mdw@git.distorted.org.uk Git - cparse/blob - scope.c

   1 #include "cparse.h"
   2
   3 static struct scope *scope;
   4
   5 void enter_scope(void) {
   6   struct scope *new_scope;
   7
   8   NEW(new_scope);
   9   new_scope->parent = scope;
  10   scope = new_scope;
  11 }
  12
  13 void exit_scope(void) {
  14   scope = scope->parent;
  15 }
  16
  17 /* might be called before the declaration_specifiers have been filled in */
  18 void add_declaration(struct declarator *d) {
  19   /* skip nameless declarators to simplify some callers */
  20   if(d->name) {
  21     if(!scope->declarations)
  22       scope->declarations = dict_new();
  23     dict_add(scope->declarations, d->name, d);
  24   }
  25   /* XXX redeclaration */
  26 }
  27
  28 struct declarator *lookup(const char *name) {
  29   const struct scope *s;
  30   struct declarator *d;
  31
  32   for(s = scope; s; s = s->parent)
  33     if(s->declarations && (d = dict_get(s->declarations, name)))
  34       return d;
  35   return 0;
  36 }
  37
  38 void scope_init(void) {
  39   scope = 0;
  40   enter_scope();
  41 }
  42
  43 /*
  44 Local Variables:
  45 c-basic-offset:2
  46 comment-column:40
  47 fill-column:79
  48 End:
  49 */