forked from MarcoBuster/Magisk
Migrate to generic stream implementation
This commit is contained in:
topjohnwu
parent
4f9a25ee89
commit
d26d804cc2
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@ -21,19 +21,18 @@ using namespace std;
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uint32_t dyn_img_hdr::j32 = 0;
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uint64_t dyn_img_hdr::j64 = 0;
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static int64_t one_step(unique_ptr<Compression> &&ptr, int fd, const void *in, size_t size) {
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ptr->setOut(make_unique<FDOutStream>(fd));
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if (!ptr->write(in, size))
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return -1;
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return ptr->finalize();
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}
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static int64_t decompress(format_t type, int fd, const void *in, size_t size) {
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return one_step(unique_ptr<Compression>(get_decoder(type)), fd, in, size);
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static void decompress(format_t type, int fd, const void *in, size_t size) {
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unique_ptr<stream> ptr(get_decoder(type, open_stream<fd_stream>(fd)));
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ptr->write(in, size);
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}
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static int64_t compress(format_t type, int fd, const void *in, size_t size) {
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return one_step(unique_ptr<Compression>(get_encoder(type)), fd, in, size);
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auto prev = lseek(fd, 0, SEEK_CUR);
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unique_ptr<stream> ptr(get_encoder(type, open_stream<fd_stream>(fd)));
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ptr->write(in, size);
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ptr->close();
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auto now = lseek(fd, 0, SEEK_CUR);
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return now - prev;
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}
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static void dump(void *buf, size_t size, const char *filename) {
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File diff suppressed because it is too large
Load Diff
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@ -1,174 +1,10 @@
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#pragma once
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#include <zlib.h>
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#include <bzlib.h>
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#include <lzma.h>
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#include <lz4.h>
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#include <lz4frame.h>
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#include <lz4hc.h>
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#include <stream.h>
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#include "format.h"
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#define CHUNK 0x40000
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class Compression : public FilterOutStream {
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public:
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virtual uint64_t finalize() = 0;
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};
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class GZStream : public Compression {
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public:
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bool write(const void *in, size_t size) override;
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uint64_t finalize() override;
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protected:
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explicit GZStream(int mode);
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private:
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int mode;
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z_stream strm;
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uint8_t outbuf[CHUNK];
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bool write(const void *in, size_t size, int flush);
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};
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class GZDecoder : public GZStream {
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public:
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GZDecoder() : GZStream(0) {};
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};
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class GZEncoder : public GZStream {
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public:
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GZEncoder() : GZStream(1) {};
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};
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class BZStream : public Compression {
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public:
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bool write(const void *in, size_t size) override;
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uint64_t finalize() override;
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protected:
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explicit BZStream(int mode);
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private:
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int mode;
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bz_stream strm;
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char outbuf[CHUNK];
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bool write(const void *in, size_t size, int flush);
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};
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class BZDecoder : public BZStream {
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public:
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BZDecoder() : BZStream(0) {};
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};
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class BZEncoder : public BZStream {
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public:
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BZEncoder() : BZStream(1) {};
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};
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class LZMAStream : public Compression {
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public:
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bool write(const void *in, size_t size) override;
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uint64_t finalize() override;
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protected:
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explicit LZMAStream(int mode);
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private:
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int mode;
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lzma_stream strm;
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uint8_t outbuf[CHUNK];
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bool write(const void *in, size_t size, lzma_action flush);
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};
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class LZMADecoder : public LZMAStream {
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public:
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LZMADecoder() : LZMAStream(0) {}
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};
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class XZEncoder : public LZMAStream {
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public:
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XZEncoder() : LZMAStream(1) {}
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};
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class LZMAEncoder : public LZMAStream {
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public:
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LZMAEncoder() : LZMAStream(2) {}
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};
