xdrshort.c

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/*!
   \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;
}