1 files changed, 248 insertions, 0 deletions

diff --git a/libetpan/src/data-types/cinthash.c b/libetpan/src/data-types/cinthash.c
new file mode 100644
index 0000000..b59eb86
--- a/dev/null
+++ b/libetpan/src/data-types/cinthash.c
@@ -0,0 +1,248 @@
+/*
+ * libEtPan! -- a mail stuff library
+ *
+ * Copyright (C) 2001, 2005 - DINH Viet Hoa
+ * 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 libEtPan! project 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 AUTHORS 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 AUTHORS 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.
+ */
+
+/*
+ * $Id$
+ */
+
+#include <stdlib.h>
+#include "cinthash.h"
+
+struct cinthash_list {
+  unsigned long hash;
+  void * data;
+  struct cinthash_list * next;
+};
+
+static struct cinthash_list HASH_LISTHEAD_NEW = { 0, NULL, NULL };
+
+static inline int hash_list_add(cinthash_t * table,
+                                unsigned long hash, void * data)
+{
+  struct cinthash_list * ht;
+  int index;
+
+  index = hash % table->hashtable_size;
+
+  ht = malloc(sizeof(struct cinthash_list));
+  if (ht == NULL)
+    return -1;
+
+  ht->hash = hash;
+  ht->data = data;
+  ht->next = table->table[index].next;
+
+  table->table[index].next = ht;
+
+  return 0;
+}
+
+static inline void hash_list_free(struct cinthash_list * list)
+{
+  struct cinthash_list * cur;
+  struct cinthash_list * next;
+
+  next = list;
+  while (next != NULL) {
+    cur = next;
+    next = cur->next;
+    free(cur);
+  }
+}
+
+static inline int hash_list_remove(cinthash_t * table, unsigned long hash)
+{
+  struct cinthash_list * cur;
+  int index;
+
+  index = hash % table->hashtable_size;
+
+  for(cur = &table->table[index] ; cur->next != NULL ; cur = cur->next) {
+    if (cur->next->hash == hash) {
+      struct cinthash_list * hash_data;
+
+      hash_data = cur->next;
+      cur->next = cur->next->next;
+
+      free(hash_data);
+
+      return 0;
+    }
+  }
+
+  return -1;
+}
+
+static inline void * hash_list_find(cinthash_t * table, unsigned long hash)
+{
+  struct cinthash_list * cur;
+  int index;
+
+  index = hash % table->hashtable_size;
+
+  for(cur = table->table[index].next ; cur != NULL ; cur = cur->next) {
+    if (cur->hash == hash)
+      return cur->data;
+  }
+
+  return NULL;
+}
+
+cinthash_t * cinthash_new(unsigned long hashtable_size)
+{
+  cinthash_t * ht;
+  unsigned long i;
+
+  ht = malloc(sizeof(cinthash_t));
+  if (ht == NULL)
+    return NULL;
+
+  ht->table = malloc(sizeof(struct cinthash_list) * hashtable_size);
+  if (ht->table == NULL)
+    return NULL;
+
+  ht->hashtable_size = hashtable_size;
+  ht->count = 0;
+  
+  for(i = 0 ; i < hashtable_size ; i++)
+    ht->table[i] = HASH_LISTHEAD_NEW;
+
+  return ht;
+}
+
+void cinthash_free(cinthash_t * table)
+{
+  unsigned long i;
+
+  for(i = 0 ; i < table->hashtable_size ; i++)
+    hash_list_free(table->table[i].next);
+
+  free(table->table);
+
+  free(table);
+}
+
+int cinthash_add(cinthash_t * table, unsigned long hash, void * data)
+{
+  int index;
+
+  index = hash % table->hashtable_size;
+
+  if (table->table[index].data == NULL) {
+    table->table[index].hash = hash;
+    table->table[index].data = data;
+    table->table[index].next = NULL;
+
+    table->count ++;
+
+    return 0;
+  }
+  else {
+    int r;
+
+    r = hash_list_add(table, hash, data);
+    if (r == -1)
+      return -1;
+
+    table->count ++;
+
+    return 0;
+  }
+}
+
+int cinthash_remove(cinthash_t * table, unsigned long hash)
+{
+  int index;
+
+  index = hash % table->hashtable_size;
+
+  if (table->table[index].hash == hash) {
+    table->table[index].hash = 0;
+    table->table[index].data = NULL;
+
+    table->count --;
+
+    return 0;
+  }
+  else {
+    int r;
+
+    r = hash_list_remove(table, hash);
+
+    table->count --;
+    
+    return 0;
+  }
+}
+
+void * cinthash_find(cinthash_t * table, unsigned long hash)
+{
+  int index;
+
+  index = hash % table->hashtable_size;
+
+  if (table->table[index].hash == hash)
+    return table->table[index].data;
+ 
+  return hash_list_find(table, hash);
+}
+
+void cinthash_foreach_key(cinthash_t * table,
+                          void (* func)(unsigned long, void *),
+                          void * data)
+{
+  unsigned long index;
+  struct cinthash_list * cur;
+
+  for(index = 0 ; index < table->hashtable_size ; index ++) {
+    if (table->table[index].data != NULL) {
+      func(table->table[index].hash, data);
+      for(cur = table->table[index].next ; cur != NULL ; cur = cur->next)
+        func(cur->hash, data);
+    }
+  }
+}
+
+void cinthash_foreach_data(cinthash_t * table,
+                           void (* func)(void *, void *),
+                           void * data)
+{
+  unsigned long index;
+  struct cinthash_list * cur;
+
+  for(index = 0 ; index < table->hashtable_size ; index ++) {
+    if (table->table[index].data != NULL) {
+      func(table->table[index].data, data);
+      for(cur = table->table[index].next ; cur != NULL ; cur = cur->next)
+        func(cur->data, data);
+    }
+  }
+}