1 files changed, 120 insertions, 0 deletions
diff --git a/libbanshee/engine/stamp.c b/libbanshee/engine/stamp.c
new file mode 100644
index 00000000000..8a1f5a95faf
--- /dev/null
+++ b/libbanshee/engine/stamp.c
@@ -0,0 +1,120 @@
+/*
+ * Copyright (c) 2000-2001
+ *      The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ */
+
+#include <stdio.h>
+#include "stamp.h"
+#include "util.h"
+#include "hash.h"
+#include "list.h"
+#define INITIAL_SIZE 32
+#define INITIAL1 0
+#define INITIAL2 2000
+#define INITIAL3 536870911
+#define MIN -1073741824 /* -2^30 */
+#define MAX  1073741824 /* 2^30 */
+
+static hash_table str_hash;
+static region str_hash_rgn;
+
+static int count1 = INITIAL1, count2 = INITIAL2, count3 = INITIAL3;
+static int bounds1 = MIN, bounds2 = 536870911, bounds3 = MAX;
+
+static inline stamp check1(int i)
+{
+  if (i <= bounds1)
+    fail ("Unable to create stamp with small index\n");
+  return i;
+}
+
+static inline stamp check2(int i)
+{
+  if (i > bounds2)
+    fail ("Unable to create a stamp with regular index\n");
+  return i;
+}
+
+static inline stamp check3(int i)
+{
+  if (i >= bounds3)
+    fail ("Unable to create a stamp with large index\n");
+  return i;
+}
+
+stamp stamp_fresh(void)
+{
+  return (check2(++count2));
+}
+
+stamp stamp_fresh_small(void)
+{
+  return (check1(--count1));
+}
+
+stamp stamp_fresh_large(void)
+{
+  return (check3(++count3));
+}
+
+stamp stamp_string(const char *str) deletes
+{
+  long st;
+  assert(str_hash != NULL);
+
+  if (! hash_table_lookup(str_hash,(hash_key)str, (void *)(char *) &st))
+    {
+      st = stamp_fresh();
+      (void)hash_table_insert(str_hash,(hash_key)str,(hash_data) st);
+    }
+  return st;
+}
+
+void stamp_reset(void) deletes
+{
+  count1 = INITIAL1;
+  count2 = INITIAL2;
+  count3 = INITIAL3;
+  hash_table_reset(str_hash);
+  deleteregion_ptr(&str_hash_rgn);
+}
+
+
+
+void stamp_init(void)
+{
+  str_hash_rgn = newregion();
+  str_hash = make_string_hash_table(str_hash_rgn,INITIAL_SIZE,FALSE);
+
+}
+#if 0
+const char *stamp_to_str(region r,stamp st)
+{
+  return inttostr(r,st);
+}
+#endif