/*! \file
*
* Multi-timezone Localtime code
- *
- * \author Leap second handling Bradley White (bww@k.gp.cs.cmu.edu).
- * \author POSIX-style TZ environment variable handling from Guy Harris (guy@auspex.com).
*
+ * The original source from this file may be obtained from ftp://elsie.nci.nih.gov/pub/
*/
/*
- * Asterisk defines
- *
- * Don't mess with these unless you're really sure you know what you're doing.
- */
-#ifndef _THREAD_SAFE
-#define _THREAD_SAFE
-#endif
-#define TZ_STRLEN_MAX 255
+** This file is in the public domain, so clarified as of
+** 1996-06-05 by Arthur David Olson.
+*/
+
+/*
+** Leap second handling from Bradley White.
+** POSIX-style TZ environment variable handling from Guy Harris.
+*/
+
/* #define DEBUG */
/*LINTLIBRARY*/
#ifdef DEBUG
#include <stdio.h>
#endif
+#include <float.h>
+
#include "private.h"
#include "tzfile.h"
-
#include "asterisk.h"
ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
#include "asterisk/lock.h"
#include "asterisk/localtime.h"
#include "asterisk/strings.h"
+#include "asterisk/linkedlists.h"
+#include "asterisk/utils.h"
#ifndef lint
#ifndef NOID
-static const char elsieid[] = "@(#)localtime.c 7.57";
+static char __attribute__((unused)) elsieid[] = "@(#)localtime.c 8.5";
#endif /* !defined NOID */
#endif /* !defined lint */
+#ifndef TZ_ABBR_MAX_LEN
+#define TZ_ABBR_MAX_LEN 16
+#endif /* !defined TZ_ABBR_MAX_LEN */
+
+#ifndef TZ_ABBR_CHAR_SET
+#define TZ_ABBR_CHAR_SET \
+ "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789 :+-._"
+#endif /* !defined TZ_ABBR_CHAR_SET */
+#ifndef TZ_ABBR_ERR_CHAR
+#define TZ_ABBR_ERR_CHAR '_'
+#endif /* !defined TZ_ABBR_ERR_CHAR */
/*
** SunOS 4.1.1 headers lack O_BINARY.
#define OPEN_MODE O_RDONLY
#endif /* !defined O_BINARY */
-#ifdef SOLARIS
-#undef TM_ZONE
-#undef TM_GMTOFF
-#endif
+static const char gmt[] = "GMT";
+static const struct timeval WRONG = { 0, 0 };
-#ifdef TM_ZONE
-#ifndef WILDABBR
/*! \note
- * Someone might make incorrect use of a time zone abbreviation:
- * 1. They might reference tzname[0] before calling ast_tzset (explicitly
- * or implicitly).
- * 2. They might reference tzname[1] before calling ast_tzset (explicitly
- * or implicitly).
- * 3. They might reference tzname[1] after setting to a time zone
- * in which Daylight Saving Time is never observed.
- * 4. They might reference tzname[0] after setting to a time zone
- * in which Standard Time is never observed.
- * 5. They might reference tm.TM_ZONE after calling offtime.
- * What's best to do in the above cases is open to debate;
- * for now, we just set things up so that in any of the five cases
- * WILDABBR is used. Another possibility: initialize tzname[0] to the
- * string "tzname[0] used before set", and similarly for the other cases.
- * And another: initialize tzname[0] to "ERA", with an explanation in the
- * manual page of what this "time zone abbreviation" means (doing this so
- * that tzname[0] has the "normal" length of three characters).
+ * The DST rules to use if TZ has no rules and we can't load TZDEFRULES.
+ * We default to US rules as of 1999-08-17.
+ * POSIX 1003.1 section 8.1.1 says that the default DST rules are
+ * implementation dependent; for historical reasons, US rules are a
+ * common default.
*/
-#define WILDABBR " "
-#endif /* !defined WILDABBR */
-
-static char wildabbr[] = "WILDABBR";
-#endif /* TM_ZONE */
-
-/*! \brief FreeBSD defines 'zone' in 'struct tm' as non-const, so don't declare this
- string as const. */
-static char gmt[] = "GMT";
+#ifndef TZDEFRULESTRING
+#define TZDEFRULESTRING ",M4.1.0,M10.5.0"
+#endif /* !defined TZDEFDST */
/*!< \brief time type information */
-struct ttinfo {
- long tt_gmtoff; /*!< GMT offset in seconds */
- int tt_isdst; /*!< used to set tm_isdst */
- int tt_abbrind; /*!< abbreviation list index */
- int tt_ttisstd; /*!< TRUE if transition is std time */
- int tt_ttisgmt; /*!< TRUE if transition is GMT */
+struct ttinfo { /* time type information */
+ long tt_gmtoff; /* UTC offset in seconds */
+ int tt_isdst; /* used to set tm_isdst */
+ int tt_abbrind; /* abbreviation list index */
+ int tt_ttisstd; /* TRUE if transition is std time */
+ int tt_ttisgmt; /* TRUE if transition is UTC */
};
/*! \brief leap second information */
-struct lsinfo {
- time_t ls_trans; /*!< transition time */
- long ls_corr; /*!< correction to apply */
+struct lsinfo { /* leap second information */
+ time_t ls_trans; /* transition time */
+ long ls_corr; /* correction to apply */
};
#define BIGGEST(a, b) (((a) > (b)) ? (a) : (b))
#ifndef TZNAME_MAX
#define MY_TZNAME_MAX 255
#endif /* !defined TZNAME_MAX */
+#ifndef TZ_STRLEN_MAX
+#define TZ_STRLEN_MAX 255
+#endif /* !defined TZ_STRLEN_MAX */
struct state {
- char name[TZ_STRLEN_MAX + 1];
+ /*! Name of the file that this references */
+ char name[TZ_STRLEN_MAX + 1];
int leapcnt;
int timecnt;
int typecnt;
int charcnt;
+ int goback;
+ int goahead;
time_t ats[TZ_MAX_TIMES];
unsigned char types[TZ_MAX_TIMES];
struct ttinfo ttis[TZ_MAX_TYPES];
char chars[BIGGEST(BIGGEST(TZ_MAX_CHARS + 1, sizeof gmt),
(2 * (MY_TZNAME_MAX + 1)))];
struct lsinfo lsis[TZ_MAX_LEAPS];
- struct state *next;
+ AST_LIST_ENTRY(state) list;
};
struct rule {
- int r_type; /*!< type of rule--see below */
- int r_day; /*!< day number of rule */
- int r_week; /*!< week number of rule */
- int r_mon; /*!< month number of rule */
- long r_time; /*!< transition time of rule */
+ int r_type; /* type of rule--see below */
+ int r_day; /* day number of rule */
+ int r_week; /* week number of rule */
+ int r_mon; /* month number of rule */
+ long r_time; /* transition time of rule */
};
-#define JULIAN_DAY 0 /*!< Jn - Julian day */
-#define DAY_OF_YEAR 1 /*!< n - day of year */
-#define MONTH_NTH_DAY_OF_WEEK 2 /*!< Mm.n.d - month, week, day of week */
+#define JULIAN_DAY 0 /* Jn - Julian day */
+#define DAY_OF_YEAR 1 /* n - day of year */
+#define MONTH_NTH_DAY_OF_WEEK 2 /* Mm.n.d - month, week, day of week */
/*
** Prototypes for static functions.
*/
static long detzcode P((const char * codep));
+static time_t detzcode64 P((const char * codep));
+static int differ_by_repeat P((time_t t1, time_t t0));
+static const char * getzname P((const char * strp));
+static const char * getqzname P((const char * strp, const int delim));
static const char * getnum P((const char * strp, int * nump, int min,
int max));
static const char * getsecs P((const char * strp, long * secsp));
static const char * getoffset P((const char * strp, long * offsetp));
static const char * getrule P((const char * strp, struct rule * rulep));
-static void gmtload P((struct state * sp));
-static void gmtsub P((const struct timeval * timep, long offset,
- struct ast_tm * tmp, const char * zone));
-static void localsub P((const struct timeval * timep, long offset,
- struct ast_tm * tmp, const char * zone));
+static int gmtload P((struct state * sp));
+static struct ast_tm * gmtsub P((const struct timeval * timep, long offset,
+ struct ast_tm * tmp));
+static struct ast_tm * localsub P((const struct timeval * timep, long offset,
+ struct ast_tm * tmp, const struct state *sp));
static int increment_overflow P((int * number, int delta));
+static int leaps_thru_end_of P((int y));
+static int long_increment_overflow P((long * number, int delta));
+static int long_normalize_overflow P((long * tensptr,
+ int * unitsptr, const int base));
static int normalize_overflow P((int * tensptr, int * unitsptr,
- int base));
-static time_t time1 P((struct ast_tm * tmp,
- void(*funcp) P((const struct timeval *,
- long, struct ast_tm *, const char *)),
- long offset, const char * zone));
-static time_t time2 P((struct ast_tm *tmp,
- void(*funcp) P((const struct timeval *,
- long, struct ast_tm *, const char *)),
- long offset, int * okayp, const char * zone));
-static void timesub P((const struct timeval * timep, long offset,
- const struct state * sp, struct ast_tm *tmp));
-static int tmcomp P((const struct ast_tm *atmp,
+ const int base));
+static struct timeval time1 P((struct ast_tm * tmp,
+ struct ast_tm * (*funcp) P((const struct timeval *,
+ long, struct ast_tm *, const struct state *sp)),
+ long offset, const struct state *sp));
+static struct timeval time2 P((struct ast_tm *tmp,
+ struct ast_tm * (*funcp) P((const struct timeval *,
+ long, struct ast_tm*, const struct state *sp)),
+ long offset, int * okayp, const struct state *sp));
+static struct timeval time2sub P((struct ast_tm *tmp,
+ struct ast_tm * (*funcp) (const struct timeval *,
+ long, struct ast_tm*, const struct state *sp),
+ long offset, int * okayp, int do_norm_secs, const struct state *sp));
+static struct ast_tm * timesub P((const struct timeval * timep, long offset,
+ const struct state * sp, struct ast_tm * tmp));
+static int tmcomp P((const struct ast_tm * atmp,
const struct ast_tm * btmp));
static time_t transtime P((time_t janfirst, int year,
const struct rule * rulep, long offset));
-static int tzload P((const char * name, struct state * sp));
+static int tzload P((const char * name, struct state * sp,
+ int doextend));
static int tzparse P((const char * name, struct state * sp,
int lastditch));
-static struct state * lclptr = NULL;
-static struct state * last_lclptr = NULL;
-static struct state * gmtptr = NULL;
+static AST_LIST_HEAD_STATIC(zonelist, state);
#ifndef TZ_STRLEN_MAX
#define TZ_STRLEN_MAX 255
#endif /* !defined TZ_STRLEN_MAX */
-static int gmt_is_set;
-#ifdef _THREAD_SAFE
-AST_MUTEX_DEFINE_STATIC(lcl_mutex);
-AST_MUTEX_DEFINE_STATIC(tzset_mutex);
-AST_MUTEX_DEFINE_STATIC(tzsetwall_mutex);
-AST_MUTEX_DEFINE_STATIC(gmt_mutex);
-#endif
-
-/*
+/*! \note
** Section 4.12.3 of X3.159-1989 requires that
** Except for the strftime function, these functions [asctime,
** ctime, gmtime, localtime] return values in one of two static
** objects: a broken-down time structure and an array of char.
-** Thanks to Paul Eggert (eggert@twinsun.com) for noting this.
+** Thanks to Paul Eggert for noting this.
*/
-static long detzcode(const char * const codep)
+static long detzcode(const char * const codep)
{
- register long result;
- register int i;
+ long result;
+ int i;
- result = (codep[0] & 0x80) ? ~0L : 0L;
+ result = (codep[0] & 0x80) ? ~0L : 0;
for (i = 0; i < 4; ++i)
result = (result << 8) | (codep[i] & 0xff);
return result;
}
-static int tzload(register const char *name, register struct state *const sp)
+static time_t detzcode64(const char * const codep)
{
- register const char * p;
- register int i;
- register int fid;
+ time_t result;
+ int i;
+
+ result = (codep[0] & 0x80) ? (~(int_fast64_t) 0) : 0;
+ for (i = 0; i < 8; ++i)
+ result = result * 256 + (codep[i] & 0xff);
+ return result;
+}
+
+static int differ_by_repeat(const time_t t1, const time_t t0)
+{
+ const long long at1 = t1, at0 = t0;
+ if (TYPE_INTEGRAL(time_t) &&
+ TYPE_BIT(time_t) - TYPE_SIGNED(time_t) < SECSPERREPEAT_BITS)
+ return 0;
+ return at1 - at0 == SECSPERREPEAT;
+}
+
+static int tzload(const char *name, struct state * const sp, const int doextend)
+{
+ const char * p;
+ int i;
+ int fid;
+ int stored;
+ int nread;
+ union {
+ struct tzhead tzhead;
+ char buf[2 * sizeof(struct tzhead) +
+ 2 * sizeof *sp +
+ 4 * TZ_MAX_TIMES];
+ } u;
-#ifdef DEBUG
- fprintf(stderr,"tzload called with name=%s, sp=%d\n", name, sp);
-#endif
if (name == NULL && (name = TZDEFAULT) == NULL)
return -1;
{
- register int doaccess;
- struct stat stab;
+ int doaccess;
/*
** Section 4.9.1 of the C standard says that
** "FILENAME_MAX expands to an integral constant expression
** to hold the longest file name string that the implementation
** guarantees can be opened."
*/
- char fullname[FILENAME_MAX + 1] = "";
+ char fullname[FILENAME_MAX + 1];
if (name[0] == ':')
++name;
if (!doaccess) {
if ((p = TZDIR) == NULL)
return -1;
- if ((strlen(p) + 1 + strlen(name) + 1) >= sizeof fullname)
+ if ((strlen(p) + strlen(name) + 1) >= sizeof fullname)
return -1;
- (void) strncpy(fullname, p, sizeof(fullname) - 1);
- (void) strncat(fullname, "/", sizeof(fullname) - strlen(fullname) - 1);
- (void) strncat(fullname, name, sizeof(fullname) - strlen(fullname) - 1);
+ (void) strcpy(fullname, p);
+ (void) strcat(fullname, "/");
+ (void) strcat(fullname, name);
/*
** Set doaccess if '.' (as in "../") shows up in name.
*/
name = fullname;
}
if (doaccess && access(name, R_OK) != 0)
- return -1;
- if ((fid = open(name, OPEN_MODE)) == -1)
return -1;
- if ((fstat(fid, &stab) < 0) || !S_ISREG(stab.st_mode)) {
- close(fid);
+ if ((fid = open(name, OPEN_MODE)) == -1)
return -1;
- }
}
- {
- struct tzhead * tzhp;
- char buf[sizeof *sp + sizeof *tzhp];
+ nread = read(fid, u.buf, sizeof u.buf);
+ if (close(fid) < 0 || nread <= 0)
+ return -1;
+ for (stored = 4; stored <= 8; stored *= 2) {
int ttisstdcnt;
int ttisgmtcnt;
- i = read(fid, buf, sizeof buf);
- if (close(fid) != 0)
- return -1;
- p = buf;
- p += (sizeof tzhp->tzh_magic) + (sizeof tzhp->tzh_reserved);
- ttisstdcnt = (int) detzcode(p);
- p += 4;
- ttisgmtcnt = (int) detzcode(p);
- p += 4;
- sp->leapcnt = (int) detzcode(p);
- p += 4;
- sp->timecnt = (int) detzcode(p);
- p += 4;
- sp->typecnt = (int) detzcode(p);
- p += 4;
- sp->charcnt = (int) detzcode(p);
- p += 4;
+ ttisstdcnt = (int) detzcode(u.tzhead.tzh_ttisstdcnt);
+ ttisgmtcnt = (int) detzcode(u.tzhead.tzh_ttisgmtcnt);
+ sp->leapcnt = (int) detzcode(u.tzhead.tzh_leapcnt);
+ sp->timecnt = (int) detzcode(u.tzhead.tzh_timecnt);
+ sp->typecnt = (int) detzcode(u.tzhead.tzh_typecnt);
+ sp->charcnt = (int) detzcode(u.tzhead.tzh_charcnt);
+ p = u.tzhead.tzh_charcnt + sizeof u.tzhead.tzh_charcnt;
if (sp->leapcnt < 0 || sp->leapcnt > TZ_MAX_LEAPS ||
sp->typecnt <= 0 || sp->typecnt > TZ_MAX_TYPES ||
sp->timecnt < 0 || sp->timecnt > TZ_MAX_TIMES ||
(ttisstdcnt != sp->typecnt && ttisstdcnt != 0) ||
(ttisgmtcnt != sp->typecnt && ttisgmtcnt != 0))
return -1;
- if (i - (p - buf) < sp->timecnt * 4 + /* ats */
+ if (nread - (p - u.buf) <
+ sp->timecnt * stored + /* ats */
sp->timecnt + /* types */
- sp->typecnt * (4 + 2) + /* ttinfos */
+ sp->typecnt * 6 + /* ttinfos */
sp->charcnt + /* chars */
- sp->leapcnt * (4 + 4) + /* lsinfos */
+ sp->leapcnt * (stored + 4) + /* lsinfos */
ttisstdcnt + /* ttisstds */
ttisgmtcnt) /* ttisgmts */
return -1;
for (i = 0; i < sp->timecnt; ++i) {
- sp->ats[i] = detzcode(p);
- p += 4;
+ sp->ats[i] = (stored == 4) ?
+ detzcode(p) : detzcode64(p);
+ p += stored;
}
for (i = 0; i < sp->timecnt; ++i) {
sp->types[i] = (unsigned char) *p++;
return -1;
}
for (i = 0; i < sp->typecnt; ++i) {
- register struct ttinfo * ttisp;
+ struct ttinfo * ttisp;
ttisp = &sp->ttis[i];
ttisp->tt_gmtoff = detzcode(p);
sp->chars[i] = *p++;
sp->chars[i] = '\0'; /* ensure '\0' at end */
for (i = 0; i < sp->leapcnt; ++i) {
- register struct lsinfo * lsisp;
+ struct lsinfo * lsisp;
lsisp = &sp->lsis[i];
- lsisp->ls_trans = detzcode(p);
- p += 4;
+ lsisp->ls_trans = (stored == 4) ?
+ detzcode(p) : detzcode64(p);
+ p += stored;
lsisp->ls_corr = detzcode(p);
p += 4;
}
for (i = 0; i < sp->typecnt; ++i) {
- register struct ttinfo * ttisp;
+ struct ttinfo * ttisp;
ttisp = &sp->ttis[i];
if (ttisstdcnt == 0)
}
}
for (i = 0; i < sp->typecnt; ++i) {
- register struct ttinfo * ttisp;
+ struct ttinfo * ttisp;
ttisp = &sp->ttis[i];
if (ttisgmtcnt == 0)
return -1;
}
}
+ /*
+ ** Out-of-sort ats should mean we're running on a
+ ** signed time_t system but using a data file with
+ ** unsigned values (or vice versa).
+ */
+ for (i = 0; i < sp->timecnt - 2; ++i)
+ if (sp->ats[i] > sp->ats[i + 1]) {
+ ++i;
+ if (TYPE_SIGNED(time_t)) {
+ /*
+ ** Ignore the end (easy).
+ */
+ sp->timecnt = i;
+ } else {
+ /*
+ ** Ignore the beginning (harder).
+ */
+ int j;
+
+ for (j = 0; j + i < sp->timecnt; ++j) {
+ sp->ats[j] = sp->ats[j + i];
+ sp->types[j] = sp->types[j + i];
+ }
+ sp->timecnt = j;
+ }
+ break;
+ }
+ /*
+ ** If this is an old file, we're done.
+ */
+ if (u.tzhead.tzh_version[0] == '\0')
+ break;
+ nread -= p - u.buf;
+ for (i = 0; i < nread; ++i)
+ u.buf[i] = p[i];
+ /*
+ ** If this is a narrow integer time_t system, we're done.
+ */
+ if (stored >= (int) sizeof(time_t) && TYPE_INTEGRAL(time_t))
+ break;
}
+ if (doextend && nread > 2 &&
+ u.buf[0] == '\n' && u.buf[nread - 1] == '\n' &&
+ sp->typecnt + 2 <= TZ_MAX_TYPES) {
+ struct state ts;
+ int result;
+
+ u.buf[nread - 1] = '\0';
+ result = tzparse(&u.buf[1], &ts, FALSE);
+ if (result == 0 && ts.typecnt == 2 &&
+ sp->charcnt + ts.charcnt <= TZ_MAX_CHARS) {
+ for (i = 0; i < 2; ++i)
+ ts.ttis[i].tt_abbrind +=
+ sp->charcnt;
+ for (i = 0; i < ts.charcnt; ++i)
+ sp->chars[sp->charcnt++] =
+ ts.chars[i];
+ i = 0;
+ while (i < ts.timecnt &&
+ ts.ats[i] <=
+ sp->ats[sp->timecnt - 1])
+ ++i;
+ while (i < ts.timecnt &&
+ sp->timecnt < TZ_MAX_TIMES) {
+ sp->ats[sp->timecnt] =
+ ts.ats[i];
+ sp->types[sp->timecnt] =
+ sp->typecnt +
+ ts.types[i];
+ ++sp->timecnt;
+ ++i;
+ }
+ sp->ttis[sp->typecnt++] = ts.ttis[0];
+ sp->ttis[sp->typecnt++] = ts.ttis[1];
+ }
+ }
+ i = 2 * YEARSPERREPEAT;
+ sp->goback = sp->goahead = sp->timecnt > i;
+ sp->goback = sp->goback && sp->types[i] == sp->types[0] &&
+ differ_by_repeat(sp->ats[i], sp->ats[0]);
+ sp->goahead = sp->goahead &&
+ sp->types[sp->timecnt - 1] == sp->types[sp->timecnt - 1 - i] &&
+ differ_by_repeat(sp->ats[sp->timecnt - 1],
+ sp->ats[sp->timecnt - 1 - i]);
return 0;
}
};
/*! \brief
- * Given a pointer into a time zone string, extract a number from that string.
- * \return Check that the number is within a specified range; if it is not, return
- * NULL.
- * Otherwise, return a pointer to the first character not part of the number.
+** Given a pointer into a time zone string, scan until a character that is not
+** a valid character in a zone name is found. Return a pointer to that
+** character.
+*/
+
+static const char * getzname(const char *strp)
+{
+ char c;
+
+ while ((c = *strp) != '\0' && !is_digit(c) && c != ',' && c != '-' &&
+ c != '+')
+ ++strp;
+ return strp;
+}
+
+/*! \brief
+** Given a pointer into an extended time zone string, scan until the ending
+** delimiter of the zone name is located. Return a pointer to the delimiter.
+**
+** As with getzname above, the legal character set is actually quite
+** restricted, with other characters producing undefined results.
+** We don't do any checking here; checking is done later in common-case code.
+*/
+
+static const char * getqzname(const char *strp, const int delim)
+{
+ int c;
+
+ while ((c = *strp) != '\0' && c != delim)
+ ++strp;
+ return strp;
+}
+
+/*! \brief
+** Given a pointer into a time zone string, extract a number from that string.
+** Check that the number is within a specified range; if it is not, return
+** NULL.
+** Otherwise, return a pointer to the first character not part of the number.
*/
-static const char *getnum(register const char *strp, int * const nump, const int min, const int max)
+static const char *getnum(const char *strp, int *nump, const int min, const int max)
{
- register char c;
- register int num;
+ char c;
+ int num;
if (strp == NULL || !is_digit(c = *strp))
return NULL;
}
/*! \brief
- * Given a pointer into a time zone string, extract a number of seconds,
- * in hh[:mm[:ss]] form, from the string.
- * \return If any error occurs, return NULL.
- * Otherwise, return a pointer to the first character not part of the number
- * of seconds.
+** Given a pointer into a time zone string, extract a number of seconds,
+** in hh[:mm[:ss]] form, from the string.
+** If any error occurs, return NULL.
+** Otherwise, return a pointer to the first character not part of the number
+** of seconds.
*/
-static const char *getsecs(register const char *strp, long * const secsp)
+static const char *getsecs(const char *strp, long * const secsp)
{
int num;
*secsp += num * SECSPERMIN;
if (*strp == ':') {
++strp;
- /* `SECSPERMIN' allows for leap seconds. */
+ /* `SECSPERMIN' allows for leap seconds. */
strp = getnum(strp, &num, 0, SECSPERMIN);
if (strp == NULL)
return NULL;
}
/*! \brief
- * Given a pointer into a time zone string, extract an offset, in
- * [+-]hh[:mm[:ss]] form, from the string.
- * \return If any error occurs, return NULL.
- * Otherwise, return a pointer to the first character not part of the time.
+** Given a pointer into a time zone string, extract an offset, in
+** [+-]hh[:mm[:ss]] form, from the string.
+** If any error occurs, return NULL.
+** Otherwise, return a pointer to the first character not part of the time.
*/
-static const char * getoffset(register const char *strp, long * const offsetp)
+static const char *getoffset(const char *strp, long *offsetp)
{
- register int neg = 0;
+ int neg = 0;
if (*strp == '-') {
neg = 1;
}
/*! \brief
- * Given a pointer into a time zone string, extract a rule in the form
- * date[/time]. See POSIX section 8 for the format of "date" and "time".
- * \return If a valid rule is not found, return NULL.
- * Otherwise, return a pointer to the first character not part of the rule.
+** Given a pointer into a time zone string, extract a rule in the form
+** date[/time]. See POSIX section 8 for the format of "date" and "time".
+** If a valid rule is not found, return NULL.
+** Otherwise, return a pointer to the first character not part of the rule.
*/
-static const char *getrule(const char *strp, register struct rule * const rulep)
+static const char *getrule(const char *strp, struct rule *rulep)
{
if (*strp == 'J') {
/*
}
/*! \brief
- * Given the Epoch-relative time of January 1, 00:00:00 GMT, in a year, the
- * year, a rule, and the offset from GMT at the time that rule takes effect,
- * calculate the Epoch-relative time that rule takes effect.
+** Given the Epoch-relative time of January 1, 00:00:00 UTC, in a year, the
+** year, a rule, and the offset from UTC at the time that rule takes effect,
+** calculate the Epoch-relative time that rule takes effect.
*/
-static time_t transtime(janfirst, year, rulep, offset)
-const time_t janfirst;
-const int year;
-register const struct rule * const rulep;
-const long offset;
+static time_t transtime(const time_t janfirst, const int year, const struct rule *rulep, const long offset)
{
- register int leapyear;
- register time_t value = 0;
- register int i;
+ int leapyear;
+ time_t value;
+ int i;
int d, m1, yy0, yy1, yy2, dow;
+ INITIALIZE(value);
leapyear = isleap(year);
switch (rulep->r_type) {
dow += DAYSPERWEEK;
/*
- ** "dow" is the day-of-week of the first day of the month. Get
+ ** "dow" is the day-of-week of the first day of the month. Get
** the day-of-month (zero-origin) of the first "dow" day of the
** month.
*/
}
/*
- ** "value" is the Epoch-relative time of 00:00:00 GMT on the day in
- ** question. To get the Epoch-relative time of the specified local
+ ** "value" is the Epoch-relative time of 00:00:00 UTC on the day in
+ ** question. To get the Epoch-relative time of the specified local
** time on that day, add the transition time and the current offset
- ** from GMT.
+ ** from UTC.
*/
return value + rulep->r_time + offset;
}
-/*
+/*! \note
** Given a POSIX section 8-style TZ string, fill in the rule tables as
** appropriate.
*/
-static int
-tzparse(name, sp, lastditch)
-const char * name;
-register struct state * const sp;
-const int lastditch;
+static int tzparse(const char *name, struct state *sp, const int lastditch)
{
const char * stdname;
- const char * dstname = NULL;
- size_t stdlen = 0;
- size_t dstlen = 0;
- long stdoffset = 0L;
- long dstoffset = 0L;
- register time_t * atp;
- register unsigned char * typep;
- register char * cp;
- register int load_result;
-
+ const char * dstname;
+ size_t stdlen;
+ size_t dstlen;
+ long stdoffset;
+ long dstoffset;
+ time_t * atp;
+ unsigned char * typep;
+ char * cp;
+ int load_result;
+
+ INITIALIZE(dstname);
stdname = name;
-#ifdef DEBUG
- fprintf(stderr, "tzparse(): loading default rules\n");
-#endif
- load_result = tzload(TZDEFRULES, sp);
+ if (lastditch) {
+ stdlen = strlen(name); /* length of standard zone name */
+ name += stdlen;
+ if (stdlen >= sizeof sp->chars)
+ stdlen = (sizeof sp->chars) - 1;
+ stdoffset = 0;
+ } else {
+ if (*name == '<') {
+ name++;
+ stdname = name;
+ name = getqzname(name, '>');
+ if (*name != '>')
+ return -1;
+ stdlen = name - stdname;
+ name++;
+ } else {
+ name = getzname(name);
+ stdlen = name - stdname;
+ }
+ if (*name == '\0')
+ return -1;
+ name = getoffset(name, &stdoffset);
+ if (name == NULL)
+ return -1;
+ }
+ load_result = tzload(TZDEFRULES, sp, FALSE);
if (load_result != 0)
sp->leapcnt = 0; /* so, we're off a little */
if (*name != '\0') {
+ if (*name == '<') {
+ dstname = ++name;
+ name = getqzname(name, '>');
+ if (*name != '>')
+ return -1;
+ dstlen = name - dstname;
+ name++;
+ } else {
+ dstname = name;
+ name = getzname(name);
+ dstlen = name - dstname; /* length of DST zone name */
+ }
if (*name != '\0' && *name != ',' && *name != ';') {
name = getoffset(name, &dstoffset);
if (name == NULL)
return -1;
} else dstoffset = stdoffset - SECSPERHOUR;
+ if (*name == '\0' && load_result != 0)
+ name = TZDEFRULESTRING;
if (*name == ',' || *name == ';') {
struct rule start;
struct rule end;
- register int year;
- register time_t janfirst;
+ int year;
+ time_t janfirst;
time_t starttime;
time_t endtime;
return -1;
sp->typecnt = 2; /* standard time and DST */
/*
- ** Two transitions per year, from EPOCH_YEAR to 2037.
+ ** Two transitions per year, from EPOCH_YEAR forward.
*/
- sp->timecnt = 2 * (2037 - EPOCH_YEAR + 1);
- if (sp->timecnt > TZ_MAX_TIMES)
- return -1;
sp->ttis[0].tt_gmtoff = -dstoffset;
sp->ttis[0].tt_isdst = 1;
sp->ttis[0].tt_abbrind = stdlen + 1;
atp = sp->ats;
typep = sp->types;
janfirst = 0;
- for (year = EPOCH_YEAR; year <= 2037; ++year) {
+ sp->timecnt = 0;
+ for (year = EPOCH_YEAR;
+ sp->timecnt + 2 <= TZ_MAX_TIMES;
+ ++year) {
+ time_t newfirst;
+
starttime = transtime(janfirst, year, &start,
stdoffset);
endtime = transtime(janfirst, year, &end,
*atp++ = endtime;
*typep++ = 1; /* DST ends */
}
- janfirst += year_lengths[isleap(year)] *
+ sp->timecnt += 2;
+ newfirst = janfirst;
+ newfirst += year_lengths[isleap(year)] *
SECSPERDAY;
+ if (newfirst <= janfirst)
+ break;
+ janfirst = newfirst;
}
} else {
- register long theirstdoffset;
- register long theirdstoffset;
- register long theiroffset;
- register int isdst;
- register int i;
- register int j;
+ long theirstdoffset;
+ long theirdstoffset;
+ long theiroffset;
+ int isdst;
+ int i;
+ int j;
if (*name != '\0')
return -1;
- if (load_result != 0)
- return -1;
/*
** Initial values of theirstdoffset and theirdstoffset.
*/
sp->ttis[1].tt_gmtoff = -dstoffset;
sp->ttis[1].tt_isdst = TRUE;
sp->ttis[1].tt_abbrind = stdlen + 1;
+ sp->typecnt = 2;
}
} else {
dstlen = 0;
sp->charcnt = stdlen + 1;
if (dstlen != 0)
sp->charcnt += dstlen + 1;
- if (sp->charcnt > sizeof sp->chars)
+ if ((size_t) sp->charcnt > sizeof sp->chars)
return -1;
cp = sp->chars;
(void) strncpy(cp, stdname, stdlen);
return 0;
}
-static void
-gmtload(sp)
-struct state * const sp;
-{
- if (tzload(gmt, sp) != 0)
- (void) tzparse(gmt, sp, TRUE);
-}
-
-/*
-** A non-static declaration of ast_tzsetwall in a system header file
-** may cause a warning about this upcoming static declaration...
-*/
-static
-#ifdef _THREAD_SAFE
-int
-ast_tzsetwall_basic P((void))
-#else
-int
-ast_tzsetwall P((void))
-#endif
+static int gmtload(struct state *sp)
{
- struct state *cur_state = lclptr;
-
- /* Find the appropriate structure, if already parsed */
- while (cur_state != NULL) {
- if (cur_state->name[0] == '\0')
- break;
- cur_state = cur_state->next;
- }
- if (cur_state != NULL)
- return 0;
- cur_state = malloc(sizeof(struct state));
- if (cur_state == NULL) {
- return -1;
- }
- memset(cur_state,0,sizeof(struct state));
- if (tzload((char *) NULL, cur_state) != 0)
-#ifdef DEBUG
- {
- fprintf(stderr, "ast_tzsetwall: calling gmtload()\n");
-#endif
- gmtload(cur_state);
-#ifdef DEBUG
- }
-#endif
-
- if (last_lclptr)
- last_lclptr->next = cur_state;
+ if (tzload(gmt, sp, TRUE) != 0)
+ return tzparse(gmt, sp, TRUE);
else
- lclptr = cur_state;
- last_lclptr = cur_state;
- return 0;
+ return -1;
}
-#ifdef _THREAD_SAFE
-int
-ast_tzsetwall P((void))
+static const struct state *ast_tzset(const char *zone)
{
- ast_mutex_lock(&tzsetwall_mutex);
- ast_tzsetwall_basic();
- ast_mutex_unlock(&tzsetwall_mutex);
- return 0;
-}
-#endif
+ struct state *sp;
-#ifdef _THREAD_SAFE
-static int
-ast_tzset_basic P((const char *name))
-#else
-int
-ast_tzset P((const char *name))
-#endif
-{
- struct state *cur_state = lclptr;
+ if (ast_strlen_zero(zone))
+ zone = "/etc/localtime";
- /* Not set at all */
- if (name == NULL) {
- return ast_tzsetwall();
- }
-
- /* Find the appropriate structure, if already parsed */
- while (cur_state != NULL) {
- if (!strcmp(cur_state->name,name))
- break;
- cur_state = cur_state->next;
+ AST_LIST_LOCK(&zonelist);
+ AST_LIST_TRAVERSE(&zonelist, sp, list) {
+ if (!strcmp(sp->name, zone)) {
+ AST_LIST_UNLOCK(&zonelist);
+ return sp;
+ }
}
- if (cur_state != NULL)
- return 0;
+ AST_LIST_UNLOCK(&zonelist);
- cur_state = malloc(sizeof(struct state));
- if (cur_state == NULL) {
- return -1;
- }
- memset(cur_state,0,sizeof(*cur_state));
+ if (!(sp = ast_calloc(1, sizeof *sp)))
+ return NULL;
- /* Name is set, but set to the empty string == no adjustments */
- if (name[0] == '\0') {
- /*
- ** User wants it fast rather than right.
- */
- cur_state->leapcnt = 0; /* so, we're off a little */
- cur_state->timecnt = 0;
- cur_state->ttis[0].tt_gmtoff = 0;
- cur_state->ttis[0].tt_abbrind = 0;
- (void) strncpy(cur_state->chars, gmt, sizeof(cur_state->chars) - 1);
- } else if (tzload(name, cur_state) != 0) {
- if (name[0] == ':') {
- (void) gmtload(cur_state);
- } else if (tzparse(name, cur_state, FALSE) != 0) {
- /* If not found, load localtime */
- if (tzload("/etc/localtime", cur_state) != 0)
- /* Last ditch, get GMT */
- (void) gmtload(cur_state);
- }
+ if (tzload(zone, sp, TRUE) != 0) {
+ if (zone[0] == ':' || tzparse(zone, sp, FALSE) != 0)
+ (void) gmtload(sp);
}
- strncpy(cur_state->name, name, sizeof(cur_state->name) - 1);
- if (last_lclptr)
- last_lclptr->next = cur_state;
- else
- lclptr = cur_state;
- last_lclptr = cur_state;
- return 0;
+ ast_copy_string(sp->name, zone, sizeof(sp->name));
+ AST_LIST_LOCK(&zonelist);
+ AST_LIST_INSERT_TAIL(&zonelist, sp, list);
+ AST_LIST_UNLOCK(&zonelist);
+ return sp;
}
-#ifdef _THREAD_SAFE
-void
-ast_tzset P((const char *name))
-{
- ast_mutex_lock(&tzset_mutex);
- ast_tzset_basic(name);
- ast_mutex_unlock(&tzset_mutex);
-}
-#endif
-
-/*
+/*! \note
** The easy way to behave "as if no library function calls" localtime
** is to not call it--so we drop its guts into "localsub", which can be
-** freely called. (And no, the PANS doesn't require the above behavior--
+** freely called. (And no, the PANS doesn't require the above behavior--
** but it *is* desirable.)
**
** The unused offset argument is for the benefit of mktime variants.
*/
-/*ARGSUSED*/
-static void
-localsub(timep, offset, tmp, zone)
-const struct timeval * const timep;
-const long offset;
-struct ast_tm * const tmp;
-const char * const zone;
+static struct ast_tm *localsub(const struct timeval *timep, const long offset, struct ast_tm *tmp, const struct state *sp)
{
- register struct state * sp;
- register const struct ttinfo * ttisp;
- register int i;
+ const struct ttinfo * ttisp;
+ int i;
+ struct ast_tm * result;
struct timeval t;
memcpy(&t, timep, sizeof(t));
- sp = lclptr;
- /* Find the right zone record */
- if (zone == NULL)
- sp = NULL;
- else
- while (sp != NULL) {
- if (!strcmp(sp->name,zone))
- break;
- sp = sp->next;
- }
-
- if (sp == NULL) {
- ast_tzsetwall();
- sp = lclptr;
- /* Find the default zone record */
- while (sp != NULL) {
- if (sp->name[0] == '\0')
- break;
- sp = sp->next;
- }
- }
-
- /* Last ditch effort, use GMT */
- if (sp == NULL) {
- gmtsub(timep, offset, tmp, zone);
- return;
+ if (sp == NULL)
+ return gmtsub(timep, offset, tmp);
+ if ((sp->goback && t.tv_sec < sp->ats[0]) ||
+ (sp->goahead && t.tv_sec > sp->ats[sp->timecnt - 1])) {
+ struct timeval newt = t;
+ time_t seconds;
+ time_t tcycles;
+ int_fast64_t icycles;
+
+ if (t.tv_sec < sp->ats[0])
+ seconds = sp->ats[0] - t.tv_sec;
+ else seconds = t.tv_sec - sp->ats[sp->timecnt - 1];
+ --seconds;
+ tcycles = seconds / YEARSPERREPEAT / AVGSECSPERYEAR;
+ ++tcycles;
+ icycles = tcycles;
+ if (tcycles - icycles >= 1 || icycles - tcycles >= 1)
+ return NULL;
+ seconds = icycles;
+ seconds *= YEARSPERREPEAT;
+ seconds *= AVGSECSPERYEAR;
+ if (t.tv_sec < sp->ats[0])
+ newt.tv_sec += seconds;
+ else newt.tv_sec -= seconds;
+ if (newt.tv_sec < sp->ats[0] ||
+ newt.tv_sec > sp->ats[sp->timecnt - 1])
+ return NULL; /* "cannot happen" */
+ result = localsub(&newt, offset, tmp, sp);
+ if (result == tmp) {
+ time_t newy;
+
+ newy = tmp->tm_year;
+ if (t.tv_sec < sp->ats[0])
+ newy -= icycles * YEARSPERREPEAT;
+ else
+ newy += icycles * YEARSPERREPEAT;
+ tmp->tm_year = newy;
+ if (tmp->tm_year != newy)
+ return NULL;
+ }
+ return result;
}
if (sp->timecnt == 0 || t.tv_sec < sp->ats[0]) {
i = 0;
- while (sp->ttis[i].tt_isdst)
+ while (sp->ttis[i].tt_isdst) {
if (++i >= sp->typecnt) {
i = 0;
break;
}
+ }
} else {
- for (i = 1; i < sp->timecnt; ++i)
- if (t.tv_sec < sp->ats[i])
- break;
- i = sp->types[i - 1];
+ int lo = 1;
+ int hi = sp->timecnt;
+
+ while (lo < hi) {
+ int mid = (lo + hi) >> 1;
+
+ if (t.tv_sec < sp->ats[mid])
+ hi = mid;
+ else
+ lo = mid + 1;
+ }
+ i = (int) sp->types[lo - 1];
}
ttisp = &sp->ttis[i];
/*
** t += ttisp->tt_gmtoff;
** timesub(&t, 0L, sp, tmp);
*/
- timesub(&t, ttisp->tt_gmtoff, sp, tmp);
+ result = timesub(&t, ttisp->tt_gmtoff, sp, tmp);
tmp->tm_isdst = ttisp->tt_isdst;
- tzname[tmp->tm_isdst] = &sp->chars[ttisp->tt_abbrind];
#ifdef TM_ZONE
tmp->TM_ZONE = &sp->chars[ttisp->tt_abbrind];
#endif /* defined TM_ZONE */
tmp->tm_usec = timep->tv_usec;
+ return result;
}
-struct ast_tm *
-ast_localtime(timep, p_tm, zone)
-const struct timeval * const timep;
-struct ast_tm *p_tm;
-const char * const zone;
+struct ast_tm *ast_localtime(const struct timeval *timep, struct ast_tm *tmp, const char *zone)
{
-#ifdef _THREAD_SAFE
- ast_mutex_lock(&lcl_mutex);
-#endif
- ast_tzset(ast_strlen_zero(zone) ? "/etc/localtime" : zone);
- localsub(timep, 0L, p_tm, zone);
-#ifdef _THREAD_SAFE
- ast_mutex_unlock(&lcl_mutex);
-#endif
- return(p_tm);
+ const struct state *sp = ast_tzset(zone);
+ return sp ? localsub(timep, 0L, tmp, sp) : NULL;
