nsz Git - cparser/blob - wrappergen/write_jna.c

   1 /*
   2  * This file is part of cparser.
   3  * Copyright (C) 2007-2009 Matthias Braun <matze@braunis.de>
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License
   7  * as published by the Free Software Foundation; either version 2
   8  * of the License, or (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  18  * 02111-1307, USA.
  19  */
  20 #include <config.h>
  21
  22 #include <errno.h>
  23 #include <string.h>
  24
  25 #include "write_jna.h"
  26 #include "symbol_t.h"
  27 #include "ast_t.h"
  28 #include "type_t.h"
  29 #include "entity_t.h"
  30 #include "type.h"
  31 #include "printer.h"
  32 #include "adt/error.h"
  33 #include "adt/xmalloc.h"
  34 #include <libfirm/adt/pset_new.h>
  35
  36 typedef struct output_limit {
  37         const char          *filename;
  38         struct output_limit *next;
  39 } output_limit;
  40
  41 static const scope_t *global_scope;
  42 static FILE          *out;
  43 static pset_new_t     avoid_symbols;
  44 static output_limit  *output_limits;
  45 static const char    *libname;
  46
  47 static bool is_system_header(const char *fname)
  48 {
  49         if (strncmp(fname, "/usr/include", 12) == 0)
  50                 return true;
  51         if (fname == builtin_source_position.input_name)
  52                 return true;
  53         return false;
  54 }
  55
  56 static const char *fix_builtin_names(const char *name)
  57 {
  58         if (strcmp(name, "class") == 0) {
  59                 return "_class";
  60         } else if(strcmp(name, "this") == 0) {
  61                 return "_this";
  62         } else if(strcmp(name, "public") == 0) {
  63                 return "_public";
  64         } else if(strcmp(name, "protected") == 0) {
  65                 return "_protected";
  66         } else if(strcmp(name, "private") == 0) {
  67                 return "_private";
  68         } else if(strcmp(name, "final") == 0) {
  69                 return "_final";
  70         }
  71         /* TODO put all reserved names here */
  72         return name;
  73 }
  74
  75 static const char *get_atomic_type_string(const atomic_type_kind_t type)
  76 {
  77         switch(type) {
  78         case ATOMIC_TYPE_VOID:        return "void";
  79         case ATOMIC_TYPE_CHAR:        return "byte";
  80         case ATOMIC_TYPE_SCHAR:       return "byte";
  81         case ATOMIC_TYPE_UCHAR:       return "byte";
  82         case ATOMIC_TYPE_SHORT:       return "short";
  83         case ATOMIC_TYPE_USHORT:      return "short";
  84         case ATOMIC_TYPE_INT:         return "int";
  85         case ATOMIC_TYPE_UINT:        return "int";
  86         case ATOMIC_TYPE_LONG:        return "com.sun.jna.NativeLong";
  87         case ATOMIC_TYPE_ULONG:       return "com.sun.jna.NativeLong";
  88         case ATOMIC_TYPE_LONGLONG:    return "long";
  89         case ATOMIC_TYPE_ULONGLONG:   return "long";
  90         case ATOMIC_TYPE_FLOAT:       return "float";
  91         case ATOMIC_TYPE_DOUBLE:      return "double";
  92         case ATOMIC_TYPE_BOOL:        return "boolean";
  93         default:                      panic("unsupported atomic type");
  94         }
  95 }
  96
  97 static void write_atomic_type(const atomic_type_t *type)
  98 {
  99         fputs(get_atomic_type_string(type->akind), out);
 100 }
 101
 102 static void write_pointer_type(const pointer_type_t *type)
 103 {
 104         type_t *points_to = skip_typeref(type->points_to);
 105         if (is_type_atomic(points_to, ATOMIC_TYPE_CHAR)) {
 106                 fputs("String", out);
 107                 return;
 108         }
 109         if (is_type_pointer(points_to)) {
 110                 /* hack... */
 111                 fputs("java.nio.Buffer", out);
 112                 return;
 113         }
 114         fputs("Pointer", out);
 115 }
 116
 117 static entity_t *find_typedef(const type_t *type)
 118 {
 119         /* first: search for a matching typedef in the global type... */
 120         entity_t *entity = global_scope->entities;
 121         for ( ; entity != NULL; entity = entity->base.next) {
 122                 if (entity->kind != ENTITY_TYPEDEF)
 123                         continue;
 124                 if (entity->typedefe.type == type)
