-/* Copyright (C) 1991, 92, 93, 95, 96, 97 Free Software Foundation, Inc.
+/* Copyright (C) 1991, 92, 93, 95, 96, 97, 98 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
#include <unistd.h>
#define NOID
-#include <tzfile.h>
+#include <timezone/tzfile.h>
int __use_tzfile = 0;
long int change; /* Seconds of correction to apply. */
};
-static struct ttinfo *find_transition (time_t timer);
-static void compute_tzname_max (size_t);
+extern char * __tzstring (const char *); /* Defined in tzset.c. */
+
+static struct ttinfo *find_transition (time_t timer) internal_function;
+static void compute_tzname_max (size_t) internal_function;
static size_t num_transitions;
static time_t *transitions = NULL;
static size_t num_types;
static struct ttinfo *types = NULL;
static char *zone_names = NULL;
+static long int rule_stdoff;
+static long int rule_dstoff;
static size_t num_leaps;
static struct leap *leaps = NULL;
#include <endian.h>
+#include <byteswap.h>
/* Decode the four bytes at PTR as a signed integer in network byte order. */
static inline int
{
if ((BYTE_ORDER == BIG_ENDIAN) && sizeof (int) == 4)
return *(const int *) ptr;
+ else if (BYTE_ORDER == LITTLE_ENDIAN && sizeof (int) == 4)
+ return bswap_32 (*(const int *) ptr);
else
{
const unsigned char *p = ptr;
struct tzhead tzhead;
size_t chars;
register size_t i;
- struct ttinfo *info;
__use_tzfile = 0;
/* No user specification; use the site-wide default. */
file = TZDEFAULT;
else if (*file == '\0')
- /* User specified the empty string; use UTC explicitly. */
- file = "Universal";
+ /* User specified the empty string; use UTC with no leap seconds. */
+ return;
else
{
/* We must not allow to read an arbitrary file in a setuid
{
const char *tzdir;
unsigned int len, tzdir_len;
- char *new;
+ char *new, *tmp;
tzdir = __secure_getenv ("TZDIR");
if (tzdir == NULL || *tzdir == '\0')
tzdir_len = strlen (tzdir);
len = strlen (file) + 1;
new = (char *) __alloca (tzdir_len + 1 + len);
- memcpy (new, tzdir, tzdir_len);
- new[tzdir_len] = '/';
- memcpy (&new[tzdir_len + 1], file, len);
+ tmp = __mempcpy (new, tzdir, tzdir_len);
+ *tmp++ = '/';
+ __mempcpy (tmp, file, len);
file = new;
}
if (f == NULL)
return;
- if (fread ((void *) &tzhead, sizeof (tzhead), 1, f) != 1)
+ if (fread_unlocked ((void *) &tzhead, sizeof (tzhead), 1, f) != 1)
goto lose;
num_transitions = (size_t) decode (tzhead.tzh_timecnt);
if (sizeof (time_t) < 4)
abort ();
- if (fread(transitions, 4, num_transitions, f) != num_transitions ||
- fread(type_idxs, 1, num_transitions, f) != num_transitions)
+ if (fread_unlocked (transitions, 4, num_transitions, f) != num_transitions
+ || fread_unlocked (type_idxs, 1, num_transitions, f) != num_transitions)
goto lose;
/* Check for bogus indices in the data file, so we can hereafter
for (i = 0; i < num_types; ++i)
{
unsigned char x[4];
- if (fread (x, 1, 4, f) != 4 ||
- fread (&types[i].isdst, 1, 1, f) != 1 ||
- fread (&types[i].idx, 1, 1, f) != 1)
+ if (fread_unlocked (x, 1, 4, f) != 4
+ || fread_unlocked (&types[i].isdst, 1, 1, f) != 1
+ || fread_unlocked (&types[i].idx, 1, 1, f) != 1)
goto lose;
if (types[i].idx >= chars) /* Bogus index in data file. */
goto lose;
types[i].offset = (long int) decode (x);
}
- if (fread (zone_names, 1, chars, f) != chars)
+ if (fread_unlocked (zone_names, 1, chars, f) != chars)
goto lose;
for (i = 0; i < num_leaps; ++i)
{
unsigned char x[4];
- if (fread (x, 1, sizeof (x), f) != sizeof (x))
+ if (fread_unlocked (x, 1, sizeof (x), f) != sizeof (x))
goto lose;
leaps[i].transition = (time_t) decode (x);
- if (fread (x, 1, sizeof (x), f) != sizeof (x))
+ if (fread_unlocked (x, 1, sizeof (x), f) != sizeof (x))
goto lose;
leaps[i].change = (long int) decode (x);
}
for (i = 0; i < num_isstd; ++i)
{
- int c = getc (f);
+ int c = getc_unlocked (f);
if (c == EOF)
goto lose;
types[i].isstd = c != 0;
for (i = 0; i < num_isgmt; ++i)
{
- int c = getc (f);
+ int c = getc_unlocked (f);
if (c == EOF)
goto lose;
types[i].isgmt = c != 0;
fclose (f);
- info = find_transition (0);
- for (i = 0; i < num_types && i < sizeof (__tzname) / sizeof (__tzname[0]);
- ++i)
- __tzname[types[i].isdst] = &zone_names[types[i].idx];
- if (info->isdst < sizeof (__tzname) / sizeof (__tzname[0]))
- __tzname[info->isdst] = &zone_names[info->idx];
+ /* Find the standard and daylight time offsets used by the rule file.
+ We choose the offsets in the types of each flavor that are
+ transitioned to earliest in time. */
+ __tzname[1] = NULL;
+ for (i = 0; i < num_types; ++i)
+ __tzname[types[i].isdst] = __tzstring (&zone_names[types[i].idx]);
+ if (__tzname[1] == NULL)
+ __tzname[1] = __tzname[0];
compute_tzname_max (chars);
+ if (num_transitions == 0)
+ /* Use the first rule (which should also be the only one. */
+ rule_stdoff = rule_dstoff = types[0].offset;
+ else
+ {
+ rule_stdoff = rule_dstoff = 0;
+ for (i = 0; i < num_transitions; ++i)
+ {
+ if (!rule_stdoff && !types[type_idxs[i]].isdst)
+ rule_stdoff = types[type_idxs[i]].offset;
+ if (!rule_dstoff && types[type_idxs[i]].isdst)
+ rule_dstoff = types[type_idxs[i]].offset;
+ if (rule_stdoff && rule_dstoff)
+ break;
+ }
+ }
+
+ __daylight = rule_stdoff != rule_dstoff;
+ __timezone = -rule_stdoff;
+
__use_tzfile = 1;
return;
- lose:;
- fclose(f);
+ lose:
+ fclose (f);
}
\f
/* The user specified a hand-made timezone, but not its DST rules.
from the TZDEFRULES file. */
void
-__tzfile_default (char *std, char *dst, long int stdoff, long int dstoff)
+__tzfile_default (const char *std, const char *dst,
+ long int stdoff, long int dstoff)
{
size_t stdlen, dstlen, i;
- long int rule_offset, rule_stdoff, rule_dstoff;
int isdst;
__tzfile_read (TZDEFRULES);
__use_tzfile = 0;
return;
}
- memcpy (zone_names, std, stdlen);
- memcpy (&zone_names[stdlen], dst, dstlen);
-
- /* Find the standard and daylight time offsets used by the rule file.
- We choose the offsets in the types of each flavor that are
- transitioned to earliest in time. */
- rule_stdoff = rule_dstoff = 0;
- for (i = 0; i < num_transitions; ++i)
- {
- if (!rule_stdoff && !types[type_idxs[i]].isdst)
- rule_stdoff = types[type_idxs[i]].offset;
- if (!rule_dstoff && types[type_idxs[i]].isdst)
- rule_dstoff = types[type_idxs[i]].offset;
- if (rule_stdoff && rule_dstoff)
- break;
- }
+ __mempcpy (__mempcpy (zone_names, std, stdlen), dst, dstlen);
/* Now correct the transition times for the user-specified standard and
daylight offsets from GMT. */
isdst = 0;
- rule_offset = rule_offset;
for (i = 0; i < num_transitions; ++i)
{
struct ttinfo *trans_type = &types[type_idxs[i]];
types[1].isdst = 1;
/* Reset the zone names to point to the user's names. */
- __tzname[0] = &zone_names[0];
- __tzname[1] = &zone_names[stdlen];
+ __tzname[0] = (char *) std;
+ __tzname[1] = (char *) dst;
+
+ /* Set the timezone. */
+ __timezone = -types[0].offset;
compute_tzname_max (stdlen + dstlen);
}
\f
static struct ttinfo *
+internal_function
find_transition (time_t timer)
{
size_t i;
}
\f
int
-__tzfile_compute (time_t timer, long int *leap_correct, int *leap_hit)
+__tzfile_compute (time_t timer, int use_localtime,
+ long int *leap_correct, int *leap_hit,
+ struct tm *tp)
{
- struct ttinfo *info;
register size_t i;
- info = find_transition (timer);
- __daylight = info->isdst;
- __timezone = info->offset;
- for (i = 0; i < num_types && i < sizeof (__tzname) / sizeof (__tzname[0]);
- ++i)
- __tzname[types[i].isdst] = &zone_names[types[i].idx];
- if (info->isdst < sizeof (__tzname) / sizeof (__tzname[0]))
- __tzname[info->isdst] = &zone_names[info->idx];
+ if (use_localtime)
+ {
+ struct ttinfo *info = find_transition (timer);
+ __daylight = rule_stdoff != rule_dstoff;
+ __timezone = -rule_stdoff;
+ __tzname[1] = NULL;
+ for (i = 0; i < num_types; ++i)
+ __tzname[types[i].isdst] = __tzstring (&zone_names[types[i].idx]);
+ if (__tzname[1] == NULL)
+ /* There is no daylight saving time. */
+ __tzname[1] = __tzname[0];
+ tp->tm_isdst = info->isdst;
+ tp->tm_zone = &zone_names[info->idx];
+ tp->tm_gmtoff = info->offset;
+ }
*leap_correct = 0L;
*leap_hit = 0;
leaps[i].change > leaps[i - 1].change))
{
*leap_hit = 1;
- while (i > 0 &&
- leaps[i].transition == leaps[i - 1].transition + 1 &&
- leaps[i].change == leaps[i - 1].change + 1)
+ while (i > 0
+ && leaps[i].transition == leaps[i - 1].transition + 1
+ && leaps[i].change == leaps[i - 1].change + 1)
{
++*leap_hit;
--i;
return 1;
}
\f
-void
+static void
+internal_function
compute_tzname_max (size_t chars)
{
- extern size_t __tzname_cur_max; /* Defined in __tzset.c. */
+ extern size_t __tzname_cur_max; /* Defined in tzset.c. */
const char *p;
++p;
if ((size_t) (p - start) > __tzname_cur_max)
__tzname_cur_max = p - start;
- } while (++p < &zone_names[chars]);
+ }
+ while (++p < &zone_names[chars]);
}
projects / platform / upstream / glibc.git / blobdiff