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/** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** **
* This file is part of clib library
* Copyright (C) 2011 Avinash Dongre ( dongre.avinash@gmail.com )
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** **/
#include "c_lib.h"
#include <string.h>
#define CLIB_DEQUE_INDEX(x) ((char *)(pDeq)->pElements + (sizeof(struct clib_object) * (x)))
static clib_error
insert_clib_deque ( struct clib_deque *pDeq, int index, void *elem,size_t elem_size) {
clib_error rc = CLIB_ERROR_SUCCESS;
struct clib_object* pObject = new_clib_object ( elem, elem_size );
if ( ! pObject )
return CLIB_ARRAY_INSERT_FAILED;
pDeq->pElements[index] = pObject;
pDeq->no_of_elements++;
return rc;
}
static struct clib_deque*
grow_deque ( struct clib_deque *pDeq ) {
pDeq->no_max_elements = pDeq->no_max_elements * 2;
pDeq->pElements = (struct clib_object**) realloc ( pDeq->pElements,
pDeq->no_max_elements * sizeof ( struct clib_object*));
return pDeq;
}
struct clib_deque*
new_clib_deque( int deq_size , clib_compare fn_c, clib_destroy fn_d) {
struct clib_deque *pDeq = (struct clib_deque*)malloc(sizeof(struct clib_deque));
if ( pDeq == (struct clib_deque*)0 )
return (struct clib_deque*)0;
pDeq->no_max_elements = deq_size < 8 ? 8 : deq_size;
pDeq->pElements = (struct clib_object**) malloc(pDeq->no_max_elements * sizeof(struct clib_object*));
if ( pDeq == (struct clib_deque*)0 )
return (struct clib_deque*)0;
pDeq->compare_fn = fn_c;
pDeq->destruct_fn = fn_d;
pDeq->head = (int)pDeq->no_max_elements / 2;
pDeq->tail = pDeq->head + 1;
pDeq->no_of_elements = 0;
return pDeq;
}
clib_error
push_back_clib_deque(struct clib_deque *pDeq, void *elem, size_t elem_size) {
if ( pDeq == (struct clib_deque*)0 )
return CLIB_DEQUE_NOT_INITIALIZED;
if ( pDeq->tail == pDeq->no_max_elements )
pDeq = grow_deque(pDeq);
insert_clib_deque(pDeq, pDeq->tail, elem, elem_size);
pDeq->tail++;
return CLIB_ERROR_SUCCESS;
}
clib_error
push_front_clib_deque(struct clib_deque *pDeq, void *elem,size_t elem_size) {
clib_error rc = CLIB_ERROR_SUCCESS;
int to = 0;
int from = 0;
int count = 0;
if ( pDeq->head == 0 ) {
pDeq = grow_deque(pDeq);
to = (pDeq->no_max_elements - pDeq->no_of_elements)/2;
from = pDeq->head + 1;
count = pDeq->tail - from + 1;
memmove (&(pDeq->pElements[to]), &(pDeq->pElements[from]), count * sizeof (struct clib_object*));
pDeq->head = to - 1;
pDeq->tail = pDeq->head + count;
}
insert_clib_deque(pDeq, pDeq->head, elem, elem_size);
pDeq->head--;
return rc;
}
clib_error
front_clib_deque (struct clib_deque *pDeq, void *elem) {
if ( pDeq == (struct clib_deque*)0 )
return CLIB_DEQUE_NOT_INITIALIZED;
element_at_clib_deque ( pDeq, pDeq->head + 1, elem );
return CLIB_ERROR_SUCCESS;
}
clib_error
back_clib_deque (struct clib_deque *pDeq, void *elem) {
if ( pDeq == (struct clib_deque*)0 )
return CLIB_DEQUE_NOT_INITIALIZED;
element_at_clib_deque ( pDeq, pDeq->tail - 1, elem );
return CLIB_ERROR_SUCCESS;
}
clib_error
pop_back_clib_deque (struct clib_deque *pDeq) {
if ( pDeq == (struct clib_deque*)0 )
return CLIB_DEQUE_NOT_INITIALIZED;
if ( pDeq->destruct_fn ) {
void *elem;
if ( element_at_clib_deque( pDeq, pDeq->tail - 1, &elem ) == CLIB_ERROR_SUCCESS )
pDeq->destruct_fn(elem);
}
delete_clib_object(pDeq->pElements[pDeq->tail - 1]);
pDeq->tail--;
pDeq->no_of_elements--;
return CLIB_ERROR_SUCCESS;
}
clib_error
pop_front_clib_deque(struct clib_deque *pDeq) {
if ( pDeq == (struct clib_deque*)0 )
return CLIB_DEQUE_NOT_INITIALIZED;
if ( pDeq->destruct_fn ) {
void *elem;
if ( element_at_clib_deque( pDeq, pDeq->head + 1, &elem ) == CLIB_ERROR_SUCCESS )
pDeq->destruct_fn(elem);
}
delete_clib_object(pDeq->pElements[pDeq->head + 1]);
pDeq->head++;
pDeq->no_of_elements--;
return CLIB_ERROR_SUCCESS;
}
clib_bool
empty_clib_deque (struct clib_deque *pDeq) {
if ( pDeq == (struct clib_deque*)0 )
return clib_true;
return pDeq->no_of_elements == 0 ? clib_true : clib_false;
}
int
size_clib_deque( struct clib_deque *pDeq ) {
if ( pDeq == (struct clib_deque*)0 )
return clib_true;
return pDeq->no_of_elements - 1;
}
clib_error
element_at_clib_deque (struct clib_deque *pDeq, int index, void**elem) {
clib_error rc = CLIB_ERROR_SUCCESS;
if ( ! pDeq )
return CLIB_DEQUE_NOT_INITIALIZED;
get_raw_clib_object ( pDeq->pElements[index], elem );
return rc;
}
clib_error
delete_clib_deque ( struct clib_deque *pDeq ) {
int i = 0;
if ( pDeq == (struct clib_deque*)0 )
return CLIB_ERROR_SUCCESS;
if ( pDeq->destruct_fn ) {
for ( i = pDeq->head + 1; i < pDeq->tail; i++ ){
void *elem;
if ( element_at_clib_deque( pDeq, i, &elem ) == CLIB_ERROR_SUCCESS ) {
pDeq->destruct_fn(elem);
}
}
}
for ( i = pDeq->head + 1; i < pDeq->tail; i++ ){
delete_clib_object(pDeq->pElements[i]);
}
free ( pDeq->pElements);
free ( pDeq );
return CLIB_ERROR_SUCCESS;
}
void
for_each_clib_deque ( struct clib_deque *pDeq, void (*fn)(void*)) {
int index = 0;
for ( index = pDeq->head + 1; index < pDeq->tail; index++ ){
void *elem;
if ( element_at_clib_deque( pDeq, index, &elem ) == CLIB_ERROR_SUCCESS ) {
(fn)(elem);
free ( elem );
}
}
}
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