merges r24637 from trunk into ruby_1_9_1.

--
* st.c (st_delete_safe): deals with packed entries.
  [ruby-core:25080]

* st.c (st_cleanup_safe): ditto.  [ruby-core:25081]

git-svn-id: http://svn.ruby-lang.org/repos/ruby/branches/ruby_1_9_1@25543 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 28 insertions, 0 deletions

diff --git a/st.c b/st.c
index 6e42270a9..c6821467b 100644
--- a/st.c
+++ b/st.c
@@ -573,6 +573,19 @@ st_delete_safe(register st_table *table, register st_data_t *key, st_data_t *val
     unsigned int hash_val;
     register st_table_entry *ptr;
 
+    if (table->entries_packed) {
+	st_index_t i;
+	for (i = 0; i < table->num_entries; i++) {
+	    if ((st_data_t)table->bins[i*2] == *key) {
+		if (value != 0) *value = (st_data_t)table->bins[i*2+1];
+		table->bins[i*2] = (void *)never;
+		return 1;
+	    }
+	}
+	if (value != 0) *value = 0;
+	return 0;
+    }
+
     hash_val = do_hash_bin(*key, table);
     ptr = table->bins[hash_val];
 
@@ -596,6 +609,21 @@ st_cleanup_safe(st_table *table, st_data_t never)
     st_table_entry *ptr, **last, *tmp;
     int i;
 
+    if (table->entries_packed) {
+	st_index_t i = 0, j = 0;
+	while ((st_data_t)table->bins[i*2] != never) {
+	    if (i++ == table->num_entries) return;
+	}
+	for (j = i; ++i < table->num_entries;) {
+	    if ((st_data_t)table->bins[i*2] == never) continue;
+	    table->bins[j*2] = table->bins[i*2];
+	    table->bins[j*2+1] = table->bins[i*2+1];
+	    j++;
+	}
+	table->num_entries = j;
+	return;
+    }
+
     for (i = 0; i < table->num_bins; i++) {
 	ptr = *(last = &table->bins[i]);
 	while (ptr != 0) {