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regexec.c
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/**********************************************************************
regexec.c - Onigmo (Oniguruma-mod) (regular expression library)
**********************************************************************/
/*-
* Copyright (c) 2002-2008 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 "regint.h"
#ifdef RUBY
# undef USE_MATCH_RANGE_MUST_BE_INSIDE_OF_SPECIFIED_RANGE
#else
# define USE_MATCH_RANGE_MUST_BE_INSIDE_OF_SPECIFIED_RANGE
#endif
#ifndef USE_TOKEN_THREADED_VM
# ifdef __GNUC__
# define USE_TOKEN_THREADED_VM 1
# else
# define USE_TOKEN_THREADED_VM 0
# endif
#endif
#ifdef RUBY
# define ENC_DUMMY_FLAG (1<<24)
static inline int
rb_enc_asciicompat(OnigEncoding enc)
{
return ONIGENC_MBC_MINLEN(enc)==1 && !((enc)->ruby_encoding_index & ENC_DUMMY_FLAG);
}
# undef ONIGENC_IS_MBC_ASCII_WORD
# define ONIGENC_IS_MBC_ASCII_WORD(enc,s,end) \
(rb_enc_asciicompat(enc) ? (ISALNUM(*s) || *s=='_') : \
onigenc_ascii_is_code_ctype( \
ONIGENC_MBC_TO_CODE(enc,s,end),ONIGENC_CTYPE_WORD,enc))
#endif /* RUBY */
#ifdef USE_CRNL_AS_LINE_TERMINATOR
# define ONIGENC_IS_MBC_CRNL(enc,p,end) \
(ONIGENC_MBC_TO_CODE(enc,p,end) == 13 && \
ONIGENC_MBC_TO_CODE(enc,(p+enclen(enc,p,end)),end) == 10)
# define ONIGENC_IS_MBC_NEWLINE_EX(enc,p,start,end,option,check_prev) \
is_mbc_newline_ex((enc),(p),(start),(end),(option),(check_prev))
static int
is_mbc_newline_ex(OnigEncoding enc, const UChar *p, const UChar *start,
const UChar *end, OnigOptionType option, int check_prev)
{
if (IS_NEWLINE_CRLF(option)) {
if (ONIGENC_MBC_TO_CODE(enc, p, end) == 0x0a) {
if (check_prev) {
const UChar *prev = onigenc_get_prev_char_head(enc, start, p, end);
if ((prev != NULL) && ONIGENC_MBC_TO_CODE(enc, prev, end) == 0x0d)
return 0;
else
return 1;
}
else
return 1;
}
else {
const UChar *pnext = p + enclen(enc, p, end);
if (pnext < end &&
ONIGENC_MBC_TO_CODE(enc, p, end) == 0x0d &&
ONIGENC_MBC_TO_CODE(enc, pnext, end) == 0x0a)
return 1;
if (ONIGENC_IS_MBC_NEWLINE(enc, p, end))
return 1;
return 0;
}
}
else {
return ONIGENC_IS_MBC_NEWLINE(enc, p, end);
}
}
#else /* USE_CRNL_AS_LINE_TERMINATOR */
# define ONIGENC_IS_MBC_NEWLINE_EX(enc,p,start,end,option,check_prev) \
ONIGENC_IS_MBC_NEWLINE((enc), (p), (end))
#endif /* USE_CRNL_AS_LINE_TERMINATOR */
#ifdef USE_CAPTURE_HISTORY
static void history_tree_free(OnigCaptureTreeNode* node);
static void
history_tree_clear(OnigCaptureTreeNode* node)
{
int i;
if (IS_NOT_NULL(node)) {
for (i = 0; i < node->num_childs; i++) {
if (IS_NOT_NULL(node->childs[i])) {
history_tree_free(node->childs[i]);
}
}
for (i = 0; i < node->allocated; i++) {
node->childs[i] = (OnigCaptureTreeNode* )0;
}
node->num_childs = 0;
node->beg = ONIG_REGION_NOTPOS;
node->end = ONIG_REGION_NOTPOS;
node->group = -1;
xfree(node->childs);
node->childs = (OnigCaptureTreeNode** )0;
}
}
static void
history_tree_free(OnigCaptureTreeNode* node)
{
history_tree_clear(node);
xfree(node);
}
static void
history_root_free(OnigRegion* r)
{
