summaryrefslogtreecommitdiff
path: root/include/basic/sbxform.hxx
blob: 589f3ec24fd069dafaebea0f830b9b2e70ab6a4b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
/* -*- 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 .
 */

#ifndef _SBXFORM_HXX
#define _SBXFORM_HXX

//====================================================================
// 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"
*/

/*
  There are two possibilities to get the number of digits of a number:

        a) use sprintf()
        b) use log10() and pow() digit
*/
#define _with_sprintf   // use a)

#include <rtl/ustring.hxx>
#include <rtl/ustrbuf.hxx>
#include "basicdllapi.h"

class BASIC_DLLPUBLIC 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 formated
        sFormatStrg : the Format-String, e.g. ###0.0###

       Return value:
        String containing the formatted output
    */
    OUString  BasicFormat( double dNumber, OUString sFormatStrg );
    OUString  BasicFormatNull( OUString sFormatStrg );

    static  sal_Bool isBasicFormat( OUString sFormatStrg );

  private:
    BASIC_DLLPRIVATE inline void ShiftString( OUStringBuffer& sStrg, sal_uInt16 nStartPos );
    BASIC_DLLPRIVATE void   AppendDigit( OUStringBuffer& sStrg, short nDigit );
    BASIC_DLLPRIVATE void   LeftShiftDecimalPoint( OUStringBuffer& sStrg );
    BASIC_DLLPRIVATE void   StrRoundDigit( OUStringBuffer& sStrg, short nPos, sal_Bool& bOverflow );
    BASIC_DLLPRIVATE void   StrRoundDigit( OUStringBuffer& sStrg, short nPos );
    BASIC_DLLPRIVATE void   ParseBack( OUStringBuffer& sStrg, const OUString& sFormatStrg,
                                       short nFormatPos );
#ifdef _with_sprintf
    // Methods for string conversion with sprintf():
    BASIC_DLLPRIVATE void   InitScan( double _dNum );
    BASIC_DLLPRIVATE void   InitExp( double _dNewExp );
    BASIC_DLLPRIVATE short  GetDigitAtPosScan( short nPos, sal_Bool& bFoundFirstDigit );
    BASIC_DLLPRIVATE short  GetDigitAtPosExpScan( double dNewExponent, short nPos,
                                                  sal_Bool& bFoundFirstDigit );
    BASIC_DLLPRIVATE short  GetDigitAtPosExpScan( short nPos, sal_Bool& bFoundFirstDigit );
#else
    // Methods for direct 'calculation' with log10() and pow():
    BASIC_DLLPRIVATE short  GetDigitAtPos( double dNumber, short nPos, double& dNextNumber,
                                           sal_Bool& bFoundFirstDigit );
    BASIC_DLLPRIVATE short  RoundDigit( double dNumber );
#endif
    BASIC_DLLPRIVATE OUString GetPosFormatString( const OUString& sFormatStrg, sal_Bool & bFound );
    BASIC_DLLPRIVATE OUString GetNegFormatString( const OUString& sFormatStrg, sal_Bool & bFound );
    BASIC_DLLPRIVATE OUString Get0FormatString( const OUString& sFormatStrg, sal_Bool & bFound );
    BASIC_DLLPRIVATE OUString GetNullFormatString( const OUString& sFormatStrg, sal_Bool & bFound );
    BASIC_DLLPRIVATE short  AnalyseFormatString( const OUString& sFormatStrg,
                                                 short& nNoOfDigitsLeft, short& nNoOfDigitsRight,
                                                 short& nNoOfOptionalDigitsLeft,
                                                 short& nNoOfExponentDigits,
                                                 short& nNoOfOptionalExponentDigits,
                                                 sal_Bool& bPercent, sal_Bool& bCurrency, sal_Bool& bScientific,
                                                 sal_Bool& bGenerateThousandSeparator,
                                                 short& nMultipleThousandSeparators );
    BASIC_DLLPRIVATE void   ScanFormatString( double dNumber, const OUString& sFormatStrg,
                                              OUString& sReturnStrg, sal_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
};

#endif

/* vim:set shiftwidth=4 softtabstop=4 expandtab: */