Add C comments for recent to_char('L') fix for Win32.
This commit is contained in:
parent
90e04bab39
commit
22da73198f
|
@ -4,7 +4,7 @@
|
|||
*
|
||||
* Portions Copyright (c) 2002-2010, PostgreSQL Global Development Group
|
||||
*
|
||||
* $PostgreSQL: pgsql/src/backend/utils/adt/pg_locale.c,v 1.54 2010/04/22 01:55:52 itagaki Exp $
|
||||
* $PostgreSQL: pgsql/src/backend/utils/adt/pg_locale.c,v 1.55 2010/04/24 22:54:56 momjian Exp $
|
||||
*
|
||||
*-----------------------------------------------------------------------
|
||||
*/
|
||||
|
@ -41,6 +41,10 @@
|
|||
* DOES NOT WORK RELIABLY: on some platforms the second setlocale() call
|
||||
* will change the memory save is pointing at. To do this sort of thing
|
||||
* safely, you *must* pstrdup what setlocale returns the first time.
|
||||
*
|
||||
* FYI, The Open Group locale standard is defined here:
|
||||
*
|
||||
* http://www.opengroup.org/onlinepubs/009695399/basedefs/xbd_chap07.html
|
||||
*----------
|
||||
*/
|
||||
|
||||
|
@ -424,7 +428,6 @@ PGLC_localeconv(void)
|
|||
char *grouping;
|
||||
char *thousands_sep;
|
||||
int encoding;
|
||||
|
||||
#ifdef WIN32
|
||||
char *save_lc_ctype;
|
||||
#endif
|
||||
|
@ -435,25 +438,48 @@ PGLC_localeconv(void)
|
|||
|
||||
free_struct_lconv(&CurrentLocaleConv);
|
||||
|
||||
/* Set user's values of monetary and numeric locales */
|
||||
/* Save user's values of monetary and numeric locales */
|
||||
save_lc_monetary = setlocale(LC_MONETARY, NULL);
|
||||
if (save_lc_monetary)
|
||||
save_lc_monetary = pstrdup(save_lc_monetary);
|
||||
|
||||
save_lc_numeric = setlocale(LC_NUMERIC, NULL);
|
||||
if (save_lc_numeric)
|
||||
save_lc_numeric = pstrdup(save_lc_numeric);
|
||||
|
||||
#ifdef WIN32
|
||||
/* set user's value of ctype locale */
|
||||
/*
|
||||
* Ideally, monetary and numeric local symbols could be returned in
|
||||
* any server encoding. Unfortunately, the WIN32 API does not allow
|
||||
* setlocale() to return values in a codepage/CTYPE that uses more
|
||||
* than two bytes per character, like UTF-8:
|
||||
*
|
||||
* http://msdn.microsoft.com/en-us/library/x99tb11d.aspx
|
||||
*
|
||||
* Evidently, LC_CTYPE allows us to control the encoding used
|
||||
* for strings returned by localeconv(). The Open Group
|
||||
* standard, mentioned at the top of this C file, doesn't
|
||||
* explicitly state this.
|
||||
*
|
||||
* Therefore, we set LC_CTYPE to match LC_NUMERIC or LC_MONETARY
|
||||
* (which cannot be UTF8), call localeconv(), and then convert from
|
||||
* the numeric/monitary LC_CTYPE to the server encoding. One
|
||||
* example use of this is for the Euro symbol.
|
||||
*
|
||||
* Perhaps someday we will use GetLocaleInfoW() which returns values
|
||||
* in UTF16 and convert from that.