if (IS_NOT_NULL(r->history_root)) {
history_tree_free(r->history_root);
r->history_root = (OnigCaptureTreeNode* )0;
}
}
static OnigCaptureTreeNode*
history_node_new(void)
{
OnigCaptureTreeNode* node;
node = (OnigCaptureTreeNode* )xmalloc(sizeof(OnigCaptureTreeNode));
CHECK_NULL_RETURN(node);
node->childs = (OnigCaptureTreeNode** )0;
node->allocated = 0;
node->num_childs = 0;
node->group = -1;
node->beg = ONIG_REGION_NOTPOS;
node->end = ONIG_REGION_NOTPOS;
return node;
}
static int
history_tree_add_child(OnigCaptureTreeNode* parent, OnigCaptureTreeNode* child)
{
# define HISTORY_TREE_INIT_ALLOC_SIZE 8
if (parent->num_childs >= parent->allocated) {
int n, i;
if (IS_NULL(parent->childs)) {
n = HISTORY_TREE_INIT_ALLOC_SIZE;
parent->childs =
(OnigCaptureTreeNode** )xmalloc(sizeof(OnigCaptureTreeNode*) * n);
CHECK_NULL_RETURN_MEMERR(parent->childs);
}
else {
OnigCaptureTreeNode** tmp;
n = parent->allocated * 2;
tmp =
(OnigCaptureTreeNode** )xrealloc(parent->childs,
sizeof(OnigCaptureTreeNode*) * n);
if (tmp == 0) {
history_tree_clear(parent);
return ONIGERR_MEMORY;
}
parent->childs = tmp;
}
for (i = parent->allocated; i < n; i++) {
parent->childs[i] = (OnigCaptureTreeNode* )0;
}
parent->allocated = n;
}
parent->childs[parent->num_childs] = child;
parent->num_childs++;
return 0;
}
static OnigCaptureTreeNode*
history_tree_clone(OnigCaptureTreeNode* node)
{
int i, r;
OnigCaptureTreeNode *clone, *child;
clone = history_node_new();
CHECK_NULL_RETURN(clone);
clone->beg = node->beg;
clone->end = node->end;
for (i = 0; i < node->num_childs; i++) {
child = history_tree_clone(node->childs[i]);
if (IS_NULL(child)) {
history_tree_free(clone);
return (OnigCaptureTreeNode* )0;
}
r = history_tree_add_child(clone, child);
if (r != 0) {
history_tree_free(child);
history_tree_free(clone);
return (OnigCaptureTreeNode* )0;
}
}
return clone;
}
extern OnigCaptureTreeNode*
onig_get_capture_tree(OnigRegion* region)
{
return region->history_root;
}
#endif /* USE_CAPTURE_HISTORY */
#ifdef USE_MATCH_CACHE
/*
Glossary for "match cache"
"match cache" or "match cache optimization"
The `Regexp#match` optimization by using a cache.
"cache opcode"
A cachable opcode (e.g. `OP_PUSH`, `OP_REPEAT`, etc).
It is corresponding to some cache points.
`OP_NULL_CHECK_START` and `OP_NULL_CHECK_END_MEMST` are exceptions.
They are counted as cache opcodes, but they have no corresponding cache points.
They are used for resetting a match cache buffer when a null loop is detected.
"cache point"
A cachable point on matching.
Usually, one-to-one corresponding between a cache opcode and a cache point exists,
but cache opcodes between `OP_REPEAT` and `OP_REPEAT_INC` have some corresponding
cache points depending on repetition counts.
"match cache point"
A pair of a cache point and a position on an input string.
We encode a match cache point to an integer value by the following equation:
"match cache point" = "position on input string" * "total number of cache points" + "cache point"
"match cache buffer"
A bit-array for recording (caching) match cache points once arrived.
*/
/* count the total number of cache opcodes for allocating a match cache buffer. */
static OnigPosition
count_num_cache_opcodes(const regex_t* reg, long* num_cache_opcodes_ptr)
{
UChar* p = reg->p;
UChar* pend = p + reg->used;
LengthType len;
MemNumType repeat_mem;
OnigEncoding enc = reg->enc;
MemNumType current_repeat_mem = -1;
long num_cache_opcodes = 0;
long num_cache_opcodes_at_null_check_start = -1;
while (p < pend) {
switch (*p++) {
case OP_FINISH:
case OP_END:
break;
case OP_EXACT1: p++; break;
case OP_EXACT2: p += 2; break;
case OP_EXACT3: p += 3; break;
case OP_EXACT4: p += 4; break;
case OP_EXACT5: p += 5; break;
case OP_EXACTN:
GET_LENGTH_INC(len, p); p += len; break;
case OP_EXACTMB2N1: p += 2; break;
case OP_EXACTMB2N2: p += 4; break;
case OP_EXACTMB2N3: p += 6; break;
case OP_EXACTMB2N:
GET_LENGTH_INC(len, p); p += len * 2; break;
case OP_EXACTMB3N:
GET_LENGTH_INC(len, p); p += len * 3; break;
case OP_EXACTMBN:
{
int mb_len;
GET_LENGTH_INC(mb_len, p);
GET_LENGTH_INC(len, p);
p += mb_len * len;
}
break;
case OP_EXACT1_IC:
len = enclen(enc, p, pend); p += len; break;
case OP_EXACTN_IC:
GET_LENGTH_INC(len, p); p += len; break;
case OP_CCLASS:
case OP_CCLASS_NOT:
p += SIZE_BITSET; break;
case OP_CCLASS_MB:
case OP_CCLASS_MB_NOT:
GET_LENGTH_INC(len, p); p += len; break;
case OP_CCLASS_MIX:
case OP_CCLASS_MIX_NOT:
p += SIZE_BITSET;
GET_LENGTH_INC(len, p);
p += len;
break;
case OP_ANYCHAR:
case OP_ANYCHAR_ML:
break;
case OP_ANYCHAR_STAR:
case OP_ANYCHAR_ML_STAR:
num_cache_opcodes++;break;
case OP_ANYCHAR_STAR_PEEK_NEXT:
case OP_ANYCHAR_ML_STAR_PEEK_NEXT:
p++; num_cache_opcodes++; break;
case OP_WORD:
case OP_NOT_WORD:
case OP_WORD_BOUND:
case OP_NOT_WORD_BOUND:
case OP_WORD_BEGIN:
case OP_WORD_END:
break;
case OP_ASCII_WORD:
case OP_NOT_ASCII_WORD:
case OP_ASCII_WORD_BOUND:
case OP_NOT_ASCII_WORD_BOUND:
case OP_ASCII_WORD_BEGIN:
case OP_ASCII_WORD_END:
break;
case OP_BEGIN_BUF:
case OP_END_BUF:
case OP_BEGIN_LINE:
case OP_END_LINE:
case OP_SEMI_END_BUF:
case OP_BEGIN_POSITION:
break;
case OP_BACKREF1:
case OP_BACKREF2:
case OP_BACKREFN:
case OP_BACKREFN_IC:
case OP_BACKREF_MULTI:
case OP_BACKREF_MULTI_IC:
case OP_BACKREF_WITH_LEVEL:
goto impossible;
case OP_MEMORY_START:
case OP_MEMORY_START_PUSH:
case OP_MEMORY_END_PUSH:
case OP_MEMORY_END_PUSH_REC:
case OP_MEMORY_END:
case OP_MEMORY_END_REC:
p += SIZE_MEMNUM; break;
case OP_KEEP:
break;
case OP_FAIL:
break;
case OP_JUMP:
p += SIZE_RELADDR;
break;
case OP_PUSH:
p += SIZE_RELADDR;
num_cache_opcodes++;
break;
case OP_POP:
break;
case OP_PUSH_OR_JUMP_EXACT1:
case OP_PUSH_IF_PEEK_NEXT:
p += SIZE_RELADDR + 1; num_cache_opcodes++; break;
case OP_REPEAT:
case OP_REPEAT_NG:
if (current_repeat_mem != -1) {
// A nested OP_REPEAT is not yet supported.
goto impossible;
}
GET_MEMNUM_INC(repeat_mem, p);
p += SIZE_RELADDR;
if (reg->repeat_range[repeat_mem].lower == 0) {
num_cache_opcodes++;
}
current_repeat_mem = repeat_mem;
break;
case OP_REPEAT_INC:
case OP_REPEAT_INC_NG:
GET_MEMNUM_INC(repeat_mem, p);
if (repeat_mem != current_repeat_mem) {
// A lone or invalid OP_REPEAT_INC is found.
goto impossible;
}
{
OnigRepeatRange *repeat_range = ®->repeat_range[repeat_mem];
if (repeat_range->lower < repeat_range->upper) {
num_cache_opcodes++;
}
current_repeat_mem = -1;
}
break;
case OP_REPEAT_INC_SG:
case OP_REPEAT_INC_NG_SG:
goto impossible;
case OP_NULL_CHECK_START:
p += SIZE_MEMNUM;
if (num_cache_opcodes_at_null_check_start != -1) {
// A nested OP_NULL_CHECK_START is not yet supported.
goto impossible;
}
num_cache_opcodes_at_null_check_start = num_cache_opcodes;
break;
case OP_NULL_CHECK_END:
case OP_NULL_CHECK_END_MEMST_PUSH:
p += SIZE_MEMNUM;
num_cache_opcodes_at_null_check_start = -1;
break;
case OP_NULL_CHECK_END_MEMST:
p += SIZE_MEMNUM;
// OP_NULL_CHECK_START and OP_NULL_CHECK_END_MEMST are counted as cache opcodes.
if (num_cache_opcodes_at_null_check_start < num_cache_opcodes) {
num_cache_opcodes += 2;
}
num_cache_opcodes_at_null_check_start = -1;
break;
case OP_PUSH_POS:
case OP_POP_POS:
case OP_PUSH_POS_NOT:
case OP_FAIL_POS:
goto impossible;
case OP_PUSH_STOP_BT:
case OP_POP_STOP_BT:
break;
case OP_LOOK_BEHIND:
case OP_PUSH_LOOK_BEHIND_NOT:
case OP_FAIL_LOOK_BEHIND_NOT:
case OP_PUSH_ABSENT_POS:
case OP_ABSENT_END:
case OP_ABSENT:
goto impossible;
case OP_CALL:
case OP_RETURN:
goto impossible;
case OP_CONDITION:
goto impossible;
case OP_STATE_CHECK_PUSH:
case OP_STATE_CHECK_PUSH_OR_JUMP:
case OP_STATE_CHECK:
case OP_STATE_CHECK_ANYCHAR_STAR:
case OP_STATE_CHECK_ANYCHAR_ML_STAR:
goto impossible;
case OP_SET_OPTION_PUSH:
case OP_SET_OPTION:
p += SIZE_OPTION;
break;
default:
goto bytecode_error;
}
}
*num_cache_opcodes_ptr = num_cache_opcodes;
return 0;
impossible:
*num_cache_opcodes_ptr = NUM_CACHE_OPCODES_IMPOSSIBLE;
return 0;
bytecode_error:
return ONIGERR_UNDEFINED_BYTECODE;
}
/* collect cache opcodes from the given regex program, and compute the total number of cache points. */
static OnigPosition
init_cache_opcodes(const regex_t* reg, OnigCacheOpcode* cache_opcodes, long* num_cache_points_ptr)
{
UChar* pbegin;
UChar* p = reg->p;
UChar* pend = p + reg->used;
LengthType len;
MemNumType repeat_mem;
OnigEncoding enc = reg->enc;
MemNumType current_repeat_mem = -1;
long cache_point = 0;
long num_cache_points_at_repeat = 0;
OnigCacheOpcode* cache_opcodes_at_repeat = NULL;
UChar* null_check_start_addr = NULL;
OnigCacheOpcode* cache_opcodes_at_null_check_start = NULL;
# define INC_CACHE_OPCODES do {\
cache_opcodes->addr = pbegin;\
