gunzip
gunzip();
gunzip();
void gunzip(void *dst, int dstlen, unsigned char *src, int *lenp);
int gunzip(unsigned char *inbuf, long len,
{ .magic = {0x1f, 0x8b}, .name = "gzip", .decompressor = gunzip },
{ .magic = {0x1f, 0x9e}, .name = "gzip", .decompressor = gunzip },