mirror of
https://github.com/ZDoom/gzdoom.git
synced 2024-11-15 17:02:05 +00:00
748d7bf4b1
- Fixed: Although TypeInfos are now deleted at exit, their FlatPointers or ActorInfo data was not freed. I chose not to use a destructor to handle this, because then it would no longer be a POD type that can be statically initialized. - Fixed: Aliases were not deleted at exit. - Fixed: FWadCollection did not free its hash tables, lump info, full names, or the list of open files when destroyed. SVN r85 (trunk)
568 lines
11 KiB
C++
568 lines
11 KiB
C++
/* $Id: actions.cc,v 1.5 2004/05/13 02:58:17 nuffer Exp $ */
|
|
#include <time.h>
|
|
#include <string.h>
|
|
#include <iostream>
|
|
#include <iomanip>
|
|
|
|
#include "globals.h"
|
|
#include "parser.h"
|
|
#include "dfa.h"
|
|
|
|
Symbol *Symbol::first = NULL;
|
|
|
|
Symbol::Symbol(const SubStr &str) : next(first), name(str), re(NULL) {
|
|
first = this;
|
|
}
|
|
|
|
Symbol *Symbol::find(const SubStr &str){
|
|
for(Symbol *sym = first; sym; sym = sym->next)
|
|
if(sym->name == str) return sym;
|
|
return new Symbol(str);
|
|
}
|
|
|
|
void showIns(std::ostream &o, const Ins &i, const Ins &base){
|
|
o.width(3);
|
|
o << &i - &base << ": ";
|
|
switch(i.i.tag){
|
|
case CHAR: {
|
|
o << "match ";
|
|
for(const Ins *j = &(&i)[1]; j < (Ins*) i.i.link; ++j)
|
|
prtCh(o, (const uchar)j->c.value);
|
|
break;
|
|
} case GOTO:
|
|
o << "goto " << ((Ins*) i.i.link - &base);
|
|
break;
|
|
case FORK:
|
|
o << "fork " << ((Ins*) i.i.link - &base);
|
|
break;
|
|
case CTXT:
|
|
o << "term " << ((RuleOp*) i.i.link)->accept;
|
|
break;
|
|
case TERM:
|
|
o << "term " << ((RuleOp*) i.i.link)->accept;
|
|
break;
|
|
}
|
|
o << "\n";
|
|
}
|
|
|
|
uint RegExp::fixedLength(){
|
|
return ~0;
|
|
}
|
|
|
|
char *NullOp::type = "NullOp";
|
|
|
|
void NullOp::calcSize(Char*){
|
|
size = 0;
|
|
}
|
|
|
|
uint NullOp::fixedLength(){
|
|
return 0;
|
|
}
|
|
|
|
void NullOp::compile(Char*, Ins*){
|
|
;
|
|
}
|
|
|
|
void NullOp::split(CharSet&){
|
|
;
|
|
}
|
|
|
|
std::ostream& operator<<(std::ostream &o, const Range &r){
|
|
if((r.ub - r.lb) == 1){
|
|
prtCh(o, r.lb);
|
|
} else {
|
|
prtCh(o, r.lb); o << "-"; prtCh(o, r.ub-1);
|
|
}
|
|
return o << r.next;
|
|
}
|
|
|
|
Range *doUnion(Range *r1, Range *r2){
|
|
Range *r, **rP = &r;
|
|
for(;;){
|
|
Range *s;
|
|
if(r1->lb <= r2->lb){
|
|
s = new Range(*r1);
|
|
} else {
|
|
s = new Range(*r2);
|
|
}
|
|
*rP = s;
|
|
rP = &s->next;
|
|
for(;;){
|
|
if(r1->lb <= r2->lb){
|
|
if(r1->lb > s->ub)
|
|
break;
|
|
if(r1->ub > s->ub)
|
|
s->ub = r1->ub;
|
|
if(!(r1 = r1->next)){
|
|
uint ub = 0;
|
|
for(; r2 && r2->lb <= s->ub; r2 = r2->next)
|
|
ub = r2->ub;
|
|
if(ub > s->ub)
|
|
s->ub = ub;
|
|
*rP = r2;
|
|
return r;
|
|
}
|
|
} else {
|
|
if(r2->lb > s->ub)
|
|
break;
|
|
if(r2->ub > s->ub)
|
|
s->ub = r2->ub;
|
|
if(!(r2 = r2->next)){
|
|
uint ub = 0;
|
|
for(; r1 && r1->lb <= s->ub; r1 = r1->next)
|
|
ub = r1->ub;
|
|
if(ub > s->ub)
|
|
s->ub = ub;
|
|
*rP = r1;
|
|
return r;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
*rP = NULL;
|
|
return r;
|
|
}
|
|
|
|
Range *doDiff(Range *r1, Range *r2){
|
|
Range *r, *s, **rP = &r;
|
|
for(; r1; r1 = r1->next){
|
|
uint lb = r1->lb;
|
|
for(; r2 && r2->ub <= r1->lb; r2 = r2->next);
|
|
for(; r2 && r2->lb < r1->ub; r2 = r2->next){
|
|
if(lb < r2->lb){
|
|
*rP = s = new Range(lb, r2->lb);
|
|
rP = &s->next;
|
|
}
|
|
if((lb = r2->ub) >= r1->ub)
|
|
goto noMore;
|
|
}
|
|
*rP = s = new Range(lb, r1->ub);
|
|
rP = &s->next;
|
|
noMore:;
|
|
}
|
|
*rP = NULL;
|
|
return r;
|
|
}
|
|
|
|
MatchOp *merge(MatchOp *m1, MatchOp *m2){
|
|
if(!m1)
|
|
return m2;
|
|
if(!m2)
|
|
return m1;
|
|
return new MatchOp(doUnion(m1->match, m2->match));
|
|
}
|
|
|
|
char *MatchOp::type = "MatchOp";
|
|
|
|
void MatchOp::display(std::ostream &o) const{
|
|
o << match;
|
|
}
|
|
|
|
void MatchOp::calcSize(Char *rep){
|
|
size = 1;
|
|
for(Range *r = match; r; r = r->next)
|
|
for(uint c = r->lb; c < r->ub; ++c)
|
|
if(rep[c] == c)
|
|
++size;
|
|
}
|
|
|
|
uint MatchOp::fixedLength(){
|
|
return 1;
|
|
}
|
|
|
|
void MatchOp::compile(Char *rep, Ins *i){
|
|
i->i.tag = CHAR;
|
|
i->i.link = &i[size];
|
|
Ins *j = &i[1];
|
|
uint bump = size;
|
|
for(Range *r = match; r; r = r->next){
|
|
for(uint c = r->lb; c < r->ub; ++c){
|
|
if(rep[c] == c){
|
|
j->c.value = c;
|
|
j->c.bump = --bump;
|
|
j++;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void MatchOp::split(CharSet &s){
|
|
for(Range *r = match; r; r = r->next){
|
|
for(uint c = r->lb; c < r->ub; ++c){
|
|
CharPtn *x = s.rep[c], *a = x->nxt;
|
|
if(!a){
|
|
if(x->card == 1)
|
|
continue;
|
|
x->nxt = a = s.freeHead;
|
|
if(!(s.freeHead = s.freeHead->nxt))
|
|
s.freeTail = &s.freeHead;
|
|
a->nxt = NULL;
|
|
x->fix = s.fix;
|
|
s.fix = x;
|
|
}
|
|
if(--(x->card) == 0){
|
|
*s.freeTail = x;
|
|
*(s.freeTail = &x->nxt) = NULL;
|
|
}
|
|
s.rep[c] = a;
|
|
++(a->card);
|
|
}
|
|
}
|
|
for(; s.fix; s.fix = s.fix->fix)
|
|
if(s.fix->card)
|
|
s.fix->nxt = NULL;
|
|
}
|
|
|
|
RegExp *mkDiff(RegExp *e1, RegExp *e2){
|
|
MatchOp *m1, *m2;
|
|
if(!(m1 = (MatchOp*) e1->isA(MatchOp::type)))
|
|
return NULL;
|
|
if(!(m2 = (MatchOp*) e2->isA(MatchOp::type)))
|
|
return NULL;
|
|
Range *r = doDiff(m1->match, m2->match);
|
|
return r? (RegExp*) new MatchOp(r) : (RegExp*) new NullOp;
|
|
}
|
|
|
|
RegExp *doAlt(RegExp *e1, RegExp *e2){
|
|
if(!e1)
|
|
return e2;
|
|
if(!e2)
|
|
return e1;
|
|
return new AltOp(e1, e2);
|
|
}
|
|
|
|
RegExp *mkAlt(RegExp *e1, RegExp *e2){
|
|
AltOp *a;
|
|
MatchOp *m1, *m2;
|
|
if((a = (AltOp*) e1->isA(AltOp::type))){
|
|
if((m1 = (MatchOp*) a->exp1->isA(MatchOp::type)))
|
|
e1 = a->exp2;
|
|
} else if((m1 = (MatchOp*) e1->isA(MatchOp::type))){
|
|
e1 = NULL;
|
|
}
|
|
if((a = (AltOp*) e2->isA(AltOp::type))){
|
|
if((m2 = (MatchOp*) a->exp1->isA(MatchOp::type)))
|
|
e2 = a->exp2;
|
|
} else if((m2 = (MatchOp*) e2->isA(MatchOp::type))){
|
|
e2 = NULL;
|
|
}
|
|
return doAlt(merge(m1, m2), doAlt(e1, e2));
|
|
}
|
|
|
|
char *AltOp::type = "AltOp";
|
|
|
|
void AltOp::calcSize(Char *rep){
|
|
exp1->calcSize(rep);
|
|
exp2->calcSize(rep);
|
|
size = exp1->size + exp2->size + 2;
|
|
}
|
|
|
|
uint AltOp::fixedLength(){
|
|
uint l1 = exp1->fixedLength();
|
|
uint l2 = exp1->fixedLength();
|
|
if(l1 != l2 || l1 == ~0u)
|
|
return ~0;
|
|
return l1;
|
|
}
|
|
|
|
void AltOp::compile(Char *rep, Ins *i){
|
|
i->i.tag = FORK;
|
|
Ins *j = &i[exp1->size + 1];
|
|
i->i.link = &j[1];
|
|
exp1->compile(rep, &i[1]);
|
|
j->i.tag = GOTO;
|
|
j->i.link = &j[exp2->size + 1];
|
|
exp2->compile(rep, &j[1]);
|
|
}
|
|
|
|
void AltOp::split(CharSet &s){
|
|
exp1->split(s);
|
|
exp2->split(s);
|
|
}
|
|
|
|
char *CatOp::type = "CatOp";
|
|
|
|
void CatOp::calcSize(Char *rep){
|
|
exp1->calcSize(rep);
|
|
exp2->calcSize(rep);
|
|
size = exp1->size + exp2->size;
|
|
}
|
|
|
|
uint CatOp::fixedLength(){
|
|
uint l1, l2;
|
|
if((l1 = exp1->fixedLength()) != ~0u )
|
|
if((l2 = exp2->fixedLength()) != ~0u)
|
|
return l1+l2;
|
|
return ~0;
|
|
}
|
|
|
|
void CatOp::compile(Char *rep, Ins *i){
|
|
exp1->compile(rep, &i[0]);
|
|
exp2->compile(rep, &i[exp1->size]);
|
|
}
|
|
|
|
void CatOp::split(CharSet &s){
|
|
exp1->split(s);
|
|
exp2->split(s);
|
|
}
|
|
|
|
char *CloseOp::type = "CloseOp";
|
|
|
|
void CloseOp::calcSize(Char *rep){
|
|
exp->calcSize(rep);
|
|
size = exp->size + 1;
|
|
}
|
|
|
|
void CloseOp::compile(Char *rep, Ins *i){
|
|
exp->compile(rep, &i[0]);
|
|
i += exp->size;
|
|
i->i.tag = FORK;
|
|
i->i.link = i - exp->size;
|
|
}
|
|
|
|
void CloseOp::split(CharSet &s){
|
|
exp->split(s);
|
|
}
|
|
|
|
char *CloseVOp::type = "CloseVOp";
|
|
|
|
void CloseVOp::calcSize(Char *rep){
|
|
exp->calcSize(rep);
|
|
if(max >= 0)
|
|
size = (exp->size * min) + ((1 + exp->size) * (max - min));
|
|
else
|
|
size = (exp->size * min) + 1;
|
|
}
|
|
|
|
void CloseVOp::compile(Char *rep, Ins *i){
|
|
Ins *jumppoint;
|
|
int st = 0;
|
|
jumppoint = i + ((1 + exp->size) * (max - min));
|
|
for(st = min; st < max; st++) {
|
|
i->i.tag = FORK;
|
|
i->i.link = jumppoint;
|
|
i+=1;
|
|
exp->compile(rep, &i[0]);
|
|
i += exp->size;
|
|
}
|
|
for(st = 0; st < min; st++) {
|
|
exp->compile(rep, &i[0]);
|
|
i += exp->size;
|
|
if(max < 0 && st == 0) {
|
|
i->i.tag = FORK;
|
|
i->i.link = i - exp->size;
|
|
i++;
|
|
}
|
|
}
|
|
}
|
|
|
|
void CloseVOp::split(CharSet &s){
|
|
exp->split(s);
|
|
}
|
|
|
|
RegExp *expr(Scanner &);
|
|
|
|
uchar unescape(SubStr &s){
|
|
s.len--;
|
|
uchar c;
|
|
if((c = *s.str++) != '\\' || s.len == 0)
|
|
return xlat[c];
|
|
s.len--;
|
|
switch(c = *s.str++){
|
|
case 'n':
|
|
return xlat['\n'];
|
|
case 't':
|
|
return xlat['\t'];
|
|
case 'v':
|
|
return xlat['\v'];
|
|
case 'b':
|
|
return xlat['\b'];
|
|
case 'r':
|
|
return xlat['\r'];
|
|
case 'f':
|
|
return xlat['\f'];
|
|
case 'a':
|
|
return xlat['\a'];
|
|
case '0': case '1': case '2': case '3':
|
|
case '4': case '5': case '6': case '7': {
|
|
uchar v = c - '0';
|
|
for(; s.len != 0 && '0' <= (c = *s.str) && c <= '7'; s.len--, s.str++)
|
|
v = v*8 + (c - '0');
|
|
return v;
|
|
} default:
|
|
return xlat[c];
|
|
}
|
|
}
|
|
|
|
Range *getRange(SubStr &s){
|
|
uchar lb = unescape(s), ub;
|
|
if(s.len < 2 || *s.str != '-'){
|
|
ub = lb;
|
|
} else {
|
|
s.len--; s.str++;
|
|
ub = unescape(s);
|
|
if(ub < lb){
|
|
uchar tmp;
|
|
tmp = lb; lb = ub; ub = tmp;
|
|
}
|
|
}
|
|
return new Range(lb, ub+1);
|
|
}
|
|
|
|
RegExp *matchChar(uint c){
|
|
return new MatchOp(new Range(c, c+1));
|
|
}
|
|
|
|
RegExp *strToRE(SubStr s){
|
|
s.len -= 2; s.str += 1;
|
|
if(s.len == 0)
|
|
return new NullOp;
|
|
RegExp *re = matchChar(unescape(s));
|
|
while(s.len > 0)
|
|
re = new CatOp(re, matchChar(unescape(s)));
|
|
return re;
|
|
}
|
|
|
|
RegExp *strToCaseInsensitiveRE(SubStr s){
|
|
s.len -= 2; s.str += 1;
|
|
if(s.len == 0)
|
|
return new NullOp;
|
|
uchar c = unescape(s);
|
|
RegExp *re, *reL, *reU;
|
|
if ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z')) {
|
|
reL = matchChar(tolower(c));
|
|
reU = matchChar(toupper(c));
|
|
re = mkAlt(reL, reU);
|
|
} else {
|
|
re = matchChar(c);
|
|
}
|
|
while(s.len > 0) {
|
|
uchar c = unescape(s);
|
|
if ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z')) {
|
|
reL = matchChar(tolower(c));
|
|
reU = matchChar(toupper(c));
|
|
re = new CatOp(re, mkAlt(reL, reU));
|
|
} else {
|
|
re = new CatOp(re, matchChar(c));
|
|
}
|
|
}
|
|
return re;
|
|
}
|
|
|
|
RegExp *ranToRE(SubStr s){
|
|
s.len -= 2; s.str += 1;
|
|
if(s.len == 0)
|
|
return new NullOp;
