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|
/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* $URL$
* $Id$
*
*/
#include "common/archive.h"
#include "common/file.h"
#include "common/str.h"
#include "common/savefile.h"
#include "sci/sci.h"
#include "sci/engine/state.h"
#include "sci/engine/kernel.h"
#include "sci/engine/savegame.h"
namespace Sci {
enum {
MAX_SAVEGAME_NR = 20 /**< Maximum number of savegames */
};
struct SavegameDesc {
int id;
int date;
int time;
};
/*
* Note on how file I/O is implemented: In ScummVM, one can not create/write
* arbitrary data files, simply because many of our target platforms do not
* support this. The only files one can create are savestates. But SCI has an
* opcode to create and write to seemingly 'arbitrary' files. This is mainly
* used in LSL3 for LARRY3.DRV (which is a game data file, not a driver) and
* in LSL5 for MEMORY.DRV (which is again a game data file and contains the
* game's password).
* To implement that opcode, we combine the SaveFileManager with regular file
* code, similarly to how the SCUMM HE engine does it.
*
* To handle opening a file called "foobar", what we do is this: First, we
* create an 'augmented file name', by prepending the game target and a dash,
* so if we running game target sq1sci, the name becomes "sq1sci-foobar".
* Next, we check if such a file is known to the SaveFileManager. If so, we
* we use that for reading/writing, delete it, whatever.
*
* If no such file is present but we were only asked to *read* the file,
* we fallback to looking for a regular file called "foobar", and open that
* for reading only.
*/
FileHandle::FileHandle() : _in(0), _out(0) {
}
FileHandle::~FileHandle() {
close();
}
void FileHandle::close() {
delete _in;
delete _out;
_in = 0;
_out = 0;
_name.clear();
}
bool FileHandle::isOpen() const {
return _in || _out;
}
enum {
_K_FILE_MODE_OPEN_OR_CREATE = 0,
_K_FILE_MODE_OPEN_OR_FAIL = 1,
_K_FILE_MODE_CREATE = 2
};
void file_open(EngineState *s, const char *filename, int mode) {
// QfG3 character import prepends /\ to the filenames.
if (filename[0] == '/' && filename[1] == '\\')
filename += 2;
Common::String englishName = s->getLanguageString(filename, K_LANG_ENGLISH);
const Common::String wrappedName = ((Sci::SciEngine*)g_engine)->wrapFilename(englishName);
Common::SeekableReadStream *inFile = 0;
Common::WriteStream *outFile = 0;
Common::SaveFileManager *saveFileMan = g_engine->getSaveFileManager();
if (mode == _K_FILE_MODE_OPEN_OR_FAIL) {
// Try to open file, abort if not possible
inFile = saveFileMan->openForLoading(wrappedName);
// If no matching savestate exists: fall back to reading from a regular file
if (!inFile)
inFile = SearchMan.createReadStreamForMember(englishName);
// Special case for LSL3: It tries to create a new dummy file, LARRY3.DRV
// Apparently, if the file doesn't exist here, it should be created. The game
// scripts then go ahead and fill its contents with data. It seems to be a similar
// case as the dummy MEMORY.DRV file in LSL5, but LSL5 creates the file if it can't
// find it with a separate call to file_open()
if (!inFile && englishName == "LARRY3.DRV") {
outFile = saveFileMan->openForSaving(wrappedName);
outFile->finalize();
delete outFile;
outFile = 0;
inFile = SearchMan.createReadStreamForMember(wrappedName);
}
if (!inFile)
warning("file_open(_K_FILE_MODE_OPEN_OR_FAIL) failed to open file '%s'", englishName.c_str());
} else if (mode == _K_FILE_MODE_CREATE) {
// Create the file, destroying any content it might have had
outFile = saveFileMan->openForSaving(wrappedName);
if (!outFile)
warning("file_open(_K_FILE_MODE_CREATE) failed to create file '%s'", englishName.c_str());
} else if (mode == _K_FILE_MODE_OPEN_OR_CREATE) {
// Try to open file, create it if it doesn't exist
// This has been disabled, as it's not used anywhere. Furthermore, it's not
// quite clear what should happen if the given file already exists... open
// it for appending? Or (more likely), open it for reading *and* writing?
// We may have to clone the file for that, etc., see also the long comment
// at the start of this file.
error("file_open(_K_FILE_MODE_OPEN_OR_CREATE) File creation currently not supported (filename '%s')", englishName.c_str());
} else {
error("file_open: unsupported mode %d (filename '%s')", mode, englishName.c_str());
}
if (!inFile && !outFile) { // Failed
debug(3, "file_open() failed");
s->r_acc = SIGNAL_REG;
return;
}
// Find a free file handle
uint handle = 1; // Ignore _fileHandles[0]
while ((handle < s->_fileHandles.size()) && s->_fileHandles[handle].isOpen())
handle++;
if (handle == s->_fileHandles.size()) { // Hit size limit => Allocate more space
s->_fileHandles.resize(s->_fileHandles.size() + 1);
}
s->_fileHandles[handle]._in = inFile;
s->_fileHandles[handle]._out = outFile;
s->_fileHandles[handle]._name = englishName;
s->r_acc = make_reg(0, handle);
debug(3, " -> opened file '%s' with handle %d", englishName.c_str(), handle);
}
reg_t kFOpen(EngineState *s, int argc, reg_t *argv) {
Common::String name = s->_segMan->getString(argv[0]);
int mode = argv[1].toUint16();
debug(3, "kFOpen(%s,0x%x)", name.c_str(), mode);
file_open(s, name.c_str(), mode);
return s->r_acc;
}
static FileHandle *getFileFromHandle(EngineState *s, uint handle) {
if (handle == 0) {
error("Attempt to use file handle 0");
return 0;
}
if ((handle >= s->_fileHandles.size()) || !s->_fileHandles[handle].isOpen()) {
error("Attempt to use invalid/unused file handle %d", handle);
return 0;
}
return &s->_fileHandles[handle];
}
reg_t kFClose(EngineState *s, int argc, reg_t *argv) {
debug(3, "kFClose(%d)", argv[0].toUint16());
if (argv[0] != SIGNAL_REG) {
FileHandle *f = getFileFromHandle(s, argv[0].toUint16());
if (f)
f->close();
}
return s->r_acc;
}
reg_t kFPuts(EngineState *s, int argc, reg_t *argv) {
int handle = argv[0].toUint16();
Common::String data = s->_segMan->getString(argv[1]);
getFileFromHandle(s, handle)->_out->write(data.c_str(), data.size());
return s->r_acc;
}
static void fgets_wrapper(EngineState *s, char *dest, int maxsize, int handle) {
debugC(2, kDebugLevelFile, "FGets'ing %d bytes from handle %d\n", maxsize, handle);
FileHandle *f = getFileFromHandle(s, handle);
if (!f)
return;
if (!f->_in) {
error("fgets_wrapper: Trying to read from file '%s' opened for writing", f->_name.c_str());
return;
}
f->_in->readLine(dest, maxsize);
// The returned string must not have an ending LF
int strSize = strlen(dest);
if (strSize > 0) {
if (dest[strSize - 1] == 0x0A)
dest[strSize - 1] = 0;
}
debugC(2, kDebugLevelFile, "FGets'ed \"%s\"\n", dest);
}
static int _savegame_index_struct_compare(const void *a, const void *b) {
const SavegameDesc *A = (const SavegameDesc *)a;
const SavegameDesc *B = (const SavegameDesc *)b;
if (B->date != A->date)
return B->date - A->date;
return B->time - A->time;
}
void listSavegames(Common::Array<SavegameDesc> &saves) {
