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/**
\file databuffer.c
Network buffer handling routines.
OpenOBEX library - Free implementation of the Object Exchange protocol.
Copyright (c) 2005 Herton Ronaldo Krzesinski, All Rights Reserved.
OpenOBEX is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as
published by the Free Software Foundation; either version 2.1 of
the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with OpenOBEX. If not, see <http://www.gnu.org/>.
*/
#include "databuffer.h"
#include "obex_main.h"
#include <assert.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
int slist_has_more(slist_t *list)
{
return (!slist_is_empty(list) && !slist_is_empty(list->next));
}
void *slist_get(slist_t *list)
{
if (slist_is_empty(list))
return NULL;
else
return list->data;
}
slist_t *slist_append(slist_t *list, void *element)
{
slist_t *node, *p;
node = malloc(sizeof(*node));
assert(node != NULL);
node->data = element;
node->next = NULL;
if (!list)
return node;
p = list;
while (p->next)
p = p->next;
p->next = node;
return list;
}
slist_t *slist_remove(slist_t *list, void *element)
{
slist_t *prev, *next;
if (!list)
return NULL;
prev = list;
next = list;
while (next != NULL) {
if (next->data == element) {
/* if first element, update list pointer */
if (next == list) {
list = list->next;
prev = list;
free(next);
next = prev;
} else {
prev->next = next->next;
free(next);
next = prev->next;
}
continue;
}
prev = next;
next = next->next;
}
return list;
}
struct databuffer *buf_create(size_t default_size, struct databuffer_ops *ops) {
struct databuffer *self = malloc(sizeof(*self));
if (!self)
return NULL;
self->ops = ops;
self->ops_data = self->ops->new(default_size);
if (!self->ops_data) {
free(self);
return NULL;
}
return self;
}
void buf_delete(struct databuffer *self) {
if (self->ops->delete)
self->ops->delete(self->ops_data);
free(self);
}
size_t buf_get_offset(struct databuffer *self) {
if (self->ops->get_offset)
return self->ops->get_offset(self->ops_data);
else
return 0;
}
void buf_set_offset(struct databuffer *self, size_t offset) {
if (self->ops->set_offset)
self->ops->set_offset(self->ops_data, offset);
}
size_t buf_get_size(struct databuffer *self) {
if (self->ops->get_size)
return self->ops->get_size(self->ops_data);
else
return 0;
}
int buf_set_size(struct databuffer *self, size_t new_size) {
if (self->ops->set_size)
return self->ops->set_size(self->ops_data, new_size);
else
return 0;
}
size_t buf_get_length(const struct databuffer *self) {
if (self->ops->get_length)
return self->ops->get_length(self->ops_data);
else
return 0;
}
void *buf_get(const struct databuffer *self) {
if (self->ops->get)
return self->ops->get(self->ops_data);
else
return NULL;
}
void buf_clear(struct databuffer *self, size_t len) {
if (self->ops->clear)
self->ops->clear(self->ops_data, len);
}
int buf_append(struct databuffer *self, const void *data, size_t len) {
if (self->ops->append)
return self->ops->append(self->ops_data, data, len);
else
return -EINVAL;
}
void buf_dump(buf_t *p, const char *label)
{
unsigned int i, n;
if (!p || !label)
return;
n = 0;
for (i = 0; i < buf_get_length(p); ++i) {
if (n == 0)
log_debug("%s%s(%04x):", log_debug_prefix, label, i);
log_debug(" %02X", *((uint8_t *)buf_get(p) + i));
if (n >= 0xF || i == buf_get_length(p) - 1) {
log_debug("\n");
n = 0;
} else
n++;
}
}
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