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https://github.com/kichikuou/xsystem35-sdl2.git
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75 lines
1.9 KiB
C
75 lines
1.9 KiB
C
/*
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* alk.c ALK archive manager
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*
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* Copyright (C) 1997-1998 Masaki Chikama (Wren) <chikama@kasumi.ipl.mech.nagoya-u.ac.jp>
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* 1998- <masaki-c@is.aist-nara.ac.jp>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* @version 1.0 01/11/29 initial version
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*/
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/* $Id: alk.c,v 1.2 2003/01/12 10:48:50 chikama Exp $ */
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#include "config.h"
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include "portab.h"
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#include "system.h"
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#include "LittleEndian.h"
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#include "alk.h"
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alk_t *alk_new(const char *path) {
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alk_t *alk;
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int i;
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mmap_t *m = map_file(path);
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if (0 != strncmp(m->addr, "ALK0", 4)) {
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WARNING("%s: not an ALK file\n", path);
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unmap_file(m);
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return NULL;
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}
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alk = calloc(1, sizeof(alk_t));
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alk->mmap = m;
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alk->datanum = LittleEndian_getDW(m->addr, 4);
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alk->offset = malloc(sizeof(int) * alk->datanum);
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for (i = 0; i < alk->datanum; i++) {
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alk->offset[i] = LittleEndian_getDW(m->addr, 8 + i * 8);
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}
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return alk;
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}
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int alk_free(alk_t *alk) {
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if (alk == NULL) return OK;
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unmap_file(alk->mmap);
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free(alk->offset);
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free(alk);
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return OK;
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}
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char *alk_get(alk_t *alk, int no) {
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if (no >= alk->datanum) return NULL;
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return (char *)alk->mmap->addr + alk->offset[no];
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}
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