|
||||
*/
|
||||
|
||||
/* save user's value of ctype locale */
|
||||
save_lc_ctype = setlocale(LC_CTYPE, NULL);
|
||||
if (save_lc_ctype)
|
||||
save_lc_ctype = pstrdup(save_lc_ctype);
|
||||
|
||||
/* use numeric to set the ctype */
|
||||
setlocale(LC_CTYPE, locale_numeric);
|
||||
#endif
|
||||
|
||||
/* Get formatting information for numeric */
|
||||
#ifdef WIN32
|
||||
setlocale(LC_CTYPE, locale_numeric);
|
||||
#endif
|
||||
setlocale(LC_NUMERIC, locale_numeric);
|
||||
extlconv = localeconv();
|
||||
encoding = pg_get_encoding_from_locale(locale_numeric);
|
||||
|
@ -462,10 +488,12 @@ PGLC_localeconv(void)
|
|||
thousands_sep = db_encoding_strdup(encoding, extlconv->thousands_sep);
|
||||
grouping = strdup(extlconv->grouping);
|
||||
|
||||
/* Get formatting information for monetary */
|
||||
#ifdef WIN32
|
||||
/* use monetary to set the ctype */
|
||||
setlocale(LC_CTYPE, locale_monetary);
|
||||
#endif
|
||||
|
||||
/* Get formatting information for monetary */
|
||||
setlocale(LC_MONETARY, locale_monetary);
|
||||
extlconv = localeconv();
|
||||
encoding = pg_get_encoding_from_locale(locale_monetary);
|
||||
|
@ -500,7 +528,7 @@ PGLC_localeconv(void)
|
|||
}
|
||||
|
||||
#ifdef WIN32
|
||||
/* try to restore internal ctype settings */
|
||||
/* Try to restore internal ctype settings */
|
||||
if (save_lc_ctype)
|
||||
{
|
||||
setlocale(LC_CTYPE, save_lc_ctype);
|
||||
|
@ -514,13 +542,15 @@ PGLC_localeconv(void)
|
|||
|
||||
#ifdef WIN32
|
||||
/*
|
||||
* On win32, strftime() returns the encoding in CP_ACP, which is likely
|
||||
* different from SERVER_ENCODING. This is especially important in Japanese
|
||||
* versions of Windows which will use SJIS encoding, which we don't support
|
||||
* as a server encoding.
|
||||
* On WIN32, strftime() returns the encoding in CP_ACP (the default
|
||||
* operating system codpage for that computer), which is likely different
|
||||
* from SERVER_ENCODING. This is especially important in Japanese versions
|
||||
* of Windows which will use SJIS encoding, which we don't support as a
|
||||
* server encoding.
|
||||
*
|
||||
* Replace strftime() with a version that gets the string in UTF16 and then
|
||||
* converts it to the appropriate encoding as necessary.
|
||||
* So, instead of using strftime(), use wcsftime() to return the value in
|
||||
* wide characters (internally UTF16) and then convert it to the appropriate
|
||||
* database encoding.
|
||||
*
|
||||
* Note that this only affects the calls to strftime() in this file, which are
|
||||
* used to get the locale-aware strings. Other parts of the backend use
|
||||
|
@ -537,7 +567,6 @@ strftime_win32(char *dst, size_t dstlen, const wchar_t *format, const struct tm
|
|||
|
||||
len = wcsftime(wbuf, MAX_L10N_DATA, format, tm);
|
||||
if (len == 0)
|
||||
|
||||
/*
|
||||
* strftime call failed - return 0 with the contents of dst
|
||||
* unspecified
|
||||
|
@ -564,7 +593,9 @@ strftime_win32(char *dst, size_t dstlen, const wchar_t *format, const struct tm
|
|||
return len;
|
||||
}
|
||||
|
||||
/* redefine strftime() */
|
||||
#define strftime(a,b,c,d) strftime_win32(a,b,L##c,d)
|
||||
|
||||
#endif /* WIN32 */
|
||||
|
||||
|
||||
|
@ -580,7 +611,6 @@ cache_locale_time(void)
|
|||
char buf[MAX_L10N_DATA];
|
||||
char *ptr;
|
||||
int i;
|
||||
|
||||
#ifdef WIN32
|
||||
char *save_lc_ctype;
|
||||
#endif
|
||||
|
@ -591,20 +621,22 @@ cache_locale_time(void)
|
|||
|
||||
elog(DEBUG3, "cache_locale_time() executed; locale: \"%s\"", locale_time);
|
||||
|
||||
/* save user's value of time locale */
|
||||
save_lc_time = setlocale(LC_TIME, NULL);
|
||||
if (save_lc_time)
|
||||
save_lc_time = pstrdup(save_lc_time);
|
||||
|
||||
#ifdef WIN32
|
||||
/* set user's value of ctype locale */
|
||||
/* See the WIN32 comment near the top of PGLC_localeconv() */
|
||||
/* save user's value of ctype locale */
|
||||
save_lc_ctype = setlocale(LC_CTYPE, NULL);
|
||||
if (save_lc_ctype)
|
||||
save_lc_ctype = pstrdup(save_lc_ctype);
|
||||
|
||||
/* use lc_time to set the ctype */
|
||||
setlocale(LC_CTYPE, locale_time);
|
||||
#endif
|
||||
|
||||
/* set user's value of time locale */
|
||||
save_lc_time = setlocale(LC_TIME, NULL);
|
||||
if (save_lc_time)
|
||||
save_lc_time = pstrdup(save_lc_time);
|
||||
|
||||
setlocale(LC_TIME, locale_time);
|
||||
|
||||
timenow = time(NULL);
|
||||
|
|
Loading…
Reference in New Issue