Common::SaveFileManager *saveFileMan = g_engine->getSaveFileManager();
// Load all saves
Common::StringList saveNames = saveFileMan->listSavefiles(((SciEngine *)g_engine)->getSavegamePattern());
for (Common::StringList::const_iterator iter = saveNames.begin(); iter != saveNames.end(); ++iter) {
Common::String filename = *iter;
Common::SeekableReadStream *in;
if ((in = saveFileMan->openForLoading(filename))) {
SavegameMetadata meta;
if (!get_savegame_metadata(in, &meta)) {
// invalid
delete in;
continue;
}
delete in;
SavegameDesc desc;
desc.id = strtol(filename.end() - 3, NULL, 10);
desc.date = meta.savegame_date;
desc.time = meta.savegame_time;
debug(3, "Savegame in file %s ok, id %d", filename.c_str(), desc.id);
saves.push_back(desc);
}
}
// Sort the list by creation date of the saves
qsort(saves.begin(), saves.size(), sizeof(SavegameDesc), _savegame_index_struct_compare);
}
reg_t kFGets(EngineState *s, int argc, reg_t *argv) {
int maxsize = argv[1].toUint16();
char *buf = new char[maxsize];
int handle = argv[2].toUint16();
debug(3, "kFGets(%d,%d)", handle, maxsize);
fgets_wrapper(s, buf, maxsize, handle);
s->_segMan->memcpy(argv[0], (const byte*)buf, maxsize);
return argv[0];
}
/**
* Writes the cwd to the supplied address and returns the address in acc.
*/
reg_t kGetCWD(EngineState *s, int argc, reg_t *argv) {
// We do not let the scripts see the file system, instead pretending
// we are always in the same directory.
// TODO/FIXME: Is "/" a good value? Maybe "" or "." or "C:\" are better?
s->_segMan->strcpy(argv[0], "/");
debug(3, "kGetCWD() -> %s", "/");
return argv[0];
}
enum {
K_DEVICE_INFO_GET_DEVICE = 0,
K_DEVICE_INFO_GET_CURRENT_DEVICE = 1,
K_DEVICE_INFO_PATHS_EQUAL = 2,
K_DEVICE_INFO_IS_FLOPPY = 3,
K_DEVICE_INFO_GET_SAVECAT_NAME = 7,
K_DEVICE_INFO_GET_SAVEFILE_NAME = 8
};
reg_t kDeviceInfo(EngineState *s, int argc, reg_t *argv) {
int mode = argv[0].toUint16();
switch (mode) {
case K_DEVICE_INFO_GET_DEVICE: {
Common::String input_str = s->_segMan->getString(argv[1]);
s->_segMan->strcpy(argv[2], "/");
debug(3, "K_DEVICE_INFO_GET_DEVICE(%s) -> %s", input_str.c_str(), "/");
break;
}
case K_DEVICE_INFO_GET_CURRENT_DEVICE:
s->_segMan->strcpy(argv[1], "/");
debug(3, "K_DEVICE_INFO_GET_CURRENT_DEVICE() -> %s", "/");
break;
case K_DEVICE_INFO_PATHS_EQUAL: {
Common::String path1_s = s->_segMan->getString(argv[1]);
Common::String path2_s = s->_segMan->getString(argv[2]);
debug(3, "K_DEVICE_INFO_PATHS_EQUAL(%s,%s)", path1_s.c_str(), path2_s.c_str());
return make_reg(0, Common::matchString(path2_s.c_str(), path1_s.c_str(), false, true));
}
break;
case K_DEVICE_INFO_IS_FLOPPY: {
Common::String input_str = s->_segMan->getString(argv[1]);
debug(3, "K_DEVICE_INFO_IS_FLOPPY(%s)", input_str.c_str());
return NULL_REG; /* Never */
}
/* SCI uses these in a less-than-portable way to delete savegames.
** Read http://www-plan.cs.colorado.edu/creichen/freesci-logs/2005.10/log20051019.html
** for more information on our workaround for this.
*/
case K_DEVICE_INFO_GET_SAVECAT_NAME: {
Common::String game_prefix = s->_segMan->getString(argv[2]);
s->_segMan->strcpy(argv[1], "__throwaway");
debug(3, "K_DEVICE_INFO_GET_SAVECAT_NAME(%s) -> %s", game_prefix.c_str(), "__throwaway");
}
break;
case K_DEVICE_INFO_GET_SAVEFILE_NAME: {
Common::String game_prefix = s->_segMan->getString(argv[2]);
int savegame_id = argv[3].toUint16();
s->_segMan->strcpy(argv[1], "__throwaway");
debug(3, "K_DEVICE_INFO_GET_SAVEFILE_NAME(%s,%d) -> %s", game_prefix.c_str(), savegame_id, "__throwaway");
Common::Array<SavegameDesc> saves;
listSavegames(saves);
int savedir_nr = saves[savegame_id].id;
Common::String filename = ((Sci::SciEngine*)g_engine)->getSavegameName(savedir_nr);
Common::SaveFileManager *saveFileMan = g_engine->getSaveFileManager();
saveFileMan->removeSavefile(filename);
}
break;
default:
// TODO: Not all sub-commands are handled. E.g. KQ5CD calls sub-command 5
warning("Unknown DeviceInfo() sub-command: %d", mode);
break;
}
return s->r_acc;
}
reg_t kGetSaveDir(EngineState *s, int argc, reg_t *argv) {
#ifdef ENABLE_SCI32
// TODO: SCI32 uses a parameter here.
if (argc > 0)
warning("kGetSaveDir called with %d parameter(s): %04x:%04x", argc, PRINT_REG(argv[0]));
#endif
return make_reg(s->sys_strings_segment, SYS_STRING_SAVEDIR);
}
reg_t kCheckFreeSpace(EngineState *s, int argc, reg_t *argv) {
Common::String path = s->_segMan->getString(argv[0]);
debug(3, "kCheckFreeSpace(%s)", path.c_str());
// We simply always pretend that there is enough space.
// The alternative would be to write a big test file, which is not nice
// on systems where doing so is very slow.
return make_reg(0, 1);
}
reg_t kCheckSaveGame(EngineState *s, int argc, reg_t *argv) {
Common::String game_id = s->_segMan->getString(argv[0]);
int savedir_nr = argv[1].toUint16();
debug(3, "kCheckSaveGame(%s, %d)", game_id.c_str(), savedir_nr);
Common::Array<SavegameDesc> saves;
listSavegames(saves);
savedir_nr = saves[savedir_nr].id;
if (savedir_nr > MAX_SAVEGAME_NR - 1) {
return NULL_REG;
}
Common::SaveFileManager *saveFileMan = g_engine->getSaveFileManager();
Common::String filename = ((Sci::SciEngine*)g_engine)->getSavegameName(savedir_nr);
Common::SeekableReadStream *in;
if ((in = saveFileMan->openForLoading(filename))) {
// found a savegame file
SavegameMetadata meta;
if (!get_savegame_metadata(in, &meta)) {
// invalid
s->r_acc = make_reg(0, 0);
} else {
s->r_acc = make_reg(0, 1);
}
delete in;
} else {
s->r_acc = make_reg(0, 1);
}
return s->r_acc;
}
reg_t kGetSaveFiles(EngineState *s, int argc, reg_t *argv) {
Common::String game_id = s->_segMan->getString(argv[0]);
reg_t nametarget = argv[1];
reg_t *nameoffsets = s->_segMan->derefRegPtr(argv[2], 0);
debug(3, "kGetSaveFiles(%s)", game_id.c_str());
Common::Array<SavegameDesc> saves;
listSavegames(saves);
s->r_acc = NULL_REG;
Common::SaveFileManager *saveFileMan = g_engine->getSaveFileManager();
for (uint i = 0; i < saves.size(); i++) {
Common::String filename = ((Sci::SciEngine*)g_engine)->getSavegameName(saves[i].id);
Common::SeekableReadStream *in;
if ((in = saveFileMan->openForLoading(filename))) {
// found a savegame file
SavegameMetadata meta;
if (!get_savegame_metadata(in, &meta)) {
// invalid
delete in;
continue;
}
if (!meta.savegame_name.empty()) {
if (meta.savegame_name.lastChar() == '\n')
meta.savegame_name.deleteLastChar();
*nameoffsets = s->r_acc; // Store savegame ID
++s->r_acc.offset; // Increase number of files found
nameoffsets++; // Make sure the next ID string address is written to the next pointer
Common::String name = meta.savegame_name;
if (name.size() > SCI_MAX_SAVENAME_LENGTH-1)
name = Common::String(meta.savegame_name.c_str(), SCI_MAX_SAVENAME_LENGTH-1);
s->_segMan->strcpy(nametarget, name.c_str());
// Increase name offset pointer accordingly
nametarget.offset += SCI_MAX_SAVENAME_LENGTH;
}
delete in;
}
}
//free(gfname);
s->_segMan->strcpy(nametarget, ""); // Terminate list
return s->r_acc;
}
reg_t kSaveGame(EngineState *s, int argc, reg_t *argv) {
Common::String game_id = s->_segMan->getString(argv[0]);
int savedir_nr = argv[1].toUint16();
int savedir_id; // Savegame ID, derived from savedir_nr and the savegame ID list
Common::String game_description = s->_segMan->getString(argv[2]);
Common::String version;
if (argc > 3)
version = s->_segMan->getString(argv[3]);
debug(3, "kSaveGame(%s,%d,%s,%s)", game_id.c_str(), savedir_nr, game_description.c_str(), version.c_str());
Common::Array<SavegameDesc> saves;
listSavegames(saves);
if (savedir_nr >= 0 && (uint)savedir_nr < saves.size()) {
// Overwrite
savedir_id = saves[savedir_nr].id;
} else if (savedir_nr >= 0 && savedir_nr < MAX_SAVEGAME_NR) {
uint i = 0;
savedir_id = 0;
// First, look for holes
while (i < saves.size()) {
if (saves[i].id == savedir_id) {
++savedir_id;
i = 0;
} else
++i;
}
if (savedir_id >= MAX_SAVEGAME_NR) {
warning("Internal error: Free savegame ID is %d, shouldn't happen", savedir_id);
return NULL_REG;
}
// This loop terminates when savedir_id is not in [x | ex. n. saves [n].id = x]
} else {
warning("Savegame ID %d is not allowed", savedir_nr);
return NULL_REG;
}
Common::String filename = ((Sci::SciEngine*)g_engine)->getSavegameName(savedir_id);
Common::SaveFileManager *saveFileMan = g_engine->getSaveFileManager();
Common::OutSaveFile *out;
if (!(out = saveFileMan->openForSaving(filename))) {
warning("Error opening savegame \"%s\" for writing", filename.c_str());
s->r_acc = NULL_REG;
return NULL_REG;
}
if (gamestate_save(s, out, game_description.c_str(), version.c_str())) {
warning("Saving the game failed.");
s->r_acc = NULL_REG;
} else {
out->finalize();
if (out->err()) {
delete out;
warning("Writing the savegame failed.");
s->r_acc = NULL_REG;
} else {
delete out;
s->r_acc = make_reg(0, 1);
}
}
return s->r_acc;
}
reg_t kRestoreGame(EngineState *s, int argc, reg_t *argv) {
Common::String game_id = s->_segMan->getString(argv[0]);
int savedir_nr = argv[1].toUint16();
debug(3, "kRestoreGame(%s,%d)", game_id.c_str(), savedir_nr);
Common::Array<SavegameDesc> saves;
listSavegames(saves);
savedir_nr = saves[savedir_nr].id;
if (savedir_nr > -1) {
Common::SaveFileManager *saveFileMan = g_engine->getSaveFileManager();
Common::String filename = ((Sci::SciEngine*)g_engine)->getSavegameName(savedir_nr);
Common::SeekableReadStream *in;
if ((in = saveFileMan->openForLoading(filename))) {
// found a savegame file
EngineState *newstate = gamestate_restore(s, in);
delete in;
if (newstate) {
s->successor = newstate;
script_abort_flag = 2; // Abort current game with replay
shrink_execution_stack(s, s->execution_stack_base + 1);
} else {
s->r_acc = make_reg(0, 1);
warning("Restoring failed (game_id = '%s')", game_id.c_str());
}
return s->r_acc;
}
}
s->r_acc = make_reg(0, 1);
warning("Savegame #%d not found", savedir_nr);
return s->r_acc;
}
reg_t kValidPath(EngineState *s, int argc, reg_t *argv) {
Common::String path = s->_segMan->getString(argv[0]);
// FIXME: For now, we only accept the (fake) dir "" as a valid path.
