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Add repalloc0 and repalloc0_array

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These zero out the space added by repalloc.  This is a common pattern
that is quite hairy to code by hand.

Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://www.postgresql.org/message-id/b66dfc89-9365-cb57-4e1f-b7d31813eeec@enterprisedb.com
This commit is contained in:
Peter Eisentraut
2022-11-12 20:31:27 +01:00
parent 30d98e14a8
commit b4b7ce8061
10 changed files with 48 additions and 71 deletions
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9
src/backend/libpq/be-fsstubs.c
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@@ -696,19 +696,16 @@ newLOfd(void)
newsize = 64;
cookies = (LargeObjectDesc **)
MemoryContextAllocZero(fscxt, newsize * sizeof(LargeObjectDesc *));
cookies_size = newsize;
}
else
{
/* Double size of array */
i = cookies_size;
newsize = cookies_size * 2;
cookies = (LargeObjectDesc **)
repalloc(cookies, newsize * sizeof(LargeObjectDesc *));
MemSet(cookies + cookies_size, 0,
(newsize - cookies_size) * sizeof(LargeObjectDesc *));
cookies_size = newsize;
cookies =
repalloc0_array(cookies, LargeObjectDesc *, cookies_size, newsize);
}
cookies_size = newsize;
return i;
}