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regcomp.c
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/**********************************************************************
regcomp.c - Onigmo (Oniguruma-mod) (regular expression library)
**********************************************************************/
/*-
* Copyright (c) 2002-2013 K.Kosako <sndgk393 AT ybb DOT ne DOT jp>
* Copyright (c) 2011-2016 K.Takata <kentkt AT csc 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
#if 0
static UChar*
str_dup(UChar* s, UChar* end)
{
ptrdiff_t 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;
}
#endif
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) {
size_t 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) {
size_t 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 < 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
// Attempt to right size allocated buffers for a regex post compile
static void
onig_reg_resize(regex_t *reg)
{
resize:
if (reg->alloc > reg->used) {
unsigned char *new_ptr = xrealloc(reg->p, reg->used);
// Skip the right size optimization if memory allocation fails
if (new_ptr) {
reg->alloc = reg->used;
reg->p = new_ptr;
}
}
if (reg->chain) {
reg = reg->chain;
goto resize;
}
}
extern int
onig_bbuf_init(BBuf* buf, OnigDistance 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 = (unsigned int )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, OnigDistance 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;
}
#if 0
static int
add_pointer(regex_t* reg, void* addr)
{
PointerType ptr = (PointerType )addr;
BBUF_ADD(reg, &ptr, SIZE_POINTER);
return 0;
}
#endif
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, OnigDistance 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, OnigDistance byte_len, int ignore_case)
{
int op;
OnigDistance str_len = (byte_len + mb_len - 1) / mb_len;
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, OnigDistance byte_len,
regex_t* reg ARG_UNUSED, int ignore_case)
{
int len;
int op = select_str_opcode(mb_len, byte_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 += (int )byte_len;
return len;
}
static int
add_compile_string(UChar* s, int mb_len, OnigDistance byte_len,
regex_t* reg, int ignore_case)
{
int op = select_str_opcode(mb_len, byte_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, byte_len);
else
add_length(reg, byte_len / mb_len);
}
add_bytes(reg, s, byte_len);
return 0;
}
static int
compile_length_string_node(Node* node, regex_t* reg)
{
int rlen, r, len, prev_len, blen, 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;
blen = prev_len;
rlen = 0;
for (; p < sn->end; ) {
len = enclen(enc, p, sn->end);
if (len == prev_len || ambig) {
blen += len;
}
else {
r = add_compile_string_length(prev, prev_len, blen, reg, ambig);
rlen += r;
prev = p;
blen = len;
prev_len = len;
}
p += len;
}
r = add_compile_string_length(prev, prev_len, blen, 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, blen, 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;
blen = prev_len;
for (; p < end; ) {
len = enclen(enc, p, end);
if (len == prev_len || ambig) {
blen += len;
}
else {
r = add_compile_string(prev, prev_len, blen, reg, ambig);
if (r) return r;
prev = p;
blen = len;
prev_len = len;
}
p += len;
}
return add_compile_string(prev, prev_len, blen, 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_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_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_referred != 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_referred != 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);