Обсуждение: pgsql: Add wchar -> mb conversion routines.

Add wchar -> mb conversion routines.

This is infrastructure for Alexander Korotkov's work on indexing regular
expression searches.

Alexander Korotkov, with a bit of further hackery on the MULE conversion
by me

Branch
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master

Details
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http://git.postgresql.org/pg/commitdiff/72dd6291f216440f6bb61a8733729a37c7e3b2d2

Modified Files
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src/backend/utils/mb/mbutils.c |   22 ++++
src/backend/utils/mb/wchar.c   |  247 +++++++++++++++++++++++++++++++++-------
src/include/mb/pg_wchar.h      |   24 ++++-
3 files changed, 248 insertions(+), 45 deletions(-)