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| author | Tom Lane <tgl@sss.pgh.pa.us> | 2023-05-16 10:53:42 -0400 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2023-05-16 10:53:42 -0400 |
| commit | 0966291a4ade47f7c14313ab7868d1de4e4f6688 (patch) | |
| tree | 9c4e818440f34d755c89bf31316a2f2f6cf7de4c /contrib/intarray/_int_gist.c | |
| parent | 3282e071bc594923f5d5f09c6f5b548e425a558a (diff) | |
| download | postgresql-0966291a4ade47f7c14313ab7868d1de4e4f6688.tar.gz postgresql-0966291a4ade47f7c14313ab7868d1de4e4f6688.zip | |
Ensure Soundex difference() function handles empty input sanely.
fuzzystrmatch's difference() function assumes that _soundex()
always initializes its output buffer fully. This was not so for
the case of a string containing no alphabetic characters, resulting
in unstable output and Valgrind complaints.
Fix by using memset() to fill the whole buffer in the early-exit
case. Also make some cosmetic improvements (I didn't care for the
random switches between "instr[0]" and "*instr" notation).
Report and diagnosis by Alexander Lakhin (bug #17935).
Back-patch to all supported branches.
Discussion: https://postgr.es/m/17935-b99316aa79c18513@postgresql.org
Diffstat (limited to 'contrib/intarray/_int_gist.c')
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