/*
* Class: edu_uw_apl_commons_tsk4j_filesys_File
* Method: read
* Signature: (JIIJ[BII)I
*/
JNIEXPORT jint JNICALL
Java_edu_uw_apl_commons_tsk4j_filesys_File_read__JIIJ_3BII
(JNIEnv * env, jobject thiz, jlong nativePtr,
jint type, jint id, jlong offset, jbyteArray buf, jint len, jint flags ) {
TSK_FS_FILE* info = (TSK_FS_FILE*)nativePtr;
char* bufC = (char*)malloc( len );
ssize_t read = tsk_fs_file_read_type( info, type, id,
offset, bufC, len, flags );
if( read != -1 )
(*env)->SetByteArrayRegion( env, buf, 0, read, (const jbyte*)bufC );
free( bufC );
return (jint)read;
}
int TskImageFileTsk::readFile(const int handle,
const uint64_t byte_offset,
const size_t byte_len,
char * buffer)
{
TskImageFileTsk::OPEN_FILE * openFile = m_openFiles[handle];
if (openFile == NULL || openFile->fsFile == NULL)
{
std::wstringstream errorMsg;
errorMsg << L"TskImageFileTsk::readFile - Either OPEN_FILE or TSK_FS_FILE is null." << std::endl;
LOGERROR(errorMsg.str());
return -1;
}
// fsAttr can be NULL if the file has no attributes.
if (openFile->fsAttr == NULL || byte_offset >= openFile->fsAttr->size)
{
// If the offset is larger than the attribute size then there is nothing left to read.
return 0;
}
int bytesRead = tsk_fs_file_read_type(openFile->fsFile,
static_cast<TSK_FS_ATTR_TYPE_ENUM>(openFile->fsAttr->type),
openFile->fsAttr->id,
byte_offset, buffer,
byte_len, TSK_FS_FILE_READ_FLAG_NONE);
if (bytesRead == -1)
{
std::wstringstream errorMsg;
errorMsg << L"TskImageFileTsk::readFile - Error reading file (FS_OFFSET: "
<< openFile->fsFile->fs_info->offset << " - ID: "
<< openFile->fsFile->meta->addr << " - "
<< ((openFile->fsFile->meta->flags & TSK_FS_META_FLAG_ALLOC) ? "Allocated" : "Deleted")
<< ") ("
<< tsk_error_get() << ")" << std::endl;
LOGERROR(errorMsg.str());
}
return bytesRead;
}
int TskImageFileTsk::readFile(const int handle,
const uint64_t byte_offset,
const size_t byte_len,
char * buffer)
{
TskImageFileTsk::OPEN_FILE * openFile = m_openFiles[handle];
if (openFile == NULL || openFile->fsFile == NULL)
{
std::wstringstream errorMsg;
errorMsg << L"TskImageFileTsk::readFile - Either OPEN_FILE or TSK_FS_FILE is null." << std::endl;
LOGERROR(errorMsg.str());
return -1;
}
if (byte_offset >= openFile->fsFile->meta->size)
{
// If the offset is larger than the file then there is nothing left to read.
return 0;
}
int bytesRead = tsk_fs_file_read_type(openFile->fsFile,
static_cast<TSK_FS_ATTR_TYPE_ENUM>(openFile->attrType),
openFile->attrId,
byte_offset, buffer,
byte_len, TSK_FS_FILE_READ_FLAG_NONE);
if (bytesRead == -1)
{
std::wstringstream errorMsg;
errorMsg << L"TskImageFileTsk::readFile - Error reading file: "
<< tsk_error_get() << std::endl;
LOGERROR(errorMsg.str());
}
return bytesRead;
}
