nsz Git - cparser/blob - type.c

   1 #include <config.h>
   2
   3 #include <stdio.h>
   4 #include <assert.h>
   5 #include "type_t.h"
   6 #include "adt/error.h"
   7
   8 static struct obstack   _type_obst;
   9 struct obstack         *type_obst = &_type_obst;
  10 static FILE            *out;
  11
  12 static void intern_print_type_pre(const type_t *type);
  13 static void intern_print_type_post(const type_t *type);
  14
  15 void init_types(void)
  16 {
  17         obstack_init(type_obst);
  18 }
  19
  20 void exit_types(void)
  21 {
  22         obstack_free(type_obst, NULL);
  23 }
  24
  25 void type_set_output(FILE *stream)
  26 {
  27         out = stream;
  28 }
  29
  30 static
  31 void print_type_qualifiers(unsigned qualifiers)
  32 {
  33         if(qualifiers & TYPE_QUALIFIER_CONST) {
  34                 fputs("const ", out);
  35         }
  36         if(qualifiers & TYPE_QUALIFIER_VOLATILE) {
  37                 fputs("volatile ", out);
  38         }
  39         if(qualifiers & TYPE_QUALIFIER_RESTRICT) {
  40                 fputs("__restrict ", out);
  41         }
  42         if(qualifiers & TYPE_QUALIFIER_INLINE) {
  43                 fputs("inline ", out);
  44         }
  45 }
  46
  47 static
  48 void print_atomic_type(const atomic_type_t *type)
  49 {
  50         print_type_qualifiers(type->type.qualifiers);
  51
  52         switch(type->atype) {
  53         case ATOMIC_TYPE_INVALID:     fputs("INVALIDATOMIC", out); return;
  54         case ATOMIC_TYPE_VOID:        fputs("void", out); return;
  55         case ATOMIC_TYPE_BOOL:        fputs("bool", out); return;
  56         case ATOMIC_TYPE_CHAR:        fputs("char", out); return;
  57         case ATOMIC_TYPE_SCHAR:       fputs("signed char", out); return;
  58         case ATOMIC_TYPE_UCHAR:       fputs("unsigned char", out); return;
  59         case ATOMIC_TYPE_INT:         fputs("int", out); return;
  60         case ATOMIC_TYPE_UINT:        fputs("unsigned int", out); return;
  61         case ATOMIC_TYPE_SHORT:       fputs("short", out); return;
  62         case ATOMIC_TYPE_USHORT:      fputs("unsigned short", out); return;
  63         case ATOMIC_TYPE_LONG:        fputs("long", out); return;
  64         case ATOMIC_TYPE_ULONG:       fputs("unsigned long", out); return;
  65         case ATOMIC_TYPE_LONGLONG:    fputs("long long", out); return;
  66         case ATOMIC_TYPE_ULONGLONG:   fputs("unsigned long long", out); return;
  67         case ATOMIC_TYPE_LONG_DOUBLE: fputs("long double", out); return;
  68         case ATOMIC_TYPE_FLOAT:       fputs("float", out); return;
  69         case ATOMIC_TYPE_DOUBLE:      fputs("double", out); return;
  70         }
  71         fputs("UNKNOWNATOMIC", out);
  72 }
  73
  74 static
  75 void print_method_type_pre(const method_type_t *type)
  76 {
  77         print_type_qualifiers(type->type.qualifiers);
  78
  79         intern_print_type_pre(type->result_type);
  80
  81         /* TODO: don't emit braces if we're the toplevel type... */
  82         fputc('(', out);
  83 }
  84
  85 static
  86 void print_method_type_post(const method_type_t *type, const context_t *context)
  87 {
  88         /* TODO: don't emit braces if we're the toplevel type... */
  89         intern_print_type_post(type->result_type);
  90         fputc(')', out);
  91
  92         fputc('(', out);
  93
  94         int                 first     = 1;
  95         if(context == NULL) {
  96                 method_parameter_t *parameter = type->parameters;
  97                 for( ; parameter != NULL; parameter = parameter->next) {
  98                         if(first) {
  99                                 first = 0;
 100                         } else {
 101                                 fputs(", ", out);
 102                         }
 103                         print_type(parameter->type);
 104                 }
 105         } else {
 106                 declaration_t *parameter = context->declarations;
 107                 for( ; parameter != NULL; parameter = parameter->next) {
 108                         if(first) {
 109                                 first = 0;
 110                         } else {
 111                                 fputs(", ", out);
 112                         }
 113                         print_type_ext(parameter->type, parameter->symbol,
 114                                        &parameter->context);
 115                 }
 116         }
 117         if(type->variadic) {
 118                 if(first) {
 119                         first = 0;
 120                 } else {
 121                         fputs(", ", out);
 122                 }
 123                 fputs("...", out);
 124         }
 125         if(first && !type->unspecified_parameters) {
 126                 fputs("void", out);
 127         }
 128         fputc(')', out);
 129 }
 130
 131 static
 132 void print_pointer_type_pre(const pointer_type_t *type)
 133 {
