src/uint16p.c


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40

#include "uint_t.h"

/**
	@file uint16p.c
	@author djb
	@source qmail
	@brief packing/unpacking 16 bit integer to/from char string
*/

void uint16_pack(char s[2],uint16 u) 
{
  s[0] = u & 255;
  s[1] = u >> 8;
}

void uint16_pack_big(char s[2],uint16 u)
{
  s[1] = u & 255;
  s[0] = u >> 8;
}

void uint16_unpack(char s[2],uint16 *u)
{
  uint16 result;

  result =  (unsigned char) s[1]; result <<= 8;
  result += (unsigned char) s[0];

  *u = result;
}

void uint16_unpack_big(char s[2],uint16 *u)
{
  uint16 result;

  result =  (unsigned char) s[0]; result <<= 8;
  result += (unsigned char) s[1];

  *u = result;
}