scripts/qapi-types.py

   1 #
   2 # QAPI types generator
   3 #
   4 # Copyright IBM, Corp. 2011
   5 #
   6 # Authors:
   7 #  Anthony Liguori <[email protected]>
   8 #
   9 # This work is licensed under the terms of the GNU GPLv2.
  10 # See the COPYING.LIB file in the top-level directory.
  11
  12 from ordereddict import OrderedDict
  13 from qapi import *
  14 import sys
  15 import os
  16 import getopt
  17 import errno
  18
  19 def generate_fwd_struct(name, members, builtin_type=False):
  20     if builtin_type:
  21         return mcgen('''
  22
  23 typedef struct %(name)sList
  24 {
  25     union {
  26         %(type)s value;
  27         uint64_t padding;
  28     };
  29     struct %(name)sList *next;
  30 } %(name)sList;
  31 ''',
  32                      type=c_type(name),
  33                      name=name)
  34
  35     return mcgen('''
  36
  37 typedef struct %(name)s %(name)s;
  38
  39 typedef struct %(name)sList
  40 {
  41     union {
  42         %(name)s *value;
  43         uint64_t padding;
  44     };
  45     struct %(name)sList *next;
  46 } %(name)sList;
  47 ''',
  48                  name=name)
  49
  50 def generate_fwd_enum_struct(name, members):
  51     return mcgen('''
  52 typedef struct %(name)sList
  53 {
  54     union {
  55         %(name)s value;
  56         uint64_t padding;
  57     };
  58     struct %(name)sList *next;
  59 } %(name)sList;
  60 ''',
  61                  name=name)
  62
  63 def generate_struct_fields(members):
  64     ret = ''
  65
  66     for argname, argentry, optional, structured in parse_args(members):
  67         if optional:
  68             ret += mcgen('''
  69     bool has_%(c_name)s;
  70 ''',
  71                          c_name=c_var(argname))
  72         if structured:
  73             push_indent()
  74             ret += generate_struct({ "field": argname, "data": argentry})
  75             pop_indent()
  76         else:
  77             ret += mcgen('''
  78     %(c_type)s %(c_name)s;
  79 ''',
  80                      c_type=c_type(argentry), c_name=c_var(argname))
  81
  82     return ret
  83
  84 def generate_struct(expr):
  85
  86     structname = expr.get('type', "")
  87     fieldname = expr.get('field', "")
  88     members = expr['data']
  89     base = expr.get('base')
  90
  91     ret = mcgen('''
  92 struct %(name)s
  93 {
  94 ''',
  95           name=structname)
  96
  97     if base:
  98         ret += generate_struct_fields({'base': base})
  99
 100     ret += generate_struct_fields(members)
 101
 102     if len(fieldname):
 103         fieldname = " " + fieldname
 104     ret += mcgen('''
 105 }%(field)s;
 106 ''',
 107             field=fieldname)
 108
 109     return ret
 110
 111 def generate_enum_lookup(name, values):
 112     ret = mcgen('''
 113 const char *%(name)s_lookup[] = {
 114 ''',
 115                          name=name)
 116     i = 0
 117     for value in values:
 118         ret += mcgen('''
 119     "%(value)s",
 120 ''',
 121                      value=value)
 122
 123     ret += mcgen('''
 124     NULL,
 125 };
 126
 127 ''')
 128     return ret
 129
 130 def generate_enum_name(name):
 131     if name.isupper():
 132         return c_fun(name, False)
 133     new_name = ''
 134     for c in c_fun(name, False):
 135         if c.isupper():
 136             new_name += '_'
 137         new_name += c
 138     return new_name.lstrip('_').upper()
 139
 140 def generate_enum(name, values):
 141     lookup_decl = mcgen('''
 142 extern const char *%(name)s_lookup[];
 143 ''',
 144                 name=name)
 145
 146     enum_decl = mcgen('''
 147 typedef enum %(name)s
 148 {
 149 ''',
 150                 name=name)
 151
 152     # append automatically generated _MAX value
 153     enum_values = values + [ 'MAX' ]
 154
 155     i = 0
 156     for value in enum_values:
 157         enum_decl += mcgen('''
 158     %(abbrev)s_%(value)s = %(i)d,
 159 ''',
 160                      abbrev=de_camel_case(name).upper(),
 161                      value=generate_enum_name(value),
 162                      i=i)
 163         i += 1
 164
 165     enum_decl += mcgen('''
 166 } %(name)s;
 167 ''',
 168                  name=name)
 169
 170     return lookup_decl + enum_decl
 171
 172 def generate_anon_union_qtypes(expr):
 173
 174     name = expr['union']
 175     members = expr['data']
 176
 177     ret = mcgen('''
 178 const int %(name)s_qtypes[QTYPE_MAX] = {
