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     %(name)s value;
  55     struct %(name)sList *next;
  56 } %(name)sList;
  57 ''',
  58                  name=name)
  59
  60 def generate_struct(structname, fieldname, members):
  61     ret = mcgen('''
  62 struct %(name)s
  63 {
  64 ''',
  65           name=structname)
  66
  67     for argname, argentry, optional, structured in parse_args(members):
  68         if optional:
  69             ret += mcgen('''
  70     bool has_%(c_name)s;
  71 ''',
  72                          c_name=c_var(argname))
  73         if structured:
  74             push_indent()
  75             ret += generate_struct("", argname, argentry)
  76             pop_indent()
  77         else:
  78             ret += mcgen('''
  79     %(c_type)s %(c_name)s;
  80 ''',
  81                      c_type=c_type(argentry), c_name=c_var(argname))
  82
  83     if len(fieldname):
  84         fieldname = " " + fieldname
  85     ret += mcgen('''
  86 }%(field)s;
  87 ''',
  88             field=fieldname)
  89
  90     return ret
  91
  92 def generate_enum_lookup(name, values):
  93     ret = mcgen('''
  94 const char *%(name)s_lookup[] = {
  95 ''',
  96                          name=name)
  97     i = 0
  98     for value in values:
  99         ret += mcgen('''
 100     "%(value)s",
 101 ''',
 102                      value=value)
 103
 104     ret += mcgen('''
 105     NULL,
 106 };
 107
 108 ''')
 109     return ret
 110
 111 def generate_enum_name(name):
 112     if name.isupper():
 113         return c_fun(name, False)
 114     new_name = ''
 115     for c in c_fun(name, False):
 116         if c.isupper():
 117             new_name += '_'
 118         new_name += c
 119     return new_name.lstrip('_').upper()
 120
 121 def generate_enum(name, values):
 122     lookup_decl = mcgen('''
 123 extern const char *%(name)s_lookup[];
 124 ''',
 125                 name=name)
 126
 127     enum_decl = mcgen('''
 128 typedef enum %(name)s
 129 {
 130 ''',
 131                 name=name)
 132
 133     # append automatically generated _MAX value
 134     enum_values = values + [ 'MAX' ]
 135
 136     i = 0
 137     for value in enum_values:
 138         enum_decl += mcgen('''
 139     %(abbrev)s_%(value)s = %(i)d,
 140 ''',
 141                      abbrev=de_camel_case(name).upper(),
 142                      value=generate_enum_name(value),
 143                      i=i)
 144         i += 1
 145
 146     enum_decl += mcgen('''
 147 } %(name)s;
 148 ''',
 149                  name=name)
 150
 151     return lookup_decl + enum_decl
 152
 153 def generate_union(name, typeinfo):
 154     ret = mcgen('''
 155 struct %(name)s
 156 {
 157     %(name)sKind kind;
 158     union {
 159         void *data;
 160 ''',
 161                 name=name)
 162
 163     for key in typeinfo:
 164         ret += mcgen('''
 165         %(c_type)s %(c_name)s;
 166 ''',
 167                      c_type=c_type(typeinfo[key]),
 168                      c_name=c_fun(key))
 169
 170     ret += mcgen('''
 171     };
 172 };
 173 ''')
 174
 175     return ret
 176
 177 def generate_type_cleanup_decl(name):
 178     ret = mcgen('''
 179 void qapi_free_%(type)s(%(c_type)s obj);
 180 ''',
 181                 c_type=c_type(name),type=name)
 182     return ret
 183
 184 def generate_type_cleanup(name):
 185     ret = mcgen('''
 186
 187 void qapi_free_%(type)s(%(c_type)s obj)
 188 {
 189     QapiDeallocVisitor *md;
 190     Visitor *v;
 191
 192     if (!obj) {
 193         return;
 194     }
 195
 196     md = qapi_dealloc_visitor_new();
 197     v = qapi_dealloc_get_visitor(md);
 198     visit_type_%(type)s(v, &obj, NULL, NULL);
 199     qapi_dealloc_visitor_cleanup(md);
 200 }
 201 ''',
 202                 c_type=c_type(name),type=name)
 203     return ret
 204
 205
 206 try:
 207     opts, args = getopt.gnu_getopt(sys.argv[1:], "chbp:o:",
 208                                    ["source", "header", "builtins",
 209                                     "prefix=", "output-dir="])
 210 except getopt.GetoptError, err:
 211     print str(err)
 212     sys.exit(1)
 213
 214 output_dir = ""
 215 prefix = ""
 216 c_file = 'qapi-types.c'
 217 h_file = 'qapi-types.h'
 218
 219 do_c = False
 220 do_h = False
 221 do_builtins = False
 222
 223 for o, a in opts:
 224     if o in ("-p", "--prefix"):
 225         prefix = a
 226     elif o in ("-o", "--output-dir"):
 227         output_dir = a + "/"
 228     elif o in ("-c", "--source"):
 229         do_c = True
 230     elif o in ("-h", "--header"):
 231         do_h = True
 232     elif o in ("-b", "--builtins"):
 233         do_builtins = True
 234
 235 if not do_c and not do_h:
 236     do_c = True
 237     do_h = True
 238
 239 c_file = output_dir + prefix + c_file
 240 h_file = output_dir + prefix + h_file
 241
 242 try:
 243     os.makedirs(output_dir)
 244 except os.error, e:
 245     if e.errno != errno.EEXIST:
 246         raise
 247
 248 def maybe_open(really, name, opt):
 249     if really:
 250         return open(name, opt)
 251     else:
 252         import StringIO
 253         return StringIO.StringIO()
 254
 255 fdef = maybe_open(do_c, c_file, 'w')
 256 fdecl = maybe_open(do_h, h_file, 'w')
 257
 258 fdef.write(mcgen('''
 259 /* AUTOMATICALLY GENERATED, DO NOT MODIFY */
 260
 261 /*
 262  * deallocation functions for schema-defined QAPI types
 263  *
 264  * Copyright IBM, Corp. 2011
 265  *
 266  * Authors:
 267  *  Anthony Liguori   <[email protected]>
 268  *  Michael Roth      <[email protected]>
 269  *
 270  * This work is licensed under the terms of the GNU LGPL, version 2.1 or later.
 271  * See the COPYING.LIB file in the top-level directory.
 272  *
 273  */
 274
 275 #include "qapi/dealloc-visitor.h"
 276 #include "%(prefix)sqapi-types.h"
 277 #include "%(prefix)sqapi-visit.h"
 278
 279 ''',             prefix=prefix))
 280
 281 fdecl.write(mcgen('''
 282 /* AUTOMATICALLY GENERATED, DO NOT MODIFY */
 283
 284 /*
 285  * schema-defined QAPI types
 286  *
 287  * Copyright IBM, Corp. 2011
 288  *
 289  * Authors:
 290  *  Anthony Liguori   <[email protected]>
 291  *
 292  * This work is licensed under the terms of the GNU LGPL, version 2.1 or later.
 293  * See the COPYING.LIB file in the top-level directory.
 294  *
 295  */
 296
 297 #ifndef %(guard)s
 298 #define %(guard)s
 299
 300 #include <stdbool.h>
 301 #include <stdint.h>
 302
 303 ''',
 304                   guard=guardname(h_file)))
 305
 306 exprs = parse_schema(sys.stdin)
 307 exprs = filter(lambda expr: not expr.has_key('gen'), exprs)
 308
 309 fdecl.write(guardstart("QAPI_TYPES_BUILTIN_STRUCT_DECL"))
 310 for typename in builtin_types:
 311     fdecl.write(generate_fwd_struct(typename, None, builtin_type=True))
 312 fdecl.write(guardend("QAPI_TYPES_BUILTIN_STRUCT_DECL"))
 313
 314 for expr in exprs:
 315     ret = "\n"
 316     if expr.has_key('type'):
 317         ret += generate_fwd_struct(expr['type'], expr['data'])
 318     elif expr.has_key('enum'):
 319         ret += generate_enum(expr['enum'], expr['data']) + "\n"
 320         ret += generate_fwd_enum_struct(expr['enum'], expr['data'])
 321         fdef.write(generate_enum_lookup(expr['enum'], expr['data']))
 322     elif expr.has_key('union'):
 323         ret += generate_fwd_struct(expr['union'], expr['data']) + "\n"
 324         ret += generate_enum('%sKind' % expr['union'], expr['data'].keys())
 325         fdef.write(generate_enum_lookup('%sKind' % expr['union'], expr['data'].keys()))
 326     else:
 327         continue
 328     fdecl.write(ret)
 329
 330 # to avoid header dependency hell, we always generate declarations
 331 # for built-in types in our header files and simply guard them
 332 fdecl.write(guardstart("QAPI_TYPES_BUILTIN_CLEANUP_DECL"))
 333 for typename in builtin_types:
 334     fdecl.write(generate_type_cleanup_decl(typename + "List"))
 335 fdecl.write(guardend("QAPI_TYPES_BUILTIN_CLEANUP_DECL"))
 336
 337 # ...this doesn't work for cases where we link in multiple objects that
 338 # have the functions defined, so we use -b option to provide control
 339 # over these cases
 340 if do_builtins:
 341     fdef.write(guardstart("QAPI_TYPES_BUILTIN_CLEANUP_DEF"))
 342     for typename in builtin_types:
 343         fdef.write(generate_type_cleanup(typename + "List"))
 344     fdef.write(guardend("QAPI_TYPES_BUILTIN_CLEANUP_DEF"))
 345
 346 for expr in exprs:
 347     ret = "\n"
 348     if expr.has_key('type'):
 349         ret += generate_struct(expr['type'], "", expr['data']) + "\n"
 350         ret += generate_type_cleanup_decl(expr['type'] + "List")
 351         fdef.write(generate_type_cleanup(expr['type'] + "List") + "\n")
 352         ret += generate_type_cleanup_decl(expr['type'])
 353         fdef.write(generate_type_cleanup(expr['type']) + "\n")
 354     elif expr.has_key('union'):
 355         ret += generate_union(expr['union'], expr['data'])
 356         ret += generate_type_cleanup_decl(expr['union'] + "List")
 357         fdef.write(generate_type_cleanup(expr['union'] + "List") + "\n")
 358         ret += generate_type_cleanup_decl(expr['union'])
 359         fdef.write(generate_type_cleanup(expr['union']) + "\n")
 360     elif expr.has_key('enum'):
 361         ret += generate_type_cleanup_decl(expr['enum'] + "List")
 362         fdef.write(generate_type_cleanup(expr['enum'] + "List") + "\n")
 363     else:
 364         continue
 365     fdecl.write(ret)
 366
 367 fdecl.write('''
 368 #endif
 369 ''')
 370
 371 fdecl.flush()
 372 fdecl.close()
 373
 374 fdef.flush()
 375 fdef.close()