Fix output of ISBN-13 numbers beginning with 979.
An EAN beginning with 979 (but not 9790 - those are ISMN's) are accepted
as ISBN numbers, but they cannot be represented in the old, 10-digit ISBN
format. They must be output in the new 13-digit ISBN-13 format. We printed
out an incorrect value for those.
Also add a regression test, to test this and some other basic functionality
of the module.
Patch by Fabien Coelho. This fixes bug #13442, reported by B.Z. Backpatch
to 9.1, where we started to recognize ISBN-13 numbers.
Branch
------
REL9_5_STABLE
Details
-------
http://git.postgresql.org/pg/commitdiff/ea8385df6ce95507951f6c12fa4defb5b3ba9cda
Modified Files
--------------
contrib/isn/Makefile | 2 +
contrib/isn/expected/isn.out | 222 ++++++++++++++++++++++++++++++++++++++++++
contrib/isn/isn.c | 27 +++--
contrib/isn/sql/isn.sql | 104 ++++++++++++++++++++
4 files changed, 345 insertions(+), 10 deletions(-)