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Make lz4_lg an exception of lz4_legacy

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This commit is contained in:
topjohnwu
2020-10-14 23:45:06 -07:00
parent 872c55207c
commit f3cd4da026
5 changed files with 40 additions and 13 deletions
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14
native/jni/magiskboot/compress.cpp
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@@ -447,9 +447,9 @@ private:
class LZ4_encoder : public cpr_stream {
public:
explicit LZ4_encoder(stream_ptr &&base)
explicit LZ4_encoder(stream_ptr &&base, bool lg)
: cpr_stream(std::move(base)), outbuf(new char[LZ4_COMPRESSED]),
buf(new char[LZ4_UNCOMPRESSED]), init(false), buf_off(0), in_total(0) {}
buf(new char[LZ4_UNCOMPRESSED]), init(false), lg(lg), buf_off(0), in_total(0) {}
int write(const void *in, size_t size) override {
int ret = 0;
@@ -490,7 +490,8 @@ public:
~LZ4_encoder() override {
if (buf_off)
write_block();
bwrite(&in_total, sizeof(in_total));
if (lg)
bwrite(&in_total, sizeof(in_total));
delete[] outbuf;
delete[] buf;
}
@@ -499,11 +500,12 @@ private:
char *outbuf;
char *buf;
bool init;
bool lg;
int buf_off;
unsigned in_total;
int write_block() {
int written = LZ4_compress_HC(buf, outbuf, buf_off, LZ4_COMPRESSED, 9);
int written = LZ4_compress_HC(buf, outbuf, buf_off, LZ4_COMPRESSED, LZ4HC_CLEVEL_MAX);
if (written == 0) {
LOGW("LZ4HC compression failure\n");
return -1;
@@ -525,7 +527,9 @@ stream_ptr get_encoder(format_t type, stream_ptr &&base) {
case LZ4:
return make_unique<LZ4F_encoder>(std::move(base));
case LZ4_LEGACY:
return make_unique<LZ4_encoder>(std::move(base));
return make_unique<LZ4_encoder>(std::move(base), false);
case LZ4_LG:
return make_unique<LZ4_encoder>(std::move(base), true);
case GZIP:
default:
return make_unique<gz_encoder>(std::move(base));