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-rw-r--r--libkcal/libical/src/libical/icalduration.c331
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diff --git a/libkcal/libical/src/libical/icalduration.c b/libkcal/libical/src/libical/icalduration.c
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+/* -*- Mode: C -*-
+ ======================================================================
+ FILE: icaltime.c
+ CREATOR: eric 02 June 2000
+
+
+ (C) COPYRIGHT 2000, Eric Busboom <eric@softwarestudio.org>
+ http://www.softwarestudio.org
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of either:
+
+ The LGPL as published by the Free Software Foundation, version
+ 2.1, available at: http://www.fsf.org/copyleft/lesser.html
+
+ Or:
+
+ The Mozilla Public License Version 1.0. You may obtain a copy of
+ the License at http://www.mozilla.org/MPL/
+
+ The Original Code is eric. The Initial Developer of the Original
+ Code is Eric Busboom
+
+
+ ======================================================================*/
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include "icalduration.h"
+
+#include <assert.h>
+#include <string.h>
+#include <stdlib.h>
+#include <stdio.h>
+
+#include "icalerror.h"
+#include "icalmemory.h"
+#include "icalvalue.h"
+
+
+
+
+/* From Seth Alves, <alves@hungry.com> */
+struct icaldurationtype icaldurationtype_from_int(int t)
+{
+ struct icaldurationtype dur;
+ int used = 0;
+
+ dur = icaldurationtype_null_duration();
+
+ if(t < 0){
+ dur.is_neg = 1;
+ t = -t;
+ }
+
+ if (t % (60 * 60 * 24 * 7) == 0) {
+ dur.weeks = t / (60 * 60 * 24 * 7);
+ } else {
+ used += dur.weeks * (60 * 60 * 24 * 7);
+ dur.days = (t - used) / (60 * 60 * 24);
+ used += dur.days * (60 * 60 * 24);
+ dur.hours = (t - used) / (60 * 60);
+ used += dur.hours * (60 * 60);
+ dur.minutes = (t - used) / (60);
+ used += dur.minutes * (60);
+ dur.seconds = (t - used);
+ }
+
+ return dur;
+}
+
+struct icaldurationtype icaldurationtype_from_string(const char* str)
+{
+
+ int i;
+ int begin_flag = 0;
+ int time_flag = 0;
+ int date_flag = 0;
+ int week_flag = 0;
+ int digits=-1;
+ int scan_size = -1;
+ int size = strlen(str);
+ char p;
+ struct icaldurationtype d;
+
+ memset(&d, 0, sizeof(struct icaldurationtype));
+
+ for(i=0;i != size;i++){
+ p = str[i];
+
+ switch(p)
+ {
+ case '-': {
+ if(i != 0 || begin_flag == 1) goto error;
+
+ d.is_neg = 1;
+ break;
+ }
+
+ case 'P': {
+ if (i != 0 && i !=1 ) goto error;
+ begin_flag = 1;
+ break;
+ }
+
+ case 'T': {
+ time_flag = 1;
+ break;
+ }
+
+ case '0':
+ case '1':
+ case '2':
+ case '3':
+ case '4':
+ case '5':
+ case '6':
+ case '7':
+ case '8':
+ case '9':
+ {
+
+ /* HACK. Skip any more digits if the l;ast one
+ read has not been assigned */
+ if(digits != -1){
+ break;
+ }
+
+ if (begin_flag == 0) goto error;
+ /* Get all of the digits, not one at a time */
+ scan_size = sscanf(&str[i],"%d",&digits);
+ if(scan_size == 0) goto error;
+ break;
+ }
+
+ case 'H': {
+ if (time_flag == 0||week_flag == 1||d.hours !=0||digits ==-1)
+ goto error;
+ d.hours = digits; digits = -1;
+ break;
+ }
+ case 'M': {
+ if (time_flag == 0||week_flag==1||d.minutes != 0||digits ==-1)
+ goto error;
+ d.minutes = digits; digits = -1;
+ break;
+ }
+ case 'S': {
+ if (time_flag == 0||week_flag==1||d.seconds!=0||digits ==-1)
+ goto error;
+ d.seconds = digits; digits = -1;
+ break;
+ }
+ case 'W': {
+ if (time_flag==1||date_flag==1||d.weeks!=0||digits ==-1)
+ goto error;
+ week_flag = 1;
+ d.weeks = digits; digits = -1;
+ break;
+ }
+ case 'D': {
+ if (time_flag==1||week_flag==1||d.days!=0||digits ==-1)
+ goto error;
+ date_flag = 1;
+ d.days = digits; digits = -1;
+ break;
+ }
+ default: {
+ goto error;
+ }
+
+ }
+ }
+
+ return d;
+
+
+ error:
+ icalerror_set_errno(ICAL_MALFORMEDDATA_ERROR);
+ return icaldurationtype_bad_duration();
+}
+
+#define TMP_BUF_SIZE 1024
+static
+void append_duration_segment(char** buf, char** buf_ptr, size_t* buf_size,
+ const char* sep, unsigned int value) {
+
+ char temp[TMP_BUF_SIZE];
+
+ snprintf(temp,sizeof(temp),"%d",value);
+
+ icalmemory_append_string(buf, buf_ptr, buf_size, temp);
+ icalmemory_append_string(buf, buf_ptr, buf_size, sep);
+
+}
+
+char* icaldurationtype_as_ical_string(struct icaldurationtype d)
+{
+
+ char *buf, *output_line;
+ size_t buf_size = 256;
+ char* buf_ptr = 0;
+ int seconds;
+
+ buf = (char*)icalmemory_new_buffer(buf_size);
+ buf_ptr = buf;
+
+
+ seconds = icaldurationtype_as_int(d);
+
+ if(seconds !=0){
+
+ if(d.is_neg == 1){
+ icalmemory_append_char(&buf, &buf_ptr, &buf_size, '-');
+ }
+
+ icalmemory_append_char(&buf, &buf_ptr, &buf_size, 'P');
+
+ if (d.weeks != 0 ) {
+ append_duration_segment(&buf, &buf_ptr, &buf_size, "W", d.weeks);
+ }
+
+ if (d.days != 0 ) {
+ append_duration_segment(&buf, &buf_ptr, &buf_size, "D", d.days);
+ }
+
+ if (d.hours != 0 || d.minutes != 0 || d.seconds != 0) {
+
+ icalmemory_append_string(&buf, &buf_ptr, &buf_size, "T");
+
+ if (d.hours != 0 ) {
+ append_duration_segment(&buf, &buf_ptr, &buf_size, "H", d.hours);
+ }
+ if (d.minutes != 0 ) {
+ append_duration_segment(&buf, &buf_ptr, &buf_size, "M",
+ d.minutes);
+ }
+ if (d.seconds != 0 ) {
+ append_duration_segment(&buf, &buf_ptr, &buf_size, "S",
+ d.seconds);
+ }
+
+ }
+ } else {
+ icalmemory_append_string(&buf, &buf_ptr, &buf_size, "PT0S");
+ }
+
+ output_line = icalmemory_tmp_copy(buf);
+ icalmemory_free_buffer(buf);
+
+ return output_line;
+
+}
+
+
+/* From Russel Steinthal */
+int icaldurationtype_as_int(struct icaldurationtype dur)
+{
+ return (int)( (dur.seconds +
+ (60 * dur.minutes) +
+ (60 * 60 * dur.hours) +
+ (60 * 60 * 24 * dur.days) +
+ (60 * 60 * 24 * 7 * dur.weeks))
+ * (dur.is_neg==1? -1 : 1) ) ;
+}
+
+struct icaldurationtype icaldurationtype_null_duration(void)
+{
+ struct icaldurationtype d;
+
+ memset(&d,0,sizeof(struct icaldurationtype));
+
+ return d;
+}
+
+int icaldurationtype_is_null_duration(struct icaldurationtype d)
+{
+ if(icaldurationtype_as_int(d) == 0){
+ return 1;
+ } else {
+ return 0;
+ }
+}
+
+/* in icalvalue_new_from_string_with_error, we should not call
+ icaldurationtype_is_null_duration() to see if there is an error
+ condition. Null duration is perfectly valid for an alarm.
+ We cannot depend on the caller to check icalerrno either,
+ following the philosophy of unix errno. we set the is_neg
+ to -1 to indicate that this is a bad duration.
+*/
+struct icaldurationtype icaldurationtype_bad_duration()
+{
+ struct icaldurationtype d;
+ memset(&d,0,sizeof(struct icaldurationtype));
+ d.is_neg = -1;
+ return d;
+}
+
+int icaldurationtype_is_bad_duration(struct icaldurationtype d)
+{
+ return (d.is_neg == -1);
+}
+
+
+struct icaltimetype icaltime_add(struct icaltimetype t,
+ struct icaldurationtype d)
+{
+ int dt = icaldurationtype_as_int(d);
+
+ t.second += dt;
+
+ t = icaltime_normalize(t);
+
+ return t;
+}
+
+struct icaldurationtype icaltime_subtract(struct icaltimetype t1,
+ struct icaltimetype t2)
+{
+
+ time_t t1t = icaltime_as_timet(t1);
+ time_t t2t = icaltime_as_timet(t2);
+
+ return icaldurationtype_from_int((int)(t1t-t2t));
+
+
+}
+
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