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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/utils/adt/ruleutils.c
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@ -4855,14 +4855,9 @@ expand_colnames_array_to(deparse_columns *colinfo, int n)
if (n > colinfo->num_cols)
{
if (colinfo->colnames == NULL)
colinfo->colnames = (char **) palloc0(n * sizeof(char *));
colinfo->colnames = palloc0_array(char *, n);
else
{
colinfo->colnames = (char **) repalloc(colinfo->colnames,
n * sizeof(char *));
memset(colinfo->colnames + colinfo->num_cols, 0,
(n - colinfo->num_cols) * sizeof(char *));
}
colinfo->colnames = repalloc0_array(colinfo->colnames, char *, colinfo->num_cols, n);
colinfo->num_cols = n;
}
}