1/***************************************************************************
2 * _ _ ____ _
3 * Project ___| | | | _ \| |
4 * / __| | | | |_) | |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) 1998 - 2021, Daniel Stenberg, <daniel@haxx.se>, et al.
9 *
10 * This software is licensed as described in the file COPYING, which
11 * you should have received as part of this distribution. The terms
12 * are also available at https://curl.se/docs/copyright.html.
13 *
14 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
15 * copies of the Software, and permit persons to whom the Software is
16 * furnished to do so, under the terms of the COPYING file.
17 *
18 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
19 * KIND, either express or implied.
20 *
21 ***************************************************************************/
22
23#include "curl_setup.h"
24
25#include "curl_endian.h"
26
27/*
28 * Curl_read16_le()
29 *
30 * This function converts a 16-bit integer from the little endian format, as
31 * used in the incoming package to whatever endian format we're using
32 * natively.
33 *
34 * Parameters:
35 *
36 * buf [in] - A pointer to a 2 byte buffer.
37 *
38 * Returns the integer.
39 */
40unsigned short Curl_read16_le(const unsigned char *buf)
41{
42 return (unsigned short)(((unsigned short)buf[0]) |
43 ((unsigned short)buf[1] << 8));
44}
45
46/*
47 * Curl_read32_le()
48 *
49 * This function converts a 32-bit integer from the little endian format, as
50 * used in the incoming package to whatever endian format we're using
51 * natively.
52 *
53 * Parameters:
54 *
55 * buf [in] - A pointer to a 4 byte buffer.
56 *
57 * Returns the integer.
58 */
59unsigned int Curl_read32_le(const unsigned char *buf)
60{
61 return ((unsigned int)buf[0]) | ((unsigned int)buf[1] << 8) |
62 ((unsigned int)buf[2] << 16) | ((unsigned int)buf[3] << 24);
63}
64
65/*
66 * Curl_read16_be()
67 *
68 * This function converts a 16-bit integer from the big endian format, as
69 * used in the incoming package to whatever endian format we're using
70 * natively.
71 *
72 * Parameters:
73 *
74 * buf [in] - A pointer to a 2 byte buffer.
75 *
76 * Returns the integer.
77 */
78unsigned short Curl_read16_be(const unsigned char *buf)
79{
80 return (unsigned short)(((unsigned short)buf[0] << 8) |
81 ((unsigned short)buf[1]));
82}
83