greenplumn encnames 源码
greenplumn encnames 代码
文件路径：/src/backend/utils/mb/encnames.c
/*
* Encoding names and routines for work with it. All
* in this file is shared between FE and BE.
*
* src/backend/utils/mb/encnames.c
*/
#ifdef FRONTEND
#include "postgres_fe.h"
#else
#include "postgres.h"
#include "utils/builtins.h"
#endif
#include <ctype.h>
#include <unistd.h>
#include "mb/pg_wchar.h"
/* ----------
* All encoding names, sorted: *** A L P H A B E T I C ***
*
* All names must be without irrelevant 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 needed?
*
* Karel Zak, Aug 2001
* ----------
*/
typedef struct pg_encname
{
const char *name;
pg_enc encoding;
} pg_encname;
static const pg_encname pg_encname_tbl[] =
{
{
"abc", PG_WIN1258
}, /* alias for WIN1258 */
{
"alt", PG_WIN866
}, /* IBM866 */
{
"big5", PG_BIG5
}, /* Big5; Chinese for Taiwan multibyte set */
{
"euccn", PG_EUC_CN
}, /* EUC-CN; Extended Unix Code for simplified
* Chinese */
{
"eucjis2004", PG_EUC_JIS_2004
}, /* EUC-JIS-2004; Extended UNIX Code fixed
* Width for Japanese, standard JIS X 0213 */
{
"eucjp", PG_EUC_JP
}, /* EUC-JP; Extended UNIX Code fixed Width for
* Japanese, standard OSF */
{
"euckr", PG_EUC_KR
}, /* EUC-KR; Extended Unix Code for Korean , KS
* X 1001 standard */
{
"euctw", PG_EUC_TW
}, /* EUC-TW; Extended Unix Code for
*
* traditional Chinese */
{
"gb18030", PG_GB18030
}, /* GB18030;GB18030 */
{
"gbk", PG_GBK
}, /* GBK; Chinese Windows CodePage 936
* simplified Chinese */
{
"iso88591", PG_LATIN1
}, /* ISO-8859-1; RFC1345,KXS2 */
{
"iso885910", PG_LATIN6
}, /* ISO-8859-10; RFC1345,KXS2 */
{
"iso885913", PG_LATIN7
}, /* ISO-8859-13; RFC1345,KXS2 */
{
"iso885914", PG_LATIN8
}, /* ISO-8859-14; RFC1345,KXS2 */
{
"iso885915", PG_LATIN9
}, /* ISO-8859-15; RFC1345,KXS2 */
{
"iso885916", PG_LATIN10
}, /* ISO-8859-16; 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 */
{
"johab", PG_JOHAB
}, /* JOHAB; Extended Unix Code for simplified
* Chinese */
{
"koi8", PG_KOI8R
}, /* _dirty_ alias for KOI8-R (backward
* compatibility) */
{
"koi8r", PG_KOI8R
}, /* KOI8-R; RFC1489 */
{
"koi8u", PG_KOI8U
}, /* KOI8-U; RFC2319 */
{
"latin1", PG_LATIN1
}, /* alias for ISO-8859-1 */
{
"latin10", PG_LATIN10
}, /* alias for ISO-8859-16 */
{
"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_LATIN6
}, /* alias for ISO-8859-10 */
{
"latin7", PG_LATIN7
}, /* alias for ISO-8859-13 */
{
"latin8", PG_LATIN8
}, /* alias for ISO-8859-14 */
{
"latin9", PG_LATIN9
}, /* 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 */
{
"shiftjis2004", PG_SHIFT_JIS_2004
}, /* SHIFT-JIS-2004; Shift JIS for Japanese,
* standard JIS X 0213 */
{
"sjis", PG_SJIS
}, /* alias for Shift_JIS */
{
"sqlascii", PG_SQL_ASCII
},
{
"tcvn", PG_WIN1258
}, /* alias for WIN1258 */
{
"tcvn5712", PG_WIN1258
}, /* alias for WIN1258 */
{
"uhc", PG_UHC
}, /* UHC; Korean Windows CodePage 949 */
{
"unicode", PG_UTF8
}, /* alias for UTF8 */
{
"utf8", PG_UTF8
}, /* alias for UTF8 */
{
"vscii", PG_WIN1258
}, /* alias for WIN1258 */
{
"win", PG_WIN1251
}, /* _dirty_ alias for windows-1251 (backward
* compatibility) */
{
"win1250", PG_WIN1250
}, /* alias for Windows-1250 */
{
"win1251", PG_WIN1251
}, /* alias for Windows-1251 */
{
"win1252", PG_WIN1252
}, /* alias for Windows-1252 */
{
"win1253", PG_WIN1253
}, /* alias for Windows-1253 */
{
"win1254", PG_WIN1254
}, /* alias for Windows-1254 */
{
"win1255", PG_WIN1255
}, /* alias for Windows-1255 */
{
"win1256", PG_WIN1256
}, /* alias for Windows-1256 */
{
"win1257", PG_WIN1257
}, /* alias for Windows-1257 */
{
"win1258", PG_WIN1258
}, /* alias for Windows-1258 */
{
"win866", PG_WIN866
}, /* IBM866 */
{
"win874", PG_WIN874
}, /* alias for Windows-874 */
{
"win932", PG_SJIS
}, /* alias for Shift_JIS */
{
"win936", PG_GBK
}, /* alias for GBK */
{
"win949", PG_UHC
}, /* alias for UHC */
{
"win950", PG_BIG5
}, /* alias for BIG5 */
{
"windows1250", PG_WIN1250
}, /* Windows-1251; Microsoft */
{
"windows1251", PG_WIN1251
}, /* Windows-1251; Microsoft */
{
"windows1252", PG_WIN1252
}, /* Windows-1252; Microsoft */
{
"windows1253", PG_WIN1253
}, /* Windows-1253; Microsoft */
{
"windows1254", PG_WIN1254
}, /* Windows-1254; Microsoft */
{
"windows1255", PG_WIN1255
}, /* Windows-1255; Microsoft */
{
"windows1256", PG_WIN1256
}, /* Windows-1256; Microsoft */
{
"windows1257", PG_WIN1257
}, /* Windows-1257; Microsoft */
{
"windows1258", PG_WIN1258
}, /* Windows-1258; Microsoft */
{
"windows866", PG_WIN866
}, /* IBM866 */
{
"windows874", PG_WIN874
}, /* Windows-874; Microsoft */
{
"windows932", PG_SJIS
}, /* alias for Shift_JIS */
{
"windows936", PG_GBK
}, /* alias for GBK */
{
"windows949", PG_UHC
}, /* alias for UHC */
{
"windows950", PG_BIG5
} /* alias for BIG5 */
};
/* ----------
* These are "official" encoding names.
* XXX must be sorted by the same order as enum pg_enc (in mb/pg_wchar.h)
* ----------
*/
#ifndef WIN32
#define DEF_ENC2NAME(name, codepage) { #name, PG_##name }
#else
#define DEF_ENC2NAME(name, codepage) { #name, PG_##name, codepage }
#endif
const pg_enc2name pg_enc2name_tbl[] =
{
DEF_ENC2NAME(SQL_ASCII, 0),
DEF_ENC2NAME(EUC_JP, 20932),
DEF_ENC2NAME(EUC_CN, 20936),
DEF_ENC2NAME(EUC_KR, 51949),
DEF_ENC2NAME(EUC_TW, 0),
DEF_ENC2NAME(EUC_JIS_2004, 20932),
DEF_ENC2NAME(UTF8, 65001),
DEF_ENC2NAME(MULE_INTERNAL, 0),
DEF_ENC2NAME(LATIN1, 28591),
DEF_ENC2NAME(LATIN2, 28592),
DEF_ENC2NAME(LATIN3, 28593),
DEF_ENC2NAME(LATIN4, 28594),
DEF_ENC2NAME(LATIN5, 28599),
DEF_ENC2NAME(LATIN6, 0),
DEF_ENC2NAME(LATIN7, 0),
DEF_ENC2NAME(LATIN8, 0),
DEF_ENC2NAME(LATIN9, 28605),
DEF_ENC2NAME(LATIN10, 0),
DEF_ENC2NAME(WIN1256, 1256),
DEF_ENC2NAME(WIN1258, 1258),
DEF_ENC2NAME(WIN866, 866),
DEF_ENC2NAME(WIN874, 874),
DEF_ENC2NAME(KOI8R, 20866),
DEF_ENC2NAME(WIN1251, 1251),
DEF_ENC2NAME(WIN1252, 1252),
DEF_ENC2NAME(ISO_8859_5, 28595),
DEF_ENC2NAME(ISO_8859_6, 28596),
DEF_ENC2NAME(ISO_8859_7, 28597),
DEF_ENC2NAME(ISO_8859_8, 28598),
DEF_ENC2NAME(WIN1250, 1250),
DEF_ENC2NAME(WIN1253, 1253),
DEF_ENC2NAME(WIN1254, 1254),
DEF_ENC2NAME(WIN1255, 1255),
DEF_ENC2NAME(WIN1257, 1257),
DEF_ENC2NAME(KOI8U, 21866),
DEF_ENC2NAME(SJIS, 932),
DEF_ENC2NAME(BIG5, 950),
DEF_ENC2NAME(GBK, 936),
DEF_ENC2NAME(UHC, 949),
DEF_ENC2NAME(GB18030, 54936),
DEF_ENC2NAME(JOHAB, 0),
DEF_ENC2NAME(SHIFT_JIS_2004, 932)
};
/* ----------
* These are encoding names for gettext.
*
* This covers all encodings except MULE_INTERNAL, which is alien to gettext.
* ----------
*/
const pg_enc2gettext pg_enc2gettext_tbl[] =
{
{PG_SQL_ASCII, "US-ASCII"},
{PG_UTF8, "UTF-8"},
{PG_LATIN1, "LATIN1"},
{PG_LATIN2, "LATIN2"},
{PG_LATIN3, "LATIN3"},
{PG_LATIN4, "LATIN4"},
{PG_ISO_8859_5, "ISO-8859-5"},
{PG_ISO_8859_6, "ISO_8859-6"},
{PG_ISO_8859_7, "ISO-8859-7"},
{PG_ISO_8859_8, "ISO-8859-8"},
{PG_LATIN5, "LATIN5"},
{PG_LATIN6, "LATIN6"},
{PG_LATIN7, "LATIN7"},
{PG_LATIN8, "LATIN8"},
{PG_LATIN9, "LATIN-9"},
{PG_LATIN10, "LATIN10"},
{PG_KOI8R, "KOI8-R"},
{PG_KOI8U, "KOI8-U"},
{PG_WIN1250, "CP1250"},
{PG_WIN1251, "CP1251"},
{PG_WIN1252, "CP1252"},
{PG_WIN1253, "CP1253"},
{PG_WIN1254, "CP1254"},
{PG_WIN1255, "CP1255"},
{PG_WIN1256, "CP1256"},
{PG_WIN1257, "CP1257"},
{PG_WIN1258, "CP1258"},
{PG_WIN866, "CP866"},
{PG_WIN874, "CP874"},
{PG_EUC_CN, "EUC-CN"},
{PG_EUC_JP, "EUC-JP"},
{PG_EUC_KR, "EUC-KR"},
{PG_EUC_TW, "EUC-TW"},
{PG_EUC_JIS_2004, "EUC-JP"},
{PG_SJIS, "SHIFT-JIS"},
{PG_BIG5, "BIG5"},
{PG_GBK, "GBK"},
{PG_UHC, "UHC"},
{PG_GB18030, "GB18030"},
{PG_JOHAB, "JOHAB"},
{PG_SHIFT_JIS_2004, "SHIFT_JISX0213"},
{0, NULL}
};
#ifndef FRONTEND
/*
* Table of encoding names for ICU
*
* Reference: <https://ssl.icu-project.org/icu-bin/convexp>
*
* NULL entries are not supported by ICU, or their mapping is unclear.
*/
static const char *const pg_enc2icu_tbl[] =
{
NULL, /* PG_SQL_ASCII */
"EUC-JP", /* PG_EUC_JP */
"EUC-CN", /* PG_EUC_CN */
"EUC-KR", /* PG_EUC_KR */
"EUC-TW", /* PG_EUC_TW */
NULL, /* PG_EUC_JIS_2004 */
"UTF-8", /* PG_UTF8 */
NULL, /* PG_MULE_INTERNAL */
"ISO-8859-1", /* PG_LATIN1 */
"ISO-8859-2", /* PG_LATIN2 */
"ISO-8859-3", /* PG_LATIN3 */
"ISO-8859-4", /* PG_LATIN4 */
"ISO-8859-9", /* PG_LATIN5 */
"ISO-8859-10", /* PG_LATIN6 */
"ISO-8859-13", /* PG_LATIN7 */
"ISO-8859-14", /* PG_LATIN8 */
"ISO-8859-15", /* PG_LATIN9 */
NULL, /* PG_LATIN10 */
"CP1256", /* PG_WIN1256 */
"CP1258", /* PG_WIN1258 */
"CP866", /* PG_WIN866 */
NULL, /* PG_WIN874 */
"KOI8-R", /* PG_KOI8R */
"CP1251", /* PG_WIN1251 */
"CP1252", /* PG_WIN1252 */
"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 */
"CP1250", /* PG_WIN1250 */
"CP1253", /* PG_WIN1253 */
"CP1254", /* PG_WIN1254 */
"CP1255", /* PG_WIN1255 */
"CP1257", /* PG_WIN1257 */
"KOI8-U", /* PG_KOI8U */
};
bool
is_encoding_supported_by_icu(int encoding)
{
return (pg_enc2icu_tbl[encoding] != NULL);
}
const char *
get_encoding_name_for_icu(int encoding)
{
const char *icu_encoding_name;
StaticAssertStmt(lengthof(pg_enc2icu_tbl) == PG_ENCODING_BE_LAST + 1,
"pg_enc2icu_tbl incomplete");
icu_encoding_name = pg_enc2icu_tbl[encoding];
if (!icu_encoding_name)
ereport(ERROR,
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
errmsg("encoding \"%s\" not supported by ICU",
pg_encoding_to_char(encoding))));
return icu_encoding_name;
}
#endif /* not FRONTEND */
/* ----------
* 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
* ----------
*/
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 for error
* ----------
*/
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)
{
#ifdef FRONTEND
fprintf(stderr, "encoding name too long\n");
return -1;
#else
ereport(ERROR,
(errcode(ERRCODE_NAME_TOO_LONG),
errmsg("encoding name too long")));
#endif
}
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;
}
#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))
{
const 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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