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