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fix packExtent checksums and lengths (of uncompressed data) for 0!=hdr_ulen

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committer: jreiser <jreiser> 1141241763 +0000
This commit is contained in:
John Reiser 2006-03-01 19:36:03 +00:00
parent 55ef94abcd
commit d461ebbda1
1 changed files with 10 additions and 0 deletions
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10
src/p_unix.cpp
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@ -308,6 +308,8 @@ void PackUnix::packExtent(
unsigned hdr_ulen
)
{
unsigned const init_u_adler = ph.u_adler;
unsigned const init_c_adler = ph.c_adler;
MemBuffer hdr_ibuf;
if (hdr_ulen) {
hdr_ibuf.alloc(hdr_ulen);
@ -361,6 +363,7 @@ void PackUnix::packExtent(
if (ph.c_len >= ph.u_len) {
// block is not compressible
ph.c_len = ph.u_len;
memcpy(obuf, ibuf, ph.c_len);
// must update checksum of compressed data
ph.c_adler = upx_adler32(ibuf, ph.u_len, ph.saved_c_adler);
}
@ -376,6 +379,11 @@ void PackUnix::packExtent(
hdr_obuf.allocForCompression(hdr_ulen);
int r = upx_compress(hdr_ibuf, hdr_ulen, hdr_obuf, &hdr_clen, 0,
ph.method, 10, &conf, result);
ph.saved_u_adler = upx_adler32(hdr_ibuf, hdr_ulen, init_u_adler);
ph.saved_c_adler = upx_adler32(hdr_obuf, hdr_clen, init_c_adler);
ph.u_adler = upx_adler32(ibuf, ph.u_len, ph.saved_u_adler);
ph.c_adler = upx_adler32(obuf, ph.c_len, ph.saved_c_adler);
end_u_adler = ph.u_adler;
memset(&tmp, 0, sizeof(tmp));
set_native32(&tmp.sz_unc, hdr_ulen);
set_native32(&tmp.sz_cpr, hdr_clen);
@ -383,6 +391,8 @@ void PackUnix::packExtent(
fo->write(&tmp, sizeof(tmp));
b_len += sizeof(b_info);
fo->write(hdr_obuf, hdr_clen);
total_out += hdr_clen;
total_in += hdr_ulen;
hdr_ulen = 0; // compress hdr one time only
}
memset(&tmp, 0, sizeof(tmp));