cache_opcodes->cache_point = cache_point - num_cache_points_at_repeat;\
cache_opcodes->outer_repeat_mem = current_repeat_mem;\
cache_opcodes->num_cache_points_at_outer_repeat = num_cache_points_at_repeat;\
cache_opcodes->num_cache_points_in_outer_repeat = 0;\
cache_point++;\
cache_opcodes++;\
} while (0)
while (p < pend) {
pbegin = p;
switch (*p++) {
case OP_FINISH:
case OP_END:
break;
case OP_EXACT1: p++; break;
case OP_EXACT2: p += 2; break;
case OP_EXACT3: p += 3; break;
case OP_EXACT4: p += 4; break;
case OP_EXACT5: p += 5; break;
case OP_EXACTN:
GET_LENGTH_INC(len, p); p += len; break;
case OP_EXACTMB2N1: p += 2; break;
case OP_EXACTMB2N2: p += 4; break;
case OP_EXACTMB2N3: p += 6; break;
case OP_EXACTMB2N:
GET_LENGTH_INC(len, p); p += len * 2; break;
case OP_EXACTMB3N:
GET_LENGTH_INC(len, p); p += len * 3; break;
case OP_EXACTMBN:
{
int mb_len;
GET_LENGTH_INC(mb_len, p);
GET_LENGTH_INC(len, p);
p += mb_len * len;
}
break;
case OP_EXACT1_IC:
len = enclen(enc, p, pend); p += len; break;
case OP_EXACTN_IC:
GET_LENGTH_INC(len, p); p += len; break;
case OP_CCLASS:
case OP_CCLASS_NOT:
p += SIZE_BITSET; break;
case OP_CCLASS_MB:
case OP_CCLASS_MB_NOT:
GET_LENGTH_INC(len, p); p += len; break;
case OP_CCLASS_MIX:
case OP_CCLASS_MIX_NOT:
p += SIZE_BITSET;
GET_LENGTH_INC(len, p);
p += len;
break;
case OP_ANYCHAR:
case OP_ANYCHAR_ML:
break;
case OP_ANYCHAR_STAR:
case OP_ANYCHAR_ML_STAR:
INC_CACHE_OPCODES;
break;
case OP_ANYCHAR_STAR_PEEK_NEXT:
case OP_ANYCHAR_ML_STAR_PEEK_NEXT:
p++;
INC_CACHE_OPCODES;
break;
case OP_WORD:
case OP_NOT_WORD:
case OP_WORD_BOUND:
case OP_NOT_WORD_BOUND:
case OP_WORD_BEGIN:
case OP_WORD_END:
break;
case OP_ASCII_WORD:
case OP_NOT_ASCII_WORD:
case OP_ASCII_WORD_BOUND:
case OP_NOT_ASCII_WORD_BOUND:
case OP_ASCII_WORD_BEGIN:
case OP_ASCII_WORD_END:
break;
case OP_BEGIN_BUF:
case OP_END_BUF:
case OP_BEGIN_LINE:
case OP_END_LINE:
case OP_SEMI_END_BUF:
case OP_BEGIN_POSITION:
break;
case OP_BACKREF1:
case OP_BACKREF2:
case OP_BACKREFN:
case OP_BACKREFN_IC:
case OP_BACKREF_MULTI:
case OP_BACKREF_MULTI_IC:
case OP_BACKREF_WITH_LEVEL:
goto unexpected_bytecode_error;
case OP_MEMORY_START:
case OP_MEMORY_START_PUSH:
case OP_MEMORY_END_PUSH:
case OP_MEMORY_END_PUSH_REC:
case OP_MEMORY_END:
case OP_MEMORY_END_REC:
p += SIZE_MEMNUM; break;
case OP_KEEP:
break;
case OP_FAIL:
break;
case OP_JUMP:
p += SIZE_RELADDR;
break;
case OP_PUSH:
p += SIZE_RELADDR;
INC_CACHE_OPCODES;
break;
case OP_POP:
break;
case OP_PUSH_OR_JUMP_EXACT1:
case OP_PUSH_IF_PEEK_NEXT:
p += SIZE_RELADDR + 1;
INC_CACHE_OPCODES;
break;
case OP_REPEAT:
case OP_REPEAT_NG:
GET_MEMNUM_INC(repeat_mem, p);
p += SIZE_RELADDR;
if (reg->repeat_range[repeat_mem].lower == 0) {
INC_CACHE_OPCODES;
}
current_repeat_mem = repeat_mem;
num_cache_points_at_repeat = cache_point;
cache_opcodes_at_repeat = cache_opcodes;
break;
case OP_REPEAT_INC:
case OP_REPEAT_INC_NG:
GET_MEMNUM_INC(repeat_mem, p);
{
long num_cache_points_in_repeat = cache_point - num_cache_points_at_repeat;
OnigRepeatRange *repeat_range = ®->repeat_range[repeat_mem];
if (repeat_range->lower < repeat_range->upper) {
INC_CACHE_OPCODES;
cache_point--;
}
cache_point -= num_cache_points_in_repeat;
int repeat_bounds = repeat_range->upper == 0x7fffffff ? 1 : repeat_range->upper - repeat_range->lower;
cache_point += num_cache_points_in_repeat * repeat_range->lower + (num_cache_points_in_repeat + 1) * repeat_bounds;
OnigCacheOpcode* cache_opcodes_in_repeat = cache_opcodes - 1;
while (cache_opcodes_at_repeat <= cache_opcodes_in_repeat) {
cache_opcodes_in_repeat->num_cache_points_in_outer_repeat = num_cache_points_in_repeat;
cache_opcodes_in_repeat--;
}
current_repeat_mem = -1;
num_cache_points_at_repeat = 0;
cache_opcodes_at_repeat = NULL;
}
break;
case OP_REPEAT_INC_SG:
case OP_REPEAT_INC_NG_SG:
goto unexpected_bytecode_error;
case OP_NULL_CHECK_START:
if (cache_opcodes_at_null_check_start != NULL) {
goto unexpected_bytecode_error;
}
p += SIZE_MEMNUM;
null_check_start_addr = pbegin;
cache_opcodes_at_null_check_start = cache_opcodes;
break;
case OP_NULL_CHECK_END:
case OP_NULL_CHECK_END_MEMST_PUSH:
p += SIZE_MEMNUM;
cache_opcodes_at_null_check_start = NULL;
break;
case OP_NULL_CHECK_END_MEMST:
p += SIZE_MEMNUM;
{
if (cache_opcodes_at_null_check_start < cache_opcodes) {
*cache_opcodes = *(cache_opcodes - 1);
cache_opcodes->addr = pbegin;
cache_opcodes++;
long num_cache_opcodes_in_null_check = (cache_opcodes - cache_opcodes_at_null_check_start);
xmemmove(cache_opcodes_at_null_check_start + 1, cache_opcodes_at_null_check_start, sizeof(OnigCacheOpcode) * num_cache_opcodes_in_null_check);
cache_opcodes_at_null_check_start->addr = null_check_start_addr;
cache_opcodes++;
}
cache_opcodes_at_null_check_start = NULL;
}
break;
case OP_PUSH_POS:
case OP_POP_POS:
case OP_PUSH_POS_NOT:
case OP_FAIL_POS:
goto unexpected_bytecode_error;
case OP_PUSH_STOP_BT:
case OP_POP_STOP_BT:
break;
case OP_LOOK_BEHIND:
case OP_PUSH_LOOK_BEHIND_NOT:
case OP_FAIL_LOOK_BEHIND_NOT:
case OP_PUSH_ABSENT_POS:
case OP_ABSENT_END:
case OP_ABSENT:
goto unexpected_bytecode_error;
case OP_CALL:
case OP_RETURN:
goto unexpected_bytecode_error;
case OP_CONDITION:
goto unexpected_bytecode_error;
case OP_STATE_CHECK_PUSH:
case OP_STATE_CHECK_PUSH_OR_JUMP:
case OP_STATE_CHECK:
case OP_STATE_CHECK_ANYCHAR_STAR:
case OP_STATE_CHECK_ANYCHAR_ML_STAR:
goto unexpected_bytecode_error;
case OP_SET_OPTION_PUSH:
case OP_SET_OPTION:
p += SIZE_OPTION;
break;
default:
goto bytecode_error;
}
}
*num_cache_points_ptr = cache_point;
return 0;
unexpected_bytecode_error:
return ONIGERR_UNEXPECTED_BYTECODE;
bytecode_error:
return ONIGERR_UNDEFINED_BYTECODE;
}
#else
static OnigPosition
count_num_cache_opcodes(regex_t* reg, long* num_cache_opcodes)
{
*num_cache_opcodes = NUM_CACHE_OPCODES_IMPOSSIBLE;
return 0;
}
#endif /* USE_MATCH_CACHE */
extern int
onig_check_linear_time(OnigRegexType* reg)
{
long num_cache_opcodes = 0;
count_num_cache_opcodes(reg, &num_cache_opcodes);
return num_cache_opcodes != NUM_CACHE_OPCODES_IMPOSSIBLE;
}
extern void
onig_region_clear(OnigRegion* region)
{
int i;
for (i = 0; i < region->num_regs; i++) {
region->beg[i] = region->end[i] = ONIG_REGION_NOTPOS;
}
#ifdef USE_CAPTURE_HISTORY
history_root_free(region);
#endif
}
extern int
onig_region_resize(OnigRegion* region, int n)
{
region->num_regs = n;
if (n < ONIG_NREGION)
n = ONIG_NREGION;
if (region->allocated == 0) {
region->beg = (OnigPosition* )xmalloc(n * sizeof(OnigPosition));
if (region->beg == 0)
return ONIGERR_MEMORY;
region->end = (OnigPosition* )xmalloc(n * sizeof(OnigPosition));
if (region->end == 0) {
xfree(region->beg);
return ONIGERR_MEMORY;
}
region->allocated = n;
}
else if (region->allocated < n) {
OnigPosition *tmp;
region->allocated = 0;
tmp = (OnigPosition* )xrealloc(region->beg, n * sizeof(OnigPosition));
if (tmp == 0) {
xfree(region->beg);
xfree(region->end);
return ONIGERR_MEMORY;
}
region->beg = tmp;
tmp = (OnigPosition* )xrealloc(region->end, n * sizeof(OnigPosition));
if (tmp == 0) {
xfree(region->beg);
xfree(region->end);
return ONIGERR_MEMORY;
}
region->end = tmp;
region->allocated = n;
}
return 0;
}
static int
onig_region_resize_clear(OnigRegion* region, int n)
{
int r;
r = onig_region_resize(region, n);
if (r != 0) return r;
onig_region_clear(region);
return 0;
}
extern int
onig_region_set(OnigRegion* region, int at, int beg, int end)
{
if (at < 0) return ONIGERR_INVALID_ARGUMENT;
if (at >= region->allocated) {
int r = onig_region_resize(region, at + 1);
if (r < 0) return r;
}
region->beg[at] = beg;
region->end[at] = end;
return 0;
}
extern void
onig_region_init(OnigRegion* region)
{
region->num_regs = 0;
region->allocated = 0;
region->beg = (OnigPosition* )0;
region->end = (OnigPosition* )0;
#ifdef USE_CAPTURE_HISTORY
region->history_root = (OnigCaptureTreeNode* )0;
#endif
}
extern OnigRegion*
onig_region_new(void)
{
OnigRegion* r;
r = (OnigRegion* )xmalloc(sizeof(OnigRegion));
if (r)
onig_region_init(r);
return r;
}
extern void
onig_region_free(OnigRegion* r, int free_self)
{
if (r) {
if (r->allocated > 0) {
if (r->beg) xfree(r->beg);
if (r->end) xfree(r->end);
r->allocated = 0;
}
#ifdef USE_CAPTURE_HISTORY
history_root_free(r);
#endif
if (free_self) xfree(r);
}
}
extern void
onig_region_copy(OnigRegion* to, const OnigRegion* from)
{
#define RREGC_SIZE (sizeof(int) * from->num_regs)
int i, r;
if (to == from) return;
r = onig_region_resize(to, from->num_regs);
if (r) return;
for (i = 0; i < from->num_regs; i++) {
to->beg[i] = from->beg[i];
to->end[i] = from->end[i];
}
to->num_regs = from->num_regs;
#ifdef USE_CAPTURE_HISTORY
history_root_free(to);
if (IS_NOT_NULL(from->history_root)) {
to->history_root = history_tree_clone(from->history_root);
}
#endif
}
/** stack **/
#define INVALID_STACK_INDEX -1
/* stack type */
/* used by normal-POP */
#define STK_ALT 0x0001
#define STK_LOOK_BEHIND_NOT 0x0002
#define STK_POS_NOT 0x0003
/* handled by normal-POP */
#define STK_MEM_START 0x0100
#define STK_MEM_END 0x8200
#define STK_REPEAT_INC 0x0300
#define STK_STATE_CHECK_MARK 0x1000
/* avoided by normal-POP */
#define STK_NULL_CHECK_START 0x3000
#define STK_NULL_CHECK_END 0x5000 /* for recursive call */
#define STK_MEM_END_MARK 0x8400
#define STK_POS 0x0500 /* used when POP-POS */
#define STK_STOP_BT 0x0600 /* mark for "(?>...)" */
#define STK_REPEAT 0x0700
#define STK_CALL_FRAME 0x0800
#define STK_RETURN 0x0900
#define STK_VOID 0x0a00 /* for fill a blank */
#define STK_ABSENT_POS 0x0b00 /* for absent */
#define STK_ABSENT 0x0c00 /* absent inner loop marker */
/* stack type check mask */
#define STK_MASK_POP_USED 0x00ff
#define STK_MASK_TO_VOID_TARGET 0x10ff
#define STK_MASK_MEM_END_OR_MARK 0x8000 /* MEM_END or MEM_END_MARK */
#ifdef USE_MATCH_CACHE
#define MATCH_ARG_INIT_MATCH_CACHE(msa) do {\
(msa).match_cache_status = MATCH_CACHE_STATUS_UNINIT;\
(msa).num_fails = 0;\
(msa).num_cache_opcodes = NUM_CACHE_OPCODES_UNINIT;\
(msa).cache_opcodes = (OnigCacheOpcode*)NULL;\
(msa).num_cache_points = 0;\
(msa).match_cache_buf = (uint8_t*)NULL;\
} while(0)
#define MATCH_ARG_FREE_MATCH_CACHE(msa) do {\
if ((msa).cache_opcodes != NULL) xfree((msa).cache_opcodes);\
if ((msa).match_cache_buf != NULL) xfree((msa).match_cache_buf);\
(msa).cache_opcodes = (OnigCacheOpcode*)NULL;\
(msa).match_cache_buf = (uint8_t*)NULL;\
} while(0)
#else
#define MATCH_ARG_INIT_MATCH_CACHE(msa)
#define MATCH_ARG_FREE_MATCH_CACHE(msa)
#endif
#ifdef USE_FIND_LONGEST_SEARCH_ALL_OF_RANGE
# define MATCH_ARG_INIT(msa, arg_option, arg_region, arg_start, arg_gpos) do {\
(msa).stack_p = (void* )0;\
(msa).options = (arg_option);\
(msa).region = (arg_region);\
(msa).start = (arg_start);\
(msa).gpos = (arg_gpos);\
(msa).best_len = ONIG_MISMATCH;\
(msa).counter = 0;\
(msa).end_time = 0;\
MATCH_ARG_INIT_MATCH_CACHE(msa);\
} while(0)
#else
# define MATCH_ARG_INIT(msa, arg_option, arg_region, arg_start, arg_gpos) do {\
(msa).stack_p = (void* )0;\
(msa).options = (arg_option);\
(msa).region = (arg_region);\
(msa).start = (arg_start);\
(msa).gpos = (arg_gpos);\
(msa).counter = 0;\
(msa).end_time = 0;\
MATCH_ARG_INIT_MATCH_CACHE(msa);\
} while(0)