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/*
* Copyright 2007-2018 Adrian Thurston <thurston@colm.net>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include <stdbool.h>
#include <assert.h>
#include "redfsm.h"
#include "compiler.h"
void execAction( struct pda_run *pdaRun, GenAction *genAction )
{
for ( InlineList::Iter item = *genAction->inlineList; item.lte(); item++ ) {
switch ( item->type ) {
case InlineItem::Text:
assert(false);
break;
case InlineItem::LmSetActId:
pdaRun->act = item->longestMatchPart->longestMatchId;
break;
case InlineItem::LmSetTokEnd:
pdaRun->tokend = pdaRun->tokpref + ( pdaRun->p - pdaRun->start ) + 1;
break;
case InlineItem::LmInitTokStart:
assert(false);
break;
case InlineItem::LmInitAct:
pdaRun->act = 0;
break;
case InlineItem::LmSetTokStart:
pdaRun->tokstart = pdaRun->p;
break;
case InlineItem::LmSwitch:
/* If the switch handles error then we also forced the error state. It
* will exist. */
if ( item->tokenRegion->lmSwitchHandlesError && pdaRun->act == 0 ) {
pdaRun->fsm_cs = pdaRun->fsm_tables->error_state;
}
else {
for ( TokenInstanceListReg::Iter lmi = item->tokenRegion->tokenInstanceList;
lmi.lte(); lmi++ )
{
if ( lmi->inLmSelect && pdaRun->act == lmi->longestMatchId )
pdaRun->matched_token = lmi->tokenDef->tdLangEl->id;
}
}
pdaRun->return_result = true;
pdaRun->skip_tokpref = true;
break;
case InlineItem::LmOnLast:
pdaRun->p += 1;
pdaRun->tokend = pdaRun->tokpref + ( pdaRun->p - pdaRun->start );
pdaRun->matched_token = item->longestMatchPart->tokenDef->tdLangEl->id;
pdaRun->return_result = true;
break;
case InlineItem::LmOnNext:
pdaRun->tokend = pdaRun->tokpref + ( pdaRun->p - pdaRun->start );
pdaRun->matched_token = item->longestMatchPart->tokenDef->tdLangEl->id;
pdaRun->return_result = true;
break;
case InlineItem::LmOnLagBehind:
pdaRun->matched_token = item->longestMatchPart->tokenDef->tdLangEl->id;
pdaRun->return_result = true;
pdaRun->skip_tokpref = true;
break;
}
}
if ( genAction->markType == MarkMark )
pdaRun->mark[genAction->markId-1] = pdaRun->p;
}
extern "C" void internalFsmExecute( struct pda_run *pdaRun, struct input_impl *inputStream )
{
int _klen;
unsigned int _trans;
const long *_acts;
unsigned int _nacts;
const char *_keys;
pdaRun->start = pdaRun->p;
/* Init the token match to nothing (the sentinal). */
pdaRun->matched_token = 0;
/*_resume:*/
if ( pdaRun->fsm_cs == pdaRun->fsm_tables->error_state )
goto out;
if ( pdaRun->p == pdaRun->pe )
goto out;
_loop_head:
_acts = pdaRun->fsm_tables->actions + pdaRun->fsm_tables->from_state_actions[pdaRun->fsm_cs];
_nacts = (unsigned int) *_acts++;
while ( _nacts-- > 0 )
execAction( pdaRun, pdaRun->fsm_tables->action_switch[*_acts++] );
_keys = pdaRun->fsm_tables->trans_keys + pdaRun->fsm_tables->key_offsets[pdaRun->fsm_cs];
_trans = pdaRun->fsm_tables->index_offsets[pdaRun->fsm_cs];
_klen = pdaRun->fsm_tables->single_lengths[pdaRun->fsm_cs];
if ( _klen > 0 ) {
const char *_lower = _keys;
const char *_mid;
const char *_upper = _keys + _klen - 1;
while (1) {
if ( _upper < _lower )
break;
_mid = _lower + ((_upper-_lower) >> 1);
if ( (*pdaRun->p) < *_mid )
_upper = _mid - 1;
else if ( (*pdaRun->p) > *_mid )
_lower = _mid + 1;
else {
_trans += (_mid - _keys);
goto _match;
}
}
_keys += _klen;
_trans += _klen;
}
_klen = pdaRun->fsm_tables->range_lengths[pdaRun->fsm_cs];
if ( _klen > 0 ) {
const char *_lower = _keys;
const char *_mid;
const char *_upper = _keys + (_klen<<1) - 2;
while (1) {
if ( _upper < _lower )
break;
_mid = _lower + (((_upper-_lower) >> 1) & ~1);
if ( (*pdaRun->p) < _mid[0] )
_upper = _mid - 2;
else if ( (*pdaRun->p) > _mid[1] )
_lower = _mid + 2;
else {
_trans += ((_mid - _keys)>>1);
goto _match;
}
}
_trans += _klen;
}
_match:
pdaRun->fsm_cs = pdaRun->fsm_tables->transTargsWI[_trans];
if ( pdaRun->fsm_tables->transActionsWI[_trans] == 0 )
goto _again;
pdaRun->return_result = false;
pdaRun->skip_tokpref = false;
_acts = pdaRun->fsm_tables->actions + pdaRun->fsm_tables->transActionsWI[_trans];
_nacts = (unsigned int) *_acts++;
while ( _nacts-- > 0 )
execAction( pdaRun, pdaRun->fsm_tables->action_switch[*_acts++] );
if ( pdaRun->return_result ) {
if ( pdaRun->skip_tokpref )
goto skip_tokpref;
goto final;
}
_again:
_acts = pdaRun->fsm_tables->actions + pdaRun->fsm_tables->to_state_actions[pdaRun->fsm_cs];
_nacts = (unsigned int) *_acts++;
while ( _nacts-- > 0 )
execAction( pdaRun, pdaRun->fsm_tables->action_switch[*_acts++] );
if ( pdaRun->fsm_cs == pdaRun->fsm_tables->error_state )
goto out;
if ( ++pdaRun->p != pdaRun->pe )
goto _loop_head;
out:
if ( pdaRun->scan_eof ) {
pdaRun->return_result = false;
pdaRun->skip_tokpref = false;
_acts = pdaRun->fsm_tables->actions + pdaRun->fsm_tables->eof_actions[pdaRun->fsm_cs];
_nacts = (unsigned int) *_acts++;
if ( pdaRun->fsm_tables->eof_targs[pdaRun->fsm_cs] >= 0 )
pdaRun->fsm_cs = pdaRun->fsm_tables->eof_targs[pdaRun->fsm_cs];
while ( _nacts-- > 0 )
execAction( pdaRun, pdaRun->fsm_tables->action_switch[*_acts++] );
if ( pdaRun->return_result ) {
if ( pdaRun->skip_tokpref )
goto skip_tokpref;
goto final;
}
}
final:
if ( pdaRun->p != 0 )
pdaRun->tokpref += pdaRun->p - pdaRun->start;
skip_tokpref:
{}
}
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