 125                         break;
 126         }
 127
 128         return entity;
 129 }
 130
 131 static entity_t *find_enum_typedef(const enum_t *enume)
 132 {
 133         /* first: search for a matching typedef in the global type... */
 134         entity_t *entity = global_scope->entities;
 135         for ( ; entity != NULL; entity = entity->base.next) {
 136                 if (entity->kind != ENTITY_TYPEDEF)
 137                         continue;
 138                 type_t *type = entity->typedefe.type;
 139                 if (type->kind != TYPE_ENUM)
 140                         continue;
 141
 142                 enum_t *e_entity = type->enumt.enume;
 143                 if (e_entity == enume)
 144                         break;
 145         }
 146
 147         return entity;
 148 }
 149
 150 static void write_compound_type(const compound_type_t *type)
 151 {
 152         entity_t *entity = find_typedef((const type_t*) type);
 153         if(entity != NULL) {
 154                 fputs(entity->base.symbol->string, out);
 155                 return;
 156         }
 157
 158         /* does the struct have a name? */
 159         symbol_t *symbol = type->compound->base.symbol;
 160         if(symbol != NULL) {
 161                 /* TODO: make sure we create a struct for it... */
 162                 fputs(symbol->string, out);
 163                 return;
 164         }
 165         /* TODO: create a struct and use its name here... */
 166         fputs("/* TODO anonymous struct */byte", out);
 167 }
 168
 169 static void write_enum_name(const enum_type_t *type)
 170 {
 171         entity_t *entity = find_typedef((const type_t*) type);
 172         if (entity != NULL) {
 173                 fputs(entity->base.symbol->string, out);
 174                 return;
 175         }
 176
 177         /* does the enum have a name? */
 178         symbol_t *symbol = type->enume->base.symbol;
 179         if (symbol != NULL) {
 180                 /* TODO: make sure we create an enum for it... */
 181                 fputs(symbol->string, out);
 182                 return;
 183         }
 184
 185         /* now we have a problem as we don't know how we'll call the anonymous
 186          * enum */
 187         panic("can't reference entries from anonymous enums yet");
 188 }
 189
 190 static void write_enum_type(const enum_type_t *type)
 191 {
 192         entity_t *entity = find_typedef((const type_t*) type);
 193         if (entity != NULL) {
 194                 fprintf(out, "/* %s */int", entity->base.symbol->string);
 195                 return;
 196         }
 197
 198         /* does the enum have a name? */
 199         symbol_t *symbol = type->enume->base.symbol;
 200         if (symbol != NULL) {
 201                 /* TODO: make sure we create an enum for it... */
 202                 fprintf(out, "/* %s */int", symbol->string);
 203                 return;
 204         }
 205         fprintf(out, "/* anonymous enum */int");
 206 }
 207
 208 static void write_type(type_t *type)
 209 {
 210         type = skip_typeref(type);
 211         switch(type->kind) {
 212         case TYPE_ATOMIC:
 213                 write_atomic_type(&type->atomic);
 214                 return;
 215         case TYPE_POINTER:
 216                 write_pointer_type(&type->pointer);
 217                 return;
 218         case TYPE_COMPOUND_UNION:
 219         case TYPE_COMPOUND_STRUCT:
 220                 write_compound_type(&type->compound);
 221                 return;
 222         case TYPE_ENUM:
 223                 write_enum_type(&type->enumt);
 224                 return;
 225         case TYPE_ERROR:
 226         case TYPE_INVALID:
 227         case TYPE_TYPEOF:
 228         case TYPE_TYPEDEF:
 229                 panic("invalid type found");
 230         case TYPE_ARRAY:
 231         case TYPE_BITFIELD:
 232         case TYPE_REFERENCE:
 233         case TYPE_FUNCTION:
 234         case TYPE_COMPLEX:
 235         case TYPE_IMAGINARY:
 236                 fprintf(out, "/* TODO type */Pointer");
 237                 break;
 238         }
 239 }
 240
 241 #if 0
 242 static void write_compound_entry(const entity_t *entity)
 243 {
 244         fprintf(out, "\t%s : ", entity->base.symbol->string);
