script/generate_param.py

   1 # Unix SMB/CIFS implementation.
   2 # Copyright (C) 2014 Catalyst.Net Ltd
   3 #
   4 # Auto generate param_functions.c
   5 #
   6 #   ** NOTE! The following LGPL license applies to the ldb
   7 #   ** library. This does NOT imply that all of Samba is released
   8 #   ** under the LGPL
   9 #
  10 #  This library is free software; you can redistribute it and/or
  11 #  modify it under the terms of the GNU Lesser General Public
  12 #  License as published by the Free Software Foundation; either
  13 #  version 3 of the License, or (at your option) any later version.
  14 #
  15 #  This library is distributed in the hope that it will be useful,
  16 #  but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 #  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18 #  Lesser General Public License for more details.
  19 #
  20 #  You should have received a copy of the GNU Lesser General Public
  21 #  License along with this library; if not, see <http://www.gnu.org/licenses/>.
  22 #
  23
  24 import errno
  25 import os
  26 import re
  27 import subprocess
  28 import xml.etree.ElementTree as ET
  29 import sys
  30 import optparse
  31
  32 # parse command line arguments
  33 parser = optparse.OptionParser()
  34 parser.add_option("-f", "--file", dest="filename",
  35                   help="input file", metavar="FILE")
  36 parser.add_option("-o", "--output", dest="output",
  37                   help='output file', metavar="FILE")
  38 parser.add_option("--mode", type="choice", metavar="<FUNCTIONS|S3PROTO|LIBPROTO|PARAMDEFS|PARAMTABLE>",
  39                  choices=["FUNCTIONS", "S3PROTO", "LIBPROTO", "PARAMDEFS", "PARAMTABLE"], default="FUNCTIONS")
  40 parser.add_option("--scope", metavar="<GLOBAL|LOCAL>",
  41                   choices = ["GLOBAL", "LOCAL"], default="GLOBAL")
  42
  43 (options, args) = parser.parse_args()
  44
  45 if options.filename is None:
  46     parser.error("No input file specified")
  47 if options.output is None:
  48     parser.error("No output file specified")
  49
  50 def iterate_all(path):
  51     """Iterate and yield all the parameters.
  52
  53     :param path: path to parameters xml file
  54     """
  55
  56     try:
  57         p = open(path, 'r')
  58     except IOError as e:
  59         raise Exception("Error opening parameters file")
  60     out = p.read()
  61
  62     # parse the parameters xml file
  63     root = ET.fromstring(out)
  64     for parameter in root:
  65         name = parameter.attrib.get("name")
  66         param_type = parameter.attrib.get("type")
  67         context = parameter.attrib.get("context")
  68         func = parameter.attrib.get("function")
  69         synonym = parameter.attrib.get("synonym")
  70         removed = parameter.attrib.get("removed")
  71         generated = parameter.attrib.get("generated_function")
  72         handler = parameter.attrib.get("handler")
  73         enumlist = parameter.attrib.get("enumlist")
  74         deprecated = parameter.attrib.get("deprecated")
  75         synonyms = parameter.findall('synonym')
  76
  77         if removed == "1":
  78             continue
  79
  80         constant = parameter.attrib.get("constant")
  81         parm = parameter.attrib.get("parm")
  82         if name is None or param_type is None or context is None:
  83             raise Exception("Error parsing parameter: " + name)
  84         if func is None:
  85             func = name.replace(" ", "_").lower()
  86         if enumlist is None:
  87             enumlist = "NULL"
  88         if handler is None:
  89             handler = "NULL"
  90         yield {'name': name,
  91                'type': param_type,
  92                'context': context,
  93                'function': func,
  94                'constant': (constant == '1'),
  95                'parm': (parm == '1'),
  96                'synonym' : synonym,
  97                'generated' : generated,
  98                'enumlist' : enumlist,
  99                'handler' : handler,
 100                'deprecated' : deprecated,
 101                'synonyms' : synonyms }
 102
 103 # map doc attributes to a section of the generated function
 104 context_dict = {"G": "_GLOBAL", "S": "_LOCAL"}
 105 param_type_dict = {
 106                     "boolean"      : "_BOOL",
 107                     "list"         : "_LIST",
 108                     "string"       : "_STRING",
 109                     "integer"      : "_INTEGER",
 110                     "enum"         : "_INTEGER",
 111                     "char"         : "_CHAR",
 112                     "boolean-auto" : "_INTEGER",
 113                     "cmdlist"      : "_LIST",
 114                     "bytes"        : "_INTEGER",
 115                     "octal"        : "_INTEGER",
 116                     "ustring"      : "_STRING",
 117                   }
 118
 119 def generate_functions(path_in, path_out):
 120     f = open(path_out, 'w')
 121     try:
 122        f.write('/* This file was automatically generated by generate_param.py. DO NOT EDIT */\n\n')
 123        for parameter in iterate_all(options.filename):
 124             # filter out parameteric options
 125             if ':' in parameter['name']:
 126                 continue
 127             if parameter['synonym'] == "1":
 128                 continue
 129             if parameter['generated'] == "0":
 130                 continue
 131
 132             output_string = "FN"
 133             temp = context_dict.get(parameter['context'])
 134             if temp is None:
 135                 raise Exception(parameter['name'] + " has an invalid context " + parameter['context'])
 136             output_string += temp
 137             if parameter['constant']:
 138                 output_string += "_CONST"
 139             if parameter['parm']:
 140                 output_string += "_PARM"
 141             temp = param_type_dict.get(parameter['type'])
 142             if temp is None:
 143                 raise Exception(parameter['name'] + " has an invalid param type " + parameter['type'])
 144             output_string += temp
 145             f.write(output_string + "(" + parameter['function'] +", " + parameter['function'] + ')\n')
 146     finally:
 147         f.close()
 148
 149 mapping = {
 150             'boolean'      : 'bool ',
 151             'string'       : 'char *',
 152             'integer'      : 'int ',
 153             'char'         : 'char ',
 154             'list'         : 'const char **',
 155             'enum'         : 'int ',
 156             'boolean-auto' : 'int ',
 157             'cmdlist'      : 'const char **',
 158             'bytes'        : 'int ',
 159             'octal'        : 'int ',
 160             'ustring'      : 'char *',
 161           }
 162
 163 def make_s3_param_proto(path_in, path_out):
 164     file_out = open(path_out, 'w')
 165     try:
 166         file_out.write('/* This file was automatically generated by generate_param.py. DO NOT EDIT */\n\n')
 167         header = get_header(path_out)
 168         file_out.write("#ifndef %s\n" % header)
 169         file_out.write("#define %s\n\n" % header)
 170         for parameter in iterate_all(path_in):
 171             # filter out parameteric options
 172             if ':' in parameter['name']:
 173                 continue
 174             if parameter['synonym'] == "1":
 175                 continue
 176             if parameter['generated'] == "0":
 177                 continue
 178
 179             output_string = ""
 180             if parameter['constant']:
 181                 output_string += 'const '
 182             param_type = mapping.get(parameter['type'])
 183             if param_type is None:
 184                raise Exception(parameter['name'] + " has an invalid context " + parameter['context'])
 185             output_string += param_type
 186             output_string += "lp_%s" % parameter['function']
 187
 188             param = None
 189             if parameter['parm']:
 190                 param = "const struct share_params *p"
 191             else:
 192                 param = "int"
 193
 194             if parameter['type'] == 'string' and not parameter['constant']:
 195                 if parameter['context'] == 'G':
 196                     output_string += '(TALLOC_CTX *ctx);\n'
 197                 elif parameter['context'] == 'S':
 198                     output_string += '(TALLOC_CTX *ctx, %s);\n' % param
 199                 else:
 200                     raise Exception(parameter['name'] + " has an invalid param type " + parameter['type'])
 201             else:
 202                 if parameter['context'] == 'G':
 203                     output_string += '(void);\n'
 204                 elif parameter['context'] == 'S':
 205                     output_string += '(%s);\n' % param
 206                 else:
 207                     raise Exception(parameter['name'] + " has an invalid param type " + parameter['type'])
 208
 209             file_out.write(output_string)
 210
 211         file_out.write("\n#endif /* %s */\n\n" % header)
 212     finally:
 213         file_out.close()
 214
 215
 216 def make_lib_proto(path_in, path_out):
 217     file_out = open(path_out, 'w')
 218     try:
 219         file_out.write('/* This file was automatically generated by generate_param.py. DO NOT EDIT */\n\n')
 220         for parameter in iterate_all(path_in):
 221             # filter out parameteric options
 222             if ':' in parameter['name']:
 223                 continue
 224             if parameter['synonym'] == "1":
 225                 continue
 226             if parameter['generated'] == "0":
 227                 continue
 228
 229             output_string = ""
 230             if parameter['constant']:
 231                 output_string += 'const '
 232             param_type = mapping.get(parameter['type'])
 233             if param_type is None:
 234                raise Exception(parameter['name'] + " has an invalid context " + parameter['context'])
 235             output_string += param_type
 236
 237             output_string += "lpcfg_%s" % parameter['function']
 238
 239             if parameter['type'] == 'string' and not parameter['constant']:
 240                 if parameter['context'] == 'G':
 241                     output_string += '(struct loadparm_context *, TALLOC_CTX *ctx);\n'
 242                 elif parameter['context'] == 'S':
 243                     output_string += '(struct loadparm_service *, struct loadparm_service *, TALLOC_CTX *ctx);\n'
 244                 else:
 245                     raise Exception(parameter['name'] + " has an invalid param type " + parameter['type'])
 246             else:
 247                 if parameter['context'] == 'G':
 248                     output_string += '(struct loadparm_context *);\n'
 249                 elif parameter['context'] == 'S':
 250                     output_string += '(struct loadparm_service *, struct loadparm_service *);\n'
 251                 else:
 252                     raise Exception(parameter['name'] + " has an invalid param type " + parameter['type'])
 253
 254
 255             file_out.write(output_string)
 256     finally:
 257         file_out.close()
 258
 259 def get_header(path):
 260     header = os.path.basename(path).upper()
 261     header = header.replace(".", "_").replace("\\", "_").replace("-", "_")
 262     return "__%s__" % header
 263
 264 def make_param_defs(path_in, path_out, scope):
 265     file_out = open(path_out, 'w')
 266     try:
 267         file_out.write('/* This file was automatically generated by generate_param.py. DO NOT EDIT */\n\n')
 268         header = get_header(path_out)
 269         file_out.write("#ifndef %s\n" % header)
 270         file_out.write("#define %s\n\n" % header)
 271         if scope == "GLOBAL":
 272             file_out.write("/**\n")
 273             file_out.write(" * This structure describes global (ie., server-wide) parameters.\n")
 274             file_out.write(" */\n")
 275             file_out.write("struct loadparm_global \n")
 276             file_out.write("{\n")
 277             file_out.write("\tTALLOC_CTX *ctx; /* Context for talloced members */\n")
 278         elif scope == "LOCAL":
 279             file_out.write("/**\n")
 280             file_out.write(" * This structure describes a single service.\n")
 281             file_out.write(" */\n")
 282             file_out.write("struct loadparm_service \n")
 283             file_out.write("{\n")
 284             file_out.write("\tbool   autoloaded;\n")
 285
 286         for parameter in iterate_all(path_in):
 287             # filter out parameteric options
 288             if ':' in parameter['name']:
 289                 continue
 290             if parameter['synonym'] == "1":
 291                 continue
 292
 293             if (scope == "GLOBAL" and parameter['context'] != "G" or
 294                 scope == "LOCAL" and parameter['context'] != "S"):
 295                 continue
 296
 297             output_string = "\t"
 298             param_type = mapping.get(parameter['type'])
 299             if param_type is None:
 300                raise Exception(parameter['name'] + " has an invalid context " + parameter['context'])
 301             output_string += param_type
 302
 303             output_string += "  %s;\n" % parameter['function']
 304             file_out.write(output_string)
 305
 306         file_out.write("LOADPARM_EXTRA_%sS\n" % scope)
 307         file_out.write("};\n")
 308         file_out.write("\n#endif /* %s */\n\n" % header)
 309     finally:
 310         file_out.close()
 311
 312 type_dict = {
 313               "boolean"      : "P_BOOL",
 314               "boolean-rev"  : "P_BOOLREV",
 315               "boolean-auto" : "P_ENUM",
 316               "list"         : "P_LIST",
 317               "string"       : "P_STRING",
 318               "integer"      : "P_INTEGER",
 319               "enum"         : "P_ENUM",
 320               "char"         : "P_CHAR",
 321               "cmdlist"      : "P_CMDLIST",
 322               "bytes"        : "P_BYTES",
 323               "octal"        : "P_OCTAL",
 324               "ustring"      : "P_USTRING",
 325             }
 326
 327 def make_param_table(path_in, path_out):
 328     file_out = open(path_out, 'w')
 329     try:
 330         file_out.write('/* This file was automatically generated by generate_param.py. DO NOT EDIT */\n\n')
 331         header = get_header(path_out)
 332         file_out.write("#ifndef %s\n" % header)
 333         file_out.write("#define %s\n\n" % header)
 334
 335         file_out.write("struct parm_struct parm_table[] = {\n")
 336
 337         for parameter in iterate_all(path_in):
 338             # filter out parameteric options
 339             if ':' in parameter['name']:
 340                 continue
 341             if parameter['context'] == 'G':
 342                 p_class = "P_GLOBAL"
 343             else:
 344                 p_class = "P_LOCAL"
 345
 346             p_type = type_dict.get(parameter['type'])
 347
 348             if parameter['context'] == 'G':
 349                 temp = "GLOBAL"
 350             else:
 351                 temp = "LOCAL"
 352             offset = "%s_VAR(%s)" % (temp, parameter['function'])
 353
 354             enumlist = parameter['enumlist']
 355             handler = parameter['handler']
 356             synonym = parameter['synonym']
 357             deprecated = parameter['deprecated']
 358             flags_list = []
 359             if synonym == "1":
 360                 flags_list.append("FLAG_SYNONYM")
 361             if deprecated == "1":
 362                 flags_list.append("FLAG_DEPRECATED")
 363             flags = "|".join(flags_list)
 364             synonyms = parameter['synonyms']
 365
 366             file_out.write("\t{\n")
 367             file_out.write("\t\t.label\t\t= \"%s\",\n" % parameter['name'])
 368             file_out.write("\t\t.type\t\t= %s,\n" % p_type)
 369             file_out.write("\t\t.p_class\t= %s,\n" % p_class)
 370             file_out.write("\t\t.offset\t\t= %s,\n" % offset)
 371             file_out.write("\t\t.special\t= %s,\n" % handler)
 372             file_out.write("\t\t.enum_list\t= %s,\n" % enumlist)
 373             if flags != "":
 374                 file_out.write("\t\t.flags\t\t= %s,\n" % flags)
 375             file_out.write("\t},\n")
 376
 377             if synonyms is not None:
 378                 # for synonyms, we only list the synonym flag:
 379                 flags = "FLAG_SYNONYM"
 380                 for syn in synonyms:
 381                     file_out.write("\t{\n")
 382                     file_out.write("\t\t.label\t\t= \"%s\",\n" % syn.text)
 383                     file_out.write("\t\t.type\t\t= %s,\n" % p_type)
 384                     file_out.write("\t\t.p_class\t= %s,\n" % p_class)
 385                     file_out.write("\t\t.offset\t\t= %s,\n" % offset)
 386                     file_out.write("\t\t.special\t= %s,\n" % handler)
 387                     file_out.write("\t\t.enum_list\t= %s,\n" % enumlist)
 388                     if flags != "":
 389                         file_out.write("\t\t.flags\t\t= %s,\n" % flags)
 390                     file_out.write("\t},\n")
 391
 392         file_out.write("\n\t{NULL,  P_BOOL,  P_NONE,  0,  NULL,  NULL,  0}\n");
 393         file_out.write("};\n")
 394         file_out.write("\n#endif /* %s */\n\n" % header)
 395     finally:
 396         file_out.close()
 397
 398 if options.mode == 'FUNCTIONS':
 399     generate_functions(options.filename, options.output)
 400 elif options.mode == 'S3PROTO':
 401     make_s3_param_proto(options.filename, options.output)
 402 elif options.mode == 'LIBPROTO':
 403     make_lib_proto(options.filename, options.output)
 404 elif options.mode == 'PARAMDEFS':
 405     make_param_defs(options.filename, options.output, options.scope)
 406 elif options.mode == 'PARAMTABLE':
 407     make_param_table(options.filename, options.output)