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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