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/*
* Copyright (C) 2004-2010, Eric Lund
* http://www.mvpmc.org/
*
* This library 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 library 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 this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/*
* rec_num.c - functions to manage recorder number structures. Mostly
* just allocating, freeing, and filling them out.
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <cmyth_local.h>
/*
* cmyth_rec_num_destroy(cmyth_rec_num_t rn)
*
* Scope: PRIVATE (static)
*
* Description
*
* Destroy and release all storage associated with the recorder number
* structure 'rn'. This function should only ever be called by
* cmyth_rec_num_release(). All others should call
* cmyth_rec_num_release() to free rec_num structures.
*
* Return Value:
*
* None.
*/
static void
cmyth_rec_num_destroy(cmyth_rec_num_t rn)
{
cmyth_dbg(CMYTH_DBG_DEBUG, "%s\n", __FUNCTION__);
if (!rn) {
return;
}
if (rn->recnum_host) {
ref_release(rn->recnum_host);
}
}
/*
* cmyth_rec_num_create(void)
*
* Scope: PUBLIC
*
* Description
*
* Create a recorder number structure.
*
* Return Value:
*
* Success: A non-NULL cmyth_rec_num_t (this type is a pointer)
*
* Failure: A NULL cmyth_rec_num_t
*/
cmyth_rec_num_t
cmyth_rec_num_create(void)
{
cmyth_rec_num_t ret = ref_alloc(sizeof(*ret));
cmyth_dbg(CMYTH_DBG_DEBUG, "%s\n", __FUNCTION__);
if (!ret) {
return NULL;
}
ref_set_destroy(ret, (ref_destroy_t)cmyth_rec_num_destroy);
ret->recnum_host = NULL;
ret->recnum_port = 0;
ret->recnum_id = 0;
return ret;
}
/*
* cmyth_rec_num_hold(cmyth_rec_num_t p)
*
* Scope: PUBLIC
*
* Description
*
* Take a new reference to a rec_num structure. Rec_Num structures
* are reference counted to facilitate caching of pointers to them.
* This allows a holder of a pointer to release their hold and trust
* that once the last reference is released the rec_num will be
* destroyed. This function is how one creates a new holder of a
* rec_num. This function always returns the pointer passed to it.
* While it cannot fail, if it is passed a NULL pointer, it will do
* nothing.
*
* Return Value:
*
* Success: The value of 'p'
*
* Failure: There is no real failure case, but a NULL 'p' will result in a
* NULL return.
*/
cmyth_rec_num_t
cmyth_rec_num_hold(cmyth_rec_num_t p)
{
cmyth_dbg(CMYTH_DBG_DEBUG, "%s\n", __FUNCTION__);
return ref_hold(p);
}
/*
* cmyth_rec_num_release(cmyth_rec_num_t p)
*
* Scope: PUBLIC
*
* Description
*
* Release a reference to a rec_num structure. Rec_Num structures
* are reference counted to facilitate caching of pointers to them.
* This allows a holder of a pointer to release their hold and trust
* that once the last reference is released the rec_num will be
* destroyed. This function is how one drops a reference to a
* rec_num.
*
* Return Value:
*
* None.
*/
void
cmyth_rec_num_release(cmyth_rec_num_t p)
{
cmyth_dbg(CMYTH_DBG_DEBUG, "%s\n", __FUNCTION__);
ref_release(p);
}
/*
* cmyth_rec_num_get(char *host,
* unsigned short port,
* unsigned id)
*
* Scope: PUBLIC
*
* Description
*
* Create a recorder number structure 'rn' using the values 'host',
* 'port', and 'id'.
*
* Return Value:
*
* Success: A new cmyth_rec_num (this is a ppointer type)
*
* Failure: NULL
*/
cmyth_rec_num_t
cmyth_rec_num_get(char *host,
unsigned short port,
unsigned id)
{
cmyth_rec_num_t ret;
if ((ret = cmyth_rec_num_create()) == NULL) {
return NULL;
}
ret->recnum_host = ref_strdup(host);
if (!ret->recnum_host) {
ref_release(ret);
return NULL;
}
ret->recnum_port = port;
ret->recnum_id = id;
return ret;
}
/*
* cmyth_rec_num_string(cmyth_rec_num_t rn)
*
* Scope: PUBLIC
*
* Description
*
* Compose a MythTV protocol string from a rec_num structure and
* return a pointer to a malloc'ed buffer containing the string.
*
* Return Value:
*
* Success: A non-NULL malloc'ed character buffer pointer.
*
* Failure: NULL
*/
char *
cmyth_rec_num_string(cmyth_rec_num_t rn)
{
unsigned len = sizeof("[]:[][]:[]");
char id[16];
char port[8];
char *ret;
if (!rn) {
return NULL;
}
if (!rn->recnum_host) {
return NULL;
}
sprintf(id, "%d", rn->recnum_id);
len += strlen(id);
sprintf(port, "%d", rn->recnum_port);
len += strlen(port);
len += strlen(rn->recnum_host);
ret = malloc((len + 1) * sizeof(char));
if (!ret) {
return NULL;
}
strcpy(ret, id);
strcat(ret, "[]:[]");
strcat(ret, rn->recnum_host);
strcat(ret, "[]:[]");
strcat(ret, port);
return ret;
}
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