mirror of
https://github.com/libretro/scummvm.git
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181 lines
3.9 KiB
C++
181 lines
3.9 KiB
C++
/* ScummVM - Scumm Interpreter
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* Copyright (C) 2006 The ScummVM project
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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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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* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* $URL$
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* $Id$
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*
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*/
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#include "common/file.h"
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#include "parallaction/disk.h"
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namespace Parallaction {
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#define MAX_ARCHIVE_ENTRIES 384
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#define DIRECTORY_OFFSET_IN_FILE 0x4000
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static Common::File _archive;
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static char _archiveDir[MAX_ARCHIVE_ENTRIES][32];
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static uint32 _archiveLenghts[MAX_ARCHIVE_ENTRIES];
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static uint32 _archiveOffsets[MAX_ARCHIVE_ENTRIES];
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static uint32 _handle = MAX_ARCHIVE_ENTRIES;
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void openArchive(const char *file) {
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debugC(1, kDebugDisk, "open archive '%s'", file);
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if (_archive.isOpen())
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closeArchive();
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uint32 offset = DIRECTORY_OFFSET_IN_FILE;
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char path[PATH_LEN];
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strcpy(path, file);
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if (!_archive.open(path))
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errorFileNotFound(path);
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_archive.skip(22);
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_archive.read(_archiveDir, MAX_ARCHIVE_ENTRIES*32);
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uint16 i;
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for (i = 0; i < MAX_ARCHIVE_ENTRIES; i++) {
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_archiveOffsets[i] = offset;
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uint32 len = _archive.readUint32BE();
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// if (len>0) printf("%i) %s - [%i bytes]\n", i, _archiveDir[i], len);
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_archiveLenghts[i] = len;
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offset += len;
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}
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// printf("%i entries found\n", i);
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// printf("%i bytes of data\n", offset);
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return;
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}
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void closeArchive() {
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debugC(1, kDebugDisk, "close current archive");
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if (!_archive.isOpen()) return;
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_archive.close();
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}
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ArchivedFile *openArchivedFile(const char *name) {
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uint16 i = 0;
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for ( ; i < MAX_ARCHIVE_ENTRIES; i++) {
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if (!scumm_stricmp(_archiveDir[i], name)) break;
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}
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if (i == MAX_ARCHIVE_ENTRIES) return NULL;
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debugC(1, kDebugDisk, "file '%s' found in slot %i", name, i);
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ArchivedFile *file = (ArchivedFile*)memAlloc(sizeof(ArchivedFile));
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if (!file)
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error("openArchivedFile: can't allocate buffer for '%s'", name);
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file->_index = i;
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file->_offset = _archiveOffsets[i];
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file->_cursor = _archiveOffsets[i];
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file->_endOffset = _archiveOffsets[i] + _archiveLenghts[i];
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_handle = file->_index;
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_archive.seek(file->_offset);
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return file;
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}
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void closeArchivedFile(ArchivedFile *file) {
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if (file) memFree(file);
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_handle = MAX_ARCHIVE_ENTRIES;
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return;
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}
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uint16 getArchivedFileLength(const char *name) {
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// printf("getArchivedFileLength(%s)\n", name);
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for (uint16 i = 0; i < MAX_ARCHIVE_ENTRIES; i++) {
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if (!scumm_stricmp(_archiveDir[i], name))
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return _archiveLenghts[i];
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}
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return 0;
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}
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int16 readArchivedFile(ArchivedFile *file, void *buffer, uint16 size) {
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// printf("readArchivedFile(%i, %i)\n", file->_cursor, file->_endOffset);
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if (file->_cursor == file->_endOffset) return -1;
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if (file->_endOffset - file->_cursor < size)
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size = file->_endOffset - file->_cursor;
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_archive.seek(file->_cursor);
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int16 read = _archive.read(buffer, size);
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file->_cursor += read;
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return read;
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}
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#if 0
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int16 readArchivedFile(ArchivedFile *file, void *buffer, uint16 size) {
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printf("readArchivedFile(%i, %i)\n", file->_cursor, file->_endOffset);
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if (file->_cursor == file->_endOffset) return -1;
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_archive.seek(file->_cursor);
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int16 read = _archive.read(buffer, size);
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file->_cursor += read;
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return read;
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}
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#endif
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char *readArchivedFileText(char *buf, uint16 size, void*) {
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char *t = _archive.readLine(buf, size);
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if (_archive.eof() || t == NULL)
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return NULL;
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return t;
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}
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} // namespace Parallaction
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