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