source file of the GNU LilyPond music typesetter
- (c) 1999--2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 1999--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
*/
#include <stdio.h>
#include "scm-hash.hh"
#include "ly-smobs.icc"
+/*
+ Return: number of objects.
+ */
+int
+copy_scm_hashes (SCM dest, SCM src)
+{
+ int k = 0;
+ for (int i = SCM_VECTOR_LENGTH (src); i--;)
+ for (SCM s = scm_vector_ref (src, SCM_MAKINUM (i)); ly_pair_p(s); s = ly_cdr (s))
+ {
+ scm_hashq_set_x (dest, ly_caar (s), ly_cdar (s));
+ k++;
+ }
+ return k ;
+}
Scheme_hash_table::Scheme_hash_table ()
{
+ hash_tab_ = SCM_EOL;
smobify_self ();
+ hash_tab_ = scm_make_vector (gh_int2scm (119), SCM_EOL);
+ elt_count_ = 0;
}
Scheme_hash_table::Scheme_hash_table (Scheme_hash_table const &src)
- : Scm_stl_map (src)
+
{
+ hash_tab_ = SCM_EOL;
+ elt_count_ = 0;
smobify_self ();
+
+ hash_tab_ = scm_make_vector (gh_int2scm (src.elt_count_ >? 11 ), SCM_EOL);
+ elt_count_ = copy_scm_hashes (hash_tab_, src.hash_tab_);
}
void
-Scheme_hash_table::operator =(Scheme_hash_table const & src)
+Scheme_hash_table::operator = (Scheme_hash_table const & src)
{
- Scm_stl_map::operator = (src);
-
- // we do not copy the self_scm () field!
+ if (&src == this)
+ return;
+
+ hash_tab_ = scm_make_vector (gh_int2scm (src.elt_count_ >? 11), SCM_EOL);
+ elt_count_ = copy_scm_hashes (hash_tab_, src.hash_tab_);
}
-
-
-
SCM
Scheme_hash_table::mark_smob (SCM s)
{
- /*
- can't typecheck naively, since GC bit lives in CAR of S
- */
-
- Scheme_hash_table *me = (Scheme_hash_table*) SCM_CELL_WORD_1(s);
-
- for (Scm_stl_map::const_iterator i= me->begin (); i != me->end(); i++)
- {
- scm_gc_mark ((*i).first);
- scm_gc_mark ((*i).second);
- }
+ Scheme_hash_table *me = (Scheme_hash_table*) SCM_CELL_WORD_1 (s);
+ scm_gc_mark (me->hash_tab_);
return SCM_EOL;
}
{
assert (unsmob (s));
char str[1000];
- sprintf (str, "#<Scheme_hash_table 0x%0x ", s);
- scm_puts (str, p);
- Scheme_hash_table *me = unsmob(s);
- for (Scm_stl_map::const_iterator i = me->begin (); i != me->end(); i++)
- {
- scm_display ((*i).first, p);
- scm_puts (" = ",p);
- scm_display ((*i).second, p);
- scm_puts ("\n",p);
- }
+ sprintf (str, "#<Scheme_hash_table 0x%0lx ", SCM_UNPACK(s));
+ Scheme_hash_table *me = (Scheme_hash_table*) SCM_CELL_WORD_1 (s);
+ scm_display (me->hash_tab_, p);
scm_puts ("> ",p);
return 1;
}
bool
Scheme_hash_table::try_retrieve (SCM k, SCM *v)
{
- Scm_stl_map ::const_iterator i (find (k));
- bool found = i != end ();
- if (found)
- *v = (*i).second;
- return found;
+ SCM handle = scm_hashq_get_handle (hash_tab_, k);
+ if (ly_pair_p (handle))
+ {
+ *v = ly_cdr (handle);
+ return true;
+ }
+ else
+ return false;
+
}
bool
-Scheme_hash_table::elem_b (SCM k) const
+Scheme_hash_table::contains (SCM k) const
{
- Scm_stl_map::const_iterator i (find (k));
- return i != end ();
+ return ly_pair_p (scm_hashq_get_handle (hash_tab_, k));
}
void
Scheme_hash_table::set (SCM k, SCM v)
{
- (*this)[k] = v;
+ assert (gh_symbol_p (k));
+ SCM handle = scm_hashq_create_handle_x (hash_tab_, k, SCM_UNDEFINED);
+ if (ly_cdr (handle) == SCM_UNDEFINED)
+ {
+ elt_count_++;
+ }
+
+ gh_set_cdr_x (handle, v);
+
+ /*
+ resize if getting too large.
+ */
+ if (elt_count_ > 2 * SCM_VECTOR_LENGTH (hash_tab_))
+ {
+ SCM nh = scm_make_vector (gh_int2scm (3* elt_count_+1), SCM_EOL);
+ elt_count_ = copy_scm_hashes (nh, hash_tab_);
+ hash_tab_ = nh;
+ }
}
// UGH.
SCM
Scheme_hash_table::get (SCM k)const
{
- return (*(Scheme_hash_table*)this)[k];
+ /*
+ 42 will stick out like a sore thumb, hopefully.
+ */
+ return scm_hashq_ref (hash_tab_, k, SCM_MAKINUM(42));
}
+void
+Scheme_hash_table::remove (SCM k)
+{
+ scm_hashq_remove_x (hash_tab_, k);
+ /*
+ don't decrease elt_count_ , as this may cause underflow. The exact
+ value of elt_count_ is not important.
+ */
+}
-Scheme_hash_table::~Scheme_hash_table( )
+Scheme_hash_table::~Scheme_hash_table ()
{
}
Scheme_hash_table::to_alist () const
{
SCM l = SCM_EOL;
- for (Scm_stl_map ::const_iterator i = begin (); i != end(); i++)
- l = gh_cons (gh_cons ((*i).first, (*i).second), l);
+ for (int i = SCM_VECTOR_LENGTH (hash_tab_); i--;)
+ for (SCM s = scm_vector_ref (hash_tab_, gh_int2scm (i)); ly_pair_p(s); s = ly_cdr (s))
+ {
+ l = scm_acons (ly_caar (s), ly_cdar (s), l);
+ }
return l;
}
-IMPLEMENT_UNSMOB(Scheme_hash_table,scheme_hash);
-IMPLEMENT_SMOBS(Scheme_hash_table);
-IMPLEMENT_DEFAULT_EQUAL_P(Scheme_hash_table);
+
+
+
+IMPLEMENT_SMOBS (Scheme_hash_table);
+IMPLEMENT_DEFAULT_EQUAL_P (Scheme_hash_table);