106 lines
2.1 KiB
C
106 lines
2.1 KiB
C
#include <limits.h>
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#include <string.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <QF/qendian.h>
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#include "pakfile.h"
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static const char *
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pack_get_key (void *p, void *unused)
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{
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return ((dpackfile_t *) p)->name;
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}
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pack_t *
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pack_new (const char *name)
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{
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pack_t *pack = calloc (sizeof (*pack), 1);
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if (!pack)
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return 0;
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pack->filename = strdup (name);
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if (!pack->filename) {
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free (pack);
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return 0;
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}
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pack->file_hash = Hash_NewTable (1021, pack_get_key, 0, 0);
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if (!pack->file_hash) {
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free (pack->filename);
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free (pack);
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return 0;
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}
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return pack;
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}
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void
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pack_del (pack_t *pack)
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{
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if (pack->files)
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free (pack->files);
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if (pack->handle)
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fclose (pack->handle);
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if (pack->filename)
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free (pack->filename);
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if (pack->file_hash)
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free (pack->file_hash);
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free (pack);
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}
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pack_t *
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pack_open (const char *name)
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{
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dpackheader_t header;
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pack_t *pack = pack_new (name);
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int i;
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if (!pack)
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return 0;
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pack->handle = fopen (name, "rb");
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if (!pack->handle) {
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goto error;
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}
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if (fread (&header, 1, sizeof (header), pack->handle) != sizeof (header)) {
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fprintf (stderr, "%s: not a pack file", name);
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goto error;
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}
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if (strncmp (header.id, "PACK", 4)) {
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fprintf (stderr, "%s: not a pack file", name);
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goto error;
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}
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header.dirofs = LittleLong (header.dirofs);
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header.dirlen = LittleLong (header.dirlen);
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pack->numfiles = header.dirlen / sizeof (dpackfile_t);
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pack->files_size = pack->numfiles;
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if (pack->numfiles > MAX_FILES_IN_PACK) {
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fprintf (stderr, "%s: too many files in pack: %d", name, pack->numfiles);
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goto error;
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}
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pack->files = malloc (pack->files_size * sizeof (dpackfile_t));
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if (!pack->files) {
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fprintf (stderr, "out of memory\n");
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goto error;
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}
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fseek (pack->handle, header.dirofs, SEEK_SET);
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fread (pack->files, pack->numfiles, sizeof (pack->files[0]), pack->handle);
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for (i = 0; i < pack->numfiles; i++) {
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pack->files[i].filepos = LittleLong (pack->files[i].filepos);
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pack->files[i].filelen = LittleLong (pack->files[i].filelen);
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Hash_Add (pack->file_hash, &pack->files[i]);
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}
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return pack;
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error:
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pack_del (pack);
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return 0;
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}
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void
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pack_close (pack_t *pack)
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{
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pack_del (pack);
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}
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