Geografic-Information-System/lib/db/dbmi_base/xdrshort.c

/*!
  \file lib/db/dbmi_base/xdrshort.c
  
  \brief DBMI Library (base) - external data representation (short)
  
  (C) 1999-2009, 2011 by the GRASS Development Team
  
  This program is free software under the GNU General Public License
  (>=v2). Read the file COPYING that comes with GRASS for details.
  
  \author Joel Jones (CERL/UIUC), Radim Blazek, Brad Douglas, Markus Neteler
  \author Doxygenized by Martin Landa <landa.martin gmail.com> (2011)
*/

#include <stdlib.h>
#include "xdr.h"

/*!
  \brief Send short

  \param n

  \return
*/
int db__send_short(int n)
{
    int stat = DB_OK;
    short h = (short)n;

    if (!db__send(&h, sizeof(h)))
	stat = DB_PROTOCOL_ERR;

    if (stat == DB_PROTOCOL_ERR)
	db_protocol_error();

    return stat;
}

/*!
  \brief Receive short

  \param n

  \return
*/
int db__recv_short(short *n)
{
    int stat = DB_OK;

    if (!db__recv(n, sizeof(*n)))
	stat = DB_PROTOCOL_ERR;

    if (stat == DB_PROTOCOL_ERR)
	db_protocol_error();

    return stat;
}

/*!
  \brief Send short array

  \param x
  \param n

  \return
*/
int db__send_short_array(const short *x, int n)
{
    int stat = DB_OK;

    if (!db__send(&n, sizeof(n)))
	stat = DB_PROTOCOL_ERR;

    if (!db__send(x, n * sizeof(*x)))
	stat = DB_PROTOCOL_ERR;

    if (stat == DB_PROTOCOL_ERR)
	db_protocol_error();

    return stat;
}

/*!
  \brief Receive short array

  Returns an allocated array of ints
  Caller is responsible for free()

  \param x
  \param n

  \return
*/
int db__recv_short_array(short **x, int *n)
{
    int stat = DB_OK;
    int count = 0;
    short *a = NULL;

    if (!db__recv(&count, sizeof(count)))
	stat = DB_PROTOCOL_ERR;

    *n = count;

    *x = a = (short *)db_calloc(count, sizeof(*a));

    if (!db__recv(a, count * sizeof(*a)))
	stat = DB_PROTOCOL_ERR;

    if (stat == DB_PROTOCOL_ERR)
	db_protocol_error();

    return stat;
}