/**
* 读取头文件
*
* @param dis
* @return
* @throws Exception
*/
public static LPKHeader readHeader(DataInputStream dis) throws Exception {
LPKHeader header = new LPKHeader();
header.setPAKIdentity(dis.readInt());
byte[] pass = readByteArray(dis, LPKHeader.LF_PASSWORD_LENGTH);
header.setPassword(pass);
header.setVersion(dis.readFloat());
header.setTables(dis.readLong());
return header;
}
/**
* 返回LPK文件信息
*
* @param pakFilePath
* @return
* @throws Exception
*/
public static List getLPKInfo(String resName) throws Exception {
InputStream in = Resources.getResourceAsStream(resName);
DataInputStream dis = new DataInputStream(in);
LPKHeader header = readHeader(dis);
LPKTable[] fileTable = readLPKTable(dis, (int) header.getTables());
List<Object> result = new ArrayList<Object>();
result.add(header);
result.add(fileTable);
return result;
}
/**
* 查找指定资源包中的指定资源文件并返回为Byte[]
*
* @param fileName
* @param resName
* @return
*/
public static byte[] openResource(String fileName, String resName) {
InputStream in = null;
DataInputStream dis = null;
try {
in = Resources.getResourceAsStream(fileName);
dis = new DataInputStream(in);
LPKHeader header = readHeader(dis);
LPKTable[] fileTable = readLPKTable(dis, (int) header.getTables());
boolean find = false;
int fileIndex = 0;
String innerName = null;
for (int i = 0; i < fileTable.length; i++) {
innerName = new String(fileTable[i].getFileName()).trim();
if (innerName.equals(resName)) {
find = true;
fileIndex = i;
break;
}
}
if (find == false) {
throw new RuntimeException("File not found. ( " + fileName + " )");
} else {
return readFileFromPak(dis, header, fileTable[fileIndex]);
}
} catch (Exception e) {
throw new RuntimeException("File not found. ( " + fileName + " )");
} finally {
if (dis != null) {
try {
dis.close();
dis = null;
} catch (IOException e) {
}
}
}
}
/**
* 获得指定头文件的偏移长度
*
* @param header
* @return
*/
public static long outputOffset(LPKHeader header) {
return LPKHeader.size() + header.getTables() * LPKTable.size();
}
