89 lines
1.4 KiB
C
89 lines
1.4 KiB
C
/*
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* page.c
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*
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* map page numbers to file position
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*/
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#include <X11/Xos.h>
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#include <X11/IntrinsicP.h>
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#include <X11/StringDefs.h>
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#include <stdio.h>
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#include <ctype.h>
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#include "DviP.h"
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#ifdef X_NOT_STDC_ENV
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extern long ftell();
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#endif
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static DviFileMap *
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MapPageNumberToFileMap (dw, number)
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DviWidget dw;
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int number;
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{
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DviFileMap *m;
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for (m = dw->dvi.file_map; m; m=m->next)
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if (m->page_number == number)
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break;
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return m;
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}
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DestroyFileMap (m)
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DviFileMap *m;
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{
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DviFileMap *next;
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for (; m; m = next) {
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next = m->next;
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XtFree ((char *) m);
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}
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}
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ForgetPagePositions (dw)
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DviWidget dw;
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{
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DestroyFileMap (dw->dvi.file_map);
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dw->dvi.file_map = 0;
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}
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RememberPagePosition(dw, number)
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DviWidget dw;
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int number;
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{
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DviFileMap *m;
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if (!(m = MapPageNumberToFileMap (dw, number))) {
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m = (DviFileMap *) XtMalloc (sizeof *m);
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m->page_number = number;
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m->next = dw->dvi.file_map;
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dw->dvi.file_map = m;
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}
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if (dw->dvi.tmpFile)
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m->position = ftell (dw->dvi.tmpFile);
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else
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m->position = ftell (dw->dvi.file);
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}
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SearchPagePosition (dw, number)
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DviWidget dw;
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int number;
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{
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DviFileMap *m;
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if (!(m = MapPageNumberToFileMap (dw, number)))
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return -1;
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return m->position;
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}
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FileSeek(dw, position)
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DviWidget dw;
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long position;
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{
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if (dw->dvi.tmpFile) {
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dw->dvi.readingTmp = 1;
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fseek (dw->dvi.tmpFile, position, 0);
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} else
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fseek (dw->dvi.file, position, 0);
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}
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