libc_interface.c

来自「Linux下的多协议即时通讯程序源代码」· C语言 代码 · 共 1,100 行 · 第 1/2 页

		"EST", "EST"
	},
	{
		"Azores Standard Time", "Azores Daylight Time",
		"AZOT", "AZOST"
	},
	{
		"Canada Central Standard Time", "Canada Central Daylight Time",
		"CST", "MDT"
	},
	{
		"Cape Verde Standard Time", "Cape Verde Daylight Time",
		"CVT", "CVST"
	},
	{
		"Caucasus Standard Time", "Caucasus Daylight Time",
		"AZT", "AZST"
	},
	{
		"Cen. Australia Standard Time", "Cen. Australia Daylight Time",
		"CST", "CST"
	},
	{
		"Central America Standard Time", "Central America Daylight Time",
		"CST", "CDT"
	},
	{
		"Central Asia Standard Time", "Central Asia Daylight Time",
		"BDT", "BDT"
	},
	{
		"Central Europe Standard Time", "Central Europe Daylight Time",
		"CET", "CEST"
	},
	{
		"Central European Standard Time", "Central European Daylight Time",
		"CET", "CEST"
	},
	{
		"Central Pacific Standard Time", "Central Pacific Daylight Time",
		"NCT", "NCST"
	},
	{
		"Central Standard Time", "Central Daylight Time",
		"CST", "CDT"
	},
	{
		"China Standard Time", "China Daylight Time",
		"HKT", "HKST"
	},
	{
		"Dateline Standard Time", "Dateline Daylight Time",
		"GMT+12", "GMT+12"
	},
	{
		"E. Africa Standard Time", "E. Africa Daylight Time",
		"EAT", "EAT"
	},
	{
		"E. Australia Standard Time", "E. Australia Daylight Time",
		"EST", "EST"
	},
	{
		"E. Europe Standard Time", "E. Europe Daylight Time",
		"EET", "EEST"
	},
	{
		"E. South America Standard Time", "E. South America Daylight Time",
		"BRT", "BRST"
	},
	{
		"Eastern Standard Time", "Eastern Daylight Time",
		"EST", "EDT"
	},
	{
		"Egypt Standard Time", "Egypt Daylight Time",
		"EET", "EEST"
	},
	{
		"Ekaterinburg Standard Time", "Ekaterinburg Daylight Time",
		"YEKT", "YEKST"
	},
	{
		"Fiji Standard Time", "Fiji Daylight Time",
		"FJT", "FJST"
	},
	{
		"FLE Standard Time", "FLE Daylight Time",
		"EET", "EEST"
	},
	{
		"GMT Standard Time", "GMT Daylight Time",
		"GMT", "IST"
	},
	{
		"Greenland Standard Time", "Greenland Daylight Time",
		"WGT", "WGST"
	},
	{
		"Greenwich Standard Time", "Greenwich Daylight Time",
		"WET", "WEST"
	},
	{
		"GTB Standard Time", "GTB Daylight Time",
		"EET", "EEST"
	},
	{
		"Hawaiian Standard Time", "Hawaiian Daylight Time",
		"HST", "HPT"
	},
	{
		"India Standard Time", "India Daylight Time",
		"IST", "IST"
	},
	{
		"Iran Standard Time", "Iran Daylight Time",
		"IRST", "IRDT"
	},
	{
		"Jerusalem Standard Time", "Jerusalem Daylight Time",
		"IST", "IDT"
	},
	{
		"Korea Standard Time", "Korea Daylight Time",
		"KST", "KDT"
	},
	{
		"Mexico Standard Time", "Mexico Daylight Time",
		"CST", "CDT"
	},
	{
		"Mexico Standard Time", "Mexico Daylight Time",
		"BOT", "BOST"
	},
	{
		"Mid-Atlantic Standard Time", "Mid-Atlantic Daylight Time",
		"GST", "GST"
	},
	{
		"Mountain Standard Time", "Mountain Daylight Time",
		"MST", "MDT"
	},
	{
		"Myanmar Standard Time", "Myanmar Daylight Time",
		"MMT", "MMT"
	},
	{
		"N. Central Asia Standard Time", "N. Central Asia Daylight Time",
		"ALMT", "ALMST"
	},
	{
		"Nepal Standard Time", "Nepal Daylight Time",
		"NPT", "NPT"
	},
	{
		"New Zealand Standard Time", "New Zealand Daylight Time",
		"NZST", "NZDT"
	},
	{
		"Newfoundland Standard Time", "Newfoundland Daylight Time",
		"NST", "NDT"
	},
	{
		"North Asia East Standard Time", "North Asia East Daylight Time",
		"IRKT", "IRKST"
	},
	{
		"North Asia Standard Time", "North Asia Daylight Time",
		"KRAT", "KRAST"
	},
	{
		"Pacific SA Standard Time", "Pacific SA Daylight Time",
		"CLT", "CLST"
	},
	{
		"Pacific Standard Time", "Pacific Daylight Time",
		"PST", "PDT"
	},
	{
		"Romance Standard Time", "Romance Daylight Time",
		"CET", "CEST"
	},
	{
		"Russian Standard Time", "Russian Daylight Time",
		"MSK", "MSD"
	},
	{
		"SA Eastern Standard Time", "SA Eastern Daylight Time",
		"ART", "ARST"
	},
	{
		"SA Pacific Standard Time", "SA Pacific Daylight Time",
		"COT", "COST"
	},
	{
		"SA Western Standard Time", "SA Western Daylight Time",
		"VET", "VET"
	},
	{
		"Samoa Standard Time", "Samoa Daylight Time",
		"SST", "NDT"
	},
	{
		"SE Asia Standard Time", "SE Asia Daylight Time",
		"ICT", "ICT"
	},
	{
		"Malay Peninsula Standard Time", "Malay Peninsula Daylight Time",
		"MYT", "MALST"
	},
	{
		"South Africa Standard Time", "South Africa Daylight Time",
		"CAT", "CAT"
	},
	{
		"Sri Lanka Standard Time", "Sri Lanka Daylight Time",
		"LKT", "IST"
	},
	{
		"Taipei Standard Time", "Taipei Daylight Time",
		"CST", "CDT"
	},
	{
		"Tasmania Standard Time", "Tasmania Daylight Time",
		"EST", "EST"
	},
	{
		"Tokyo Standard Time", "Tokyo Daylight Time",
		"JST", "JDT"
	},
	{
		"Tonga Standard Time", "Tonga Daylight Time",
		"TOT", "TOST"
	},
	{
		"US Eastern Standard Time", "US Eastern Daylight Time",
		"EST", "EDT"
	},
	{
		"US Mountain Standard Time", "US Mountain Daylight Time",
		"MST", "MDT"
	},
	{
		"Vladivostok Standard Time", "Vladivostok Daylight Time",
		"VLAT", "VLAST"
	},
	{
		"W. Australia Standard Time", "W. Australia Daylight Time",
		"WST", "WST"
	},

	/* Not mapped in PostgreSQL.
	 *
	 * I mapped this based on the following information... -- rlaager
	 * $ cd /usr/share/zoneinfo/Africa
	 * $ for i in * ; do echo `TZ=Africa/$i date +"%z %Z"` $i ; done | grep +0100
	 * +0100 CET Algiers
	 * +0100 WAT Bangui
	 * +0100 WAT Brazzaville
	 * +0100 CET Ceuta
	 * +0100 WAT Douala
	 * +0100 WAT Kinshasa
	 * +0100 WAT Lagos
	 * +0100 WAT Libreville
	 * +0100 WAT Luanda
	 * +0100 WAT Malabo
	 * +0100 WAT Ndjamena
	 * +0100 WAT Niamey
	 * +0100 WAT Porto-Novo
	 * +0100 CET Tunis
	 **/
	{
		"W. Central Africa Standard Time", "W. Central Africa Daylight Time",
		"WAT", "WAT"
	},

	{
		"W. Europe Standard Time", "W. Europe Daylight Time",
		"CET", "CEST"
	},
	{
		"West Asia Standard Time", "West Asia Daylight Time",
		"PKT", "PKST"
	},
	{
		"West Pacific Standard Time", "West Pacific Daylight Time",
		"ChST", "ChST"
	},
	{
		"Yakutsk Standard Time", "Yakutsk Daylight Time",
		"YAKT", "YAKST"
	},
	{
		NULL, NULL,
		NULL, NULL
	}
};

const char *
wpurple_get_timezone_abbreviation(const struct tm *tm)
{
	int i;
	char tzname[128];
	char localtzname[256];
	HKEY rootKey;
	int idx;

	if (!tm)
	{
		purple_debug_warning("wpurple", "could not determine current date/time: localtime failed\n");
		return "";
	}

	if (strftime(tzname, sizeof(tzname) - 1, "%Z", tm) == 0)
	{
		purple_debug_error("wpurple", "timezone name is too long for the buffer\n");
		return "";
	}

	for (i = 0; win32_tzmap[i].wstd != NULL; i++)
	{
		if (strcmp(tzname, win32_tzmap[i].wstd) == 0)
		{
#if 0
			purple_debug_info("wpurple", "TZ \"%s\" matches Windows timezone \"%s\"\n",
			                win32_tzmap[i].ustd, tzname);
#endif
			/* Cache the Result */
			if (i > 0) {
				if (win32_tzmap[0].wstd[0] != '\0')
					g_free(win32_tzmap[0].wstd);
				win32_tzmap[0].wstd = g_strdup(tzname);
				win32_tzmap[0].ustd = win32_tzmap[i].ustd;
			}

			return win32_tzmap[i].ustd;
		}
		if (strcmp(tzname, win32_tzmap[i].wdst) == 0)
		{
#if 0
			purple_debug_info("wpurple", "TZ \"%s\" matches Windows timezone \"%s\"\n",
			                win32_tzmap[i].udst, tzname);
#endif
			/* Cache the Result */
			if (i > 0) {
				if (win32_tzmap[0].wdst[0] != '\0')
					g_free(win32_tzmap[0].wdst);
				win32_tzmap[0].wdst = g_strdup(tzname);
				win32_tzmap[0].udst = win32_tzmap[i].udst;
			}

			return win32_tzmap[i].udst;
		}
	}

	/*
	 * 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)
	{
		purple_debug_warning("wpurple", "could not open registry key to identify Windows timezone: %i\n", (int) GetLastError());
		return "";
	}

	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;
			purple_debug_warning("wpurple", "could not enumerate registry subkeys to identify Windows timezone: %i\n", (int) r);
			break;
		}

		if ((r = RegOpenKeyEx(rootKey, keyname, 0, KEY_READ, &key)) != ERROR_SUCCESS)
		{
			purple_debug_warning("wpurple", "could not open registry subkey to identify Windows timezone: %i\n", (int) r);
			break;
		}

		memset(zonename, 0, sizeof(zonename));
		namesize = sizeof(zonename);
		if ((r = RegQueryValueEx(key, "Std", NULL, NULL, zonename, &namesize)) != ERROR_SUCCESS)
		{
			purple_debug_warning("wpurple", "could not query value for 'std' to identify Windows timezone: %i\n", (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)
		{
			purple_debug_warning("wpurple", "could not query value for 'dlt' to identify Windows timezone: %i\n", (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].wstd != NULL; i++)
		{
			if (strcmp(localtzname, win32_tzmap[i].wstd) == 0)
			{
#if 0
				purple_debug_info("wpurple", "TZ \"%s\" matches localized Windows timezone \"%s\" (\"%s\")\n",
				                win32_tzmap[i].ustd, tzname, localtzname);
#endif
				/* Cache the Result */
				if (win32_tzmap[0].wstd[0] != '\0')
					g_free(win32_tzmap[0].wstd);
				win32_tzmap[0].wstd = g_strdup(tzname);
				win32_tzmap[0].ustd = win32_tzmap[i].ustd;

				return win32_tzmap[i].ustd;
			}
			if (strcmp(localtzname, win32_tzmap[i].wdst) == 0)
			{
#if 0
				purple_debug_info("wpurple", "TZ \"%s\" matches localized Windows timezone \"%s\" (\"%s\")\n",
				                win32_tzmap[i].udst, tzname, localtzname);
#endif
				/* Cache the Result */
				if (win32_tzmap[0].wdst[0] != '\0')
					g_free(win32_tzmap[0].wdst);

				win32_tzmap[0].wdst = g_strdup(tzname);
				win32_tzmap[0].udst = win32_tzmap[i].udst;

				return win32_tzmap[i].udst;
			}
		}
	}

	purple_debug_warning("wpurple", "could not find a match for Windows timezone \"%s\"\n", tzname);
	return "";
}

#if !GLIB_CHECK_VERSION(2,8,0)
/**
 * g_access:
 * @filename: a pathname in the GLib file name encoding (UTF-8 on Windows)
 * @mode: as in access()
 *
 * A wrapper for the POSIX access() function. This function is used to
 * test a pathname for one or several of read, write or execute
 * permissions, or just existence. On Windows, the underlying access()
 * function in the C library only checks the READONLY attribute, and
 * does not look at the ACL at all. Software that needs to handle file
 * permissions on Windows more exactly should use the Win32 API.
 *
 * See the C library manual for more details about access().
 *
 * Returns: zero if the pathname refers to an existing file system
 * object that has all the tested permissions, or -1 otherwise or on
 * error.
 *
 * Since: 2.8
 */
int
wpurple_g_access (const gchar *filename,
	  int          mode)
{
  if (G_WIN32_HAVE_WIDECHAR_API ())
    {
      wchar_t *wfilename = g_utf8_to_utf16 (filename, -1, NULL, NULL, NULL);
      int retval;
      int save_errno;

      if (wfilename == NULL)
	{
	  errno = EINVAL;
	  return -1;
	}

      retval = _waccess (wfilename, mode);
      save_errno = errno;

      g_free (wfilename);

      errno = save_errno;
      return retval;
    }
  else
    {
      gchar *cp_filename = g_locale_from_utf8 (filename, -1, NULL, NULL, NULL);
      int retval;
      int save_errno;

      if (cp_filename == NULL)
	{
	  errno = EINVAL;
	  return -1;
	}

      retval = access (cp_filename, mode);
      save_errno = errno;

      g_free (cp_filename);

      errno = save_errno;
      return retval;
    }
}
#endif