598 lines
13 KiB
C
598 lines
13 KiB
C
/*-------------------------------------------------------------------------
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*
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* encnames.c
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* Encoding names and routines for working with them.
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*
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* Portions Copyright (c) 2001-2024, PostgreSQL Global Development Group
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*
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* IDENTIFICATION
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* src/common/encnames.c
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*
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*-------------------------------------------------------------------------
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*/
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#include "c.h"
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#include <ctype.h>
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#include <unistd.h>
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#include "mb/pg_wchar.h"
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/* ----------
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* All encoding names, sorted: *** A L P H A B E T I C ***
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*
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* All names must be without irrelevant chars, search routines use
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* isalnum() chars only. It means ISO-8859-1, iso_8859-1 and Iso8859_1
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* are always converted to 'iso88591'. All must be lower case.
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*
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* The table doesn't contain 'cs' aliases (like csISOLatin1). It's needed?
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*
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* Karel Zak, Aug 2001
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* ----------
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*/
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typedef struct pg_encname
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{
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const char *name;
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pg_enc encoding;
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} pg_encname;
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static const pg_encname pg_encname_tbl[] =
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{
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{
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"abc", PG_WIN1258
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}, /* alias for WIN1258 */
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{
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"alt", PG_WIN866
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}, /* IBM866 */
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{
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"big5", PG_BIG5
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}, /* Big5; Chinese for Taiwan multibyte set */
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{
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"euccn", PG_EUC_CN
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}, /* EUC-CN; Extended Unix Code for simplified
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* Chinese */
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{
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"eucjis2004", PG_EUC_JIS_2004
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}, /* EUC-JIS-2004; Extended UNIX Code fixed
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* Width for Japanese, standard JIS X 0213 */
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{
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"eucjp", PG_EUC_JP
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}, /* EUC-JP; Extended UNIX Code fixed Width for
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* Japanese, standard OSF */
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{
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"euckr", PG_EUC_KR
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}, /* EUC-KR; Extended Unix Code for Korean , KS
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* X 1001 standard */
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{
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"euctw", PG_EUC_TW
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}, /* EUC-TW; Extended Unix Code for
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*
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* traditional Chinese */
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{
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"gb18030", PG_GB18030
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}, /* GB18030;GB18030 */
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{
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"gbk", PG_GBK
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}, /* GBK; Chinese Windows CodePage 936
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* simplified Chinese */
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{
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"iso88591", PG_LATIN1
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}, /* ISO-8859-1; RFC1345,KXS2 */
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{
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"iso885910", PG_LATIN6
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}, /* ISO-8859-10; RFC1345,KXS2 */
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{
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"iso885913", PG_LATIN7
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}, /* ISO-8859-13; RFC1345,KXS2 */
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{
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"iso885914", PG_LATIN8
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}, /* ISO-8859-14; RFC1345,KXS2 */
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{
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"iso885915", PG_LATIN9
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}, /* ISO-8859-15; RFC1345,KXS2 */
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{
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"iso885916", PG_LATIN10
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}, /* ISO-8859-16; RFC1345,KXS2 */
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{
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"iso88592", PG_LATIN2
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}, /* ISO-8859-2; RFC1345,KXS2 */
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{
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"iso88593", PG_LATIN3
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}, /* ISO-8859-3; RFC1345,KXS2 */
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{
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"iso88594", PG_LATIN4
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}, /* ISO-8859-4; RFC1345,KXS2 */
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{
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"iso88595", PG_ISO_8859_5
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}, /* ISO-8859-5; RFC1345,KXS2 */
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{
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"iso88596", PG_ISO_8859_6
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}, /* ISO-8859-6; RFC1345,KXS2 */
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{
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"iso88597", PG_ISO_8859_7
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}, /* ISO-8859-7; RFC1345,KXS2 */
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{
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"iso88598", PG_ISO_8859_8
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}, /* ISO-8859-8; RFC1345,KXS2 */
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{
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"iso88599", PG_LATIN5
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}, /* ISO-8859-9; RFC1345,KXS2 */
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{
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"johab", PG_JOHAB
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}, /* JOHAB; Extended Unix Code for simplified
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* Chinese */
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{
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"koi8", PG_KOI8R
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}, /* _dirty_ alias for KOI8-R (backward
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* compatibility) */
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{
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"koi8r", PG_KOI8R
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}, /* KOI8-R; RFC1489 */
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{
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"koi8u", PG_KOI8U
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}, /* KOI8-U; RFC2319 */
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{
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"latin1", PG_LATIN1
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}, /* alias for ISO-8859-1 */
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{
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"latin10", PG_LATIN10
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}, /* alias for ISO-8859-16 */
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{
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"latin2", PG_LATIN2
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}, /* alias for ISO-8859-2 */
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{
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"latin3", PG_LATIN3
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}, /* alias for ISO-8859-3 */
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{
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"latin4", PG_LATIN4
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}, /* alias for ISO-8859-4 */
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{
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"latin5", PG_LATIN5
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}, /* alias for ISO-8859-9 */
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{
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"latin6", PG_LATIN6
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}, /* alias for ISO-8859-10 */
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{
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"latin7", PG_LATIN7
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}, /* alias for ISO-8859-13 */
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{
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"latin8", PG_LATIN8
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}, /* alias for ISO-8859-14 */
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{
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"latin9", PG_LATIN9
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}, /* alias for ISO-8859-15 */
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{
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"mskanji", PG_SJIS
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}, /* alias for Shift_JIS */
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{
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"muleinternal", PG_MULE_INTERNAL
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},
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{
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"shiftjis", PG_SJIS
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}, /* Shift_JIS; JIS X 0202-1991 */
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{
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"shiftjis2004", PG_SHIFT_JIS_2004
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}, /* SHIFT-JIS-2004; Shift JIS for Japanese,
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* standard JIS X 0213 */
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{
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"sjis", PG_SJIS
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}, /* alias for Shift_JIS */
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{
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"sqlascii", PG_SQL_ASCII
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},
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{
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"tcvn", PG_WIN1258
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}, /* alias for WIN1258 */
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{
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"tcvn5712", PG_WIN1258
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}, /* alias for WIN1258 */
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{
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"uhc", PG_UHC
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}, /* UHC; Korean Windows CodePage 949 */
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{
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"unicode", PG_UTF8
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}, /* alias for UTF8 */
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{
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"utf8", PG_UTF8
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}, /* alias for UTF8 */
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{
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"vscii", PG_WIN1258
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}, /* alias for WIN1258 */
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{
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"win", PG_WIN1251
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}, /* _dirty_ alias for windows-1251 (backward
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* compatibility) */
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{
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"win1250", PG_WIN1250
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}, /* alias for Windows-1250 */
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{
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"win1251", PG_WIN1251
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}, /* alias for Windows-1251 */
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{
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"win1252", PG_WIN1252
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}, /* alias for Windows-1252 */
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{
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"win1253", PG_WIN1253
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}, /* alias for Windows-1253 */
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{
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"win1254", PG_WIN1254
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}, /* alias for Windows-1254 */
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{
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"win1255", PG_WIN1255
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}, /* alias for Windows-1255 */
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{
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"win1256", PG_WIN1256
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}, /* alias for Windows-1256 */
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{
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"win1257", PG_WIN1257
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}, /* alias for Windows-1257 */
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{
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"win1258", PG_WIN1258
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}, /* alias for Windows-1258 */
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{
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"win866", PG_WIN866
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}, /* IBM866 */
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{
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"win874", PG_WIN874
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}, /* alias for Windows-874 */
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{
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"win932", PG_SJIS
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}, /* alias for Shift_JIS */
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{
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"win936", PG_GBK
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}, /* alias for GBK */
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{
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"win949", PG_UHC
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}, /* alias for UHC */
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{
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"win950", PG_BIG5
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}, /* alias for BIG5 */
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{
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"windows1250", PG_WIN1250
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}, /* Windows-1251; Microsoft */
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{
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"windows1251", PG_WIN1251
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}, /* Windows-1251; Microsoft */
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{
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"windows1252", PG_WIN1252
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}, /* Windows-1252; Microsoft */
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{
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"windows1253", PG_WIN1253
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}, /* Windows-1253; Microsoft */
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{
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"windows1254", PG_WIN1254
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}, /* Windows-1254; Microsoft */
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{
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"windows1255", PG_WIN1255
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}, /* Windows-1255; Microsoft */
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{
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"windows1256", PG_WIN1256
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}, /* Windows-1256; Microsoft */
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{
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"windows1257", PG_WIN1257
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}, /* Windows-1257; Microsoft */
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{
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"windows1258", PG_WIN1258
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}, /* Windows-1258; Microsoft */
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{
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"windows866", PG_WIN866
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}, /* IBM866 */
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{
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"windows874", PG_WIN874
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}, /* Windows-874; Microsoft */
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{
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"windows932", PG_SJIS
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}, /* alias for Shift_JIS */
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{
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"windows936", PG_GBK
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}, /* alias for GBK */
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{
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"windows949", PG_UHC
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}, /* alias for UHC */
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{
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"windows950", PG_BIG5
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} /* alias for BIG5 */
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};
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/* ----------
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* These are "official" encoding names.
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* ----------
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*/
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#ifndef WIN32
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#define DEF_ENC2NAME(name, codepage) { #name, PG_##name }
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#else
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#define DEF_ENC2NAME(name, codepage) { #name, PG_##name, codepage }
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#endif
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const pg_enc2name pg_enc2name_tbl[] =
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{
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[PG_SQL_ASCII] = DEF_ENC2NAME(SQL_ASCII, 0),
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[PG_EUC_JP] = DEF_ENC2NAME(EUC_JP, 20932),
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[PG_EUC_CN] = DEF_ENC2NAME(EUC_CN, 20936),
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[PG_EUC_KR] = DEF_ENC2NAME(EUC_KR, 51949),
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[PG_EUC_TW] = DEF_ENC2NAME(EUC_TW, 0),
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[PG_EUC_JIS_2004] = DEF_ENC2NAME(EUC_JIS_2004, 20932),
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[PG_UTF8] = DEF_ENC2NAME(UTF8, 65001),
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[PG_MULE_INTERNAL] = DEF_ENC2NAME(MULE_INTERNAL, 0),
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[PG_LATIN1] = DEF_ENC2NAME(LATIN1, 28591),
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[PG_LATIN2] = DEF_ENC2NAME(LATIN2, 28592),
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[PG_LATIN3] = DEF_ENC2NAME(LATIN3, 28593),
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[PG_LATIN4] = DEF_ENC2NAME(LATIN4, 28594),
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[PG_LATIN5] = DEF_ENC2NAME(LATIN5, 28599),
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[PG_LATIN6] = DEF_ENC2NAME(LATIN6, 0),
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[PG_LATIN7] = DEF_ENC2NAME(LATIN7, 0),
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[PG_LATIN8] = DEF_ENC2NAME(LATIN8, 0),
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[PG_LATIN9] = DEF_ENC2NAME(LATIN9, 28605),
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[PG_LATIN10] = DEF_ENC2NAME(LATIN10, 0),
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[PG_WIN1256] = DEF_ENC2NAME(WIN1256, 1256),
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[PG_WIN1258] = DEF_ENC2NAME(WIN1258, 1258),
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[PG_WIN866] = DEF_ENC2NAME(WIN866, 866),
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[PG_WIN874] = DEF_ENC2NAME(WIN874, 874),
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[PG_KOI8R] = DEF_ENC2NAME(KOI8R, 20866),
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[PG_WIN1251] = DEF_ENC2NAME(WIN1251, 1251),
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[PG_WIN1252] = DEF_ENC2NAME(WIN1252, 1252),
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[PG_ISO_8859_5] = DEF_ENC2NAME(ISO_8859_5, 28595),
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[PG_ISO_8859_6] = DEF_ENC2NAME(ISO_8859_6, 28596),
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[PG_ISO_8859_7] = DEF_ENC2NAME(ISO_8859_7, 28597),
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[PG_ISO_8859_8] = DEF_ENC2NAME(ISO_8859_8, 28598),
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[PG_WIN1250] = DEF_ENC2NAME(WIN1250, 1250),
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[PG_WIN1253] = DEF_ENC2NAME(WIN1253, 1253),
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[PG_WIN1254] = DEF_ENC2NAME(WIN1254, 1254),
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[PG_WIN1255] = DEF_ENC2NAME(WIN1255, 1255),
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[PG_WIN1257] = DEF_ENC2NAME(WIN1257, 1257),
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[PG_KOI8U] = DEF_ENC2NAME(KOI8U, 21866),
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[PG_SJIS] = DEF_ENC2NAME(SJIS, 932),
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[PG_BIG5] = DEF_ENC2NAME(BIG5, 950),
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[PG_GBK] = DEF_ENC2NAME(GBK, 936),
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[PG_UHC] = DEF_ENC2NAME(UHC, 949),
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[PG_GB18030] = DEF_ENC2NAME(GB18030, 54936),
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[PG_JOHAB] = DEF_ENC2NAME(JOHAB, 0),
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[PG_SHIFT_JIS_2004] = DEF_ENC2NAME(SHIFT_JIS_2004, 932),
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};
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/* ----------
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* These are encoding names for gettext.
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*
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* This covers all encodings except MULE_INTERNAL, which is alien to gettext.
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* ----------
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*/
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const char *pg_enc2gettext_tbl[] =
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{
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[PG_SQL_ASCII] = "US-ASCII",
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[PG_UTF8] = "UTF-8",
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[PG_MULE_INTERNAL] = NULL,
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[PG_LATIN1] = "LATIN1",
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[PG_LATIN2] = "LATIN2",
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[PG_LATIN3] = "LATIN3",
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[PG_LATIN4] = "LATIN4",
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[PG_ISO_8859_5] = "ISO-8859-5",
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[PG_ISO_8859_6] = "ISO_8859-6",
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[PG_ISO_8859_7] = "ISO-8859-7",
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[PG_ISO_8859_8] = "ISO-8859-8",
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[PG_LATIN5] = "LATIN5",
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[PG_LATIN6] = "LATIN6",
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[PG_LATIN7] = "LATIN7",
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[PG_LATIN8] = "LATIN8",
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[PG_LATIN9] = "LATIN-9",
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[PG_LATIN10] = "LATIN10",
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[PG_KOI8R] = "KOI8-R",
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[PG_KOI8U] = "KOI8-U",
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[PG_WIN1250] = "CP1250",
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[PG_WIN1251] = "CP1251",
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[PG_WIN1252] = "CP1252",
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[PG_WIN1253] = "CP1253",
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[PG_WIN1254] = "CP1254",
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[PG_WIN1255] = "CP1255",
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[PG_WIN1256] = "CP1256",
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[PG_WIN1257] = "CP1257",
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[PG_WIN1258] = "CP1258",
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[PG_WIN866] = "CP866",
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[PG_WIN874] = "CP874",
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[PG_EUC_CN] = "EUC-CN",
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[PG_EUC_JP] = "EUC-JP",
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[PG_EUC_KR] = "EUC-KR",
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[PG_EUC_TW] = "EUC-TW",
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[PG_EUC_JIS_2004] = "EUC-JP",
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[PG_SJIS] = "SHIFT-JIS",
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[PG_BIG5] = "BIG5",
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[PG_GBK] = "GBK",
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[PG_UHC] = "UHC",
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[PG_GB18030] = "GB18030",
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[PG_JOHAB] = "JOHAB",
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[PG_SHIFT_JIS_2004] = "SHIFT_JISX0213",
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};
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/*
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* Table of encoding names for ICU (currently covers backend encodings only)
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*
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* Reference: <https://ssl.icu-project.org/icu-bin/convexp>
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*
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* NULL entries are not supported by ICU, or their mapping is unclear.
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*/
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static const char *const pg_enc2icu_tbl[] =
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{
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[PG_SQL_ASCII] = NULL,
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[PG_EUC_JP] = "EUC-JP",
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[PG_EUC_CN] = "EUC-CN",
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[PG_EUC_KR] = "EUC-KR",
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[PG_EUC_TW] = "EUC-TW",
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[PG_EUC_JIS_2004] = NULL,
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[PG_UTF8] = "UTF-8",
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[PG_MULE_INTERNAL] = NULL,
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[PG_LATIN1] = "ISO-8859-1",
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[PG_LATIN2] = "ISO-8859-2",
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[PG_LATIN3] = "ISO-8859-3",
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[PG_LATIN4] = "ISO-8859-4",
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[PG_LATIN5] = "ISO-8859-9",
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[PG_LATIN6] = "ISO-8859-10",
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[PG_LATIN7] = "ISO-8859-13",
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[PG_LATIN8] = "ISO-8859-14",
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[PG_LATIN9] = "ISO-8859-15",
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[PG_LATIN10] = NULL,
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[PG_WIN1256] = "CP1256",
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[PG_WIN1258] = "CP1258",
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[PG_WIN866] = "CP866",
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[PG_WIN874] = NULL,
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[PG_KOI8R] = "KOI8-R",
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[PG_WIN1251] = "CP1251",
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[PG_WIN1252] = "CP1252",
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[PG_ISO_8859_5] = "ISO-8859-5",
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[PG_ISO_8859_6] = "ISO-8859-6",
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[PG_ISO_8859_7] = "ISO-8859-7",
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[PG_ISO_8859_8] = "ISO-8859-8",
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[PG_WIN1250] = "CP1250",
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[PG_WIN1253] = "CP1253",
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[PG_WIN1254] = "CP1254",
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[PG_WIN1255] = "CP1255",
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[PG_WIN1257] = "CP1257",
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[PG_KOI8U] = "KOI8-U",
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};
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StaticAssertDecl(lengthof(pg_enc2icu_tbl) == PG_ENCODING_BE_LAST + 1,
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"pg_enc2icu_tbl incomplete");
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/*
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* Is this encoding supported by ICU?
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*/
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bool
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is_encoding_supported_by_icu(int encoding)
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{
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if (!PG_VALID_BE_ENCODING(encoding))
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return false;
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return (pg_enc2icu_tbl[encoding] != NULL);
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}
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/*
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* Returns ICU's name for encoding, or NULL if not supported
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*/
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const char *
|
|
get_encoding_name_for_icu(int encoding)
|
|
{
|
|
if (!PG_VALID_BE_ENCODING(encoding))
|
|
return NULL;
|
|
return pg_enc2icu_tbl[encoding];
|
|
}
|
|
|
|
|
|
/* ----------
|
|
* Encoding checks, for error returns -1 else encoding id
|
|
* ----------
|
|
*/
|
|
int
|
|
pg_valid_client_encoding(const char *name)
|
|
{
|
|
int enc;
|
|
|
|
if ((enc = pg_char_to_encoding(name)) < 0)
|
|
return -1;
|
|
|
|
if (!PG_VALID_FE_ENCODING(enc))
|
|
return -1;
|
|
|
|
return enc;
|
|
}
|
|
|
|
int
|
|
pg_valid_server_encoding(const char *name)
|
|
{
|
|
int enc;
|
|
|
|
if ((enc = pg_char_to_encoding(name)) < 0)
|
|
return -1;
|
|
|
|
if (!PG_VALID_BE_ENCODING(enc))
|
|
return -1;
|
|
|
|
return enc;
|
|
}
|
|
|
|
int
|
|
pg_valid_server_encoding_id(int encoding)
|
|
{
|
|
return PG_VALID_BE_ENCODING(encoding);
|
|
}
|
|
|
|
/*
|
|
* Remove irrelevant chars from encoding name, store at *newkey
|
|
*
|
|
* (Caller's responsibility to provide a large enough buffer)
|
|
*/
|
|
static char *
|
|
clean_encoding_name(const char *key, char *newkey)
|
|
{
|
|
const char *p;
|
|
char *np;
|
|
|
|
for (p = key, np = newkey; *p != '\0'; p++)
|
|
{
|
|
if (isalnum((unsigned char) *p))
|
|
{
|
|
if (*p >= 'A' && *p <= 'Z')
|
|
*np++ = *p + 'a' - 'A';
|
|
else
|
|
*np++ = *p;
|
|
}
|
|
}
|
|
*np = '\0';
|
|
return newkey;
|
|
}
|
|
|
|
/*
|
|
* Search encoding by encoding name
|
|
*
|
|
* Returns encoding ID, or -1 if not recognized
|
|
*/
|
|
int
|
|
pg_char_to_encoding(const char *name)
|
|
{
|
|
unsigned int nel = lengthof(pg_encname_tbl);
|
|
const pg_encname *base = pg_encname_tbl,
|
|
*last = base + nel - 1,
|
|
*position;
|
|
int result;
|
|
char buff[NAMEDATALEN],
|
|
*key;
|
|
|
|
if (name == NULL || *name == '\0')
|
|
return -1;
|
|
|
|
if (strlen(name) >= NAMEDATALEN)
|
|
return -1; /* it's certainly not in the table */
|
|
|
|
key = clean_encoding_name(name, buff);
|
|
|
|
while (last >= base)
|
|
{
|
|
position = base + ((last - base) >> 1);
|
|
result = key[0] - position->name[0];
|
|
|
|
if (result == 0)
|
|
{
|
|
result = strcmp(key, position->name);
|
|
if (result == 0)
|
|
return position->encoding;
|
|
}
|
|
if (result < 0)
|
|
last = position - 1;
|
|
else
|
|
base = position + 1;
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
const char *
|
|
pg_encoding_to_char(int encoding)
|
|
{
|
|
if (PG_VALID_ENCODING(encoding))
|
|
{
|
|
const pg_enc2name *p = &pg_enc2name_tbl[encoding];
|
|
|
|
Assert(encoding == p->encoding);
|
|
return p->name;
|
|
}
|
|
return "";
|
|
}
|