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Diffstat (limited to 'unotools/source/misc/datetime.cxx')
| -rw-r--r-- | unotools/source/misc/datetime.cxx | 529 |
1 files changed, 529 insertions, 0 deletions
diff --git a/unotools/source/misc/datetime.cxx b/unotools/source/misc/datetime.cxx new file mode 100644 index 000000000..c620307a9 --- /dev/null +++ b/unotools/source/misc/datetime.cxx @@ -0,0 +1,529 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/* + * This file is part of the LibreOffice project. + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. + * + * This file incorporates work covered by the following license notice: + * + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed + * with this work for additional information regarding copyright + * ownership. The ASF licenses this file to you under the Apache + * License, Version 2.0 (the "License"); you may not use this file + * except in compliance with the License. You may obtain a copy of + * the License at http://www.apache.org/licenses/LICENSE-2.0 . + */ + +#include <unotools/datetime.hxx> +#include <unotools/localedatawrapper.hxx> +#include <unotools/syslocale.hxx> +#include <tools/date.hxx> +#include <tools/time.hxx> +#include <tools/datetime.hxx> +#include <rtl/ustrbuf.hxx> +#include <rtl/math.hxx> +#include <osl/diagnose.h> +#include <comphelper/string.hxx> +#include <o3tl/string_view.hxx> +#include <cstddef> +#include <sstream> + +namespace +{ + bool checkAllNumber(std::u16string_view rString) + { + sal_Int32 nPos = 0; + sal_Int32 nLen = rString.size(); + + // skip white space + while( nPos < nLen && ' ' == rString[nPos] ) + nPos++; + + if( nPos < nLen && '-' == rString[nPos] ) + nPos++; + + // get number + while( nPos < nLen && + '0' <= rString[nPos] && + '9' >= rString[nPos] ) + { + nPos++; + } + + return nPos == nLen; + } + + /** convert string to number with optional min and max values */ + bool convertNumber32(sal_Int32& rValue, + std::u16string_view rString, + sal_Int32 /*nMin*/ = -1, sal_Int32 /*nMax*/ = -1) + { + if (!checkAllNumber(rString)) + { + rValue = 0; + return false; + } + + rValue = o3tl::toInt32(rString); + return true; + } + + bool convertNumber64(sal_Int64& rValue, + std::u16string_view rString, + sal_Int64 /*nMin*/ = -1, sal_Int64 /*nMax*/ = -1) + { + if (!checkAllNumber(rString)) + { + rValue = 0; + return false; + } + + rValue = o3tl::toInt64(rString); + return true; + } + + // although the standard calls for fixed-length (zero-padded) tokens + // (in their integer part), we are here liberal and allow shorter tokens + // (when there are separators, else it is ambiguous). + // Note that: + // the token separator is OPTIONAL + // empty string is a valid token! (to recognise hh or hhmm or hh:mm formats) + // returns: success / failure + // in case of failure, no reference argument is changed + // arguments: + // i_str: string to extract token from + // index: index in i_str where to start tokenizing + // after return, start of *next* token (if any) + // if this was the last token, then the value is UNDEFINED + // o_strInt: output; integer part of token + // o_bFraction: output; was there a fractional part? + // o_strFrac: output; fractional part of token + bool impl_getISO8601TimeToken(std::u16string_view i_str, std::size_t &nPos, OUString &resInt, bool &bFraction, OUString &resFrac) + { + bFraction = false; + // all tokens are of length 2 + const std::size_t nEndPos = nPos + 2; + const sal_Unicode c0 = '0'; + const sal_Unicode c9 = '9'; + const sal_Unicode sep = ':'; + for (;nPos < nEndPos && nPos < i_str.size(); ++nPos) + { + const sal_Unicode c = i_str[nPos]; + if (c == sep) + return true; + if (c < c0 || c > c9) + return false; + resInt += OUStringChar(c); + } + if (nPos == 0) + return false; + if (nPos == i_str.size() || i_str[nPos] == sep) + return true; + if (i_str[nPos] == ',' || i_str[nPos] == '.') + { + bFraction = true; + ++nPos; + for (; nPos < i_str.size(); ++nPos) + { + const sal_Unicode c = i_str[nPos]; + if (c == 'Z' || c == '+' || c == '-') + { + --nPos; // we don't want to skip the tz separator + return true; + } + if (c == sep) + // fractional part allowed only in *last* token + return false; + if (c < c0 || c > c9) + return false; + resFrac += OUStringChar(c); + } + OSL_ENSURE(nPos == i_str.size(), "impl_getISO8601TimeToken internal error; expected to be at end of string"); + return true; + } + if (i_str[nPos] == 'Z' || i_str[nPos] == '+' || i_str[nPos] == '-') + { + --nPos; // we don't want to skip the tz separator + return true; + } + else + return false; + } + bool getISO8601TimeToken(std::u16string_view i_str, std::size_t &io_index, OUString &o_strInt, bool &o_bFraction, OUString &o_strFrac) + { + OUString resInt; + OUString resFrac; + bool bFraction = false; + std::size_t index = io_index; + if(!impl_getISO8601TimeToken(i_str, index, resInt, bFraction, resFrac)) + return false; + else + { + io_index = index+1; + o_strInt = resInt; + o_strFrac = resFrac; + o_bFraction = bFraction; + return true; + } + } + bool getISO8601TimeZoneToken(std::u16string_view i_str, std::size_t &io_index, OUString &o_strInt) + { + const sal_Unicode c0 = '0'; + const sal_Unicode c9 = '9'; + const sal_Unicode sep = ':'; + if (i_str[io_index] == 'Z') // UTC timezone indicator + { + ++io_index; + o_strInt = "Z"; + return true; + } + else if (i_str[io_index] == '+' || i_str[io_index] == '-') // other timezones indicator + { + ++io_index; + o_strInt.clear(); + for (; io_index < i_str.size(); ++io_index) + { + const sal_Unicode c = i_str[io_index]; + if ((c < c0 || c > c9) && c != sep) + return false; + o_strInt += OUStringChar(c); + } + return true; + } + else + return false; + } +} + +namespace utl +{ +const LocaleDataWrapper& GetLocaleData() +{ + static SvtSysLocale ourSysLocale; + return ourSysLocale.GetLocaleData(); +} + +DateTime GetDateTime(const css::util::DateTime& _rDT) { return DateTime(_rDT); } + +OUString GetDateTimeString(const css::util::DateTime& _rDT) +{ + // String with date and time information (#i20172#) + DateTime aDT(GetDateTime(_rDT)); + const LocaleDataWrapper& rLoDa = GetLocaleData(); + + return rLoDa.getDate(aDT) + " " + rLoDa.getTime(aDT); +} + +OUString GetDateTimeString(sal_Int32 _nDate, sal_Int32 _nTime) +{ + const LocaleDataWrapper& rLoDa = GetLocaleData(); + + Date aDate(_nDate); + tools::Time aTime(_nTime * tools::Time::nanoPerCenti); + return rLoDa.getDate(aDate) + ", " + rLoDa.getTime(aTime); +} + +OUString GetDateString(const css::util::DateTime& _rDT) +{ + return GetLocaleData().getDate(GetDateTime(_rDT)); +} + +void typeConvert(const Date& _rDate, css::util::Date& _rOut) +{ + _rOut.Day = _rDate.GetDay(); + _rOut.Month = _rDate.GetMonth(); + _rOut.Year = _rDate.GetYear(); +} + +void typeConvert(const css::util::Date& _rDate, Date& _rOut) +{ + _rOut = Date(_rDate.Day, _rDate.Month, _rDate.Year); +} + +void typeConvert(const DateTime& _rDateTime, css::util::DateTime& _rOut) +{ + _rOut.Year = _rDateTime.GetYear(); + _rOut.Month = _rDateTime.GetMonth(); + _rOut.Day = _rDateTime.GetDay(); + _rOut.Hours = _rDateTime.GetHour(); + _rOut.Minutes = _rDateTime.GetMin(); + _rOut.Seconds = _rDateTime.GetSec(); + _rOut.NanoSeconds = _rDateTime.GetNanoSec(); +} + +void typeConvert(const css::util::DateTime& _rDateTime, DateTime& _rOut) +{ + Date aDate(_rDateTime.Day, _rDateTime.Month, _rDateTime.Year); + tools::Time aTime(_rDateTime.Hours, _rDateTime.Minutes, _rDateTime.Seconds, _rDateTime.NanoSeconds); + _rOut = DateTime(aDate, aTime); +} + +OUString toISO8601(const css::util::DateTime& rDateTime) +{ + OUStringBuffer rBuffer(32); + rBuffer.append(static_cast<sal_Int32>(rDateTime.Year)); + rBuffer.append('-'); + if( rDateTime.Month < 10 ) + rBuffer.append('0'); + rBuffer.append(static_cast<sal_Int32>(rDateTime.Month)); + rBuffer.append('-'); + if( rDateTime.Day < 10 ) + rBuffer.append('0'); + rBuffer.append(static_cast<sal_Int32>(rDateTime.Day)); + + if( rDateTime.NanoSeconds != 0 || + rDateTime.Seconds != 0 || + rDateTime.Minutes != 0 || + rDateTime.Hours != 0 ) + { + rBuffer.append('T'); + if( rDateTime.Hours < 10 ) + rBuffer.append('0'); + rBuffer.append(static_cast<sal_Int32>(rDateTime.Hours)); + rBuffer.append(':'); + if( rDateTime.Minutes < 10 ) + rBuffer.append('0'); + rBuffer.append(static_cast<sal_Int32>(rDateTime.Minutes)); + rBuffer.append(':'); + if( rDateTime.Seconds < 10 ) + rBuffer.append('0'); + rBuffer.append(static_cast<sal_Int32>(rDateTime.Seconds)); + if ( rDateTime.NanoSeconds > 0) + { + OSL_ENSURE(rDateTime.NanoSeconds < 1000000000,"NanoSeconds cannot be more than 999 999 999"); + rBuffer.append(','); + std::ostringstream ostr; + ostr.fill('0'); + ostr.width(9); + ostr << rDateTime.NanoSeconds; + rBuffer.append(OUString::createFromAscii(ostr.str().c_str())); + } + } + return rBuffer.makeStringAndClear(); +} + +/** convert ISO8601 DateTime String to util::DateTime */ +bool ISO8601parseDateTime(std::u16string_view rString, css::util::DateTime& rDateTime) +{ + bool bSuccess = true; + + std::u16string_view aDateStr, aTimeStr; + css::util::Date aDate; + css::util::Time aTime; + size_t nPos = rString.find( 'T' ); + if ( nPos != std::u16string_view::npos ) + { + aDateStr = rString.substr( 0, nPos ); + aTimeStr = rString.substr( nPos + 1 ); + } + else + aDateStr = rString; // no separator: only date part + + bSuccess = ISO8601parseDate(aDateStr, aDate); + + if ( bSuccess && !aTimeStr.empty() ) // time is optional + { + bSuccess = ISO8601parseTime(aTimeStr, aTime); + } + + if (bSuccess) + { + rDateTime = css::util::DateTime(aTime.NanoSeconds, aTime.Seconds, aTime.Minutes, aTime.Hours, + aDate.Day, aDate.Month, aDate.Year, false); + } + + return bSuccess; +} + +/** convert ISO8601 Date String to util::Date */ +// TODO: supports only calendar dates YYYY-MM-DD +// MISSING: calendar dates YYYYMMDD YYYY-MM +// year, week date, ordinal date +bool ISO8601parseDate(std::u16string_view aDateStr, css::util::Date& rDate) +{ + const sal_Int32 nDateTokens {comphelper::string::getTokenCount(aDateStr, '-')}; + + if (nDateTokens<1 || nDateTokens>3) + return false; + + sal_Int32 nYear = 1899; + sal_Int32 nMonth = 12; + sal_Int32 nDay = 30; + + sal_Int32 nIdx {0}; + if ( !convertNumber32( nYear, o3tl::getToken(aDateStr, 0, '-', nIdx ), 0, 9999 ) ) + return false; + if ( nDateTokens >= 2 ) + if ( !convertNumber32( nMonth, o3tl::getToken(aDateStr, 0, '-', nIdx ), 0, 12 ) ) + return false; + if ( nDateTokens >= 3 ) + if ( !convertNumber32( nDay, o3tl::getToken(aDateStr, 0, '-', nIdx ), 0, 31 ) ) + return false; + + rDate.Year = static_cast<sal_uInt16>(nYear); + rDate.Month = static_cast<sal_uInt16>(nMonth); + rDate.Day = static_cast<sal_uInt16>(nDay); + + return true; +} + +/** convert ISO8601 Time String to util::Time */ +bool ISO8601parseTime(std::u16string_view aTimeStr, css::util::Time& rTime) +{ + sal_Int32 nHour = 0; + sal_Int32 nMin = 0; + sal_Int32 nSec = 0; + sal_Int32 nNanoSec = 0; + + std::size_t n = 0; + OUString tokInt; + OUString tokFrac; + OUString tokTz; + bool bFrac = false; + // hours + bool bSuccess = getISO8601TimeToken(aTimeStr, n, tokInt, bFrac, tokFrac); + if (!bSuccess) + return false; + + if ( bFrac && n < aTimeStr.size()) + { + // is it junk or the timezone? + bSuccess = getISO8601TimeZoneToken(aTimeStr, n, tokTz); + if (!bSuccess) + return false; + } + bSuccess = convertNumber32( nHour, tokInt, 0, 23 ); + if (!bSuccess) + return false; + + if (bFrac) + { + sal_Int64 fracNumerator; + bSuccess = convertNumber64(fracNumerator, tokFrac); + if ( bSuccess ) + { + double frac = static_cast<double>(fracNumerator) / pow(static_cast<double>(10), static_cast<double>(tokFrac.getLength())); + // minutes + OSL_ENSURE(frac < 1 && frac >= 0, "ISO8601parse internal error frac hours (of hours) not between 0 and 1"); + frac *= 60; + nMin = floor(frac); + frac -= nMin; + // seconds + OSL_ENSURE(frac < 1 && frac >= 0, "ISO8601parse internal error frac minutes (of hours) not between 0 and 1"); + frac *= 60; + nSec = floor(frac); + frac -= nSec; + // nanoseconds + OSL_ENSURE(frac < 1 && frac >= 0, "ISO8601parse internal error frac seconds (of hours) not between 0 and 1"); + frac *= 1000000000; + nNanoSec = ::rtl::math::round(frac); + } + goto end; + } + if(n >= aTimeStr.size()) + goto end; + + // minutes + bSuccess = getISO8601TimeToken(aTimeStr, n, tokInt, bFrac, tokFrac); + if (!bSuccess) + return false; + if ( bFrac && n < aTimeStr.size()) + { + // is it junk or the timezone? + bSuccess = getISO8601TimeZoneToken(aTimeStr, n, tokTz); + if (!bSuccess) + return false; + } + bSuccess = convertNumber32( nMin, tokInt, 0, 59 ); + if (!bSuccess) + return false; + if (bFrac) + { + sal_Int64 fracNumerator; + bSuccess = convertNumber64(fracNumerator, tokFrac); + if ( bSuccess ) + { + double frac = static_cast<double>(fracNumerator) / pow(static_cast<double>(10), static_cast<double>(tokFrac.getLength())); + // seconds + OSL_ENSURE(frac < 1 && frac >= 0, "ISO8601parse internal error frac minutes (of minutes) not between 0 and 1"); + frac *= 60; + nSec = floor(frac); + frac -= nSec; + // nanoseconds + OSL_ENSURE(frac < 1 && frac >= 0, "ISO8601parse internal error frac seconds (of minutes) not between 0 and 1"); + frac *= 1000000000; + nNanoSec = ::rtl::math::round(frac); + } + goto end; + } + if(n >= aTimeStr.size()) + goto end; + + // seconds + bSuccess = getISO8601TimeToken(aTimeStr, n, tokInt, bFrac, tokFrac); + if (!bSuccess) + return false; + if (n < aTimeStr.size()) + { + // is it junk or the timezone? + bSuccess = getISO8601TimeZoneToken(aTimeStr, n, tokTz); + if (!bSuccess) + return false; + } + // max 60 for leap seconds + bSuccess = convertNumber32( nSec, tokInt, 0, 60 ); + if (!bSuccess) + return false; + if (bFrac) + { + sal_Int64 fracNumerator; + bSuccess = convertNumber64(fracNumerator, tokFrac); + if ( bSuccess ) + { + double frac = static_cast<double>(fracNumerator) / pow(static_cast<double>(10), static_cast<double>(tokFrac.getLength())); + // nanoseconds + OSL_ENSURE(frac < 1 && frac >= 0, "ISO8601parse internal error frac seconds (of seconds) not between 0 and 1"); + frac *= 1000000000; + nNanoSec = ::rtl::math::round(frac); + } + goto end; + } + + end: + if (bSuccess) + { + // normalise time + const int secondsOverflow = (nSec == 60) ? 61 : 60; + if (nNanoSec == 1000000000) + { + nNanoSec = 0; + ++nSec; + } + if(nSec == secondsOverflow) + { + nSec = 0; + ++nMin; + } + if(nMin == 60) + { + nMin = 0; + ++nHour; + } + if(!tokTz.isEmpty()) + rTime.IsUTC = (tokTz == "Z"); + + rTime.Hours = static_cast<sal_uInt16>(nHour); + rTime.Minutes = static_cast<sal_uInt16>(nMin); + rTime.Seconds = static_cast<sal_uInt16>(nSec); + rTime.NanoSeconds = nNanoSec; + } + + return bSuccess; +} + +} // namespace utl + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |