1 | // (C) Copyright Jonathan Turkanis 2005.
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2 | // Distributed under the Boost Software License, Version 1.0. (See accompanying
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3 | // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt.)
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4 |
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5 | // See http://www.boost.org/libs/iostreams for documentation.
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6 |
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7 | #ifndef BOOST_IOSTREAMS_FILTER_TEST_HPP_INCLUDED
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8 |
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9 | #if defined(_MSC_VER) && (_MSC_VER >= 1020)
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10 | # pragma once
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11 | #endif
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12 |
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13 | #include <boost/config.hpp> // BOOST_MSVC,put size_t in std.
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14 | #include <boost/detail/workaround.hpp>
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15 | #include <algorithm> // min.
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16 | #include <cstddef> // size_t.
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17 | #if BOOST_WORKAROUND(BOOST_MSVC, <= 1300) || \
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18 | BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x564)) || \
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19 | BOOST_WORKAROUND(__MWERKS__, <= 0x3003) \
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20 | /**/
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21 | # include <cstdlib> // rand.
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22 | #endif
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23 | #include <cstring> // memcpy, strlen.
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24 | #include <iterator>
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25 | #include <string>
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26 | #include <vector>
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27 | #if !BOOST_WORKAROUND(BOOST_MSVC, <= 1300) && \
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28 | !BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x564)) && \
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29 | !BOOST_WORKAROUND(__MWERKS__, <= 0x3003) \
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30 | /**/
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31 | # include <boost/random/linear_congruential.hpp>
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32 | # include <boost/random/uniform_smallint.hpp>
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33 | #endif
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34 | #include <boost/iostreams/categories.hpp>
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35 | #include <boost/iostreams/compose.hpp>
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36 | #include <boost/iostreams/copy.hpp>
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37 | #include <boost/iostreams/detail/adapter/basic_adapter.hpp>
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38 | #include <boost/iostreams/detail/bool_trait_def.hpp>
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39 | #include <boost/iostreams/detail/ios.hpp>
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40 | #include <boost/iostreams/device/array.hpp>
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41 | #include <boost/iostreams/device/back_inserter.hpp>
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42 | #include <boost/iostreams/operations.hpp>
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43 | #include <boost/mpl/bool.hpp>
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44 | #include <boost/type_traits/is_array.hpp>
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45 | #include <boost/type_traits/is_same.hpp>
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46 |
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47 | #undef memcpy
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48 | #undef rand
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49 | #undef strlen
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50 |
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51 | #if defined(BOOST_NO_STDC_NAMESPACE) && !defined(__LIBCOMO__)
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52 | namespace std {
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53 | using ::memcpy;
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54 | using ::strlen;
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55 | #if BOOST_WORKAROUND(BOOST_MSVC, <= 1300) || \
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56 | BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x564)) || \
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57 | BOOST_WORKAROUND(__MWERKS__, <= 0x3003) \
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58 | /**/
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59 | using ::rand;
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60 | #endif
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61 | }
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62 | #endif
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63 |
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64 | namespace boost { namespace iostreams {
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65 |
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66 | BOOST_IOSTREAMS_BOOL_TRAIT_DEF(is_string, std::basic_string, 3)
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67 |
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68 | const std::streamsize default_increment = 5;
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69 |
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70 | #if !BOOST_WORKAROUND(BOOST_MSVC, <= 1300) && \
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71 | !BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x564)) && \
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72 | !BOOST_WORKAROUND(__MWERKS__, <= 0x3003) \
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73 | /**/
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74 | std::streamsize rand(int inc)
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75 | {
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76 | static rand48 random_gen;
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77 | static uniform_smallint<int> random_dist(0, inc);
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78 | return random_dist(random_gen);
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79 | }
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80 | #else
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81 | std::streamsize rand(int inc)
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82 | {
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83 | return (std::rand() * inc + 1) / RAND_MAX;
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84 | }
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85 | #endif
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86 |
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87 | class non_blocking_source {
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88 | public:
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89 | typedef char char_type;
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90 | struct category
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91 | : source_tag,
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92 | peekable_tag
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93 | { };
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94 | explicit non_blocking_source( const std::string& data,
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95 | std::streamsize inc = default_increment )
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96 | : data_(data), inc_(inc), pos_(0)
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97 | { }
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98 | std::streamsize read(char* s, std::streamsize n)
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99 | {
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100 | if (pos_ == static_cast<std::streamsize>(data_.size()))
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101 | return -1;
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102 | std::streamsize avail =
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103 | (std::min) (n, static_cast<std::streamsize>(data_.size() - pos_));
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104 | std::streamsize amt = (std::min) (rand(inc_), avail);
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105 | if (amt)
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106 | std::memcpy(s, data_.c_str() + pos_, amt);
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107 | pos_ += amt;
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108 | return amt;
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109 | }
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110 |
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111 | bool putback(char c)
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112 | {
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113 | if (pos_ > 0) {
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114 | data_[--pos_] = c;
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115 | return true;
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116 | }
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117 | return false;
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118 | }
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119 | private:
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120 | std::string data_;
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121 | std::streamsize inc_, pos_;
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122 | };
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123 |
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124 | class non_blocking_sink : public sink {
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125 | public:
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126 | non_blocking_sink( std::string& dest,
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127 | std::streamsize inc = default_increment )
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128 | : dest_(dest), inc_(inc)
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129 | { }
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130 | std::streamsize write(const char* s, std::streamsize n)
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131 | {
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132 | std::streamsize amt = (std::min) (rand(inc_), n);
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133 | dest_.insert(dest_.end(), s, s + amt);
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134 | return amt;
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135 | }
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136 | private:
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137 | std::string& dest_;
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138 | std::streamsize inc_;
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139 | };
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140 |
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141 | //--------------Definition of test_input_filter-------------------------------//
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142 |
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143 | template<typename Filter>
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144 | bool test_input_filter( Filter filter,
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145 | const std::string& input,
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146 | const std::string& output,
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147 | mpl::true_ )
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148 | {
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149 | for ( int inc = default_increment;
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150 | inc < default_increment * 40;
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151 | inc += default_increment )
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152 | {
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153 | non_blocking_source src(input, inc);
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154 | std::string dest;
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155 | iostreams::copy(compose(filter, src), iostreams::back_inserter(dest));
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156 | if (dest != output)
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157 | return false;
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158 | }
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159 | return true;
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160 | }
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161 |
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162 | template<typename Filter, typename Source1, typename Source2>
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163 | bool test_input_filter( Filter filter,
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164 | const Source1& input,
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165 | const Source2& output,
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166 | mpl::false_ )
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167 | {
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168 | std::string in;
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169 | std::string out;
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170 | iostreams::copy(input, iostreams::back_inserter(in));
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171 | iostreams::copy(output, iostreams::back_inserter(out));
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172 | return test_input_filter(filter, in, out);
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173 | }
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174 |
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175 | template<typename Filter, typename Source1, typename Source2>
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176 | bool test_input_filter( Filter filter,
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177 | const Source1& input,
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178 | const Source2& output )
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179 | {
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180 | // Use tag dispatch to compensate for bad overload resolution.
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181 | return test_input_filter( filter, input, output,
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182 | is_string<Source1>() );
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183 | }
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184 |
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185 | //--------------Definition of test_output_filter------------------------------//
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186 |
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187 | template<typename Filter>
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188 | bool test_output_filter( Filter filter,
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189 | const std::string& input,
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190 | const std::string& output,
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191 | mpl::true_ )
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192 | {
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193 | for ( int inc = default_increment;
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194 | inc < default_increment * 40;
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195 | inc += default_increment )
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196 | {
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197 | array_source src(input.data(), input.data() + input.size());
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198 | std::string dest;
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199 | iostreams::copy(src, compose(filter, non_blocking_sink(dest, inc)));
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200 | if (dest != output )
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201 | return false;
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202 | }
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203 | return true;
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204 | }
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205 |
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206 | template<typename Filter, typename Source1, typename Source2>
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207 | bool test_output_filter( Filter filter,
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208 | const Source1& input,
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209 | const Source2& output,
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210 | mpl::false_ )
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211 | {
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212 | std::string in;
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213 | std::string out;
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214 | iostreams::copy(input, iostreams::back_inserter(in));
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215 | iostreams::copy(output, iostreams::back_inserter(out));
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216 | return test_output_filter(filter, in, out);
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217 | }
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218 |
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219 | template<typename Filter, typename Source1, typename Source2>
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220 | bool test_output_filter( Filter filter,
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221 | const Source1& input,
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222 | const Source2& output )
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223 | {
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224 | // Use tag dispatch to compensate for bad overload resolution.
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225 | return test_output_filter( filter, input, output,
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226 | is_string<Source1>() );
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227 | }
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228 |
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229 | //--------------Definition of test_filter_pair--------------------------------//
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230 |
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231 | template<typename OutputFilter, typename InputFilter>
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232 | bool test_filter_pair( OutputFilter out,
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233 | InputFilter in,
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234 | const std::string& data,
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235 | mpl::true_ )
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236 | {
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237 | for ( int inc = default_increment;
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238 | inc <= default_increment * 40;
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239 | inc += default_increment )
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240 | {
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241 | array_source src(data.data(), data.data() + data.size());
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242 | std::string temp;
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243 | std::string dest;
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244 | iostreams::copy(src, compose(out, non_blocking_sink(temp, inc)));
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245 | iostreams::copy(
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246 | compose(in, non_blocking_source(temp, inc)),
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247 | iostreams::back_inserter(dest)
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248 | );
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249 | if (dest != data)
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250 | return false;
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251 | }
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252 | return true;
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253 | }
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254 |
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255 | template<typename OutputFilter, typename InputFilter, typename Source>
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256 | bool test_filter_pair( OutputFilter out,
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257 | InputFilter in,
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258 | const Source& data,
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259 | mpl::false_ )
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260 | {
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261 | std::string str;
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262 | iostreams::copy(data, iostreams::back_inserter(str));
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263 | return test_filter_pair(out, in, str);
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264 | }
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265 |
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266 | template<typename OutputFilter, typename InputFilter, typename Source>
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267 | bool test_filter_pair( OutputFilter out,
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268 | InputFilter in,
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269 | const Source& data )
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270 | {
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271 | // Use tag dispatch to compensate for bad overload resolution.
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272 | return test_filter_pair(out, in, data, is_string<Source>());
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273 | }
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274 |
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275 | } } // End namespaces iostreams, boost.
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276 |
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277 | #endif // #ifndef BOOST_IOSTREAMS_FILTER_TEST_HPP_INCLUDED
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