1 | // ---------------------------------------------------------------------------- |
2 | // workarounds for gcc < 3.0. |
3 | // ---------------------------------------------------------------------------- |
4 | |
5 | // Copyright Samuel Krempp 2003. Use, modification, and distribution are |
6 | // subject to 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 | // See http://www.boost.org/libs/format for library home page |
10 | |
11 | |
12 | // ---------------------------------------------------------------------------- |
13 | |
14 | // There's a lot to do, the stdlib shipped with gcc prior to 3.x |
15 | // was terribly non-conforming. |
16 | // . defines macros switches |
17 | // . supplies template classes basic_foo<char,Tr> where gcc only supplies foo. |
18 | // i.e : |
19 | // - basic_ios<char, Tr> from ios |
20 | // - basic_ostream<char, Tr> from ostream |
21 | // - basic_srteambuf<char, Tr> from streambuf |
22 | // these can be used transparently. (it obviously does not work for wchar_t) |
23 | // . specialise CompatAlloc and CompatTraits to wrap gcc-2.95's |
24 | // string_char_traits and std::alloc |
25 | |
26 | #if BOOST_WORKAROUND(__GNUC__, < 3) && !defined(__SGI_STL_PORT) && !defined(_STLPORT_VERSION) |
27 | // only for gcc-2.95's native stdlib |
28 | |
29 | #ifndef BOOST_FORMAT_WORKAROUNDS_GCC295_H |
30 | #define BOOST_FORMAT_WORKAROUNDS_GCC295_H |
31 | |
32 | // SGI STL doesnt have <ostream> and others, so we need iostream. |
33 | #include <iostream> |
34 | #define BOOST_FORMAT_OSTREAM_DEFINED |
35 | |
36 | #include <streambuf.h> |
37 | #define BOOST_FORMAT_STREAMBUF_DEFINED |
38 | |
39 | #define BOOST_NO_TEMPLATE_STD_STREAM |
40 | |
41 | #ifndef BOOST_IO_STD |
42 | # define BOOST_IO_STD std:: |
43 | #endif |
44 | |
45 | |
46 | |
47 | // *** |
48 | // gcc's simple classes turned into standard-like template classes : |
49 | |
50 | namespace std { |
51 | |
52 | |
53 | // gcc has string_char_traits, it's incomplete. |
54 | // we declare a std::char_traits, and specialize CompatTraits<..> on it |
55 | // to do what is required |
56 | template<class Ch> |
57 | class char_traits; // no definition here, we will just use it as a tag. |
58 | |
59 | template <class Ch, class Tr> |
60 | class basic_streambuf; |
61 | |
62 | template <class Tr> |
63 | class basic_streambuf<char, Tr> : public streambuf { |
64 | }; |
65 | |
66 | template <class Ch, class Tr=::std::char_traits<Ch> > |
67 | class basic_ios; |
68 | |
69 | template <class Tr> |
70 | class basic_ios<char, Tr> : public ostream { |
71 | public: |
72 | basic_ios(streambuf * p) : ostream(p) {}; |
73 | char fill() const { return ios::fill(); } // gcc returns wchar.. |
74 | char fill(char c) { return ios::fill(c); } // gcc takes wchar.. |
75 | char widen(char c) { return c; } |
76 | char narrow(char c, char def) { return c; } |
77 | basic_ios& copyfmt(const ios& right) { |
78 | fill(right.fill()); |
79 | flags(right.flags() ); |
80 | exceptions(right.exceptions()); |
81 | width(right.width()); |
82 | precision(right.precision()); |
83 | return *this; |
84 | } |
85 | }; |
86 | |
87 | |
88 | typedef ios ios_base; |
89 | |
90 | template <class Ch, class Tr> |
91 | class basic_ostream; |
92 | |
93 | template <class Tr> |
94 | class basic_ostream<char, Tr> : public basic_ios<char, Tr> |
95 | { |
96 | public: |
97 | basic_ostream(streambuf * p) : basic_ios<char,Tr> (p) {} |
98 | }; |
99 | |
100 | } // namespace std |
101 | |
102 | |
103 | namespace boost { |
104 | namespace io { |
105 | |
106 | |
107 | // ** CompatTraits gcc2.95 specialisations ---------------------------- |
108 | template<class Ch> |
109 | class CompatTraits< ::std::string_char_traits<Ch> > |
110 | : public ::std::string_char_traits<Ch> |
111 | { |
112 | public: |
113 | typedef CompatTraits compatible_type; |
114 | |
115 | typedef Ch char_type; |
116 | typedef int int_type; |
117 | typedef ::std::streampos pos_type; |
118 | typedef ::std::streamoff off_type; |
119 | |
120 | static char_type |
121 | to_char_type(const int_type& meta) { |
122 | return static_cast<char_type>(meta); } |
123 | static int_type |
124 | to_int_type(const char_type& ch) { |
125 | return static_cast<int_type>(static_cast<unsigned char>(ch) );} |
126 | static bool |
127 | eq_int_type(const int_type& left, const int_type& right) { |
128 | return left == right; } |
129 | static int_type |
130 | eof() { |
131 | return static_cast<int_type>(EOF); |
132 | } |
133 | static int_type |
134 | not_eof(const int_type& meta) { |
135 | return (meta == eof()) ? 0 : meta; |
136 | } |
137 | }; |
138 | |
139 | template<class Ch> |
140 | class CompatTraits< ::std::char_traits<Ch> > { |
141 | public: |
142 | typedef CompatTraits< ::std::string_char_traits<Ch> > compatible_type; |
143 | }; |
144 | |
145 | // ** CompatAlloc gcc-2.95 specialisations --------------------------- |
146 | template<> |
147 | class CompatAlloc< ::std::alloc> |
148 | { |
149 | public: |
150 | typedef ::std::allocator<char> compatible_type; |
151 | }; |
152 | |
153 | } // N.S. io |
154 | } // N.S. boost |
155 | |
156 | |
157 | |
158 | |
159 | |
160 | #endif // include guard |
161 | |
162 | #endif // if workaround |
163 | |