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 void write_type(type_t *type);
  48
  49 static bool is_system_header(const char *fname)
  50 {
  51         if (strncmp(fname, "/usr/include", 12) == 0)
  52                 return true;
  53         if (fname == builtin_source_position.input_name)
  54                 return true;
  55         return false;
  56 }
  57
  58 static const char *fix_builtin_names(const char *name)
  59 {
  60         if (strcmp(name, "class") == 0) {
  61                 return "_class";
  62         } else if(strcmp(name, "this") == 0) {
  63                 return "_this";
  64         } else if(strcmp(name, "public") == 0) {
  65                 return "_public";
  66         } else if(strcmp(name, "protected") == 0) {
  67                 return "_protected";
  68         } else if(strcmp(name, "private") == 0) {
  69                 return "_private";
  70         } else if(strcmp(name, "final") == 0) {
  71                 return "_final";
  72         }
  73         /* TODO put all reserved names here */
  74         return name;
  75 }
  76
  77 static const char *get_atomic_type_string(const atomic_type_kind_t type)
  78 {
  79         switch(type) {
  80         case ATOMIC_TYPE_VOID:        return "void";
  81         case ATOMIC_TYPE_CHAR:        return "byte";
  82         case ATOMIC_TYPE_SCHAR:       return "byte";
  83         case ATOMIC_TYPE_UCHAR:       return "byte";
  84         case ATOMIC_TYPE_SHORT:       return "short";
  85         case ATOMIC_TYPE_USHORT:      return "short";
  86         case ATOMIC_TYPE_INT:         return "int";
  87         case ATOMIC_TYPE_UINT:        return "int";
  88         case ATOMIC_TYPE_LONG:        return "com.sun.jna.NativeLong";
  89         case ATOMIC_TYPE_ULONG:       return "com.sun.jna.NativeLong";
  90         case ATOMIC_TYPE_LONGLONG:    return "long";
  91         case ATOMIC_TYPE_ULONGLONG:   return "long";
  92         case ATOMIC_TYPE_FLOAT:       return "float";
  93         case ATOMIC_TYPE_DOUBLE:      return "double";
  94         case ATOMIC_TYPE_BOOL:        return "boolean";
  95         default:                      panic("unsupported atomic type");
  96         }
  97 }
  98
  99 static void write_atomic_type(const atomic_type_t *type)
 100 {
 101         fputs(get_atomic_type_string(type->akind), out);
 102 }
 103
 104 static void write_pointer_type(const pointer_type_t *type)
 105 {
 106         type_t *points_to = skip_typeref(type->points_to);
 107         if (is_type_atomic(points_to, ATOMIC_TYPE_CHAR)) {
 108                 fputs("String", out);
 109                 return;
 110         }
 111         if (is_type_pointer(points_to)) {
 112                 /* hack... */
 113                 fputs("java.nio.Buffer", out);
 114                 return;
 115         }
 116         fputs("Pointer", out);
 117 }
 118
 119 static entity_t *find_typedef(const type_t *type)
 120 {
 121         /* first: search for a matching typedef in the global type... */
 122         entity_t *entity = global_scope->entities;
 123         for ( ; entity != NULL; entity = entity->base.next) {
 124                 if (entity->kind != ENTITY_TYPEDEF)
 125                         continue;
 126                 if (entity->typedefe.type == type)
 127                         break;
 128         }
 129
 130         return entity;
 131 }
 132
 133 static entity_t *find_enum_typedef(const enum_t *enume)
 134 {
 135         /* first: search for a matching typedef in the global type... */
 136         entity_t *entity = global_scope->entities;
 137         for ( ; entity != NULL; entity = entity->base.next) {
 138                 if (entity->kind != ENTITY_TYPEDEF)
 139                         continue;
 140                 type_t *type = entity->typedefe.type;
 141                 if (type->kind != TYPE_ENUM)
 142                         continue;
 143
 144                 enum_t *e_entity = type->enumt.enume;
 145                 if (e_entity == enume)
 146                         break;
 147         }
 148
 149         return entity;
 150 }
 151
 152 static void write_compound_type(const compound_type_t *type)
 153 {
 154         entity_t *entity = find_typedef((const type_t*) type);
 155         if(entity != NULL) {
 156                 fputs(entity->base.symbol->string, out);
 157                 return;
 158         }
 159
 160         /* does the struct have a name? */
 161         symbol_t *symbol = type->compound->base.symbol;
 162         if(symbol != NULL) {
 163                 /* TODO: make sure we create a struct for it... */
 164                 fputs(symbol->string, out);
 165                 return;
 166         }
 167         /* TODO: create a struct and use its name here... */
 168         fputs("/* TODO anonymous struct */byte", out);
 169 }
 170
 171 static void write_enum_name(const enum_type_t *type)
 172 {
 173         entity_t *entity = find_typedef((const type_t*) type);
 174         if (entity != NULL) {
 175                 fputs(entity->base.symbol->string, out);
 176                 return;
 177         }
 178
 179         /* does the enum have a name? */
 180         symbol_t *symbol = type->enume->base.symbol;
 181         if (symbol != NULL) {
 182                 /* TODO: make sure we create an enum for it... */
 183                 fputs(symbol->string, out);
 184                 return;
 185         }
 186
 187         /* now we have a problem as we don't know how we'll call the anonymous
 188          * enum */
 189         panic("can't reference entries from anonymous enums yet");
 190 }
 191
 192 static void write_enum_type(const enum_type_t *type)
 193 {
 194         entity_t *entity = find_typedef((const type_t*) type);
 195         if (entity != NULL) {
 196                 fprintf(out, "/* %s */int", entity->base.symbol->string);
 197                 return;
 198         }
 199
 200         /* does the enum have a name? */
 201         symbol_t *symbol = type->enume->base.symbol;
 202         if (symbol != NULL) {
 203                 /* TODO: make sure we create an enum for it... */
 204                 fprintf(out, "/* %s */int", symbol->string);
 205                 return;
 206         }
 207         fprintf(out, "/* anonymous enum */int");
 208 }
 209
 210 static void write_type(type_t *type)
 211 {
 212         type = skip_typeref(type);
 213         switch(type->kind) {
 214         case TYPE_ATOMIC:
 215                 write_atomic_type(&type->atomic);
 216                 return;
 217         case TYPE_POINTER:
 218                 write_pointer_type(&type->pointer);
 219                 return;
 220         case TYPE_COMPOUND_UNION:
 221         case TYPE_COMPOUND_STRUCT:
 222                 write_compound_type(&type->compound);
 223                 return;
 224         case TYPE_ENUM:
 225                 write_enum_type(&type->enumt);
 226                 return;
 227         case TYPE_BUILTIN:
 228                 write_type(type->builtin.real_type);
 229                 return;
 230         case TYPE_ERROR:
 231         case TYPE_INVALID:
 232         case TYPE_TYPEOF:
 233         case TYPE_TYPEDEF:
 234                 panic("invalid type found");
 235         case TYPE_ARRAY:
 236         case TYPE_BITFIELD:
 237         case TYPE_REFERENCE:
 238         case TYPE_FUNCTION:
 239         case TYPE_COMPLEX:
 240         case TYPE_IMAGINARY:
 241                 fprintf(out, "/* TODO type */Pointer");
 242                 break;
 243         }
 244 }
 245
 246 #if 0
 247 static void write_compound_entry(const entity_t *entity)
 248 {
 249         fprintf(out, "\t%s : ", entity->base.symbol->string);
 250         write_type(entity->declaration.type);
 251         fprintf(out, "\n");
 252 }
 253
 254 static void write_compound(const symbol_t *symbol, const compound_type_t *type)
 255 {
 256         fprintf(out, "%s %s:\n",
 257                 type->base.kind == TYPE_COMPOUND_STRUCT ? "struct" : "union",
 258                         symbol->string);
 259
 260         const entity_t *entity = type->compound->members.entities;
 261         for ( ; entity != NULL; entity = entity->base.next) {
