int w_newFileData(lua_State *L)
{
// Single argument: treat as filepath or File.
if (lua_gettop(L) == 1)
{
// We don't use luax_getfiledata because we want to use an ioError.
if (lua_isstring(L, 1))
luax_convobj(L, 1, "filesystem", "newFile");
// Get FileData from the File.
if (luax_istype(L, 1, FILESYSTEM_FILE_ID))
{
File *file = luax_checkfile(L, 1);
FileData *data = 0;
try
{
data = file->read();
}
catch (love::Exception &e)
{
return luax_ioError(L, "%s", e.what());
}
luax_pushtype(L, FILESYSTEM_FILE_DATA_ID, data);
data->release();
return 1;
}
else
return luaL_argerror(L, 1, "filename or File expected");
}
size_t length = 0;
const char *str = luaL_checklstring(L, 1, &length);
const char *filename = luaL_checkstring(L, 2);
const char *decstr = lua_isstring(L, 3) ? lua_tostring(L, 3) : 0;
FileData::Decoder decoder = FileData::FILE;
if (decstr && !FileData::getConstant(decstr, decoder))
return luaL_error(L, "Invalid FileData decoder: %s", decstr);
FileData *t = 0;
switch (decoder)
{
case FileData::FILE:
t = instance()->newFileData((void *)str, (int)length, filename);
break;
case FileData::BASE64:
t = instance()->newFileData(str, filename);
break;
default:
return luaL_error(L, "Invalid FileData decoder: %s", decstr);
}
luax_pushtype(L, FILESYSTEM_FILE_DATA_ID, t);
t->release();
return 1;
}
FileData *File::read(int64 size)
{
bool isopen = isOpen();
if (!isopen && !open(MODE_READ))
throw love::Exception("Could not read file %s.", getFilename().c_str());
int64 max = getSize();
int64 cur = tell();
size = (size == ALL) ? max : size;
if (size < 0)
throw love::Exception("Invalid read size.");
// Clamping because the file offset may be in a weird position.
if (cur < 0)
cur = 0;
else if (cur > max)
cur = max;
if (cur + size > max)
size = max - cur;
FileData *fileData = new FileData(size, getFilename());
int64 bytesRead = read(fileData->getData(), size);
if (bytesRead < 0 || (bytesRead == 0 && bytesRead != size))
{
delete fileData;
throw love::Exception("Could not read from file.");
}
if (bytesRead < size)
{
FileData *tmpFileData = new FileData(bytesRead, getFilename());
memcpy(tmpFileData->getData(), fileData->getData(), (size_t) bytesRead);
fileData->release();
fileData = tmpFileData;
}
if (!isopen)
close();
return fileData;
}
