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Add code to be able to match the timezone name on localized Windows 

systems.  Magnus Hagander.
This commit is contained in:
Tom Lane 2004-09-01 16:21:50 +00:00
parent 0b143dd725
commit d1b2260cdc
1 changed files with 108 additions and 1 deletions
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109
src/timezone/pgtz.c
View File

@ -6,7 +6,7 @@
* Portions Copyright (c) 1996-2004, PostgreSQL Global Development Group
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/timezone/pgtz.c,v 1.24 2004/08/30 02:54:42 momjian Exp $
* $PostgreSQL: pgsql/src/timezone/pgtz.c,v 1.25 2004/09/01 16:21:50 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -822,8 +822,11 @@ identify_system_timezone(void)
{
int i;
char tzname[128];
char localtzname[256];
time_t t = time(NULL);
struct tm *tm = localtime(&t);
HKEY rootKey;
int idx;
if (!tm)
{
@ -846,6 +849,110 @@ identify_system_timezone(void)
}
}
/*
* Localized Windows versions return localized names for the
* timezone. Scan the registry to find the English name,
* and then try matching against our table again.
*/
memset(localtzname, 0, sizeof(localtzname));
if (RegOpenKeyEx(HKEY_LOCAL_MACHINE,
"SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Time Zones",
0,
KEY_READ,
&rootKey) != ERROR_SUCCESS)
{
ereport(WARNING,
(errmsg_internal("could not open registry key to identify Windows timezone: %i", (int)GetLastError())));
return NULL;
}
for (idx = 0; ; idx++)
{
char keyname[256];
char zonename[256];
DWORD namesize;
FILETIME lastwrite;
HKEY key;
LONG r;
memset(keyname, 0, sizeof(keyname));
namesize = sizeof(keyname);
if ((r=RegEnumKeyEx(rootKey,
idx,
keyname,
&namesize,
NULL,
NULL,
NULL,
&lastwrite)) != ERROR_SUCCESS)
{
if (r == ERROR_NO_MORE_ITEMS)
break;
ereport(WARNING,
(errmsg_internal("could not enumerate registry subkeys to identify Windows timezone: %i", (int)r)));
break;
}
if ((r=RegOpenKeyEx(rootKey,keyname,0,KEY_READ,&key)) != ERROR_SUCCESS)
{
ereport(WARNING,
(errmsg_internal("could not open registry subkey to identify Windows timezone: %i", (int)r)));
break;
}
memset(zonename, 0, sizeof(zonename));
namesize = sizeof(zonename);
if ((r=RegQueryValueEx(key, "Std", NULL, NULL, zonename, &namesize)) != ERROR_SUCCESS)
{
ereport(WARNING,
(errmsg_internal("could not query value for 'std' to identify Windows timezone: %i", (int)r)));
RegCloseKey(key);
break;
}
if (strcmp(tzname, zonename) == 0)
{
/* Matched zone */
strcpy(localtzname, keyname);
RegCloseKey(key);
break;
}
memset(zonename, 0, sizeof(zonename));
namesize = sizeof(zonename);
if ((r=RegQueryValueEx(key, "Dlt", NULL, NULL, zonename, &namesize)) != ERROR_SUCCESS)
{
ereport(WARNING,
(errmsg_internal("could not query value for 'dlt' to identify Windows timezone: %i", (int)r)));
RegCloseKey(key);
break;
}
if (strcmp(tzname, zonename) == 0)
{
/* Matched DST zone */
strcpy(localtzname, keyname);
RegCloseKey(key);
break;
}
RegCloseKey(key);
}
RegCloseKey(rootKey);
if (localtzname[0])
{
/* Found a localized name, so scan for that one too */
for (i = 0; win32_tzmap[i].stdname != NULL; i++)
{
if (strcmp(localtzname, win32_tzmap[i].stdname) == 0 ||
strcmp(localtzname, win32_tzmap[i].dstname) == 0)
{
elog(DEBUG4, "TZ \"%s\" matches localized Windows timezone \"%s\" (\"%s\")",
win32_tzmap[i].pgtzname, tzname, localtzname);
return win32_tzmap[i].pgtzname;
}
}
}
ereport(WARNING,
(errmsg("could not find a match for Windows timezone \"%s\"",
tzname)));