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-rw-r--r--duration.c354
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+/*
+ * $Id: duration.c 4518 2011-02-24 15:39:09Z matthijs $
+ *
+ * Copyright (c) 2009 NLNet Labs. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
+ * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
+ * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+ * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+/**
+ *
+ * This file is copied from the OpenDNSSEC source repository
+ * and only slightly adapted to make it fit.
+ */
+
+/**
+ *
+ * Durations.
+ */
+
+#include <ldns/config.h>
+#include <ldns/duration.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+
+
+/**
+ * Create a new 'instant' duration.
+ *
+ */
+ldns_duration_type*
+ldns_duration_create(void)
+{
+ ldns_duration_type* duration;
+
+ duration = malloc(sizeof(ldns_duration_type));
+ if (!duration) {
+ return NULL;
+ }
+ duration->years = 0;
+ duration->months = 0;
+ duration->weeks = 0;
+ duration->days = 0;
+ duration->hours = 0;
+ duration->minutes = 0;
+ duration->seconds = 0;
+ return duration;
+}
+
+
+/**
+ * Compare durations.
+ *
+ */
+int
+ldns_duration_compare(const ldns_duration_type* d1, const ldns_duration_type* d2)
+{
+ if (!d1 && !d2) {
+ return 0;
+ }
+ if (!d1 || !d2) {
+ return d1?-1:1;
+ }
+
+ if (d1->years != d2->years) {
+ return (int) (d1->years - d2->years);
+ }
+ if (d1->months != d2->months) {
+ return (int) (d1->months - d2->months);
+ }
+ if (d1->weeks != d2->weeks) {
+ return (int) (d1->weeks - d2->weeks);
+ }
+ if (d1->days != d2->days) {
+ return (int) (d1->days - d2->days);
+ }
+ if (d1->hours != d2->hours) {
+ return (int) (d1->hours - d2->hours);
+ }
+ if (d1->minutes != d2->minutes) {
+ return (int) (d1->minutes - d2->minutes);
+ }
+ if (d1->seconds != d2->seconds) {
+ return (int) (d1->seconds - d2->seconds);
+ }
+
+ return 0;
+}
+
+
+/**
+ * Create a duration from string.
+ *
+ */
+ldns_duration_type*
+ldns_duration_create_from_string(const char* str)
+{
+ ldns_duration_type* duration = ldns_duration_create();
+ char* P, *X, *T, *W;
+ int not_weeks = 0;
+
+ if (!duration) {
+ return NULL;
+ }
+ if (!str) {
+ return duration;
+ }
+
+ P = strchr(str, 'P');
+ if (!P) {
+ ldns_duration_cleanup(duration);
+ return NULL;
+ }
+
+ T = strchr(str, 'T');
+ X = strchr(str, 'Y');
+ if (X) {
+ duration->years = (time_t) atoi(str+1);
+ str = X;
+ not_weeks = 1;
+ }
+ X = strchr(str, 'M');
+ if (X && (!T || (size_t) (X-P) < (size_t) (T-P))) {
+ duration->months = (time_t) atoi(str+1);
+ str = X;
+ not_weeks = 1;
+ }
+ X = strchr(str, 'D');
+ if (X) {
+ duration->days = (time_t) atoi(str+1);
+ str = X;
+ not_weeks = 1;
+ }
+ if (T) {
+ str = T;
+ not_weeks = 1;
+ }
+ X = strchr(str, 'H');
+ if (X && T) {
+ duration->hours = (time_t) atoi(str+1);
+ str = X;
+ not_weeks = 1;
+ }
+ X = strrchr(str, 'M');
+ if (X && T && (size_t) (X-P) > (size_t) (T-P)) {
+ duration->minutes = (time_t) atoi(str+1);
+ str = X;
+ not_weeks = 1;
+ }
+ X = strchr(str, 'S');
+ if (X && T) {
+ duration->seconds = (time_t) atoi(str+1);
+ str = X;
+ not_weeks = 1;
+ }
+
+ W = strchr(str, 'W');
+ if (W) {
+ if (not_weeks) {
+ ldns_duration_cleanup(duration);
+ return NULL;
+ } else {
+ duration->weeks = (time_t) atoi(str+1);
+ str = W;
+ }
+ }
+ return duration;
+}
+
+
+/**
+ * Get the number of digits in a number.
+ *
+ */
+static size_t
+digits_in_number(time_t duration)
+{
+ uint32_t period = (uint32_t) duration;
+ size_t count = 0;
+
+ while (period > 0) {
+ count++;
+ period /= 10;
+ }
+ return count;
+}
+
+
+/**
+ * Convert a duration to a string.
