; /* info position */ + OptAncInfo anc; + + int value; /* weighted value */ + UChar map[ONIG_CHAR_TABLE_SIZE]; +} OptMapInfo; + +typedef struct { + MinMaxLen len; + + OptAncInfo anc; + OptExactInfo exb; /* boundary */ + OptExactInfo exm; /* middle */ + OptExactInfo expr; /* prec read (?=...) */ + + OptMapInfo map; /* boundary */ +} NodeOptInfo; + + +static int +map_position_value(OnigEncoding enc, int i) +{ + static const short int ByteValTable[] = { + 5, 1, 1, 1, 1, 1, 1, 1, 1, 10, 10, 1, 1, 10, 1, 1, + 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, + 12, 4, 7, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 5, 5, 5, + 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, + 5, 6, 6, 6, 6, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, + 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 6, 5, 5, 5, + 5, 6, 6, 6, 6, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, + 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1 + }; + + if (i < (int )(sizeof(ByteValTable)/sizeof(ByteValTable[0]))) { + if (i == 0 && ONIGENC_MBC_MINLEN(enc) > 1) + return 20; + else + return (int )ByteValTable[i]; + } + else + return 4; /* Take it easy. */ +} + +static int +distance_value(MinMaxLen* mm) +{ + /* 1000 / (min-max-dist + 1) */ + static const short int dist_vals[] = { + 1000, 500, 333, 250, 200, 167, 143, 125, 111, 100, + 91, 83, 77, 71, 67, 63, 59, 56, 53, 50, + 48, 45, 43, 42, 40, 38, 37, 36, 34, 33, + 32, 31, 30, 29, 29, 28, 27, 26, 26, 25, + 24, 24, 23, 23, 22, 22, 21, 21, 20, 20, + 20, 19, 19, 19, 18, 18, 18, 17, 17, 17, + 16, 16, 16, 16, 15, 15, 15, 15, 14, 14, + 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, + 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, + 11, 11, 11, 11, 11, 10, 10, 10, 10, 10 + }; + + int d; + + if (mm->max == ONIG_INFINITE_DISTANCE) return 0; + + d = mm->max - mm->min; + if (d < (int )(sizeof(dist_vals)/sizeof(dist_vals[0]))) + /* return dist_vals[d] * 16 / (mm->min + 12); */ + return (int )dist_vals[d]; + else + return 1; +} + +static int +comp_distance_value(MinMaxLen* d1, MinMaxLen* d2, int v1, int v2) +{ + if (v2 <= 0) return -1; + if (v1 <= 0) return 1; + + v1 *= distance_value(d1); + v2 *= distance_value(d2); + + if (v2 > v1) return 1; + if (v2 < v1) return -1; + + if (d2->min < d1->min) return 1; + if (d2->min > d1->min) return -1; + return 0; +} + +static int +is_equal_mml(MinMaxLen* a, MinMaxLen* b) +{ + return (a->min == b->min && a->max == b->max) ? 1 : 0; +} + + +static void +set_mml(MinMaxLen* mml, OnigDistance min, OnigDistance max) +{ + mml->min = min; + mml->max = max; +} + +static void +clear_mml(MinMaxLen* mml) +{ + mml->min = mml->max = 0; +} + +static void +copy_mml(MinMaxLen* to, MinMaxLen* from) +{ + to->min = from->min; + to->max = from->max; +} + +static void +add_mml(MinMaxLen* to, MinMaxLen* from) +{ + to->min = distance_add(to->min, from->min); + to->max = distance_add(to->max, from->max); +} + +#if 0 +static void +add_len_mml(MinMaxLen* to, OnigDistance len) +{ + to->min = distance_add(to->min, len); + to->max = distance_add(to->max, len); +} +#endif + +static void +alt_merge_mml(MinMaxLen* to, MinMaxLen* from) +{ + if (to->min > from->min) to->min = from->min; + if (to->max < from->max) to->max = from->max; +} + +static void +copy_opt_env(OptEnv* to, OptEnv* from) +{ + *to = *from; +} + +static void +clear_opt_anc_info(OptAncInfo* anc) +{ + anc->left_anchor = 0; + anc->right_anchor = 0; +} + +static void +copy_opt_anc_info(OptAncInfo* to, OptAncInfo* from) +{ + *to = *from; +} + +static void +concat_opt_anc_info(OptAncInfo* to, OptAncInfo* left, OptAncInfo* right, + OnigDistance left_len, OnigDistance right_len) +{ + clear_opt_anc_info(to); + + to->left_anchor = left->left_anchor; + if (left_len == 0) { + to->left_anchor |= right->left_anchor; + } + + to->right_anchor = right->right_anchor; + if (right_len == 0) { + to->right_anchor |= left->right_anchor; + } +} + +static int +is_left_anchor(int anc) +{ + if (anc == ANCHOR_END_BUF || anc == ANCHOR_SEMI_END_BUF || + anc == ANCHOR_END_LINE || anc == ANCHOR_PREC_READ || + anc == ANCHOR_PREC_READ_NOT) + return 0; + + return 1; +} + +static int +is_set_opt_anc_info(OptAncInfo* to, int anc) +{ + if ((to->left_anchor & anc) != 0) return 1; + + return ((to->right_anchor & anc) != 0 ? 1 : 0); +} + +static void +add_opt_anc_info(OptAncInfo* to, int anc) +{ + if (is_left_anchor(anc)) + to->left_anchor |= anc; + else + to->right_anchor |= anc; +} + +static void +remove_opt_anc_info(OptAncInfo* to, int anc) +{ + if (is_left_anchor(anc)) + to->left_anchor &= ~anc; + else + to->right_anchor &= ~anc; +} + +static void +alt_merge_opt_anc_info(OptAncInfo* to, OptAncInfo* add) +{ + to->left_anchor &= add->left_anchor; + to->right_anchor &= add->right_anchor; +} + +static int +is_full_opt_exact_info(OptExactInfo* ex) +{ + return (ex->len >= OPT_EXACT_MAXLEN ? 1 : 0); +} + +static void +clear_opt_exact_info(OptExactInfo* ex) +{ + clear_mml(&ex->mmd); + clear_opt_anc_info(&ex->anc); + ex->reach_end = 0; + ex->ignore_case = 0; + ex->len = 0; + ex->s[0] = '\0'; +} + +static void +copy_opt_exact_info(OptExactInfo* to, OptExactInfo* from) +{ + *to = *from; +} + +static void +concat_opt_exact_info(OptExactInfo* to, OptExactInfo* add, OnigEncoding enc) +{ + int i, j, len; + UChar *p, *end; + OptAncInfo tanc; + + if (! to->ignore_case && add->ignore_case) { + if (to->len >= add->len) return ; /* avoid */ + + to->ignore_case = 1; + } + + p = add->s; + end = p + add->len; + for (i = to->len; p < end; ) { + len = enclen(enc, p, end); + if (i + len > OPT_EXACT_MAXLEN) break; + for (j = 0; j < len && p < end; j++) + to->s[i++] = *p++; + } + + to->len = i; + to->reach_end = (p == end ? add->reach_end : 0); + + concat_opt_anc_info(&tanc, &to->anc, &add->anc, 1, 1); + if (! to->reach_end) tanc.right_anchor = 0; + copy_opt_anc_info(&to->anc, &tanc); +} + +static void +concat_opt_exact_info_str(OptExactInfo* to, UChar* s, UChar* end, + int raw ARG_UNUSED, OnigEncoding enc) +{ + int i, j, len; + UChar *p; + + for (i = to->len, p = s; p < end && i < OPT_EXACT_MAXLEN; ) { + len = enclen(enc, p, end); + if (i + len > OPT_EXACT_MAXLEN) break; + for (j = 0; j < len && p < end; j++) + to->s[i++] = *p++; + } + + to->len = i; +} + +static void +alt_merge_opt_exact_info(OptExactInfo* to, OptExactInfo* add, OptEnv* env) +{ + int i, j, len; + + if (add->len == 0 || to->len == 0) { + clear_opt_exact_info(to); + return ; + } + + if (! is_equal_mml(&to->mmd, &add->mmd)) { + clear_opt_exact_info(to); + return ; + } + + for (i = 0; i < to->len && i < add->len; ) { + if (to->s[i] != add->s[i]) break; + len = enclen(env->enc, to->s + i, to->s + to->len); + + for (j = 1; j < len; j++) { + if (to->s[i+j] != add->s[i+j]) break; + } + if (j < len) break; + i += len; + } + + if (! add->reach_end || i < add->len || i < to->len) { + to->reach_end = 0; + } + to->len = i; + to->ignore_case |= add->ignore_case; + + alt_merge_opt_anc_info(&to->anc, &add->anc); + if (! to->reach_end) to->anc.right_anchor = 0; +} + +static void +select_opt_exact_info(OnigEncoding enc, OptExactInfo* now, OptExactInfo* alt) +{ + int v1, v2; + + v1 = now->len; + v2 = alt->len; + + if (v2 == 0) { + return ; + } + else if (v1 == 0) { + copy_opt_exact_info(now, alt); + return ; + } + else if (v1 <= 2 && v2 <= 2) { + /* ByteValTable[x] is big value --> low price */ + v2 = map_position_value(enc, now->s[0]); + v1 = map_position_value(enc, alt->s[0]); + + if (now->len > 1) v1 += 5; + if (alt->len > 1) v2 += 5; + } + + if (now->ignore_case == 0) v1 *= 2; + if (alt->ignore_case == 0) v2 *= 2; + + if (comp_distance_value(&now->mmd, &alt->mmd, v1, v2) > 0) + copy_opt_exact_info(now, alt); +} + +static void +clear_opt_map_info(OptMapInfo* map) +{ + static const OptMapInfo clean_info = { + {0, 0}, {0, 0}, 0, + { + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 + } + }; + + xmemcpy(map, &clean_info, sizeof(OptMapInfo)); +} + +static void +copy_opt_map_info(OptMapInfo* to, OptMapInfo* from) +{ + *to = *from; +} + +static void +add_char_opt_map_info(OptMapInfo* map, UChar c, OnigEncoding enc) +{ + if (map->map[c] == 0) { + map->map[c] = 1; + map->value += map_position_value(enc, c); + } +} + +static int +add_char_amb_opt_map_info(OptMapInfo* map, UChar* p, UChar* end, + OnigEncoding enc, OnigCaseFoldType case_fold_flag) +{ + OnigCaseFoldCodeItem items[ONIGENC_GET_CASE_FOLD_CODES_MAX_NUM]; + UChar buf[ONIGENC_CODE_TO_MBC_MAXLEN]; + int i, n; + + add_char_opt_map_info(map, p[0], enc); + + case_fold_flag = DISABLE_CASE_FOLD_MULTI_CHAR(case_fold_flag); + n = ONIGENC_GET_CASE_FOLD_CODES_BY_STR(enc, case_fold_flag, p, end, items); + if (n < 0) return n; + + for (i = 0; i < n; i++) { + ONIGENC_CODE_TO_MBC(enc, items[i].code[0], buf); + add_char_opt_map_info(map, buf[0], enc); + } + + return 0; +} + +static void +select_opt_map_info(OptMapInfo* now, OptMapInfo* alt) +{ + const int z = 1<<15; /* 32768: something big value */ + + int v1, v2; + + if (alt->value == 0) return ; + if (now->value == 0) { + copy_opt_map_info(now, alt); + return ; + } + + v1 = z / now->value; + v2 = z / alt->value; + if (comp_distance_value(&now->mmd, &alt->mmd, v1, v2) > 0) + copy_opt_map_info(now, alt); +} + +static int +comp_opt_exact_or_map_info(OptExactInfo* e, OptMapInfo* m) +{ +#define COMP_EM_BASE 20 + int ve, vm; + + if (m->value <= 0) return -1; + + ve = COMP_EM_BASE * e->len * (e->ignore_case ? 1 : 2); + vm = COMP_EM_BASE * 5 * 2 / m->value; + return comp_distance_value(&e->mmd, &m->mmd, ve, vm); +} + +static void +alt_merge_opt_map_info(OnigEncoding enc, OptMapInfo* to, OptMapInfo* add) +{ + int i, val; + + /* if (! is_equal_mml(&to->mmd, &add->mmd)) return ; */ + if (to->value == 0) return ; + if (add->value == 0 || to->mmd.max < add->mmd.min) { + clear_opt_map_info(to); + return ; + } + + alt_merge_mml(&to->mmd, &add->mmd); + + val = 0; + for (i = 0; i < ONIG_CHAR_TABLE_SIZE; i++) { + if (add->map[i]) + to->map[i] = 1; + + if (to->map[i]) + val += map_position_value(enc, i); + } + to->value = val; + + alt_merge_opt_anc_info(&to->anc, &add->anc); +} + +static void +set_bound_node_opt_info(NodeOptInfo* opt, MinMaxLen* mmd) +{ + copy_mml(&(opt->exb.mmd), mmd); + copy_mml(&(opt->expr.mmd), mmd); + copy_mml(&(opt->map.mmd), mmd); +} + +static void +clear_node_opt_info(NodeOptInfo* opt) +{ + clear_mml(&opt->len); + clear_opt_anc_info(&opt->anc); + clear_opt_exact_info(&opt->exb); + clear_opt_exact_info(&opt->exm); + clear_opt_exact_info(&opt->expr); + clear_opt_map_info(&opt->map); +} + +static void +copy_node_opt_info(NodeOptInfo* to, NodeOptInfo* from) +{ + *to = *from; +} + +static void +concat_left_node_opt_info(OnigEncoding enc, NodeOptInfo* to, NodeOptInfo* add) +{ + int exb_reach, exm_reach; + OptAncInfo tanc; + + concat_opt_anc_info(&tanc, &to->anc, &add->anc, to->len.max, add->len.max); + copy_opt_anc_info(&to->anc, &tanc); + + if (add->exb.len > 0 && to->len.max == 0) { + concat_opt_anc_info(&tanc, &to->anc, &add->exb.anc, + to->len.max, add->len.max); + copy_opt_anc_info(&add->exb.anc, &tanc); + } + + if (add->map.value > 0 && to->len.max == 0) { + if (add->map.mmd.max == 0) + add->map.anc.left_anchor |= to->anc.left_anchor; + } + + exb_reach = to->exb.reach_end; + exm_reach = to->exm.reach_end; + + if (add->len.max != 0) + to->exb.reach_end = to->exm.reach_end = 0; + + if (add->exb.len > 0) { + if (exb_reach) { + concat_opt_exact_info(&to->exb, &add->exb, enc); + clear_opt_exact_info(&add->exb); + } + else if (exm_reach) { + concat_opt_exact_info(&to->exm, &add->exb, enc); + clear_opt_exact_info(&add->exb); + } + } + select_opt_exact_info(enc, &to->exm, &add->exb); + select_opt_exact_info(enc, &to->exm, &add->exm); + + if (to->expr.len > 0) { + if (add->len.max > 0) { + if (to->expr.len > (int )add->len.max) + to->expr.len = add->len.max; + + if (to->expr.mmd.max == 0) + select_opt_exact_info(enc, &to->exb, &to->expr); + else + select_opt_exact_info(enc, &to->exm, &to->expr); + } + } + else if (add->expr.len > 0) { + copy_opt_exact_info(&to->expr, &add->expr); + } + + select_opt_map_info(&to->map, &add->map); + + add_mml(&to->len, &add->len); +} + +static void +alt_merge_node_opt_info(NodeOptInfo* to, NodeOptInfo* add, OptEnv* env) +{ + alt_merge_opt_anc_info (&to->anc, &add->anc); + alt_merge_opt_exact_info(&to->exb, &add->exb, env); + alt_merge_opt_exact_info(&to->exm, &add->exm, env); + alt_merge_opt_exact_info(&to->expr, &add->expr, env); + alt_merge_opt_map_info(env->enc, &to->map, &add->map); + + alt_merge_mml(&to->len, &add->len); +} + + +#define MAX_NODE_OPT_INFO_REF_COUNT 5 + +static int +optimize_node_left(Node* node, NodeOptInfo* opt, OptEnv* env) +{ + int type; + int r = 0; + + clear_node_opt_info(opt); + set_bound_node_opt_info(opt, &env->mmd); + + type = NTYPE(node); + switch (type) { + case NT_LIST: + { + OptEnv nenv; + NodeOptInfo nopt; + Node* nd = node; + + copy_opt_env(&nenv, env); + do { + r = optimize_node_left(NCAR(nd), &nopt, &nenv); + if (r == 0) { + add_mml(&nenv.mmd, &nopt.len); + concat_left_node_opt_info(env->enc, opt, &nopt); + } + } while (r == 0 && IS_NOT_NULL(nd = NCDR(nd))); + } + break; + + case NT_ALT: + { + NodeOptInfo nopt; + Node* nd = node; + + do { + r = optimize_node_left(NCAR(nd), &nopt, env); + if (r == 0) { + if (nd == node) copy_node_opt_info(opt, &nopt); + else