 134         intern_print_type_pre(type->points_to);
 135         fputs("*", out);
 136         print_type_qualifiers(type->type.qualifiers);
 137 }
 138
 139 static void print_pointer_type_post(const pointer_type_t *type)
 140 {
 141         intern_print_type_post(type->points_to);
 142 }
 143
 144 static void print_type_enum(const enum_type_t *type)
 145 {
 146         print_type_qualifiers(type->type.qualifiers);
 147         if(type->symbol != NULL) {
 148                 fprintf(out, "enum %s", type->symbol->string);
 149         } else {
 150                 fprintf(out, "enum {\n");
 151
 152                 declaration_t *entry = type->entries_begin;
 153                 for( ; entry != type->entries_end->next; entry = entry->next) {
 154                         fprintf(out, "\t%s", entry->symbol->string);
 155                         if(entry->initializer != NULL) {
 156                                 fprintf(out, " = ");
 157                                 print_expression(entry->initializer);
 158                         }
 159                         fprintf(out, ",\n");
 160                 }
 161
 162                 fprintf(out, "} ");
 163         }
 164 }
 165
 166 static void intern_print_type_pre(const type_t *type)
 167 {
 168         switch(type->type) {
 169         case TYPE_INVALID:
 170                 fputs("invalid", out);
 171                 return;
 172         case TYPE_ENUM:
 173                 print_type_enum((const enum_type_t*) type);
 174                 return;
 175         case TYPE_ATOMIC:
 176                 print_atomic_type((const atomic_type_t*) type);
 177                 return;
 178         case TYPE_COMPOUND_STRUCT:
 179         case TYPE_COMPOUND_UNION:
 180                 print_type_qualifiers(type->qualifiers);
 181                 if(((const compound_type_t*) type)->symbol != NULL) {
 182                         fprintf(out, "%s", ((const compound_type_t*) type)->symbol->string);
 183                 }
 184                 return;
 185         case TYPE_BUILTIN:
 186                 fputs(((builtin_type_t*) type)->symbol->string, out);
 187                 return;
 188         case TYPE_METHOD:
 189                 print_method_type_pre((const method_type_t*) type);
 190                 return;
 191         case TYPE_POINTER:
 192                 print_pointer_type_pre((const pointer_type_t*) type);
 193                 return;
 194         }
 195         fputs("unknown", out);
 196 }
 197
 198 static
 199 void intern_print_type_post(const type_t *type)
 200 {
 201         switch(type->type) {
 202         case TYPE_METHOD:
 203                 print_method_type_post((const method_type_t*) type, NULL);
 204                 return;
 205         case TYPE_POINTER:
 206                 print_pointer_type_post((const pointer_type_t*) type);
 207                 return;
 208         case TYPE_INVALID:
 209         case TYPE_ATOMIC:
 210         case TYPE_ENUM:
 211         case TYPE_COMPOUND_STRUCT:
 212         case TYPE_COMPOUND_UNION:
 213         case TYPE_BUILTIN:
 214                 break;
 215         }
 216 }
 217
 218 void print_type(const type_t *type)
 219 {
 220         print_type_ext(type, NULL, NULL);
 221 }
 222
 223 void print_type_ext(const type_t *type, const symbol_t *symbol,
 224                     const context_t *context)
 225 {
 226         if(type == NULL) {
 227                 fputs("nil type", out);
 228                 return;
 229         }
 230
 231         intern_print_type_pre(type);
 232         if(symbol != NULL) {
 233                 fputc(' ', out);
 234                 fputs(symbol->string, out);
 235         }
 236         if(type->type == TYPE_METHOD) {
 237                 print_method_type_post((const method_type_t*) type, context);
 238         } else {
 239                 intern_print_type_post(type);
 240         }
 241 }
 242
 243 int type_valid(const type_t *type)
 244 {
 245         return type->type != TYPE_INVALID;
 246 }
 247
 248 int is_type_int(const type_t *type)
 249 {
 250         if(type->type != TYPE_ATOMIC)
 251                 return 0;
 252
 253         atomic_type_t *atomic_type = (atomic_type_t*) type;
 254         switch(atomic_type->atype) {
 255         case ATOMIC_TYPE_CHAR:
 256         case ATOMIC_TYPE_SCHAR:
 257         case ATOMIC_TYPE_UCHAR:
 258         case ATOMIC_TYPE_SHORT:
 259         case ATOMIC_TYPE_USHORT:
 260         case ATOMIC_TYPE_INT:
 261         case ATOMIC_TYPE_UINT:
 262         case ATOMIC_TYPE_LONG:
 263         case ATOMIC_TYPE_ULONG:
 264         case ATOMIC_TYPE_LONGLONG:
 265         case ATOMIC_TYPE_ULONGLONG:
 266                 return 1;
 267         default:
 268                 return 0;
 269         }
 270 }
 271
 272 static __attribute__((unused))
 273 void dbg_type(const type_t *type)
 274 {
 275         FILE *old_out = out;
 276         out = stderr;
 277         print_type(type);
 278         puts("\n");
 279         fflush(stderr);
 280         out = old_out;
 281 }