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Add xz support

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topjohnwu
2017-02-28 21:56:13 +08:00
parent 463cbceb07
commit 0d51997e46
4 changed files with 62 additions and 2 deletions
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60
jni/magiskboot/compress.c
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@@ -1,3 +1,6 @@
#include <zlib.h>
#include <lzma.h>
#include "magiskboot.h"
void gzip(int dec, const char* filename, unsigned char* buf, size_t size) {
@@ -25,7 +28,7 @@ void gzip(int dec, const char* filename, unsigned char* buf, size_t size) {
do {
strm.next_in = buf + pos;
if (pos + CHUNK > size) {
if (pos + CHUNK >= size) {
strm.avail_in = size - pos;
pos = size;
flush = Z_FINISH;
@@ -57,3 +60,58 @@ void gzip(int dec, const char* filename, unsigned char* buf, size_t size) {
}
close(fd);
}
void lzma(int dec, const char* filename, unsigned char* buf, size_t size) {
int have, pos = 0;
lzma_ret ret;
lzma_stream strm = LZMA_STREAM_INIT;
lzma_options_lzma opt;
lzma_action action = LZMA_RUN;
unsigned char out[BUFSIZ];
int fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0644);
if (fd < 0)
error(1, "Unable to create %s", filename);
if (dec) {
ret = lzma_auto_decoder(&strm, UINT64_MAX, 0);
} else {
lzma_lzma_preset(&opt, LZMA_PRESET_DEFAULT);
lzma_filter filters[] = {
{ .id = LZMA_FILTER_LZMA2, .options = &opt },
{ .id = LZMA_VLI_UNKNOWN, .options = NULL },
};
ret = lzma_stream_encoder(&strm, filters, LZMA_CHECK_CRC64);
}
if (ret != LZMA_OK)
error(1, "Unable to init lzma");
do {
strm.next_in = buf + pos;
if (pos + BUFSIZ >= size) {
strm.avail_in = size - pos;
pos = size;
action = LZMA_FINISH;
} else {
strm.avail_in = BUFSIZ;
pos += BUFSIZ;
}
do {
strm.avail_out = BUFSIZ;
strm.next_out = out;
ret = lzma_code(&strm, action);
have = BUFSIZ - strm.avail_out;
if (write(fd, out, have) != have)
error(1, "Error in writing %s", filename);
} while (strm.avail_out == 0 && ret == LZMA_OK);
if (ret != LZMA_OK && ret != LZMA_STREAM_END)
error(1, "LZMA error %d!", ret);
} while (pos < size);
lzma_end(&strm);
}