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+/* -*- 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 .
+ */
+
+#pragma once
+
+
+// Implementation class for Basic command: Format$( d,formatStr )
+
+/*
+ Grammar of format string (a try):
+ -----------------------------------------------
+
+ format_string := {\special_char} general_format | scientific_format {\special_char} {;format_string}
+ general_format := {#[,]}{0[,]}[.{0}{#}]
+ scientific_format := {0}[.{0}{#}](e | E)(+ | -){#}{0}
+
+ percent_char := '%'
+ special_char := \char | + | - | ( | ) | $ | space_char
+ char := all_ascii_chars
+ space_char := ' '
+
+ {} repeated multiple times (incl. zero times)
+ [] exactly one or zero times
+ () parenthesis, e.g. (e | E) means e or E times
+
+ Additional predefined formats for the format string:
+ "General Number"
+ "Currency"
+ "Fixed"
+ "Standard"
+ "Percent"
+ "Scientific"
+ "Yes/No"
+ "True/False"
+ "On/Off"
+
+ Note: invalid format string are ignored just as in VisualBasic, the output is
+ probably 'undefined'. ASCII letters are outputted directly.
+
+ Constraints in VisualBasic:
+ - the exponent (scientific syntax) has a maximum of three digits!
+
+ Constraints of new implementation:
+ - the '+' sign is not allowed as wildcard in the mantissa
+
+ TODO:
+ - Date formatting
+ Wildcards are: 'h', 'm', 's', 'y'
+ predefined String-Constants/Commands:
+ "AMPM", "Long Date", "Long Time"
+*/
+
+#include <rtl/ustring.hxx>
+#include <rtl/ustrbuf.hxx>
+
+class SbxBasicFormater {
+ public:
+ // Constructor takes signs for decimal point, thousand separation sign
+ // and necessary resource strings.
+ SbxBasicFormater( sal_Unicode _cDecPoint, sal_Unicode _cThousandSep,
+ OUString _sOnStrg,
+ OUString _sOffStrg,
+ OUString _sYesStrg,
+ OUString _sNoStrg,
+ OUString _sTrueStrg,
+ OUString _sFalseStrg,
+ OUString _sCurrencyStrg,
+ OUString _sCurrencyFormatStrg );
+
+ /* Basic command: Format$( number,format-string )
+
+ Parameter:
+ dNumber : number to be formatted
+ sFormatStrg : the Format-String, e.g. ###0.0###
+
+ Return value:
+ String containing the formatted output
+ */
+ OUString BasicFormat( double dNumber, const OUString& sFormatStrg );
+ static OUString BasicFormatNull( std::u16string_view sFormatStrg );
+
+ static bool isBasicFormat( std::u16string_view sFormatStrg );
+
+ private:
+ static inline void ShiftString( OUStringBuffer& sStrg, sal_uInt16 nStartPos );
+ static void AppendDigit( OUStringBuffer& sStrg, short nDigit );
+ void LeftShiftDecimalPoint( OUStringBuffer& sStrg );
+ void StrRoundDigit( OUStringBuffer& sStrg, short nPos, bool& bOverflow );
+ void StrRoundDigit( OUStringBuffer& sStrg, short nPos );
+ static void ParseBack( OUStringBuffer& sStrg, std::u16string_view sFormatStrg,
+ short nFormatPos );
+ // Methods for string conversion with sprintf():
+ void InitScan( double _dNum );
+ void InitExp( double _dNewExp );
+ short GetDigitAtPosScan( short nPos, bool& bFoundFirstDigit );
+ short GetDigitAtPosExpScan( double dNewExponent, short nPos,
+ bool& bFoundFirstDigit );
+ short GetDigitAtPosExpScan( short nPos, bool& bFoundFirstDigit );
+ static OUString GetPosFormatString( std::u16string_view sFormatStrg, bool & bFound );
+ static OUString GetNegFormatString( std::u16string_view sFormatStrg, bool & bFound );
+ static OUString Get0FormatString( std::u16string_view sFormatStrg, bool & bFound );
+ static OUString GetNullFormatString( std::u16string_view sFormatStrg, bool & bFound );
+ static void AnalyseFormatString( const OUString& sFormatStrg,
+ short& nNoOfDigitsLeft, short& nNoOfDigitsRight,
+ short& nNoOfOptionalDigitsLeft,
+ short& nNoOfExponentDigits,
+ short& nNoOfOptionalExponentDigits,
+ bool& bPercent, bool& bCurrency, bool& bScientific,
+ bool& bGenerateThousandSeparator,
+ short& nMultipleThousandSeparators );
+ void ScanFormatString( double dNumber, const OUString& sFormatStrg,
+ OUString& sReturnStrg, bool bCreateSign );
+
+ //*** Data ***
+ sal_Unicode cDecPoint; // sign for the decimal point
+ sal_Unicode cThousandSep; // sign for thousand delimiter
+ // Text for output:
+ OUString sOnStrg;
+ OUString sOffStrg;
+ OUString sYesStrg;
+ OUString sNoStrg;
+ OUString sTrueStrg;
+ OUString sFalseStrg;
+ OUString sCurrencyStrg;
+ OUString sCurrencyFormatStrg;
+
+ //*** temporary data for scan loop ***
+
+ // String containing the number in scientific format
+ OUString sSciNumStrg;
+ // String containing the exponent of the number
+ OUString sNumExpStrg;
+ double dNum; // the number that is scanned
+ short nNumExp; // the exponent of the number
+ short nExpExp; // the number of digits in the exponent
+};
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */