/*-GNU-GPL-BEGIN-*
nepim - network pipemeter
Copyright (C) 2005 Everton da Silva Marques

nepim is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.

nepim 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 General Public License for more details.

You should have received a copy of the GNU General Public License
along with nepim; see the file COPYING.  If not, write to
the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
*-GNU-GPL-END-*/


/* $Id: int.c,v 1.2 2005/08/11 17:55:54 evertonm Exp $ */


#include <assert.h>

#include "int.h"


void nepim_int_sanity()
{
  assert(sizeof(uint8_t)  == 1);
  assert(sizeof(uint16_t) == 2);
  assert(sizeof(uint32_t) == 4);
}

uint16_t nepim_uint16_read(const char *buf)
{
  uint16_t value;

  value = ((const uint8_t *) buf)[0];
  value *= 256;
  value += ((const uint8_t *) buf)[1];

  return value;
}

uint32_t nepim_uint32_read(const char *buf)
{
  uint32_t value;

  value = ((const uint8_t *) buf)[0];
  value *= 256;
  value += ((const uint8_t *) buf)[1];
  value *= 256;
  value += ((const uint8_t *) buf)[2];
  value *= 256;
  value += ((const uint8_t *) buf)[3];

  return value;
}

void nepim_uint16_write(char *buf, uint16_t value)
{
  ((uint8_t *) buf)[0] = value / 256;
  ((uint8_t *) buf)[1] = value % 256;
}

void nepim_uint32_write(char *buf, uint32_t value)
{
  int i;

  for (i = 3; i >= 0; --i, value /= 256)
    ((uint8_t *) buf)[i] = value % 256;
}