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/*
* Encoding names and routines for work with it. All
* in this file is shared bedween FE and BE.
*
* $Id: encnames.c,v 1.3 2001/10/11 14:20:35 ishii Exp $
*/
#ifdef FRONTEND
#include "postgres_fe.h"
#define Assert(condition)
#else
#include "postgres.h"
#include "miscadmin.h"
#include "utils/builtins.h"
#endif
#ifdef WIN32
#include "win32.h"
#else
#include <unistd.h>
#endif
#include "mb/pg_wchar.h"
#include <ctype.h>
/* ----------
* All encoding names, sorted: *** A L P H A B E T I C ***
*
* All names must be without irrelevan chars, search routines use
* isalnum() chars only. It means ISO-8859-1, iso_8859-1 and Iso8859_1
* are always converted to 'iso88591'. All must be lower case.
*
* The table doesn't contain 'cs' aliases (like csISOLatin1). It's needful?
*
* Karel Zak, Aug 2001
* ----------
*/
pg_encname pg_encname_tbl[] =
{
{ "alt", PG_ALT }, /* IBM866 */
{ "big5", PG_BIG5 }, /* Big5; Chinese for Taiwan Multi-byte set */
{ "euccn", PG_EUC_CN }, /* EUC-CN; ??? */
{ "eucjp", PG_EUC_JP }, /* EUC-JP; Extended UNIX Code Fixed Width for Japanese, stdandard OSF */
{ "euckr", PG_EUC_KR }, /* EUC-KR; RFC1557,Choi */
{ "euctw", PG_EUC_TW }, /* EUC-TW; ??? */
{ "iso88591", PG_LATIN1 }, /* ISO-8859-1; RFC1345,KXS2 */
{ "iso885910", PG_ISO_8859_10 }, /* ISO-8859-10; RFC1345,KXS2 */
{ "iso885913", PG_ISO_8859_13 }, /* ISO-8859-13; RFC1345,KXS2 */
{ "iso885914", PG_ISO_8859_14 }, /* ISO-8859-14; RFC1345,KXS2 */
{ "iso885915", PG_ISO_8859_15 }, /* ISO-8859-15; RFC1345,KXS2 */
{ "iso885916", PG_ISO_8859_16 }, /* ISO-8859-15; RFC1345,KXS2 */
{ "iso88592", PG_LATIN2 }, /* ISO-8859-2; RFC1345,KXS2 */
{ "iso88593", PG_LATIN3 }, /* ISO-8859-3; RFC1345,KXS2 */
{ "iso88594", PG_LATIN4 }, /* ISO-8859-4; RFC1345,KXS2 */
{ "iso88595", PG_ISO_8859_5 }, /* ISO-8859-5; RFC1345,KXS2 */
{ "iso88596", PG_ISO_8859_6 }, /* ISO-8859-6; RFC1345,KXS2 */
{ "iso88597", PG_ISO_8859_7 }, /* ISO-8859-7; RFC1345,KXS2 */
{ "iso88598", PG_ISO_8859_8 }, /* ISO-8859-8; RFC1345,KXS2 */
{ "iso88599", PG_LATIN5 }, /* ISO-8859-9; RFC1345,KXS2 */
{ "koi8", PG_KOI8R }, /* _dirty_ alias for KOI8-R (backward compatibility) */
{ "koi8r", PG_KOI8R }, /* KOI8-R; RFC1489 */
{ "latin1", PG_LATIN1 }, /* alias for ISO-8859-1 */
{ "latin2", PG_LATIN2 }, /* alias for ISO-8859-2 */
{ "latin3", PG_LATIN3 }, /* alias for ISO-8859-3 */
{ "latin4", PG_LATIN4 }, /* alias for ISO-8859-4 */
{ "latin5", PG_LATIN5 }, /* alias for ISO-8859-9 */
{ "latin6", PG_ISO_8859_10}, /* alias for ISO-8859-10 */
{ "latin7", PG_ISO_8859_13}, /* alias for ISO-8859-13 */
{ "latin8", PG_ISO_8859_14}, /* alias for ISO-8859-14 */
{ "latin9", PG_ISO_8859_15}, /* alias for ISO-8859-15 */
{ "mskanji", PG_SJIS }, /* alias for Shift_JIS */
{ "muleinternal",PG_MULE_INTERNAL },
{ "shiftjis", PG_SJIS }, /* Shift_JIS; JIS X 0202-1991 */
{ "sjis", PG_SJIS }, /* alias for Shift_JIS */
{ "sqlascii", PG_SQL_ASCII },
{ "unicode", PG_UTF8 }, /* alias for UTF-8 */
{ "utf8", PG_UTF8 }, /* UTF-8; RFC2279 */
{ "win", PG_WIN1251 }, /* _dirty_ alias for windows-1251 (backward compatibility) */
{ "win1250", PG_WIN1250 }, /* alias for Windows-1250 */
{ "win1251", PG_WIN1251 }, /* alias for Windows-1251 */
{ "windows1250",PG_WIN1250 }, /* Windows-1251; Microsoft */
{ "windows1251",PG_WIN1251 }, /* Windows-1251; Microsoft */
{ NULL, 0 } /* last */
};
unsigned int pg_encname_tbl_sz = \
sizeof(pg_encname_tbl) / sizeof(pg_encname_tbl[0]) -1;
/* ----------
* WARNING: sorted by pg_enc enum (pg_wchar.h)!
