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/*----------------------------------------------------------------------
Compiler Generator Coco/R,
Copyright (c) 1990, 2004 Hanspeter Moessenboeck, University of Linz
extended by M. Loeberbauer & A. Woess, Univ. of Linz
ported to C++ by Csaba Balazs, University of Szeged
with improvements by Pat Terry, Rhodes University
This program is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 2, or (at your option) any
later version.
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
As an exception, it is allowed to write an extension of Coco/R that is
used as a plugin in non-free software.
If not otherwise stated, any source code generated by Coco/R (other than
Coco/R itself) does not fall under the GNU General Public License.
-----------------------------------------------------------------------*/
#include <memory.h>
#include <stdio.h>
#include <stdlib.h>
#include <wchar.h>
#include "CharSet.h"
#include "Scanner.h"
namespace Coco {
bool CharSet::Get(int i) const {
for (CharSet::Range *p = head; p != NULL; p = p->next)
if (i < p->from) return false;
else if (i <= p->to) return true; // p.from <= i <= p.to
return false;
}
void CharSet::Set(int i) {
Range *cur = head, *prev = NULL;
while (cur != NULL && i >= cur->from-1) {
if (i <= cur->to + 1) { // (cur.from-1) <= i <= (cur.to+1)
if (i == cur->from - 1) cur->from--;
else if (i == cur->to + 1) {
cur->to++;
Range *next = cur->next;
if (next != NULL && cur->to == next->from - 1) {
cur->to = next->to;
cur->next = next->next;
delete next;
};
}
return;
}
prev = cur; cur = cur->next;
}
Range *n = new Range(i, i);
n->next = cur;
if (prev == NULL) head = n; else prev->next = n;
}
CharSet* CharSet::Clone() const {
CharSet *s = new CharSet();
Range *prev = NULL;
for (Range *cur = head; cur != NULL; cur = cur->next) {
Range *r = new Range(cur->from, cur->to);
if (prev == NULL) s->head = r; else prev->next = r;
prev = r;
}
return s;
}
bool CharSet::Equals(CharSet *s) const {
Range *p = head, *q = s->head;
while (p != NULL && q != NULL) {
if (p->from != q->from || p->to != q->to) return false;
p = p->next; q = q->next;
}
return p == q;
}
int CharSet::Elements() const {
int n = 0;
for (Range *p = head; p != NULL; p = p->next) n += p->to - p->from + 1;
return n;
}
int CharSet::First() const {
if (head != NULL) return head->from;
return -1;
}
void CharSet::Or(CharSet *s) {
for (Range *p = s->head; p != NULL; p = p->next)
for (int i = p->from; i <= p->to; i++) Set(i);
}
void CharSet::And(CharSet *s) {
CharSet *x = new CharSet();
Range *p = head;
while (p != NULL) {
for (int i = p->from; i <= p->to; i++)
if (s->Get(i)) x->Set(i);
Range *del = p;
p = p->next;
delete del;
}
head = x->head;
x->head = NULL;
delete x;
}
void CharSet::Subtract(CharSet *s) {
CharSet *x = new CharSet();
Range *p = head;
while (p != NULL) {
for (int i = p->from; i <= p->to; i++)
if (!s->Get(i)) x->Set(i);
Range *del = p;
p = p->next;
delete del;
}
head = x->head;
x->head = NULL;
delete x;
}
bool CharSet::Includes(CharSet *s) const {
for (Range *p = s->head; p != NULL; p = p->next)
for (int i = p->from; i <= p->to; i++)
if (!Get(i)) return false;
return true;
}
bool CharSet::Intersects(CharSet *s) const {
for (Range *p = s->head; p != NULL; p = p->next)
for (int i = p->from; i <= p->to; i++)
if (Get(i)) return true;
return false;
}
void CharSet::Clear() {
while (head != NULL) {
Range *del = head;
head = head->next;
delete del;
}
}
void CharSet::Fill() {
Clear();
head = new Range(0, COCO_WCHAR_MAX);
}
CharSet::~CharSet() {
Clear();
}
}
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