 262                 write_compound_entry(entity);
 263         }
 264
 265         fprintf(out, "\n");
 266 }
 267 #endif
 268
 269 static void write_expression(const expression_t *expression);
 270
 271 static void write_unary_expression(const unary_expression_t *expression)
 272 {
 273         switch(expression->base.kind) {
 274         case EXPR_UNARY_NEGATE:
 275                 fputc('-', out);
 276                 break;
 277         case EXPR_UNARY_NOT:
 278                 fputc('!', out);
 279                 break;
 280         case EXPR_UNARY_CAST_IMPLICIT:
 281                 write_expression(expression->value);
 282                 return;
 283         default:
 284                 panic("unimeplemented unary expression found");
 285         }
 286         write_expression(expression->value);
 287 }
 288
 289 static void write_binary_expression(const binary_expression_t *expression)
 290 {
 291         fputs("(", out);
 292         write_expression(expression->left);
 293         fputc(' ', out);
 294         switch(expression->base.kind) {
 295         case EXPR_BINARY_BITWISE_OR:  fputs("|", out); break;
 296         case EXPR_BINARY_BITWISE_AND: fputs("&", out); break;
 297         case EXPR_BINARY_BITWISE_XOR: fputs("^", out); break;
 298         case EXPR_BINARY_SHIFTLEFT:   fputs("<<", out); break;
 299         case EXPR_BINARY_SHIFTRIGHT:  fputs(">>", out); break;
 300         case EXPR_BINARY_ADD:         fputs("+", out); break;
 301         case EXPR_BINARY_SUB:         fputs("-", out); break;
 302         case EXPR_BINARY_MUL:         fputs("*", out); break;
 303         case EXPR_BINARY_DIV:         fputs("/", out); break;
 304         default:
 305                 panic("unimplemented binexpr");
 306         }
 307         fputc(' ', out);
 308         write_expression(expression->right);
 309         fputs(")", out);
 310 }
 311
 312 static void write_expression(const expression_t *expression)
 313 {
 314         /* TODO */
 315         switch(expression->kind) {
 316         case EXPR_LITERAL_INTEGER:
 317         case EXPR_LITERAL_INTEGER_OCTAL:
 318                 fprintf(out, "%s", expression->literal.value.begin);
 319                 break;
 320         case EXPR_LITERAL_INTEGER_HEXADECIMAL:
 321                 fprintf(out, "0x%s", expression->literal.value.begin);
 322                 break;
 323         case EXPR_REFERENCE_ENUM_VALUE: {
 324                 /* UHOH... hacking */
 325                 entity_t *entity = expression->reference.entity;
 326                 write_enum_name(& entity->enum_value.enum_type->enumt);
 327                 fprintf(out, ".%s.val", entity->base.symbol->string);
 328                 break;
 329         }
 330         EXPR_UNARY_CASES
 331                 write_unary_expression(&expression->unary);
 332                 break;
 333         EXPR_BINARY_CASES
 334                 write_binary_expression(&expression->binary);
 335                 break;
 336         default:
 337                 panic("not implemented expression");
 338         }
 339 }
 340
 341 static void write_enum(const symbol_t *symbol, const enum_t *entity)
 342 {
 343         char buf[128];
 344         const char *name;
 345
 346         if (symbol == NULL) {
 347                 static int lastenum = 0;
 348                 snprintf(buf, sizeof(buf), "AnonEnum%d", lastenum++);
 349                 name = buf;
 350         } else {
 351                 name = symbol->string;
 352         }
 353
 354         fprintf(out, "\tpublic static enum %s {\n", name);
 355
 356         entity_t *entry = entity->base.next;
 357         for ( ; entry != NULL && entry->kind == ENTITY_ENUM_VALUE;
 358                         entry = entry->base.next) {
 359                 fprintf(out, "\t\t%s", entry->base.symbol->string);
 360                 fprintf(out, "(");
 361                 if(entry->enum_value.value != NULL) {
 362                         write_expression(entry->enum_value.value);
 363                 }
 364                 fprintf(out, ")");
 365                 if (entry->base.next != NULL
 366                                 && entry->base.next->kind == ENTITY_ENUM_VALUE) {
 367                         fputs(",\n", out);
 368                 } else {
 369                         fputs(";\n", out);
 370                 }
 371         }
 372         fprintf(out, "\t\tpublic final int val;\n");
 373         fprintf(out, "\n");
 374         fprintf(out, "\t\tprivate static class C {\n");
 375         fprintf(out, "\t\t\tstatic int next_val;\n");
 376         fprintf(out, "\t\t}\n");
 377         fprintf(out, "\n");
 378         fprintf(out, "\t\t%s(int val) {\n", name);
 379         fprintf(out, "\t\t\tthis.val = val;\n");
 380         fprintf(out, "\t\t\tC.next_val = val + 1;\n");
 381         fprintf(out, "\t\t}\n");
 382         fprintf(out, "\n");
 383         fprintf(out, "\t\t%s() {\n", name);
 384         fprintf(out, "\t\t\tthis.val = C.next_val++;\n");
 385         fprintf(out, "\t\t}\n");
 386         fprintf(out, "\n");
 387         fprintf(out, "\t\tpublic static %s getEnum(int val) {\n", name);
 388         fprintf(out, "\t\t\tfor (%s entry : values()) {\n", name);
 389         fprintf(out, "\t\t\t\tif (val == entry.val)\n");
 390         fprintf(out, "\t\t\t\t\treturn entry;\n");
 391         fprintf(out, "\t\t\t}\n");
 392         fprintf(out, "\t\t\treturn null;\n");
 393         fprintf(out, "\t\t}\n");
 394         fprintf(out, "\t}\n");
 395         fprintf(out, "\n");
 396 }
 397
 398 #if 0
 399 static void write_variable(const entity_t *entity)
 400 {
 401         fprintf(out, "var %s : ", entity->base.symbol->string);
 402         write_type(entity->declaration.type);
 403         fprintf(out, "\n");
 404 }
 405 #endif
 406
 407 static void write_function(const entity_t *entity)
 408 {
 409         if (entity->function.statement != NULL) {
 410                 fprintf(stderr, "Warning: can't convert function bodies (at %s)\n",
 411                         entity->base.symbol->string);
 412                 return;
 413         }
 414
 415
 416         const function_type_t *function_type
 417                 = (const function_type_t*) entity->declaration.type;
 418
 419         fputc('\n', out);
 420         fprintf(out, "\tpublic static native ");
 421         type_t *return_type = skip_typeref(function_type->return_type);
 422         write_type(return_type);
 423         fprintf(out, " %s(", entity->base.symbol->string);
 424
 425         entity_t *parameter = entity->function.parameters.entities;
 426         int       first     = 1;
 427         int       n         = 0;
 428         for ( ; parameter != NULL; parameter = parameter->base.next) {
 429                 assert(parameter->kind == ENTITY_PARAMETER);
 430                 if(!first) {
 431                         fprintf(out, ", ");
 432                 } else {
 433                         first = 0;
 434                 }
 435                 write_type(parameter->declaration.type);
 436                 if(parameter->base.symbol != NULL) {
 437                         fprintf(out, " %s", fix_builtin_names(parameter->base.symbol->string));
 438                 } else {
 439                         fprintf(out, " _%d", n++);
 440                 }
 441         }
 442         if(function_type->variadic) {
 443                 if(!first) {
 444                         fprintf(out, ", ");
 445                 } else {
 446                         first = 0;
 447                 }
 448                 fputs("Object ... args", out);
 449         }
 450         fprintf(out, ");\n");
 451 }
 452
 453 void jna_limit_output(const char *filename)
 454 {
 455         output_limit *limit = xmalloc(sizeof(limit[0]));
 456         limit->filename = filename;
 457
 458         limit->next   = output_limits;
 459         output_limits = limit;
 460 }
 461
 462 void jna_set_libname(const char *new_libname)
 463 {
 464         libname = new_libname;
 465 }
 466
 467 void write_jna_decls(FILE *output, const translation_unit_t *unit)
 468 {
 469         out          = output;
 470         global_scope = &unit->scope;
 471
 472         pset_new_init(&avoid_symbols);
 473
 474         print_to_file(out);
 475         fprintf(out, "/* WARNING: Automatically generated file */\n");
 476         fputs("import com.sun.jna.Native;\n", out);
 477         fputs("import com.sun.jna.Pointer;\n", out);
 478         fputs("\n", out);
 479
 480         const char *register_libname = libname;
 481         if (register_libname == NULL)
 482                 register_libname = "library";
 483
 484         /* TODO: where to get the name from? */
 485         fputs("public class binding {\n", out);
 486         fputs("\tstatic {\n", out);
 487         fprintf(out, "\t\tNative.register(\"%s\");\n", register_libname);
 488         fputs("\t}\n", out);
 489         fputs("\n", out);
 490
 491         /* read the avoid list */
 492         FILE *avoid = fopen("avoid.config", "r");
 493         if (avoid != NULL) {
 494                 while (!feof(avoid)) {
 495                         char buf[1024];
 496                         char *res = fgets(buf, sizeof(buf), avoid);
 497                         if (res == NULL)
 498                                 break;
 499                         if (buf[0] == 0)
 500                                 continue;
 501
 502                         size_t len = strlen(buf);
 503                         if (buf[len-1] == '\n')
 504                                 buf[len-1] = 0;
 505
 506                         char *str = malloc(len+1);
 507                         memcpy(str, buf, len+1);
 508                         symbol_t *symbol = symbol_table_insert(str);
 509                         pset_new_insert(&avoid_symbols, symbol);
 510                 }
 511                 fclose(avoid);
 512         }
 513
 514         /* write structs,unions + enums */
 515         entity_t *entity = unit->scope.entities;
 516         for ( ; entity != NULL; entity = entity->base.next) {
 517                 if (entity->kind == ENTITY_ENUM) {
 518                         if (find_enum_typedef(&entity->enume) != NULL)
 519                                 continue;
 520                         write_enum(entity->base.symbol, &entity->enume);
 521                 } else if (entity->kind == ENTITY_TYPEDEF) {
 522                         type_t *type = entity->typedefe.type;
 523                         if (type->kind == TYPE_ENUM) {
 524                                 write_enum(entity->base.symbol, type->enumt.enume);
 525                         }
 526                 }
 527
 528 #if 0
 529                 if(type->kind == TYPE_COMPOUND_STRUCT
 530                                 || type->kind == TYPE_COMPOUND_UNION) {
 531                         write_compound(entity->base.symbol, &type->compound);
 532                 }
 533 #endif
 534         }
 535
 536         /* write functions */
 537         entity = unit->scope.entities;
 538         for ( ; entity != NULL; entity = entity->base.next) {
 539                 if (entity->kind != ENTITY_FUNCTION)
 540                         continue;
 541                 const char *input_name = entity->base.source_position.input_name;
 542                 if (is_system_header(input_name))
 543                         continue;
 544                 if (output_limits != NULL) {
 545                         bool in_limits = false;
 546                         for (output_limit *limit = output_limits; limit != NULL;
 547                              limit = limit->next) {
 548                             if (strcmp(limit->filename, input_name) == 0) {
 549                                         in_limits = true;
 550                                         break;
 551                                 }
 552                         }
 553                         if (!in_limits)
 554                                 continue;
 555                 }
 556
 557                 if (pset_new_contains(&avoid_symbols, entity->base.symbol))
 558                         continue;
 559                 write_function(entity);
 560         }
 561
 562         fputs("}\n", out);
 563
 564         pset_new_destroy(&avoid_symbols);
 565 }