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adds new function iov_FreePairs

/*************************************************************************
* (C) 2021 AITNET ltd - Sofia/Bulgaria - <misho@aitnet.org>
*  by Michael Pounov <misho@elwix.org>
*
* $Author: misho $
* $Id: aiov.h,v 1.1.2.5 2021/03/21 01:31:07 misho Exp $
*
**************************************************************************
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All of the documentation and software included in the ELWIX and AITNET
Releases is copyrighted by ELWIX - Sofia/Bulgaria <info@elwix.org>

Copyright 2004 - 2021
	by Michael Pounov <misho@elwix.org>.  All rights reserved.

Redistribution and use in source and binary forms, with or without
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   notice, this list of conditions and the following disclaimer.
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   must display the following acknowledgement:
This product includes software developed by Michael Pounov <misho@elwix.org>
ELWIX - Embedded LightWeight unIX and its contributors.
4. Neither the name of AITNET nor the names of its contributors
   may be used to endorse or promote products derived from this software
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THIS SOFTWARE IS PROVIDED BY AITNET AND CONTRIBUTORS ``AS IS'' AND
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*/
#ifndef __AIOV_H
#define __AIOV_H


struct tagIOV {
	size_t		iov_size;
	struct iovec	*iov_array;
};
typedef struct tagIOV iovec_t;

#define iov_Size(x)	(x)->iov_size
#define iov_Array(x)	(x)->iov_array

/*
 * iov_Init() - Init new iovec array
 *
 * return: =NULL error, !=NULL ready array
 */
iovec_t *iov_Init();
/*
 * iov_Destroy() - Destroy iovec array
 *
 * @iov = iovec array
 * return: none
 */
void iov_Destroy(iovec_t ** __restrict iov);
/*
 * iov_Get() - Get data and length from position
 *
 * @iov = iovec array
 * @pos = position
 * @data = data
 * @datlen = data length
 * return: -1 error, 0 ok
 */
int iov_Get(iovec_t * __restrict iov, unsigned int pos, void *data, size_t *datlen);
/*
 * iov_Insert() - Insert data at position into array
 *
 * @iov = iovec array
 * @pos = position
 * @data = data
 * @datlen = data length
 * return: -1 error, 0 ok
 */
int iov_Insert(iovec_t * __restrict iov, unsigned int pos, void *data, size_t datlen);
/*
 * iov_Delete() - Delete data at position into array
 *
 * @iov = iovec array
 * @pos = position
 * @mustfree = data must be free before delete
 * return: -1 error, 0 ok
 */
int iov_Delete(iovec_t * __restrict iov, unsigned int pos, int mustfree);
/*
 * iov_Push() - Push data on first free position
 *
 * @iov = iovec array
 * @data = data
 * @datlen = data length
 * return: -1 error, !=-1 pushed at position
 */
int iov_Push(iovec_t * __restrict iov, void *data, size_t datlen);
/*
 * iov_Pop() - Pop data from last used position
 *
 * @iov = iovec array
 * @data = data
 * @datlen = data length
 * @mustfree = data must be free before delete
 * return: -1 error, !=-1 poped from position
 */
int iov_Pop(iovec_t * __restrict iov, void *data, size_t *datlen, int mustfree);
/*
 * iov_PushPair() - Push pair/named data on first free position
 *
 * @iov = iovec array
 * @name = name of data
 * @data = data
 * @datlen = data length
 * return: -1 error, !=-1 pushed at position
 */
int iov_PushPair(iovec_t * __restrict iov, const char *name, void *data, size_t datlen);
/*
 * iov_PopPair() - Pop pair/named data from last used position
 *
 * @iov = iovec array
 * @name = name of data
 * @namlen = name length
 * @data = data
 * @datlen = data length
 * @mustfree = data must be free before delete
 * return: -1 error, !=-1 poped from position
 */
int iov_PopPair(iovec_t * __restrict iov, char *name, size_t *namlen, 
		void *data, size_t *datlen, int mustfree);
/*
 * iov_FreePairs() - Free pairs/named data in iovec array
 *
 * @iov = iovec array
 * @mustfree = data must be free before delete
 * return: -1 error or 0 ok
 */
int iov_FreePairs(iovec_t * __restrict iov, int mustfree);

/*
 * iov_Debug() - Debug of iovec array
 *
 * @iov = iovec array
 * return: none
 */
void iov_Debug(iovec_t * __restrict iov);


#endif