[af03ddd] | 1 | #!/usr/bin/env python |
---|
| 2 | """ WrapperGenerator class to generate model code automatically. |
---|
| 3 | """ |
---|
| 4 | |
---|
| 5 | import os, sys |
---|
| 6 | |
---|
| 7 | class WrapperGenerator: |
---|
| 8 | """ Python wrapper generator for C models |
---|
| 9 | |
---|
| 10 | The developer must provide a header file describing |
---|
| 11 | the new model. |
---|
| 12 | |
---|
| 13 | To provide the name of the Python class to be |
---|
| 14 | generated, the .h file must contain the following |
---|
| 15 | string in the comments: |
---|
| 16 | |
---|
| 17 | // [PYTHONCLASS] = my_model |
---|
| 18 | |
---|
| 19 | where my_model must be replaced by the name of the |
---|
| 20 | class that you want to import from sans.models. |
---|
| 21 | (example: [PYTHONCLASS] = MyModel |
---|
| 22 | will create a class MyModel in sans.models.MyModel. |
---|
| 23 | It will also create a class CMyModel in |
---|
| 24 | sans_extension.c_models.) |
---|
| 25 | |
---|
| 26 | Also in comments, each parameter of the params |
---|
| 27 | dictionary must be declared with a default value |
---|
| 28 | in the following way: |
---|
| 29 | |
---|
| 30 | // [DEFAULT]=param_name=default_value |
---|
| 31 | |
---|
| 32 | (example: |
---|
| 33 | // [DEFAULT]=radius=20.0 |
---|
| 34 | ) |
---|
| 35 | |
---|
| 36 | See cylinder.h for an example. |
---|
| 37 | |
---|
| 38 | |
---|
| 39 | A .c file corresponding to the .h file should also |
---|
| 40 | be provided (example: my_model.h, my_model.c). |
---|
| 41 | |
---|
| 42 | The .h file should define two function definitions. For example, |
---|
| 43 | cylinder.h defines the following: |
---|
| 44 | |
---|
| 45 | /// 1D scattering function |
---|
| 46 | double cylinder_analytical_1D(CylinderParameters *pars, double q); |
---|
| 47 | |
---|
| 48 | /// 2D scattering function |
---|
| 49 | double cylinder_analytical_2D(CylinderParameters *pars, double q, double phi); |
---|
| 50 | |
---|
| 51 | The .c file implements those functions. |
---|
| 52 | |
---|
| 53 | @author: Mathieu Doucet / UTK |
---|
| 54 | @contact: mathieu.doucet@nist.gov |
---|
| 55 | """ |
---|
| 56 | |
---|
| 57 | def __init__(self, filename): |
---|
| 58 | """ Initialization """ |
---|
| 59 | |
---|
| 60 | ## Name of .h file to generate wrapper from |
---|
| 61 | self.file = filename |
---|
| 62 | |
---|
| 63 | # Info read from file |
---|
| 64 | |
---|
| 65 | ## Name of python class to write |
---|
| 66 | self.pythonClass = None |
---|
| 67 | ## Parser in struct section |
---|
| 68 | self.inStruct = False |
---|
| 69 | ## Name of struct for the c object |
---|
| 70 | self.structName = None |
---|
| 71 | ## Dictionary of parameters |
---|
| 72 | self.params = {} |
---|
| 73 | ## ModelCalculation module flag |
---|
| 74 | self.modelCalcFlag = False |
---|
| 75 | ## List of default parameters (text) |
---|
| 76 | self.default_list = "" |
---|
| 77 | ## Dictionary of units |
---|
| 78 | self.details = "" |
---|
| 79 | ## List of dispersed parameters |
---|
| 80 | self.disp_params = [] |
---|
| 81 | |
---|
| 82 | def __repr__(self): |
---|
| 83 | """ Simple output for printing """ |
---|
| 84 | |
---|
| 85 | rep = "Python class: %s\n" % self.pythonClass |
---|
| 86 | rep += " struc name: %s\n" % self.structName |
---|
| 87 | rep += " params: %s\n" % self.params |
---|
| 88 | return rep |
---|
| 89 | |
---|
| 90 | def read(self): |
---|
| 91 | """ Reads in the .h file to catch parameters of the wrapper """ |
---|
| 92 | |
---|
| 93 | # Check if the file is there |
---|
| 94 | if not os.path.isfile(self.file): |
---|
| 95 | raise ValueError, "File %s is not a regular file" % self.file |
---|
| 96 | |
---|
| 97 | # Read file |
---|
| 98 | f = open(self.file,'r') |
