1 | #include <Python.h> |
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2 | #include <RpUnits.h> |
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3 | |
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4 | static PyObject *ErrorObject; |
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5 | |
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6 | typedef struct { |
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7 | PyObject_HEAD |
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8 | RpUnits* rp_unit; |
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9 | } RpUnitsObject; |
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10 | |
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11 | // static PyTypeObject RpUnitsObjectType; |
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12 | |
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13 | /* Xxo methods */ |
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14 | /* |
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15 | * moved this below because forward declaration of RpUnitsObjectType |
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16 | * was causing compiler errors ??? |
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17 | * |
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18 | static RpUnitsObject* |
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19 | newRpUnitsObject(PyObject *arg) |
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20 | { |
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21 | RpUnitsObject* self; |
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22 | self = PyObject_New(RpUnitsObject, &RpUnitsObjectType); |
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23 | if (self == NULL) |
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24 | return NULL; |
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25 | self->rp_unit = NULL; |
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26 | return self; |
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27 | } |
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28 | */ |
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29 | |
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30 | static void |
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31 | RpUnitsObject_dealloc(RpUnitsObject *self) |
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32 | { |
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33 | if (self) { |
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34 | if (self->rp_unit){ |
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35 | // cant call this right now because destructor is private |
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36 | // delete(self->rp_unit); |
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37 | } |
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38 | |
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39 | PyObject_Del(self); |
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40 | } |
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41 | } |
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42 | |
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43 | static PyObject* |
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44 | RpUnitsObject_getUnits(RpUnitsObject *self) |
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45 | { |
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46 | PyObject* rv = NULL; |
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47 | |
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48 | if (self->rp_unit){ |
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49 | rv = PyString_FromString(self->rp_unit->getUnits().c_str()); |
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50 | } |
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51 | |
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52 | return rv; |
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53 | } |
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54 | |
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55 | static PyObject* |
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56 | RpUnitsObject_getUnitsName(RpUnitsObject *self) |
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57 | { |
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58 | PyObject* rv = NULL; |
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59 | |
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60 | if (self->rp_unit){ |
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61 | rv = PyString_FromString(self->rp_unit->getUnitsName().c_str()); |
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62 | } |
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63 | |
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64 | return rv; |
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65 | } |
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66 | |
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67 | static PyObject* |
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68 | RpUnitsObject_getExponent(RpUnitsObject *self) |
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69 | { |
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70 | PyObject* rv = NULL; |
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71 | |
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72 | if (self->rp_unit){ |
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73 | rv = PyFloat_FromDouble(self->rp_unit->getExponent()); |
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74 | } |
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75 | |
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76 | return rv; |
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77 | } |
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78 | |
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79 | static PyObject * RpUnitsObject_convert(RpUnitsObject *self, PyObject *args); |
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80 | |
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81 | static PyObject * |
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82 | RpUnitsObject_makeBasis(RpUnitsObject *self, PyObject *args) |
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83 | { |
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84 | PyObject* rv = NULL; |
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85 | double inVal = 0; |
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86 | double outVal = 0; |
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87 | int result = 0; |
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88 | |
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89 | if (PyTuple_Size(args) > 0) { |
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90 | PyArg_ParseTuple(args, "d", &inVal); |
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91 | } |
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92 | else { |
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93 | PyErr_SetString(PyExc_AttributeError, "incorrect input arguments"); |
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94 | return NULL; |
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95 | } |
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96 | |
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97 | if (self->rp_unit){ |
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98 | outVal = self->rp_unit->makeBasis(inVal, &result); |
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99 | if (result) { |
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100 | rv = PyFloat_FromDouble(outVal); |
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101 | } |
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102 | else { |
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103 | PyErr_SetString(PyExc_StandardError, "could not convert to basis"); |
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104 | } |
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105 | } |
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106 | else { |
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107 | PyErr_SetString(PyExc_AttributeError, "rp_unit is NULL"); |
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108 | } |
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109 | |
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110 | return rv; |
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111 | } |
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112 | |
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113 | static PyMethodDef RpUnitsObject_methods[] = { |
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114 | {"getUnits", (PyCFunction)RpUnitsObject_getUnits, METH_NOARGS, |
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115 | "Return the base name of the RpUnitsObject" }, |
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116 | {"getUnitsName", (PyCFunction)RpUnitsObject_getUnitsName, METH_NOARGS, |
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117 | "Return the whole (base and exponent) name of the RpUnitsObject" }, |
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118 | {"getExponent", (PyCFunction)RpUnitsObject_getExponent, METH_NOARGS, |
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119 | "Return the exponent of the RpUnitsObject" }, |
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120 | {"convert", (PyCFunction)RpUnitsObject_convert, METH_VARARGS, |
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121 | "convert a value from one RpUnits Object to another" }, |
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122 | {"makeBasis", (PyCFunction)RpUnitsObject_makeBasis, METH_VARARGS, |
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123 | "return the basis value of the value provided" }, |
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124 | |
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125 | {NULL} /* Sentinel */ |
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126 | }; |
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127 | |
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128 | static PyTypeObject RpUnitsObjectType = { |
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129 | /* The ob_type field must be initialized in the module init function |
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130 | * to be portable to Windows without using C++. */ |
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131 | PyObject_HEAD_INIT(NULL) |
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132 | 0, /*ob_size*/ |
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133 | "RpUnits.RpUnitsObject", /*tp_name*/ |
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134 | sizeof(RpUnitsObject), /*tp_basicsize*/ |
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135 | 0, /*tp_itemsize*/ |
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136 | /* methods */ |
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137 | (destructor)RpUnitsObject_dealloc, /*tp_dealloc*/ |
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138 | 0, /*tp_print*/ |
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139 | 0, /*tp_getattr*/ |
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140 | 0, /*tp_setattr*/ |
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141 | 0, /*tp_compare*/ |
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142 | 0, /*tp_repr*/ |
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143 | 0, /*tp_as_number*/ |
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144 | 0, /*tp_as_sequence*/ |
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145 | 0, /*tp_as_mapping*/ |
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146 | 0, /*tp_hash*/ |
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147 | 0, /*tp_call*/ |
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148 | 0, /*tp_str*/ |
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149 | 0, /*tp_getattro*/ |
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150 | 0, /*tp_setattro*/ |
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151 | 0, /*tp_as_buffer*/ |
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152 | Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, /*tp_flags*/ |
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153 | "RpUnits Object", /*tp_doc*/ |
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154 | 0, /*tp_traverse*/ |
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155 | 0, /*tp_clear*/ |
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156 | 0, /*tp_richcompare*/ |
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157 | 0, /*tp_weaklistoffset*/ |
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158 | 0, /*tp_iter*/ |
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159 | 0, /*tp_iternext*/ |
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160 | RpUnitsObject_methods, /* tp_methods */ |
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161 | 0, /*tp_members*/ |
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162 | 0, /*tp_getset*/ |
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163 | 0, /*tp_base*/ |
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164 | 0, /*tp_dict*/ |
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165 | 0, /*tp_descr_get*/ |
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166 | 0, /*tp_descr_set*/ |
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167 | 0, /*tp_dictoffset*/ |
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168 | 0, /*tp_init*/ |
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169 | 0, /*tp_alloc*/ |
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170 | // RpUnitsObject_new, /*tp_new*/ |
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171 | 0, /*tp_new*/ |
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172 | 0, /*tp_free*/ |
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173 | 0, /*tp_is_gc*/ |
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174 | }; |
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175 | |
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176 | static RpUnitsObject* |
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177 | newRpUnitsObject(PyObject *arg) |
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178 | { |
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179 | RpUnitsObject* self; |
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180 | self = PyObject_New(RpUnitsObject, &RpUnitsObjectType); |
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181 | if (self == NULL) |
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182 | return NULL; |
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183 | self->rp_unit = NULL; |
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184 | return self; |
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185 | } |
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186 | |
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187 | static PyObject * |
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188 | RpUnitsObject_convert(RpUnitsObject *self, PyObject *args) |
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189 | { |
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190 | PyObject* rv = NULL; |
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191 | // PyObject* toUnits = NULL; |
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192 | RpUnitsObject* toUnits = NULL; |
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193 | PyObject* inVal = NULL; |
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194 | PyObject* argList = NULL; |
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195 | PyObject* outVal = NULL; |
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196 | int result = 0; |
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197 | int argTupleSize = PyTuple_Size(args); |
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198 | |
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199 | if (argTupleSize > 0) { |
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200 | PyArg_ParseTuple(args, "O!O", &RpUnitsObjectType, &toUnits, &inVal); |
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201 | argList = PyTuple_New(1); |
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202 | PyTuple_SetItem(argList, 0, inVal); |
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203 | /* |
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204 | * need to make it so user can give any number of variables in arglist |
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205 | * because the new argList is sent to the python conversion fxn where it |
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206 | * will be parsed in python when c++ calls the conv fxn. |
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207 | PyArg_ParseTuple(args, "O!", &RpUnitsObjectType, &toUnits); |
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208 | if (argTupleSize > 1) { |
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209 | argTupleSize--; |
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210 | inVal = PyTuple_New(argTupleSize); |
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211 | while (argTupleSize) |
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212 | inVal = PyTuple_GetSlice(args,0,argTupleSize); |
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213 | } |
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214 | else { |
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215 | // convertion function needs no arguments??? |
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216 | inVal = PyTuple_New(0); |
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217 | } |
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218 | */ |
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219 | } |
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220 | else { |
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221 | PyErr_SetString(PyExc_AttributeError, "Not enough arguments"); |
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222 | return Py_None; |
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223 | } |
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224 | |
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225 | if (self->rp_unit){ |
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226 | outVal = (PyObject*) self->rp_unit->convert(toUnits->rp_unit, |
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227 | // (void*)&inVal, |
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228 | (void*)argList, |
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229 | &result ); |
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230 | if (result) { |
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231 | rv = outVal; |
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232 | } |
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233 | } |
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234 | |
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235 | return rv; |
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236 | } |
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237 | |
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238 | /* --------------------------------------------------------------------- */ |
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239 | |
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240 | PyDoc_STRVAR(RpUnits_define_doc, |
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241 | "define(name, basis) -> RpUnitsObject \n\ |
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242 | \n\ |
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243 | define RpUnits Object where 'name' is the string name of the units \n\ |
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244 | and 'basis' is an RpUnitsObject pointer for the basis of the unit \n\ |
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245 | being created"); |
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246 | |
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247 | static PyObject * |
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248 | RpUnits_define(PyObject *self, PyObject *args) |
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249 | { |
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250 | RpUnitsObject* newRpUnit; |
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251 | RpUnitsObject* basis = NULL; |
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252 | char* unitsName; |
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253 | |
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254 | if (PyTuple_Size(args) > 0) { |
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255 | PyArg_ParseTuple(args, "s|O!", &unitsName, &RpUnitsObjectType,&basis); |
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256 | } |
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257 | else { |
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258 | PyErr_SetString(PyExc_AttributeError, "Not enough arguments"); |
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259 | return Py_None; |
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260 | } |
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261 | |
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262 | newRpUnit = newRpUnitsObject(args); |
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263 | |
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264 | if (newRpUnit == NULL) |
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265 | return NULL; |
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266 | |
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267 | |
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268 | if (basis && basis->rp_unit) { |
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269 | newRpUnit->rp_unit = RpUnits::define(unitsName, basis->rp_unit); |
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270 | } |
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271 | else { |
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272 | newRpUnit->rp_unit = RpUnits::define(unitsName, NULL); |
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273 | } |
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274 | |
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275 | if (newRpUnit->rp_unit == NULL) { |
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276 | // rp_unit was not allocated. |
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277 | RpUnitsObject_dealloc(newRpUnit); |
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278 | PyErr_SetString(PyExc_AttributeError, "allocating rp_unit failed"); |
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279 | return NULL; |
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280 | } |
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281 | |
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282 | return (PyObject *)newRpUnit; |
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283 | } |
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284 | |
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285 | void* PyCallback (void* fxnPtr, void* args) |
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286 | { |
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287 | PyObject* retVal = NULL; |
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288 | |
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289 | if ((PyObject*)fxnPtr != NULL) { |
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290 | /* |
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291 | retVal = PyObject_CallFunctionObjArgs( (PyObject*)fxnPtr, |
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292 | (PyObject*)args, |
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293 | NULL ); |
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294 | */ |
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295 | |
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296 | retVal = PyObject_CallObject((PyObject*)fxnPtr,(PyObject*)args); |
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297 | } |
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298 | |
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299 | return (void*) retVal; |
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300 | |
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301 | } |
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302 | |
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303 | PyDoc_STRVAR(RpUnits_defineConv_doc, |
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304 | "defineConv(fromUnits,toUnits, forwConvFxn, backConvFxn) -> RpUnitsObject\n\ |
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305 | \n\ |
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306 | define RpUnits Object where 'name' is the string name of the units \n\ |
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307 | and 'basis' is an RpUnitsObject pointer for the basis of the unit \n\ |
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308 | being created"); |
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309 | |
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310 | static PyObject * |
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311 | RpUnits_defineConv(PyObject *self, PyObject *args) |
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312 | { |
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313 | RpUnitsObject* fromUnit = NULL; |
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314 | RpUnitsObject* toUnit = NULL; |
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315 | PyObject* forwConvFxnStr = NULL; |
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316 | PyObject* backConvFxnStr = NULL; |
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317 | |
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318 | RpUnitsObject* newRpUnit = NULL; |
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319 | RpUnits* newConv = NULL; |
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320 | |
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321 | if (PyTuple_Size(args) > 0) { |
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322 | PyArg_ParseTuple(args, "O!O!O!O!",&RpUnitsObjectType, &fromUnit, |
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323 | &RpUnitsObjectType, &toUnit, |
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324 | &PyFunction_Type, &forwConvFxnStr, |
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325 | &PyFunction_Type, &backConvFxnStr); |
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326 | } |
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327 | else { |
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328 | PyErr_SetString(PyExc_AttributeError, "incorrect input arguments"); |
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329 | return NULL; |
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330 | } |
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331 | |
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332 | // check to make sure fromUnit and toUnit are populated |
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333 | if ( (fromUnit == NULL) || |
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334 | (toUnit == NULL) ) { |
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335 | PyErr_SetString(PyExc_AttributeError, |
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336 | "could not retrieve fromUnit or toUnit from argument list"); |
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337 | } |
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338 | |
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339 | // check to make sure forwConvFxnStr and backConvFxnStr are populated |
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340 | if ( (forwConvFxnStr == NULL) || (backConvFxnStr == NULL) ) { |
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341 | PyErr_SetString(PyExc_AttributeError, |
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342 | "could not retrieve conversion function argument"); |
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343 | return NULL; |
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344 | } |
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345 | |
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346 | // make sure we get callable functions and non-null RpUnit Objects |
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347 | if ( PyCallable_Check(forwConvFxnStr) && |
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348 | PyCallable_Check(backConvFxnStr) && |
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349 | fromUnit->rp_unit && |
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350 | toUnit->rp_unit) { |
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351 | |
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352 | Py_INCREF(forwConvFxnStr); |
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353 | Py_INCREF(backConvFxnStr); |
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354 | newConv = RpUnits::define( fromUnit->rp_unit, |
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355 | toUnit->rp_unit, |
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356 | PyCallback, |
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357 | (void*)forwConvFxnStr, |
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358 | PyCallback, |
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359 | (void*)backConvFxnStr ); |
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360 | } |
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361 | else { |
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362 | PyErr_SetString(PyExc_AttributeError, |
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363 | "could not retrieve conversion function argument"); |
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364 | return NULL; |
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365 | } |
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366 | |
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367 | if (newConv) { |
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368 | newRpUnit = newRpUnitsObject(args); |
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369 | |
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370 | if (newRpUnit) { |
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371 | newRpUnit->rp_unit = newConv; |
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372 | } |
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373 | } |
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374 | |
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375 | return (PyObject *)newRpUnit; |
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376 | } |
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377 | |
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378 | PyDoc_STRVAR(RpUnits_find_doc, |
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379 | "find(name) -> RpUnitsObject \n\ |
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380 | \n\ |
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381 | search the dictionary of created RpUnits for a unit matching \n\ |
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382 | the string 'name'"); |
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383 | |
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384 | static PyObject * |
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385 | RpUnits_find(PyObject *self, PyObject *args) |
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386 | { |
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387 | char* searchUnits = NULL; |
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388 | RpUnits* foundUnits = NULL; |
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389 | RpUnitsObject* returnUnits = NULL; |
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390 | |
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391 | if (PyTuple_Size(args) > 0) { |
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392 | PyArg_ParseTuple(args, "s", &searchUnits); |
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393 | } |
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394 | else { |
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395 | PyErr_SetString(PyExc_AttributeError, "incorrect input arguments"); |
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396 | return NULL; |
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397 | } |
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398 | |
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399 | foundUnits = RpUnits::find(searchUnits); |
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400 | |
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401 | if (foundUnits) { |
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402 | returnUnits = newRpUnitsObject(args); |
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403 | |
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404 | if (returnUnits == NULL) |
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405 | return NULL; |
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406 | |
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407 | returnUnits->rp_unit = foundUnits; |
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408 | } |
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409 | |
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410 | return (PyObject*) returnUnits; |
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411 | |
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412 | } |
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413 | |
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414 | PyDoc_STRVAR(RpUnits_makeMetric_doc, |
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415 | "makeMetric (newBasis) -> PyInt \n\ |
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416 | \n\ |
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417 | Create the metric extentions and conversion functions for \n\ |
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418 | the unit 'newBasis', thus making it a new basis."); |
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419 | |
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420 | static PyObject* |
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421 | RpUnits_makeMetric(PyObject *self, PyObject *args) |
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422 | { |
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423 | RpUnitsObject* units = NULL; |
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424 | int result = 0; |
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425 | |
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426 | if (PyTuple_Size(args) > 0) { |
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427 | PyArg_ParseTuple(args, "O!", &RpUnitsObjectType, &units); |
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428 | } |
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429 | else { |
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430 | return NULL; |
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431 | } |
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432 | |
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433 | if (units->rp_unit) { |
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434 | result = RpUnits::makeMetric(units->rp_unit); |
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435 | } |
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436 | |
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437 | return PyInt_FromLong((long)result); |
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438 | } |
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439 | |
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440 | PyDoc_STRVAR(RpUnits_convert_doc, |
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441 | "convert (fromVal, to, units) -> PyString \n\ |
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442 | \n\ |
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443 | Convert the value 'fromVal', to the units listed in 'to', \n\ |
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444 | and return the value as a string. The string 'fromVal' must have a \n\ |
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445 | numeric value with units attached to the end. If 'units' is set to \n\ |
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446 | 'off' then the returned string will not have units. The default \n\ |
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447 | behavior is to show units."); |
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448 | |
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449 | static PyObject* |
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450 | RpUnits_convert(PyObject *self, PyObject *args, PyObject *keywds) |
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451 | { |
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452 | // RpUnitsObject* units = NULL; |
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453 | char* fromVal = NULL; |
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454 | char* to = NULL; |
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455 | char* units = NULL; |
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456 | std::string fromVal_S = ""; |
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457 | std::string to_S = ""; |
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458 | std::string tmpUnits_S = ""; |
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459 | int unitsVal = 1; |
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460 | int result = 0; |
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461 | std::string retStr = ""; |
