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_ERROR:
 228         case TYPE_INVALID:
 229         case TYPE_TYPEOF:
 230         case TYPE_TYPEDEF:
 231                 panic("invalid type found");
 232         case TYPE_ARRAY:
 233         case TYPE_BITFIELD:
 234         case TYPE_REFERENCE:
 235         case TYPE_FUNCTION:
 236         case TYPE_COMPLEX:
 237         case TYPE_IMAGINARY:
 238                 fprintf(out, "/* TODO type */Pointer");
 239                 break;
 240         }
 241 }
 242
 243 #if 0
 244 static void write_compound_entry(const entity_t *entity)
 245 {
 246         fprintf(out, "\t%s : ", entity->base.symbol->string);
 247         write_type(entity->declaration.type);
 248         fprintf(out, "\n");
 249 }
 250
 251 static void write_compound(const symbol_t *symbol, const compound_type_t *type)
 252 {
 253         fprintf(out, "%s %s:\n",
 254                 type->base.kind == TYPE_COMPOUND_STRUCT ? "struct" : "union",
 255                         symbol->string);
 256
 257         const entity_t *entity = type->compound->members.entities;
 258         for ( ; entity != NULL; entity = entity->base.next) {
 259                 write_compound_entry(entity);
 260         }
 261
 262         fprintf(out, "\n");
 263 }
 264 #endif
 265
 266 static void write_expression(const expression_t *expression);
 267
 268 static void write_unary_expression(const unary_expression_t *expression)
 269 {
 270         switch(expression->base.kind) {
 271         case EXPR_UNARY_NEGATE:
 272                 fputc('-', out);
 273                 break;
 274         case EXPR_UNARY_NOT:
 275                 fputc('!', out);
 276                 break;
 277         case EXPR_UNARY_CAST_IMPLICIT:
 278                 write_expression(expression->value);
 279                 return;
 280         default:
 281                 panic("unimeplemented unary expression found");
 282         }
 283         write_expression(expression->value);
 284 }
 285
 286 static void write_binary_expression(const binary_expression_t *expression)
 287 {
 288         fputs("(", out);
 289         write_expression(expression->left);
 290         fputc(' ', out);
 291         switch(expression->base.kind) {
 292         case EXPR_BINARY_BITWISE_OR:  fputs("|", out); break;
 293         case EXPR_BINARY_BITWISE_AND: fputs("&", out); break;
 294         case EXPR_BINARY_BITWISE_XOR: fputs("^", out); break;
 295         case EXPR_BINARY_SHIFTLEFT:   fputs("<<", out); break;
 296         case EXPR_BINARY_SHIFTRIGHT:  fputs(">>", out); break;
 297         case EXPR_BINARY_ADD:         fputs("+", out); break;
 298         case EXPR_BINARY_SUB:         fputs("-", out); break;
 299         case EXPR_BINARY_MUL:         fputs("*", out); break;
 300         case EXPR_BINARY_DIV:         fputs("/", out); break;
 301         default:
 302                 panic("unimplemented binexpr");
 303         }
 304         fputc(' ', out);
 305         write_expression(expression->right);
 306         fputs(")", out);
 307 }
 308
 309 static void write_expression(const expression_t *expression)
 310 {
 311         /* TODO */
 312         switch(expression->kind) {
 313         case EXPR_LITERAL_INTEGER:
 314         case EXPR_LITERAL_INTEGER_OCTAL:
 315                 fprintf(out, "%s", expression->literal.value.begin);
 316                 break;
 317         case EXPR_LITERAL_INTEGER_HEXADECIMAL:
 318                 fprintf(out, "0x%s", expression->literal.value.begin);
 319                 break;
 320         case EXPR_REFERENCE_ENUM_VALUE: {
 321                 /* UHOH... hacking */
 322                 entity_t *entity = expression->reference.entity;
 323                 write_enum_name(& entity->enum_value.enum_type->enumt);
 324                 fprintf(out, ".%s.val", entity->base.symbol->string);
 325                 break;
 326         }
 327         EXPR_UNARY_CASES
 328                 write_unary_expression(&expression->unary);
 329                 break;
 330         EXPR_BINARY_CASES
 331                 write_binary_expression(&expression->binary);
 332                 break;
 333         default:
 334                 panic("not implemented expression");
 335         }
 336 }
 337
 338 static void write_enum(const symbol_t *symbol, const enum_t *entity)
 339 {
 340         char buf[128];
 341         const char *name;
 342
 343         if (symbol == NULL) {
 344                 static int lastenum = 0;
 345                 snprintf(buf, sizeof(buf), "AnonEnum%d", lastenum++);
 346                 name = buf;
 347         } else {
 348                 name = symbol->string;
 349         }
 350
 351         fprintf(out, "\tpublic static enum %s {\n", name);
 352
 353         entity_t *entry = entity->base.next;
 354         for ( ; entry != NULL && entry->kind == ENTITY_ENUM_VALUE;
 355                         entry = entry->base.next) {
 356                 fprintf(out, "\t\t%s", entry->base.symbol->string);
 357                 fprintf(out, "(");
 358                 if(entry->enum_value.value != NULL) {
 359                         write_expression(entry->enum_value.value);
 360                 }
 361                 fprintf(out, ")");
 362                 if (entry->base.next != NULL
 363                                 && entry->base.next->kind == ENTITY_ENUM_VALUE) {
 364                         fputs(",\n", out);
 365                 } else {
 366                         fputs(";\n", out);
 367                 }
 368         }
 369         fprintf(out, "\t\tpublic final int val;\n");
 370         fprintf(out, "\n");
 371         fprintf(out, "\t\tprivate static class C {\n");
 372         fprintf(out, "\t\t\tstatic int next_val;\n");
 373         fprintf(out, "\t\t}\n");
 374         fprintf(out, "\n");
 375         fprintf(out, "\t\t%s(int val) {\n", name);
 376         fprintf(out, "\t\t\tthis.val = val;\n");
 377         fprintf(out, "\t\t\tC.next_val = val + 1;\n");
 378         fprintf(out, "\t\t}\n");
 379         fprintf(out, "\n");
 380         fprintf(out, "\t\t%s() {\n", name);
 381         fprintf(out, "\t\t\tthis.val = C.next_val++;\n");
 382         fprintf(out, "\t\t}\n");
 383         fprintf(out, "\n");
 384         fprintf(out, "\t\tpublic static %s getEnum(int val) {\n", name);
 385         fprintf(out, "\t\t\tfor (%s entry : values()) {\n", name);
 386         fprintf(out, "\t\t\t\tif (val == entry.val)\n");
 387         fprintf(out, "\t\t\t\t\treturn entry;\n");
 388         fprintf(out, "\t\t\t}\n");
 389         fprintf(out, "\t\t\treturn null;\n");
 390         fprintf(out, "\t\t}\n");
 391         fprintf(out, "\t}\n");
 392         fprintf(out, "\n");
 393 }
 394
 395 #if 0
 396 static void write_variable(const entity_t *entity)
 397 {
 398         fprintf(out, "var %s : ", entity->base.symbol->string);
 399         write_type(entity->declaration.type);
 400         fprintf(out, "\n");
 401 }
 402 #endif
 403
 404 static void write_function(const entity_t *entity)
 405 {
 406         if (entity->function.statement != NULL) {
 407                 fprintf(stderr, "Warning: can't convert function bodies (at %s)\n",
 408                         entity->base.symbol->string);
 409                 return;
 410         }
 411
 412
 413         const function_type_t *function_type
 414                 = (const function_type_t*) entity->declaration.type;
 415
 416         fputc('\n', out);
 417         fprintf(out, "\tpublic static native ");
 418         type_t *return_type = skip_typeref(function_type->return_type);
 419         write_type(return_type);
 420         fprintf(out, " %s(", entity->base.symbol->string);
 421
 422         entity_t *parameter = entity->function.parameters.entities;
 423         int       first     = 1;
 424         int       n         = 0;
 425         for ( ; parameter != NULL; parameter = parameter->base.next) {
 426                 assert(parameter->kind == ENTITY_PARAMETER);
 427                 if(!first) {
 428                         fprintf(out, ", ");
 429                 } else {
 430                         first = 0;
 431                 }
 432                 write_type(parameter->declaration.type);
 433                 if(parameter->base.symbol != NULL) {
 434                         fprintf(out, " %s", fix_builtin_names(parameter->base.symbol->string));
 435                 } else {
 436                         fprintf(out, " _%d", n++);
 437                 }
 438         }
 439         if(function_type->variadic) {
 440                 if(!first) {
 441                         fprintf(out, ", ");
 442                 } else {
 443                         first = 0;
 444                 }
 445                 fputs("Object ... args", out);
 446         }
 447         fprintf(out, ");\n");
 448 }
 449
 450 void jna_limit_output(const char *filename)
 451 {
 452         output_limit *limit = xmalloc(sizeof(limit[0]));
 453         limit->filename = filename;
 454
 455         limit->next   = output_limits;
 456         output_limits = limit;
 457 }
 458
 459 void jna_set_libname(const char *new_libname)
 460 {
 461         libname = new_libname;
 462 }
 463
 464 void write_jna_decls(FILE *output, const translation_unit_t *unit)
 465 {
 466         out          = output;
 467         global_scope = &unit->scope;
 468
 469         pset_new_init(&avoid_symbols);
 470
 471         print_to_file(out);
 472         fprintf(out, "/* WARNING: Automatically generated file */\n");
 473         fputs("import com.sun.jna.Native;\n", out);
 474         fputs("import com.sun.jna.Pointer;\n", out);
 475         fputs("\n", out);
 476
 477         const char *register_libname = libname;
 478         if (register_libname == NULL)
 479                 register_libname = "library";
 480
 481         /* TODO: where to get the name from? */
 482         fputs("public class binding {\n", out);
 483         fputs("\tstatic {\n", out);
 484         fprintf(out, "\t\tNative.register(\"%s\");\n", register_libname);
 485         fputs("\t}\n", out);
 486         fputs("\n", out);
 487
 488         /* read the avoid list */
 489         FILE *avoid = fopen("avoid.config", "r");
 490         if (avoid != NULL) {
 491                 while (!feof(avoid)) {
 492                         char buf[1024];
 493                         char *res = fgets(buf, sizeof(buf), avoid);
 494                         if (res == NULL)
 495                                 break;
 496                         if (buf[0] == 0)
 497                                 continue;
 498
 499                         size_t len = strlen(buf);
 500                         if (buf[len-1] == '\n')
 501                                 buf[len-1] = 0;
 502
 503                         char *str = malloc(len+1);
 504                         memcpy(str, buf, len+1);
 505                         symbol_t *symbol = symbol_table_insert(str);
 506                         pset_new_insert(&avoid_symbols, symbol);
 507                 }
 508                 fclose(avoid);
 509         }
 510
 511         /* write structs,unions + enums */
 512         entity_t *entity = unit->scope.entities;
 513         for ( ; entity != NULL; entity = entity->base.next) {
 514                 if (entity->kind == ENTITY_ENUM) {
 515                         if (find_enum_typedef(&entity->enume) != NULL)
 516                                 continue;
 517                         write_enum(entity->base.symbol, &entity->enume);
 518                 } else if (entity->kind == ENTITY_TYPEDEF) {
 519                         type_t *type = entity->typedefe.type;
 520                         if (type->kind == TYPE_ENUM) {
 521                                 write_enum(entity->base.symbol, type->enumt.enume);
 522                         }
 523                 }
 524
 525 #if 0
 526                 if(type->kind == TYPE_COMPOUND_STRUCT
 527                                 || type->kind == TYPE_COMPOUND_UNION) {
 528                         write_compound(entity->base.symbol, &type->compound);
 529                 }
 530 #endif
 531         }
 532
 533         /* write functions */
 534         entity = unit->scope.entities;
 535         for ( ; entity != NULL; entity = entity->base.next) {
 536                 if (entity->kind != ENTITY_FUNCTION)
 537                         continue;
 538                 const char *input_name = entity->base.source_position.input_name;
 539                 if (is_system_header(input_name))
 540                         continue;
 541                 if (entity->function.elf_visibility != ELF_VISIBILITY_DEFAULT)
 542                         continue;
 543                 if (output_limits != NULL) {
 544                         bool in_limits = false;
 545                         for (output_limit *limit = output_limits; limit != NULL;
 546                              limit = limit->next) {
 547                             if (strcmp(limit->filename, input_name) == 0) {
 548                                         in_limits = true;
 549                                         break;
 550                                 }
 551                         }
 552                         if (!in_limits)
 553                                 continue;
 554                 }
 555
 556                 if (pset_new_contains(&avoid_symbols, entity->base.symbol))
 557                         continue;
 558                 write_function(entity);
 559         }
 560
 561         fputs("}\n", out);
 562
 563         pset_new_destroy(&avoid_symbols);
 564 }