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-rw-r--r--libpq/chklocale.c445
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diff --git a/libpq/chklocale.c b/libpq/chklocale.c
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--- a/libpq/chklocale.c
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-/*-------------------------------------------------------------------------
- *
- * chklocale.c
- * Functions for handling locale-related info
- *
- *
- * Copyright (c) 1996-2016, PostgreSQL Global Development Group
- *
- *
- * IDENTIFICATION
- * src/port/chklocale.c
- *
- *-------------------------------------------------------------------------
- */
-
-#ifndef FRONTEND
-#include "postgres.h"
-#else
-#include "postgres_fe.h"
-#endif
-
-#if defined(WIN32) && (_MSC_VER >= 1900)
-#include <windows.h>
-#endif
-
-#include <locale.h>
-#ifdef HAVE_LANGINFO_H
-#include <langinfo.h>
-#endif
-
-#include "mb/pg_wchar.h"
-
-
-/*
- * This table needs to recognize all the CODESET spellings for supported
- * backend encodings, as well as frontend-only encodings where possible
- * (the latter case is currently only needed for initdb to recognize
- * error situations). On Windows, we rely on entries for codepage
- * numbers (CPnnn).
- *
- * Note that we search the table with pg_strcasecmp(), so variant
- * capitalizations don't need their own entries.
- */
-struct encoding_match
-{
- enum pg_enc pg_enc_code;
- const char *system_enc_name;
-};
-
-static const struct encoding_match encoding_match_list[] = {
- {PG_EUC_JP, "EUC-JP"},
- {PG_EUC_JP, "eucJP"},
- {PG_EUC_JP, "IBM-eucJP"},
- {PG_EUC_JP, "sdeckanji"},
- {PG_EUC_JP, "CP20932"},
-
- {PG_EUC_CN, "EUC-CN"},
- {PG_EUC_CN, "eucCN"},
- {PG_EUC_CN, "IBM-eucCN"},
- {PG_EUC_CN, "GB2312"},
- {PG_EUC_CN, "dechanzi"},
- {PG_EUC_CN, "CP20936"},
-
- {PG_EUC_KR, "EUC-KR"},
- {PG_EUC_KR, "eucKR"},
- {PG_EUC_KR, "IBM-eucKR"},
- {PG_EUC_KR, "deckorean"},
- {PG_EUC_KR, "5601"},
- {PG_EUC_KR, "CP51949"},
-
- {PG_EUC_TW, "EUC-TW"},
- {PG_EUC_TW, "eucTW"},
- {PG_EUC_TW, "IBM-eucTW"},
- {PG_EUC_TW, "cns11643"},
- /* No codepage for EUC-TW ? */
-
- {PG_UTF8, "UTF-8"},
- {PG_UTF8, "utf8"},
- {PG_UTF8, "CP65001"},
-
- {PG_LATIN1, "ISO-8859-1"},
- {PG_LATIN1, "ISO8859-1"},
- {PG_LATIN1, "iso88591"},
- {PG_LATIN1, "CP28591"},
-
- {PG_LATIN2, "ISO-8859-2"},
- {PG_LATIN2, "ISO8859-2"},
- {PG_LATIN2, "iso88592"},
- {PG_LATIN2, "CP28592"},
-
- {PG_LATIN3, "ISO-8859-3"},
- {PG_LATIN3, "ISO8859-3"},
- {PG_LATIN3, "iso88593"},
- {PG_LATIN3, "CP28593"},
-
- {PG_LATIN4, "ISO-8859-4"},
- {PG_LATIN4, "ISO8859-4"},
- {PG_LATIN4, "iso88594"},
- {PG_LATIN4, "CP28594"},
-
- {PG_LATIN5, "ISO-8859-9"},
- {PG_LATIN5, "ISO8859-9"},
- {PG_LATIN5, "iso88599"},
- {PG_LATIN5, "CP28599"},
-
- {PG_LATIN6, "ISO-8859-10"},
- {PG_LATIN6, "ISO8859-10"},
- {PG_LATIN6, "iso885910"},
-
- {PG_LATIN7, "ISO-8859-13"},
- {PG_LATIN7, "ISO8859-13"},
- {PG_LATIN7, "iso885913"},
-
- {PG_LATIN8, "ISO-8859-14"},
- {PG_LATIN8, "ISO8859-14"},
- {PG_LATIN8, "iso885914"},
-
- {PG_LATIN9, "ISO-8859-15"},
- {PG_LATIN9, "ISO8859-15"},
- {PG_LATIN9, "iso885915"},
- {PG_LATIN9, "CP28605"},
-
- {PG_LATIN10, "ISO-8859-16"},
- {PG_LATIN10, "ISO8859-16"},
- {PG_LATIN10, "iso885916"},
-
- {PG_KOI8R, "KOI8-R"},
- {PG_KOI8R, "CP20866"},
-
- {PG_KOI8U, "KOI8-U"},
- {PG_KOI8U, "CP21866"},
-
- {PG_WIN866, "CP866"},
- {PG_WIN874, "CP874"},
- {PG_WIN1250, "CP1250"},
- {PG_WIN1251, "CP1251"},
- {PG_WIN1251, "ansi-1251"},
- {PG_WIN1252, "CP1252"},
- {PG_WIN1253, "CP1253"},
- {PG_WIN1254, "CP1254"},
- {PG_WIN1255, "CP1255"},
- {PG_WIN1256, "CP1256"},
- {PG_WIN1257, "CP1257"},
- {PG_WIN1258, "CP1258"},
-
- {PG_ISO_8859_5, "ISO-8859-5"},
- {PG_ISO_8859_5, "ISO8859-5"},
- {PG_ISO_8859_5, "iso88595"},
- {PG_ISO_8859_5, "CP28595"},
-
- {PG_ISO_8859_6, "ISO-8859-6"},
- {PG_ISO_8859_6, "ISO8859-6"},
- {PG_ISO_8859_6, "iso88596"},
- {PG_ISO_8859_6, "CP28596"},
-
- {PG_ISO_8859_7, "ISO-8859-7"},
- {PG_ISO_8859_7, "ISO8859-7"},
- {PG_ISO_8859_7, "iso88597"},
- {PG_ISO_8859_7, "CP28597"},
-
- {PG_ISO_8859_8, "ISO-8859-8"},
- {PG_ISO_8859_8, "ISO8859-8"},
- {PG_ISO_8859_8, "iso88598"},
- {PG_ISO_8859_8, "CP28598"},
-
- {PG_SJIS, "SJIS"},
- {PG_SJIS, "PCK"},
- {PG_SJIS, "CP932"},
- {PG_SJIS, "SHIFT_JIS"},
-
- {PG_BIG5, "BIG5"},
- {PG_BIG5, "BIG5HKSCS"},
- {PG_BIG5, "Big5-HKSCS"},
- {PG_BIG5, "CP950"},
-
- {PG_GBK, "GBK"},
- {PG_GBK, "CP936"},
-
- {PG_UHC, "UHC"},
- {PG_UHC, "CP949"},
-
- {PG_JOHAB, "JOHAB"},
- {PG_JOHAB, "CP1361"},
-
- {PG_GB18030, "GB18030"},
- {PG_GB18030, "CP54936"},
-
- {PG_SHIFT_JIS_2004, "SJIS_2004"},
-
- {PG_SQL_ASCII, "US-ASCII"},
-
- {PG_SQL_ASCII, NULL} /* end marker */
-};
-
-#ifdef WIN32
-/*
- * On Windows, use CP<code page number> instead of the nl_langinfo() result
- *
- * Visual Studio 2012 expanded the set of valid LC_CTYPE values, so have its
- * locale machinery determine the code page. See comments at IsoLocaleName().
- * For other compilers, follow the locale's predictable format.
- *
- * Visual Studio 2015 should still be able to do the same, but the declaration
- * of lc_codepage is missing in _locale_t, causing this code compilation to
- * fail, hence this falls back instead on GetLocaleInfoEx. VS 2015 may be an
- * exception and post-VS2015 versions should be able to handle properly the
- * codepage number using _create_locale(). So, instead of the same logic as
- * VS 2012 and VS 2013, this routine uses GetLocaleInfoEx to parse short
- * locale names like "de-DE", "fr-FR", etc. If those cannot be parsed correctly
- * process falls back to the pre-VS-2010 manual parsing done with
- * using <Language>_<Country>.<CodePage> as a base.
- *
- * Returns a malloc()'d string for the caller to free.
- */
-static char *
-win32_langinfo(const char *ctype)
-{
- char *r = NULL;
-
-#if (_MSC_VER >= 1700) && (_MSC_VER < 1900)
- _locale_t loct = NULL;
-
- loct = _create_locale(LC_CTYPE, ctype);
- if (loct != NULL)
- {
- r = malloc(16); /* excess */
- if (r != NULL)
- sprintf(r, "CP%u", loct->locinfo->lc_codepage);
- _free_locale(loct);
- }
-#else
- char *codepage;
-
-#if (_MSC_VER >= 1900)
- uint32 cp;
- WCHAR wctype[LOCALE_NAME_MAX_LENGTH];
-
- memset(wctype, 0, sizeof(wctype));
- MultiByteToWideChar(CP_ACP, 0, ctype, -1, wctype, LOCALE_NAME_MAX_LENGTH);
-
- if (GetLocaleInfoEx(wctype,
- LOCALE_IDEFAULTANSICODEPAGE | LOCALE_RETURN_NUMBER,
- (LPWSTR) &cp, sizeof(cp) / sizeof(WCHAR)) > 0)
- {
- r = malloc(16); /* excess */
- if (r != NULL)
- sprintf(r, "CP%u", cp);
- }
- else
-#endif
- {
- /*
- * Locale format on Win32 is <Language>_<Country>.<CodePage> . For
- * example, English_United States.1252.
- */
- codepage = strrchr(ctype, '.');
- if (codepage != NULL)
- {
- int ln;
-
- codepage++;
- ln = strlen(codepage);
- r = malloc(ln + 3);
- if (r != NULL)
- sprintf(r, "CP%s", codepage);
- }
-
- }
-#endif
-
- return r;
-}
-
-#ifndef FRONTEND
-/*
- * Given a Windows code page identifier, find the corresponding PostgreSQL
- * encoding. Issue a warning and return -1 if none found.
