1 /* 2 * Copyright (C) 2010 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #define LOG_TAG "MtpUtils" 18 19 #include <stdio.h> 20 #include <time.h> 21 22 #include <../private/bionic_time.h> /* TODO: switch this code to icu4c! */ 23 24 #include "MtpUtils.h" 25 26 namespace android { 27 28 /* 29 DateTime strings follow a compatible subset of the definition found in ISO 8601, and 30 take the form of a Unicode string formatted as: "YYYYMMDDThhmmss.s". In this 31 representation, YYYY shall be replaced by the year, MM replaced by the month (01-12), 32 DD replaced by the day (01-31), T is a constant character 'T' delimiting time from date, 33 hh is replaced by the hour (00-23), mm is replaced by the minute (00-59), and ss by the 34 second (00-59). The ".s" is optional, and represents tenths of a second. 35 */ 36 37 bool parseDateTime(const char* dateTime, time_t& outSeconds) { 38 int year, month, day, hour, minute, second; 39 struct tm tm; 40 41 if (sscanf(dateTime, "%04d%02d%02dT%02d%02d%02d", 42 &year, &month, &day, &hour, &minute, &second) != 6) 43 return false; 44 const char* tail = dateTime + 15; 45 // skip optional tenth of second 46 if (tail[0] == '.' && tail[1]) 47 tail += 2; 48 //FIXME - support +/-hhmm 49 bool useUTC = (tail[0] == 'Z'); 50 51 // hack to compute timezone 52 time_t dummy; 53 localtime_r(&dummy, &tm); 54 55 tm.tm_sec = second; 56 tm.tm_min = minute; 57 tm.tm_hour = hour; 58 tm.tm_mday = day; 59 tm.tm_mon = month - 1; // mktime uses months in 0 - 11 range 60 tm.tm_year = year - 1900; 61 tm.tm_wday = 0; 62 tm.tm_isdst = -1; 63 if (useUTC) 64 outSeconds = mktime(&tm); 65 else 66 outSeconds = mktime_tz(&tm, tm.tm_zone); 67 68 return true; 69 } 70 71 void formatDateTime(time_t seconds, char* buffer, int bufferLength) { 72 struct tm tm; 73 74 localtime_r(&seconds, &tm); 75 snprintf(buffer, bufferLength, "%04d%02d%02dT%02d%02d%02d", 76 tm.tm_year + 1900, 77 tm.tm_mon + 1, // localtime_r uses months in 0 - 11 range 78 tm.tm_mday, tm.tm_hour, tm.tm_min, tm.tm_sec); 79 } 80 81 } // namespace android 82
