116864bae0f51c32c456da2c43adf7a057c0c4882Mike Lockwood/* 216864bae0f51c32c456da2c43adf7a057c0c4882Mike Lockwood * Copyright (C) 2010 The Android Open Source Project 316864bae0f51c32c456da2c43adf7a057c0c4882Mike Lockwood * 416864bae0f51c32c456da2c43adf7a057c0c4882Mike Lockwood * Licensed under the Apache License, Version 2.0 (the "License"); 516864bae0f51c32c456da2c43adf7a057c0c4882Mike Lockwood * you may not use this file except in compliance with the License. 616864bae0f51c32c456da2c43adf7a057c0c4882Mike Lockwood * You may obtain a copy of the License at 716864bae0f51c32c456da2c43adf7a057c0c4882Mike Lockwood * 816864bae0f51c32c456da2c43adf7a057c0c4882Mike Lockwood * http://www.apache.org/licenses/LICENSE-2.0 916864bae0f51c32c456da2c43adf7a057c0c4882Mike Lockwood * 1016864bae0f51c32c456da2c43adf7a057c0c4882Mike Lockwood * Unless required by applicable law or agreed to in writing, software 1116864bae0f51c32c456da2c43adf7a057c0c4882Mike Lockwood * distributed under the License is distributed on an "AS IS" BASIS, 1216864bae0f51c32c456da2c43adf7a057c0c4882Mike Lockwood * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 1316864bae0f51c32c456da2c43adf7a057c0c4882Mike Lockwood * See the License for the specific language governing permissions and 1416864bae0f51c32c456da2c43adf7a057c0c4882Mike Lockwood * limitations under the License. 1516864bae0f51c32c456da2c43adf7a057c0c4882Mike Lockwood */ 1616864bae0f51c32c456da2c43adf7a057c0c4882Mike Lockwood 17b14e588bec4d5e39e61b020b5b575f2ce555d316Mike Lockwood#define LOG_TAG "MtpUtils" 18b14e588bec4d5e39e61b020b5b575f2ce555d316Mike Lockwood 19335dd2be955607f2632eabc25045857f2cc8b674Mike Lockwood#include <stdio.h> 2016864bae0f51c32c456da2c43adf7a057c0c4882Mike Lockwood#include <time.h> 2116864bae0f51c32c456da2c43adf7a057c0c4882Mike Lockwood 2216864bae0f51c32c456da2c43adf7a057c0c4882Mike Lockwood#include "MtpUtils.h" 2316864bae0f51c32c456da2c43adf7a057c0c4882Mike Lockwood 247850ef999740f214a1990a9c090d3f3865d435aaMike Lockwoodnamespace android { 257850ef999740f214a1990a9c090d3f3865d435aaMike Lockwood 2616864bae0f51c32c456da2c43adf7a057c0c4882Mike Lockwood/* 2716864bae0f51c32c456da2c43adf7a057c0c4882Mike LockwoodDateTime strings follow a compatible subset of the definition found in ISO 8601, and 2816864bae0f51c32c456da2c43adf7a057c0c4882Mike Lockwoodtake the form of a Unicode string formatted as: "YYYYMMDDThhmmss.s". In this 2916864bae0f51c32c456da2c43adf7a057c0c4882Mike Lockwoodrepresentation, YYYY shall be replaced by the year, MM replaced by the month (01-12), 3016864bae0f51c32c456da2c43adf7a057c0c4882Mike LockwoodDD replaced by the day (01-31), T is a constant character 'T' delimiting time from date, 3116864bae0f51c32c456da2c43adf7a057c0c4882Mike Lockwoodhh is replaced by the hour (00-23), mm is replaced by the minute (00-59), and ss by the 3216864bae0f51c32c456da2c43adf7a057c0c4882Mike Lockwoodsecond (00-59). The ".s" is optional, and represents tenths of a second. 33d4b473884617987e02155cd1aae9e573e2f79a58Elliott HughesThis is followed by a UTC offset given as "[+-]zzzz" or the literal "Z", meaning UTC. 3416864bae0f51c32c456da2c43adf7a057c0c4882Mike Lockwood*/ 3516864bae0f51c32c456da2c43adf7a057c0c4882Mike Lockwood 3616864bae0f51c32c456da2c43adf7a057c0c4882Mike Lockwoodbool parseDateTime(const char* dateTime, time_t& outSeconds) { 3716864bae0f51c32c456da2c43adf7a057c0c4882Mike Lockwood int year, month, day, hour, minute, second; 3816864bae0f51c32c456da2c43adf7a057c0c4882Mike Lockwood if (sscanf(dateTime, "%04d%02d%02dT%02d%02d%02d", 39d4b473884617987e02155cd1aae9e573e2f79a58Elliott Hughes &year, &month, &day, &hour, &minute, &second) != 6) 4016864bae0f51c32c456da2c43adf7a057c0c4882Mike Lockwood return false; 41d4b473884617987e02155cd1aae9e573e2f79a58Elliott Hughes 4216864bae0f51c32c456da2c43adf7a057c0c4882Mike Lockwood // skip optional tenth of second 43d4b473884617987e02155cd1aae9e573e2f79a58Elliott Hughes const char* tail = dateTime + 15; 44d4b473884617987e02155cd1aae9e573e2f79a58Elliott Hughes if (tail[0] == '.' && tail[1]) tail += 2; 4516864bae0f51c32c456da2c43adf7a057c0c4882Mike Lockwood 46d4b473884617987e02155cd1aae9e573e2f79a58Elliott Hughes // FIXME: "Z" means UTC, but non-"Z" doesn't mean local time. 47d4b473884617987e02155cd1aae9e573e2f79a58Elliott Hughes // It might be that you're in Asia/Seoul on vacation and your Android 48d4b473884617987e02155cd1aae9e573e2f79a58Elliott Hughes // device has noticed this via the network, but your camera was set to 49d4b473884617987e02155cd1aae9e573e2f79a58Elliott Hughes // America/Los_Angeles once when you bought it and doesn't know where 50d4b473884617987e02155cd1aae9e573e2f79a58Elliott Hughes // it is right now, so the camera says "20160106T081700-0800" but we 51d4b473884617987e02155cd1aae9e573e2f79a58Elliott Hughes // just ignore the "-0800" and assume local time which is actually "+0900". 52d4b473884617987e02155cd1aae9e573e2f79a58Elliott Hughes // I think to support this (without switching to Java or using icu4c) 53d4b473884617987e02155cd1aae9e573e2f79a58Elliott Hughes // you'd want to always use timegm(3) and then manually add/subtract 54d4b473884617987e02155cd1aae9e573e2f79a58Elliott Hughes // the UTC offset parsed from the string (taking care of wrapping). 55d4b473884617987e02155cd1aae9e573e2f79a58Elliott Hughes // mktime(3) ignores the tm_gmtoff field, so you can't let it do the work. 56d4b473884617987e02155cd1aae9e573e2f79a58Elliott Hughes bool useUTC = (tail[0] == 'Z'); 5716864bae0f51c32c456da2c43adf7a057c0c4882Mike Lockwood 58d4b473884617987e02155cd1aae9e573e2f79a58Elliott Hughes struct tm tm = {}; 5916864bae0f51c32c456da2c43adf7a057c0c4882Mike Lockwood tm.tm_sec = second; 6016864bae0f51c32c456da2c43adf7a057c0c4882Mike Lockwood tm.tm_min = minute; 6116864bae0f51c32c456da2c43adf7a057c0c4882Mike Lockwood tm.tm_hour = hour; 6216864bae0f51c32c456da2c43adf7a057c0c4882Mike Lockwood tm.tm_mday = day; 63ea1db0a716cc937af5371153b959610baa2c6d52Mike Lockwood tm.tm_mon = month - 1; // mktime uses months in 0 - 11 range 6416864bae0f51c32c456da2c43adf7a057c0c4882Mike Lockwood tm.tm_year = year - 1900; 6516864bae0f51c32c456da2c43adf7a057c0c4882Mike Lockwood tm.tm_isdst = -1; 66d4b473884617987e02155cd1aae9e573e2f79a58Elliott Hughes outSeconds = useUTC ? timegm(&tm) : mktime(&tm); 6716864bae0f51c32c456da2c43adf7a057c0c4882Mike Lockwood 6816864bae0f51c32c456da2c43adf7a057c0c4882Mike Lockwood return true; 6916864bae0f51c32c456da2c43adf7a057c0c4882Mike Lockwood} 7016864bae0f51c32c456da2c43adf7a057c0c4882Mike Lockwood 7116864bae0f51c32c456da2c43adf7a057c0c4882Mike Lockwoodvoid formatDateTime(time_t seconds, char* buffer, int bufferLength) { 7216864bae0f51c32c456da2c43adf7a057c0c4882Mike Lockwood struct tm tm; 7316864bae0f51c32c456da2c43adf7a057c0c4882Mike Lockwood 7416864bae0f51c32c456da2c43adf7a057c0c4882Mike Lockwood localtime_r(&seconds, &tm); 7516864bae0f51c32c456da2c43adf7a057c0c4882Mike Lockwood snprintf(buffer, bufferLength, "%04d%02d%02dT%02d%02d%02d", 76d4b473884617987e02155cd1aae9e573e2f79a58Elliott Hughes tm.tm_year + 1900, 77ea1db0a716cc937af5371153b959610baa2c6d52Mike Lockwood tm.tm_mon + 1, // localtime_r uses months in 0 - 11 range 78ea1db0a716cc937af5371153b959610baa2c6d52Mike Lockwood tm.tm_mday, tm.tm_hour, tm.tm_min, tm.tm_sec); 7916864bae0f51c32c456da2c43adf7a057c0c4882Mike Lockwood} 8016864bae0f51c32c456da2c43adf7a057c0c4882Mike Lockwood 817850ef999740f214a1990a9c090d3f3865d435aaMike Lockwood} // namespace android 82