ceph/src/boost/libs/wave/src/cpplexer/re2clex/cpp_re.cpp

   1 /*=============================================================================
   2     Boost.Wave: A Standard compliant C++ preprocessor library
   3
   4     Copyright (c) 2001 Daniel C. Nuffer
   5     Copyright (c) 2001-2012 Hartmut Kaiser.
   6     Distributed under the Boost Software License, Version 1.0. (See accompanying
   7     file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   8
   9     TODO:
  10         It also may be necessary to add $ to identifiers, for asm.
  11         handle errors better.
  12         have some easier way to parse strings instead of files (done)
  13 =============================================================================*/
  14
  15 #define BOOST_WAVE_SOURCE 1
  16
  17 // disable stupid compiler warnings
  18 #include <boost/config/warning_disable.hpp>
  19
  20 #include <ctime>
  21 #include <cstdlib>
  22 #include <cstdio>
  23 #include <cstring>
  24 #include <sys/types.h>
  25 #include <sys/stat.h>
  26 #include <fcntl.h>
  27
  28 #include <boost/wave/wave_config.hpp>          // configuration data
  29
  30 #if defined(BOOST_HAS_UNISTD_H)
  31 #include <unistd.h>
  32 #else
  33 #include <io.h>
  34 #endif
  35
  36 #include <boost/detail/workaround.hpp>
  37
  38 #include <boost/wave/token_ids.hpp>
  39 #include <boost/wave/cpplexer/re2clex/aq.hpp>
  40 #include <boost/wave/cpplexer/re2clex/scanner.hpp>
  41 #include <boost/wave/cpplexer/re2clex/cpp_re.hpp>
  42
  43 // this must occur after all of the includes and before any code appears
  44 #ifdef BOOST_HAS_ABI_HEADERS
  45 #include BOOST_ABI_PREFIX
  46 #endif
  47
  48 ///////////////////////////////////////////////////////////////////////////////
  49 #if defined(BOOST_MSVC)
  50 #pragma warning (disable: 4101)     // 'foo' : unreferenced local variable
  51 #pragma warning (disable: 4102)     // 'foo' : unreferenced label
  52 #endif
  53
  54 ///////////////////////////////////////////////////////////////////////////////
  55 namespace boost {
  56 namespace wave {
  57 namespace cpplexer {
  58 namespace re2clex {
  59
  60 bool is_backslash(uchar *p, uchar *end, int &len)
  61 {
  62     if (*p == '\\') {
  63         len = 1;
  64         return true;
  65     }
  66     else if (*p == '?' && *(p+1) == '?' && (p+2 < end && *(p+2) == '/')) {
  67         len = 3;
  68         return true;
  69     }
  70     return false;
  71 }
  72
  73 ///////////////////////////////////////////////////////////////////////////////
  74 //  Special wrapper class holding the current cursor position
  75 uchar_wrapper::uchar_wrapper (uchar *base_cursor, std::size_t column)
  76     :   base_cursor(base_cursor), column(column)
  77 {}
  78
  79 uchar_wrapper& uchar_wrapper::operator++()
  80 {
  81     ++base_cursor;
  82     ++column;
  83     return *this;
  84 }
  85
  86 uchar_wrapper& uchar_wrapper::operator--()
  87 {
  88     --base_cursor;
  89     --column;
  90     return *this;
  91 }
  92
  93 uchar uchar_wrapper::operator* () const
  94 {
  95     return *base_cursor;
  96 }
  97
  98 uchar_wrapper::operator uchar *() const
  99 {
 100     return base_cursor;
 101 }
 102
 103 std::ptrdiff_t
 104 operator- (uchar_wrapper const& lhs, uchar_wrapper const& rhs)
 105 {
 106     return lhs.base_cursor - rhs.base_cursor;
 107 }
 108
 109 }   // namespace re2clex
 110 }   // namespace cpplexer
 111 }   // namespace wave
 112 }   // namespace boost
 113
 114 // the suffix header occurs after all of the code
 115 #ifdef BOOST_HAS_ABI_HEADERS
 116 #include BOOST_ABI_SUFFIX
 117 #endif
 118