internal/slice_error.hh

00001 // -*- c++ -*-
00002 
00003 // Copyright (C) 2009 Ed Rosten (er258@cam.ac.uk)
00004 //
00005 // This file is part of the TooN Library.  This library is free
00006 // software; you can redistribute it and/or modify it under the
00007 // terms of the GNU General Public License as published by the
00008 // Free Software Foundation; either version 2, or (at your option)
00009 // any later version.
00010 
00011 // This library is distributed in the hope that it will be useful,
00012 // but WITHOUT ANY WARRANTY; without even the implied warranty of
00013 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00014 // GNU General Public License for more details.
00015 
00016 // You should have received a copy of the GNU General Public License along
00017 // with this library; see the file COPYING.  If not, write to the Free
00018 // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
00019 // USA.
00020 
00021 // As a special exception, you may use this file as part of a free software
00022 // library without restriction.  Specifically, if other files instantiate
00023 // templates or use macros or inline functions from this file, or you compile
00024 // this file and link it with other files to produce an executable, this
00025 // file does not by itself cause the resulting executable to be covered by
00026 // the GNU General Public License.  This exception does not however
00027 // invalidate any other reasons why the executable file might be covered by
00028 // the GNU General Public License.
00029 
00030 namespace TooN {
00031 
00032 namespace Internal
00033 {
00034     template<bool StaticBad> 
00035     struct BadSlice;
00036 
00037     template<> 
00038     struct BadSlice<0>{
00039         static void check(){}
00040     };
00041 
00042     template<int Size, int Start, int Length> 
00043     struct CheckStaticSlice
00044     {
00045         static void check(int/*size*/)
00046         {
00047             BadSlice<(Start < 0) || (Length < 1) || (Start+Length>Size)>::check();
00048         }
00049     };  
00050     
00051     template<int Start, int Length> struct CheckStaticSlice<-1, Start, Length>{
00052         static void check(int size)
00053         {
00054             BadSlice<(Start < 0) || (Length < 1)>::check();
00055             if(Start + Length > size)
00056             {
00057                 #ifdef TOON_TEST_INTERNALS
00058                     throw Internal::SliceError();
00059                 #elif !defined TOON_NDEBUG_SLICE
00060                     std::cerr << "TooN slice out of range" << std::endl;
00061                     std::abort();
00062                 #endif
00063             }
00064         }
00065     };
00066 
00067     struct CheckDynamicSlice{
00068         static void check(int size, int start, int length){
00069             if(start < 0 || start + length > size)
00070             {
00071                 #ifdef TOON_TEST_INTERNALS
00072                     throw Internal::SliceError();
00073                 #elif !defined TOON_NDEBUG_SLICE
00074                     std::cerr << "TooN slice out of range" << std::endl;
00075                     std::abort();
00076                 #endif
00077             }
00078         }
00079     };
00080 
00081     #ifdef TOON_TEST_INTERNALS
00082         template<bool StaticBad> 
00083         struct BadSlice{
00084             static void check(){
00085                 throw Internal::StaticSliceError();
00086             }
00087         };
00088     #endif
00089 
00090 
00091 
00092 }
00093 
00094 }

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