nsz Git - cparser/blob - write_fluffy.c

   1 #include <config.h>
   2
   3 #include <errno.h>
   4 #include <string.h>
   5
   6 #include "ast_t.h"
   7 #include "type_t.h"
   8 #include "type.h"
   9 #include "adt/error.h"
  10
  11 static const context_t *global_context;
  12 static FILE            *out;
  13
  14 static void write_type(const type_t *type);
  15
  16 static const char *get_atomic_type_string(const atomic_type_type_t type)
  17 {
  18         switch(type) {
  19         case ATOMIC_TYPE_VOID:       return "void";
  20         case ATOMIC_TYPE_CHAR:       return "byte";
  21         case ATOMIC_TYPE_SCHAR:      return "byte";
  22         case ATOMIC_TYPE_UCHAR:      return "unsigned byte";
  23         case ATOMIC_TYPE_SHORT:      return "short";
  24         case ATOMIC_TYPE_USHORT:     return "unsigned short";
  25         case ATOMIC_TYPE_INT:        return "int";
  26         case ATOMIC_TYPE_UINT:       return "unsigned int";
  27         case ATOMIC_TYPE_LONG:       return "int";
  28         case ATOMIC_TYPE_ULONG:      return "unsigned int";
  29         case ATOMIC_TYPE_LONGLONG:   return "long";
  30         case ATOMIC_TYPE_ULONGLONG:  return "unsigned long";
  31         case ATOMIC_TYPE_FLOAT:      return "float";
  32         case ATOMIC_TYPE_DOUBLE:     return "double";
  33         case ATOMIC_TYPE_LONG_DOUBLE: return "double";
  34         case ATOMIC_TYPE_BOOL:       return "bool";
  35         default:                     panic("unsupported atomic type");
  36         }
  37 }
  38
  39 static void write_atomic_type(const atomic_type_t *type)
  40 {
  41         fprintf(out, "%s", get_atomic_type_string(type->atype));
  42 }
  43
  44 static void write_pointer_type(const pointer_type_t *type)
  45 {
  46         write_type(type->points_to);
  47         fputc('*', out);
  48 }
  49
  50 static declaration_t *find_typedef(const type_t *type)
  51 {
  52         /* first: search for a matching typedef in the global type... */
  53         declaration_t *declaration = global_context->declarations;
  54         while(declaration != NULL) {
  55                 if(! (declaration->storage_class == STORAGE_CLASS_TYPEDEF)) {
  56                         declaration = declaration->next;
  57                         continue;
  58                 }
  59                 if(declaration->type == type)
  60                         break;
  61                 declaration = declaration->next;
  62         }
  63
  64         return declaration;
  65 }
  66
  67 static void write_compound_type(const compound_type_t *type)
  68 {
  69         declaration_t *declaration = find_typedef((const type_t*) type);
  70         if(declaration != NULL) {
  71                 fprintf(out, "%s", declaration->symbol->string);
  72                 return;
  73         }
  74
  75         /* does the struct have a name? */
  76         if(type->symbol != NULL) {
  77                 /* TODO: make sure we create a struct for it... */
  78                 fprintf(out, "%s", type->symbol->string);
  79                 return;
  80         }
  81         /* TODO: create a struct and use its name here... */
  82         fprintf(out, "/* TODO anonymous struct */byte");
  83 }
  84
  85 static void write_enum_type(const enum_type_t *type)
  86 {
  87         declaration_t *declaration = find_typedef((const type_t*) type);
  88         if(declaration != NULL) {
  89                 fprintf(out, "%s", declaration->symbol->string);
  90                 return;
  91         }
  92
  93         /* does the enum have a name? */
  94         if(type->symbol != NULL) {
  95                 /* TODO: make sure we create an enum for it... */
  96                 fprintf(out, "%s", type->symbol->string);
  97                 return;
  98         }
  99         /* TODO: create a struct and use its name here... */
 100         fprintf(out, "/* TODO anonymous enum */byte");
 101 }
 102
 103 static void write_method_type(const method_type_t *type)
 104 {
 105         fprintf(out, "(func(");
 106
 107         method_parameter_t *parameter = type->parameters;
 108         int                 first     = 1;
 109         while(parameter != NULL) {
 110                 if(!first) {
 111                         fprintf(out, ", ");
 112                 } else {
 113                         first = 0;
 114                 }
 115
 116 #if 0
 117                 if(parameter->symbol != NULL) {
 118                         fprintf(out, "%s : ", parameter->symbol->string);
 119                 } else {
 120                         /* TODO make up some unused names (or allow _ in fluffy?) */
 121                         fprintf(out, "_ : ");
 122                 }
 123 #endif
 124                 fputs("_ : ", out);
 125                 write_type(parameter->type);
 126
 127                 parameter = parameter->next;
 128         }
 129
 130         fprintf(out, ") : ");
 131         write_type(type->result_type);
 132         fprintf(out, ")");
 133 }
 134
 135 static void write_type(const type_t *type)
 136 {
 137         switch(type->type) {
 138         case TYPE_ATOMIC:
 139                 write_atomic_type((const atomic_type_t*) type);
 140                 return;
 141         case TYPE_POINTER:
 142                 write_pointer_type((const pointer_type_t*) type);
 143                 return;
 144         case TYPE_COMPOUND_UNION:
 145         case TYPE_COMPOUND_STRUCT:
 146                 write_compound_type((const compound_type_t*) type);
 147                 return;
 148         case TYPE_ENUM:
 149                 write_enum_type((const enum_type_t*) type);
 150                 return;
 151         case TYPE_METHOD:
 152                 write_method_type((const method_type_t*) type);
 153                 return;
 154         case TYPE_INVALID:
 155                 panic("invalid type found");
 156                 break;
 157         default:
 158                 fprintf(out, "/* TODO type */");
 159                 break;
 160         }
 161 }
 162
 163 static void write_struct_entry(const declaration_t *declaration)
 164 {
 165         fprintf(out, "\t%s : ", declaration->symbol->string);
 166         write_type(declaration->type);
 167         fprintf(out, "\n");
 168 }
 169
 170 static void write_struct(const symbol_t *symbol, const compound_type_t *type)
 171 {
 172         fprintf(out, "struct %s:\n", symbol->string);
 173
 174         const declaration_t *declaration = type->context.declarations;
 175         while(declaration != NULL) {
 176                 write_struct_entry(declaration);
 177                 declaration = declaration->next;
 178         }
 179
 180         fprintf(out, "\n");
 181 }
 182
 183 static void write_union(const symbol_t *symbol, const compound_type_t *type)
 184 {
 185         fprintf(out, "union %s:\n", symbol->string);
 186
 187         const declaration_t *declaration = type->context.declarations;
 188         while(declaration != NULL) {
 189                 write_struct_entry(declaration);
 190                 declaration = declaration->next;
 191         }
 192
 193         fprintf(out, "\n");
 194 }
 195
 196 static void write_expression(const expression_t *expression);
 197
 198 static void write_unary_expression(const unary_expression_t *expression)
 199 {
 200         switch(expression->type) {
 201         case UNEXPR_NEGATE:
 202                 fputc('-', out);
 203                 break;
 204         case UNEXPR_NOT:
 205                 fputc('!', out);
 206                 break;
 207         default:
 208                 panic("unimeplemented unary expression found");
 209         }
 210         write_expression(expression->value);
 211 }
 212
 213 static void write_expression(const expression_t *expression)
 214 {
 215         const const_t *constant;
 216         /* TODO */
 217         switch(expression->type) {
 218         case EXPR_CONST:
 219                 constant = (const const_t*) expression;
 220                 if(is_type_integer(expression->datatype)) {
 221                         fprintf(out, "%d", constant->v.int_value);
 222                 } else {
 223                         fprintf(out, "%Lf", constant->v.float_value);
 224                 }
 225                 break;
 226         case EXPR_UNARY:
 227                 write_unary_expression((const unary_expression_t*) expression);
 228                 break;
 229         default:
 230                 panic("not implemented expression");
 231         }
 232 }
 233
 234 static void write_enum(const symbol_t *symbol, const enum_type_t *type)
 235 {
 236         fprintf(out, "enum %s:\n", symbol->string);
 237
 238         declaration_t *entry = type->entries_begin;
 239         for ( ; entry != type->entries_end->next; entry = entry->next) {
 240                 fprintf(out, "\t%s", entry->symbol->string);
 241                 if(entry->initializer != NULL) {
 242                         fprintf(out, " <- ");
 243                         write_expression(entry->initializer);
 244                 }
 245                 fputc('\n', out);
 246         }
 247         fprintf(out, "typealias %s <- int\n", symbol->string);
 248         fprintf(out, "\n");
 249 }
 250
 251 static void write_variable(const declaration_t *declaration)
 252 {
 253         fprintf(out, "var %s : ", declaration->symbol->string);
 254         write_type(declaration->type);
 255         /* TODO: initializers */
 256         fprintf(out, "\n");
 257 }
 258
 259 static void write_function(const declaration_t *declaration)
 260 {
 261         if(declaration->statement != NULL) {
 262                 fprintf(stderr, "Warning: can't convert function bodies (at %s)\n",
 263                         declaration->symbol->string);
 264         }
 265
 266         fprintf(out, "func extern %s(",
 267                 declaration->symbol->string);
 268
 269         const method_type_t *method_type = (const method_type_t*) declaration->type;
 270
 271         declaration_t *parameter = declaration->context.declarations;
 272         int            first     = 1;
 273         for( ; parameter != NULL; parameter = parameter->next) {
 274                 if(!first) {
 275                         fprintf(out, ", ");
 276                 } else {
 277                         first = 0;
 278                 }
 279                 if(parameter->symbol != NULL) {
 280                         fprintf(out, "%s : ", parameter->symbol->string);
 281                 } else {
 282                         fputs("_ : ", out);
 283                 }
 284                 write_type(parameter->type);
 285         }
 286         if(method_type->variadic) {
 287                 if(!first) {
 288                         fprintf(out, ", ");
 289                 } else {
 290                         first = 0;
 291                 }
 292                 fputs("...", out);
 293         }
 294         fprintf(out, ")");
 295
 296         const type_t        *result_type = method_type->result_type;
 297         if(result_type->type != TYPE_ATOMIC ||
 298                         ((const atomic_type_t*) result_type)->atype != ATOMIC_TYPE_VOID) {
 299                 fprintf(out, " : ");
 300                 write_type(result_type);
 301         }
 302         fputc('\n', out);
 303 }
 304
 305 void write_fluffy_decls(const translation_unit_t *unit)
 306 {
 307 #if 0
 308         out = fopen("out.fluffy", "w");
 309         if(out == NULL) {
 310                 fprintf(stderr, "Couldn't open out.fluffy: %s\n", strerror(errno));
 311                 exit(1);
 312         }
 313 #endif
 314         out            = stdout;
 315         global_context = &unit->context;
 316
 317         fprintf(out, "/* WARNING: Automatically generated file */\n");
 318
 319         /* write structs,unions + enums */
 320         declaration_t *declaration = unit->context.declarations;
 321         for( ; declaration != NULL; declaration = declaration->next) {
 322                 //fprintf(out, "// Decl: %s\n", declaration->symbol->string);
 323                 if(! (declaration->storage_class == STORAGE_CLASS_TYPEDEF)) {
 324                         continue;
 325                 }
 326                 type_t *type = declaration->type;
 327                 if(type->type == TYPE_COMPOUND_STRUCT) {
 328                         write_struct(declaration->symbol, (compound_type_t*) type);
 329                 } else if(type->type == TYPE_COMPOUND_UNION) {
 330                         write_union(declaration->symbol, (compound_type_t*) type);
 331                 } else if(type->type == TYPE_ENUM) {
 332                         write_enum(declaration->symbol, (enum_type_t*) type);
 333                 }
 334         }
 335
 336         /* write global variables */
 337         declaration = unit->context.declarations;
 338         for( ; declaration != NULL; declaration = declaration->next) {
 339                 if(declaration->storage_class == STORAGE_CLASS_TYPEDEF
 340                                 || declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY)
 341                         continue;
 342
 343                 type_t *type = declaration->type;
 344                 if(type->type == TYPE_METHOD)
 345                         continue;
 346
 347                 write_variable(declaration);
 348         }
 349
 350         /* write functions */
 351         declaration = unit->context.declarations;
 352         for( ; declaration != NULL; declaration = declaration->next) {
 353                 if(declaration->storage_class == STORAGE_CLASS_TYPEDEF
 354                                 || declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY)
 355                         continue;
 356
 357                 type_t *type = declaration->type;
 358                 if(type->type != TYPE_METHOD)
 359                         continue;
 360
 361                 write_function(declaration);
 362         }
 363
 364         //fclose(out);
 365 }