---|
| 99 | buf = f.read() |
---|
| 100 | |
---|
| 101 | self.default_list = "List of default parameters:\n" |
---|
| 102 | #lines = string.split(buf,'\n') |
---|
| 103 | lines = buf.split('\n') |
---|
| 104 | self.details = "## Parameter details [units, min, max]\n" |
---|
| 105 | self.details += " self.details = {}\n" |
---|
| 106 | for line in lines: |
---|
| 107 | |
---|
| 108 | # Catch class name |
---|
| 109 | key = "[PYTHONCLASS]" |
---|
| 110 | if line.count(key)>0: |
---|
| 111 | try: |
---|
| 112 | index = line.index(key) |
---|
| 113 | #toks = string.split( line[index:], "=" ) |
---|
| 114 | toks = line[index:].split("=" ) |
---|
| 115 | self.pythonClass = toks[1].lstrip().rstrip() |
---|
| 116 | except: |
---|
| 117 | raise ValueError, "Could not parse file %s" % self.file |
---|
| 118 | |
---|
| 119 | # Catch struct name |
---|
| 120 | if line.count("typedef struct")>0: |
---|
| 121 | # We are entering a struct block |
---|
| 122 | self.inStruct = True |
---|
| 123 | |
---|
| 124 | if self.inStruct and line.count("}")>0: |
---|
| 125 | # We are exiting a struct block |
---|
| 126 | self.inStruct = False |
---|
| 127 | |
---|
| 128 | # Catch the name of the struct |
---|
| 129 | index = line.index("}") |
---|
| 130 | #toks = string.split(line[index+1:],";") |
---|
| 131 | toks = line[index+1:].split(";") |
---|
| 132 | # Catch pointer definition |
---|
| 133 | #toks2 = string.split(toks[0],',') |
---|
| 134 | toks2 = toks[0].split(',') |
---|
| 135 | self.structName = toks2[0].lstrip().rstrip() |
---|
| 136 | |
---|
| 137 | # Catch struct content |
---|
| 138 | key = "[DEFAULT]" |
---|
| 139 | if self.inStruct and line.count(key)>0: |
---|
| 140 | # Found a new parameter |
---|
| 141 | try: |
---|
| 142 | index = line.index(key) |
---|
| 143 | toks = line[index:].split("=") |
---|
| 144 | toks2 = toks[2].split() |
---|
| 145 | val = float(toks2[0]) |
---|
| 146 | self.params[toks[1]] = val |
---|
| 147 | #self.pythonClass = toks[1].lstrip().rstrip() |
---|
| 148 | units = "" |
---|
| 149 | if len(toks2) >= 2: |
---|
| 150 | units = toks2[1] |
---|
| 151 | self.default_list += " %-15s = %s %s\n" % \ |
---|
| 152 | (toks[1], val, units) |
---|
| 153 | |
---|
| 154 | # Check for min and max |
---|
| 155 | min = "None" |
---|
| 156 | max = "None" |
---|
| 157 | if len(toks2) == 4: |
---|
| 158 | min = toks2[2] |
---|
| 159 | max = toks2[3] |
---|
| 160 | |
---|
| 161 | self.details += " self.details['%s'] = ['%s', %s, %s]\n" % \ |
---|
| 162 | (toks[1].lstrip().rstrip(), units.lstrip().rstrip(), min, max) |
---|
| 163 | except: |
---|
| 164 | raise ValueError, "Could not parse input file %s \n %s" % \ |
---|
| 165 | (self.file, sys.exc_value) |
---|
| 166 | |
---|
| 167 | |
---|
| 168 | # Catch need for numerical calculations |
---|
| 169 | key = "CalcParameters calcPars" |
---|
| 170 | if line.count(key)>0: |
---|
| 171 | self.modelCalcFlag = True |
---|
| 172 | |
---|
| 173 | # Catch list of dispersed parameters |
---|
| 174 | key = "[DISP_PARAMS]" |
---|
| 175 | if line.count(key)>0: |
---|
| 176 | try: |
---|
| 177 | index = line.index(key) |
---|
| 178 | toks = line[index:].split("=") |
---|
| 179 | list_str = toks[1].lstrip().rstrip() |
---|
| 180 | self.disp_params = list_str.split(',') |
---|
| 181 | except: |
---|
| 182 | raise ValueError, "Could not parse file %s" % self.file |
---|
| 183 | |
---|
| 184 | |
---|
| 185 | |
---|
| 186 | def write_c_wrapper(self): |
---|
| 187 | """ Writes the C file to create the python extension class |
---|
| 188 | The file is written in C[PYTHONCLASS].c |
---|
| 189 | """ |
---|
| 190 | |
---|
| 191 | file = open("C"+self.pythonClass+'.cpp', 'w') |
---|
| 192 | template = open("classTemplate.txt", 'r') |
---|
| 193 | |
---|
| 194 | tmp_buf = template.read() |
---|
| 195 | #tmp_lines = string.split(tmp_buf,'\n') |
---|
| 196 | tmp_lines = tmp_buf.split('\n') |
---|
| 197 | |
---|
| 198 | for tmp_line in tmp_lines: |
---|
| 199 | |
---|
| 200 | # Catch class name |
---|
| 201 | newline = self.replaceToken(tmp_line, |
---|
| 202 | "[PYTHONCLASS]", 'C'+self.pythonClass) |
---|
| 203 | |
---|
| 204 | # Catch C model name |
---|
| 205 | newline = self.replaceToken(newline, |
---|
| 206 | "[CMODEL]", self.pythonClass) |
---|
| 207 | |
---|
| 208 | # Catch class name |
---|
| 209 | newline = self.replaceToken(newline, |
---|
| 210 | "[MODELSTRUCT]", self.structName) |
---|
| 211 | |
---|
| 212 | # Dictionary initialization |
---|
| 213 | param_str = "// Initialize parameter dictionary\n" |
---|
| 214 | for par in self.params: |
---|
[0f5bc9f] | 215 | param_str += " PyDict_SetItemString(self->params,\"%s\",Py_BuildValue(\"d\",%f));\n" % \ |
---|
| 216 | (par, self.params[par]) |
---|
[af03ddd] | 217 | |
---|
| 218 | param_str += " // Initialize dispersion / averaging parameter dict\n" |
---|
| 219 | param_str += " DispersionVisitor* visitor = new DispersionVisitor();\n" |
---|
| 220 | param_str += " PyObject * disp_dict;\n" |
---|
| 221 | for par in self.disp_params: |
---|
| 222 | par = par.strip() |
---|
| 223 | param_str += " disp_dict = PyDict_New();\n" |
---|
| 224 | param_str += " self->model->%s.dispersion->accept_as_source(visitor, self->model->%s.dispersion, disp_dict);\n" % (par, par) |
---|
| 225 | param_str += " PyDict_SetItemString(self->dispersion, \"%s\", disp_dict);\n" % par |
---|
| 226 | |
---|
| 227 | # Initialize dispersion object dictionnary |
---|
| 228 | param_str += "\n" |
---|
| 229 | |
---|
| 230 | |
---|
| 231 | newline = self.replaceToken(newline, |
---|
| 232 | "[INITDICTIONARY]", param_str) |
---|
| 233 | |
---|
| 234 | # Read dictionary |
---|
| 235 | param_str = " // Reader parameter dictionary\n" |
---|
| 236 | for par in self.params: |
---|
| 237 | param_str += " self->model->%s = PyFloat_AsDouble( PyDict_GetItemString(self->params, \"%s\") );\n" % \ |
---|
| 238 | (par, par) |
---|
| 239 | |
---|
| 240 | param_str += " // Read in dispersion parameters\n" |
---|
| 241 | param_str += " PyObject* disp_dict;\n" |
---|
| 242 | param_str += " DispersionVisitor* visitor = new DispersionVisitor();\n" |
---|
| 243 | for par in self.disp_params: |
---|
| 244 | par = par.strip() |
---|
| 245 | param_str += " disp_dict = PyDict_GetItemString(self->dispersion, \"%s\");\n" % par |
---|
| 246 | param_str += " self->model->%s.dispersion->accept_as_destination(visitor, self->model->%s.dispersion, disp_dict);\n" % (par, par) |
---|
| 247 | |
---|
| 248 | newline = self.replaceToken(newline, "[READDICTIONARY]", param_str) |
---|
| 249 | |
---|
| 250 | # Name of .c file |
---|
| 251 | #toks = string.split(self.file,'.') |
---|
| 252 | basename = os.path.basename(self.file) |
---|
| 253 | toks = basename.split('.') |
---|
| 254 | newline = self.replaceToken(newline, "[C_FILENAME]", toks[0]) |
---|
| 255 | |
---|
| 256 | # Include file |
---|
| 257 | basename = os.path.basename(self.file) |
---|
| 258 | newline = self.replaceToken(newline, |
---|
| 259 | "[INCLUDE_FILE]", basename) |
---|
| 260 | |
---|
| 261 | # Numerical calcs dealloc |
---|
| 262 | dealloc_str = "\n" |
---|
| 263 | if self.modelCalcFlag: |
---|
| 264 | dealloc_str = " modelcalculations_dealloc(&(self->model_pars.calcPars));\n" |
---|
| 265 | newline = self.replaceToken(newline, |
---|
| 266 | "[NUMERICAL_DEALLOC]", dealloc_str) |
---|
| 267 | |
---|
| 268 | # Numerical calcs init |
---|
| 269 | init_str = "\n" |
---|
| 270 | if self.modelCalcFlag: |
---|
| 271 | init_str = " modelcalculations_init(&(self->model_pars.calcPars));\n" |
---|
| 272 | newline = self.replaceToken(newline, |
---|
| 273 | "[NUMERICAL_INIT]", init_str) |
---|
| 274 | |
---|
| 275 | # Numerical calcs reset |
---|
| 276 | reset_str = "\n" |
---|
| 277 | if self.modelCalcFlag: |
---|
| 278 | reset_str = "modelcalculations_reset(&(self->model_pars.calcPars));\n" |
---|
| 279 | newline = self.replaceToken(newline, |
---|
| 280 | "[NUMERICAL_RESET]", reset_str) |
---|
| 281 | |
---|
| 282 | # Setting dispsertion weights |
---|
| 283 | set_weights = " // Ugliness necessary to go from python to C\n" |
---|
| 284 | set_weights = " // TODO: refactor this\n" |
---|
| 285 | for par in self.disp_params: |
---|
| 286 | par = par.strip() |
---|
| 287 | set_weights += " if (!strcmp(par_name, \"%s\")) {\n" % par |
---|
| 288 | set_weights += " self->model->%s.dispersion = dispersion;\n" % par |
---|
| 289 | set_weights += " } else" |
---|
| 290 | newline = self.replaceToken(newline, |
---|
| 291 | "[SET_DISPERSION]", set_weights) |
---|
| 292 | |
---|
| 293 | |
---|
| 294 | # Write new line to the wrapper .c file |
---|
| 295 | file.write(newline+'\n') |
---|
| 296 | |
---|
| 297 | |
---|
| 298 | file.close() |
---|
| 299 | |
---|
| 300 | def write_python_wrapper(self): |
---|
| 301 | """ Writes the python file to create the python extension class |
---|
| 302 | The file is written in ../[PYTHONCLASS].py |
---|
| 303 | """ |
---|
| 304 | |
---|
| 305 | file = open("../"+self.pythonClass+'.py', 'w') |
---|
| 306 | template = open("modelTemplate.txt", 'r') |
---|
| 307 | |
---|
| 308 | tmp_buf = template.read() |
---|
| 309 | tmp_lines = tmp_buf.split('\n') |
---|
| 310 | |
---|
| 311 | for tmp_line in tmp_lines: |
---|
| 312 | |
---|
| 313 | # Catch class name |
---|
| 314 | newline = self.replaceToken(tmp_line, |
---|
| 315 | "[CPYTHONCLASS]", 'C'+self.pythonClass) |
---|
| 316 | |
---|
| 317 | # Catch class name |
---|
| 318 | newline = self.replaceToken(newline, |
---|
| 319 | "[PYTHONCLASS]", self.pythonClass) |
---|
| 320 | |
---|
| 321 | # Include file |
---|
| 322 | newline = self.replaceToken(newline, |
---|
| 323 | "[INCLUDE_FILE]", self.file) |
---|
| 324 | |
---|
| 325 | # Include file |
---|
| 326 | newline = self.replaceToken(newline, |
---|
| 327 | "[DEFAULT_LIST]", self.default_list) |
---|
| 328 | |
---|
| 329 | # Parameter details |
---|
| 330 | newline = self.replaceToken(newline, |
---|
| 331 | "[PAR_DETAILS]", self.details) |
---|
| 332 | |
---|
| 333 | # Write new line to the wrapper .c file |
---|
| 334 | file.write(newline+'\n') |
---|
| 335 | |
---|
| 336 | file.close() |
---|
| 337 | |
---|
| 338 | |
---|
| 339 | def replaceToken(self, line, key, value): #pylint: disable-msg=R0201 |
---|
| 340 | """ Replace a token in the template file |
---|
| 341 | @param line: line of text to inspect |
---|
| 342 | @param key: token to look for |
---|
| 343 | @param value: string value to replace the token with |
---|
| 344 | @return: new string value |
---|
| 345 | """ |
---|
| 346 | lenkey = len(key) |
---|
| 347 | newline = line |
---|
| 348 | while newline.count(key)>0: |
---|
| 349 | index = newline.index(key) |
---|
| 350 | newline = newline[:index]+value+newline[index+lenkey:] |
---|
| 351 | return newline |
---|
| 352 | |
---|
| 353 | |
---|
| 354 | # main |
---|
| 355 | if __name__ == '__main__': |
---|
| 356 | if len(sys.argv)>1: |
---|
| 357 | print "Will look for file %s" % sys.argv[1] |
---|
| 358 | app = WrapperGenerator(sys.argv[1]) |
---|
| 359 | else: |
---|
| 360 | app = WrapperGenerator("test.h") |
---|
| 361 | app.read() |
---|
| 362 | app.write_c_wrapper() |
---|
| 363 | app.write_python_wrapper() |
---|
| 364 | print app |
---|
| 365 | |
---|
| 366 | # End of file |
---|