alt_merge_node_opt_info(opt, &nopt, env); + } + } while ((r == 0) && IS_NOT_NULL(nd = NCDR(nd))); + } + break; + + case NT_STR: + { + StrNode* sn = NSTR(node); + int slen = sn->end - sn->s; + int is_raw = NSTRING_IS_RAW(node); + + if (! NSTRING_IS_AMBIG(node)) { + concat_opt_exact_info_str(&opt->exb, sn->s, sn->end, + NSTRING_IS_RAW(node), env->enc); + if (slen > 0) { + add_char_opt_map_info(&opt->map, *(sn->s), env->enc); + } + set_mml(&opt->len, slen, slen); + } + else { + int max; + + if (NSTRING_IS_DONT_GET_OPT_INFO(node)) { + int n = onigenc_strlen(env->enc, sn->s, sn->end); + max = ONIGENC_MBC_MAXLEN_DIST(env->enc) * n; + } + else { + concat_opt_exact_info_str(&opt->exb, sn->s, sn->end, + is_raw, env->enc); + opt->exb.ignore_case = 1; + + if (slen > 0) { + r = add_char_amb_opt_map_info(&opt->map, sn->s, sn->end, + env->enc, env->case_fold_flag); + if (r != 0) break; + } + + max = slen; + } + + set_mml(&opt->len, slen, max); + } + + if (opt->exb.len == slen) + opt->exb.reach_end = 1; + } + break; + + case NT_CCLASS: + { + int i, z; + CClassNode* cc = NCCLASS(node); + + /* no need to check ignore case. (setted in setup_tree()) */ + + if (IS_NOT_NULL(cc->mbuf) || IS_NCCLASS_NOT(cc)) { + OnigDistance min = ONIGENC_MBC_MINLEN(env->enc); + OnigDistance max = ONIGENC_MBC_MAXLEN_DIST(env->enc); + + set_mml(&opt->len, min, max); + } + else { + for (i = 0; i < SINGLE_BYTE_SIZE; i++) { + z = BITSET_AT(cc->bs, i); + if ((z && !IS_NCCLASS_NOT(cc)) || (!z && IS_NCCLASS_NOT(cc))) { + add_char_opt_map_info(&opt->map, (UChar )i, env->enc); + } + } + set_mml(&opt->len, 1, 1); + } + } + break; + + case NT_CTYPE: + { + int i, min, max; + + max = ONIGENC_MBC_MAXLEN_DIST(env->enc); + + if (max == 1) { + min = 1; + + switch (NCTYPE(node)->ctype) { + case ONIGENC_CTYPE_WORD: + if (NCTYPE(node)->not != 0) { + for (i = 0; i < SINGLE_BYTE_SIZE; i++) { + if (! ONIGENC_IS_CODE_WORD(env->enc, i)) { + add_char_opt_map_info(&opt->map, (UChar )i, env->enc); + } + } + } + else { + for (i = 0; i < SINGLE_BYTE_SIZE; i++) { + if (ONIGENC_IS_CODE_WORD(env->enc, i)) { + add_char_opt_map_info(&opt->map, (UChar )i, env->enc); + } + } + } + break; + } + } + else { + min = ONIGENC_MBC_MINLEN(env->enc); + } + set_mml(&opt->len, min, max); + } + break; + + case NT_CANY: + { + OnigDistance min = ONIGENC_MBC_MINLEN(env->enc); + OnigDistance max = ONIGENC_MBC_MAXLEN_DIST(env->enc); + set_mml(&opt->len, min, max); + } + break; + + case NT_ANCHOR: + switch (NANCHOR(node)->type) { + case ANCHOR_BEGIN_BUF: + case ANCHOR_BEGIN_POSITION: + case ANCHOR_BEGIN_LINE: + case ANCHOR_END_BUF: + case ANCHOR_SEMI_END_BUF: + case ANCHOR_END_LINE: + add_opt_anc_info(&opt->anc, NANCHOR(node)->type); + break; + + case ANCHOR_PREC_READ: + { + NodeOptInfo nopt; + + r = optimize_node_left(NANCHOR(node)->target, &nopt, env); + if (r == 0) { + if (nopt.exb.len > 0) + copy_opt_exact_info(&opt->expr, &nopt.exb); + else if (nopt.exm.len > 0) + copy_opt_exact_info(&opt->expr, &nopt.exm); + + opt->expr.reach_end = 0; + + if (nopt.map.value > 0) + copy_opt_map_info(&opt->map, &nopt.map); + } + } + break; + + case ANCHOR_PREC_READ_NOT: + case ANCHOR_LOOK_BEHIND: /* Sorry, I can't make use of it. */ + case ANCHOR_LOOK_BEHIND_NOT: + break; + } + break; + + case NT_BREF: + { + int i; + int* backs; + OnigDistance min, max, tmin, tmax; + Node** nodes = SCANENV_MEM_NODES(env->scan_env); + BRefNode* br = NBREF(node); + + if (br->state & NST_RECURSION) { + set_mml(&opt->len, 0, ONIG_INFINITE_DISTANCE); + break; + } + backs = BACKREFS_P(br); + r = get_min_match_length(nodes[backs[0]], &min, env->scan_env); + if (r != 0) break; + r = get_max_match_length(nodes[backs[0]], &max, env->scan_env); + if (r != 0) break; + for (i = 1; i < br->back_num; i++) { + r = get_min_match_length(nodes[backs[i]], &tmin, env->scan_env); + if (r != 0) break; + r = get_max_match_length(nodes[backs[i]], &tmax, env->scan_env); + if (r != 0) break; + if (min > tmin) min = tmin; + if (max < tmax) max = tmax; + } + if (r == 0) set_mml(&opt->len, min, max); + } + break; + +#ifdef USE_SUBEXP_CALL + case NT_CALL: + if (IS_CALL_RECURSION(NCALL(node))) + set_mml(&opt->len, 0, ONIG_INFINITE_DISTANCE); + else { + OnigOptionType save = env->options; + env->options = NENCLOSE(NCALL(node)->target)->option; + r = optimize_node_left(NCALL(node)->target, opt, env); + env->options = save; + } + break; +#endif + + case NT_QTFR: + { + int i; + OnigDistance min, max; + NodeOptInfo nopt; + QtfrNode* qn = NQTFR(node); + + r = optimize_node_left(qn->target, &nopt, env); + if (r) break; + + if (qn->lower == 0 && IS_REPEAT_INFINITE(qn->upper)) { + if (env->mmd.max == 0 && + NTYPE(qn->target) == NT_CANY && qn->greedy) { + if (IS_MULTILINE(env->options)) + add_opt_anc_info(&opt->anc, ANCHOR_ANYCHAR_STAR_ML); + else + add_opt_anc_info(&opt->anc, ANCHOR_ANYCHAR_STAR); + } + } + else { + if (qn->lower > 0) { + copy_node_opt_info(opt, &nopt); + if (nopt.exb.len > 0) { + if (nopt.exb.reach_end) { + for (i = 2; i < qn->lower && + ! is_full_opt_exact_info(&opt->exb); i++) { + concat_opt_exact_info(&opt->exb, &nopt.exb, env->enc); + } + if (i < qn->lower) { + opt->exb.reach_end = 0; + } + } + } + + if (qn->lower != qn->upper) { + opt->exb.reach_end = 0; + opt->exm.reach_end = 0; + } + if (qn->lower > 1) + opt->exm.reach_end = 0; + } + } + + min = distance_multiply(nopt.len.min, qn->lower); + if (IS_REPEAT_INFINITE(qn->upper)) + max = (nopt.len.max > 0 ? ONIG_INFINITE_DISTANCE : 0); + else + max = distance_multiply(nopt.len.max, qn->upper); + + set_mml(&opt->len, min, max); + } + break; + + case NT_ENCLOSE: + { + EncloseNode* en = NENCLOSE(node); + + switch (en->type) { + case ENCLOSE_OPTION: + { + OnigOptionType save = env->options; + + env->options = en->option; + r = optimize_node_left(en->target, opt, env); + env->options = save; + } + break; + + case ENCLOSE_MEMORY: +#ifdef USE_SUBEXP_CALL + en->opt_count++; + if (en->opt_count > MAX_NODE_OPT_INFO_REF_COUNT) { + OnigDistance min, max; + + min = 0; + max = ONIG_INFINITE_DISTANCE; + if (IS_ENCLOSE_MIN_FIXED(en)) min = en->min_len; + if (IS_ENCLOSE_MAX_FIXED(en)) max = en->max_len; + set_mml(&opt->len, min, max); + } + else +#endif + { + r = optimize_node_left(en->target, opt, env); + + if (is_set_opt_anc_info(&opt->anc, ANCHOR_ANYCHAR_STAR_MASK)) { + if (BIT_STATUS_AT(env->scan_env->backrefed_mem, en->regnum)) + remove_opt_anc_info(&opt->anc, ANCHOR_ANYCHAR_STAR_MASK); + } + } + break; + + case ENCLOSE_STOP_BACKTRACK: + r = optimize_node_left(en->target, opt, env); + break; + } + } + break; + + default: +#ifdef ONIG_DEBUG + fprintf(stderr, "optimize_node_left: undefined node type %d\n", + NTYPE(node)); +#endif + r = ONIGERR_TYPE_BUG; + break; + } + + return