60 lines
1.2 KiB
C
60 lines
1.2 KiB
C
|
#include "magiskboot.h"
|
||
|
|
|
||
|
|
void gzip(int dec, const char* filename, unsigned char* buf, size_t size) {
|
||
|
|
int ret, flush, have, pos = 0;
|
||
|
|
z_stream strm;
|
||
|
|
unsigned char out[CHUNK];
|
||
|
|
|
||
|
|
int fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0644);
|
||
|
|
|
||
|
|
if (fd < 0)
|
||
|
|
error(1, "Unable to create %s", filename);
|
||
|
|
|
||
|
|
strm.zalloc = Z_NULL;
|
||
|
|
strm.zfree = Z_NULL;
|
||
|
|
strm.opaque = Z_NULL;
|
||
|
|
|
||
|
|
if (dec) {
|
||
|
|
ret = inflateInit2(&strm, windowBits | ZLIB_GZIP);
|
||
|
|
} else {
|
||
|
|
ret = deflateInit2(&strm, 9, Z_DEFLATED, windowBits | ZLIB_GZIP, memLevel, Z_DEFAULT_STRATEGY);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (ret != Z_OK)
|
||
|
|
error(1, "Unable to init zlib");
|
||
|
|
|
||
|
|
do {
|
||
|
|
strm.next_in = buf + pos;
|
||
|
|
if (pos + CHUNK > size) {
|
||
|
|
strm.avail_in = size - pos;
|
||
|
|
pos = size;
|
||
|
|
flush = Z_FINISH;
|
||
|
|
} else {
|
||
|
|
strm.avail_in = CHUNK;
|
||
|
|
pos += CHUNK;
|
||
|
|
flush = Z_NO_FLUSH;
|
||
|
|
}
|
||
|
|
|
||
|
|
do {
|
||
|
|
strm.avail_out = CHUNK;
|
||
|
|
strm.next_out = out;
|
||
|
|
if (dec) {
|
||
|
|
inflate(&strm, flush);
|
||
|
|
} else {
|
||
|
|
deflate(&strm, flush);
|
||
|
|
}
|
||
|
|
have = CHUNK - strm.avail_out;
|
||
|
|
if (write(fd, out, have) != have)
|
||
|
|
error(1, "Error in writing %s", filename);
|
||
|
|
} while (strm.avail_out == 0);
|
||
|
|
|
||
|
|
} while(pos < size);
|
||
|
|
|
||
|
|
if (dec) {
|
||
|
|
inflateEnd(&strm);
|
||
|
|
} else {
|
||
|
|
deflateEnd(&strm);
|
||
|
|
}
|
||
|
|
close(fd);
|
||
|
|
}
|