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 "adt/error.h"
   9
  10 static const context_t *global_context;
  11 static FILE            *out;
  12
  13 static void write_type(const type_t *type);
  14
  15 static const char *get_atomic_type_string(const atomic_type_type_t type)
  16 {
  17         switch(type) {
  18         case ATOMIC_TYPE_VOID:       return "void";
  19         case ATOMIC_TYPE_CHAR:       return "byte";
  20         case ATOMIC_TYPE_SCHAR:      return "byte";
  21         case ATOMIC_TYPE_UCHAR:      return "unsigned byte";
  22         case ATOMIC_TYPE_SHORT:      return "short";
  23         case ATOMIC_TYPE_USHORT:     return "unsigned short";
  24         case ATOMIC_TYPE_INT:        return "int";
  25         case ATOMIC_TYPE_UINT:       return "unsigned int";
  26         case ATOMIC_TYPE_LONG:       return "int";
  27         case ATOMIC_TYPE_ULONG:      return "unsigned int";
  28         case ATOMIC_TYPE_LONGLONG:   return "long";
  29         case ATOMIC_TYPE_ULONGLONG:  return "unsigned long";
  30         case ATOMIC_TYPE_FLOAT:      return "float";
  31         case ATOMIC_TYPE_DOUBLE:     return "double";
  32         case ATOMIC_TYPE_LONG_DOUBLE: return "double";
  33         case ATOMIC_TYPE_BOOL:       return "bool";
  34         default:                     panic("unsupported atomic type");
  35         }
  36 }
  37
  38 static void write_atomic_type(const atomic_type_t *type)
  39 {
  40         fprintf(out, "%s", get_atomic_type_string(type->atype));
  41 }
  42
  43 static void write_pointer_type(const pointer_type_t *type)
  44 {
  45         write_type(type->points_to);
  46         fputc('*', out);
  47 }
  48
  49 static void write_compound_type(const compound_type_t *type)
  50 {
  51         /* first: search for a matching typedef in the global type... */
  52         declaration_t *declaration = global_context->declarations;
  53         while(declaration != NULL) {
  54                 if(! (declaration->storage_class & STORAGE_CLASS_TYPEDEF)) {
  55                         declaration = declaration->next;
  56                         continue;
  57                 }
  58                 if(declaration->type == (type_t*) type)
  59                         break;
  60                 declaration = declaration->next;
  61         }
  62
  63         if(declaration != NULL) {
  64                 fprintf(out, "%s", declaration->symbol->string);
  65                 return;
  66         }
  67
  68         /* does the struct have a name? */
  69         if(type->symbol != NULL) {
  70                 /* TODO: make sure we create a struct for it... */
  71                 fprintf(out, "%s", type->symbol->string);
  72                 return;
  73         }
  74         /* TODO: create a struct and use its name here... */
  75         fprintf(out, "/* TODO anonymous struct */byte");
  76 }
  77
  78 static void write_method_type(const method_type_t *type)
  79 {
  80         fprintf(out, "(func(");
  81
  82         method_parameter_type_t *parameter_type = type->parameter_types;
  83         int                      first          = 1;
  84         while(parameter_type != NULL) {
  85                 if(!first) {
  86                         fprintf(out, ", ");
  87                 } else {
  88                         first = 0;
  89                 }
  90
  91                 if(parameter_type->symbol != NULL) {
  92                         fprintf(out, "%s : ", parameter_type->symbol->string);
  93                 } else {
  94                         /* TODO make up some unused names (or allow _ in fluffy?) */
  95                         fprintf(out, "_ : ");
  96                 }
  97                 write_type(parameter_type->type);
  98
  99                 parameter_type = parameter_type->next;
 100         }
 101
 102         fprintf(out, ") : ");
 103         write_type(type->result_type);
 104         fprintf(out, ")");
 105 }
 106
 107 static void write_type(const type_t *type)
 108 {
 109         switch(type->type) {
 110         case TYPE_ATOMIC:
 111                 write_atomic_type((const atomic_type_t*) type);
 112                 return;
 113         case TYPE_POINTER:
 114                 write_pointer_type((const pointer_type_t*) type);
 115                 return;
 116         case TYPE_COMPOUND_UNION:
 117         case TYPE_COMPOUND_STRUCT:
 118                 write_compound_type((const compound_type_t*) type);
 119                 return;
 120         case TYPE_METHOD:
 121                 write_method_type((const method_type_t*) type);
 122                 return;
 123         case TYPE_INVALID:
 124                 panic("invalid type found");
 125                 break;
 126         default:
 127                 fprintf(out, "/* TODO type */");
 128                 break;
 129         }
 130 }
 131
 132 static void write_struct_entry(const declaration_t *declaration)
 133 {
 134         fprintf(out, "\t%s : ", declaration->symbol->string);
 135         write_type(declaration->type);
 136         fprintf(out, "\n");
 137 }
 138
 139 static void write_struct(const symbol_t *symbol, const compound_type_t *type)
 140 {
 141         (void) type;
 142         fprintf(out, "struct %s:\n", symbol->string);
 143
 144         const declaration_t *declaration = type->context.declarations;
 145         while(declaration != NULL) {
 146                 write_struct_entry(declaration);
 147                 declaration = declaration->next;
 148         }
 149
 150         fprintf(out, "\n");
 151 }
 152
 153 static void write_variable(const declaration_t *declaration)
 154 {
 155         fprintf(out, "var %s : ", declaration->symbol->string);
 156         write_type(declaration->type);
 157         /* TODO: initializers */
 158         fprintf(out, "\n");
 159 }
 160
 161 static void write_function(const declaration_t *declaration)
 162 {
 163         if(declaration->statement != NULL) {
 164                 fprintf(stderr, "Warning: can't convert function bodies (at %s)\n",
 165                         declaration->symbol->string);
 166         }
 167
 168         fprintf(out, "func extern %s(",
 169                 declaration->symbol->string);
 170
 171         declaration_t *parameter = declaration->context.declarations;
 172         int            first     = 1;
 173         for( ; parameter != NULL; parameter = parameter->next) {
 174                 if(!first) {
 175                         fprintf(out, ", ");
 176                 } else {
 177                         first = 0;
 178                 }
 179                 if(parameter->symbol != NULL) {
 180                         fprintf(out, "%s : ", parameter->symbol->string);
 181                 } else {
 182                         fputs("_ : ", out);
 183                 }
 184                 write_type(parameter->type);
 185         }
 186         fprintf(out, ")");
 187
 188         const method_type_t *method_type = (const method_type_t*) declaration->type;
 189         const type_t        *result_type = method_type->result_type;
 190         if(result_type->type != TYPE_ATOMIC ||
 191                         ((const atomic_type_t*) result_type)->atype != ATOMIC_TYPE_VOID) {
 192                 fprintf(out, " : ");
 193                 write_type(result_type);
 194         }
 195         fputc('\n', out);
 196 }
 197
 198 void write_fluffy_decls(const translation_unit_t *unit)
 199 {
 200 #if 0
 201         out = fopen("out.fluffy", "w");
 202         if(out == NULL) {
 203                 fprintf(stderr, "Couldn't open out.fluffy: %s\n", strerror(errno));
 204                 exit(1);
 205         }
 206 #endif
 207         out            = stdout;
 208         global_context = &unit->context;
 209
 210         fprintf(out, "/* WARNING: Automatically generated file */\n");
 211
 212         /* write structs + enums */
 213         declaration_t *declaration = unit->context.declarations;
 214         while(declaration != NULL) {
 215                 //fprintf(out, "// Decl: %s\n", declaration->symbol->string);
 216                 if(! (declaration->storage_class & STORAGE_CLASS_TYPEDEF)) {
 217                         declaration = declaration->next;
 218                         continue;
 219                 }
 220                 type_t *type = declaration->type;
 221                 if(type->type == TYPE_COMPOUND_STRUCT) {
 222                         write_struct(declaration->symbol, (compound_type_t*) type);
 223                 } else if(type->type == TYPE_COMPOUND_UNION) {
 224                         /* TODO */
 225                 }
 226
 227                 declaration = declaration->next;
 228         }
 229
 230         /* write global variables */
 231         declaration = unit->context.declarations;
 232         for( ; declaration != NULL; declaration = declaration->next) {
 233                 if(declaration->storage_class & STORAGE_CLASS_TYPEDEF)
 234                         continue;
 235
 236                 type_t *type = declaration->type;
 237                 if(type->type == TYPE_METHOD)
 238                         continue;
 239
 240                 write_variable(declaration);
 241         }
 242
 243         /* write functions */
 244         declaration = unit->context.declarations;
 245         for( ; declaration != NULL; declaration = declaration->next) {
 246                 if(declaration->storage_class & STORAGE_CLASS_TYPEDEF)
 247                         continue;
 248
 249                 type_t *type = declaration->type;
 250                 if(type->type != TYPE_METHOD)
 251                         continue;
 252
 253                 write_function(declaration);
 254         }
 255
 256         //fclose(out);
 257 }