mirror of
https://github.com/libretro/scummvm.git
synced 2024-12-30 22:23:54 +00:00
370 lines
8.5 KiB
C++
370 lines
8.5 KiB
C++
/* ScummVM - Scumm Interpreter
|
|
* Copyright (C) 2004 Ivan Dubrov
|
|
* Copyright (C) 2004-2005 The ScummVM project
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation; either version 2
|
|
* of the License, or (at your option) any later version.
|
|
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
*
|
|
* $Header$
|
|
*
|
|
*/
|
|
#include "gob/gob.h"
|
|
#include "gob/global.h"
|
|
#include "gob/dataio.h"
|
|
#include "gob/pack.h"
|
|
|
|
namespace Gob {
|
|
|
|
int16 file_write(int16 handle, char *buf, int16 size) {
|
|
return filesHandles[handle].write(buf, size);
|
|
}
|
|
|
|
int16 file_open(const char *path, File::AccessMode mode) {
|
|
int16 i;
|
|
|
|
for (i = 0; i < MAX_FILES; i++) {
|
|
if (!filesHandles[i].isOpen())
|
|
break;
|
|
}
|
|
if (i == MAX_FILES)
|
|
return -1;
|
|
|
|
filesHandles[i].open(path, mode);
|
|
|
|
if (filesHandles[i].isOpen())
|
|
return i;
|
|
|
|
return -1;
|
|
}
|
|
|
|
File *file_getHandle(int16 handle) {
|
|
return &filesHandles[handle];
|
|
}
|
|
|
|
int16 data_getChunk(const char *chunkName) {
|
|
int16 file;
|
|
int16 slot;
|
|
int16 chunk;
|
|
struct ChunkDesc *dataDesc;
|
|
|
|
for (file = 0; file < MAX_DATA_FILES; file++) {
|
|
if (dataFiles[file] == 0)
|
|
return -1;
|
|
|
|
for (slot = 0; slot < MAX_SLOT_COUNT; slot++)
|
|
if (chunkPos[file * MAX_SLOT_COUNT + slot] == -1)
|
|
break;
|
|
|
|
if (slot == MAX_SLOT_COUNT)
|
|
return -1;
|
|
|
|
dataDesc = dataFiles[file];
|
|
for (chunk = 0; chunk < numDataChunks[file];
|
|
chunk++, dataDesc++) {
|
|
if (scumm_stricmp(chunkName, dataDesc->chunkName) != 0)
|
|
continue;
|
|
|
|
isCurrentSlot[file * MAX_SLOT_COUNT + slot] = 0;
|
|
chunkSize[file * MAX_SLOT_COUNT + slot] =
|
|
dataDesc->size;
|
|
chunkOffset[file * MAX_SLOT_COUNT + slot] =
|
|
dataDesc->offset;
|
|
chunkPos[file * MAX_SLOT_COUNT + slot] = 0;
|
|
return file * 10 + slot + 50;
|
|
}
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
char data_freeChunk(int16 handle) {
|
|
if (handle >= 50 && handle < 100) {
|
|
handle -= 50;
|
|
chunkPos[(handle / 10) * MAX_SLOT_COUNT + (handle % 10)] = -1;
|
|
return 0;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
int32 data_readChunk(int16 handle, char *buf, int16 size) {
|
|
int16 file;
|
|
int16 slot;
|
|
int16 i;
|
|
int32 offset;
|
|
|
|
if (handle < 50 || handle >= 100)
|
|
return -2;
|
|
|
|
file = (handle - 50) / 10;
|
|
slot = (handle - 50) % 10;
|
|
if (isCurrentSlot[file * MAX_SLOT_COUNT + slot] == 0) {
|
|
for (i = 0; i < MAX_SLOT_COUNT; i++)
|
|
isCurrentSlot[file * MAX_SLOT_COUNT + i] = 0;
|
|
|
|
offset =
|
|
chunkOffset[file * MAX_SLOT_COUNT + slot] +
|
|
chunkPos[file * MAX_SLOT_COUNT + slot];
|
|
debug(7, "seek: %ld, %ld", chunkOffset[file * MAX_SLOT_COUNT + slot], chunkPos[file * MAX_SLOT_COUNT + slot]);
|
|
file_getHandle(dataFileHandles[file])->seek(offset, SEEK_SET);
|
|
}
|
|
|
|
isCurrentSlot[file * MAX_SLOT_COUNT + slot] = 1;
|
|
if (chunkPos[file * MAX_SLOT_COUNT + slot] + size >
|
|
chunkSize[file * MAX_SLOT_COUNT + slot])
|
|
size =
|
|
chunkSize[file * MAX_SLOT_COUNT + slot] -
|
|
chunkPos[file * MAX_SLOT_COUNT + slot];
|
|
|
|
file_getHandle(dataFileHandles[file])->read(buf, size);
|
|
chunkPos[file * MAX_SLOT_COUNT + slot] += size;
|
|
return size;
|
|
}
|
|
|
|
int16 data_seekChunk(int16 handle, int32 pos, int16 from) {
|
|
int16 file;
|
|
int16 slot;
|
|
|
|
if (handle < 50 || handle >= 100)
|
|
return -1;
|
|
|
|
file = (handle - 50) / 10;
|
|
slot = (handle - 50) % 10;
|
|
isCurrentSlot[file * MAX_SLOT_COUNT + slot] = 0;
|
|
if (from == SEEK_SET)
|
|
chunkPos[file * MAX_SLOT_COUNT + slot] = pos;
|
|
else
|
|
chunkPos[file * MAX_SLOT_COUNT + slot] += pos;
|
|
|
|
return chunkPos[file * MAX_SLOT_COUNT + slot];
|
|
}
|
|
|
|
int32 data_getChunkSize(const char *chunkName) {
|
|
int16 file;
|
|
int16 chunk;
|
|
struct ChunkDesc *dataDesc;
|
|
int16 slot;
|
|
int32 realSize;
|
|
|
|
for (file = 0; file < MAX_DATA_FILES; file++) {
|
|
if (dataFiles[file] == 0)
|
|
return -1;
|
|
|
|
dataDesc = dataFiles[file];
|
|
for (chunk = 0; chunk < numDataChunks[file];
|
|
chunk++, dataDesc++) {
|
|
if (scumm_stricmp(chunkName, dataDesc->chunkName) != 0)
|
|
continue;
|
|
|
|
if (dataDesc->packed == 0) {
|
|
packedSize = -1;
|
|
return dataDesc->size;
|
|
}
|
|
|
|
for (slot = 0; slot < MAX_SLOT_COUNT; slot++)
|
|
isCurrentSlot[slot] = 0;
|
|
|
|
file_getHandle(dataFileHandles[file])->seek(dataDesc->offset, SEEK_SET);
|
|
realSize = file_getHandle(dataFileHandles[file])->readUint32LE();
|
|
packedSize = dataDesc->size;
|
|
return realSize;
|
|
}
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
void data_openDataFile(const char *src) {
|
|
char path[128];
|
|
int16 i;
|
|
int16 file;
|
|
struct ChunkDesc *dataDesc;
|
|
|
|
strcpy(path, src);
|
|
for (i = 0; path[i] != '.' && path[i] != 0; i++);
|
|
if (path[i] == 0)
|
|
strcat(path, ".stk");
|
|
|
|
for (file = 0; file < MAX_DATA_FILES; file++)
|
|
if (dataFiles[file] == 0)
|
|
break;
|
|
|
|
if (file == MAX_DATA_FILES)
|
|
error("data_dataFileOpen: Data file slots are full\n");
|
|
dataFileHandles[file] = file_open(path);
|
|
|
|
if (dataFileHandles[file] == -1)
|
|
error("data_dataFileOpen: Can't open %s data file\n", path);
|
|
|
|
numDataChunks[file] = file_getHandle(dataFileHandles[file])->readUint16LE();
|
|
|
|
debug(7, "DataChunks: %d [for %s]", numDataChunks[file], path);
|
|
|
|
dataFiles[file] = dataDesc =
|
|
(struct ChunkDesc *)malloc(sizeof(struct ChunkDesc) *
|
|
numDataChunks[file]);
|
|
|
|
for (i = 0; i < numDataChunks[file]; i++) {
|
|
file_getHandle(dataFileHandles[file])->read(dataDesc[i].chunkName, 13);
|
|
dataDesc[i].size = file_getHandle(dataFileHandles[file])->readUint32LE();
|
|
dataDesc[i].offset = file_getHandle(dataFileHandles[file])->readUint32LE();
|
|
dataDesc[i].packed = file_getHandle(dataFileHandles[file])->readByte();
|
|
}
|
|
|
|
for (i = 0; i < numDataChunks[file]; i++)
|
|
debug(7, "%d: %s %d", i, dataDesc[i].chunkName, dataDesc[i].size);
|
|
|
|
for (i = 0; i < MAX_SLOT_COUNT; i++)
|
|
