basegfx/source/tools/stringconversiontools.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #include <stringconversiontools.hxx>
  21 #include <rtl/math.hxx>
  22
  23 namespace basegfx
  24 {
  25     namespace internal
  26     {
  27         void skipSpaces(sal_Int32&      io_rPos,
  28                         const OUString& rStr,
  29                         const sal_Int32 nLen)
  30         {
  31             while( io_rPos < nLen &&
  32                     ' ' == rStr[io_rPos] )
  33             {
  34                 ++io_rPos;
  35             }
  36         }
  37
  38         void skipSpacesAndCommas(sal_Int32&      io_rPos,
  39                                  const OUString& rStr,
  40                                  const sal_Int32 nLen)
  41         {
  42             while(io_rPos < nLen
  43                     && (' ' == rStr[io_rPos] || ',' == rStr[io_rPos]))
  44             {
  45                 ++io_rPos;
  46             }
  47         }
  48
  49         bool getDoubleChar(double&         o_fRetval,
  50                            sal_Int32&      io_rPos,
  51                            const OUString& rStr)
  52         {
  53             sal_Unicode aChar( rStr[io_rPos] );
  54             OUStringBuffer sNumberString;
  55
  56             // sign
  57             if('+' == aChar || '-' == aChar)
  58             {
  59                 sNumberString.append(rStr[io_rPos]);
  60                 aChar = rStr[++io_rPos];
  61             }
  62
  63             // numbers before point
  64             while('0' <= aChar && '9' >= aChar)
  65             {
  66                 sNumberString.append(rStr[io_rPos]);
  67                 io_rPos++;
  68                 aChar = io_rPos < rStr.getLength() ? rStr[io_rPos] : 0;
  69             }
  70
  71             // point
  72             if('.' == aChar)
  73             {
  74                 sNumberString.append(rStr[io_rPos]);
  75                 io_rPos++;
  76                 aChar = io_rPos < rStr.getLength() ? rStr[io_rPos] : 0;
  77             }
  78
  79             // numbers after point
  80             while ('0' <= aChar && '9' >= aChar)
  81             {
  82                 sNumberString.append(rStr[io_rPos]);
  83                 io_rPos++;
  84                 aChar = io_rPos < rStr.getLength() ? rStr[io_rPos] : 0;
  85             }
  86
  87             // 'e'
  88             if('e' == aChar || 'E' == aChar)
  89             {
  90                 sNumberString.append(rStr[io_rPos]);
  91                 io_rPos++;
  92                 aChar = io_rPos < rStr.getLength() ? rStr[io_rPos] : 0;
  93
  94                 // sign for 'e'
  95                 if('+' == aChar || '-' == aChar)
  96                 {
  97                     sNumberString.append(rStr[io_rPos]);
  98                     io_rPos++;
  99                     aChar = io_rPos < rStr.getLength() ? rStr[io_rPos] : 0;
 100                 }
 101
 102                 // number for 'e'
 103                 while('0' <= aChar && '9' >= aChar)
 104                 {
 105                     sNumberString.append(rStr[io_rPos]);
 106                     io_rPos++;
 107                     aChar = io_rPos < rStr.getLength() ? rStr[io_rPos] : 0;
 108                 }
 109             }
 110
 111             if(sNumberString.getLength())
 112             {
 113                 rtl_math_ConversionStatus eStatus;
 114                 o_fRetval = ::rtl::math::stringToDouble( sNumberString.makeStringAndClear(),
 115                                                             '.',
 116                                                             ',',
 117                                                             &eStatus,
 118                                                             NULL );
 119                 return ( eStatus == rtl_math_ConversionStatus_Ok );
 120             }
 121
 122             return false;
 123         }
 124
 125         bool importDoubleAndSpaces(double&         o_fRetval,
 126                                    sal_Int32&      io_rPos,
 127                                    const OUString& rStr,
 128                                    const sal_Int32 nLen )
 129         {
 130             if( !getDoubleChar(o_fRetval, io_rPos, rStr) )
 131                 return false;
 132
 133             skipSpacesAndCommas(io_rPos, rStr, nLen);
 134
 135             return true;
 136         }
 137
 138         bool importFlagAndSpaces(sal_Int32&      o_nRetval,
 139                                  sal_Int32&      io_rPos,
 140                                  const OUString& rStr,
 141                                  const sal_Int32 nLen)
 142         {
 143             sal_Unicode aChar( rStr[io_rPos] );
 144
 145             if('0' == aChar)
 146             {
 147                 o_nRetval = 0;
 148                 ++io_rPos;
 149             }
 150             else if ('1' == aChar)
 151             {
 152                 o_nRetval = 1;
 153                 ++io_rPos;
 154             }
 155             else
 156                 return false;
 157
 158             skipSpacesAndCommas(io_rPos, rStr, nLen);
 159
 160             return true;
 161         }
 162
 163         void putNumberCharWithSpace(OUStringBuffer& rStr,
 164                                     double          fValue,
 165                                     double          fOldValue,
 166                                     bool            bUseRelativeCoordinates )
 167         {
 168             if( bUseRelativeCoordinates )
 169                 fValue -= fOldValue;
 170
 171             const sal_Int32 aLen( rStr.getLength() );
 172             if(aLen)
 173             {
 174                 if( isOnNumberChar(rStr[aLen - 1], false, true) &&
 175                     fValue >= 0.0 )
 176                 {
 177                     rStr.append( ' ' );
 178                 }
 179             }
 180
 181             rStr.append(fValue);
 182         }
 183     } // namespace internal
 184 }
 185
 186 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */