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Diffstat (limited to 'src/timezone/pgtz.c')
-rw-r--r--src/timezone/pgtz.c132
1 files changed, 77 insertions, 55 deletions
diff --git a/src/timezone/pgtz.c b/src/timezone/pgtz.c
index 5356f40e3ca..1fde0854d6e 100644
--- a/src/timezone/pgtz.c
+++ b/src/timezone/pgtz.c
@@ -6,7 +6,7 @@
* Portions Copyright (c) 1996-2003, PostgreSQL Global Development Group
*
* IDENTIFICATION
- * $PostgreSQL: pgsql/src/timezone/pgtz.c,v 1.10 2004/05/21 05:08:06 tgl Exp $
+ * $PostgreSQL: pgsql/src/timezone/pgtz.c,v 1.11 2004/05/21 12:30:25 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@@ -45,36 +45,46 @@ pg_TZDIR(void)
* set in our own library).
*/
#define T_YEAR (60*60*24*365)
-#define T_MONTH (60*60*24*30)
+#define T_MONTH (60*60*24*30)
-struct tztry {
- time_t std_t,dst_t;
- char std_time[TZ_STRLEN_MAX+1],dst_time[TZ_STRLEN_MAX+1];
- int std_ofs,dst_ofs;
- struct tm std_tm, dst_tm;
+struct tztry
+{
+ time_t std_t,
+ dst_t;
+ char std_time[TZ_STRLEN_MAX + 1],
+ dst_time[TZ_STRLEN_MAX + 1];
+ int std_ofs,
+ dst_ofs;
+ struct tm std_tm,
+ dst_tm;
};
-static bool compare_tm(struct tm *s, struct pg_tm *p) {
- if (s->tm_sec != p->tm_sec ||
- s->tm_min != p->tm_min ||
- s->tm_hour != p->tm_hour ||
- s->tm_mday != p->tm_mday ||
- s->tm_mon != p->tm_mon ||
- s->tm_year != p->tm_year ||
- s->tm_wday != p->tm_wday ||
- s->tm_yday != p->tm_yday ||
+static bool
+compare_tm(struct tm * s, struct pg_tm * p)
+{
+ if (s->tm_sec != p->tm_sec ||
+ s->tm_min != p->tm_min ||
+ s->tm_hour != p->tm_hour ||
+ s->tm_mday != p->tm_mday ||
+ s->tm_mon != p->tm_mon ||
+ s->tm_year != p->tm_year ||
+ s->tm_wday != p->tm_wday ||
+ s->tm_yday != p->tm_yday ||
s->tm_isdst != p->tm_isdst)
return false;
return true;
}
-static bool try_timezone(char *tzname, struct tztry *tt, bool checkdst) {
+static bool
+try_timezone(char *tzname, struct tztry * tt, bool checkdst)
+{
struct pg_tm *pgtm;
if (!pg_tzset(tzname))
- return false; /* If this timezone couldn't be picked at all */
-
+ return false; /* If this timezone couldn't be picked at
+ * all */
+
/* Verify standard time */
pgtm = pg_localtime(&(tt->std_t));
if (!pgtm)
@@ -95,7 +105,9 @@ static bool try_timezone(char *tzname, struct tztry *tt, bool checkdst) {
return true;
}
-static int get_timezone_offset(struct tm *tm) {
+static int
+get_timezone_offset(struct tm * tm)
+{
#if defined(HAVE_STRUCT_TM_TM_ZONE)
return tm->tm_gmtoff;
#elif defined(HAVE_INT_TIMEZONE)
@@ -113,12 +125,15 @@ static int get_timezone_offset(struct tm *tm) {
#ifdef WIN32
#define TZABBREV(tz) win32_get_timezone_abbrev(tz)
-static char *win32_get_timezone_abbrev(char *tz) {
- static char w32tzabbr[TZ_STRLEN_MAX+1];
- int l = 0;
- char *c;
+static char *
+win32_get_timezone_abbrev(char *tz)
+{
+ static char w32tzabbr[TZ_STRLEN_MAX + 1];
+ int l = 0;
+ char *c;
- for (c = tz; *c; c++) {
+ for (c = tz; *c; c++)
+ {
if (isupper(*c))
w32tzabbr[l++] = *c;
}
@@ -140,47 +155,50 @@ static char *win32_get_timezone_abbrev(char *tz) {
static char *
identify_system_timezone(void)
{
- static char __tzbuf[TZ_STRLEN_MAX+1];
- bool std_found=false,
- dst_found=false;
- time_t tnow = time(NULL);
- time_t t;
+ static char __tzbuf[TZ_STRLEN_MAX + 1];
+ bool std_found = false,
+ dst_found = false;
+ time_t tnow = time(NULL);
+ time_t t;
struct tztry tt;
- char cbuf[TZ_STRLEN_MAX+1];