s->r_acc = make_reg(0, path == "");
debug(3, "kValidPath(%s) -> %d", path.c_str(), s->r_acc.offset);
return s->r_acc;
}
enum {
K_FILEIO_OPEN = 0,
K_FILEIO_CLOSE = 1,
K_FILEIO_READ_RAW = 2,
K_FILEIO_WRITE_RAW = 3,
K_FILEIO_UNLINK = 4,
K_FILEIO_READ_STRING = 5,
K_FILEIO_WRITE_STRING = 6,
K_FILEIO_SEEK = 7,
K_FILEIO_FIND_FIRST = 8,
K_FILEIO_FIND_NEXT = 9,
K_FILEIO_FILE_EXISTS = 10,
// SCI1.1
K_FILEIO_RENAME = 11,
// SCI32
// 12?
K_FILEIO_READ_BYTE = 13,
K_FILEIO_WRITE_BYTE = 14,
K_FILEIO_READ_WORD = 15,
K_FILEIO_WRITE_WORD = 16
};
reg_t DirSeeker::firstFile(const Common::String &mask, reg_t buffer) {
// Verify that we are given a valid buffer
if (!buffer.segment) {
error("DirSeeker::firstFile('%s') invoked with invalid buffer", mask.c_str());
return NULL_REG;
}
_outbuffer = buffer;
// Obtain a list of all savefiles matching the given mask
// TODO: Modify the mask, e.g. by prefixing "TARGET-".
Common::SaveFileManager *saveFileMan = g_engine->getSaveFileManager();
_savefiles = saveFileMan->listSavefiles(mask);
// Reset the list iterator and write the first match to the output buffer, if any.
_iter = _savefiles.begin();
return nextFile();
}
reg_t DirSeeker::nextFile() {
if (_iter == _savefiles.end()) {
return NULL_REG;
}
// TODO: Transform the string back into a format usable by the SCI scripts.
// I.e., strip any TARGET- prefix.
