[857] | 1 | // ----------------------------------------------------------------------------
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| 2 | // workarounds for gcc < 3.0.
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| 3 | // ----------------------------------------------------------------------------
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| 4 |
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| 5 | // Copyright Samuel Krempp 2003. Use, modification, and distribution are
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| 6 | // subject to the Boost Software License, Version 1.0. (See accompanying
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| 7 | // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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| 8 |
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| 9 | // See http://www.boost.org/libs/format for library home page
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| 10 |
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| 11 |
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| 12 | // ----------------------------------------------------------------------------
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| 13 |
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| 14 | // There's a lot to do, the stdlib shipped with gcc prior to 3.x
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| 15 | // was terribly non-conforming.
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| 16 | // . defines macros switches
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| 17 | // . supplies template classes basic_foo<char,Tr> where gcc only supplies foo.
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| 18 | // i.e :
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| 19 | // - basic_ios<char, Tr> from ios
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| 20 | // - basic_ostream<char, Tr> from ostream
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| 21 | // - basic_srteambuf<char, Tr> from streambuf
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| 22 | // these can be used transparently. (it obviously does not work for wchar_t)
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| 23 | // . specialise CompatAlloc and CompatTraits to wrap gcc-2.95's
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| 24 | // string_char_traits and std::alloc
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| 25 |
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| 26 | #if BOOST_WORKAROUND(__GNUC__, < 3) && !defined(__SGI_STL_PORT) && !defined(_STLPORT_VERSION)
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| 27 | // only for gcc-2.95's native stdlib
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| 28 |
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| 29 | #ifndef BOOST_FORMAT_WORKAROUNDS_GCC295_H
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| 30 | #define BOOST_FORMAT_WORKAROUNDS_GCC295_H
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| 31 |
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| 32 | // SGI STL doesnt have <ostream> and others, so we need iostream.
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| 33 | #include <iostream>
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| 34 | #define BOOST_FORMAT_OSTREAM_DEFINED
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| 35 |
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| 36 | #include <streambuf.h>
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| 37 | #define BOOST_FORMAT_STREAMBUF_DEFINED
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| 38 |
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| 39 | #define BOOST_NO_TEMPLATE_STD_STREAM
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| 40 |
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| 41 | #ifndef BOOST_IO_STD
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| 42 | # define BOOST_IO_STD std::
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| 43 | #endif
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| 44 |
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| 45 |
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| 46 |
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| 47 | // ***
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| 48 | // gcc's simple classes turned into standard-like template classes :
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| 49 |
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| 50 | namespace std {
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| 51 |
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| 52 |
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| 53 | // gcc has string_char_traits, it's incomplete.
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| 54 | // we declare a std::char_traits, and specialize CompatTraits<..> on it
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| 55 | // to do what is required
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| 56 | template<class Ch>
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| 57 | class char_traits; // no definition here, we will just use it as a tag.
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| 58 |
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| 59 | template <class Ch, class Tr>
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| 60 | class basic_streambuf;
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| 61 |
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| 62 | template <class Tr>
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| 63 | class basic_streambuf<char, Tr> : public streambuf {
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| 64 | };
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| 65 |
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| 66 | template <class Ch, class Tr=::std::char_traits<Ch> >
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| 67 | class basic_ios;
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| 68 |
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| 69 | template <class Tr>
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| 70 | class basic_ios<char, Tr> : public ostream {
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| 71 | public:
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| 72 | basic_ios(streambuf * p) : ostream(p) {};
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| 73 | char fill() const { return ios::fill(); } // gcc returns wchar..
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| 74 | char fill(char c) { return ios::fill(c); } // gcc takes wchar..
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| 75 | char widen(char c) { return c; }
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| 76 | char narrow(char c, char def) { return c; }
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| 77 | basic_ios& copyfmt(const ios& right) {
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| 78 | fill(right.fill());
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| 79 | flags(right.flags() );
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| 80 | exceptions(right.exceptions());
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| 81 | width(right.width());
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| 82 | precision(right.precision());
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| 83 | return *this;
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| 84 | }
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| 85 | };
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| 86 |
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| 87 |
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| 88 | typedef ios ios_base;
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| 89 |
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| 90 | template <class Ch, class Tr>
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| 91 | class basic_ostream;
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| 92 |
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| 93 | template <class Tr>
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| 94 | class basic_ostream<char, Tr> : public basic_ios<char, Tr>
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| 95 | {
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| 96 | public:
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| 97 | basic_ostream(streambuf * p) : basic_ios<char,Tr> (p) {}
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| 98 | };
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| 99 |
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| 100 | } // namespace std
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| 101 |
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| 102 |
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| 103 | namespace boost {
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| 104 | namespace io {
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| 105 |
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| 106 |
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| 107 | // ** CompatTraits gcc2.95 specialisations ----------------------------
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| 108 | template<class Ch>
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| 109 | class CompatTraits< ::std::string_char_traits<Ch> >
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| 110 | : public ::std::string_char_traits<Ch>
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| 111 | {
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| 112 | public:
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| 113 | typedef CompatTraits compatible_type;
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| 114 |
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| 115 | typedef Ch char_type;
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| 116 | typedef int int_type;
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| 117 | typedef ::std::streampos pos_type;
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| 118 | typedef ::std::streamoff off_type;
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| 119 |
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| 120 | static char_type
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| 121 | to_char_type(const int_type& meta) {
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| 122 | return static_cast<char_type>(meta); }
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| 123 | static int_type
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| 124 | to_int_type(const char_type& ch) {
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| 125 | return static_cast<int_type>(static_cast<unsigned char>(ch) );}
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| 126 | static bool
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| 127 | eq_int_type(const int_type& left, const int_type& right) {
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| 128 | return left == right; }
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| 129 | static int_type
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| 130 | eof() {
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| 131 | return static_cast<int_type>(EOF);
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| 132 | }
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| 133 | static int_type
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| 134 | not_eof(const int_type& meta) {
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| 135 | return (meta == eof()) ? 0 : meta;
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| 136 | }
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| 137 | };
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| 138 |
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| 139 | template<class Ch>
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| 140 | class CompatTraits< ::std::char_traits<Ch> > {
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| 141 | public:
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| 142 | typedef CompatTraits< ::std::string_char_traits<Ch> > compatible_type;
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| 143 | };
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| 144 |
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| 145 | // ** CompatAlloc gcc-2.95 specialisations ---------------------------
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| 146 | template<>
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| 147 | class CompatAlloc< ::std::alloc>
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| 148 | {
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| 149 | public:
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| 150 | typedef ::std::allocator<char> compatible_type;
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| 151 | };
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| 152 |
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| 153 | } // N.S. io
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| 154 | } // N.S. boost
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| 155 |
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| 156 |
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| 157 |
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| 158 |
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| 159 |
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| 160 | #endif // include guard
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| 161 |
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| 162 | #endif // if workaround
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