* ----------
*/
pg_enc2name pg_enc2name_tbl[] =
{
{ "SQL_ASCII", PG_SQL_ASCII },
{ "EUC_JP", PG_EUC_JP },
{ "EUC_CN", PG_EUC_CN },
{ "EUC_KR", PG_EUC_KR },
{ "EUC_TW", PG_EUC_TW },
{ "UNICODE", PG_UTF8 },
{ "MULE_INTERNAL",PG_MULE_INTERNAL },
{ "LATIN1", PG_LATIN1 },
{ "LATIN2", PG_LATIN2 },
{ "LATIN3", PG_LATIN3 },
{ "LATIN4", PG_LATIN4 },
{ "LATIN5", PG_LATIN5 },
{ "KOI8", PG_KOI8R },
{ "WIN", PG_WIN1251 },
{ "ALT", PG_ALT },
{ "ISO_8859_5", PG_ISO_8859_5 },
{ "ISO_8859_6", PG_ISO_8859_6 },
{ "ISO_8859_7", PG_ISO_8859_7 },
{ "ISO_8859_8", PG_ISO_8859_8 },
{ "ISO_8859_10", PG_ISO_8859_10 },
{ "ISO_8859_13", PG_ISO_8859_13 },
{ "ISO_8859_14", PG_ISO_8859_14 },
{ "ISO_8859_15", PG_ISO_8859_15 },
{ "ISO_8859_16", PG_ISO_8859_16 },
{ "SJIS", PG_SJIS },
{ "BIG5", PG_BIG5 },
{ "WIN1250", PG_WIN1250 }
};
/* ----------
* 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;
}
/* ----------
* Remove irrelevant chars from encoding name
* ----------
*/
static char *
clean_encoding_name(char *key, char *newkey)
{
char *p, *np;
for(p=key, np=newkey; *p!='\0'; p++)
{
if (isalnum((unsigned char) *p))
*np++=tolower((unsigned char) *p);
}
*np = '\0';
return newkey;
}
/* ----------
* Search encoding by encoding name
* ----------
*/
pg_encname *
pg_char_to_encname_struct(const char *name)
{
unsigned int nel = pg_encname_tbl_sz;
pg_encname *base = pg_encname_tbl,
*last = base + nel - 1,
*position;
int result;
char buff[NAMEDATALEN],
*key;
if(name==NULL || *name=='\0')
return NULL;
if (strlen(name) > NAMEDATALEN)
{
#ifdef FRONTEND
fprintf(stderr, "pg_char_to_encname_struct(): encoding name too long");
return NULL;
#else
elog(ERROR, "pg_char_to_encname_struct(): encoding name too long");
#endif
}
key = clean_encoding_name((char *) 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;
}
if (result < 0)
last = position - 1;
else
base = position + 1;
}
return NULL;
}
/*
* Returns encoding or -1 for error
*/
int
pg_char_to_encoding(const char *s)
{
pg_encname *p = NULL;
if (!s)
return (-1);
p = pg_char_to_encname_struct(s);
return p ? p->encoding : -1;
}
#ifndef FRONTEND
Datum
PG_char_to_encoding(PG_FUNCTION_ARGS)
{
Name s = PG_GETARG_NAME(0);
PG_RETURN_INT32(pg_char_to_encoding(NameStr(*s)));
}
#endif
const char *
pg_encoding_to_char(int encoding)
{
if (PG_VALID_ENCODING(encoding))
{
pg_enc2name *p = &pg_enc2name_tbl[ encoding ];
Assert( encoding == p->encoding );
return p->name;
}
return "";
}
#ifndef FRONTEND
Datum
PG_encoding_to_char(PG_FUNCTION_ARGS)
{
int32 encoding = PG_GETARG_INT32(0);
const char *encoding_name = pg_encoding_to_char(encoding);
return DirectFunctionCall1(namein, CStringGetDatum(encoding_name));
}
#endif
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