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Move pg_lzcompress.c to src/common.

Browse Source 
Exposing compression and decompression APIs of pglz makes possible its
use by extensions and contrib modules. pglz_decompress contained a call
to elog to emit an error message in case of corrupted data. This function
is changed to return a status code to let its callers return an error instead.

This commit is required for upcoming WAL compression feature so that
the WAL reader facility can decompress the WAL data by using pglz_decompress.

Michael Paquier
This commit is contained in:
Fujii Masao
2014-12-25 20:46:14 +09:00
parent 5b89473d87
commit 60838df922
6 changed files with 29 additions and 17 deletions
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11
src/backend/access/heap/tuptoaster.c
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@ -37,7 +37,7 @@
#include "catalog/catalog.h"
#include "miscadmin.h"
#include "utils/fmgroids.h"
#include "utils/pg_lzcompress.h"
#include "common/pg_lzcompress.h"
#include "utils/rel.h"
#include "utils/typcache.h"
#include "utils/tqual.h"
@ -142,7 +142,8 @@ heap_tuple_untoast_attr(struct varlena * attr)
attr = (struct varlena *) palloc(PGLZ_RAW_SIZE(tmp) + VARHDRSZ);
SET_VARSIZE(attr, PGLZ_RAW_SIZE(tmp) + VARHDRSZ);
pglz_decompress(tmp, VARDATA(attr));
if (!pglz_decompress(tmp, VARDATA(attr)))
elog(ERROR, "compressed data is corrupted");
pfree(tmp);
}
}
@ -167,7 +168,8 @@ heap_tuple_untoast_attr(struct varlena * attr)
attr = (struct varlena *) palloc(PGLZ_RAW_SIZE(tmp) + VARHDRSZ);
SET_VARSIZE(attr, PGLZ_RAW_SIZE(tmp) + VARHDRSZ);
pglz_decompress(tmp, VARDATA(attr));
if (!pglz_decompress(tmp, VARDATA(attr)))
elog(ERROR, "compressed data is corrupted");
}
else if (VARATT_IS_SHORT(attr))
{
@ -239,7 +241,8 @@ heap_tuple_untoast_attr_slice(struct varlena * attr,
preslice = (struct varlena *) palloc(size);
SET_VARSIZE(preslice, size);
pglz_decompress(tmp, VARDATA(preslice));
if (!pglz_decompress(tmp, VARDATA(preslice)))
elog(ERROR, "compressed data is corrupted");
if (tmp != (PGLZ_Header *) attr)
pfree(tmp);