}
/*
** gmtsub is to gmtime as localsub is to localtime.
*/
-static void
-gmtsub(timep, offset, tmp, zone)
-const struct timeval * const timep;
-const long offset;
-struct ast_tm * const tmp;
-const char * const zone;
+static struct ast_tm *gmtsub(const struct timeval *timep, const long offset, struct ast_tm *tmp)
{
-#ifdef _THREAD_SAFE
- ast_mutex_lock(&gmt_mutex);
-#endif
- if (!gmt_is_set) {
- gmt_is_set = TRUE;
- gmtptr = (struct state *) malloc(sizeof *gmtptr);
- if (gmtptr != NULL)
- gmtload(gmtptr);
+ struct ast_tm * result;
+ struct state *sp;
+
+ AST_LIST_LOCK(&zonelist);
+ AST_LIST_TRAVERSE(&zonelist, sp, list) {
+ if (!strcmp(sp->name, "UTC"))
+ break;
}
- ast_mutex_unlock(&gmt_mutex);
- timesub(timep, offset, gmtptr, tmp);
+
+ if (!sp) {
+ if (!(sp = (struct state *) ast_calloc(1, sizeof *sp)))
+ return NULL;
+ gmtload(sp);
+ AST_LIST_INSERT_TAIL(&zonelist, sp, list);
+ }
+ AST_LIST_UNLOCK(&zonelist);
+
+ result = timesub(timep, offset, sp, tmp);
#ifdef TM_ZONE
/*
** Could get fancy here and deliver something such as
- ** "GMT+xxxx" or "GMT-xxxx" if offset is non-zero,
+ ** "UTC+xxxx" or "UTC-xxxx" if offset is non-zero,
** but this is no time for a treasure hunt.
*/
if (offset != 0)
- tmp->TM_ZONE = wildabbr;
- else {
- if (gmtptr == NULL)
- tmp->TM_ZONE = gmt;
- else tmp->TM_ZONE = gmtptr->chars;
- }
+ tmp->TM_ZONE = " ";
+ else
+ tmp->TM_ZONE = sp->chars;
#endif /* defined TM_ZONE */
+ return result;
}
-static void
-timesub(timep, offset, sp, tmp)
-const struct timeval * const timep;
-const long offset;
-register const struct state * const sp;
-register struct ast_tm * const tmp;
+/*! \brief
+** Return the number of leap years through the end of the given year
+** where, to make the math easy, the answer for year zero is defined as zero.
+*/
+
+static int leaps_thru_end_of(const int y)
+{
+ return (y >= 0) ? (y / 4 - y / 100 + y / 400) :
+ -(leaps_thru_end_of(-(y + 1)) + 1);
+}
+
+static struct ast_tm *timesub(const struct timeval *timep, const long offset, const struct state *sp, struct ast_tm *tmp)
{
- register const struct lsinfo * lp;
- register long days;
- register long rem;
- register int y;
- register int yleap;
- register const int * ip;
- register long corr;
- register int hit;
- register int i;
+ const struct lsinfo * lp;
+ time_t tdays;
+ int idays; /* unsigned would be so 2003 */
+ long rem;
+ int y;
+ const int * ip;
+ long corr;
+ int hit;
+ int i;
+ long seconds;
+
corr = 0;
hit = 0;
break;
}
}
- days = timep->tv_sec / SECSPERDAY;
- rem = timep->tv_sec % SECSPERDAY;
-#ifdef mc68k
- if (timep->tv_sec == 0x80000000) {
- /*
- ** A 3B1 muffs the division on the most negative number.
- */
- days = -24855;
- rem = -11648;
+ y = EPOCH_YEAR;
+ tdays = timep->tv_sec / SECSPERDAY;
+ rem = timep->tv_sec - tdays * SECSPERDAY;
+ while (tdays < 0 || tdays >= year_lengths[isleap(y)]) {
+ int newy;
+ time_t tdelta;
+ int idelta;
+ int leapdays;
+
+ tdelta = tdays / DAYSPERLYEAR;
+ idelta = tdelta;
+ if (tdelta - idelta >= 1 || idelta - tdelta >= 1)
+ return NULL;
+ if (idelta == 0)
+ idelta = (tdays < 0) ? -1 : 1;
+ newy = y;
+ if (increment_overflow(&newy, idelta))
+ return NULL;
+ leapdays = leaps_thru_end_of(newy - 1) -
+ leaps_thru_end_of(y - 1);
+ tdays -= ((time_t) newy - y) * DAYSPERNYEAR;
+ tdays -= leapdays;
+ y = newy;
}
-#endif /* defined mc68k */
- rem += (offset - corr);
+
+ seconds = tdays * SECSPERDAY + 0.5;
+ tdays = seconds / SECSPERDAY;
+ rem += seconds - tdays * SECSPERDAY;
+
+ /*
+ ** Given the range, we can now fearlessly cast...
+ */
+ idays = tdays;
+ rem += offset - corr;
while (rem < 0) {
rem += SECSPERDAY;
- --days;
+ --idays;
}
while (rem >= SECSPERDAY) {
rem -= SECSPERDAY;
- ++days;
+ ++idays;
+ }
+ while (idays < 0) {
+ if (increment_overflow(&y, -1))
+ return NULL;
+ idays += year_lengths[isleap(y)];
+ }
+ while (idays >= year_lengths[isleap(y)]) {
+ idays -= year_lengths[isleap(y)];
+ if (increment_overflow(&y, 1))
+ return NULL;
}
+ tmp->tm_year = y;
+ if (increment_overflow(&tmp->tm_year, -TM_YEAR_BASE))
+ return NULL;
+ tmp->tm_yday = idays;
+ /*
+ ** The "extra" mods below avoid overflow problems.
+ */
+ tmp->tm_wday = EPOCH_WDAY +
+ ((y - EPOCH_YEAR) % DAYSPERWEEK) *
+ (DAYSPERNYEAR % DAYSPERWEEK) +
+ leaps_thru_end_of(y - 1) -
+ leaps_thru_end_of(EPOCH_YEAR - 1) +
+ idays;
+ tmp->tm_wday %= DAYSPERWEEK;
+ if (tmp->tm_wday < 0)
+ tmp->tm_wday += DAYSPERWEEK;
tmp->tm_hour = (int) (rem / SECSPERHOUR);
- rem = rem % SECSPERHOUR;
+ rem %= SECSPERHOUR;
tmp->tm_min = (int) (rem / SECSPERMIN);
/*
** A positive leap second requires a special
- ** representation. This uses "... ??:59:60" et seq.
+ ** representation. This uses "... ??:59:60" et seq.
*/
tmp->tm_sec = (int) (rem % SECSPERMIN) + hit;
- tmp->tm_wday = (int) ((EPOCH_WDAY + days) % DAYSPERWEEK);
- if (tmp->tm_wday < 0)
- tmp->tm_wday += DAYSPERWEEK;
- y = EPOCH_YEAR;
-#define LEAPS_THRU_END_OF(y) ((y) / 4 - (y) / 100 + (y) / 400)
- while (days < 0 || days >= (long) year_lengths[yleap = isleap(y)]) {
- register int newy;
-
- newy = y + days / DAYSPERNYEAR;
- if (days < 0)
- --newy;
- days -= (newy - y) * DAYSPERNYEAR +
- LEAPS_THRU_END_OF(newy - 1) -
- LEAPS_THRU_END_OF(y - 1);
- y = newy;
- }
- tmp->tm_year = y - TM_YEAR_BASE;
- tmp->tm_yday = (int) days;
- ip = mon_lengths[yleap];
- for (tmp->tm_mon = 0; days >= (long) ip[tmp->tm_mon]; ++(tmp->tm_mon))
- days = days - (long) ip[tmp->tm_mon];
- tmp->tm_mday = (int) (days + 1);
+ ip = mon_lengths[isleap(y)];
+ for (tmp->tm_mon = 0; idays >= ip[tmp->tm_mon]; ++(tmp->tm_mon))
+ idays -= ip[tmp->tm_mon];
+ tmp->tm_mday = (int) (idays + 1);
tmp->tm_isdst = 0;
#ifdef TM_GMTOFF
tmp->TM_GMTOFF = offset;
#endif /* defined TM_GMTOFF */
tmp->tm_usec = timep->tv_usec;
+ return tmp;
}
-char *
-ast_ctime(timep, buf)
-const struct timeval * const timep;
-char *buf;
-{
- struct ast_tm tm;
- return asctime_r((struct tm *)ast_localtime(timep, &tm, NULL), buf);
-}
-
-/*
+/*! \note
** Adapted from code provided by Robert Elz, who writes:
** The "best" way to do mktime I think is based on an idea of Bob
** Kridle's (so its said...) from a long time ago.
-** [kridle@xinet.com as of 1996-01-16.]
-** It does a binary search of the time_t space. Since time_t's are
+** It does a binary search of the time_t space. Since time_t's are
** just 32 bits, its a max of 32 iterations (even at 64 bits it
** would still be very reasonable).
*/
-#ifndef WRONG
-#define WRONG (-1)
-#endif /* !defined WRONG */
-
-/*
-** Simplified normalize logic courtesy Paul Eggert (eggert@twinsun.com).
+/*! \brief
+** Simplified normalize logic courtesy Paul Eggert.
*/
-static int
-increment_overflow(number, delta)
-int * number;
-int delta;
+static int increment_overflow(int *number, int delta)
{
int number0;
return (*number < number0) != (delta < 0);
}
-static int
-normalize_overflow(tensptr, unitsptr, base)
-int * const tensptr;
-int * const unitsptr;
-const int base;
+static int long_increment_overflow(long *number, int delta)
{
- register int tensdelta;
+ long number0;
+
+ number0 = *number;
+ *number += delta;
+ return (*number < number0) != (delta < 0);
+}
+
+static int normalize_overflow(int *tensptr, int *unitsptr, const int base)
+{
+ int tensdelta;
tensdelta = (*unitsptr >= 0) ?
(*unitsptr / base) :
return increment_overflow(tensptr, tensdelta);
}
-static int
-tmcomp(atmp, btmp)
-register const struct ast_tm * const atmp;
-register const struct ast_tm * const btmp;
+static int long_normalize_overflow(long *tensptr, int *unitsptr, const int base)
+{
+ int tensdelta;
+
+ tensdelta = (*unitsptr >= 0) ?
+ (*unitsptr / base) :
+ (-1 - (-1 - *unitsptr) / base);
+ *unitsptr -= tensdelta * base;
+ return long_increment_overflow(tensptr, tensdelta);
+}
+
+static int tmcomp(const struct ast_tm *atmp, const struct ast_tm *btmp)
{
- register int result;
+ int result;
if ((result = (atmp->tm_year - btmp->tm_year)) == 0 &&
(result = (atmp->tm_mon - btmp->tm_mon)) == 0 &&
(result = (atmp->tm_mday - btmp->tm_mday)) == 0 &&
(result = (atmp->tm_hour - btmp->tm_hour)) == 0 &&
- (result = (atmp->tm_min - btmp->tm_min)) == 0)
- result = atmp->tm_sec - btmp->tm_sec;
+ (result = (atmp->tm_min - btmp->tm_min)) == 0 &&
+ (result = (atmp->tm_sec - btmp->tm_sec)) == 0)
+ result = atmp->tm_usec - btmp->tm_usec;
return result;
}
-static time_t
-time2(tmp, funcp, offset, okayp, zone)
-struct ast_tm * const tmp;
-void (* const funcp) P((const struct timeval *, long, struct ast_tm*, const char*));
-const long offset;
-int * const okayp;
-const char * const zone;
+static struct timeval time2sub(struct ast_tm *tmp, struct ast_tm * (* const funcp) (const struct timeval *, long, struct ast_tm *, const struct state *), const long offset, int *okayp, const int do_norm_secs, const struct state *sp)
{
- register const struct state * sp;
- register int dir;
- register int bits;
- register int i, j ;
- register int saved_seconds;
+ int dir;
+ int i, j;
+ int saved_seconds;
+ long li;
+ time_t lo;
+ time_t hi;
+ long y;
struct timeval newt = { 0, 0 };
struct timeval t = { 0, 0 };
struct ast_tm yourtm, mytm;
*okayp = FALSE;
yourtm = *tmp;
+ if (do_norm_secs) {
+ if (normalize_overflow(&yourtm.tm_min, &yourtm.tm_sec,
+ SECSPERMIN))
+ return WRONG;
+ }
if (normalize_overflow(&yourtm.tm_hour, &yourtm.tm_min, MINSPERHOUR))
return WRONG;
if (normalize_overflow(&yourtm.tm_mday, &yourtm.tm_hour, HOURSPERDAY))
return WRONG;
- if (normalize_overflow(&yourtm.tm_year, &yourtm.tm_mon, MONSPERYEAR))
+ y = yourtm.tm_year;
+ if (long_normalize_overflow(&y, &yourtm.tm_mon, MONSPERYEAR))
return WRONG;
/*
- ** Turn yourtm.tm_year into an actual year number for now.
+ ** Turn y into an actual year number for now.
** It is converted back to an offset from TM_YEAR_BASE later.
*/
- if (increment_overflow(&yourtm.tm_year, TM_YEAR_BASE))
+ if (long_increment_overflow(&y, TM_YEAR_BASE))
return WRONG;
while (yourtm.tm_mday <= 0) {
- if (increment_overflow(&yourtm.tm_year, -1))
+ if (long_increment_overflow(&y, -1))
return WRONG;
- i = yourtm.tm_year + (1 < yourtm.tm_mon);
- yourtm.tm_mday += year_lengths[isleap(i)];
+ li = y + (1 < yourtm.tm_mon);
+ yourtm.tm_mday += year_lengths[isleap(li)];
}
while (yourtm.tm_mday > DAYSPERLYEAR) {
- i = yourtm.tm_year + (1 < yourtm.tm_mon);
- yourtm.tm_mday -= year_lengths[isleap(i)];
- if (increment_overflow(&yourtm.tm_year, 1))
+ li = y + (1 < yourtm.tm_mon);
+ yourtm.tm_mday -= year_lengths[isleap(li)];
+ if (long_increment_overflow(&y, 1))
return WRONG;
}
for ( ; ; ) {
- i = mon_lengths[isleap(yourtm.tm_year)][yourtm.tm_mon];
+ i = mon_lengths[isleap(y)][yourtm.tm_mon];
if (yourtm.tm_mday <= i)
break;
yourtm.tm_mday -= i;
if (++yourtm.tm_mon >= MONSPERYEAR) {
yourtm.tm_mon = 0;
- if (increment_overflow(&yourtm.tm_year, 1))
+ if (long_increment_overflow(&y, 1))
return WRONG;
}
}
- if (increment_overflow(&yourtm.tm_year, -TM_YEAR_BASE))
+ if (long_increment_overflow(&y, -TM_YEAR_BASE))
+ return WRONG;
+ yourtm.tm_year = y;
+ if (yourtm.tm_year != y)
return WRONG;
- if (yourtm.tm_year + TM_YEAR_BASE < EPOCH_YEAR) {
+ if (yourtm.tm_sec >= 0 && yourtm.tm_sec < SECSPERMIN)
+ saved_seconds = 0;
+ else if (y + TM_YEAR_BASE < EPOCH_YEAR) {
/*
** We can't set tm_sec to 0, because that might push the
** time below the minimum representable time.
yourtm.tm_sec = 0;
}
/*
- ** Divide the search space in half
- ** (this works whether time_t is signed or unsigned).
- */
- bits = TYPE_BIT(time_t) - 1;
- /*
- ** If time_t is signed, then 0 is just above the median,
- ** assuming two's complement arithmetic.
- ** If time_t is unsigned, then (1 << bits) is just above the median.
+ ** Do a binary search (this works whatever time_t's type is).
*/
- t.tv_sec = 0;
+ if (!TYPE_SIGNED(time_t)) {
+ lo = 0;
+ hi = lo - 1;
+ } else if (!TYPE_INTEGRAL(time_t)) {
+ if (sizeof(time_t) > sizeof(float))
+ hi = (time_t) DBL_MAX;
+ else hi = (time_t) FLT_MAX;
+ lo = -hi;
+ } else {
+ lo = 1;
+ for (i = 0; i < (int) TYPE_BIT(time_t) - 1; ++i)
+ lo *= 2;
+ hi = -(lo + 1);
+ }
for ( ; ; ) {
- (*funcp)(&t, offset, &mytm, zone);
- dir = tmcomp(&mytm, &yourtm);
+ t.tv_sec = lo / 2 + hi / 2;
+ if (t.tv_sec < lo)
+ t.tv_sec = lo;
+ else if (t.tv_sec > hi)
+ t.tv_sec = hi;
+ if ((*funcp)(&t, offset, &mytm, sp) == NULL) {
+ /*
+ ** Assume that t is too extreme to be represented in
+ ** a struct ast_tm; arrange things so that it is less
+ ** extreme on the next pass.
+ */
+ dir = (t.tv_sec > 0) ? 1 : -1;
+ } else dir = tmcomp(&mytm, &yourtm);
if (dir != 0) {
- if (bits-- < 0)
+ if (t.tv_sec == lo) {
+ ++t.tv_sec;
+ if (t.tv_sec <= lo)
+ return WRONG;
+ ++lo;
+ } else if (t.tv_sec == hi) {
+ --t.tv_sec;
+ if (t.tv_sec >= hi)
+ return WRONG;
+ --hi;
+ }
+ if (lo > hi)
return WRONG;
- if (bits < 0)
- --t.tv_sec; /* may be needed if new t is minimal */
- else if (dir > 0)
- t.tv_sec -= ((time_t) 1) << bits;
- else t.tv_sec += ((time_t) 1) << bits;
+ if (dir > 0)
+ hi = t.tv_sec;
+ else lo = t.tv_sec;
continue;
}
if (yourtm.tm_isdst < 0 || mytm.tm_isdst == yourtm.tm_isdst)
/*
** The (void *) casts are the benefit of SunOS 3.3 on Sun 2's.
*/
- sp = (const struct state *)
- (((void *) funcp == (void *) localsub) ?
- lclptr : gmtptr);
- if (sp == NULL)
- return WRONG;
for (i = sp->typecnt - 1; i >= 0; --i) {
if (sp->ttis[i].tt_isdst != yourtm.tm_isdst)
continue;
continue;
newt.tv_sec = t.tv_sec + sp->ttis[j].tt_gmtoff -
sp->ttis[i].tt_gmtoff;
- (*funcp)(&newt, offset, &mytm, zone);
+ if ((*funcp)(&newt, offset, &mytm, sp) == NULL)
+ continue;
if (tmcomp(&mytm, &yourtm) != 0)
continue;
if (mytm.tm_isdst != yourtm.tm_isdst)
if ((newt.tv_sec < t.tv_sec) != (saved_seconds < 0))
return WRONG;
t.tv_sec = newt.tv_sec;
- (*funcp)(&t, offset, tmp, zone);
- *okayp = TRUE;
- return t.tv_sec;
+ if ((*funcp)(&t, offset, tmp, sp))
+ *okayp = TRUE;
+ return t;
}
-static time_t
-time1(tmp, funcp, offset, zone)
-struct ast_tm * const tmp;
-void (* const funcp) P((const struct timeval *, long, struct ast_tm *, const char*));
-const long offset;
-const char * const zone;
+static struct timeval time2(struct ast_tm *tmp, struct ast_tm * (* const funcp) (const struct timeval *, long, struct ast_tm*, const struct state *sp), const long offset, int *okayp, const struct state *sp)
{
- register time_t t;
- register const struct state * sp;
- register int samei, otheri;
+ struct timeval t;
+
+ /*! \note
+ ** First try without normalization of seconds
+ ** (in case tm_sec contains a value associated with a leap second).
+ ** If that fails, try with normalization of seconds.
+ */
+ t = time2sub(tmp, funcp, offset, okayp, FALSE, sp);
+ return *okayp ? t : time2sub(tmp, funcp, offset, okayp, TRUE, sp);
+}
+
+static struct timeval time1(struct ast_tm *tmp, struct ast_tm * (* const funcp) (const struct timeval *, long, struct ast_tm *, const struct state *), const long offset, const struct state *sp)
+{
+ struct timeval t;
+ int samei, otheri;
+ int sameind, otherind;
+ int i;
+ int nseen;
+ int seen[TZ_MAX_TYPES];
+ int types[TZ_MAX_TYPES];
int okay;
if (tmp->tm_isdst > 1)
tmp->tm_isdst = 1;
- t = time2(tmp, funcp, offset, &okay, zone);
+ t = time2(tmp, funcp, offset, &okay, sp);
#ifdef PCTS
/*
- ** PCTS code courtesy Grant Sullivan (grant@osf.org).
+ ** PCTS code courtesy Grant Sullivan.
*/
if (okay)
return t;
#endif /* !defined PCTS */
/*
** We're supposed to assume that somebody took a time of one type
- ** and did some math on it that yielded a "struct tm" that's bad.
+ ** and did some math on it that yielded a "struct ast_tm" that's bad.
** We try to divine the type they started from and adjust to the
** type they need.
*/
- /*
- ** The (void *) casts are the benefit of SunOS 3.3 on Sun 2's.
- */
- sp = (const struct state *) (((void *) funcp == (void *) localsub) ?
- lclptr : gmtptr);
if (sp == NULL)
return WRONG;
- for (samei = sp->typecnt - 1; samei >= 0; --samei) {
+ for (i = 0; i < sp->typecnt; ++i)
+ seen[i] = FALSE;
+ nseen = 0;
+ for (i = sp->timecnt - 1; i >= 0; --i)
+ if (!seen[sp->types[i]]) {
+ seen[sp->types[i]] = TRUE;
+ types[nseen++] = sp->types[i];
+ }
+ for (sameind = 0; sameind < nseen; ++sameind) {
+ samei = types[sameind];
if (sp->ttis[samei].tt_isdst != tmp->tm_isdst)
continue;
- for (otheri = sp->typecnt - 1; otheri >= 0; --otheri) {
+ for (otherind = 0; otherind < nseen; ++otherind) {
+ otheri = types[otherind];
if (sp->ttis[otheri].tt_isdst == tmp->tm_isdst)
continue;
tmp->tm_sec += sp->ttis[otheri].tt_gmtoff -
sp->ttis[samei].tt_gmtoff;
tmp->tm_isdst = !tmp->tm_isdst;
- t = time2(tmp, funcp, offset, &okay, zone);
+ t = time2(tmp, funcp, offset, &okay, sp);
if (okay)
return t;
tmp->tm_sec -= sp->ttis[otheri].tt_gmtoff -
return WRONG;
}
-time_t
-ast_mktime(tmp,zone)
-struct ast_tm * const tmp;
-const char * const zone;
+struct timeval ast_mktime(struct ast_tm *tmp, const char *zone)
{
- time_t mktime_return_value;
-#ifdef _THREAD_SAFE
- ast_mutex_lock(&lcl_mutex);
-#endif
- ast_tzset(!ast_strlen_zero(zone) ? zone : "/etc/localtime");
- mktime_return_value = time1(tmp, localsub, 0L, !ast_strlen_zero(zone) ? zone : "/etc/localtime");
-#ifdef _THREAD_SAFE
- ast_mutex_unlock(&lcl_mutex);
-#endif
- return(mktime_return_value);
+ const struct state *sp;
+ if (!(sp = ast_tzset(zone)))
+ return WRONG;
+ return time1(tmp, localsub, 0L, sp);
}
int ast_strftime(char *buf, size_t len, const char *tmp, const struct ast_tm *tm)
projects / asterisk/asterisk.git / commitdiff