tools/widl/typetree.c

   1 /*
   2  * IDL Type Tree
   3  *
   4  * Copyright 2008 Robert Shearman
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 #include "config.h"
  22
  23 #include <stdio.h>
  24 #include <stdlib.h>
  25 #include <string.h>
  26
  27 #include "widl.h"
  28 #include "utils.h"
  29 #include "parser.h"
  30 #include "typetree.h"
  31 #include "header.h"
  32
  33 type_t *duptype(type_t *t, int dupname)
  34 {
  35   type_t *d = alloc_type();
  36
  37   *d = *t;
  38   if (dupname && t->name)
  39     d->name = xstrdup(t->name);
  40
  41   return d;
  42 }
  43
  44 type_t *make_type(enum type_type type)
  45 {
  46     type_t *t = alloc_type();
  47     t->name = NULL;
  48     t->namespace = NULL;
  49     t->type_type = type;
  50     t->attrs = NULL;
  51     t->c_name = NULL;
  52     t->orig = NULL;
  53     memset(&t->details, 0, sizeof(t->details));
  54     t->typestring_offset = 0;
  55     t->ptrdesc = 0;
  56     t->ignore = (parse_only != 0);
  57     t->defined = FALSE;
  58     t->written = FALSE;
  59     t->user_types_registered = FALSE;
  60     t->tfswrite = FALSE;
  61     t->checked = FALSE;
  62     t->is_alias = FALSE;
  63     t->typelib_idx = -1;
  64     init_loc_info(&t->loc_info);
  65     return t;
  66 }
  67
  68 static const var_t *find_arg(const var_list_t *args, const char *name)
  69 {
  70     const var_t *arg;
  71
  72     if (args) LIST_FOR_EACH_ENTRY(arg, args, const var_t, entry)
  73     {
  74         if (arg->name && !strcmp(name, arg->name))
  75             return arg;
  76     }
  77
  78     return NULL;
  79 }
  80
  81 const char *type_get_name(const type_t *type, enum name_type name_type)
  82 {
  83     switch(name_type) {
  84     case NAME_DEFAULT:
  85         return type->name;
  86     case NAME_C:
  87         return type->c_name;
  88     }
  89
  90     assert(0);
  91     return NULL;
  92 }
  93
  94 static char *append_namespace(char *ptr, struct namespace *namespace, const char *separator)
  95 {
  96     if(is_global_namespace(namespace)) {
  97         if(!use_abi_namespace)
  98             return ptr;
  99         strcpy(ptr, "ABI");
 100         strcat(ptr, separator);
 101         return ptr + strlen(ptr);
 102     }
 103
 104     ptr = append_namespace(ptr, namespace->parent, separator);
 105     strcpy(ptr, namespace->name);
 106     strcat(ptr, separator);
 107     return ptr + strlen(ptr);
 108 }
 109
 110 char *format_namespace(struct namespace *namespace, const char *prefix, const char *separator, const char *suffix)
 111 {
 112     unsigned len = strlen(prefix) + strlen(suffix);
 113     unsigned sep_len = strlen(separator);
 114     struct namespace *iter;
 115     char *ret, *ptr;
 116
 117     if(use_abi_namespace && !is_global_namespace(namespace))
 118         len += 3 /* strlen("ABI") */ + sep_len;
 119
 120     for(iter = namespace; !is_global_namespace(iter); iter = iter->parent)
 121         len += strlen(iter->name) + sep_len;
 122
 123     ret = xmalloc(len+1);
 124     strcpy(ret, prefix);
 125     ptr = append_namespace(ret + strlen(ret), namespace, separator);
 126     strcpy(ptr, suffix);
 127
 128     return ret;
 129 }
 130
 131 type_t *type_new_function(var_list_t *args)
 132 {
 133     var_t *arg;
 134     type_t *t;
 135     unsigned int i = 0;
 136
 137     if (args)
 138     {
 139         arg = LIST_ENTRY(list_head(args), var_t, entry);
 140         if (list_count(args) == 1 && !arg->name && arg->type && type_get_type(arg->type) == TYPE_VOID)
 141         {
 142             list_remove(&arg->entry);
 143             free(arg);
 144             free(args);
 145             args = NULL;
 146         }
 147     }
 148     if (args) LIST_FOR_EACH_ENTRY(arg, args, var_t, entry)
 149     {
 150         if (arg->type && type_get_type(arg->type) == TYPE_VOID)
 151             error_loc("argument '%s' has void type\n", arg->name);
 152         if (!arg->name)
 153         {
 154             if (i > 26 * 26)
 155                 error_loc("too many unnamed arguments\n");
 156             else
 157             {
 158                 int unique;
 159                 do
 160                 {
 161                     char name[3];
 162                     name[0] = i > 26 ? 'a' + i / 26 : 'a' + i;
 163                     name[1] = i > 26 ? 'a' + i % 26 : 0;
 164                     name[2] = 0;
 165                     unique = !find_arg(args, name);
 166                     if (unique)
 167                         arg->name = xstrdup(name);
 168                     i++;
 169                 } while (!unique);
 170             }
 171         }
 172     }
 173
 174     t = make_type(TYPE_FUNCTION);
 175     t->details.function = xmalloc(sizeof(*t->details.function));
 176     t->details.function->args = args;
 177     t->details.function->idx = -1;
 178     return t;
 179 }
 180
 181 type_t *type_new_pointer(unsigned char pointer_default, type_t *ref, attr_list_t *attrs)
 182 {
 183     type_t *t = make_type(TYPE_POINTER);
 184     t->details.pointer.def_fc = pointer_default;
 185     t->details.pointer.ref = ref;
 186     t->attrs = attrs;
 187     return t;
 188 }
 189
 190 type_t *type_new_alias(type_t *t, const char *name)
 191 {
 192     type_t *a = duptype(t, 0);
 193
 194     a->name = xstrdup(name);
 195     a->attrs = NULL;
 196     a->orig = t;
 197     a->is_alias = TRUE;
 198     /* for pointer types */
 199     a->details = t->details;
 200     init_loc_info(&a->loc_info);
 201
 202     return a;
 203 }
 204
 205 type_t *type_new_module(char *name)
 206 {
 207     type_t *type = get_type(TYPE_MODULE, name, NULL, 0);
 208     if (type->type_type != TYPE_MODULE || type->defined)
 209         error_loc("%s: redefinition error; original definition was at %s:%d\n",
 210                   type->name, type->loc_info.input_name, type->loc_info.line_number);
 211     type->name = name;
 212     return type;
 213 }
 214
 215 type_t *type_new_coclass(char *name)
 216 {
 217     type_t *type = get_type(TYPE_COCLASS, name, NULL, 0);
 218     if (type->type_type != TYPE_COCLASS || type->defined)
 219         error_loc("%s: redefinition error; original definition was at %s:%d\n",
 220                   type->name, type->loc_info.input_name, type->loc_info.line_number);
 221     type->name = name;
 222     return type;
 223 }
 224
 225
 226 type_t *type_new_array(const char *name, type_t *element, int declptr,
 227                        unsigned int dim, expr_t *size_is, expr_t *length_is,
 228                        unsigned char ptr_default_fc)
 229 {
 230     type_t *t = make_type(TYPE_ARRAY);
 231     if (name) t->name = xstrdup(name);
 232     t->details.array.declptr = declptr;
 233     t->details.array.length_is = length_is;
 234     if (size_is)
 235         t->details.array.size_is = size_is;
 236     else
 237         t->details.array.dim = dim;
 238     t->details.array.elem = element;
 239     t->details.array.ptr_def_fc = ptr_default_fc;
 240     return t;
 241 }
 242
 243 type_t *type_new_basic(enum type_basic_type basic_type)
 244 {
 245     type_t *t = make_type(TYPE_BASIC);
 246     t->details.basic.type = basic_type;
 247     t->details.basic.sign = 0;
 248     return t;
 249 }
 250
 251 type_t *type_new_int(enum type_basic_type basic_type, int sign)
 252 {
 253     static type_t *int_types[TYPE_BASIC_INT_MAX+1][3];
 254
 255     assert(basic_type <= TYPE_BASIC_INT_MAX);
 256
 257     /* map sign { -1, 0, 1 } -> { 0, 1, 2 } */
 258     if (!int_types[basic_type][sign + 1])
 259     {
 260         int_types[basic_type][sign + 1] = type_new_basic(basic_type);
 261         int_types[basic_type][sign + 1]->details.basic.sign = sign;
 262     }
 263     return int_types[basic_type][sign + 1];
 264 }
 265
 266 type_t *type_new_void(void)
 267 {
 268     static type_t *void_type = NULL;
 269     if (!void_type)
 270         void_type = make_type(TYPE_VOID);
 271     return void_type;
 272 }
 273
 274 type_t *type_new_enum(const char *name, struct namespace *namespace, int defined, var_list_t *enums)
 275 {
 276     type_t *tag_type = name ? find_type(name, namespace, tsENUM) : NULL;
 277     type_t *t = make_type(TYPE_ENUM);
 278     t->name = name;
 279     t->namespace = namespace;
 280
 281     if (tag_type && tag_type->details.enumeration)
 282         t->details.enumeration = tag_type->details.enumeration;
 283     else if (defined)
 284     {
 285         t->details.enumeration = xmalloc(sizeof(*t->details.enumeration));
 286         t->details.enumeration->enums = enums;
 287         t->defined = TRUE;
 288     }
 289
 290     if (name)
 291     {
 292         if (defined)
 293             reg_type(t, name, namespace, tsENUM);
 294         else
 295             add_incomplete(t);
 296     }
 297     return t;
 298 }
 299
 300 type_t *type_new_struct(char *name, struct namespace *namespace, int defined, var_list_t *fields)
 301 {
 302     type_t *tag_type = name ? find_type(name, namespace, tsSTRUCT) : NULL;
 303     type_t *t = make_type(TYPE_STRUCT);
 304     t->name = name;
 305     t->namespace = namespace;
 306
 307     if (tag_type && tag_type->details.structure)
 308         t->details.structure = tag_type->details.structure;
 309     else if (defined)
 310     {
 311         t->details.structure = xmalloc(sizeof(*t->details.structure));
 312         t->details.structure->fields = fields;
 313         t->defined = TRUE;
 314     }
 315     if (name)
 316     {
 317         if (defined)
 318             reg_type(t, name, namespace, tsSTRUCT);
 319         else
 320             add_incomplete(t);
 321     }
 322     return t;
 323 }
 324
 325 type_t *type_new_nonencapsulated_union(const char *name, int defined, var_list_t *fields)
 326 {
 327     type_t *tag_type = name ? find_type(name, NULL, tsUNION) : NULL;
 328     type_t *t = make_type(TYPE_UNION);
 329     t->name = name;
 330     if (tag_type && tag_type->details.structure)
 331         t->details.structure = tag_type->details.structure;
 332     else if (defined)
 333     {
 334         t->details.structure = xmalloc(sizeof(*t->details.structure));
 335         t->details.structure->fields = fields;
 336         t->defined = TRUE;
 337     }
 338     if (name)
 339     {
 340         if (defined)
 341             reg_type(t, name, NULL, tsUNION);
 342         else
 343             add_incomplete(t);
 344     }
 345     return t;
 346 }
 347
 348 type_t *type_new_encapsulated_union(char *name, var_t *switch_field, var_t *union_field, var_list_t *cases)
 349 {
 350     type_t *t = get_type(TYPE_ENCAPSULATED_UNION, name, NULL, tsUNION);
 351     if (!union_field) union_field = make_var( xstrdup("tagged_union") );
 352     union_field->type = type_new_nonencapsulated_union(NULL, TRUE, cases);
 353     t->details.structure = xmalloc(sizeof(*t->details.structure));
 354     t->details.structure->fields = append_var( NULL, switch_field );
 355     t->details.structure->fields = append_var( t->details.structure->fields, union_field );
 356     t->defined = TRUE;
 357     return t;
 358 }
 359
 360 static int is_valid_bitfield_type(const type_t *type)
 361 {
 362     switch (type_get_type(type))
 363     {
 364     case TYPE_ENUM:
 365         return TRUE;
 366     case TYPE_BASIC:
 367         switch (type_basic_get_type(type))
 368         {
 369         case TYPE_BASIC_INT8:
 370         case TYPE_BASIC_INT16:
 371         case TYPE_BASIC_INT32:
 372         case TYPE_BASIC_INT64:
 373         case TYPE_BASIC_INT:
 374         case TYPE_BASIC_INT3264:
 375         case TYPE_BASIC_CHAR:
 376         case TYPE_BASIC_HYPER:
 377         case TYPE_BASIC_BYTE:
 378         case TYPE_BASIC_WCHAR:
 379         case TYPE_BASIC_ERROR_STATUS_T:
 380             return TRUE;
 381         case TYPE_BASIC_FLOAT:
 382         case TYPE_BASIC_DOUBLE:
 383         case TYPE_BASIC_HANDLE:
 384             return FALSE;
 385         }
 386         return FALSE;
 387     default:
 388         return FALSE;
 389     }
 390 }
 391
 392 type_t *type_new_bitfield(type_t *field, const expr_t *bits)
 393 {
 394     type_t *t;
 395
 396     if (!is_valid_bitfield_type(field))
 397         error_loc("bit-field has invalid type\n");
 398
 399     if (bits->cval < 0)
 400         error_loc("negative width for bit-field\n");
 401
 402     /* FIXME: validate bits->cval <= memsize(field) * 8 */
 403
 404     t = make_type(TYPE_BITFIELD);
 405     t->details.bitfield.field = field;
 406     t->details.bitfield.bits = bits;
 407     return t;
 408 }
 409
 410 static int compute_method_indexes(type_t *iface)
 411 {
 412     int idx;
 413     statement_t *stmt;
 414
 415     if (!iface->details.iface)
 416         return 0;
 417
 418     if (type_iface_get_inherit(iface))
 419         idx = compute_method_indexes(type_iface_get_inherit(iface));
 420     else
 421         idx = 0;
 422
 423     STATEMENTS_FOR_EACH_FUNC( stmt, type_iface_get_stmts(iface) )
 424     {
 425         var_t *func = stmt->u.var;
 426         if (!is_callas(func->attrs))
 427             func->type->details.function->idx = idx++;
 428     }
 429
 430     return idx;
 431 }
 432
 433 void type_interface_define(type_t *iface, type_t *inherit, statement_list_t *stmts)
 434 {
 435     iface->details.iface = xmalloc(sizeof(*iface->details.iface));
 436     iface->details.iface->disp_props = NULL;
 437     iface->details.iface->disp_methods = NULL;
 438     iface->details.iface->stmts = stmts;
 439     iface->details.iface->inherit = inherit;
 440     iface->defined = TRUE;
 441     compute_method_indexes(iface);
 442 }
 443
 444 void type_dispinterface_define(type_t *iface, var_list_t *props, var_list_t *methods)
 445 {
 446     iface->details.iface = xmalloc(sizeof(*iface->details.iface));
 447     iface->details.iface->disp_props = props;
 448     iface->details.iface->disp_methods = methods;
 449     iface->details.iface->stmts = NULL;
 450     iface->details.iface->inherit = find_type("IDispatch", NULL, 0);
 451     if (!iface->details.iface->inherit) error_loc("IDispatch is undefined\n");
 452     iface->defined = TRUE;
 453     compute_method_indexes(iface);
 454 }
 455
 456 void type_dispinterface_define_from_iface(type_t *dispiface, type_t *iface)
 457 {
 458     type_dispinterface_define(dispiface, iface->details.iface->disp_props,
 459                               iface->details.iface->disp_methods);
 460 }
 461
 462 void type_module_define(type_t *module, statement_list_t *stmts)
 463 {
 464     if (module->details.module) error_loc("multiple definition error\n");
 465     module->details.module = xmalloc(sizeof(*module->details.module));
 466     module->details.module->stmts = stmts;
 467     module->defined = TRUE;
 468 }
 469
 470 type_t *type_coclass_define(type_t *coclass, ifref_list_t *ifaces)
 471 {
 472     coclass->details.coclass.ifaces = ifaces;
 473     coclass->defined = TRUE;
 474     return coclass;
 475 }
 476
 477 int type_is_equal(const type_t *type1, const type_t *type2)
 478 {
 479     if (type_get_type_detect_alias(type1) != type_get_type_detect_alias(type2))
 480         return FALSE;
 481
 482     if (type1->name && type2->name)
 483         return !strcmp(type1->name, type2->name);
 484     else if ((!type1->name && type2->name) || (type1->name && !type2->name))
 485         return FALSE;
 486
 487     /* FIXME: do deep inspection of types to determine if they are equal */
 488
 489     return FALSE;
 490 }