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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,
const OUString& _sOnStrg,
const OUString& _sOffStrg,
const OUString& _sYesStrg,
const OUString& _sNoStrg,
const OUString& _sTrueStrg,
const OUString& _sFalseStrg,
const OUString& _sCurrencyStrg,
const 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( const OUString& sFormatStrg );
static bool isBasicFormat( const OUString& 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( const OUString& sFormatStrg, bool & bFound );
static OUString GetNegFormatString( const OUString& sFormatStrg, bool & bFound );
static OUString Get0FormatString( const OUString& sFormatStrg, bool & bFound );
static OUString GetNullFormatString( const OUString& 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: */
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