encoding names v2.

Hi,

all are almost same as in last version of this patch. Here are new
changes:

- aliases cyrillic, cp819, ibm819, isoir100x, l1-4 are removed
- KOI8 is KOI8-R in *all* functions, maps, etc.
- WIN is window-1251 (WIN1251) --- // ---
- ALT is ALT :-)
- UNICODE is utf-8
- PG_ prefix is used for all SQL_ASCII and the others
- fixed bug with --enable-unicode-conversion

- getdatabaseencoding() is compatible with old versions, but
in the code is commented as deprecated.

- getdbencoding() is new function that return correct encoding names

test2=# select getdatabaseencoding(), getdbencoding();
getdatabaseencoding | getdbencoding
---------------------+---------------
LATIN2 | ISO-8859-2
(1 row)

- pg_encoding_to_char() and other routines return new names! Only
for getdatabaseencoding() we keep back compatibility - needful for
JDBC.

- all encoding names use '-'. I hope we will never see a problem with
it and some operator. Encoding names must be used as quoted string.

Only for SQL_ASCII is used '_', because I see that JDBC has hardcoded
"pg_encoding_to_char(1) = 'SQL_ASCII'" :-(((

- the ./configure.in:
* use new encoding names too for --enable-multibyte
* define MULTIBYTE that handle default encoding id
* define MULTIBYTE_NAME that handle default encoding name (neeful
for initdb)

Note: old code use same names for macros and for encoding names, but
now it's in Makefile.global:

MULTIBYTE = PG_KOI8R /* id */
MULTIBYTE_NAME = "KOI8-R" /* name */

- the backend's createdb() function check correct BE encoding (here was
bug)

- 'initdb' check if default template encoding is correct for backend DB.

In the old code it's in initdb very hardcoded. I add to pg_encoding
option '-b' that check if encoding is correct for backend DB (means
encoding is not client only). It's better than
if [ $MULTIBYTEID -gt 31 ]
^^^^^^
in scripts.

For example (Big5 is client only encoding):

$ pg_encoding Big5
16
$ pg_encoding -b Big5
$

- initdb use MULTIBYTE_NAME and "pg_encoding -b"

- ODBC works with old and new names for Shift_JIS and Big5

- the patch doesn't contain docs about encoding names... later :-)

Note for CVS commit:

following files are renamed:

src/utils/mb/Unicode/KOI8_to_utf8.map --> src/utils/mb/Unicode/KOI8R_to_utf8.map
src/utils/mb/Unicode/WIN_to_utf8.map --> src/utils/mb/Unicode/WIN1251_to_utf8.map
src/utils/mb/Unicode/utf8_to_KOI8.map --> src/utils/mb/Unicode/utf8_to_KOI8R.map
src/utils/mb/Unicode/utf8_to_WIN.map --> src/utils/mb/Unicode/utf8_to_WIN1251.map

new file:

src/utils/mb/encname.c

removed file:

src/utils/mb/common.c

The patch doesn't contain large configure script, but only configure.in.
Please before "cvs commit" do autoconf!

Thanks for all suggestion.

New comments?

Karel

--
Karel Zak <zakkr(at)zf(dot)jcu(dot)cz>
http://home.zf.jcu.cz/~zakkr/

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