/*
   +----------------------------------------------------------------------+
   | PHP Version 5                                                        |
   +----------------------------------------------------------------------+
   | Copyright (c) 1997-2014 The PHP Group                                |
   +----------------------------------------------------------------------+
   | This source file is subject to version 3.01 of the PHP license,      |
   | that is bundled with this package in the file LICENSE, and is        |
   | available through the world-wide-web at the following url:           |
   | http://www.php.net/license/3_01.txt                                  |
   | If you did not receive a copy of the PHP license and are unable to   |
   | obtain it through the world-wide-web, please send a note to          |
   | license@php.net so we can mail you a copy immediately.               |
   +----------------------------------------------------------------------+
   | Authors: Derick Rethans <derick@derickrethans.nl>                    |
   +----------------------------------------------------------------------+
 */

/* $Id$ */

#include "timelib.h"
#include <ctype.h>
#include <math.h>

#define TIMELIB_TIME_FREE(m) 	\
	if (m) {		\
		free(m);	\
		m = NULL;	\
	}			\

#define TIMELIB_LLABS(y) (y < 0 ? (y * -1) : y)

#define HOUR(a) (int)(a * 60)

timelib_time* timelib_time_ctor(void)
{
	timelib_time *t;
	t = calloc(1, sizeof(timelib_time));

	return t;
}

timelib_rel_time* timelib_rel_time_ctor(void)
{
	timelib_rel_time *t;
	t = calloc(1, sizeof(timelib_rel_time));

	return t;
}

timelib_time* timelib_time_clone(timelib_time *orig)
{
	timelib_time *tmp = timelib_time_ctor();
	memcpy(tmp, orig, sizeof(timelib_time));
	if (orig->tz_abbr) {
		tmp->tz_abbr = strdup(orig->tz_abbr);
	}
	if (orig->tz_info) {
		tmp->tz_info = orig->tz_info;
	}
	return tmp;
}

timelib_rel_time* timelib_rel_time_clone(timelib_rel_time *rel)
{
	timelib_rel_time *tmp = timelib_rel_time_ctor();
	memcpy(tmp, rel, sizeof(timelib_rel_time));
	return tmp;
}

void timelib_time_tz_abbr_update(timelib_time* tm, char* tz_abbr)
{
	unsigned int i;
	
	TIMELIB_TIME_FREE(tm->tz_abbr);
	tm->tz_abbr = strdup(tz_abbr);
	for (i = 0; i < strlen(tz_abbr); i++) {
		tm->tz_abbr[i] = toupper(tz_abbr[i]);
	}
}

void timelib_time_dtor(timelib_time* t)
{
	TIMELIB_TIME_FREE(t->tz_abbr);
	TIMELIB_TIME_FREE(t);
}

void timelib_rel_time_dtor(timelib_rel_time* t)
{
	TIMELIB_TIME_FREE(t);
}

timelib_time_offset* timelib_time_offset_ctor(void)
{
	timelib_time_offset *t;
	t = calloc(1, sizeof(timelib_time_offset));

	return t;
}

void timelib_time_offset_dtor(timelib_time_offset* t)
{
	TIMELIB_TIME_FREE(t->abbr);
	TIMELIB_TIME_FREE(t);
}

timelib_tzinfo* timelib_tzinfo_ctor(char *name)
{
	timelib_tzinfo *t;
	t = calloc(1, sizeof(timelib_tzinfo));
	t->name = strdup(name);

	return t;
}

timelib_tzinfo *timelib_tzinfo_clone(timelib_tzinfo *tz)
{
	timelib_tzinfo *tmp = timelib_tzinfo_ctor(tz->name);
	tmp->ttisgmtcnt = tz->ttisgmtcnt;
	tmp->ttisstdcnt = tz->ttisstdcnt;
	tmp->leapcnt = tz->leapcnt;
	tmp->timecnt = tz->timecnt;
	tmp->typecnt = tz->typecnt;
	tmp->charcnt = tz->charcnt;
	
	tmp->trans = (int32_t *) malloc(tz->timecnt * sizeof(int32_t));
	tmp->trans_idx = (unsigned char*) malloc(tz->timecnt * sizeof(unsigned char));
	memcpy(tmp->trans, tz->trans, tz->timecnt * sizeof(int32_t));
	memcpy(tmp->trans_idx, tz->trans_idx, tz->timecnt * sizeof(unsigned char));

	tmp->type = (ttinfo*) malloc(tz->typecnt * sizeof(struct ttinfo));
	memcpy(tmp->type, tz->type, tz->typecnt * sizeof(struct ttinfo));

	tmp->timezone_abbr = (char*) malloc(tz->charcnt);
	memcpy(tmp->timezone_abbr, tz->timezone_abbr, tz->charcnt);

	tmp->leap_times = (tlinfo*) malloc(tz->leapcnt * sizeof(tlinfo));
	memcpy(tmp->leap_times, tz->leap_times, tz->leapcnt * sizeof(tlinfo));

	return tmp;
}

void timelib_tzinfo_dtor(timelib_tzinfo *tz)
{
	TIMELIB_TIME_FREE(tz->name);
	TIMELIB_TIME_FREE(tz->trans);
	TIMELIB_TIME_FREE(tz->trans_idx);
	TIMELIB_TIME_FREE(tz->type);
	TIMELIB_TIME_FREE(tz->timezone_abbr);
	TIMELIB_TIME_FREE(tz->leap_times);
	TIMELIB_TIME_FREE(tz->location.comments);
	TIMELIB_TIME_FREE(tz);
	tz = NULL;
}

char *timelib_get_tz_abbr_ptr(timelib_time *t)
{
	if (!t->sse_uptodate) {
		timelib_update_ts(t, NULL);
	};
	return t->tz_abbr;
}

void timelib_error_container_dtor(timelib_error_container *errors)
{
	int i;

	for (i = 0; i < errors->warning_count; i++) {
		free(errors->warning_messages[i].message);
	}
	free(errors->warning_messages);
	for (i = 0; i < errors->error_count; i++) {
		free(errors->error_messages[i].message);
	}
	free(errors->error_messages);
	free(errors);
}

signed long timelib_date_to_int(timelib_time *d, int *error)
{
	timelib_sll ts;

	ts = d->sse;

	if (ts < LONG_MIN || ts > LONG_MAX) {
		if (error) {
			*error = 1;
		}
		return 0;
	}
	if (error) {
		*error = 0;
	}
	return (signed long) d->sse;
}

void timelib_decimal_hour_to_hms(double h, int *hour, int *min, int *sec)
{
	*hour = floor(h);
	*min =  floor((h - *hour) * 60);
	*sec =  (h - *hour - ((float) *min / 60)) * 3600;
}

void timelib_dump_date(timelib_time *d, int options)
{
	if ((options & 2) == 2) {
		printf("TYPE: %d ", d->zone_type);
	}
	printf("TS: %lld | %s%04lld-%02lld-%02lld %02lld:%02lld:%02lld",
		d->sse, d->y < 0 ? "-" : "", TIMELIB_LLABS(d->y), d->m, d->d, d->h, d->i, d->s);
	if (d->f > +0.0) {
		printf(" %.5f", d->f);
	}

	if (d->is_localtime) {
		switch (d->zone_type) {
			case TIMELIB_ZONETYPE_OFFSET: /* Only offset */
				printf(" GMT %05d%s", d->z, d->dst == 1 ? " (DST)" : "");
				break;
			case TIMELIB_ZONETYPE_ID: /* Timezone struct */
				/* Show abbreviation if wanted */
				if (d->tz_abbr) {
					printf(" %s", d->tz_abbr);
				}
				/* Do we have a TimeZone struct? */
				if (d->tz_info) {
					printf(" %s", d->tz_info->name);
				}
				break;
			case TIMELIB_ZONETYPE_ABBR:
				printf(" %s", d->tz_abbr);
				printf(" %05d%s", d->z, d->dst == 1 ? " (DST)" : "");
				break;
		}
	}

	if ((options & 1) == 1) {
		if (d->have_relative) {
			printf("%3lldY %3lldM %3lldD / %3lldH %3lldM %3lldS", 
				d->relative.y, d->relative.m, d->relative.d, d->relative.h, d->relative.i, d->relative.s);
			if (d->relative.first_last_day_of != 0) {
				switch (d->relative.first_last_day_of) {
					case 1:
						printf(" / first day of");
						break;
					case 2:
						printf(" / last day of");
						break;
				}
			}
			if (d->relative.have_weekday_relative) {
				printf(" / %d.%d", d->relative.weekday, d->relative.weekday_behavior);
			}
			if (d->relative.have_special_relative) {
				switch (d->relative.special.type) {
					case TIMELIB_SPECIAL_WEEKDAY:
						printf(" / %lld weekday", d->relative.special.amount);
						break;
					case TIMELIB_SPECIAL_DAY_OF_WEEK_IN_MONTH:
						printf(" / x y of z month");
						break;
					case TIMELIB_SPECIAL_LAST_DAY_OF_WEEK_IN_MONTH:
						printf(" / last y of z month");
						break;
				}
			}
		}
	}
	printf("\n");
}

void timelib_dump_rel_time(timelib_rel_time *d)
{
	printf("%3lldY %3lldM %3lldD / %3lldH %3lldM %3lldS (days: %lld)%s", 
		d->y, d->m, d->d, d->h, d->i, d->s, d->days, d->invert ? " inverted" : "");
	if (d->first_last_day_of != 0) {
		switch (d->first_last_day_of) {
			case 1:
				printf(" / first day of");
				break;
			case 2:
				printf(" / last day of");
				break;
		}
	}
	printf("\n");
}

long timelib_parse_tz_cor(char **ptr)
{
        char *begin = *ptr, *end;
        long  tmp;

        while (isdigit(**ptr) || **ptr == ':') {
                ++*ptr;
        }
        end = *ptr;
        switch (end - begin) {
                case 1:
                case 2:
                        return HOUR(strtol(begin, NULL, 10));
                        break;
                case 3:
                case 4:
                        if (begin[1] == ':') {
                                tmp = HOUR(strtol(begin, NULL, 10)) + strtol(begin + 2, NULL, 10);
                                return tmp;
                        } else if (begin[2] == ':') {
                                tmp = HOUR(strtol(begin, NULL, 10)) + strtol(begin + 3, NULL, 10);
                                return tmp;
                        } else {
                                tmp = strtol(begin, NULL, 10);
                                return HOUR(tmp / 100) + tmp % 100;
                        }
                case 5:
                        tmp = HOUR(strtol(begin, NULL, 10)) + strtol(begin + 3, NULL, 10);
                        return tmp;
        }
        return 0;
}
