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Revert "Fix corner case with PGP decompression in pgcrypto"

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This reverts commit 9e10898, after finding out that buildfarm members
running SLES 15 on z390 complain on the compression and decompression
logic of the new test: pipistrelles, barbthroat and steamerduck.

Those hosts are visibly using hardware-specific changes to improve zlib
performance, requiring more investigation.

Thanks to Tom Lane for the discussion.

Discussion: https://postgr.es/m/20200722093749.GA2564@paquier.xyz
Backpatch-through: 9.5
This commit is contained in:
Michael Paquier
2020-07-23 08:29:18 +09:00
parent bba2e66aec
commit e30a63f258
3 changed files with 11 additions and 62 deletions
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22
contrib/pgcrypto/pgp-compress.c
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@ -244,17 +244,6 @@ decompress_read(void *priv, PullFilter *src, int len,
struct DecomprData *dec = priv;
restart:
if (dec->stream.avail_in == 0)
{
uint8 *tmp;
res = pullf_read(src, 8192, &tmp);
if (res < 0)
return res;
dec->stream.next_in = tmp;
dec->stream.avail_in = res;
}
if (dec->buf_data > 0)
{
if (len > dec->buf_data)
@ -268,6 +257,17 @@ restart:
if (dec->eof)
return 0;
if (dec->stream.avail_in == 0)
{
uint8 *tmp;
res = pullf_read(src, 8192, &tmp);
if (res < 0)
return res;
dec->stream.next_in = tmp;
dec->stream.avail_in = res;
}
dec->stream.next_out = dec->buf;
dec->stream.avail_out = dec->buf_len;
dec->pos = dec->buf;