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Diffstat (limited to 'thirdparty/openssl/crypto/pqueue/pqueue.c')
| -rw-r--r-- | thirdparty/openssl/crypto/pqueue/pqueue.c | 235 |
1 files changed, 235 insertions, 0 deletions
diff --git a/thirdparty/openssl/crypto/pqueue/pqueue.c b/thirdparty/openssl/crypto/pqueue/pqueue.c new file mode 100644 index 0000000000..75f9734931 --- /dev/null +++ b/thirdparty/openssl/crypto/pqueue/pqueue.c @@ -0,0 +1,235 @@ +/* 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(unsigned char *prio64be, void *data) +{ + pitem *item = (pitem *)OPENSSL_malloc(sizeof(pitem)); + if (item == NULL) + return NULL; + + memcpy(item->priority, prio64be, sizeof(item->priority)); + + item->data = data; + item->next = NULL; + + return item; +} + +void pitem_free(pitem *item) +{ + if (item == NULL) + return; + + 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) { + /* + * we can compare 64-bit value in big-endian encoding with memcmp:-) + */ + int cmp = memcmp(next->priority, item->priority, 8); + if (cmp > 0) { /* next > item */ + item->next = next; + + if (curr == NULL) + pq->items = item; + else + curr->next = item; + + return item; + } + + else if (cmp == 0) /* duplicates not allowed */ + 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, unsigned char *prio64be) +{ + pitem *next; + pitem *found = NULL; + + if (pq->items == NULL) + return NULL; + + for (next = pq->items; next->next != NULL; next = next->next) { + if (memcmp(next->priority, prio64be, 8) == 0) { + found = next; + break; + } + } + + /* check the one last node */ + if (memcmp(next->priority, prio64be, 8) == 0) + 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; +} + +void pqueue_print(pqueue_s *pq) +{ + pitem *item = pq->items; + + while (item != NULL) { + printf("item\t%02x%02x%02x%02x%02x%02x%02x%02x\n", + item->priority[0], item->priority[1], + item->priority[2], item->priority[3], + item->priority[4], item->priority[5], + item->priority[6], item->priority[7]); + item = item->next; + } +} + +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; +} + +int pqueue_size(pqueue_s *pq) +{ + pitem *item = pq->items; + int count = 0; + + while (item != NULL) { + count++; + item = item->next; + } + return count; +} |