/*------------------------------------------------------------------------- * * 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 #endif #include #ifdef HAVE_LANGINFO_H #include #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 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 _. 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 _. . 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 ."))); 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 ."))); #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 */