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| author | Dean Rasheed <dean.a.rasheed@gmail.com> | 2023-02-03 11:09:15 +0000 |
|---|---|---|
| committer | Dean Rasheed <dean.a.rasheed@gmail.com> | 2023-02-03 11:09:15 +0000 |
| commit | 86bfbeab4f439ad527318d9edeb3c71ea46c1ab3 (patch) | |
| tree | 15b2510ba9571491633591a54d58ba2e8f436fa5 /src/backend/utils/adt/jsonfuncs.c | |
| parent | 89d28f928c402e9f1890ece4d787825a6c51c2ca (diff) | |
| download | postgresql-86bfbeab4f439ad527318d9edeb3c71ea46c1ab3.tar.gz postgresql-86bfbeab4f439ad527318d9edeb3c71ea46c1ab3.zip | |
Make int64_div_fast_to_numeric() more robust.
The prior coding of int64_div_fast_to_numeric() had a number of bugs
that would cause it to fail under different circumstances, such as
with log10val2 <= 0, or log10val2 a multiple of 4, or in the "slow"
numeric path with log10val2 >= 10.
None of those could be triggered by any of our current code, which
only uses log10val2 = 3 or 6. However, they made it a hazard for any
future code that might use it. Also, since this is exported by
numeric.c, users writing their own C code might choose to use it.
Therefore fix, and back-patch to v14, where it was introduced.
Dean Rasheed, reviewed by Tom Lane.
Discussion: https://postgr.es/m/CAEZATCW8gXgW0tgPxPgHDPhVX71%2BSWFRkhnXy%2BTfGDsKLepu2g%40mail.gmail.com
Diffstat (limited to 'src/backend/utils/adt/jsonfuncs.c')
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