+ char cbuf[TZ_STRLEN_MAX + 1];
/* Initialize OS timezone library */
tzset();
memset(&tt, 0, sizeof(tt));
-
- for (t = tnow; t < tnow+T_YEAR; t += T_MONTH) {
- struct tm *tm = localtime(&t);
- if (tm->tm_isdst == 0 && !std_found) {
+ for (t = tnow; t < tnow + T_YEAR; t += T_MONTH)
+ {
+ struct tm *tm = localtime(&t);
+
+ if (tm->tm_isdst == 0 && !std_found)
+ {
/* Standard time */
memcpy(&tt.std_tm, tm, sizeof(struct tm));
- memset(cbuf,0,sizeof(cbuf));
- strftime(cbuf, sizeof(cbuf)-1, "%Z", tm); /* zone abbr */
+ memset(cbuf, 0, sizeof(cbuf));
+ strftime(cbuf, sizeof(cbuf) - 1, "%Z", tm); /* zone abbr */
strcpy(tt.std_time, TZABBREV(cbuf));
tt.std_ofs = get_timezone_offset(tm);
tt.std_t = t;
std_found = true;
}
- else if (tm->tm_isdst == 1 && !dst_found) {
+ else if (tm->tm_isdst == 1 && !dst_found)
+ {
/* Daylight time */
memcpy(&tt.dst_tm, tm, sizeof(struct tm));
- memset(cbuf,0,sizeof(cbuf));
- strftime(cbuf, sizeof(cbuf)-1, "%Z", tm); /* zone abbr */
+ memset(cbuf, 0, sizeof(cbuf));
+ strftime(cbuf, sizeof(cbuf) - 1, "%Z", tm); /* zone abbr */
strcpy(tt.dst_time, TZABBREV(cbuf));
tt.dst_ofs = get_timezone_offset(tm);
tt.dst_t = t;
dst_found = true;
}
if (std_found && dst_found)
- break; /* Got both standard and daylight */
+ break; /* Got both standard and daylight */
}
- if (!std_found)
+ if (!std_found)
{
/* Failed to determine TZ! */
ereport(LOG,
@@ -189,24 +207,25 @@ identify_system_timezone(void)
return NULL; /* go to GMT */
}
- if (dst_found) {
+ if (dst_found)
+ {
/* Try STD<ofs>DST */
- sprintf(__tzbuf,"%s%d%s",tt.std_time,-tt.std_ofs/3600,tt.dst_time);
+ sprintf(__tzbuf, "%s%d%s", tt.std_time, -tt.std_ofs / 3600, tt.dst_time);
if (try_timezone(__tzbuf, &tt, dst_found))
return __tzbuf;
}
/* Try just the STD timezone */
- strcpy(__tzbuf,tt.std_time);
- if (try_timezone(__tzbuf, &tt, dst_found))
+ strcpy(__tzbuf, tt.std_time);
+ if (try_timezone(__tzbuf, &tt, dst_found))
return __tzbuf;
/* Did not find the timezone. Fallback to try a GMT zone. */
- sprintf(__tzbuf,"Etc/GMT%s%d",
- (-tt.std_ofs<0)?"+":"",tt.std_ofs/3600);
+ sprintf(__tzbuf, "Etc/GMT%s%d",
+ (-tt.std_ofs < 0) ? "+" : "", tt.std_ofs / 3600);
ereport(LOG,
- (errmsg("could not recognize system timezone, defaulting to \"%s\"",
- __tzbuf),
- errhint("You can specify the correct timezone in postgresql.conf.")));
+ (errmsg("could not recognize system timezone, defaulting to \"%s\"",
+ __tzbuf),
+ errhint("You can specify the correct timezone in postgresql.conf.")));
return __tzbuf;
}
@@ -223,7 +242,7 @@ identify_system_timezone(void)
bool
tz_acceptable(void)
{
- struct pg_tm tt;
+ struct pg_tm tt;
time_t time2000;
/*
@@ -255,7 +274,7 @@ tz_acceptable(void)
const char *
select_default_timezone(void)
{
- char *def_tz;
+ char *def_tz;
def_tz = getenv("TZ");
if (def_tz && pg_tzset(def_tz) && tz_acceptable())
@@ -280,9 +299,12 @@ select_default_timezone(void)
* This is called after initial loading of postgresql.conf. If no TimeZone
* setting was found therein, we try to derive one from the environment.
*/
-void pg_timezone_initialize(void) {
+void
+pg_timezone_initialize(void)
+{
/* Do we need to try to figure the timezone? */
- if (strcmp(GetConfigOption("timezone"), "UNKNOWN") == 0) {
+ if (strcmp(GetConfigOption("timezone"), "UNKNOWN") == 0)
+ {
const char *def_tz;
/* Select setting */
generated by cgit v1.2.3 (git 2.39.1) at 2025-07-16 07:11:21 +0000