nsz Git - cparser/blob - write_fluffy.c

   1 /*
   2  * This file is part of cparser.
   3  * Copyright (C) 2007-2008 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_fluffy.h"
  26 #include "symbol_t.h"
  27 #include "ast_t.h"
  28 #include "type_t.h"
  29 #include "type.h"
  30 #include "adt/error.h"
  31
  32 static const scope_t *global_scope;
  33 static FILE          *out;
  34
  35 static void write_type(const type_t *type);
  36
  37 static const char *get_atomic_type_string(const atomic_type_kind_t type)
  38 {
  39         switch(type) {
  40         case ATOMIC_TYPE_VOID:        return "void";
  41         case ATOMIC_TYPE_CHAR:        return "byte";
  42         case ATOMIC_TYPE_SCHAR:       return "byte";
  43         case ATOMIC_TYPE_UCHAR:       return "unsigned byte";
  44         case ATOMIC_TYPE_SHORT:       return "short";
  45         case ATOMIC_TYPE_USHORT:      return "unsigned short";
  46         case ATOMIC_TYPE_INT:         return "int";
  47         case ATOMIC_TYPE_UINT:        return "unsigned int";
  48         case ATOMIC_TYPE_LONG:        return "int";
  49         case ATOMIC_TYPE_ULONG:       return "unsigned int";
  50         case ATOMIC_TYPE_LONGLONG:    return "long";
  51         case ATOMIC_TYPE_ULONGLONG:   return "unsigned long";
  52         case ATOMIC_TYPE_FLOAT:       return "float";
  53         case ATOMIC_TYPE_DOUBLE:      return "double";
  54         case ATOMIC_TYPE_LONG_DOUBLE: return "double";
  55         case ATOMIC_TYPE_BOOL:        return "bool";
  56         default:                      panic("unsupported atomic type");
  57         }
  58 }
  59
  60 static void write_atomic_type(const atomic_type_t *type)
  61 {
  62         fprintf(out, "%s", get_atomic_type_string(type->akind));
  63 }
  64
  65 static void write_pointer_type(const pointer_type_t *type)
  66 {
  67         write_type(type->points_to);
  68         fputc('*', out);
  69 }
  70
  71 static declaration_t *find_typedef(const type_t *type)
  72 {
  73         /* first: search for a matching typedef in the global type... */
  74         declaration_t *declaration = global_scope->declarations;
  75         while(declaration != NULL) {
  76                 if(! (declaration->storage_class == STORAGE_CLASS_TYPEDEF)) {
  77                         declaration = declaration->next;
  78                         continue;
  79                 }
  80                 if(declaration->type == type)
  81                         break;
  82                 declaration = declaration->next;
  83         }
  84
  85         return declaration;
  86 }
  87
  88 static void write_compound_type(const compound_type_t *type)
  89 {
  90         declaration_t *declaration = find_typedef((const type_t*) type);
  91         if(declaration != NULL) {
  92                 fprintf(out, "%s", declaration->symbol->string);
  93                 return;
  94         }
  95
  96         /* does the struct have a name? */
  97         symbol_t *symbol = type->declaration->symbol;
  98         if(symbol != NULL) {
  99                 /* TODO: make sure we create a struct for it... */
 100                 fprintf(out, "%s", symbol->string);
 101                 return;
 102         }
 103         /* TODO: create a struct and use its name here... */
 104         fprintf(out, "/* TODO anonymous struct */byte");
 105 }
 106
 107 static void write_enum_type(const enum_type_t *type)
 108 {
 109         declaration_t *declaration = find_typedef((const type_t*) type);
 110         if(declaration != NULL) {
 111                 fprintf(out, "%s", declaration->symbol->string);
 112                 return;
 113         }
 114
 115         /* does the enum have a name? */
 116         symbol_t *symbol = type->declaration->symbol;
 117         if(symbol != NULL) {
 118                 /* TODO: make sure we create an enum for it... */
 119                 fprintf(out, "%s", symbol->string);
 120                 return;
 121         }
 122         /* TODO: create a struct and use its name here... */
 123         fprintf(out, "/* TODO anonymous enum */byte");
 124 }
 125
 126 static void write_function_type(const function_type_t *type)
 127 {
 128         fprintf(out, "(func(");
 129
 130         function_parameter_t *parameter = type->parameters;
 131         int                   first     = 1;
 132         while(parameter != NULL) {
 133                 if(!first) {
 134                         fprintf(out, ", ");
 135                 } else {
 136                         first = 0;
 137                 }
 138
 139 #if 0
 140                 if(parameter->symbol != NULL) {
 141                         fprintf(out, "%s : ", parameter->symbol->string);
 142                 } else {
 143                         /* TODO make up some unused names (or allow _ in fluffy?) */
 144                         fprintf(out, "_ : ");
 145                 }
 146 #endif
 147                 fputs("_ : ", out);
 148                 write_type(parameter->type);
 149
 150                 parameter = parameter->next;
 151         }
 152
 153         fprintf(out, ") : ");
 154         write_type(type->return_type);
 155         fprintf(out, ")");
 156 }
 157
 158 static void write_type(const type_t *type)
 159 {
 160         switch(type->kind) {
 161         case TYPE_ATOMIC:
 162                 write_atomic_type(&type->atomic);
 163                 return;
 164         case TYPE_POINTER:
 165                 write_pointer_type(&type->pointer);
 166                 return;
 167         case TYPE_COMPOUND_UNION:
 168         case TYPE_COMPOUND_STRUCT:
 169                 write_compound_type(&type->compound);
 170                 return;
 171         case TYPE_ENUM:
 172                 write_enum_type(&type->enumt);
 173                 return;
 174         case TYPE_FUNCTION:
 175                 write_function_type(&type->function);
 176                 return;
 177         case TYPE_INVALID:
 178                 panic("invalid type found");
 179                 break;
 180         default:
 181                 fprintf(out, "/* TODO type */");
 182                 break;
 183         }
 184 }
 185
 186 static void write_struct_entry(const declaration_t *declaration)
 187 {
 188         fprintf(out, "\t%s : ", declaration->symbol->string);
 189         write_type(declaration->type);
 190         fprintf(out, "\n");
 191 }
 192
 193 static void write_struct(const symbol_t *symbol, const compound_type_t *type)
 194 {
 195         fprintf(out, "struct %s:\n", symbol->string);
 196
 197         const declaration_t *declaration = type->declaration->scope.declarations;
 198         while(declaration != NULL) {
 199                 write_struct_entry(declaration);
 200                 declaration = declaration->next;
 201         }
 202
 203         fprintf(out, "\n");
 204 }
 205
 206 static void write_union(const symbol_t *symbol, const compound_type_t *type)
 207 {
 208         fprintf(out, "union %s:\n", symbol->string);
 209
 210         const declaration_t *declaration = type->declaration->scope.declarations;
 211         while(declaration != NULL) {
 212                 write_struct_entry(declaration);
 213                 declaration = declaration->next;
 214         }
 215
 216         fprintf(out, "\n");
 217 }
 218
 219 static void write_expression(const expression_t *expression);
 220
 221 static void write_unary_expression(const unary_expression_t *expression)
 222 {
 223         switch(expression->base.kind) {
 224         case EXPR_UNARY_NEGATE:
 225                 fputc('-', out);
 226                 break;
 227         case EXPR_UNARY_NOT:
 228                 fputc('!', out);
 229                 break;
 230         default:
 231                 panic("unimeplemented unary expression found");
 232         }
 233         write_expression(expression->value);
 234 }
 235
 236 static void write_expression(const expression_t *expression)
 237 {
 238         const const_expression_t *constant;
 239         /* TODO */
 240         switch(expression->kind) {
 241         case EXPR_CONST:
 242                 constant = &expression->conste;
 243                 if(is_type_integer(expression->base.type)) {
 244                         fprintf(out, "%lld", constant->v.int_value);
 245                 } else {
 246                         fprintf(out, "%Lf", constant->v.float_value);
 247                 }
 248                 break;
 249         EXPR_UNARY_CASES
 250                 write_unary_expression((const unary_expression_t*) expression);
 251                 break;
 252         default:
 253                 panic("not implemented expression");
 254         }
 255 }
 256
 257 static void write_enum(const symbol_t *symbol, const enum_type_t *type)
 258 {
 259         fprintf(out, "enum %s:\n", symbol->string);
 260
 261         declaration_t *entry = type->declaration->next;
 262         for ( ; entry != NULL && entry->storage_class == STORAGE_CLASS_ENUM_ENTRY;
 263                         entry = entry->next) {
 264                 fprintf(out, "\t%s", entry->symbol->string);
 265                 if(entry->init.initializer != NULL) {
 266                         fprintf(out, " <- ");
 267                         write_expression(entry->init.enum_value);
 268                 }
 269                 fputc('\n', out);
 270         }
 271         fprintf(out, "typealias %s <- int\n", symbol->string);
 272         fprintf(out, "\n");
 273 }
 274
 275 static void write_variable(const declaration_t *declaration)
 276 {
 277         fprintf(out, "var %s : ", declaration->symbol->string);
 278         write_type(declaration->type);
 279         /* TODO: initializers */
 280         fprintf(out, "\n");
 281 }
 282
 283 static void write_function(const declaration_t *declaration)
 284 {
 285         if(declaration->init.statement != NULL) {
 286                 fprintf(stderr, "Warning: can't convert function bodies (at %s)\n",
 287                         declaration->symbol->string);
 288         }
 289
 290         fprintf(out, "func extern %s(",
 291                 declaration->symbol->string);
 292
 293         const function_type_t *function_type
 294                 = (const function_type_t*) declaration->type;
 295
 296         declaration_t *parameter = declaration->scope.declarations;
 297         int            first     = 1;
 298         for( ; parameter != NULL; parameter = parameter->next) {
 299                 if(!first) {
 300                         fprintf(out, ", ");
 301                 } else {
 302                         first = 0;
 303                 }
 304                 if(parameter->symbol != NULL) {
 305                         fprintf(out, "%s : ", parameter->symbol->string);
 306                 } else {
 307                         fputs("_ : ", out);
 308                 }
 309                 write_type(parameter->type);
 310         }
 311         if(function_type->variadic) {
 312                 if(!first) {
 313                         fprintf(out, ", ");
 314                 } else {
 315                         first = 0;
 316                 }
 317                 fputs("...", out);
 318         }
 319         fprintf(out, ")");
 320
 321         const type_t *return_type = function_type->return_type;
 322         if(!is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
 323                 fprintf(out, " : ");
 324                 write_type(return_type);
 325         }
 326         fputc('\n', out);
 327 }
 328
 329 void write_fluffy_decls(FILE *output, const translation_unit_t *unit)
 330 {
 331         out            = output;
 332         global_scope = &unit->scope;
 333
 334         ast_set_output(out);
 335         fprintf(out, "/* WARNING: Automatically generated file */\n");
 336
 337         /* write structs,unions + enums */
 338         declaration_t *declaration = unit->scope.declarations;
 339         for( ; declaration != NULL; declaration = declaration->next) {
 340                 //fprintf(out, "// Decl: %s\n", declaration->symbol->string);
 341                 if(! (declaration->storage_class == STORAGE_CLASS_TYPEDEF)) {
 342                         continue;
 343                 }
 344                 type_t *type = declaration->type;
 345                 if(type->kind == TYPE_COMPOUND_STRUCT) {
 346                         write_struct(declaration->symbol, &type->compound);
 347                 } else if(type->kind == TYPE_COMPOUND_UNION) {
 348                         write_union(declaration->symbol, &type->compound);
 349                 } else if(type->kind == TYPE_ENUM) {
 350                         write_enum(declaration->symbol, &type->enumt);
 351                 }
 352         }
 353
 354         /* write global variables */
 355         declaration = unit->scope.declarations;
 356         for( ; declaration != NULL; declaration = declaration->next) {
 357                 if(declaration->namespc != NAMESPACE_NORMAL)
 358                         continue;
 359                 if(declaration->storage_class == STORAGE_CLASS_TYPEDEF
 360                                 || declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY)
 361                         continue;
 362
 363                 type_t *type = declaration->type;
 364                 if(type->kind == TYPE_FUNCTION)
 365                         continue;
 366
 367                 write_variable(declaration);
 368         }
 369
 370         /* write functions */
 371         declaration = unit->scope.declarations;
 372         for( ; declaration != NULL; declaration = declaration->next) {
 373                 if(declaration->namespc != NAMESPACE_NORMAL)
 374                         continue;
 375                 if(declaration->storage_class == STORAGE_CLASS_TYPEDEF
 376                                 || declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY)
 377                         continue;
 378
 379                 type_t *type = declaration->type;
 380                 if(type->kind != TYPE_FUNCTION)
 381                         continue;
 382
 383                 write_function(declaration);
 384         }
 385 }