+ *
+ */
+char*
+ldns_duration2string(const ldns_duration_type* duration)
+{
+ char* str = NULL, *num = NULL;
+ size_t count = 2;
+ int T = 0;
+
+ if (!duration) {
+ return NULL;
+ }
+
+ if (duration->years > 0) {
+ count = count + 1 + digits_in_number(duration->years);
+ }
+ if (duration->months > 0) {
+ count = count + 1 + digits_in_number(duration->months);
+ }
+ if (duration->weeks > 0) {
+ count = count + 1 + digits_in_number(duration->weeks);
+ }
+ if (duration->days > 0) {
+ count = count + 1 + digits_in_number(duration->days);
+ }
+ if (duration->hours > 0) {
+ count = count + 1 + digits_in_number(duration->hours);
+ T = 1;
+ }
+ if (duration->minutes > 0) {
+ count = count + 1 + digits_in_number(duration->minutes);
+ T = 1;
+ }
+ if (duration->seconds > 0) {
+ count = count + 1 + digits_in_number(duration->seconds);
+ T = 1;
+ }
+ if (T) {
+ count++;
+ }
+
+ str = (char*) calloc(count, sizeof(char));
+ str[0] = 'P';
+ str[1] = '\0';
+
+ if (duration->years > 0) {
+ count = digits_in_number(duration->years);
+ num = (char*) calloc(count+2, sizeof(char));
+ snprintf(num, count+2, "%uY", (unsigned int) duration->years);
+ str = strncat(str, num, count+2);
+ free((void*) num);
+ }
+ if (duration->months > 0) {
+ count = digits_in_number(duration->months);
+ num = (char*) calloc(count+2, sizeof(char));
+ snprintf(num, count+2, "%uM", (unsigned int) duration->months);
+ str = strncat(str, num, count+2);
+ free((void*) num);
+ }
+ if (duration->weeks > 0) {
+ count = digits_in_number(duration->weeks);
+ num = (char*) calloc(count+2, sizeof(char));
+ snprintf(num, count+2, "%uW", (unsigned int) duration->weeks);
+ str = strncat(str, num, count+2);
+ free((void*) num);
+ }
+ if (duration->days > 0) {
+ count = digits_in_number(duration->days);
+ num = (char*) calloc(count+2, sizeof(char));
+ snprintf(num, count+2, "%uD", (unsigned int) duration->days);
+ str = strncat(str, num, count+2);
+ free((void*) num);
+ }
+ if (T) {
+ str = strncat(str, "T", 1);
+ }
+ if (duration->hours > 0) {
+ count = digits_in_number(duration->hours);
+ num = (char*) calloc(count+2, sizeof(char));
+ snprintf(num, count+2, "%uH", (unsigned int) duration->hours);
+ str = strncat(str, num, count+2);
+ free((void*) num);
+ }
+ if (duration->minutes > 0) {
+ count = digits_in_number(duration->minutes);
+ num = (char*) calloc(count+2, sizeof(char));
+ snprintf(num, count+2, "%uM", (unsigned int) duration->minutes);
+ str = strncat(str, num, count+2);
+ free((void*) num);
+ }
+ if (duration->seconds > 0) {
+ count = digits_in_number(duration->seconds);
+ num = (char*) calloc(count+2, sizeof(char));
+ snprintf(num, count+2, "%uS", (unsigned int) duration->seconds);
+ str = strncat(str, num, count+2);
+ free((void*) num);
+ }
+ return str;
+}
+
+
+/**
+ * Convert a duration to a time.
+ *
+ */
+time_t
+ldns_duration2time(const ldns_duration_type* duration)
+{
+ time_t period = 0;
+
+ if (duration) {
+ period += (duration->seconds);
+ period += (duration->minutes)*60;
+ period += (duration->hours)*3600;
+ period += (duration->days)*86400;
+ period += (duration->weeks)*86400*7;
+ period += (duration->months)*86400*31;
+ period += (duration->years)*86400*365;
+
+ /* [TODO] calculate correct number of days in this month/year */
+ /*
+ if (duration->months || duration->years) {
+ }
+ */
+ }
+ return period;
+}
+
+
+/**
+ * Clean up duration.
+ *
+ */
+void
+ldns_duration_cleanup(ldns_duration_type* duration)
+{
+ if (!duration) {
+ return;
+ }
+ free(duration);
+ return;
+}
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