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 lcl_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 lcl_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 lcl_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             bool separator_seen=false;
  56
  57             if('+' == aChar || '-' == aChar)
  58             {
  59                 sNumberString.append(rStr[io_rPos]);
  60                 aChar = rStr[++io_rPos];
  61             }
  62
  63             while(('0' <= aChar && '9' >= aChar)
  64                      || (!separator_seen && '.' == aChar))
  65             {
  66                 if ('.' == aChar) separator_seen = true;
  67                 sNumberString.append(rStr[io_rPos]);
  68                 io_rPos++;
  69                 aChar = io_rPos < rStr.getLength() ? rStr[io_rPos] : 0;
  70             }
  71
  72             if('e' == aChar || 'E' == aChar)
  73             {
  74                 sNumberString.append(rStr[io_rPos]);
  75                 io_rPos++;
  76                 aChar = io_rPos < rStr.getLength() ? rStr[io_rPos] : 0;
  77
  78                 if('+' == aChar || '-' == aChar)
  79                 {
  80                     sNumberString.append(rStr[io_rPos]);
  81                     io_rPos++;
  82                     aChar = io_rPos < rStr.getLength() ? rStr[io_rPos] : 0;
  83                 }
  84
  85                 while('0' <= aChar && '9' >= aChar)
  86                 {
  87                     sNumberString.append(rStr[io_rPos]);
  88                     io_rPos++;
  89                     aChar = io_rPos < rStr.getLength() ? rStr[io_rPos] : 0;
  90                 }
  91             }
  92
  93             if(sNumberString.getLength())
  94             {
  95                 rtl_math_ConversionStatus eStatus;
  96                 o_fRetval = ::rtl::math::stringToDouble( sNumberString.makeStringAndClear(),
  97                                                             '.',
  98                                                             ',',
  99                                                             &eStatus,
 100                                                             NULL );
 101                 return ( eStatus == rtl_math_ConversionStatus_Ok );
 102             }
 103
 104             return false;
 105         }
 106
 107         bool lcl_importDoubleAndSpaces( double&                 o_fRetval,
 108                                         sal_Int32&              io_rPos,
 109                                         const OUString&  rStr,
 110                                         const sal_Int32         nLen )
 111         {
 112             if( !lcl_getDoubleChar(o_fRetval, io_rPos, rStr) )
 113                 return false;
 114
 115             lcl_skipSpacesAndCommas(io_rPos, rStr, nLen);
 116
 117             return true;
 118         }
 119
 120         bool lcl_importFlagAndSpaces(sal_Int32&         o_nRetval,
 121                                      sal_Int32&         io_rPos,
 122                                      const OUString&    rStr,
 123                                      const sal_Int32    nLen)
 124         {
 125             sal_Unicode aChar( rStr[io_rPos] );
 126
 127             if('0' == aChar)
 128             {
 129                 o_nRetval = 0;
 130                 ++io_rPos;
 131             }
 132             else if ('1' == aChar)
 133             {
 134                 o_nRetval = 1;
 135                 ++io_rPos;
 136             }
 137             else
 138                 return false;
 139
 140             lcl_skipSpacesAndCommas(io_rPos, rStr, nLen);
 141
 142             return true;
 143         }
 144
 145         void lcl_putNumberCharWithSpace( OUStringBuffer& rStr,
 146                                             double              fValue,
 147                                             double              fOldValue,
 148                                             bool                    bUseRelativeCoordinates )
 149         {
 150             if( bUseRelativeCoordinates )
 151                 fValue -= fOldValue;
 152
 153             const sal_Int32 aLen( rStr.getLength() );
 154             if(aLen)
 155             {
 156                 if( lcl_isOnNumberChar(rStr[aLen - 1], false) &&
 157                     fValue >= 0.0 )
 158                 {
 159                     rStr.append( ' ' );
 160                 }
 161             }
 162
 163             lcl_putNumberChar(rStr, fValue);
 164         }
 165
 166     } // namespace internal
 167 }
 168
 169 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */