1 | // Copyright David Abrahams 2001. |
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2 | // Distributed under the Boost Software License, Version 1.0. (See |
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3 | // accompanying file LICENSE_1_0.txt or copy at |
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4 | // http://www.boost.org/LICENSE_1_0.txt) |
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5 | |
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6 | |
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7 | #include <boost/python/def.hpp> |
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8 | #include <boost/python/module.hpp> |
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9 | #include <boost/python/class.hpp> |
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10 | #include <boost/python/lvalue_from_pytype.hpp> |
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11 | #include <boost/python/copy_const_reference.hpp> |
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12 | #include <boost/python/return_value_policy.hpp> |
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13 | #include <boost/python/to_python_converter.hpp> |
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14 | #include <boost/python/errors.hpp> |
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15 | #include <boost/python/manage_new_object.hpp> |
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16 | #include <string.h> |
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17 | #include "simple_type.hpp" |
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18 | #include "complicated.hpp" |
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19 | |
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20 | // Declare some straightforward extension types |
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21 | extern "C" void |
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22 | dealloc(PyObject* self) |
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23 | { |
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24 | PyObject_Del(self); |
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25 | } |
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26 | |
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27 | // Noddy is a type we got from one of the Python sample files |
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28 | struct NoddyObject : PyObject |
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29 | { |
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30 | int x; |
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31 | }; |
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32 | |
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33 | PyTypeObject NoddyType = { |
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34 | PyObject_HEAD_INIT(NULL) |
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35 | 0, |
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36 | "Noddy", |
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37 | sizeof(NoddyObject), |
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38 | 0, |
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39 | dealloc, /*tp_dealloc*/ |
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40 | 0, /*tp_print*/ |
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41 | 0, /*tp_getattr*/ |
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42 | 0, /*tp_setattr*/ |
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43 | 0, /*tp_compare*/ |
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44 | 0, /*tp_repr*/ |
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45 | 0, /*tp_as_number*/ |
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46 | 0, /*tp_as_sequence*/ |
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47 | 0, /*tp_as_mapping*/ |
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48 | 0, /*tp_hash */ |
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49 | }; |
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50 | |
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51 | // Create a Noddy containing 42 |
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52 | PyObject* new_noddy() |
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53 | { |
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54 | NoddyObject* noddy = PyObject_New(NoddyObject, &NoddyType); |
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55 | noddy->x = 42; |
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56 | return (PyObject*)noddy; |
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57 | } |
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58 | |
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59 | // Simple is a wrapper around a struct simple, which just contains a char* |
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60 | struct SimpleObject |
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61 | { |
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62 | PyObject_HEAD |
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63 | simple x; |
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64 | }; |
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65 | |
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66 | struct extract_simple_object |
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67 | { |
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68 | static simple& execute(SimpleObject& o) { return o.x; } |
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69 | }; |
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70 | |
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71 | PyTypeObject SimpleType = { |
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72 | PyObject_HEAD_INIT(NULL) |
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73 | 0, |
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74 | "Simple", |
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75 | sizeof(SimpleObject), |
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76 | 0, |
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77 | dealloc, /*tp_dealloc*/ |
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78 | 0, /*tp_print*/ |
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79 | 0, /*tp_getattr*/ |
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80 | 0, /*tp_setattr*/ |
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81 | 0, /*tp_compare*/ |
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82 | 0, /*tp_repr*/ |
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83 | 0, /*tp_as_number*/ |
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84 | 0, /*tp_as_sequence*/ |
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85 | 0, /*tp_as_mapping*/ |
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86 | 0, /*tp_hash */ |
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87 | }; |
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88 | |
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89 | // Create a Simple containing "hello, world" |
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90 | PyObject* new_simple() |
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91 | { |
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92 | SimpleObject* simple = PyObject_New(SimpleObject, &SimpleType); |
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93 | simple->x.s = "hello, world"; |
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94 | return (PyObject*)simple; |
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95 | } |
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96 | |
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97 | // |
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98 | // Declare some wrappers/unwrappers to test the low-level conversion |
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99 | // mechanism. |
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100 | // |
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101 | using boost::python::to_python_converter; |
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102 | |
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103 | // Wrap a simple by copying it into a Simple |
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104 | struct simple_to_python |
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105 | : to_python_converter<simple, simple_to_python> |
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106 | { |
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107 | static PyObject* convert(simple const& x) |
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108 | { |
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109 | SimpleObject* p = PyObject_New(SimpleObject, &SimpleType); |
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110 | p->x = x; |
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111 | return (PyObject*)p; |
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112 | } |
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113 | }; |
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114 | |
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115 | struct int_from_noddy |
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116 | { |
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117 | static int& execute(NoddyObject& p) |
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118 | { |
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119 | return p.x; |
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120 | } |
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121 | }; |
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122 | |
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123 | // |
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124 | // Some C++ functions to expose to Python |
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125 | // |
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126 | |
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127 | // Returns the length of s's held string |
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128 | int f(simple const& s) |
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129 | { |
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130 | return strlen(s.s); |
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131 | } |
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132 | |
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133 | int f_mutable_ref(simple& s) |
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134 | { |
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135 | return strlen(s.s); |
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136 | } |
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137 | |
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138 | int f_mutable_ptr(simple* s) |
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139 | { |
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140 | return strlen(s->s); |
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141 | } |
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142 | |
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143 | int f_const_ptr(simple const* s) |
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144 | { |
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145 | return strlen(s->s); |
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146 | } |
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147 | |
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148 | int f2(SimpleObject const& s) |
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149 | { |
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150 | return strlen(s.x.s); |
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151 | } |
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152 | |
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153 | // A trivial passthru function for simple objects |
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154 | simple const& g(simple const& x) |
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155 | { |
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156 | return x; |
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157 | } |
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158 | |
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159 | struct A |
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160 | { |
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161 | A() : x(0) {} |
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162 | virtual ~A() {} |
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163 | char const* name() { return "A"; } |
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164 | int x; |
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165 | }; |
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166 | |
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167 | struct B : A |
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168 | { |
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169 | B() : x(1) {} |
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170 | static char const* name(B*) { return "B"; } |
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171 | int x; |
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172 | }; |
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173 | |
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174 | struct C : A |
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175 | { |
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176 | C() : x(2) {} |
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177 | char const* name() { return "C"; } |
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178 | virtual ~C() {} |
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179 | int x; |
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180 | }; |
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181 | |
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182 | struct D : B, C |
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183 | { |
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184 | D() : x(3) {} |
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185 | char const* name() { return "D"; } |
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186 | int x; |
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187 | }; |
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188 | |
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189 | A take_a(A const& a) { return a; } |
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190 | B take_b(B& b) { return b; } |
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191 | C take_c(C* c) { return *c; } |
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192 | D take_d(D* const& d) { return *d; } |
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193 | |
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194 | D take_d_shared_ptr(boost::shared_ptr<D> d) { return *d; } |
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195 | |
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196 | boost::shared_ptr<A> d_factory() { return boost::shared_ptr<B>(new D); } |
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197 | |
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198 | struct Unregistered {}; |
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199 | Unregistered make_unregistered(int) { return Unregistered(); } |
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200 | |
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201 | Unregistered* make_unregistered2(int) { return new Unregistered; } |
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202 | |
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203 | BOOST_PYTHON_MODULE(m1) |
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204 | { |
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205 | using namespace boost::python; |
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206 | using boost::shared_ptr; |
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207 | |
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208 | simple_to_python(); |
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209 | |
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210 | lvalue_from_pytype<int_from_noddy,&NoddyType>(); |
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211 | |
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212 | lvalue_from_pytype< |
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213 | #if !defined(BOOST_MSVC) || BOOST_MSVC > 1300 // doesn't support non-type member pointer parameters |
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214 | extract_member<SimpleObject, simple, &SimpleObject::x> |
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215 | #else |
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216 | extract_simple_object |
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217 | #endif |
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218 | , &SimpleType |
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219 | >(); |
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220 | |
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221 | lvalue_from_pytype<extract_identity<SimpleObject>,&SimpleType>(); |
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222 | |
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223 | def("new_noddy", new_noddy); |
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224 | def("new_simple", new_simple); |
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225 | |
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226 | def("make_unregistered", make_unregistered); |
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227 | def("make_unregistered2", make_unregistered2, return_value_policy<manage_new_object>()); |
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228 | |
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229 | // Expose f() in all its variations |
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230 | def("f", f); |
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231 | def("f_mutable_ref", f_mutable_ref); |
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232 | def("f_mutable_ptr", f_mutable_ptr); |
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233 | def("f_const_ptr", f_const_ptr); |
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234 | |
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235 | def("f2", f2); |
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236 | |
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237 | // Expose g() |
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238 | def("g", g , return_value_policy<copy_const_reference>() |
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239 | ); |
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240 | |
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241 | def("take_a", take_a); |
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242 | def("take_b", take_b); |
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243 | def("take_c", take_c); |
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244 | def("take_d", take_d); |
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245 | |
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246 | |
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247 | def("take_d_shared_ptr", take_d_shared_ptr); |
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248 | def("d_factory", d_factory); |
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249 | |
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250 | class_<A, shared_ptr<A> >("A") |
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251 | .def("name", &A::name) |
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252 | ; |
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253 | |
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254 | // sequence points don't ensure that "A" is constructed before "B" |
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255 | // or "C" below if we make them part of the same chain |
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256 | class_<B,bases<A> >("B") |
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257 | .def("name", &B::name) |
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258 | ; |
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259 | |
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260 | class_<C,bases<A> >("C") |
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261 | .def("name", &C::name) |
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262 | ; |
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263 | |
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264 | class_<D, bases<B,C> >("D") |
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265 | .def("name", &D::name) |
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266 | ; |
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267 | |
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268 | class_<complicated>("complicated", |
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269 | init<simple const&,int>()) |
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270 | .def(init<simple const&>()) |
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271 | .def("get_n", &complicated::get_n) |
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272 | ; |
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273 | } |
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274 | |
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275 | #include "module_tail.cpp" |
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