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class LZ4FDecoder : public Compression {
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public:
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LZ4FDecoder();
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~LZ4FDecoder() override;
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bool write(const void *in, size_t size) override;
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uint64_t finalize() override;
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private:
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LZ4F_decompressionContext_t ctx;
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uint8_t *outbuf;
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size_t outCapacity;
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uint64_t total;
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void read_header(const uint8_t *&in, size_t &size);
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};
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class LZ4FEncoder : public Compression {
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public:
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LZ4FEncoder();
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~LZ4FEncoder() override;
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bool write(const void *in, size_t size) override;
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uint64_t finalize() override;
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private:
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static constexpr size_t BLOCK_SZ = 1 << 22;
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LZ4F_compressionContext_t ctx;
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uint8_t *outbuf;
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size_t outCapacity;
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uint64_t total;
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void write_header();
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};
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#define LZ4_UNCOMPRESSED 0x800000
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#define LZ4_COMPRESSED LZ4_COMPRESSBOUND(LZ4_UNCOMPRESSED)
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class LZ4Decoder : public Compression {
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public:
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LZ4Decoder();
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~LZ4Decoder() override;
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bool write(const void *in, size_t size) override;
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uint64_t finalize() override;
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private:
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char *outbuf;
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char *buf;
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bool init;
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unsigned block_sz;
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int buf_off;
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uint64_t total;
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};
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class LZ4Encoder : public Compression {
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public:
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LZ4Encoder();
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~LZ4Encoder() override;
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bool write(const void *in, size_t size) override;
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uint64_t finalize() override;
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private:
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char *outbuf;
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char *buf;
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bool init;
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int buf_off;
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uint64_t out_total;
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unsigned in_total;
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};
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Compression *get_encoder(format_t type);
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Compression *get_decoder(format_t type);
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filter_stream *get_encoder(format_t type, FILE *fp = nullptr);
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filter_stream *get_decoder(format_t type, FILE *fp = nullptr);
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void compress(const char *method, const char *infile, const char *outfile);
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void decompress(char *infile, const char *outfile);
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@ -241,14 +241,17 @@ void magisk_cpio::compress() {
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return;
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fprintf(stderr, "Compressing cpio -> [%s]\n", RAMDISK_XZ);
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auto init = entries.extract("init");
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XZEncoder encoder;
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encoder.setOut(make_unique<BufOutStream>());
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output(encoder);
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encoder.finalize();
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uint8_t *data;
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size_t len;
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FILE *fp = open_stream(get_encoder(XZ, open_stream<byte_stream>(data, len)));
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dump(fp);
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entries.clear();
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entries.insert(std::move(init));
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auto xz = new cpio_entry(RAMDISK_XZ, S_IFREG);
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static_cast<BufOutStream *>(encoder.getOut())->release(xz->data, xz->filesize);
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xz->data = data;
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xz->filesize = len;
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insert(xz);
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}
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@ -257,15 +260,16 @@ void magisk_cpio::decompress() {
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if (it == entries.end())
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return;
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fprintf(stderr, "Decompressing cpio [%s]\n", RAMDISK_XZ);
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LZMADecoder decoder;
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decoder.setOut(make_unique<BufOutStream>());
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decoder.write(it->second->data, it->second->filesize);
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decoder.finalize();
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char *data;
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size_t len;
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auto strm = get_decoder(XZ, open_stream<byte_stream>(data, len));
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strm->write(it->second->data, it->second->filesize);
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delete strm;
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entries.erase(it);
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char *buf;
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size_t sz;
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static_cast<BufOutStream *>(decoder.getOut())->getbuf(buf, sz);
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load_cpio(buf, sz);
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load_cpio(data, len);
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free(data);
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}
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int cpio_commands(int argc, char *argv[]) {
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@ -338,4 +342,4 @@ int cpio_commands(int argc, char *argv[]) {
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cpio.dump(incpio);
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return 0;
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}
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}
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@ -49,8 +49,7 @@ cpio_entry_base::cpio_entry_base(const cpio_newc_header *h)
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void cpio::dump(const char *file) {
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fprintf(stderr, "Dump cpio: [%s]\n", file);
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FDOutStream fd_out(xopen(file, O_WRONLY | O_CREAT | O_TRUNC, 0644), true);
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output(fd_out);
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dump(xfopen(file, "we"));
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}
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void cpio::rm(entry_map::iterator &it) {
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@ -110,9 +109,9 @@ bool cpio::exists(const char *name) {
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return entries.count(name) != 0;
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}
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#define do_out(b, l) out.write(b, l); pos += (l)
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#define out_align() out.write(zeros, align_off(pos, 4)); pos = do_align(pos, 4)
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void cpio::output(OutStream &out) {
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#define do_out(buf, len) pos += fwrite(buf, len, 1, out);
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#define out_align() do_out(zeros, align_off(pos, 4))
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void cpio::dump(FILE *out) {
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size_t pos = 0;
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unsigned inode = 300000;
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char header[111];
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@ -147,6 +146,7 @@ void cpio::output(OutStream &out) {
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do_out(header, 110);
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do_out("TRAILER!!!\0", 11);
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out_align();
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fclose(out);
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}
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cpio_rw::cpio_rw(const char *file) {
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@ -221,12 +221,12 @@ bool cpio_rw::mv(const char *from, const char *to) {
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#define pos_align(p) p = do_align(p, 4)
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void cpio_rw::load_cpio(char *buf, size_t sz) {
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void cpio_rw::load_cpio(const char *buf, size_t sz) {
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size_t pos = 0;
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cpio_newc_header *header;
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const cpio_newc_header *header;
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unique_ptr<cpio_entry> entry;
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while (pos < sz) {
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header = (cpio_newc_header *)(buf + pos);
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header = reinterpret_cast<const cpio_newc_header *>(buf + pos);
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entry = make_unique<cpio_entry>(header);
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pos += sizeof(*header);
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string_view name_view(buf + pos);
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@ -30,7 +30,7 @@ struct cpio_entry : public cpio_entry_base {
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explicit cpio_entry(const char *name, uint32_t mode) : filename(name) {
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this->mode = mode;
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}
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explicit cpio_entry(cpio_newc_header *h) : cpio_entry_base(h) {}
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explicit cpio_entry(const cpio_newc_header *h) : cpio_entry_base(h) {}
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~cpio_entry() override { free(data); };
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};
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@ -48,7 +48,7 @@ public:
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protected:
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entry_map entries;
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void rm(entry_map::iterator &it);
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void output(OutStream &out);
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void dump(FILE *out);
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};
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class cpio_rw : public cpio {
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@ -64,7 +64,7 @@ public:
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protected:
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void insert(cpio_entry *e);
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void mv(entry_map::iterator &it, const char *to);
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void load_cpio(char *buf, size_t sz);
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void load_cpio(const char *buf, size_t sz);
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};
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class cpio_mmap : public cpio {
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@ -15,8 +15,6 @@ FILE *open_stream(Args &&... args) {
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return open_stream(new T(args...));
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}
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/* Base classes */
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class stream {
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public:
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virtual int read(void *buf, size_t len);
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@ -26,17 +24,17 @@ public:
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virtual ~stream() = default;
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};
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// Delegates all operations to the base FILE pointer
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class filter_stream : public stream {
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public:
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filter_stream(FILE *fp) : fp(fp) {}
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int close() override { return fclose(fp); }
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virtual ~filter_stream() { close(); }
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~filter_stream() override { if (fp) close(); }
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void set_base(FILE *f) {
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if (fp) fclose(fp);
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fp = f;
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}
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int read(void *buf, size_t len) override;
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int write(const void *buf, size_t len) override;
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int close() override;
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void set_base(FILE *f);
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template <class T, class... Args >
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void set_base(Args&&... args) {
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set_base(open_stream<T>(args...));
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@ -46,18 +44,7 @@ protected:
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FILE *fp;
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};
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class filter_in_stream : public filter_stream {
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public:
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filter_in_stream(FILE *fp = nullptr) : filter_stream(fp) {}
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int read(void *buf, size_t len) override { return fread(buf, len, 1, fp); }
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};
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class filter_out_stream : public filter_stream {
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public:
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filter_out_stream(FILE *fp = nullptr) : filter_stream(fp) {}
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int write(const void *buf, size_t len) override { return fwrite(buf, len, 1, fp); }
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};
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// Handy interface for classes that need custom seek logic
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class seekable_stream : public stream {
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protected:
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size_t _pos = 0;
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@ -66,8 +53,7 @@ protected:
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virtual size_t end_pos() = 0;
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};
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/* Concrete classes */
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// Byte stream that dynamically allocates memory
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class byte_stream : public seekable_stream {
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public:
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byte_stream(uint8_t *&buf, size_t &len);
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@ -76,7 +62,6 @@ public:
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int read(void *buf, size_t len) override;
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int write(const void *buf, size_t len) override;
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off_t seek(off_t off, int whence) override;
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virtual ~byte_stream() = default;
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private:
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uint8_t *&_buf;
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@ -87,101 +72,14 @@ private:
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size_t end_pos() override { return _len; }
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};
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class fd_stream : stream {
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// File stream but does not close the file descriptor at any time
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class fd_stream : public stream {
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public:
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fd_stream(int fd) : fd(fd) {}
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int read(void *buf, size_t len) override;
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int write(const void *buf, size_t len) override;
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off_t seek(off_t off, int whence) override;
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virtual ~fd_stream() = default;
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private:
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int fd;
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};
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/* TODO: Replace classes below to new implementation */
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class OutStream {
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public:
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virtual bool write(const void *buf, size_t len) = 0;
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virtual ~OutStream() = default;
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};
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typedef std::unique_ptr<OutStream> strm_ptr;
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class FilterOutStream : public OutStream {
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public:
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FilterOutStream() = default;
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FilterOutStream(strm_ptr &&ptr) : out(std::move(ptr)) {}
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void setOut(strm_ptr &&ptr) { out = std::move(ptr); }
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OutStream *getOut() { return out.get(); }
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bool write(const void *buf, size_t len) override {
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return out ? out->write(buf, len) : false;
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}
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protected:
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strm_ptr out;
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};
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class FDOutStream : public OutStream {
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public:
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FDOutStream(int fd, bool close = false) : fd(fd), close(close) {}
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bool write(const void *buf, size_t len) override {
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return ::write(fd, buf, len) == len;
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}
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~FDOutStream() override {
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if (close)
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::close(fd);
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}
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protected:
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int fd;
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bool close;
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};
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class BufOutStream : public OutStream {
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public:
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BufOutStream() : buf(nullptr), off(0), cap(0) {};
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bool write(const void *b, size_t len) override {
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bool resize = false;
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while (off + len > cap) {
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cap = cap ? cap << 1 : 1 << 19;
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resize = true;
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}
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if (resize)
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buf = (char *) xrealloc(buf, cap);
|
||||
memcpy(buf + off, b, len);
|
||||
off += len;
|
||||
return true;
|
||||
}
|
||||
|
||||
template <typename bytes, typename length>
|
||||
void release(bytes *&b, length &len) {
|
||||
b = buf;
|
||||
len = off;
|
||||
buf = nullptr;
|
||||
off = cap = 0;
|
||||
}
|
||||
|
||||
template <typename bytes, typename length>
|
||||
void getbuf(bytes *&b, length &len) const {
|
||||
b = buf;
|
||||
len = off;
|
||||
}
|
||||
|
||||
~BufOutStream() override {
|
||||
free(buf);
|
||||
}
|
||||
|
||||
protected:
|
||||
char *buf;
|
||||
size_t off;
|
||||
size_t cap;
|
||||
};
|
||||
|
|
|
|||
|
|
@ -49,6 +49,25 @@ int stream::close() {
|
|||
return 0;
|
||||
}
|
||||
|
||||
int filter_stream::read(void *buf, size_t len) {
|
||||
return fread(buf, len, 1, fp);
|
||||
}
|
||||
|
||||
int filter_stream::write(const void *buf, size_t len) {
|
||||
return fwrite(buf, len, 1, fp);
|
||||
}
|
||||
|
||||
int filter_stream::close() {
|
||||
int ret = fclose(fp);
|
||||
fp = nullptr;
|
||||
return ret;
|
||||
}
|
||||
|
||||
void filter_stream::set_base(FILE *f) {
|
||||
if (fp) fclose(fp);
|
||||
fp = f;
|
||||
}
|
||||
|
||||
off_t seekable_stream::new_pos(off_t off, int whence) {
|
||||
off_t new_pos;
|
||||
switch (whence) {
|
||||
|
|
|
|||
Loading…
Reference in New Issue