- */
-int
-pg_codepage_to_encoding(UINT cp)
-{
- char sys[16];
- int i;
-
- sprintf(sys, "CP%u", cp);
-
- /* Check the table */
- for (i = 0; encoding_match_list[i].system_enc_name; i++)
- if (pg_strcasecmp(sys, encoding_match_list[i].system_enc_name) == 0)
- return encoding_match_list[i].pg_enc_code;
-
- ereport(WARNING,
- (errmsg("could not determine encoding for codeset \"%s\"", sys),
- errdetail("Please report this to <pgsql-bugs@postgresql.org>.")));
-
- return -1;
-}
-#endif
-#endif /* WIN32 */
-
-#if (defined(HAVE_LANGINFO_H) && defined(CODESET)) || defined(WIN32)
-
-/*
- * Given a setting for LC_CTYPE, return the Postgres ID of the associated
- * encoding, if we can determine it. Return -1 if we can't determine it.
- *
- * Pass in NULL to get the encoding for the current locale setting.
- * Pass "" to get the encoding selected by the server's environment.
- *
- * If the result is PG_SQL_ASCII, callers should treat it as being compatible
- * with any desired encoding.
- *
- * If running in the backend and write_message is false, this function must
- * cope with the possibility that elog() and palloc() are not yet usable.
- */
-int
-pg_get_encoding_from_locale(const char *ctype, bool write_message)
-{
- char *sys;
- int i;
-
- /* Get the CODESET property, and also LC_CTYPE if not passed in */
- if (ctype)
- {
- char *save;
- char *name;
-
- /* If locale is C or POSIX, we can allow all encodings */
- if (pg_strcasecmp(ctype, "C") == 0 ||
- pg_strcasecmp(ctype, "POSIX") == 0)
- return PG_SQL_ASCII;
-
- save = setlocale(LC_CTYPE, NULL);
- if (!save)
- return -1; /* setlocale() broken? */
- /* must copy result, or it might change after setlocale */
- save = strdup(save);
- if (!save)
- return -1; /* out of memory; unlikely */
-
- name = setlocale(LC_CTYPE, ctype);
- if (!name)
- {
- free(save);
- return -1; /* bogus ctype passed in? */
- }
-
-#ifndef WIN32
- sys = nl_langinfo(CODESET);
- if (sys)
- sys = strdup(sys);
-#else
- sys = win32_langinfo(name);
-#endif
-
- setlocale(LC_CTYPE, save);
- free(save);
- }
- else
- {
- /* much easier... */
- ctype = setlocale(LC_CTYPE, NULL);
- if (!ctype)
- return -1; /* setlocale() broken? */
-
- /* If locale is C or POSIX, we can allow all encodings */
- if (pg_strcasecmp(ctype, "C") == 0 ||
- pg_strcasecmp(ctype, "POSIX") == 0)
- return PG_SQL_ASCII;
-
-#ifndef WIN32
- sys = nl_langinfo(CODESET);
- if (sys)
- sys = strdup(sys);
-#else
- sys = win32_langinfo(ctype);
-#endif
- }
-
- if (!sys)
- return -1; /* out of memory; unlikely */
-
- /* Check the table */
- for (i = 0; encoding_match_list[i].system_enc_name; i++)
- {
- if (pg_strcasecmp(sys, encoding_match_list[i].system_enc_name) == 0)
- {
- free(sys);
- return encoding_match_list[i].pg_enc_code;
- }
- }
-
- /* Special-case kluges for particular platforms go here */
-
-#ifdef __darwin__
-
- /*
- * Current OS X has many locales that report an empty string for CODESET,
- * but they all seem to actually use UTF-8.
- */
- if (strlen(sys) == 0)
- {
- free(sys);
- return PG_UTF8;
- }
-#endif
-
- /*
- * We print a warning if we got a CODESET string but couldn't recognize
- * it. This means we need another entry in the table.
- */
- if (write_message)
- {
-#ifdef FRONTEND
- fprintf(stderr, _("could not determine encoding for locale \"%s\": codeset is \"%s\""),
- ctype, sys);
- /* keep newline separate so there's only one translatable string */
- fputc('\n', stderr);
-#else
- ereport(WARNING,
- (errmsg("could not determine encoding for locale \"%s\": codeset is \"%s\"",
- ctype, sys),
- errdetail("Please report this to <pgsql-bugs@postgresql.org>.")));
-#endif
- }
-
- free(sys);
- return -1;
-}
-#else /* (HAVE_LANGINFO_H && CODESET) || WIN32 */
-
-/*
- * stub if no multi-language platform support
- *
- * Note: we could return -1 here, but that would have the effect of
- * forcing users to specify an encoding to initdb on such platforms.
- * It seems better to silently default to SQL_ASCII.
- */
-int
-pg_get_encoding_from_locale(const char *ctype, bool write_message)
-{
- return PG_SQL_ASCII;
-}
-
-#endif /* (HAVE_LANGINFO_H && CODESET) || WIN32 */