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462 | |
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463 | static char *kwlist[] = {"fromVal", "to", "units", NULL}; |
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464 | |
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465 | if (PyTuple_Size(args) > 0) { |
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466 | // PyArg_ParseTuple(args, "ss|s", &fromVal, &to, &units); |
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467 | if (!PyArg_ParseTupleAndKeywords(args, keywds, "ss|s", |
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468 | kwlist, &fromVal, &to, &units)) { |
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469 | return NULL; |
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470 | } |
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471 | } |
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472 | else { |
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473 | return NULL; |
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474 | } |
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475 | |
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476 | fromVal_S = std::string(fromVal); |
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477 | to_S = std::string(to); |
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478 | if (units) { |
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479 | tmpUnits_S = std::string(units); |
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480 | if(tmpUnits_S.compare("off") == 0) { |
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481 | unitsVal = 0; |
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482 | } |
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483 | else { |
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484 | unitsVal = 1; |
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485 | } |
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486 | } |
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487 | |
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488 | retStr = RpUnits::convert(fromVal_S,to_S,unitsVal,&result); |
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489 | |
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490 | if (!retStr.empty()) { |
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491 | |
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492 | } |
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493 | |
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494 | return PyString_FromString(retStr.c_str()); |
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495 | } |
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496 | |
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497 | /* ---------- */ |
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498 | |
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499 | |
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500 | /* List of functions defined in the module */ |
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501 | |
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502 | static PyMethodDef RpUnits_Methods[] = { |
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503 | |
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504 | {"define", RpUnits_define, METH_VARARGS, |
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505 | RpUnits_define_doc}, |
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506 | |
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507 | {"defineConv", RpUnits_defineConv, METH_VARARGS, |
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508 | RpUnits_defineConv_doc}, |
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509 | |
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510 | {"find", RpUnits_find, METH_VARARGS, |
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511 | RpUnits_find_doc}, |
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512 | |
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513 | {"makeMetric", RpUnits_makeMetric, METH_VARARGS, |
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514 | RpUnits_makeMetric_doc}, |
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515 | |
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516 | {"convert", (PyCFunction)RpUnits_convert, METH_VARARGS|METH_KEYWORDS, |
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517 | RpUnits_convert_doc}, |
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518 | |
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519 | {NULL, NULL} /* sentinel */ |
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520 | }; |
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521 | |
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522 | PyDoc_STRVAR(module_doc, "RpUnits Module for Python."); |
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523 | |
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524 | /* Initialization function for the module */ |
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525 | |
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526 | PyMODINIT_FUNC |
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527 | initRpUnits(void) |
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528 | { |
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529 | PyObject *m; |
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530 | |
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531 | /* Finalize the type object including setting type of the new type |
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532 | * object; doing it here is required for portability to Windows |
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533 | * without requiring C++. */ |
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534 | if (PyType_Ready(&RpUnitsObjectType) < 0) |
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535 | return; |
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536 | |
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537 | /* Create the module and add the functions */ |
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538 | m = Py_InitModule3("RpUnits", RpUnits_Methods, module_doc); |
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539 | |
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540 | /* Add some symbolic constants to the module */ |
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541 | if (ErrorObject == NULL) { |
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542 | ErrorObject = PyErr_NewException("RpUnits.error", NULL, NULL); |
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543 | if (ErrorObject == NULL) |
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544 | return; |
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545 | } |
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546 | Py_INCREF(ErrorObject); |
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547 | PyModule_AddObject(m, "error", ErrorObject); |
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548 | |
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549 | |
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550 | // add some standard units definitions and conversions. |
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551 | |
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552 | RpUnits::addPresets("all"); |
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553 | |
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554 | |
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555 | } |
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