Common::String string = *_iter;
if (string.size() > 12)
string = Common::String(string.c_str(), 12);
_state->_segMan->strcpy(_outbuffer, string.c_str());
// Return the result and advance the list iterator :)
++_iter;
return _outbuffer;
}
reg_t kFileIO(EngineState *s, int argc, reg_t *argv) {
int func_nr = argv[0].toUint16();
switch (func_nr) {
case K_FILEIO_OPEN : {
Common::String name = s->_segMan->getString(argv[1]);
int mode = argv[2].toUint16();
// SQ4 floppy prepends /\ to the filenames
if (name.hasPrefix("/\\")) {
name.deleteChar(0);
name.deleteChar(0);
}
// SQ4 floppy attempts to update the savegame index file sq4sg.dir
// when deleting saved games. We don't use an index file for saving
// or loading, so just stop the game from modifying the file here
// in order to avoid having it saved in the ScummVM save directory
if (name == "sq4sg.dir") {
debugC(2, kDebugLevelFile, "Not opening unused file sq4sg.dir");
return SIGNAL_REG;
}
if (name.empty()) {
warning("Attempted to open a file with an empty filename");
return SIGNAL_REG;
}
file_open(s, name.c_str(), mode);
debug(3, "K_FILEIO_OPEN(%s,0x%x)", name.c_str(), mode);
break;
}
case K_FILEIO_CLOSE : {
debug(3, "K_FILEIO_CLOSE(%d)", argv[1].toUint16());
FileHandle *f = getFileFromHandle(s, argv[1].toUint16());
if (f)
f->close();
break;
}
case K_FILEIO_READ_RAW : {
int handle = argv[1].toUint16();
int size = argv[3].toUint16();
char *buf = new char[size];
debug(3, "K_FILEIO_READ_RAW(%d,%d)", handle, size);
s->r_acc = make_reg(0, getFileFromHandle(s, handle)->_in->read(buf, size));
s->_segMan->memcpy(argv[2], (const byte*)buf, size);
delete[] buf;
break;
}
case K_FILEIO_WRITE_RAW : {
int handle = argv[1].toUint16();
int size = argv[3].toUint16();
char *buf = new char[size];
s->_segMan->memcpy((byte*)buf, argv[2], size);
debug(3, "K_FILEIO_WRITE_RAW(%d,%d)", handle, size);
getFileFromHandle(s, handle)->_out->write(buf, size);
delete[] buf;
break;
}
case K_FILEIO_UNLINK : {
Common::String name = s->_segMan->getString(argv[1]);
Common::SaveFileManager *saveFileMan = g_engine->getSaveFileManager();
// SQ4 floppy prepends /\ to the filenames
if (name.hasPrefix("/\\")) {
name.deleteChar(0);
name.deleteChar(0);
}
// Special case for SQ4 floppy: This game has hardcoded names for all of its
// savegames, and they are all named "sq4sg.xxx", where xxx is the slot. We just
// take the slot number here, and delete the appropriate save game
if (name.hasPrefix("sq4sg.")) {
// Special handling for SQ4... get the slot number and construct the save game name
int slotNum = atoi(name.c_str() + name.size() - 3);
Common::Array<SavegameDesc> saves;
listSavegames(saves);
int savedir_nr = saves[slotNum].id;
name = ((Sci::SciEngine*)g_engine)->getSavegameName(savedir_nr);
saveFileMan->removeSavefile(name);
} else {
const Common::String wrappedName = ((Sci::SciEngine*)g_engine)->wrapFilename(name);
saveFileMan->removeSavefile(wrappedName);
}
debug(3, "K_FILEIO_UNLINK(%s)", name.c_str());
// TODO/FIXME: Should we return something (like, a bool indicating
// whether deleting the save succeeded or failed)?
break;
}
case K_FILEIO_READ_STRING : {
int size = argv[2].toUint16();
char *buf = new char[size];
int handle = argv[3].toUint16();
debug(3, "K_FILEIO_READ_STRING(%d,%d)", handle, size);
fgets_wrapper(s, buf, size, handle);
s->_segMan->memcpy(argv[1], (const byte*)buf, size);
delete[] buf;
return argv[1];
}
case K_FILEIO_WRITE_STRING : {
int handle = argv[1].toUint16();
int size = argv[3].toUint16();
Common::String str = s->_segMan->getString(argv[2]);
debug(3, "K_FILEIO_WRITE_STRING(%d,%d)", handle, size);
// CHECKME: Is the size parameter used at all?