r; +} + +static int +set_optimize_exact_info(regex_t* reg, OptExactInfo* e) +{ + int r; + + if (e->len == 0) return 0; + + if (e->ignore_case) { + reg->exact = (UChar* )xmalloc(e->len); + CHECK_NULL_RETURN_MEMERR(reg->exact); + xmemcpy(reg->exact, e->s, e->len); + reg->exact_end = reg->exact + e->len; + reg->optimize = ONIG_OPTIMIZE_EXACT_IC; + } + else { + int allow_reverse; + + reg->exact = str_dup(e->s, e->s + e->len); + CHECK_NULL_RETURN_MEMERR(reg->exact); + reg->exact_end = reg->exact + e->len; + + allow_reverse = + ONIGENC_IS_ALLOWED_REVERSE_MATCH(reg->enc, reg->exact, reg->exact_end); + + if (e->len >= 3 || (e->len >= 2 && allow_reverse)) { + r = set_bm_skip(reg->exact, reg->exact_end, reg->enc, + reg->map, &(reg->int_map)); + if (r) return r; + + reg->optimize = (allow_reverse != 0 + ? ONIG_OPTIMIZE_EXACT_BM : ONIG_OPTIMIZE_EXACT_BM_NOT_REV); + } + else { + reg->optimize = ONIG_OPTIMIZE_EXACT; + } + } + + reg->dmin = e->mmd.min; + reg->dmax = e->mmd.max; + + if (reg->dmin != ONIG_INFINITE_DISTANCE) { + reg->threshold_len = reg->dmin + (reg->exact_end - reg->exact); + } + + return 0; +} + +static void +set_optimize_map_info(regex_t* reg, OptMapInfo* m) +{ + int i; + + for (i = 0; i < ONIG_CHAR_TABLE_SIZE; i++) + reg->map[i] = m->map[i]; + + reg->optimize = ONIG_OPTIMIZE_MAP; + reg->dmin = m->mmd.min; + reg->dmax = m->mmd.max; + + if (reg->dmin != ONIG_INFINITE_DISTANCE) { + reg->threshold_len = reg->dmin + 1; + } +} + +static void +set_sub_anchor(regex_t* reg, OptAncInfo* anc) +{ + reg->sub_anchor |= anc->left_anchor & ANCHOR_BEGIN_LINE; + reg->sub_anchor |= anc->right_anchor & ANCHOR_END_LINE; +} + +#ifdef ONIG_DEBUG +static void print_optimize_info(FILE* f, regex_t* reg); +#endif + +static int +set_optimize_info_from_tree(Node* node, regex_t* reg, ScanEnv* scan_env) +{ + + int r; + NodeOptInfo opt; + OptEnv env; + + env.enc = reg->enc; + env.options = reg->options; + env.case_fold_flag = reg->case_fold_flag; + env.scan_env = scan_env; + clear_mml(&env.mmd); + + r = optimize_node_left(node, &opt, &env); + if (r) return r; + + reg->anchor = opt.anc.left_anchor & (ANCHOR_BEGIN_BUF | + ANCHOR_BEGIN_POSITION | ANCHOR_ANYCHAR_STAR | ANCHOR_ANYCHAR_STAR_ML); + + reg->anchor |= opt.anc.right_anchor & (ANCHOR_END_BUF | ANCHOR_SEMI_END_BUF); + + if (reg->anchor & (ANCHOR_END_BUF | ANCHOR_SEMI_END_BUF)) { + reg->anchor_dmin = opt.len.min; + reg->anchor_dmax = opt.len.max; + } + + if (opt.exb.len > 0 || opt.exm.len > 0) { + select_opt_exact_info(reg->enc, &opt.exb, &opt.exm); + if (opt.map.value > 0 && + comp_opt_exact_or_map_info(&opt.exb, &opt.map) > 0) { + goto set_map; + } + else { + r = set_optimize_exact_info(reg, &opt.exb); + set_sub_anchor(reg, &opt.exb.anc); + } + } + else if (opt.map.value > 0) { + set_map: + set_optimize_map_info(reg, &opt.map); + set_sub_anchor(reg, &opt.map.anc); + } + else { + reg->sub_anchor |= opt.anc.left_anchor & ANCHOR_BEGIN_LINE; + if (opt.len.max == 0) + reg->sub_anchor |= opt.anc.right_anchor & ANCHOR_END_LINE; + } + +#if defined(ONIG_DEBUG_COMPILE) || defined(ONIG_DEBUG_MATCH) + print_optimize_info(stderr, reg); +#endif + return r; +} + +static void +clear_optimize_info(regex_t* reg) +{ + reg->optimize = ONIG_OPTIMIZE_NONE; + reg->anchor = 0; + reg->anchor_dmin = 0; + reg->anchor_dmax = 0; + reg->sub_anchor = 0; + reg->exact_end = (UChar* )NULL; + reg->threshold_len = 0; + if (IS_NOT_NULL(reg->exact)) { + xfree(reg->exact); + reg->exact = (UChar* )NULL; + } +} + +#ifdef ONIG_DEBUG + +static void print_enc_string(FILE* fp, OnigEncoding enc, + const UChar *s, const UChar *end) +{ + fprintf(fp, "\nPATTERN: /"); + + if (ONIGENC_MBC_MINLEN(enc) > 1) { + const UChar *p; + OnigCodePoint code; + + p = s; + while (p < end) { + code = ONIGENC_MBC_TO_CODE(enc, p, end); + if (code >= 0x80) { + fprintf(fp, " 0x%04x ", (int )code); + } + else { + fputc((int )code, fp); + } + + p += enclen(enc, p); + } + } + else { + while (s < end) { + fputc((int )*s, fp); + s++; + } + } + + fprintf(fp, "/\n"); +} + +static void +print_distance_range(FILE* f, OnigDistance a, OnigDistance b) +{ + if (a == ONIG_INFINITE_DISTANCE) + fputs("inf", f); + else + fprintf(f, "(%u)", a); + + fputs("-", f); + + if (b == ONIG_INFINITE_DISTANCE) + fputs("inf", f); + else + fprintf(f, "(%u)", b); +} + +static void +print_anchor(FILE* f, int anchor) +{ + int q = 0; + + fprintf(f, "["); + + if (anchor & ANCHOR_BEGIN_BUF) { + fprintf(f, "begin-buf"); + q = 1; + } + if (anchor & ANCHOR_BEGIN_LINE) { + if (q) fprintf(f, ", "); + q = 1; + fprintf(f, "begin-line"); + } + if (anchor & ANCHOR_BEGIN_POSITION) { + if (q) fprintf(f, ", "); + q = 1; + fprintf(f, "begin-pos"); + } + if (anchor & ANCHOR_END_BUF) { + if (q) fprintf(f, ", "); + q = 1; + fprintf(f, "end-buf"); + } + if (anchor & ANCHOR_SEMI_END_BUF) { + if (q) fprintf(f, ", "); + q = 1; + fprintf(f, "semi-end-buf"); + } + if (anchor & ANCHOR_END_LINE) { + if (q) fprintf(f, ", "); + q = 1; + fprintf(f, "end-line"); + } + if (anchor & ANCHOR_ANYCHAR_STAR) { + if (q) fprintf(f, ", "); + q = 1; + fprintf(f, "anychar-star"); + } + if (anchor & ANCHOR_ANYCHAR_STAR_ML) { + if (q) fprintf(f, ", "); + fprintf(f, "anychar-star-pl"); + } + + fprintf(f, "]"); +} + +static void +print_optimize_info(FILE* f, regex_t* reg) +{ + static const char* on[] = { "NONE", "EXACT", "EXACT_BM", "EXACT_BM_NOT_REV", + "EXACT_IC", "MAP" }; + + fprintf(f, "optimize: %s\n", on[reg->optimize]); + fprintf(f, " anchor: "); print_anchor(f, reg->anchor); + if ((reg->anchor & ANCHOR_END_BUF_MASK) != 0) + print_distance_range(f, reg->anchor_dmin, reg->anchor_dmax); + fprintf(f, "\n"); + + if (reg->optimize) { + fprintf(f, " sub anchor: "); print_anchor(f, reg->sub_anchor); + fprintf(f, "\n"); + } + fprintf(f, "\n"); + + if (reg->exact) { + UChar *p; + fprintf(f, "exact: ["); + for (p = reg->exact; p < reg->exact_end; p++) { + fputc(*p, f); + } + fprintf(f, "]: length: %d\n", (reg->exact_end - reg->exact)); + } + else if (reg->optimize & ONIG_OPTIMIZE_MAP) { + int c, i, n = 0; + + for (i = 0; i < ONIG_CHAR_TABLE_SIZE; i++) + if (reg->map[i]) n++; + + fprintf(f, "map: n=%d\n", n); + if (n > 0) { + c = 0; + fputc('[', f); + for (i = 0; i < ONIG_CHAR_TABLE_SIZE; i++) { + if (reg->map[i] != 0) { + if (c > 0) fputs(", ", f); + c++; + if (ONIGENC_MBC_MAXLEN(reg->enc) == 1 && + ONIGENC_IS_CODE_PRINT(reg->enc, (OnigCodePoint )i)) + fputc(i, f); + else + fprintf(f, "%d", i); + } + } + fprintf(f, "]\n"); + } + } +} +#endif /* ONIG_DEBUG */ + + +static void +onig_free_body(regex_t* reg) +{ + if (IS_NOT_NULL(reg->p)) xfree(reg->p); + if (IS_NOT_NULL(reg->exact)) xfree(reg->exact); + if (IS_NOT_NULL(reg->int_map)) xfree(reg->int_map); + if (IS_NOT_NULL(reg->int_map_backward)) xfree(reg->int_map_backward); + if (IS_NOT_NULL(reg->repeat_range)) xfree(reg->repeat_range); + if (IS_NOT_NULL(reg->chain)) onig_free(reg->chain); + +#ifdef USE_NAMED_GROUP + onig_names_free(reg); +#endif +} + +extern void +onig_free(regex_t* reg) +{ + if (IS_NOT_NULL(reg)) { + onig_free_body(reg); + xfree(reg); + } +} + +#define REGEX_TRANSFER(to,from) do {\ + (to)->state = ONIG_STATE_MODIFY;\ + onig_free_body(to);\ + xmemcpy(to, from, sizeof(regex_t));\ + xfree(from);\ +} while (0) + +extern void +onig_transfer(regex_t* to, regex_t* from) +{ + THREAD_ATOMIC_START; + REGEX_TRANSFER(to, from); + THREAD_ATOMIC_END; +} + +#define REGEX_CHAIN_HEAD(reg) do {\ + while (IS_NOT_NULL((reg)->chain)) {\ + (reg) = (reg)->chain;\ + }\ +} while (0) + +extern void +onig_chain_link_add(regex_t* to, regex_t* add) +{ + THREAD_ATOMIC_START; + REGEX_CHAIN_HEAD(to); + to->chain = add; + THREAD_ATOMIC_END; +} + +extern void +onig_chain_reduce(regex_t* reg) +{ + regex_t *head, *prev; + + prev = reg; + head = prev->chain; + if (IS_NOT_NULL(head)) { + reg->state = ONIG_STATE_MODIFY; + while (IS_NOT_NULL(head->chain)) { + prev = head; + head = head->chain; + } + prev->chain = (regex_t* )NULL; + REGEX_TRANSFER(reg, head); + } +} + +#if 0 +extern int +onig_clone(regex_t** to, regex_t* from) +{ + int r, size; + regex_t* reg; + +#ifdef USE_MULTI_THREAD_SYSTEM + if (ONIG_STATE(from) >= ONIG_STATE_NORMAL) { + ONIG_STATE_INC(from); + if (IS_NOT_NULL(from->chain) && ONIG_STATE(reg) == ONIG_STATE_NORMAL) { + onig_chain_reduce(from); + ONIG_STATE_INC(from); + } + } + else { + int n = 0; + while (ONIG_STATE(from) < ONIG_STATE_NORMAL) { + if (++n > THREAD_PASS_LIMIT_COUNT) + return ONIGERR_OVER_THREAD_PASS_LIMIT_COUNT; + THREAD_PASS; + } + ONIG_STATE_INC(from); + } +#endif /* USE_MULTI_THREAD_SYSTEM */ + + r = onig_alloc_init(®, ONIG_OPTION_NONE, ONIGENC_CASE_FOLD_DEFAULT, + from->enc, ONIG_SYNTAX_DEFAULT); + if (r != 0) { + ONIG_STATE_DEC(from); + return r; + } + + xmemcpy(reg, from, sizeof(onig_t)); + reg->chain = (regex_t* )NULL; + reg->state = ONIG_STATE_NORMAL; + + if (from->p) { + reg->p = (UChar* )xmalloc(reg->alloc); + if (IS_NULL(reg->p)) goto mem_error; + xmemcpy(reg->p, from->p, reg->alloc); + } + + if (from->exact) { + reg->exact = (UChar* )xmalloc(from->exact_end - from->exact); + if (IS_NULL(reg->exact)) goto mem_error; + reg->exact_end = reg->exact + (from->exact_end - from->exact); + xmemcpy(reg->exact, from->exact, reg->exact_end - reg->exact); + } + + if (from->int_map) { + size = sizeof(int) * ONIG_CHAR_TABLE_SIZE; + reg->int_map = (int* )xmalloc(size); + if (IS_NULL(reg->int_map)) goto mem_error; + xmemcpy(reg->int_map, from->int_map, size); + } + + if (from->int_map_backward) { + size = sizeof(int) * ONIG_CHAR_TABLE_SIZE; + reg->int_map_backward = (int* )xmalloc(size); + if (IS_NULL(reg->int_map_backward)) goto mem_error; + xmemcpy(reg->int_map_backward, from->int_map_backward, size); + } + +#ifdef USE_NAMED_GROUP + reg->name_table = names_clone(from); /* names_clone is not implemented */ +#endif + + ONIG_STATE_DEC(from); + *to = reg; + return 0; + + mem_error: + ONIG_STATE_DEC(from); + return ONIGERR_MEMORY; +} +#endif + +#ifdef ONIG_DEBUG +static void print_compiled_byte_code_list P_((FILE* f, regex_t* reg)); +#endif +#ifdef ONIG_DEBUG_PARSE_TREE +static void print_tree P_((FILE* f, Node* node)); +#endif + +extern int +onig_compile(regex_t* reg, const UChar* pattern, const UChar* pattern_end, + OnigErrorInfo* einfo) +{ +#define COMPILE_INIT_SIZE 20 + + int r, init_size; + Node* root; + ScanEnv scan_env; +#ifdef USE_SUBEXP_CALL + UnsetAddrList uslist; +#endif + + reg->state = ONIG_STATE_COMPILING; + +#ifdef ONIG_DEBUG + print_enc_string(stderr, reg->enc, pattern, pattern_end); +#endif + + if (reg->alloc == 0) { + init_size = (pattern_end - pattern) * 2; + if (init_size <= 0) init_size = COMPILE_INIT_SIZE; + r = BBUF_INIT(reg, init_size); + if (r != 0) goto end; + } + else + reg->used = 0; + + reg->num_mem = 0; + reg->num_repeat = 0; + reg->num_null_check = 0; + reg->repeat_range_alloc = 0; + reg->repeat_range = (OnigRepeatRange* )NULL; +#ifdef USE_COMBINATION_EXPLOSION_CHECK + reg->num_comb_exp_check = 0; +#endif + + r = onig_parse_make_tree(&root, pattern, pattern_end, reg, &scan_env); + if (r != 0) goto err; + +#ifdef USE_NAMED_GROUP + /* mixed use named group and no-named group */ + if (scan_env.num_named > 0 && + IS_SYNTAX_BV(scan_env.syntax, ONIG_SYN_CAPTURE_ONLY_NAMED_GROUP) && + !ONIG_IS_OPTION_ON(reg->options, ONIG_OPTION_CAPTURE_GROUP)) { + if (scan_env.num_named != scan_env.num_mem) + r = disable_noname_group_capture(&root, reg, &scan_env); + else + r = numbered_ref_check(root); + + if (r != 0) goto err; + } +#endif + +#ifdef USE_SUBEXP_CALL + if (scan_env.num_call > 0) { + r = unset_addr_list_init(&uslist, scan_env.num_call); + if (r != 0) goto err; + scan_env.unset_addr_list = &uslist; + r = setup_subexp_call(root, &scan_env); + if (r != 0) goto err_unset; + r = subexp_recursive_check_trav(root, &scan_env); + if (r < 0) goto err_unset; + r = subexp_inf_recursive_check_trav(root, &scan_env); + if (r != 0) goto err_unset; + + reg->num_call = scan_env.num_call; + } + else + reg->num_call = 0; +#endif + + r = setup_tree(root, reg, 0, &scan_env); + if (r != 0) goto err_unset; + +#ifdef ONIG_DEBUG_PARSE_TREE + print_tree(stderr, root); +#endif + + reg->capture_history = scan_env.capture_history; + reg->bt_mem_start = scan_env.bt_mem_start; + reg->bt_mem_start |= reg->capture_history; + if (IS_FIND_CONDITION(reg->options)) + BIT_STATUS_ON_ALL(reg->bt_mem_end); + else { + reg->bt_mem_end = scan_env.bt_mem_end; + reg->bt_mem_end |= reg->capture_history; + } + +#ifdef USE_COMBINATION_EXPLOSION_CHECK + if (scan_env.backrefed_mem == 0 +#ifdef USE_SUBEXP_CALL + || scan_env.num_call == 0 +#endif + ) { + setup_comb_exp_check(root, 0, &scan_env); +#ifdef USE_SUBEXP_CALL + if (scan_env.has_recursion != 0) { + scan_env.num_comb_exp_check = 0; + } + else +#endif + if (scan_env.comb_exp_max_regnum > 0) { + int i; + for (i = 1; i <= scan_env.comb_exp_max_regnum; i++) { + if (BIT_STATUS_AT(scan_env.backrefed_mem, i) != 0) { + scan_env.num_comb_exp_check = 0; + break; + } + } + } + } + + reg->num_comb_exp_check = scan_env.num_comb_exp_check; +#endif + + clear_optimize_info(reg); +#ifndef ONIG_DONT_OPTIMIZE + r = set_optimize_info_from_tree(root, reg, &scan_env); + if (r != 0) goto err_unset; +#endif + + if (IS_NOT_NULL(scan_env.mem_nodes_dynamic)) { + xfree(scan_env.mem_nodes_dynamic); + scan_env.mem_nodes_dynamic = (Node** )NULL; + } + + r = compile_tree(root, reg); + if (r == 0) { + r = add_opcode(reg, OP_END); +#ifdef USE_SUBEXP_CALL + if (scan_env.num_call > 0) { + r = unset_addr_list_fix(&uslist, reg); + unset_addr_list_end(&uslist); + if (r) goto err; + } +#endif + + if ((reg->num_repeat != 0) || (reg->bt_mem_end != 0)) + reg->stack_pop_level = STACK_POP_LEVEL_ALL; + else { + if (reg->bt_mem_start != 0) + reg->stack_pop_level = STACK_POP_LEVEL_MEM_START; + else + reg->stack_pop_level = STACK_POP_LEVEL_FREE; + } + } +#ifdef USE_SUBEXP_CALL + else if (scan_env.num_call > 0) { + unset_addr_list_end(&uslist); + } +#endif + onig_node_free(root); + +#ifdef ONIG_DEBUG_COMPILE +#ifdef USE_NAMED_GROUP + onig_print_names(stderr, reg); +#endif + print_compiled_byte_code_list(stderr, reg); +#endif + + end: + reg->state = ONIG_STATE_NORMAL; + return r; + + err_unset: +#ifdef USE_SUBEXP_CALL + if (scan_env.num_call > 0) { + unset_addr_list_end(&uslist); + } +#endif + err: + if (IS_NOT_NULL(scan_env.error)) { + if (IS_NOT_NULL(einfo)) { + einfo->enc = scan_env.enc; + einfo->par = scan_env.error; + einfo->par_end = scan_env.error_end; + } + } + + onig_node_free(root); + if (IS_NOT_NULL(scan_env.mem_nodes_dynamic)) + xfree(scan_env.mem_nodes_dynamic); + return r; +} + +#ifdef USE_RECOMPILE_API +extern int +onig_recompile(regex_t* reg, const UChar* pattern, const UChar* pattern_end, + OnigOptionType option, OnigEncoding enc, OnigSyntaxType* syntax, + OnigErrorInfo* einfo) +{ + int r; + regex_t *new_reg; + + r = onig_new(&new_reg, pattern, pattern_end, option, enc, syntax, einfo); + if (r) return r; + if (ONIG_STATE(reg) == ONIG_STATE_NORMAL) { + onig_transfer(reg, new_reg); + } + else { + onig_chain_link_add(reg, new_reg); + } + return 0; +} +#endif + +static int onig_inited = 0; + +extern int +onig_alloc_init(regex_t** reg, OnigOptionType option, + OnigCaseFoldType case_fold_flag, + OnigEncoding enc, const OnigSyntaxType* syntax) +{ + if (! onig_inited) + onig_init(); + + if (ONIGENC_IS_UNDEF(enc)) + return ONIGERR_DEFAULT_ENCODING_IS_NOT_SETTED; + + if ((option & (ONIG_OPTION_DONT_CAPTURE_GROUP|ONIG_OPTION_CAPTURE_GROUP)) + == (ONIG_OPTION_DONT_CAPTURE_GROUP|ONIG_OPTION_CAPTURE_GROUP)) { + return ONIGERR_INVALID_COMBINATION_OF_OPTIONS; + } + + *reg = (regex_t* )xmalloc(sizeof(regex_t)); + if (IS_NULL(*reg)) return ONIGERR_MEMORY; + (*reg)->state = ONIG_STATE_MODIFY; + + if ((option & ONIG_OPTION_NEGATE_SINGLELINE) != 0) { + option |= syntax->options; + option &= ~ONIG_OPTION_SINGLELINE; + } + else + option |= syntax->options; + + (*reg)->enc = enc; + (*reg)->options = option; + (*reg)->syntax = syntax; + (*reg)->optimize = 0; + (*reg)->exact = (UChar* )NULL; + (*reg)->int_map = (int* )NULL; + (*reg)->int_map_backward = (int* )NULL; + (*reg)->chain = (regex_t* )NULL; + + (*reg)->p = (UChar* )NULL; + (*reg)->alloc = 0; + (*reg)->used = 0; + (*reg)->name_table = (void* )NULL; + + (*reg)->case_fold_flag = case_fold_flag; + return 0; +} + +extern int +onig_new(regex_t** reg, const UChar* pattern, const UChar* pattern_end, + OnigOptionType option, OnigEncoding enc, const OnigSyntaxType* syntax, + OnigErrorInfo* einfo) +{ + int r; + + if (IS_NOT_NULL(einfo)) einfo->par = (UChar* )NULL; + + r = onig_alloc_init(reg, option, ONIGENC_CASE_FOLD_DEFAULT, + enc, syntax); + if (r) return r; + + r = onig_compile(*reg, pattern, pattern_end, einfo); + if (r) { + onig_free(*reg); + *reg = NULL; + } + return r; +} + +extern int +onig_init(void) +{ + if (onig_inited != 0) + return 0; + + THREAD_SYSTEM_INIT; + THREAD_ATOMIC_START; + + onig_inited = 1; + + onigenc_init(); + /* onigenc_set_default_caseconv_table((UChar* )0); */ + +#ifdef ONIG_DEBUG_STATISTICS + onig_statistics_init(); +#endif + + THREAD_ATOMIC_END; + return 0; +} + + +extern int +onig_end(void) +{ + THREAD_ATOMIC_START; + +#ifdef ONIG_DEBUG_STATISTICS + onig_print_statistics(stderr); +#endif + +#ifdef USE_SHARED_CCLASS_TABLE + onig_free_shared_cclass_table(); +#endif + +#ifdef USE_PARSE_TREE_NODE_RECYCLE + onig_free_node_list(); +#endif + + onig_inited = 0; + + THREAD_ATOMIC_END; + THREAD_SYSTEM_END; + return 0; +} + +extern int +onig_is_in_code_range(const UChar* p, OnigCodePoint code) +{ + OnigCodePoint n, *data; + OnigCodePoint low, high, x; + + GET_CODE_POINT(n, p); + data = (OnigCodePoint* )p; + data++; + + for (low = 0, high = n; low < high; ) { + x = (low + high) >> 1; + if (code > data[x * 2 + 1]) + low = x + 1; + else + high = x; + } + + return ((low < n && code >= data[low * 2]) ? 1 : 0); +} + +extern int +onig_is_code_in_cc_len(int elen, OnigCodePoint code, CClassNode* cc) +{ + int found; + + if (elen > 1 || (code >= SINGLE_BYTE_SIZE)) { + if (IS_NULL(cc->mbuf)) { + found = 0; + } + else { + found = (onig_is_in_code_range(cc->mbuf->p, code) != 0 ? 1 : 0); + } + } + else { + found = (BITSET_AT(cc->bs, code) == 0 ? 0 : 1); + } + + if (IS_NCCLASS_NOT(cc)) + return !found; + else + return found; +} + +extern int +onig_is_code_in_cc(OnigEncoding enc, OnigCodePoint code, CClassNode* cc) +{ + int len; + + if (ONIGENC_MBC_MINLEN(enc) > 1) { + len = 2; + } + else { + len = ONIGENC_CODE_TO_MBCLEN(enc, code); + } + return onig_is_code_in_cc_len(len, code, cc); +} + + +#ifdef ONIG_DEBUG + +/* arguments type */ +#define ARG_SPECIAL -1 +#define ARG_NON 0 +#define ARG_RELADDR 1 +#define ARG_ABSADDR 2 +#define ARG_LENGTH 3 +#define ARG_MEMNUM 4 +#define ARG_OPTION 5 +#define ARG_STATE_CHECK 6 + +OnigOpInfoType OnigOpInfo[] = { + { OP_FINISH, "finish", ARG_NON }, + { OP_END, "end", ARG_NON }, + { OP_EXACT1, "exact1", ARG_SPECIAL }, + { OP_EXACT2, "exact2", ARG_SPECIAL }, + { OP_EXACT3, "exact3", ARG_SPECIAL }, + { OP_EXACT4, "exact4", ARG_SPECIAL }, + { OP_EXACT5, "exact5", ARG_SPECIAL }, + { OP_EXACTN, "exactn", ARG_SPECIAL }, + { OP_EXACTMB2N1, "exactmb2-n1", ARG_SPECIAL }, + { OP_EXACTMB2N2, "exactmb2-n2", ARG_SPECIAL }, + { OP_EXACTMB2N3, "exactmb2-n3", ARG_SPECIAL }, + { OP_EXACTMB2N, "exactmb2-n", ARG_SPECIAL }, + { OP_EXACTMB3N, "exactmb3n" , ARG_SPECIAL }, + { OP_EXACTMBN, "exactmbn", ARG_SPECIAL }, + { OP_EXACT1_IC, "exact1-ic", ARG_SPECIAL }, + { OP_EXACTN_IC, "exactn-ic", ARG_SPECIAL }, + { OP_CCLASS, "cclass", ARG_SPECIAL }, + { OP_CCLASS_MB, "cclass-mb", ARG_SPECIAL }, + { OP_CCLASS_MIX, "cclass-mix", ARG_SPECIAL }, + { OP_CCLASS_NOT, "cclass-not", ARG_SPECIAL }, + { OP_CCLASS_MB_NOT, "cclass-mb-not", ARG_SPECIAL }, + { OP_CCLASS_MIX_NOT, "cclass-mix-not", ARG_SPECIAL }, + { OP_CCLASS_NODE, "cclass-node", ARG_SPECIAL }, + { OP_ANYCHAR, "anychar", ARG_NON }, + { OP_ANYCHAR_ML, "anychar-ml", ARG_NON }, + { OP_ANYCHAR_STAR, "anychar*", ARG_NON }, + { OP_ANYCHAR_ML_STAR, "anychar-ml*", ARG_NON }, + { OP_ANYCHAR_STAR_PEEK_NEXT, "anychar*-peek-next", ARG_SPECIAL }, + { OP_ANYCHAR_ML_STAR_PEEK_NEXT, "anychar-ml*-peek-next", ARG_SPECIAL }, + { OP_WORD, "word", ARG_NON }, + { OP_NOT_WORD, "not-word", ARG_NON }, + { OP_WORD_BOUND, "word-bound", ARG_NON }, + { OP_NOT_WORD_BOUND, "not-word-bound", ARG_NON }, + { OP_WORD_BEGIN, "word-begin", ARG_NON }, + { OP_WORD_END, "word-end", ARG_NON }, + { OP_BEGIN_BUF, "begin-buf", ARG_NON }, + { OP_END_BUF, "end-buf", ARG_NON }, + { OP_BEGIN_LINE, "begin-line", ARG_NON }, + { OP_END_LINE, "end-line", ARG_NON }, + { OP_SEMI_END_BUF, "semi-end-buf", ARG_NON }, + { OP_BEGIN_POSITION, "begin-position", ARG_NON }, + { OP_BACKREF1, "backref1", ARG_NON }, + { OP_BACKREF2, "backref2", ARG_NON }, + { OP_BACKREFN, "backrefn", ARG_MEMNUM }, + { OP_BACKREFN_IC, "backrefn-ic", ARG_SPECIAL }, + { OP_BACKREF_MULTI, "backref_multi", ARG_SPECIAL }, + { OP_BACKREF_MULTI_IC, "backref_multi-ic", ARG_SPECIAL }, + { OP_BACKREF_WITH_LEVEL, "backref_at_level", ARG_SPECIAL }, + { OP_MEMORY_START_PUSH, "mem-start-push", ARG_MEMNUM }, + { OP_MEMORY_START, "mem-start", ARG_MEMNUM }, + { OP_MEMORY_END_PUSH, "mem-end-push", ARG_MEMNUM }, + { OP_MEMORY_END_PUSH_REC, "mem-end-push-rec", ARG_MEMNUM }, + { OP_MEMORY_END, "mem-end", ARG_MEMNUM }, + { OP_MEMORY_END_REC, "mem-end-rec", ARG_MEMNUM }, + { OP_SET_OPTION_PUSH, "set-option-push", ARG_OPTION }, + { OP_SET_OPTION, "set-option", ARG_OPTION }, + { OP_FAIL, "fail", ARG_NON }, + { OP_JUMP, "jump", ARG_RELADDR }, + { OP_PUSH, "push", ARG_RELADDR }, + { OP_POP, "pop", ARG_NON }, + { OP_PUSH_OR_JUMP_EXACT1, "push-or-jump-e1", ARG_SPECIAL }, + { OP_PUSH_IF_PEEK_NEXT, "push-if-peek-next", ARG_SPECIAL }, + { OP_REPEAT, "repeat", ARG_SPECIAL }, + { OP_REPEAT_NG, "repeat-ng", ARG_SPECIAL }, + { OP_REPEAT_INC, "repeat-inc", ARG_MEMNUM }, + { OP_REPEAT_INC_NG, "repeat-inc-ng", ARG_MEMNUM }, + { OP_REPEAT_INC_SG, "repeat-inc-sg", ARG_MEMNUM }, + { OP_REPEAT_INC_NG_SG, "repeat-inc-ng-sg", ARG_MEMNUM }, + { OP_NULL_CHECK_START, "null-check-start", ARG_MEMNUM }, + { OP_NULL_CHECK_END, "null-check-end", ARG_MEMNUM }, + { OP_NULL_CHECK_END_MEMST,"null-check-end-memst", ARG_MEMNUM }, + { OP_NULL_CHECK_END_MEMST_PUSH,"null-check-end-memst-push", ARG_MEMNUM }, + { OP_PUSH_POS, "push-pos", ARG_NON }, + { OP_POP_POS, "pop-pos", ARG_NON }, + { OP_PUSH_POS_NOT, "push-pos-not", ARG_RELADDR }, + { OP_FAIL_POS, "fail-pos", ARG_NON }, + { OP_PUSH_STOP_BT, "push-stop-bt", ARG_NON }, + { OP_POP_STOP_BT, "pop-stop-bt", ARG_NON }, + { OP_LOOK_BEHIND, "look-behind", ARG_SPECIAL }, + { OP_PUSH_LOOK_BEHIND_NOT, "push-look-behind-not", ARG_SPECIAL }, + { OP_FAIL_LOOK_BEHIND_NOT, "fail-look-behind-not", ARG_NON }, + { OP_CALL, "call", ARG_ABSADDR }, + { OP_RETURN, "return", ARG_NON }, + { OP_STATE_CHECK_PUSH, "state-check-push", ARG_SPECIAL }, + { OP_STATE_CHECK_PUSH_OR_JUMP, "state-check-push-or-jump", ARG_SPECIAL }, + { OP_STATE_CHECK, "state-check", ARG_STATE_CHECK }, + { OP_STATE_CHECK_ANYCHAR_STAR, "state-check-anychar*", ARG_STATE_CHECK }, + { OP_STATE_CHECK_ANYCHAR_ML_STAR, + "state-check-anychar-ml*", ARG_STATE_CHECK }, + { -1, "", ARG_NON } +}; + +static char* +op2name(int opcode) +{ + int i; + + for (i = 0; OnigOpInfo[i].opcode >= 0; i++) { + if (opcode == OnigOpInfo[i].opcode) + return OnigOpInfo[i].name; + } + return ""; +} + +static int +op2arg_type(int opcode) +{ + int i; + + for (i = 0; OnigOpInfo[i].opcode >= 0; i++) { + if (opcode == OnigOpInfo[i].opcode) + return OnigOpInfo[i].arg_type; + } + return ARG_SPECIAL; +} + +static void +Indent(FILE* f, int indent) +{ + int i; + for (i = 0; i < indent; i++) putc(' ', f); +} + +static void +p_string(FILE* f, int len, UChar* s) +{ + fputs(":", f); + while (len-- > 0) { fputc(*s++, f); } +} + +static void +p_len_string(FILE* f, LengthType len, int mb_len, UChar* s) +{ + int x = len * mb_len; + + fprintf(f, ":%d:", len); + while (x-- > 0) { fputc(*s++, f); } +} + +extern void +onig_print_compiled_byte_code(FILE* f, UChar* bp, UChar** nextp, + OnigEncoding enc) +{ + int i, n, arg_type; + RelAddrType addr; + LengthType len; + MemNumType mem; + StateCheckNumType scn; + OnigCodePoint code; + UChar *q; + + fprintf(f, "[%s", op2name(*bp)); + arg_type = op2arg_type(*bp); + if (arg_type != ARG_SPECIAL) { + bp++; + switch (arg_type) { + case ARG_NON: + break; + case ARG_RELADDR: + GET_RELADDR_INC(addr, bp); + fprintf(f, ":(%d)", addr); + break; + case ARG_ABSADDR: + GET_ABSADDR_INC(addr, bp); + fprintf(f, ":(%d)", addr); + break; + case ARG_LENGTH: + GET_LENGTH_INC(len, bp); + fprintf(f, ":%d", len); + break; + case ARG_MEMNUM: + mem = *((MemNumType* )bp); + bp += SIZE_MEMNUM; + fprintf(f, ":%d", mem); + break; + case ARG_OPTION: + { + OnigOptionType option = *((OnigOptionType* )bp); + bp += SIZE_OPTION; + fprintf(f, ":%d", option); + } + break; + + case ARG_STATE_CHECK: + scn = *((StateCheckNumType* )bp); + bp += SIZE_STATE_CHECK_NUM; + fprintf(f, ":%d", scn); + break; + } + } + else { + switch (*bp++) { + case OP_EXACT1: + case OP_ANYCHAR_STAR_PEEK_NEXT: + case OP_ANYCHAR_ML_STAR_PEEK_NEXT: + p_string(f, 1, bp++); break; + case OP_EXACT2: + p_string(f, 2, bp); bp += 2; break; + case OP_EXACT3: + p_string(f, 3, bp); bp += 3; break; + case OP_EXACT4: + p_string(f, 4, bp); bp += 4; break; + case OP_EXACT5: + p_string(f, 5, bp); bp += 5; break; + case OP_EXACTN: + GET_LENGTH_INC(len, bp); + p_len_string(f, len, 1, bp); + bp += len; + break; + + case OP_EXACTMB2N1: + p_string(f, 2, bp); bp += 2; break; + case OP_EXACTMB2N2: + p_string(f, 4, bp); bp += 4; break; + case OP_EXACTMB2N3: + p_string(f, 6, bp); bp += 6; break; + case OP_EXACTMB2N: + GET_LENGTH_INC(len, bp); + p_len_string(f, len, 2, bp); + bp += len * 2; + break; + case OP_EXACTMB3N: + GET_LENGTH_INC(len, bp); + p_len_string(f, len, 3, bp); + bp += len * 3; + break; + case OP_EXACTMBN: + { + int mb_len; + + GET_LENGTH_INC(mb_len, bp); + GET_LENGTH_INC(len, bp); + fprintf(f, ":%d:%d:", mb_len, len); + n = len * mb_len; + while (n-- > 0) { fputc(*bp++, f); } + } + break; + + case OP_EXACT1_IC: + len = enclen(enc, bp); + p_string(f, len, bp); + bp += len; + break; + case OP_EXACTN_IC: + GET_LENGTH_INC(len, bp); + p_len_string(f, len, 1, bp); + bp += len; + break; + + case OP_CCLASS: + n = bitset_on_num((BitSetRef )bp); + bp += SIZE_BITSET; + fprintf(f, ":%d", n); + break; + + case OP_CCLASS_NOT: + n = bitset_on_num((BitSetRef )bp); + bp += SIZE_BITSET; + fprintf(f, ":%d", n); + break; + + case OP_CCLASS_MB: + case OP_CCLASS_MB_NOT: + GET_LENGTH_INC(len, bp); + q = bp; +#ifndef PLATFORM_UNALIGNED_WORD_ACCESS + ALIGNMENT_RIGHT(q); +#endif + GET_CODE_POINT(code, q); + bp += len; + fprintf(f, ":%d:%d", (int )code, len); + break; + + case OP_CCLASS_MIX: + case OP_CCLASS_MIX_NOT: + n = bitset_on_num((BitSetRef )bp); + bp += SIZE_BITSET; + GET_LENGTH_INC(len, bp); + q = bp; +#ifndef PLATFORM_UNALIGNED_WORD_ACCESS + ALIGNMENT_RIGHT(q); +#endif + GET_CODE_POINT(code, q); + bp += len; + fprintf(f, ":%d:%d:%d", n, (int )code, len); + break; + + case OP_CCLASS_NODE: + { + CClassNode *cc; + + GET_POINTER_INC(cc, bp); + n = bitset_on_num(cc->bs); + fprintf(f, ":%u:%d", (unsigned int )cc, n); + } + break; + + case OP_BACKREFN_IC: + mem = *((MemNumType* )bp); + bp += SIZE_MEMNUM; + fprintf(f, ":%d", mem); + break; + + case OP_BACKREF_MULTI_IC: + case OP_BACKREF_MULTI: + fputs(" ", f); + GET_LENGTH_INC(len, bp); + for (i = 0; i < len; i++) { + GET_MEMNUM_INC(mem, bp); + if (i > 0) fputs(", ", f); + fprintf(f, "%d", mem); + } + break; + + case OP_BACKREF_WITH_LEVEL: + { + OnigOptionType option; + LengthType level; + + GET_OPTION_INC(option, bp); + fprintf(f, ":%d", option); + GET_LENGTH_INC(level, bp); + fprintf(f, ":%d", level); + + fputs(" ", f); + GET_LENGTH_INC(len, bp); + for (i = 0; i < len; i++) { + GET_MEMNUM_INC(mem, bp); + if (i > 0) fputs(", ", f); + fprintf(f, "%d", mem); + } + } + break; + + case OP_REPEAT: + case OP_REPEAT_NG: + { + mem = *((MemNumType* )bp); + bp += SIZE_MEMNUM; + addr = *((RelAddrType* )bp); + bp += SIZE_RELADDR; + fprintf(f, ":%d:%d", mem, addr); + } + break; + + case OP_PUSH_OR_JUMP_EXACT1: + case OP_PUSH_IF_PEEK_NEXT: + addr = *((RelAddrType* )bp); + bp += SIZE_RELADDR; + fprintf(f, ":(%d)", addr); + p_string(f, 1, bp); + bp += 1; + break; + + case OP_LOOK_BEHIND: + GET_LENGTH_INC(len, bp); + fprintf(f, ":%d", len); + break; + + case OP_PUSH_LOOK_BEHIND_NOT: + GET_RELADDR_INC(addr, bp); + GET_LENGTH_INC(len, bp); + fprintf(f, ":%d:(%d)", len, addr); + break; + + case OP_STATE_CHECK_PUSH: + case OP_STATE_CHECK_PUSH_OR_JUMP: + scn = *((StateCheckNumType* )bp); + bp += SIZE_STATE_CHECK_NUM; + addr = *((RelAddrType* )bp); + bp += SIZE_RELADDR; + fprintf(f, ":%d:(%d)", scn, addr); + break; + + default: + fprintf(stderr, "onig_print_compiled_byte_code: undefined code %d\n", + *--bp); + } + } + fputs("]", f); + if (nextp) *nextp = bp; +} + +static void +print_compiled_byte_code_list(FILE* f, regex_t* reg) +{ + int ncode; + UChar* bp = reg->p; + UChar* end = reg->p + reg->used; + + fprintf(f, "code length: %d\n", reg->used); + + ncode = 0; + while (bp < end) { + ncode++; + if (bp > reg->p) { + if (ncode % 5 == 0) + fprintf(f, "\n"); + else + fputs(" ", f); + } + onig_print_compiled_byte_code(f, bp, &bp, reg->enc); + } + + fprintf(f, "\n"); +} + +static void +print_indent_tree(FILE* f, Node* node, int indent) +{ + int i, type; + int add = 3; + UChar* p; + + Indent(f, indent); + if (IS_NULL(node)) { + fprintf(f, "ERROR: null node!!!\n"); + exit (0); + } + + type = NTYPE(node); + switch (type) { + case NT_LIST: + case NT_ALT: + if (NTYPE(node) == NT_LIST) + fprintf(f, "<list:%x>\n", (int )node); + else + fprintf(f, "<alt:%x>\n", (int )node); + + print_indent_tree(f, NCAR(node), indent + add); + while (IS_NOT_NULL(node = NCDR(node))) { + if (NTYPE(node) != type) { + fprintf(f, "ERROR: list/alt right is not a cons. %d\n", NTYPE(node)); + exit(0); + } + print_indent_tree(f, NCAR(node), indent + add); + } + break; + + case NT_STR: + fprintf(f, "<string%s:%x>", + (NSTRING_IS_RAW(node) ? "-raw" : ""), (int )node); + for (p = NSTR(node)->s; p < NSTR(node)->end; p++) { + if (*p >= 0x20 && *p < 0x7f) + fputc(*p, f); + else { + fprintf(f, " 0x%02x", *p); + } + } + break; + + case NT_CCLASS: + fprintf(f, "<cclass:%x>", (int )node); + if (IS_NCCLASS_NOT(NCCLASS(node))) fputs(" not", f); + if (NCCLASS(node)->mbuf) { + BBuf* bbuf = NCCLASS(node)->mbuf; + for (i = 0; i < bbuf->used; i++) { + if (i > 0) fprintf(f, ","); + fprintf(f, "%0x", bbuf->p[i]); + } + } + break; + + case NT_CTYPE: + fprintf(f, "<ctype:%x> ", (int )node); + switch (NCTYPE(node)->ctype) { + case ONIGENC_CTYPE_WORD: + if (NCTYPE(node)->not != 0) + fputs("not word", f); + else + fputs("word", f); + break; + + default: + fprintf(f, "ERROR: undefined ctype.\n"); + exit(0); + } + break; + + case NT_CANY: + fprintf(f, "<anychar:%x>", (int )node); + break; + + case NT_ANCHOR: + fprintf(f, "<anchor:%x> ", (int )node); + switch (NANCHOR(node)->type) { + case ANCHOR_BEGIN_BUF: fputs("begin buf", f); break; + case ANCHOR_END_BUF: fputs("end buf", f); break; + case ANCHOR_BEGIN_LINE: fputs("begin line", f); break; + case ANCHOR_END_LINE: fputs("end line", f); break; + case ANCHOR_SEMI_END_BUF: fputs("semi end buf", f); break; + case ANCHOR_BEGIN_POSITION: fputs("begin position", f); break; + + case ANCHOR_WORD_BOUND: fputs("word bound", f); break; + case ANCHOR_NOT_WORD_BOUND: fputs("not word bound", f); break; +#ifdef USE_WORD_BEGIN_END + case ANCHOR_WORD_BEGIN: fputs("word begin", f); break; + case ANCHOR_WORD_END: fputs("word end", f); break; +#endif + case ANCHOR_PREC_READ: fputs("prec read", f); break; + case ANCHOR_PREC_READ_NOT: fputs("prec read not", f); break; + case ANCHOR_LOOK_BEHIND: fputs("look_behind", f); break; + case ANCHOR_LOOK_BEHIND_NOT: fputs("look_behind_not",f); break; + + default: + fprintf(f, "ERROR: undefined anchor type.\n"); + break; + } + break; + + case NT_BREF: + { + int* p; + BRefNode* br = NBREF(node); + p = BACKREFS_P(br); + fprintf(f, "<backref:%x>", (int )node); + for (i = 0; i < br->back_num; i++) { + if (i > 0) fputs(", ", f); + fprintf(f, "%d", p[i]); + } + } + break; + +#ifdef USE_SUBEXP_CALL + case NT_CALL: + { + CallNode* cn = NCALL(node); + fprintf(f, "<call:%x>", (int )node); + p_string(f, cn->name_end - cn->name, cn->name); + } + break; +#endif + + case NT_QTFR: + fprintf(f, "<quantifier:%x>{%d,%d}%s\n", (int )node, + NQTFR(node)->lower, NQTFR(node)->upper, + (NQTFR(node)->greedy ? "" : "?")); + print_indent_tree(f, NQTFR(node)->target, indent + add); + break; + + case NT_ENCLOSE: + fprintf(f, "<enclose:%x> ", (int )node); + switch (NENCLOSE(node)->type) { + case ENCLOSE_OPTION: + fprintf(f, "option:%d\n", NENCLOSE(node)->option); + print_indent_tree(f, NENCLOSE(node)->target, indent + add); + break; + case ENCLOSE_MEMORY: + fprintf(f, "memory:%d", NENCLOSE(node)->regnum); + break; + case ENCLOSE_STOP_BACKTRACK: + fprintf(f, "stop-bt"); + break; + + default: + break; + } + fprintf(f, "\n"); + print_indent_tree(f, NENCLOSE(node)->target, indent + add); + break; + + default: + fprintf(f, "print_indent_tree: undefined node type %d\n", NTYPE(node)); + break; + } + + if (type != NT_LIST && type != NT_ALT && type != NT_QTFR && + type != NT_ENCLOSE) + fprintf(f, "\n"); + fflush(f); +} +#endif /* ONIG_DEBUG */ + +#ifdef ONIG_DEBUG_PARSE_TREE +static void +print_tree(FILE* f, Node* node) +{ + print_indent_tree(f, node, 0); +} +#endif |