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/* $XConsortium: page.c,v 1.5 91/07/26 00:40:20 keith Exp $ */
/* $XFree86: xc/programs/xditview/page.c,v 1.4 2001/08/27 23:35:12 dawes Exp $ */
/*
* page.c
*
* map page numbers to file position
*/
#include <X11/IntrinsicP.h>
#include <X11/StringDefs.h>
#include <X11/Xos.h>
#include <stdio.h>
#include <ctype.h>
#include "DviP.h"
static DviFileMap *
MapPageNumberToFileMap (DviWidget dw, int number)
{
DviFileMap *m;
for (m = dw->dvi.file_map; m; m=m->next)
if (m->page_number == number)
break;
return m;
}
void
DestroyFileMap (m)
DviFileMap *m;
{
DviFileMap *next;
for (; m; m = next) {
next = m->next;
XtFree ((char *) m);
}
}
void
ForgetPagePositions (dw)
DviWidget dw;
{
DestroyFileMap (dw->dvi.file_map);
dw->dvi.file_map = 0;
}
void
RememberPagePosition(dw, number)
DviWidget dw;
int number;
{
DviFileMap *m;
if (!(m = MapPageNumberToFileMap (dw, number))) {
m = (DviFileMap *) XtMalloc (sizeof *m);
m->page_number = number;
m->next = dw->dvi.file_map;
dw->dvi.file_map = m;
}
if (dw->dvi.tmpFile)
m->position = ftell (dw->dvi.tmpFile);
else
m->position = ftell (dw->dvi.file);
}
long
SearchPagePosition (dw, number)
DviWidget dw;
int number;
{
DviFileMap *m;
if (!(m = MapPageNumberToFileMap (dw, number)))
return -1;
return m->position;
}
void
FileSeek(dw, position)
DviWidget dw;
long position;
{
if (dw->dvi.tmpFile) {
dw->dvi.readingTmp = 1;
fseek (dw->dvi.tmpFile, position, 0);
} else
fseek (dw->dvi.file, position, 0);
}
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