 179 ''',
 180     name=name)
 181
 182     for key in members:
 183         qapi_type = members[key]
 184         if builtin_type_qtypes.has_key(qapi_type):
 185             qtype = builtin_type_qtypes[qapi_type]
 186         elif find_struct(qapi_type):
 187             qtype = "QTYPE_QDICT"
 188         elif find_union(qapi_type):
 189             qtype = "QTYPE_QDICT"
 190         else:
 191             assert False, "Invalid anonymous union member"
 192
 193         ret += mcgen('''
 194     [ %(qtype)s ] = %(abbrev)s_KIND_%(enum)s,
 195 ''',
 196         qtype = qtype,
 197         abbrev = de_camel_case(name).upper(),
 198         enum = c_fun(de_camel_case(key),False).upper())
 199
 200     ret += mcgen('''
 201 };
 202 ''')
 203     return ret
 204
 205
 206 def generate_union(expr):
 207
 208     name = expr['union']
 209     typeinfo = expr['data']
 210
 211     base = expr.get('base')
 212     discriminator = expr.get('discriminator')
 213
 214     ret = mcgen('''
 215 struct %(name)s
 216 {
 217     %(name)sKind kind;
 218     union {
 219         void *data;
 220 ''',
 221                 name=name)
 222
 223     for key in typeinfo:
 224         ret += mcgen('''
 225         %(c_type)s %(c_name)s;
 226 ''',
 227                      c_type=c_type(typeinfo[key]),
 228                      c_name=c_fun(key))
 229
 230     ret += mcgen('''
 231     };
 232 ''')
 233
 234     if base:
 235         base_fields = find_struct(base)['data']
 236         if discriminator:
 237             base_fields = base_fields.copy()
 238             del base_fields[discriminator]
 239         ret += generate_struct_fields(base_fields)
 240     else:
 241         assert not discriminator
 242
 243     ret += mcgen('''
 244 };
 245 ''')
 246     if discriminator == {}:
 247         ret += mcgen('''
 248 extern const int %(name)s_qtypes[];
 249 ''',
 250             name=name)
 251
 252
 253     return ret
 254
 255 def generate_type_cleanup_decl(name):
 256     ret = mcgen('''
 257 void qapi_free_%(type)s(%(c_type)s obj);
 258 ''',
 259                 c_type=c_type(name),type=name)
 260     return ret
 261
 262 def generate_type_cleanup(name):
 263     ret = mcgen('''
 264
 265 void qapi_free_%(type)s(%(c_type)s obj)
 266 {
 267     QapiDeallocVisitor *md;
 268     Visitor *v;
 269
 270     if (!obj) {
 271         return;
 272     }
 273
 274     md = qapi_dealloc_visitor_new();
 275     v = qapi_dealloc_get_visitor(md);
 276     visit_type_%(type)s(v, &obj, NULL, NULL);
 277     qapi_dealloc_visitor_cleanup(md);
 278 }
 279 ''',
 280                 c_type=c_type(name),type=name)
 281     return ret
 282
 283
 284 try:
 285     opts, args = getopt.gnu_getopt(sys.argv[1:], "chbp:o:",
 286                                    ["source", "header", "builtins",
 287                                     "prefix=", "output-dir="])
 288 except getopt.GetoptError, err:
 289     print str(err)
 290     sys.exit(1)
 291
 292 output_dir = ""
 293 prefix = ""
 294 c_file = 'qapi-types.c'
 295 h_file = 'qapi-types.h'
 296
 297 do_c = False
 298 do_h = False
 299 do_builtins = False
 300
 301 for o, a in opts:
 302     if o in ("-p", "--prefix"):
 303         prefix = a
 304     elif o in ("-o", "--output-dir"):
 305         output_dir = a + "/"
 306     elif o in ("-c", "--source"):
 307         do_c = True
 308     elif o in ("-h", "--header"):
 309         do_h = True
 310     elif o in ("-b", "--builtins"):
 311         do_builtins = True
 312
 313 if not do_c and not do_h:
 314     do_c = True
 315     do_h = True
 316
 317 c_file = output_dir + prefix + c_file
 318 h_file = output_dir + prefix + h_file
 319
 320 try:
 321     os.makedirs(output_dir)
 322 except os.error, e:
 323     if e.errno != errno.EEXIST:
 324         raise
 325
 326 def maybe_open(really, name, opt):
 327     if really:
 328         return open(name, opt)
 329     else:
 330         import StringIO
 331         return StringIO.StringIO()
 332
 333 fdef = maybe_open(do_c, c_file, 'w')
 334 fdecl = maybe_open(do_h, h_file, 'w')
 335
 336 fdef.write(mcgen('''
 337 /* AUTOMATICALLY GENERATED, DO NOT MODIFY */
 338
 339 /*
 340  * deallocation functions for schema-defined QAPI types
 341  *
 342  * Copyright IBM, Corp. 2011
 343  *
 344  * Authors:
 345  *  Anthony Liguori   <[email protected]>
 346  *  Michael Roth      <[email protected]>
 347  *
 348  * This work is licensed under the terms of the GNU LGPL, version 2.1 or later.
 349  * See the COPYING.LIB file in the top-level directory.
 350  *
 351  */
 352
 353 #include "qapi/dealloc-visitor.h"
 354 #include "%(prefix)sqapi-types.h"
 355 #include "%(prefix)sqapi-visit.h"
 356
 357 ''',             prefix=prefix))
 358
 359 fdecl.write(mcgen('''
 360 /* AUTOMATICALLY GENERATED, DO NOT MODIFY */
 361
 362 /*
 363  * schema-defined QAPI types
 364  *
 365  * Copyright IBM, Corp. 2011
 366  *
 367  * Authors:
 368  *  Anthony Liguori   <[email protected]>
 369  *
 370  * This work is licensed under the terms of the GNU LGPL, version 2.1 or later.
 371  * See the COPYING.LIB file in the top-level directory.
 372  *
 373  */
 374
 375 #ifndef %(guard)s
 376 #define %(guard)s
 377
 378 #include <stdbool.h>
 379 #include <stdint.h>
 380
 381 ''',
 382                   guard=guardname(h_file)))
 383
 384 exprs = parse_schema(sys.stdin)
 385 exprs = filter(lambda expr: not expr.has_key('gen'), exprs)
 386
 387 fdecl.write(guardstart("QAPI_TYPES_BUILTIN_STRUCT_DECL"))
 388 for typename in builtin_types:
 389     fdecl.write(generate_fwd_struct(typename, None, builtin_type=True))
 390 fdecl.write(guardend("QAPI_TYPES_BUILTIN_STRUCT_DECL"))
 391
 392 for expr in exprs:
 393     ret = "\n"
 394     if expr.has_key('type'):
 395         ret += generate_fwd_struct(expr['type'], expr['data'])
 396     elif expr.has_key('enum'):
 397         ret += generate_enum(expr['enum'], expr['data']) + "\n"
 398         ret += generate_fwd_enum_struct(expr['enum'], expr['data'])
 399         fdef.write(generate_enum_lookup(expr['enum'], expr['data']))
 400     elif expr.has_key('union'):
 401         ret += generate_fwd_struct(expr['union'], expr['data']) + "\n"
 402         ret += generate_enum('%sKind' % expr['union'], expr['data'].keys())
 403         fdef.write(generate_enum_lookup('%sKind' % expr['union'], expr['data'].keys()))
 404         if expr.get('discriminator') == {}:
 405             fdef.write(generate_anon_union_qtypes(expr))
 406     else:
 407         continue
 408     fdecl.write(ret)
 409
 410 # to avoid header dependency hell, we always generate declarations
 411 # for built-in types in our header files and simply guard them
 412 fdecl.write(guardstart("QAPI_TYPES_BUILTIN_CLEANUP_DECL"))
 413 for typename in builtin_types:
 414     fdecl.write(generate_type_cleanup_decl(typename + "List"))
 415 fdecl.write(guardend("QAPI_TYPES_BUILTIN_CLEANUP_DECL"))
 416
 417 # ...this doesn't work for cases where we link in multiple objects that
 418 # have the functions defined, so we use -b option to provide control
 419 # over these cases
 420 if do_builtins:
 421     fdef.write(guardstart("QAPI_TYPES_BUILTIN_CLEANUP_DEF"))
 422     for typename in builtin_types:
 423         fdef.write(generate_type_cleanup(typename + "List"))
 424     fdef.write(guardend("QAPI_TYPES_BUILTIN_CLEANUP_DEF"))
 425
 426 for expr in exprs:
 427     ret = "\n"
 428     if expr.has_key('type'):
 429         ret += generate_struct(expr) + "\n"
 430         ret += generate_type_cleanup_decl(expr['type'] + "List")
 431         fdef.write(generate_type_cleanup(expr['type'] + "List") + "\n")
 432         ret += generate_type_cleanup_decl(expr['type'])
 433         fdef.write(generate_type_cleanup(expr['type']) + "\n")
 434     elif expr.has_key('union'):
 435         ret += generate_union(expr)
 436         ret += generate_type_cleanup_decl(expr['union'] + "List")
 437         fdef.write(generate_type_cleanup(expr['union'] + "List") + "\n")
 438         ret += generate_type_cleanup_decl(expr['union'])
 439         fdef.write(generate_type_cleanup(expr['union']) + "\n")
 440     elif expr.has_key('enum'):
 441         ret += generate_type_cleanup_decl(expr['enum'] + "List")
 442         fdef.write(generate_type_cleanup(expr['enum'] + "List") + "\n")
 443     else:
 444         continue
 445     fdecl.write(ret)
 446
 447 fdecl.write('''
 448 #endif
 449 ''')
 450
 451 fdecl.flush()
 452 fdecl.close()
 453
 454 fdef.flush()
 455 fdef.close()