// In the LSL5 password protection it is zero, and we should
// then write a full string. (Not sure if it should write the
// terminating zero.)
getFileFromHandle(s, handle)->_out->write(str.c_str(), str.size());
break;
}
case K_FILEIO_SEEK : {
int handle = argv[1].toUint16();
int offset = argv[2].toUint16();
int whence = argv[3].toUint16();
debug(3, "K_FILEIO_SEEK(%d,%d,%d)", handle, offset, whence);
s->r_acc = make_reg(0, getFileFromHandle(s, handle)->_in->seek(offset, whence));
break;
}
case K_FILEIO_FIND_FIRST : {
Common::String mask = s->_segMan->getString(argv[1]);
reg_t buf = argv[2];
int attr = argv[3].toUint16(); // We won't use this, Win32 might, though...
debug(3, "K_FILEIO_FIND_FIRST(%s,0x%x)", mask.c_str(), attr);
// QfG3 uses this mask for the character import
if (mask == "/\\*.*")
mask = "*.*";
#ifndef WIN32
if (mask == "*.*")
mask = "*"; // For UNIX
#endif
s->r_acc = s->_dirseeker.firstFile(mask, buf);
break;
}
case K_FILEIO_FIND_NEXT : {
debug(3, "K_FILEIO_FIND_NEXT()");
s->r_acc = s->_dirseeker.nextFile();
break;
}
case K_FILEIO_FILE_EXISTS : {
Common::String name = s->_segMan->getString(argv[1]);
// Check for regular file
bool exists = Common::File::exists(name);
Common::SaveFileManager *saveFileMan = g_engine->getSaveFileManager();
const Common::String wrappedName = ((Sci::SciEngine*)g_engine)->wrapFilename(name);
if (!exists)
exists = !saveFileMan->listSavefiles(name).empty();
if (!exists) {
// Try searching for the file prepending target-
Common::SeekableReadStream *inFile = saveFileMan->openForLoading(wrappedName);
exists = (inFile != 0);
delete inFile;
}
// Special case for non-English versions of LSL5: The English version of LSL5 calls
// kFileIO(), case K_FILEIO_OPEN for reading to check if memory.drv exists (which is
// where the game's password is stored). If it's not found, it calls kFileIO() again,
// case K_FILEIO_OPEN for writing and creates a new file. Non-English versions call
// kFileIO(), case K_FILEIO_FILE_EXISTS instead, and fail if memory.drv can't be found.
// We create a default memory.drv file with no password, so that the game can continue
if (!exists && name == "memory.drv") {
// Create a new file, and write the bytes for the empty password string inside
byte defaultContent[] = { 0xE9, 0xE9, 0xEB, 0xE1, 0x0D, 0x0A, 0x31, 0x30, 0x30, 0x30 };
Common::WriteStream *outFile = saveFileMan->openForSaving(wrappedName);
for (int i = 0; i < 10; i++)
outFile->writeByte(defaultContent[i]);
outFile->finalize();
delete outFile;
exists = true;
}
debug(3, "K_FILEIO_FILE_EXISTS(%s) -> %d", name.c_str(), exists);
return make_reg(0, exists);
}
case K_FILEIO_RENAME: {
Common::String oldName = s->_segMan->getString(argv[1]);
Common::String newName = s->_segMan->getString(argv[2]);
// SCI1.1 returns 0 on success and a DOS error code on fail. SCI32 returns -1 on fail.
// We just return -1 for all versions.
if (g_engine->getSaveFileManager()->renameSavefile(oldName, newName))
return NULL_REG;
else
return SIGNAL_REG;
}
#ifdef ENABLE_SCI32
case K_FILEIO_READ_BYTE:
// Read the byte into the low byte of the accumulator
return make_reg(0, (s->r_acc.toUint16() & 0xff00) | getFileFromHandle(s, argv[1].toUint16())->_in->readByte());
case K_FILEIO_WRITE_BYTE:
getFileFromHandle(s, argv[1].toUint16())->_out->writeByte(argv[2].toUint16() & 0xff);
break;
case K_FILEIO_READ_WORD:
return make_reg(0, getFileFromHandle(s, argv[1].toUint16())->_in->readUint16LE());
case K_FILEIO_WRITE_WORD:
getFileFromHandle(s, argv[1].toUint16())->_out->writeUint16LE(argv[2].toUint16());
break;
#endif
default:
error("Unknown FileIO() sub-command: %d", func_nr);
}
return s->r_acc;
}
} // End of namespace Sci
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