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/* $Id: textlist.c,v 1.5 2002/09/24 16:35:02 ukai Exp $ */
#include "textlist.h"
#include "indep.h"
#include "Str.h"
#include "gc.h"
/* General doubly linked list */
ListItem *
newListItem(void *s, ListItem *n, ListItem *p)
{
ListItem *it;
it = New(ListItem);
it->ptr = s;
it->next = n;
it->prev = p;
return it;
}
GeneralList *
newGeneralList()
{
GeneralList *tl = New(GeneralList);
tl->first = tl->last = NULL;
tl->nitem = 0;
return tl;
}
void
pushValue(GeneralList *tl, void *s)
{
ListItem *it;
if (s == NULL)
return;
it = newListItem(s, NULL, tl->last);
if (tl->first == NULL) {
tl->first = it;
tl->last = it;
tl->nitem = 1;
}
else {
tl->last->next = it;
tl->last = it;
tl->nitem++;
}
}
void *
popValue(GeneralList *tl)
{
ListItem *f;
if (tl == NULL || tl->first == NULL)
return NULL;
f = tl->first;
tl->first = f->next;
if (tl->first)
tl->first->prev = NULL;
else
tl->last = NULL;
tl->nitem--;
return f->ptr;
}
void *
rpopValue(GeneralList *tl)
{
ListItem *f;
if (tl == NULL || tl->last == NULL)
return NULL;
f = tl->last;
tl->last = f->prev;
if (tl->last)
tl->last->next = NULL;
else
tl->first = NULL;
tl->nitem--;
return f->ptr;
}
void
delValue(GeneralList *tl, ListItem *it)
{
if (it->prev)
it->prev->next = it->next;
else
tl->first = it->next;
if (it->next)
it->next->prev = it->prev;
else
tl->last = it->prev;
tl->nitem--;
}
GeneralList *
appendGeneralList(GeneralList *tl, GeneralList *tl2)
{
if (tl && tl2) {
if (tl2->first) {
if (tl->last) {
tl->last->next = tl2->first;
tl2->first->prev = tl->last;
tl->last = tl2->last;
tl->nitem += tl2->nitem;
}
else {
tl->first = tl2->first;
tl->last = tl2->last;
tl->nitem = tl2->nitem;
}
}
tl2->first = tl2->last = NULL;
tl2->nitem = 0;
}
return tl;
}
/* Line text list */
TextLine *
newTextLine(Str line, int pos)
{
TextLine *lbuf = New(TextLine);
if (line)
lbuf->line = line;
else
lbuf->line = Strnew();
lbuf->pos = pos;
return lbuf;
}
void
appendTextLine(TextLineList *tl, Str line, int pos)
{
TextLine *lbuf;
if (tl->last == NULL) {
pushTextLine(tl, newTextLine(Strdup(line), pos));
}
else {
lbuf = tl->last->ptr;
if (lbuf->line)
Strcat(lbuf->line, line);
else
lbuf->line = line;
lbuf->pos += pos;
}
}
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