TzTransitionList parseTimeZone(const char* tzName)
{
static const char* zoneInfoDir = "/usr/share/zoneinfo/";
static const char* etcZoneInfoDir = "/usr/share/zoneinfo/Etc/";
std::string filePath = zoneInfoDir;
filePath += tzName;
struct stat stBuf;
FILE* fp = fopen(filePath.c_str(), "r");
if (!fp && errno == ENOENT)
{
// if file not found - try alternative filePath
printf("Failed to find file: %s\n", filePath.c_str());
filePath = etcZoneInfoDir;
filePath += tzName;
fp = fopen(filePath.c_str(), "r");
if (!fp && errno == ENOENT)
{
printf("Failed to find second try file: %s\n", filePath.c_str());
return TzTransitionList();
}
}
if (fp)
{
if (fstat(fileno(fp), &stBuf) != 0)
{
printf("Failed to stat opened file: %s\n", filePath.c_str());
fclose(fp);
return TzTransitionList();
}
if (stBuf.st_size <= (int) sizeof(tzhead)) {
printf("file too short to be a tz file: %s\n", filePath.c_str());
fclose(fp);
return TzTransitionList();
}
}
else
{
printf("Failed to open file: %s\n", filePath.c_str());
return TzTransitionList();
}
char* buf = (char*) malloc(stBuf.st_size);
size_t size = fread(buf, 1, stBuf.st_size, fp);
fclose(fp);
if (size != (size_t) stBuf.st_size) {
printf("Short read on file: %s\n", filePath.c_str());
free(buf);
return TzTransitionList();
}
ttentrylist ttEntryList;
ttinfolist ttInfoList;
std::vector<char> ttAbbrList;
/*
The time zone information files used by tzset(3) begin with the
magic characters "TZif" to identify then as time zone information
files, followed by sixteen bytes reserved for future use,
followed by six four-byte values of type long, written in a "standard"
byte order (the high-order byte of the value is written first).
These values are, in order:
tzh_ttisgmtcnt
The number of UTC/local indicators stored in the file.
tzh_ttisstdcnt
The number of standard/wall indicators stored in the file.
tzh_leapcnt
The number of leap seconds for which data is stored in the file.
tzh_timecnt
The number of "transition times" for which data is stored in the file.
tzh_typecnt
The number of "local time types" for which data is stored in the file (must not be zero).
tzh_charcnt
The number of characters of "time zone abbreviation strings" stored in the file.
*/
long isGmt = 0;
long isStd = 0;
long leapCnt = 0;
long timeCnt = 0;
long typeCnt = 0;
long charCnt = 0;
(void) isGmt;
(void) isStd;
(void) leapCnt;
(void) timeCnt;
(void) typeCnt;
(void) charCnt;
int index = 0;
for (int stored = 4; stored <= 8; stored *= 2) {
DBG("-----------------------------------------------------\n");
if (memcmp(buf, TZ_MAGIC, 4) != 0) {
printf("Not a tz file. Header signature mismatch: %s\n", filePath.c_str());
free(buf);
return TzTransitionList();
}
struct tzhead* head = (struct tzhead*) (buf + index);
isGmt = detzcode(head->tzh_ttisgmtcnt);
isStd = detzcode(head->tzh_ttisstdcnt);
leapCnt = detzcode(head->tzh_leapcnt);
timeCnt = detzcode(head->tzh_timecnt);
typeCnt = detzcode(head->tzh_typecnt);
charCnt = detzcode(head->tzh_charcnt);
ttInfoList.clear();
ttInfoList.reserve(timeCnt);
ttEntryList.clear();
ttEntryList.reserve(typeCnt);
ttAbbrList.clear();
ttAbbrList.reserve(charCnt + 1);
index += sizeof(struct tzhead);
DBG("tzh_ttisgmtcnt: %ld\n", isGmt);
DBG("tzh_ttisstdcnt: %ld\n", isStd);
DBG("tzh_leapcnt: %ld\n", leapCnt);
DBG("tzh_timecnt: %ld\n", timeCnt);
DBG("tzh_typecnt: %ld\n", typeCnt);
DBG("tzh_charcnt: %ld\n", charCnt);
/* The above header is followed by tzh_timecnt four-byte values of type
long, sorted in ascending order. These values are written in "standard"
byte order. Each is used as a transition time (as returned by
time(2)) at which the rules for computing local time change. */
for (long i = 0; i < timeCnt; i++) {
time_t time;
time = (stored == 4) ? detzcode(buf + index) : detzcode64(buf + index);
index += stored;
ttentry e;
e.time = time;
ttEntryList.push_back(e);
DBG("tzh_timecnt: Time: %ld, %s", time, asctime(gmtime(&time)));
}
/* Next come tzh_timecnt one-byte values of type unsigned char;
each one tells which of the different types of "local time"
types described in the file is associated with the same-indexed
transition time. */
for (long i = 0; i < timeCnt; i++) {
unsigned char indexToLocalTime = (unsigned char) buf[index];
index++;
ttEntryList[i].indexToLocalTime = indexToLocalTime;
DBG("tzh_timecnt: Index: %d\n", indexToLocalTime);
}
/* These values serve as indices into an array of
ttinfo structures that appears next in the file; these structures are
defined as follows:
struct ttinfo {
long tt_gmtoff;
int tt_isdst;
unsigned int tt_abbrind;
};
Each structure is written as a four-byte value for tt_gmtoff of type
long, in a standard byte order, followed by a one-byte value
for tt_isdst and a one-byte value for tt_abbrind. In each structure,
tt_gmtoff gives the number of seconds to be added to UTC,
tt_isdst tells whether tm_isdst should be set by localtime(3),
and tt_abbrind serves as an index into the array of time zone
abbreviation characters that follow the ttinfo structure(s) in the file. */
for (long i = 0; i < typeCnt; i++) {
ttinfo ttInfo;
ttInfo.gmtOffset = detzcode(buf + index);
index += 4;
ttInfo.isDst = (unsigned char) buf[index];
index++;
ttInfo.abbrIndex = (unsigned char) buf[index];
index++;
ttInfoList.push_back(ttInfo);
DBG("gmtOff: %ld, isDst: %d, abbrind: %d\n",
ttInfo.gmtOffset, ttInfo.isDst, ttInfo.abbrIndex);
}
DBG("abbrev: ");
for (long i = 0; i < charCnt; i++) {
DBG("%c", buf[index]);
ttAbbrList.push_back(buf[index]);
index++;
}
ttAbbrList.push_back(0);
DBG("\n");
/* Then there are tzh_leapcnt pairs of four-byte values,
written in standard byte order; the first value of each
pair gives the time (as returned by time(2)) at which a leap
second occurs; the second gives the total number of leap seconds
to be applied after the given time. The pairs of values are
sorted in ascending order by time. */
for (long i = 0; i < leapCnt; i++) {
long leapTime = (stored == 4) ? detzcode(buf + index)
: detzcode64(buf + index);
index += stored;
long leapSeconds = detzcode(buf + index);
index += 4;
(void) leapTime;
(void) leapSeconds;
DBG("leapTime: %ld, leapSeconds: %ld\n",
leapTime, leapSeconds);
}
/*
Then there are tzh_ttisstdcnt standard/wall indicators, each
stored as a one-byte value; they tell whether the transition
times associated with local time types were specified as standard
time or wall clock time, and are used when a time zone file is
used in handling POSIX-style time zone environment variables.
*/
for (long i = 0; i < typeCnt; i++) {
int standardOrWallClock = (unsigned char) buf[index];
index++;
(void) standardOrWallClock;
DBG("standardOrWallClock: %d\n", standardOrWallClock);
}
/*
Finally, there are tzh_ttisgmtcnt UTC/local indicators,
each stored as a one-byte value; they tell whether the
transition times associated with local time types were
specified as UTC or local time, and are used when a time zone
file is used in handling POSIX-style time zone environment variables.
*/
for (long i = 0; i < typeCnt; i++) {
int utcOrLocalTime = (unsigned char) buf[index];
index++;
(void) utcOrLocalTime;
DBG("utcOrLocalTime: %d\n", utcOrLocalTime);
}
/*
Localtime uses the first standard-time ttinfo structure in the file
(or simply the first ttinfo structure in the absence of a
standard-time structure) if either tzh_timecnt is zero or the time
argument is less than the first transition time recorded in the
file.
*/
/*
* 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 (int i = 0; i < timeCnt - 2; ++i) {
if (ttEntryList[i].time > ttEntryList[i+1].time) {
++i;
if (TYPE_SIGNED(time_t)) {
// Ignore the end (easy).
timeCnt = i;
} else {
// Ignore the beginning (harder).
int j;
for (j = 0; (j + i) < timeCnt; ++j) {
ttEntryList[j] = ttEntryList[j+i];
}
timeCnt = j;
}
break;
}
}
/*
* If this is an old file, we're done.
*/
if (head->tzh_version[0] == '\0') {
DBG("Version 0 file. breaking\n");
break;
}
/*
* If this is a narrow integer time_t system, we're done.
*/
if ((stored >= (int) sizeof(time_t)) && (TYPE_INTEGRAL(time_t))) {
DBG("narrow integer time_t system. breaking\n");
break;
}
}
DBG("Total Buffer size parsed: %d\n", index);
free(buf);
// Dummy entry for standardized timezones which never had
// a transition time
if (ttEntryList.empty() && !ttInfoList.empty()) {
ttentry e;
timeCnt = 1;
e.time = -2147483648UL;
e.indexToLocalTime = 0;
ttEntryList.push_back(e);
}
TzTransitionList result;
for (int i = 0; i < timeCnt; i++) {
const ttentry& entry = ttEntryList[i];
const ttinfo& info = ttInfoList[entry.indexToLocalTime];
struct tm* gmTime = gmtime(&entry.time);
TzTransition trans;
trans.time = entry.time;
trans.utcOffset = info.gmtOffset;
trans.isDst = info.isDst;
trans.year = gmTime->tm_year + 1900;
trans.abbrName[0] = 0;
int j = info.abbrIndex;
int k = 0;
for (; (j < (int) ttAbbrList.size()) && (k < TZ_ABBR_MAX_LEN);
j++, k++) {
trans.abbrName[k] = ttAbbrList[j];
if (ttAbbrList[j] == 0)
break;
}
trans.abbrName[TZ_ABBR_MAX_LEN-1] = 0;
result.push_back(trans);
}
return result;
}
int
tzload(const char *name, char *canonname, struct state * sp, 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;
sp->goback = sp->goahead = FALSE;
if (name == NULL && (name = TZDEFAULT) == NULL)
return -1;
if (name[0] == ':')
++name;
fid = pg_open_tzfile(name, canonname);
if (fid < 0)
return -1;
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;
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 ||
sp->charcnt < 0 || sp->charcnt > TZ_MAX_CHARS ||
(ttisstdcnt != sp->typecnt && ttisstdcnt != 0) ||
(ttisgmtcnt != sp->typecnt && ttisgmtcnt != 0))
return -1;
if (nread - (p - u.buf) <
sp->timecnt * stored + /* ats */
sp->timecnt + /* types */
sp->typecnt * 6 + /* ttinfos */
sp->charcnt + /* chars */
sp->leapcnt * (stored + 4) + /* lsinfos */
ttisstdcnt + /* ttisstds */
ttisgmtcnt) /* ttisgmts */
return -1;
for (i = 0; i < sp->timecnt; ++i)
{
sp->ats[i] = (stored == 4) ? detzcode(p) : detzcode64(p);
p += stored;
}
for (i = 0; i < sp->timecnt; ++i)
{
sp->types[i] = (unsigned char) *p++;
if (sp->types[i] >= sp->typecnt)
return -1;
}
for (i = 0; i < sp->typecnt; ++i)
{
struct ttinfo *ttisp;
ttisp = &sp->ttis[i];
ttisp->tt_gmtoff = detzcode(p);
p += 4;
ttisp->tt_isdst = (unsigned char) *p++;
if (ttisp->tt_isdst != 0 && ttisp->tt_isdst != 1)
return -1;
ttisp->tt_abbrind = (unsigned char) *p++;
if (ttisp->tt_abbrind < 0 ||
ttisp->tt_abbrind > sp->charcnt)
return -1;
}
for (i = 0; i < sp->charcnt; ++i)
sp->chars[i] = *p++;
sp->chars[i] = '\0'; /* ensure '\0' at end */
for (i = 0; i < sp->leapcnt; ++i)
{
struct lsinfo *lsisp;
lsisp = &sp->lsis[i];
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)
{
struct ttinfo *ttisp;
ttisp = &sp->ttis[i];
if (ttisstdcnt == 0)
ttisp->tt_ttisstd = FALSE;
else
{
ttisp->tt_ttisstd = *p++;
if (ttisp->tt_ttisstd != TRUE &&
ttisp->tt_ttisstd != FALSE)
return -1;
}
}
for (i = 0; i < sp->typecnt; ++i)
{
struct ttinfo *ttisp;
ttisp = &sp->ttis[i];
if (ttisgmtcnt == 0)
ttisp->tt_ttisgmt = FALSE;
else
{
ttisp->tt_ttisgmt = *p++;
if (ttisp->tt_ttisgmt != TRUE &&
ttisp->tt_ttisgmt != FALSE)
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(pg_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(pg_time_t) && TYPE_INTEGRAL(pg_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];
}
}
if (sp->timecnt > 1)
{
for (i = 1; i < sp->timecnt; ++i)
if (typesequiv(sp, sp->types[i], sp->types[0]) &&
differ_by_repeat(sp->ats[i], sp->ats[0]))
{
sp->goback = TRUE;
break;
}
for (i = sp->timecnt - 2; i >= 0; --i)
if (typesequiv(sp, sp->types[sp->timecnt - 1],
sp->types[i]) &&
differ_by_repeat(sp->ats[sp->timecnt - 1],
sp->ats[i]))
{
sp->goahead = TRUE;
break;
}
}
return 0;
}
static int
tzload(const char *name, struct state * const sp, const int doextend)
{
const char * p;
int i;
int fid;
int stored;
int nread;
typedef union {
struct tzhead tzhead;
char buf[2 * sizeof(struct tzhead) +
2 * sizeof *sp +
4 * TZ_MAX_TIMES];
} u_t;
u_t u;
u_t * const up = &u;
sp->goback = sp->goahead = FALSE;
/* XXX The following is from OpenBSD, and I'm not sure it is correct */
if (name != NULL && issetugid() != 0)
if ((name[0] == ':' && name[1] == '/') ||
name[0] == '/' || strchr(name, '.'))
name = NULL;
if (name == NULL && (name = TZDEFAULT) == NULL)
goto oops;
{
int doaccess;
struct stat stab;
/*
** Section 4.9.1 of the C standard says that
** "FILENAME_MAX expands to an integral constant expression
** that is the size needed for an array of char large enough
** to hold the longest file name string that the implementation
** guarantees can be opened."
*/
char fullname[FILENAME_MAX + 1];
if (name[0] == ':')
++name;
doaccess = name[0] == '/';
if (!doaccess) {
if ((p = TZDIR) == NULL)
goto oops;
if ((strlen(p) + 1 + strlen(name) + 1) >= sizeof fullname)
goto oops;
strcpy(fullname, p);
strcat(fullname, "/");
strcat(fullname, name);
/*
** Set doaccess if '.' (as in "../") shows up in name.
*/
if (strchr(name, '.') != NULL)
doaccess = TRUE;
name = fullname;
}
if (doaccess && access(name, R_OK) != 0)
goto oops;
if ((fid = _open(name, O_RDONLY)) == -1)
goto oops;
if ((_fstat(fid, &stab) < 0) || !S_ISREG(stab.st_mode)) {
_close(fid);
return -1;
}
}
nread = _read(fid, up->buf, sizeof up->buf);
if (_close(fid) < 0 || nread <= 0)
goto oops;
for (stored = 4; stored <= 8; stored *= 2) {
int ttisstdcnt;
int ttisgmtcnt;
ttisstdcnt = (int) detzcode(up->tzhead.tzh_ttisstdcnt);
ttisgmtcnt = (int) detzcode(up->tzhead.tzh_ttisgmtcnt);
sp->leapcnt = (int) detzcode(up->tzhead.tzh_leapcnt);
sp->timecnt = (int) detzcode(up->tzhead.tzh_timecnt);
sp->typecnt = (int) detzcode(up->tzhead.tzh_typecnt);
sp->charcnt = (int) detzcode(up->tzhead.tzh_charcnt);
p = up->tzhead.tzh_charcnt + sizeof up->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 ||
sp->charcnt < 0 || sp->charcnt > TZ_MAX_CHARS ||
(ttisstdcnt != sp->typecnt && ttisstdcnt != 0) ||
(ttisgmtcnt != sp->typecnt && ttisgmtcnt != 0))
goto oops;
if (nread - (p - up->buf) <
sp->timecnt * stored + /* ats */
sp->timecnt + /* types */
sp->typecnt * 6 + /* ttinfos */
sp->charcnt + /* chars */
sp->leapcnt * (stored + 4) + /* lsinfos */
ttisstdcnt + /* ttisstds */
ttisgmtcnt) /* ttisgmts */
goto oops;
for (i = 0; i < sp->timecnt; ++i) {
sp->ats[i] = (stored == 4) ?
detzcode(p) : detzcode64(p);
p += stored;
}
for (i = 0; i < sp->timecnt; ++i) {
sp->types[i] = (unsigned char) *p++;
if (sp->types[i] >= sp->typecnt)
goto oops;
}
for (i = 0; i < sp->typecnt; ++i) {
struct ttinfo * ttisp;
ttisp = &sp->ttis[i];
ttisp->tt_gmtoff = detzcode(p);
p += 4;
ttisp->tt_isdst = (unsigned char) *p++;
if (ttisp->tt_isdst != 0 && ttisp->tt_isdst != 1)
goto oops;
ttisp->tt_abbrind = (unsigned char) *p++;
if (ttisp->tt_abbrind < 0 ||
ttisp->tt_abbrind > sp->charcnt)
goto oops;
}
for (i = 0; i < sp->charcnt; ++i)
sp->chars[i] = *p++;
sp->chars[i] = '\0'; /* ensure '\0' at end */
for (i = 0; i < sp->leapcnt; ++i) {
struct lsinfo * lsisp;
lsisp = &sp->lsis[i];
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) {
struct ttinfo * ttisp;
ttisp = &sp->ttis[i];
if (ttisstdcnt == 0)
ttisp->tt_ttisstd = FALSE;
else {
ttisp->tt_ttisstd = *p++;
if (ttisp->tt_ttisstd != TRUE &&
ttisp->tt_ttisstd != FALSE)
goto oops;
}
}
for (i = 0; i < sp->typecnt; ++i) {
struct ttinfo * ttisp;
ttisp = &sp->ttis[i];
if (ttisgmtcnt == 0)
ttisp->tt_ttisgmt = FALSE;
else {
ttisp->tt_ttisgmt = *p++;
if (ttisp->tt_ttisgmt != TRUE &&
ttisp->tt_ttisgmt != FALSE)
goto oops;
}
}
/*
** 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 (up->tzhead.tzh_version[0] == '\0')
break;
nread -= p - up->buf;
for (i = 0; i < nread; ++i)
up->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 &&
up->buf[0] == '\n' && up->buf[nread - 1] == '\n' &&
sp->typecnt + 2 <= TZ_MAX_TYPES) {
struct state ts;
int result;
up->buf[nread - 1] = '\0';
result = tzparse(&up->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];
}
}
if (sp->timecnt > 1) {
for (i = 1; i < sp->timecnt; ++i)
if (typesequiv(sp, sp->types[i], sp->types[0]) &&
differ_by_repeat(sp->ats[i], sp->ats[0])) {
sp->goback = TRUE;
break;
}
for (i = sp->timecnt - 2; i >= 0; --i)
if (typesequiv(sp, sp->types[sp->timecnt - 1],
sp->types[i]) &&
differ_by_repeat(sp->ats[sp->timecnt - 1],
sp->ats[i])) {
sp->goahead = TRUE;
break;
}
}
return 0;
oops:
return -1;
}