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ratel api,used for developer on ratel system,an extension for xposed framewrok,ratel api compatable with original xposed framework
package de.robv.android.xposed.services;
import java.io.IOException;
import java.util.Arrays;
/** @hide */
@SuppressWarnings("JniMissingFunction")
public final class ZygoteService extends BaseService {
@Override
public native boolean checkFileAccess(String filename, int mode);
@Override
public native FileResult statFile(String filename) throws IOException;
@Override
public native byte[] readFile(String filename) throws IOException;
@Override
// Just for completeness, we don't expect this to be called often in Zygote.
public FileResult readFile(String filename, long previousSize, long previousTime) throws IOException {
FileResult stat = statFile(filename);
if (previousSize == stat.size && previousTime == stat.mtime)
return stat;
return new FileResult(readFile(filename), stat.size, stat.mtime);
}
@Override
// Just for completeness, we don't expect this to be called often in Zygote.
public FileResult readFile(String filename, int offset, int length, long previousSize, long previousTime) throws IOException {
FileResult stat = statFile(filename);
if (previousSize == stat.size && previousTime == stat.mtime)
return stat;
// Shortcut for the simple case
if (offset <= 0 && length <= 0)
return new FileResult(readFile(filename), stat.size, stat.mtime);
// Check range
if (offset > 0 && offset >= stat.size) {
throw new IllegalArgumentException("offset " + offset + " >= size " + stat.size + " for " + filename);
} else if (offset < 0) {
offset = 0;
}
if (length > 0 && (offset + length) > stat.size) {
throw new IllegalArgumentException("offset " + offset + " + length " + length + " > size " + stat.size + " for " + filename);
} else if (length <= 0) {
length = (int) (stat.size - offset);
}
byte[] content = readFile(filename);
return new FileResult(Arrays.copyOfRange(content, offset, offset + length), stat.size, stat.mtime);
}
}