 245         write_type(entity->declaration.type);
 246         fprintf(out, "\n");
 247 }
 248
 249 static void write_compound(const symbol_t *symbol, const compound_type_t *type)
 250 {
 251         fprintf(out, "%s %s:\n",
 252                 type->base.kind == TYPE_COMPOUND_STRUCT ? "struct" : "union",
 253                         symbol->string);
 254
 255         const entity_t *entity = type->compound->members.entities;
 256         for ( ; entity != NULL; entity = entity->base.next) {
 257                 write_compound_entry(entity);
 258         }
 259
 260         fprintf(out, "\n");
 261 }
 262 #endif
 263
 264 static void write_expression(const expression_t *expression);
 265
 266 static void write_unary_expression(const unary_expression_t *expression)
 267 {
 268         switch(expression->base.kind) {
 269         case EXPR_UNARY_NEGATE:
 270                 fputc('-', out);
 271                 break;
 272         case EXPR_UNARY_NOT:
 273                 fputc('!', out);
 274                 break;
 275         case EXPR_UNARY_CAST_IMPLICIT:
 276                 write_expression(expression->value);
 277                 return;
 278         default:
 279                 panic("unimeplemented unary expression found");
 280         }
 281         write_expression(expression->value);
 282 }
 283
 284 static void write_binary_expression(const binary_expression_t *expression)
 285 {
 286         fputs("(", out);
 287         write_expression(expression->left);
 288         fputc(' ', out);
 289         switch(expression->base.kind) {
 290         case EXPR_BINARY_BITWISE_OR:  fputs("|", out); break;
 291         case EXPR_BINARY_BITWISE_AND: fputs("&", out); break;
 292         case EXPR_BINARY_BITWISE_XOR: fputs("^", out); break;
 293         case EXPR_BINARY_SHIFTLEFT:   fputs("<<", out); break;
 294         case EXPR_BINARY_SHIFTRIGHT:  fputs(">>", out); break;
 295         case EXPR_BINARY_ADD:         fputs("+", out); break;
 296         case EXPR_BINARY_SUB:         fputs("-", out); break;
 297         case EXPR_BINARY_MUL:         fputs("*", out); break;
 298         case EXPR_BINARY_DIV:         fputs("/", out); break;
 299         default:
 300                 panic("unimplemented binexpr");
 301         }
 302         fputc(' ', out);
 303         write_expression(expression->right);
 304         fputs(")", out);
 305 }
 306
 307 static void write_expression(const expression_t *expression)
 308 {
 309         /* TODO */
 310         switch(expression->kind) {
 311         case EXPR_LITERAL_INTEGER:
 312         case EXPR_LITERAL_INTEGER_OCTAL:
 313                 fprintf(out, "%s", expression->literal.value.begin);
 314                 break;
 315         case EXPR_LITERAL_INTEGER_HEXADECIMAL:
 316                 fprintf(out, "0x%s", expression->literal.value.begin);
 317                 break;
 318         case EXPR_REFERENCE_ENUM_VALUE: {
 319                 /* UHOH... hacking */
 320                 entity_t *entity = expression->reference.entity;
 321                 write_enum_name(& entity->enum_value.enum_type->enumt);
 322                 fprintf(out, ".%s.val", entity->base.symbol->string);
 323                 break;
 324         }
 325         EXPR_UNARY_CASES
 326                 write_unary_expression(&expression->unary);
 327                 break;
 328         EXPR_BINARY_CASES
 329                 write_binary_expression(&expression->binary);
 330                 break;
 331         default:
 332                 panic("not implemented expression");
 333         }
 334 }
 335
 336 static void write_enum(const symbol_t *symbol, const enum_t *entity)
 337 {
 338         char buf[128];
 339         const char *name;
 340
 341         if (symbol == NULL) {
 342                 static int lastenum = 0;
 343                 snprintf(buf, sizeof(buf), "AnonEnum%d", lastenum++);
 344                 name = buf;
 345         } else {
 346                 name = symbol->string;
 347         }
 348
 349         fprintf(out, "\tpublic static enum %s {\n", name);
 350
 351         entity_t *entry = entity->base.next;
 352         for ( ; entry != NULL && entry->kind == ENTITY_ENUM_VALUE;
 353                         entry = entry->base.next) {
 354                 fprintf(out, "\t\t%s", entry->base.symbol->string);
 355                 fprintf(out, "(");
 356                 if(entry->enum_value.value != NULL) {
 357                         write_expression(entry->enum_value.value);
 358                 }
 359                 fprintf(out, ")");
 360                 if (entry->base.next != NULL
 361                                 && entry->base.next->kind == ENTITY_ENUM_VALUE) {
 362                         fputs(",\n", out);
 363                 } else {
 364                         fputs(";\n", out);
 365                 }
 366         }
 367         fprintf(out, "\t\tpublic final int val;\n");
 368         fprintf(out, "\n");
 369         fprintf(out, "\t\tprivate static class C {\n");
 370         fprintf(out, "\t\t\tstatic int next_val;\n");
 371         fprintf(out, "\t\t}\n");
 372         fprintf(out, "\n");
 373         fprintf(out, "\t\t%s(int val) {\n", name);
 374         fprintf(out, "\t\t\tthis.val = val;\n");
 375         fprintf(out, "\t\t\tC.next_val = val + 1;\n");
 376         fprintf(out, "\t\t}\n");
 377         fprintf(out, "\n");
 378         fprintf(out, "\t\t%s() {\n", name);
 379         fprintf(out, "\t\t\tthis.val = C.next_val++;\n");
 380         fprintf(out, "\t\t}\n");
 381         fprintf(out, "\n");
 382         fprintf(out, "\t\tpublic static %s getEnum(int val) {\n", name);
 383         fprintf(out, "\t\t\tfor (%s entry : values()) {\n", name);
 384         fprintf(out, "\t\t\t\tif (val == entry.val)\n");
 385         fprintf(out, "\t\t\t\t\treturn entry;\n");
 386         fprintf(out, "\t\t\t}\n");
 387         fprintf(out, "\t\t\treturn null;\n");
 388         fprintf(out, "\t\t}\n");
 389         fprintf(out, "\t}\n");
 390         fprintf(out, "\n");
 391 }
 392
 393 #if 0
 394 static void write_variable(const entity_t *entity)
 395 {
 396         fprintf(out, "var %s : ", entity->base.symbol->string);
 397         write_type(entity->declaration.type);
 398         fprintf(out, "\n");
 399 }
 400 #endif
 401
 402 static void write_function(const entity_t *entity)
 403 {
 404         if (entity->function.statement != NULL) {
 405                 fprintf(stderr, "Warning: can't convert function bodies (at %s)\n",
 406                         entity->base.symbol->string);
 407                 return;
 408         }
 409
 410
 411         const function_type_t *function_type
 412                 = (const function_type_t*) entity->declaration.type;
 413
 414         fputc('\n', out);
 415         fprintf(out, "\tpublic static native ");
 416         type_t *return_type = skip_typeref(function_type->return_type);
 417         write_type(return_type);
 418         fprintf(out, " %s(", entity->base.symbol->string);
 419
 420         entity_t *parameter = entity->function.parameters.entities;
 421         int       first     = 1;
 422         int       n         = 0;
 423         for ( ; parameter != NULL; parameter = parameter->base.next) {
 424                 assert(parameter->kind == ENTITY_PARAMETER);
 425                 if(!first) {
 426                         fprintf(out, ", ");
 427                 } else {
 428                         first = 0;
 429                 }
 430                 write_type(parameter->declaration.type);
 431                 if(parameter->base.symbol != NULL) {
 432                         fprintf(out, " %s", fix_builtin_names(parameter->base.symbol->string));
 433                 } else {
 434                         fprintf(out, " _%d", n++);
 435                 }
 436         }
 437         if(function_type->variadic) {
 438                 if(!first) {
 439                         fprintf(out, ", ");
 440                 } else {
 441                         first = 0;
 442                 }
 443                 fputs("Object ... args", out);
 444         }
 445         fprintf(out, ");\n");
 446 }
 447
 448 void jna_limit_output(const char *filename)
 449 {
 450         output_limit *limit = xmalloc(sizeof(limit[0]));
 451         limit->filename = filename;
 452
 453         limit->next   = output_limits;
 454         output_limits = limit;
 455 }
 456
 457 void jna_set_libname(const char *new_libname)
 458 {
 459         libname = new_libname;
 460 }
 461
 462 void write_jna_decls(FILE *output, const translation_unit_t *unit)
 463 {
 464         out          = output;
 465         global_scope = &unit->scope;
 466
 467         pset_new_init(&avoid_symbols);
 468
 469         print_to_file(out);
 470         fprintf(out, "/* WARNING: Automatically generated file */\n");
 471         fputs("import com.sun.jna.Native;\n", out);
 472         fputs("import com.sun.jna.Pointer;\n", out);
 473         fputs("\n", out);
 474
 475         const char *register_libname = libname;
 476         if (register_libname == NULL)
 477                 register_libname = "library";
 478
 479         /* TODO: where to get the name from? */
 480         fputs("public class binding {\n", out);
 481         fputs("\tstatic {\n", out);
 482         fprintf(out, "\t\tNative.register(\"%s\");\n", register_libname);
 483         fputs("\t}\n", out);
 484         fputs("\n", out);
 485
 486         /* read the avoid list */
 487         FILE *avoid = fopen("avoid.config", "r");
 488         if (avoid != NULL) {
 489                 while (!feof(avoid)) {
 490                         char buf[1024];
 491                         char *res = fgets(buf, sizeof(buf), avoid);
 492                         if (res == NULL)
 493                                 break;
 494                         if (buf[0] == 0)
 495                                 continue;
 496
 497                         size_t len = strlen(buf);
 498                         if (buf[len-1] == '\n')
 499                                 buf[len-1] = 0;
 500
 501                         char *str = malloc(len+1);
 502                         memcpy(str, buf, len+1);
 503                         symbol_t *symbol = symbol_table_insert(str);
 504                         pset_new_insert(&avoid_symbols, symbol);
 505                 }
 506                 fclose(avoid);
 507         }
 508
 509         /* write structs,unions + enums */
 510         entity_t *entity = unit->scope.entities;
 511         for ( ; entity != NULL; entity = entity->base.next) {
 512                 if (entity->kind == ENTITY_ENUM) {
 513                         if (find_enum_typedef(&entity->enume) != NULL)
 514                                 continue;
 515                         write_enum(entity->base.symbol, &entity->enume);
 516                 } else if (entity->kind == ENTITY_TYPEDEF) {
 517                         type_t *type = entity->typedefe.type;
 518                         if (type->kind == TYPE_ENUM) {
 519                                 write_enum(entity->base.symbol, type->enumt.enume);
 520                         }
 521                 }
 522
 523 #if 0
 524                 if(type->kind == TYPE_COMPOUND_STRUCT
 525                                 || type->kind == TYPE_COMPOUND_UNION) {
 526                         write_compound(entity->base.symbol, &type->compound);
 527                 }
 528 #endif
 529         }
 530
 531         /* write functions */
 532         entity = unit->scope.entities;
 533         for ( ; entity != NULL; entity = entity->base.next) {
 534                 if (entity->kind != ENTITY_FUNCTION)
 535                         continue;
 536                 const char *input_name = entity->base.source_position.input_name;
 537                 if (is_system_header(input_name))
 538                         continue;
 539                 if (entity->function.elf_visibility != ELF_VISIBILITY_DEFAULT)
 540                         continue;
 541                 if (output_limits != NULL) {
 542                         bool in_limits = false;
 543                         for (output_limit *limit = output_limits; limit != NULL;
 544                              limit = limit->next) {
 545                             if (strcmp(limit->filename, input_name) == 0) {
 546                                         in_limits = true;
 547                                         break;
 548                                 }
 549                         }
 550                         if (!in_limits)
 551                                 continue;
 552                 }
 553
 554                 if (pset_new_contains(&avoid_symbols, entity->base.symbol))
 555                         continue;
 556                 write_function(entity);
 557         }
 558
 559         fputs("}\n", out);
 560
 561         pset_new_destroy(&avoid_symbols);
 562 }