|
|
Range *r = getRange(s);
|
|
while(s.len > 0)
|
|
r = doUnion(r, getRange(s));
|
|
return new MatchOp(r);
|
|
}
|
|
|
|
char *RuleOp::type = "RuleOp";
|
|
|
|
RuleOp::RuleOp(RegExp *e, RegExp *c, Token *t, uint a)
|
|
: exp(e), ctx(c), ins(NULL), accept(a), code(t) {
|
|
;
|
|
}
|
|
|
|
void RuleOp::calcSize(Char *rep){
|
|
exp->calcSize(rep);
|
|
ctx->calcSize(rep);
|
|
size = exp->size + ctx->size + 1;
|
|
}
|
|
|
|
void RuleOp::compile(Char *rep, Ins *i){
|
|
ins = i;
|
|
exp->compile(rep, &i[0]);
|
|
i += exp->size;
|
|
ctx->compile(rep, &i[0]);
|
|
i += ctx->size;
|
|
i->i.tag = TERM;
|
|
i->i.link = this;
|
|
}
|
|
|
|
void RuleOp::split(CharSet &s){
|
|
exp->split(s);
|
|
ctx->split(s);
|
|
}
|
|
|
|
extern void printSpan(std::ostream&, uint, uint);
|
|
|
|
void optimize(Ins *i){
|
|
while(!isMarked(i)){
|
|
mark(i);
|
|
if(i->i.tag == CHAR){
|
|
i = (Ins*) i->i.link;
|
|
} else if(i->i.tag == GOTO || i->i.tag == FORK){
|
|
Ins *target = (Ins*) i->i.link;
|
|
optimize(target);
|
|
if(target->i.tag == GOTO)
|
|
i->i.link = target->i.link == target? i : target;
|
|
if(i->i.tag == FORK){
|
|
Ins *follow = (Ins*) &i[1];
|
|
optimize(follow);
|
|
if(follow->i.tag == GOTO && follow->i.link == follow){
|
|
i->i.tag = GOTO;
|
|
} else if(i->i.link == i){
|
|
i->i.tag = GOTO;
|
|
i->i.link = follow;
|
|
}
|
|
}
|
|
return;
|
|
} else {
|
|
++i;
|
|
}
|
|
}
|
|
}
|
|
|
|
void genCode(std::ostream& o, RegExp *re){
|
|
CharSet cs;
|
|
uint j;
|
|
memset(&cs, 0, sizeof(cs));
|
|
for(j = 0; j < nChars; ++j){
|
|
cs.rep[j] = &cs.ptn[0];
|
|
cs.ptn[j].nxt = &cs.ptn[j+1];
|
|
}
|
|
cs.freeHead = &cs.ptn[1];
|
|
*(cs.freeTail = &cs.ptn[nChars-1].nxt) = NULL;
|
|
cs.ptn[0].card = nChars;
|
|
cs.ptn[0].nxt = NULL;
|
|
re->split(cs);
|
|
/*
|
|
for(uint k = 0; k < nChars;){
|
|
for(j = k; ++k < nChars && cs.rep[k] == cs.rep[j];);
|
|
printSpan(cerr, j, k);
|
|
cerr << "\t" << cs.rep[j] - &cs.ptn[0] << endl;
|
|
}
|
|
*/
|
|
Char rep[nChars];
|
|
for(j = 0; j < nChars; ++j){
|
|
if(!cs.rep[j]->nxt)
|
|
cs.rep[j]->nxt = &cs.ptn[j];
|
|
rep[j] = (Char) (cs.rep[j]->nxt - &cs.ptn[0]);
|
|
}
|
|
|
|
re->calcSize(rep);
|
|
Ins *ins = new Ins[re->size+1];
|
|
memset(ins, 0, (re->size+1)*sizeof(Ins));
|
|
re->compile(rep, ins);
|
|
Ins *eoi = &ins[re->size];
|
|
eoi->i.tag = GOTO;
|
|
eoi->i.link = eoi;
|
|
|
|
optimize(ins);
|
|
for(j = 0; j < re->size;){
|
|
unmark(&ins[j]);
|
|
if(ins[j].i.tag == CHAR){
|
|
j = (Ins*) ins[j].i.link - ins;
|
|
} else {
|
|
j++;
|
|
}
|
|
}
|
|
|
|
DFA *dfa = new DFA(ins, re->size, 0, 256, rep);
|
|
dfa->emit(o);
|
|
delete dfa;
|
|
delete [] ins;
|
|
}
|