vcl/inc/graphic/DetectorTools.hxx

   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  */
  10
  11 #pragma once
  12
  13 #include <rtl/string.hxx>
  14
  15 #include <vector>
  16
  17 namespace vcl
  18 {
  19 const char* matchArray(const char* pSource, sal_Int32 nSourceSize, const char* pSearch,
  20                        sal_Int32 nSearchSize)
  21 {
  22     for (sal_Int32 increment = 0; increment <= (nSourceSize - nSearchSize); ++increment)
  23     {
  24         bool bMatch = true;
  25         // search both arrays if they match
  26         for (sal_Int32 index = 0; index < nSearchSize && bMatch; ++index)
  27         {
  28             if (pSource[index] != pSearch[index])
  29                 bMatch = false;
  30         }
  31         // match has been found
  32         if (bMatch)
  33             return pSource;
  34         pSource++;
  35     }
  36     return nullptr;
  37 }
  38
  39 const char* matchArrayWithString(const char* pSource, sal_Int32 nSourceSize, OString const& rString)
  40 {
  41     return matchArray(pSource, nSourceSize, rString.getStr(), rString.getLength());
  42 }
  43
  44 bool checkArrayForMatchingStrings(const char* pSource, sal_Int32 nSourceSize,
  45                                   std::vector<OString> const& rStrings)
  46 {
  47     if (rStrings.empty())
  48         return false;
  49     if (rStrings.size() < 2)
  50         return matchArrayWithString(pSource, nSourceSize, rStrings[0]) != nullptr;
  51
  52     const char* pBegin = pSource;
  53     const char* pCurrent = pSource;
  54     for (OString const& rString : rStrings)
  55     {
  56         sal_Int32 nCurrentSize = nSourceSize - sal_Int32(pCurrent - pBegin);
  57         pCurrent = matchArray(pCurrent, nCurrentSize, rString.getStr(), rString.getLength());
  58         if (pCurrent == nullptr)
  59             return false;
  60     }
  61     return true;
  62 }
  63 }
  64
  65 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */