1 | #!/usr/bin/env python |
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2 | """ WrapperGenerator class to generate model code automatically. |
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3 | """ |
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4 | |
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5 | import os, sys,re |
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6 | import lineparser |
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7 | |
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8 | class WrapperGenerator: |
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9 | """ Python wrapper generator for C models |
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10 | |
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11 | The developer must provide a header file describing |
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12 | the new model. |
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13 | |
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14 | To provide the name of the Python class to be |
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15 | generated, the .h file must contain the following |
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16 | string in the comments: |
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17 | |
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18 | // [PYTHONCLASS] = my_model |
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19 | |
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20 | where my_model must be replaced by the name of the |
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21 | class that you want to import from sans.models. |
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22 | (example: [PYTHONCLASS] = MyModel |
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23 | will create a class MyModel in sans.models.MyModel. |
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24 | It will also create a class CMyModel in |
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25 | sans_extension.c_models.) |
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26 | |
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27 | Also in comments, each parameter of the params |
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28 | dictionary must be declared with a default value |
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29 | in the following way: |
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30 | |
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31 | // [DEFAULT]=param_name=default_value |
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32 | |
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33 | (example: |
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34 | // [DEFAULT]=radius=20.0 |
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35 | ) |
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36 | |
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37 | See cylinder.h for an example. |
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38 | |
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39 | |
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40 | A .c file corresponding to the .h file should also |
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41 | be provided (example: my_model.h, my_model.c). |
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42 | |
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43 | The .h file should define two function definitions. For example, |
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44 | cylinder.h defines the following: |
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45 | |
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46 | /// 1D scattering function |
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47 | double cylinder_analytical_1D(CylinderParameters *pars, double q); |
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48 | |
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49 | /// 2D scattering function |
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50 | double cylinder_analytical_2D(CylinderParameters *pars, double q, double phi); |
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51 | |
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52 | The .c file implements those functions. |
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53 | |
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54 | @author: Mathieu Doucet / UTK |
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55 | @contact: mathieu.doucet@nist.gov |
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56 | """ |
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57 | |
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58 | def __init__(self, filename, output_dir='.', c_wrapper_dir='.'): |
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59 | """ Initialization """ |
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60 | |
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61 | ## Name of .h file to generate wrapper from |
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62 | self.file = filename |
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63 | |
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64 | # Info read from file |
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65 | |
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66 | ## Name of python class to write |
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67 | self.pythonClass = None |
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68 | ## Parser in struct section |
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69 | self.inStruct = False |
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70 | self.foundCPP = False |
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71 | self.inParDefs = False |
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72 | ## Name of struct for the c object |
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73 | self.structName = None |
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74 | ## Dictionary of parameters |
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75 | self.params = {} |
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76 | ## ModelCalculation module flag |
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77 | self.modelCalcFlag = False |
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78 | ## List of default parameters (text) |
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79 | self.default_list = "" |
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80 | ## Dictionary of units |
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81 | self.details = "" |
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82 | ## List of dispersed parameters |
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83 | self.disp_params = [] |
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84 | #model description |
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85 | self.description='' |
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86 | # paramaters for fittable |
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87 | self.fixed= [] |
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88 | # paramaters for non-fittable |
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89 | self.non_fittable= [] |
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90 | ## parameters with orientation |
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91 | self.orientation_params =[] |
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92 | ## parameter with magnetism |
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93 | self.magentic_params = [] |
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94 | # Model category |
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95 | self.category = None |
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96 | # Whether model belongs to multifunc |
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97 | self.is_multifunc = False |
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98 | ## output directory for wrappers |
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99 | self.output_dir = output_dir |
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100 | self.c_wrapper_dir = c_wrapper_dir |
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101 | |
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102 | |
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103 | |
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104 | def __repr__(self): |
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105 | """ Simple output for printing """ |
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106 | |
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107 | rep = "\n Python class: %s\n\n" % self.pythonClass |
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108 | rep += " struc name: %s\n\n" % self.structName |
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109 | rep += " params: %s\n\n" % self.params |
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110 | rep += " description: %s\n\n" % self.description |
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111 | rep += " Fittable parameters: %s\n\n"% self.fixed |
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112 | rep += " Non-Fittable parameters: %s\n\n"% self.non_fittable |
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113 | rep += " Orientation parameters: %s\n\n"% self.orientation_params |
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114 | rep += " Magnetic parameters: %s\n\n"% self.magnetic_params |
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115 | return rep |
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116 | |
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117 | def read(self): |
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118 | """ Reads in the .h file to catch parameters of the wrapper """ |
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119 | |
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120 | # Check if the file is there |
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121 | if not os.path.isfile(self.file): |
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122 | raise ValueError, "File %s is not a regular file" % self.file |
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123 | |
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124 | # Read file |
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125 | f = open(self.file,'r') |
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126 | buf = f.read() |
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127 | |
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128 | self.default_list = "List of default parameters:\n" |
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129 | #lines = string.split(buf,'\n') |
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130 | lines = buf.split('\n') |
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131 | self.details = "## Parameter details [units, min, max]\n" |
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132 | self.details += " self.details = {}\n" |
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133 | |
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134 | #open item in this case Fixed |
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135 | text='text' |
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136 | key2="<%s>"%text.lower() |
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137 | # close an item in this case fixed |
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138 | text='TexT' |
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139 | key3="</%s>"%text.lower() |
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140 | |
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141 | ## Catch fixed parameters |
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142 | key = "[FIXED]" |
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143 | try: |
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144 | self.fixed= lineparser.readhelper(lines, key, |
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145 | key2, key3, file=self.file) |
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146 | except: |
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147 | raise |
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148 | ## Catch non-fittable parameters parameters |
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149 | key = "[NON_FITTABLE_PARAMS]" |
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150 | try: |
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151 | self.non_fittable= lineparser.readhelper(lines, key, key2, |
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152 | key3, file=self.file) |
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153 | except: |
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154 | raise |
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155 | |
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156 | ## Catch parameters with orientation |
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157 | key = "[ORIENTATION_PARAMS]" |
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158 | try: |
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159 | self.orientation_params = lineparser.readhelper(lines, key, |
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160 | key2, key3, file=self.file) |
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161 | except: |
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162 | raise |
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163 | |
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164 | ## Catch parameters with orientation |
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165 | key = "[MAGNETIC_PARAMS]" |
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166 | try: |
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167 | self.magnetic_params = lineparser.readhelper( lines,key, |
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168 | key2,key3, file= self.file) |
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169 | except: |
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170 | raise |
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171 | |
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172 | ## Catch Description |
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173 | key = "[DESCRIPTION]" |
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174 | |
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175 | find_description = False |
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176 | temp="" |
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177 | for line in lines: |
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178 | if line.count(key)>0 : |
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179 | |
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180 | try: |
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181 | find_description= True |
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182 | index = line.index(key) |
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183 | toks = line[index:].split("=",1 ) |
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184 | temp=toks[1].lstrip().rstrip() |
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185 | text='text' |
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186 | key2="<%s>"%text.lower() |
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187 | if re.match(key2,temp)!=None: |
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188 | |
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189 | toks2=temp.split(key2,1) |
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190 | self.description=toks2[1] |
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191 | text='text' |
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192 | key2="</%s>"%text.lower() |
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193 | if re.search(key2,toks2[1])!=None: |
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194 | temp=toks2[1].split(key2,1) |
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195 | self.description=temp[0] |
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196 | break |
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197 | |
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198 | else: |
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199 | self.description=temp |
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200 | break |
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201 | except: |
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202 | raise ValueError, "Could not parse file %s" % self.file |
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203 | elif find_description: |
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204 | text='text' |
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205 | key2="</%s>"%text.lower() |
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206 | if re.search(key2,line)!=None: |
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207 | tok=line.split(key2,1) |
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208 | temp=tok[0].split("//",1) |
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209 | self.description+=tok[1].lstrip().rstrip() |
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210 | break |
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211 | else: |
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212 | if re.search("//",line)!=None: |
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213 | temp=line.split("//",1) |
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214 | self.description+='\n\t\t'+temp[1].lstrip().rstrip() |
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215 | |
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216 | else: |
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217 | self.description+='\n\t\t'+line.lstrip().rstrip() |
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218 | |
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219 | |
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220 | |
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221 | for line in lines: |
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222 | |
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223 | # Catch class name |
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224 | key = "[PYTHONCLASS]" |
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225 | if line.count(key)>0: |
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226 | try: |
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227 | index = line.index(key) |
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228 | toks = line[index:].split("=" ) |
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229 | self.pythonClass = toks[1].lstrip().rstrip() |
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230 | |
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231 | except: |
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232 | raise ValueError, "Could not parse file %s" % self.file |
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233 | |
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234 | key = "[CATEGORY]" |
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235 | if line.count(key)>0: |
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236 | try: |
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237 | index = line.index(key) |
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238 | toks = line[index:].split("=") |
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239 | self.category = toks[1].lstrip().rstrip() |
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240 | |
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241 | except: |
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242 | raise ValueError, "Could not parse file %s" % self.file |
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243 | |
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244 | # is_multifunc |
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245 | key = "[MULTIPLICITY_INFO]" |
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246 | if line.count(key) > 0: |
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247 | self.is_multifunc = True |
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248 | try: |
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249 | index = line.index(key) |
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250 | toks = line[index:].split("=") |
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251 | self.multiplicity_info = toks[1].lstrip().rstrip() |
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252 | except: |
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253 | raise ValueError, "Could not parse file %s" % self.file |
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254 | |
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255 | # Catch struct name |
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256 | # C++ class definition |
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257 | if line.count("class")>0: |
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258 | # We are entering a class definition |
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259 | self.inParDefs = True |
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260 | self.foundCPP = True |
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261 | |
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262 | # Old-Style C struct definition |
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263 | if line.count("typedef struct")>0: |
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264 | # We are entering a struct block |
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265 | self.inParDefs = True |
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266 | self.inStruct = True |
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267 | |
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268 | if self.inParDefs and line.count("}")>0: |
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269 | # We are exiting a struct block |
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270 | self.inParDefs = False |
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271 | |
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272 | if self.inStruct: |
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273 | self.inStruct = False |
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274 | # Catch the name of the struct |
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275 | index = line.index("}") |
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276 | toks = line[index+1:].split(";") |
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277 | # Catch pointer definition |
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278 | toks2 = toks[0].split(',') |
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279 | self.structName = toks2[0].lstrip().rstrip() |
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280 | |
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281 | # Catch struct content |
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282 | key = "[DEFAULT]" |
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283 | if self.inParDefs and line.count(key)>0: |
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284 | # Found a new parameter |
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285 | try: |
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286 | index = line.index(key) |
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287 | toks = line[index:].split("=") |
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288 | toks2 = toks[2].split() |
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289 | val = float(toks2[0]) |
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290 | self.params[toks[1]] = val |
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291 | #self.pythonClass = toks[1].lstrip().rstrip() |
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292 | units = "" |
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293 | if len(toks2) >= 2: |
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294 | units = toks2[1] |
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295 | self.default_list += " %-15s = %s %s\n" % \ |
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296 | (toks[1], val, units) |
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297 | |
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298 | # Check for min and max |
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299 | min = "None" |
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300 | max = "None" |
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301 | if len(toks2) == 4: |
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302 | min = toks2[2] |
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303 | max = toks2[3] |
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304 | |
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305 | self.details += " self.details['%s'] = ['%s', %s, %s]\n" % \ |
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306 | (toks[1].lstrip().rstrip(), units.lstrip().rstrip(), min, max) |
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307 | except: |
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308 | raise ValueError, "Could not parse input file %s \n %s" % \ |
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309 | (self.file, sys.exc_value) |
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310 | |
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311 | |
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312 | # Catch need for numerical calculations |
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313 | key = "CalcParameters calcPars" |
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314 | if line.count(key)>0: |
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315 | self.modelCalcFlag = True |
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316 | |
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317 | # Catch list of dispersed parameters |
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318 | key = "[DISP_PARAMS]" |
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319 | if line.count(key)>0: |
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320 | try: |
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321 | index = line.index(key) |
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322 | toks = line[index:].split("=") |
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323 | list_str = toks[1].lstrip().rstrip() |
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324 | self.disp_params = list_str.split(',') |
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325 | except: |
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326 | raise ValueError, "Could not parse file %s" % self.file |
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327 | |
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328 | def write_c_wrapper(self): |
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329 | """ Writes the C file to create the python extension class |
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330 | The file is written in C[PYTHONCLASS].c |
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331 | """ |
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332 | file_path = os.path.join(self.c_wrapper_dir, |
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333 | "C"+self.pythonClass+'.cpp') |
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334 | file = open(file_path, 'w') |
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335 | |
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336 | template = open(os.path.join(os.path.dirname(__file__), |
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337 | "classTemplate.txt"), 'r') |
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338 | |
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339 | tmp_buf = template.read() |
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340 | #tmp_lines = string.split(tmp_buf,'\n') |
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341 | tmp_lines = tmp_buf.split('\n') |
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342 | |
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343 | for tmp_line in tmp_lines: |
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344 | |
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345 | # Catch class name |
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346 | newline = self.replaceToken(tmp_line, |
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347 | "[PYTHONCLASS]", 'C'+self.pythonClass) |
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348 | #Catch model description |
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349 | #newline = self.replaceToken(tmp_line, |
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350 | # "[DESCRIPTION]", self.description) |
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351 | # Catch C model name |
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352 | newline = self.replaceToken(newline, |
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353 | "[CMODEL]", self.pythonClass) |
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354 | |
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355 | # Catch class name |
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356 | newline = self.replaceToken(newline, |
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357 | "[MODELSTRUCT]", self.structName) |
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358 | |
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359 | # Sort model initialization based on multifunc |
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360 | if(self.is_multifunc): |
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361 | line = "int level = 1;\nPyArg_ParseTuple(args,\"i\",&level);\n" |
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362 | line += "self->model = new " + self.pythonClass + "(level);" |
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363 | else: |
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364 | line = "self->model = new " + self.pythonClass + "();" |
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365 | |
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366 | newline = self.replaceToken(newline,"[INITIALIZE_MODEL]", |
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367 | line) |
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368 | |
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369 | # Dictionary initialization |
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370 | param_str = "// Initialize parameter dictionary\n" |
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371 | for par in self.params: |
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372 | param_str += " PyDict_SetItemString(self->params,\"%s\",Py_BuildValue(\"d\",%10.12f));\n" % \ |
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373 | (par, self.params[par]) |
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374 | |
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375 | if len(self.disp_params)>0: |
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376 | param_str += " // Initialize dispersion / averaging parameter dict\n" |
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377 | param_str += " DispersionVisitor* visitor = new DispersionVisitor();\n" |
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378 | param_str += " PyObject * disp_dict;\n" |
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379 | for par in self.disp_params: |
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380 | par = par.strip() |
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381 | if par == '': |
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382 | continue |
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383 | param_str += " disp_dict = PyDict_New();\n" |
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384 | param_str += " self->model->%s.dispersion->accept_as_source(visitor, self->model->%s.dispersion, disp_dict);\n" % (par, par) |
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385 | param_str += " PyDict_SetItemString(self->dispersion, \"%s\", disp_dict);\n" % par |
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386 | |
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387 | # Initialize dispersion object dictionnary |
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388 | param_str += "\n" |
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389 | |
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390 | |
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391 | newline = self.replaceToken(newline, |
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392 | "[INITDICTIONARY]", param_str) |
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393 | |
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394 | # Read dictionary |
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395 | param_str = " // Reader parameter dictionary\n" |
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396 | for par in self.params: |
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397 | param_str += " self->model->%s = PyFloat_AsDouble( PyDict_GetItemString(self->params, \"%s\") );\n" % \ |
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398 | (par, par) |
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399 | |
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400 | if len(self.disp_params)>0: |
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401 | param_str += " // Read in dispersion parameters\n" |
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402 | param_str += " PyObject* disp_dict;\n" |
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403 | param_str += " DispersionVisitor* visitor = new DispersionVisitor();\n" |
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404 | for par in self.disp_params: |
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405 | par = par.strip() |
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406 | if par == '': |
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407 | continue |
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408 | param_str += " disp_dict = PyDict_GetItemString(self->dispersion, \"%s\");\n" % par |
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409 | param_str += " self->model->%s.dispersion->accept_as_destination(visitor, self->model->%s.dispersion, disp_dict);\n" % (par, par) |
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410 | |
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411 | newline = self.replaceToken(newline, "[READDICTIONARY]", param_str) |
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412 | |
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413 | # Name of .c file |
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414 | #toks = string.split(self.file,'.') |
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415 | basename = os.path.basename(self.file) |
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416 | toks = basename.split('.') |
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417 | newline = self.replaceToken(newline, "[C_FILENAME]", toks[0]) |
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418 | |
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419 | # Include file |
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420 | basename = os.path.basename(self.file) |
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421 | newline = self.replaceToken(newline, |
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422 | "[INCLUDE_FILE]", self.file) |
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423 | if self.foundCPP: |
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424 | newline = self.replaceToken(newline, |
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425 | "[C_INCLUDE_FILE]", "") |
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426 | newline = self.replaceToken(newline, |
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427 | "[CPP_INCLUDE_FILE]", "#include \"%s\"" % basename) |
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428 | else: |
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429 | newline = self.replaceToken(newline, |
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430 | "[C_INCLUDE_FILE]", "#include \"%s\"" % basename) |
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431 | newline = self.replaceToken(newline, |
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432 | "[CPP_INCLUDE_FILE]", "#include \"models.hh\"") |
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433 | |
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434 | # Numerical calcs dealloc |
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435 | dealloc_str = "\n" |
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436 | if self.modelCalcFlag: |
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437 | dealloc_str = " modelcalculations_dealloc(&(self->model_pars.calcPars));\n" |
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438 | newline = self.replaceToken(newline, |
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439 | "[NUMERICAL_DEALLOC]", dealloc_str) |
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440 | |
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441 | # Numerical calcs init |
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442 | init_str = "\n" |
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443 | if self.modelCalcFlag: |
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444 | init_str = " modelcalculations_init(&(self->model_pars.calcPars));\n" |
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445 | newline = self.replaceToken(newline, |
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446 | "[NUMERICAL_INIT]", init_str) |
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447 | |
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448 | # Numerical calcs reset |
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449 | reset_str = "\n" |
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450 | if self.modelCalcFlag: |
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451 | reset_str = "modelcalculations_reset(&(self->model_pars.calcPars));\n" |
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452 | newline = self.replaceToken(newline, |
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453 | "[NUMERICAL_RESET]", reset_str) |
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454 | |
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455 | # Setting dispsertion weights |
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456 | set_weights = " // Ugliness necessary to go from python to C\n" |
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457 | set_weights = " // TODO: refactor this\n" |
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458 | for par in self.disp_params: |
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459 | par = par.strip() |
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460 | if par == '': |
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461 | continue |
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462 | set_weights += " if (!strcmp(par_name, \"%s\")) {\n" % par |
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463 | set_weights += " self->model->%s.dispersion = dispersion;\n" % par |
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464 | set_weights += " } else" |
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465 | newline = self.replaceToken(newline, |
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466 | "[SET_DISPERSION]", set_weights) |
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467 | |
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468 | # Write new line to the wrapper .c file |
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469 | file.write(newline+'\n') |
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470 | |
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471 | |
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472 | file.close() |
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473 | |
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474 | def write_python_wrapper(self): |
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475 | """ Writes the python file to create the python extension class |
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476 | The file is written in ../[PYTHONCLASS].py |
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477 | """ |
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478 | file_path = os.path.join(self.output_dir, self.pythonClass+'.py') |
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479 | file = open(file_path, 'w') |
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480 | template = open(os.path.join(os.path.dirname(__file__), |
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481 | "modelTemplate.txt"), 'r') |
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482 | |
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483 | tmp_buf = template.read() |
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484 | tmp_lines = tmp_buf.split('\n') |
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485 | |
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486 | for tmp_line in tmp_lines: |
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487 | |
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488 | # Catch class name |
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489 | newline = self.replaceToken(tmp_line, |
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490 | "[CPYTHONCLASS]", |
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491 | 'C' + self.pythonClass) |
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492 | |
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493 | # Catch class name |
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494 | newline = self.replaceToken(newline, |
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495 | "[PYTHONCLASS]", self.pythonClass) |
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496 | |
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497 | # Include file |
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498 | newline = self.replaceToken(newline, |
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499 | "[INCLUDE_FILE]", self.file) |
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500 | |
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501 | # Include file |
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502 | newline = self.replaceToken(newline, |
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503 | "[DEFAULT_LIST]", self.default_list) |
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504 | # model description |
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505 | newline = self.replaceToken(newline, |
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506 | "[DESCRIPTION]", self.description) |
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507 | # Parameter details |
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508 | newline = self.replaceToken(newline, |
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509 | "[PAR_DETAILS]", self.details) |
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510 | |
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511 | # Call base constructor |
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512 | if self.is_multifunc: |
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513 | newline = self.replaceToken(newline,"[CALL_CPYTHON_INIT]", |
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514 | 'C' + self.pythonClass + \ |
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515 | ".__init__(self,multfactor)\n\tself.is_multifunc = True") |
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516 | newline = self.replaceToken(newline,"[MULTIPLICITY_INFO]", |
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517 | self.multiplicity_info) |
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518 | else: |
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519 | newline = self.replaceToken(newline,"[CALL_CPYTHON_INIT]", |
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520 | 'C' + self.pythonClass + \ |
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521 | ".__init__(self)\n self.is_multifunc = False") |
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522 | newline = self.replaceToken(newline, |
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523 | "[MULTIPLICITY_INFO]", "None") |
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524 | |
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525 | |
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526 | # fixed list details |
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527 | fixed_str = str(self.fixed) |
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528 | fixed_str = fixed_str.replace(', ', ',\n ') |
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529 | newline = self.replaceToken(newline, "[FIXED]", fixed_str) |
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530 | |
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531 | # non-fittable list details |
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532 | pars_str = str(self.non_fittable) |
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533 | pars_str = pars_str.replace(', ', |
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534 | ',\n ') |
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535 | newline = self.replaceToken(newline, |
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536 | "[NON_FITTABLE_PARAMS]", pars_str) |
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537 | |
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538 | ## parameters with orientation |
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539 | oriented_str = str(self.orientation_params) |
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540 | formatted_endl = ',\n ' |
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541 | oriented_str = oriented_str.replace(', ', formatted_endl) |
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542 | newline = self.replaceToken(newline, |
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543 | "[ORIENTATION_PARAMS]", oriented_str) |
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544 | ## parameters with magnetism |
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545 | newline = self.replaceToken(newline, |
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546 | "[MAGNETIC_PARAMS]", str(self.magnetic_params)) |
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547 | |
---|
548 | if self.category: |
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549 | newline = self.replaceToken(newline, "[CATEGORY]", |
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550 | '"' + self.category + '"') |
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551 | else: |
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552 | newline = self.replaceToken(newline, "[CATEGORY]", |
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553 | "None") |
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554 | |
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555 | |
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556 | |
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557 | # Write new line to the wrapper .c file |
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558 | file.write(newline+'\n') |
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559 | |
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560 | file.close() |
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561 | |
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562 | |
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563 | def replaceToken(self, line, key, value): #pylint: disable-msg=R0201 |
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564 | """ Replace a token in the template file |
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565 | @param line: line of text to inspect |
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566 | @param key: token to look for |
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567 | @param value: string value to replace the token with |
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568 | @return: new string value |
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569 | """ |
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570 | lenkey = len(key) |
---|
571 | newline = line |
---|
572 | |
---|
573 | while newline.count(key)>0: |
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574 | index = newline.index(key) |
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575 | newline = newline[:index]+value+newline[index+lenkey:] |
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576 | |
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577 | return newline |
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578 | |
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579 | def getModelName(self): |
---|
580 | return self.pythonClass |
---|
581 | |
---|
582 | |
---|
583 | |
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584 | # main |
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585 | if __name__ == '__main__': |
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586 | if len(sys.argv)>1: |
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587 | print "Will look for file %s" % sys.argv[1] |
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588 | app = WrapperGenerator(sys.argv[1]) |
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589 | else: |
---|
590 | app = WrapperGenerator("test.h") |
---|
591 | app.read() |
---|
592 | app.write_c_wrapper() |
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593 | app.write_python_wrapper() |
---|
594 | print app |
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595 | |
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596 | # End of file |
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