include/xmlreader/span.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  * 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 #pragma once
  21
  22 #include <sal/config.h>
  23
  24 #include <cstddef>
  25 #include <cstring>
  26
  27 #include <sal/types.h>
  28 #include <xmlreader/detail/xmlreaderdllapi.hxx>
  29
  30 namespace rtl { class OUString; }
  31
  32 namespace xmlreader {
  33
  34 struct SAL_WARN_UNUSED OOO_DLLPUBLIC_XMLREADER Span {
  35     char const * begin;
  36     sal_Int32 length;
  37
  38     Span(): begin(nullptr), length(0) {}
  39         // init length to avoid compiler warnings
  40
  41     Span(char const * theBegin, sal_Int32 theLength):
  42         begin(theBegin), length(theLength) {}
  43
  44     template< std::size_t N > explicit Span(char const (& literal)[N]):
  45         begin(literal), length(N - 1)
  46     {}
  47
  48     void clear() noexcept { begin = nullptr; }
  49
  50     bool is() const { return begin != nullptr; }
  51
  52     bool operator==(Span const & text) const {
  53         return length == text.length
  54             && std::memcmp(begin, text.begin, text.length) == 0;
  55     }
  56
  57     bool operator!=(Span const & text) const {
  58         return !(operator==(text));
  59     }
  60
  61     bool equals(char const * textBegin, sal_Int32 textLength) const {
  62         return operator==(Span(textBegin, textLength));
  63     }
  64
  65     template< std::size_t N > bool operator==(char const (& literal)[N])
  66         const
  67     {
  68         return operator==(Span(literal, N - 1));
  69     }
  70
  71     template< std::size_t N > bool operator!=(char const (& literal)[N])
  72         const
  73     {
  74         return operator!=(Span(literal, N - 1));
  75     }
  76
  77     rtl::OUString convertFromUtf8() const;
  78 };
  79
  80 }
  81
  82 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */