source file of the GNU LilyPond music typesetter
- (c) 1999 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 1999--2002 Han-Wen Nienhuys <hanwen@cs.uu.nl>
*/
#ifndef SCM_HASH_HH
#define SCM_HASH_HH
+
#include "lily-guile.hh"
-#include "hash-table.hh"
#include "smobs.hh"
+
/**
- auto resizing hash table. This should come from GUILE.
+ auto resizing hash table.
+
+ 1. ALWAYS USE THIS AS VIA A POINTER, i.e.
+
+ class Foo {
+ Scheme_hash_table * tab;
+ };
+
+ and NOT
+
+ class Foo {
+ Scheme_hash_table tab;
+ }
+
+
+ 2. UPON DESTRUCTION, DO
+
+ scm_gc_unprotect_object (tab->self_scm_);
+
+
+
+
+ TODO:
+
+ - This should come from GUILE. We're typically doing double work,
+ because KEY already is a symbol, and is looked up in a symbol
+ hashtable.
+
+ - use GUILE hashtables iso STL.
*/
-class Scheme_hash_table : private Hash_table<SCM,SCM>
-{
+
+class Scheme_hash_table
+{
public:
- // bool elem_b (SCM k) const;
- Hash_table<SCM,SCM>::try_retrieve;
- Hash_table<SCM,SCM>::elem_b;
+ bool try_retrieve (SCM key, SCM *val);
+ bool elem_b (SCM key) const;
+
/**
WARNING: putting something in assumes responsibility for cleaning
up. */
void set (SCM k, SCM v);
- SCM get (SCM k);
-
+ SCM get (SCM k) const;
+ void remove (SCM k);
Scheme_hash_table ();
void operator = (Scheme_hash_table const &);
Scheme_hash_table (Scheme_hash_table const &);
- virtual ~Scheme_hash_table ();
- DECLARE_SMOBS;
+
SCM to_alist () const;
+private:
+ SCM hash_tab_;
+ unsigned elt_count_;
+
+ DECLARE_SMOBS (Scheme_hash_table,foo);
};
+
#endif /* SCM_HASH_HH */