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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
#include "backends/cloud/iso8601.h"
#include "common/str.h"
namespace {
Common::String getSubstring(const Common::String &s, uint32 beginning, uint32 ending) {
//beginning inclusive, ending exclusive
Common::String result = s;
result.erase(ending);
result.erase(0, beginning);
return result;
}
int find(const char *cstr, uint32 startPosition, char needle) {
const char *res = strchr(cstr + startPosition, needle);
if (res == nullptr) return -1;
return res - cstr;
}
}
namespace Cloud {
namespace ISO8601 {
uint32 convertToTimestamp(const Common::String &iso8601Date) {
//2015-05-12T15:50:38Z
const char *cstr = iso8601Date.c_str();
int firstHyphen = find(cstr, 0, '-');
int secondHyphen = find(cstr, firstHyphen + 1, '-');
int tSeparator = find(cstr, secondHyphen + 1, 'T');
int firstColon = find(cstr, tSeparator + 1, ':');
int secondColon = find(cstr, firstColon + 1, ':');
int zSeparator = find(cstr, secondColon + 1, 'Z');
if (zSeparator == -1) zSeparator = find(cstr, secondColon + 1, '-'); // Box's RFC 3339
//now note '+1' which means if there ever was '-1' result of find(), we still did a valid find() from 0th char
Common::String year = getSubstring(iso8601Date, 0, firstHyphen);
Common::String month = getSubstring(iso8601Date, firstHyphen + 1, secondHyphen);
Common::String day = getSubstring(iso8601Date, secondHyphen + 1, tSeparator);
Common::String hour = getSubstring(iso8601Date, tSeparator + 1, firstColon);
Common::String minute = getSubstring(iso8601Date, firstColon + 1, secondColon);
Common::String second = getSubstring(iso8601Date, secondColon + 1, zSeparator);
//now note only 'ending' argument was not '+1' (which means I could've make that function such that -1 means 'until the end')
int Y = atoi(year.c_str());
int M = atoi(month.c_str());
int D = atoi(day.c_str());
int h = atoi(hour.c_str());
int m = atoi(minute.c_str());
int s = atoi(second.c_str());
//ok, now I compose a timestamp based on my basic perception of time/date
//yeah, I know about leap years and leap seconds and all, but still we don't care there
uint32 days = D - 1;
for (int i = 1970; i < Y; ++i)
if ((i % 4 == 0 && i % 100 != 0) || (i % 400 == 0))
days += 366;
else
days += 365;
int mdays[] = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
for (int i = 1; i < M; ++i) {
days += mdays[i - 1];
if (i == 2)
if ((Y % 4 == 0 && Y % 100 != 0) || (Y % 400 == 0))
days += 1;
}
uint32 hours = days * 24 + h;
uint32 minutes = hours * 60 + m;
return minutes * 60 + s;
}
} // End of namespace ISO8601
} // End of namespace Cloud
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