/*
* Uncompress an entry, in its entirety, to an open file descriptor.
*
* TODO: this doesn't verify the data's CRC, but probably should (especially
* for uncompressed data).
*/
bool dexZipExtractEntryToFile(const ZipArchive* pArchive,
const ZipEntry entry, int fd)
{
bool result = false;
int ent = entryToIndex(pArchive, entry);
if (ent < 0)
return -1;
const unsigned char* basePtr = (const unsigned char*)pArchive->mMap.addr;
int method;
long uncompLen, compLen;
off_t offset;
if (!dexZipGetEntryInfo(pArchive, entry, &method, &uncompLen, &compLen,
&offset, NULL, NULL))
{
goto bail;
}
if (method == kCompressStored) {
ssize_t actual;
actual = write(fd, basePtr + offset, uncompLen);
if (actual < 0) {
LOGE("Write failed: %s\n", strerror(errno));
goto bail;
} else if (actual != uncompLen) {
LOGE("Partial write during uncompress (%d of %ld)\n",
(int) actual, uncompLen);
goto bail;
} else {
LOGI("+++ successful write\n");
}
} else {
if (!inflateToFile(fd, basePtr+offset, uncompLen, compLen))
goto bail;
}
result = true;
bail:
return result;
}
/*
* Uncompress an entry, in its entirety, to an open file descriptor.
*
* TODO: this doesn't verify the data's CRC, but probably should (especially
* for uncompressed data).
*/
int dexZipExtractEntryToFile(const ZipArchive* pArchive,
const ZipEntry entry, int fd)
{
int result = -1;
int ent = entryToIndex(pArchive, entry);
if (ent < 0) {
LOGW("Zip: extract can't find entry %p\n", entry);
goto bail;
}
int method;
size_t uncompLen, compLen;
off_t dataOffset;
if (dexZipGetEntryInfo(pArchive, entry, &method, &uncompLen, &compLen,
&dataOffset, NULL, NULL) != 0)
{
goto bail;
}
if (lseek(pArchive->mFd, dataOffset, SEEK_SET) != dataOffset) {
LOGW("Zip: lseek to data at %ld failed\n", (long) dataOffset);
goto bail;
}
if (method == kCompressStored) {
if (copyFileToFile(pArchive->mFd, fd, uncompLen) != 0)
goto bail;
} else {
if (inflateToFile(pArchive->mFd, fd, uncompLen, compLen) != 0)
goto bail;
}
result = 0;
bail:
return result;
}
