/*
- scm-hash.cc -- implement Scheme_hash_table
+ This file is part of LilyPond, the GNU music typesetter.
- source file of the GNU LilyPond music typesetter
+ Copyright (C) 1999--2015 Han-Wen Nienhuys <hanwen@xs4all.nl>
- (c) 1999--2005 Han-Wen Nienhuys <hanwen@cs.uu.nl>
-*/
-
-#include "scm-hash.hh"
-
-#include <cstdio>
-#include <algorithm>
-
-#include "ly-smobs.icc"
+ LilyPond is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
-using namespace std;
+ LilyPond is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
-/*
- Return: number of objects.
+ You should have received a copy of the GNU General Public License
+ along with LilyPond. If not, see <http://www.gnu.org/licenses/>.
*/
-int
-copy_scm_hashes (SCM dest, SCM src)
-{
- int k = 0;
- for (int i = scm_c_vector_length (src); i--;)
- for (SCM s = scm_vector_ref (src, scm_from_int (i)); scm_is_pair (s); s = scm_cdr (s))
- {
- scm_hashq_set_x (dest, scm_caar (s), scm_cdar (s));
- k++;
- }
- return k;
-}
-Scheme_hash_table::Scheme_hash_table ()
-{
- hash_tab_ = SCM_EOL;
- smobify_self ();
- hash_tab_ = scm_make_vector (scm_from_int (119), SCM_EOL);
- elt_count_ = 0;
-}
-
-Scheme_hash_table::Scheme_hash_table (Scheme_hash_table const &src)
-
-{
- hash_tab_ = SCM_EOL;
- elt_count_ = 0;
- smobify_self ();
-
- hash_tab_ = scm_make_vector (scm_from_int (max ((int) 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)
-{
- if (&src == this)
- return;
+#include "scm-hash.hh"
- hash_tab_ = scm_make_vector (scm_from_int (max ((int) src.elt_count_, 11)), SCM_EOL);
- elt_count_ = copy_scm_hashes (hash_tab_, src.hash_tab_);
-}
-
-Scheme_hash_table::~Scheme_hash_table ()
-{
-}
+#include <cassert>
SCM
-Scheme_hash_table::mark_smob (SCM s)
+Scheme_hash_table::make_smob ()
{
- Scheme_hash_table *me = (Scheme_hash_table *) SCM_CELL_WORD_1 (s);
- scm_gc_mark (me->hash_tab_);
- return SCM_EOL;
+ return Smob1::make_smob (scm_c_make_hash_table (119));
}
int
-Scheme_hash_table::print_smob (SCM s, SCM p, scm_print_state*)
+Scheme_hash_table::print_smob (SCM p, scm_print_state *) const
{
- assert (unsmob (s));
scm_puts ("#<Scheme_hash_table ", p);
- Scheme_hash_table *me = (Scheme_hash_table *) SCM_CELL_WORD_1 (s);
- scm_display (me->hash_tab_, p);
+ scm_display (hash_tab (), p);
scm_puts ("> ", p);
return 1;
}
bool
Scheme_hash_table::try_retrieve (SCM k, SCM *v)
{
- SCM handle = scm_hashq_get_handle (hash_tab_, k);
+
+ SCM handle = scm_hashq_get_handle (hash_tab (), k);
if (scm_is_pair (handle))
{
*v = scm_cdr (handle);
bool
Scheme_hash_table::contains (SCM k) const
{
- return scm_is_pair (scm_hashq_get_handle (hash_tab_, k));
+ return scm_is_pair (scm_hashq_get_handle (hash_tab (), k));
}
void
Scheme_hash_table::set (SCM k, SCM v)
{
assert (scm_is_symbol (k));
- SCM handle = scm_hashq_create_handle_x (hash_tab_, k, SCM_UNDEFINED);
- if (scm_cdr (handle) == SCM_UNDEFINED)
- elt_count_++;
-
+ SCM handle = scm_hashq_create_handle_x (hash_tab (), k, SCM_UNDEFINED);
scm_set_cdr_x (handle, v);
-
- /*
- resize if getting too large.
- */
- if (elt_count_ > 2 * scm_c_vector_length (hash_tab_))
- {
- SCM nh = scm_make_vector (scm_from_int (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
{
- /*
- 42 will stick out like a sore thumb, hopefully.
+ /* SCM_UNDEFINED is the default for unset elements, but
+ scm_hashq_ref cannot return it, so we do it a bit more awkwardly.
*/
- return scm_hashq_ref (hash_tab_, k, scm_from_int (42));
+ SCM handle = scm_hashq_get_handle (hash_tab (), k);
+ if (scm_is_pair (handle))
+ return scm_cdr (handle);
+ return SCM_UNDEFINED;
}
void
Scheme_hash_table::remove (SCM k)
{
- scm_hashq_remove_x (hash_tab_, k);
- /* Do not decrease elt_count_ as this may cause underflow. The exact
- value of elt_count_ is not important. */
+ scm_hashq_remove_x (hash_tab (), k);
+}
+
+static SCM
+collect_handles (void * /* closure */,
+ SCM key,
+ SCM value,
+ SCM result)
+{
+ return scm_acons (key, value, result);
}
SCM
Scheme_hash_table::to_alist () const
{
- SCM lst = SCM_EOL;
- for (int i = scm_c_vector_length (hash_tab_); i--;)
- for (SCM s = scm_vector_ref (hash_tab_, scm_from_int (i)); scm_is_pair (s);
- s = scm_cdr (s))
- lst = scm_acons (scm_caar (s), scm_cdar (s), lst);
- return lst;
+ return scm_internal_hash_fold ((scm_t_hash_fold_fn) &collect_handles,
+ NULL, SCM_EOL, hash_tab ());
}
-
-IMPLEMENT_SMOBS (Scheme_hash_table);
-IMPLEMENT_DEFAULT_EQUAL_P (Scheme_hash_table);
projects / lilypond.git / blobdiff