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         static 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         static bool getDoubleChar(double&         o_fRetval,
  50                            sal_Int32&      io_rPos,
  51                            const OUString& rStr)
  52         {
  53             sal_Unicode aChar = io_rPos < rStr.getLength() ? rStr[io_rPos] : 0;
  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(aChar == 'e' || aChar == 'E')
  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                 return ( eStatus == rtl_math_ConversionStatus_Ok );
 119             }
 120
 121             return false;
 122         }
 123
 124         bool importDoubleAndSpaces(double&         o_fRetval,
 125                                    sal_Int32&      io_rPos,
 126                                    const OUString& rStr,
 127                                    const sal_Int32 nLen )
 128         {
 129             if( !getDoubleChar(o_fRetval, io_rPos, rStr) )
 130                 return false;
 131
 132             skipSpacesAndCommas(io_rPos, rStr, nLen);
 133
 134             return true;
 135         }
 136
 137         bool importFlagAndSpaces(sal_Int32&      o_nRetval,
 138                                  sal_Int32&      io_rPos,
 139                                  const OUString& rStr,
 140                                  const sal_Int32 nLen)
 141         {
 142             sal_Unicode aChar( rStr[io_rPos] );
 143
 144             if(aChar == '0')
 145             {
 146                 o_nRetval = 0;
 147                 ++io_rPos;
 148             }
 149             else if (aChar == '1')
 150             {
 151                 o_nRetval = 1;
 152                 ++io_rPos;
 153             }
 154             else
 155                 return false;
 156
 157             skipSpacesAndCommas(io_rPos, rStr, nLen);
 158
 159             return true;
 160         }
 161
 162     } // namespace internal
 163 }
 164
 165 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */