1 files changed, 236 insertions, 0 deletions

diff --git a/src/lib/libcrypto/pqueue/pqueue.c b/src/lib/libcrypto/pqueue/pqueue.c
new file mode 100644
index 0000000000..5cc18527f8
--- /dev/null
+++ b/src/lib/libcrypto/pqueue/pqueue.c
@@ -0,0 +1,236 @@
+/* crypto/pqueue/pqueue.c */
+/* 
+ * DTLS implementation written by Nagendra Modadugu
+ * (nagendra@cs.stanford.edu) for the OpenSSL project 2005.  
+ */
+/* ====================================================================
+ * Copyright (c) 1999-2005 The OpenSSL Project.  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. All advertising materials mentioning features or use of this
+ *    software must display the following acknowledgment:
+ *    "This product includes software developed by the OpenSSL Project
+ *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
+ *
+ * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
+ *    endorse or promote products derived from this software without
+ *    prior written permission. For written permission, please contact
+ *    openssl-core@OpenSSL.org.
+ *
+ * 5. Products derived from this software may not be called "OpenSSL"
+ *    nor may "OpenSSL" appear in their names without prior written
+ *    permission of the OpenSSL Project.
+ *
+ * 6. Redistributions of any form whatsoever must retain the following
+ *    acknowledgment:
+ *    "This product includes software developed by the OpenSSL Project
+ *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
+ * EXPRESSED 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 OpenSSL PROJECT OR
+ * ITS 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.
+ * ====================================================================
+ *
+ * This product includes cryptographic software written by Eric Young
+ * (eay@cryptsoft.com).  This product includes software written by Tim
+ * Hudson (tjh@cryptsoft.com).
+ *
+ */
+
+#include "cryptlib.h"
+#include <openssl/bn.h>
+#include "pqueue.h"
+
+typedef struct _pqueue
+        {
+        pitem *items;
+        int count;
+        } pqueue_s;
+
+pitem *
+pitem_new(PQ_64BIT priority, void *data)
+        {
+        pitem *item = (pitem *) OPENSSL_malloc(sizeof(pitem));
+        if (item == NULL) return NULL;
+
+        pq_64bit_init(&(item->priority));
+        pq_64bit_assign(&item->priority, &priority);
+
+        item->data = data;
+        item->next = NULL;
+
+        return item;
+        }
+
+void
+pitem_free(pitem *item)
+        {
+        if (item == NULL) return;
+
+        pq_64bit_free(&(item->priority));
+        OPENSSL_free(item);
+        }
+
+pqueue_s *
+pqueue_new()
+        {
+        pqueue_s *pq = (pqueue_s *) OPENSSL_malloc(sizeof(pqueue_s));
+        if (pq == NULL) return NULL;
+
+        memset(pq, 0x00, sizeof(pqueue_s));
+        return pq;
+        }
+
+void
+pqueue_free(pqueue_s *pq)
+        {
+        if (pq == NULL) return;
+
+        OPENSSL_free(pq);
+        }
+
+pitem *
+pqueue_insert(pqueue_s *pq, pitem *item)
+        {
+        pitem *curr, *next;
+
+        if (pq->items == NULL)
+                {
+                pq->items = item;
+                return item;
+                }
+
+        for(curr = NULL, next = pq->items; 
+                next != NULL;
+                curr = next, next = next->next)
+                {
+                if (pq_64bit_gt(&(next->priority), &(item->priority)))
+                        {
+                        item->next = next;
+
+                        if (curr == NULL) 
+                                pq->items = item;
+                        else  
+                                curr->next = item;
+
+                        return item;
+                        }
+                /* duplicates not allowed */
+                if (pq_64bit_eq(&(item->priority), &(next->priority)))
+                        return NULL;
+                }
+
+        item->next = NULL;
+        curr->next = item;
+
+        return item;
+        }
+
+pitem *
+pqueue_peek(pqueue_s *pq)
+        {
+        return pq->items;
+        }
+
+pitem *
+pqueue_pop(pqueue_s *pq)
+        {
+        pitem *item = pq->items;
+
+        if (pq->items != NULL)
+                pq->items = pq->items->next;
+
+        return item;
+        }
+
+pitem *
+pqueue_find(pqueue_s *pq, PQ_64BIT priority)
+        {
+        pitem *next, *prev = NULL;
+        pitem *found = NULL;
+
+        if ( pq->items == NULL)
+                return NULL;
+
+        for ( next = pq->items; next->next != NULL; 
+                  prev = next, next = next->next)
+                {
+                if ( pq_64bit_eq(&(next->priority), &priority))
+                        {
+                        found = next;
+                        break;
+                        }
+                }
+        
+        /* check the one last node */
+        if ( pq_64bit_eq(&(next->priority), &priority))
+                found = next;
+
+        if ( ! found)
+                return NULL;
+
+#if 0 /* find works in peek mode */
+        if ( prev == NULL)
+                pq->items = next->next;
+        else
+                prev->next = next->next;
+#endif
+
+        return found;
+        }
+
+#if PQ_64BIT_IS_INTEGER
+void
+pqueue_print(pqueue_s *pq)
+        {
+        pitem *item = pq->items;
+
+        while(item != NULL)
+                {
+                printf("item\t" PQ_64BIT_PRINT "\n", item->priority);
+                item = item->next;
+                }
+        }
+#endif
+
+pitem *
+pqueue_iterator(pqueue_s *pq)
+        {
+        return pqueue_peek(pq);
+        }
+
+pitem *
+pqueue_next(pitem **item)
+        {
+        pitem *ret;
+
+        if ( item == NULL || *item == NULL)
+                return NULL;
+
+
+        /* *item != NULL */
+        ret = *item;
+        *item = (*item)->next;
+
+        return ret;
+        }