chunkPos[file * MAX_SLOT_COUNT + i] = -1;
|
|
|
|
}
|
|
|
|
void data_closeDataFile() {
|
|
int16 file;
|
|
for (file = MAX_DATA_FILES - 1; file >= 0; file--) {
|
|
if (dataFiles[file] != 0) {
|
|
free(dataFiles[file]);
|
|
dataFiles[file] = 0;
|
|
file_getHandle(dataFileHandles[file])->close();
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
char *data_getUnpackedData(const char *name) {
|
|
int32 realSize;
|
|
int16 chunk;
|
|
char *unpackBuf;
|
|
char *packBuf;
|
|
char *ptr;
|
|
int32 sizeLeft;
|
|
|
|
realSize = data_getChunkSize(name);
|
|
if (packedSize == -1 || realSize == -1)
|
|
return 0;
|
|
|
|
chunk = data_getChunk(name);
|
|
if (chunk == -1)
|
|
return 0;
|
|
|
|
unpackBuf = (char *)malloc(realSize);
|
|
if (unpackBuf == 0)
|
|
return 0;
|
|
|
|
packBuf = (char *)malloc(packedSize);
|
|
if (packBuf == 0) {
|
|
free(unpackBuf);
|
|
return 0;
|
|
}
|
|
|
|
sizeLeft = packedSize;
|
|
ptr = packBuf;
|
|
while (sizeLeft > 0x4000) {
|
|
data_readChunk(chunk, ptr, 0x4000);
|
|
sizeLeft -= 0x4000;
|
|
ptr += 0x4000;
|
|
}
|
|
data_readChunk(chunk, ptr, sizeLeft);
|
|
data_freeChunk(chunk);
|
|
unpackData(packBuf, unpackBuf);
|
|
free(packBuf);
|
|
return unpackBuf;
|
|
}
|
|
|
|
void data_closeData(int16 handle) {
|
|
if (data_freeChunk(handle) != 0)
|
|
file_getHandle(handle)->close();
|
|
}
|
|
|
|
int16 data_openData(const char *path, File::AccessMode mode) {
|
|
int16 handle;
|
|
|
|
if (mode != File::kFileReadMode)
|
|
return file_open(path, mode);
|
|
|
|
handle = data_getChunk(path);
|
|
if (handle >= 0)
|
|
return handle;
|
|
|
|
return file_open(path, mode);
|
|
}
|
|
|
|
int32 data_readData(int16 handle, char *buf, int16 size) {
|
|
int32 res;
|
|
|
|
res = data_readChunk(handle, buf, size);
|
|
if (res >= 0)
|
|
return res;
|
|
|
|
return file_getHandle(handle)->read(buf, size);
|
|
}
|
|
|
|
void data_seekData(int16 handle, int32 pos, int16 from) {
|
|
int32 resPos;
|
|
|
|
resPos = data_seekChunk(handle, pos, from);
|
|
if (resPos != -1)
|
|
return;
|
|
|
|
file_getHandle(handle)->seek(pos, from);
|
|
}
|
|
|
|
int32 data_getDataSize(const char *name) {
|
|
char buf[128];
|
|
int32 chunkSz;
|
|
struct stat statBuf;
|
|
|
|
strcpy(buf, name);
|
|
chunkSz = data_getChunkSize(buf);
|
|
if (chunkSz >= 0)
|
|
return chunkSz;
|
|
|
|
if (stat(buf, &statBuf) == -1)
|
|
error("data_getDataSize: Can't find data (%s)", name);
|
|
|
|
return statBuf.st_size;
|
|
}
|
|
|
|
char *data_getData(const char *path) {
|
|
char *data;
|
|
char *ptr;
|
|
int32 size;
|
|
int16 handle;
|
|
|
|
data = data_getUnpackedData(path);
|
|
if (data != 0)
|
|
return data;
|
|
|
|
size = data_getDataSize(path);
|
|
data = (char *)malloc(size);
|
|
if (data == 0)
|
|
return 0;
|
|
|
|
handle = data_openData(path);
|
|
|
|
ptr = data;
|
|
while (size > 0x4000) {
|
|
data_readData(handle, ptr, 0x4000);
|
|
size -= 0x4000;
|
|
ptr += 0x4000;
|
|
}
|
|
data_readData(handle, ptr, size);
|
|
data_closeData(handle);
|
|
return data;
|
|
|
|
}
|
|
|
|
char *data_getSmallData(const char *path) {
|
|
return data_getData(path);
|
|
}
|
|
|
|
} // End of namespace Gob
|