include/xmlreader/span.hxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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   9  * This file incorporates work covered by the following license notice:
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  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #ifndef INCLUDED_XMLREADER_SPAN_HXX
  21 #define INCLUDED_XMLREADER_SPAN_HXX
  22
  23 #include <sal/config.h>
  24
  25 #include <cstddef>
  26 #include <cstring>
  27
  28 #include <sal/types.h>
  29 #include <xmlreader/detail/xmlreaderdllapi.hxx>
  30
  31 namespace rtl { class OUString; }
  32
  33 namespace xmlreader {
  34
  35 struct SAL_WARN_UNUSED OOO_DLLPUBLIC_XMLREADER Span {
  36     char const * begin;
  37     sal_Int32 length;
  38
  39     Span(): begin(nullptr), length(0) {}
  40         // init length to avoid compiler warnings
  41
  42     Span(char const * theBegin, sal_Int32 theLength):
  43         begin(theBegin), length(theLength) {}
  44
  45     template< std::size_t N > explicit Span(char const (& literal)[N]):
  46         begin(literal), length(N - 1)
  47     {}
  48
  49     void clear() throw() { begin = nullptr; }
  50
  51     bool is() const { return begin != nullptr; }
  52
  53     bool operator==(Span const & text) const {
  54         return length == text.length
  55             && std::memcmp(begin, text.begin, text.length) == 0;
  56     }
  57
  58     bool operator!=(Span const & text) const {
  59         return !(operator==(text));
  60     }
  61
  62     bool equals(char const * textBegin, sal_Int32 textLength) const {
  63         return operator==(Span(textBegin, textLength));
  64     }
  65
  66     template< std::size_t N > bool operator==(char const (& literal)[N])
  67         const
  68     {
  69         return operator==(Span(literal, N - 1));
  70     }
  71
  72     template< std::size_t N > bool operator!=(char const (& literal)[N])
  73         const
  74     {
  75         return operator!=(Span(literal, N - 1));
  76     }
  77
  78     rtl::OUString convertFromUtf8() const;
  79 };
  80
  81 }
  82
  83 #endif
  84
  85 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */