xref: /aosp_15_r20/external/curl/lib/curl_endian.c (revision 6236dae45794135f37c4eb022389c904c8b0090d)
1*6236dae4SAndroid Build Coastguard Worker /***************************************************************************
2*6236dae4SAndroid Build Coastguard Worker  *                                  _   _ ____  _
3*6236dae4SAndroid Build Coastguard Worker  *  Project                     ___| | | |  _ \| |
4*6236dae4SAndroid Build Coastguard Worker  *                             / __| | | | |_) | |
5*6236dae4SAndroid Build Coastguard Worker  *                            | (__| |_| |  _ <| |___
6*6236dae4SAndroid Build Coastguard Worker  *                             \___|\___/|_| \_\_____|
7*6236dae4SAndroid Build Coastguard Worker  *
8*6236dae4SAndroid Build Coastguard Worker  * Copyright (C) Daniel Stenberg, <[email protected]>, et al.
9*6236dae4SAndroid Build Coastguard Worker  *
10*6236dae4SAndroid Build Coastguard Worker  * This software is licensed as described in the file COPYING, which
11*6236dae4SAndroid Build Coastguard Worker  * you should have received as part of this distribution. The terms
12*6236dae4SAndroid Build Coastguard Worker  * are also available at https://curl.se/docs/copyright.html.
13*6236dae4SAndroid Build Coastguard Worker  *
14*6236dae4SAndroid Build Coastguard Worker  * You may opt to use, copy, modify, merge, publish, distribute and/or sell
15*6236dae4SAndroid Build Coastguard Worker  * copies of the Software, and permit persons to whom the Software is
16*6236dae4SAndroid Build Coastguard Worker  * furnished to do so, under the terms of the COPYING file.
17*6236dae4SAndroid Build Coastguard Worker  *
18*6236dae4SAndroid Build Coastguard Worker  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
19*6236dae4SAndroid Build Coastguard Worker  * KIND, either express or implied.
20*6236dae4SAndroid Build Coastguard Worker  *
21*6236dae4SAndroid Build Coastguard Worker  * SPDX-License-Identifier: curl
22*6236dae4SAndroid Build Coastguard Worker  *
23*6236dae4SAndroid Build Coastguard Worker  ***************************************************************************/
24*6236dae4SAndroid Build Coastguard Worker 
25*6236dae4SAndroid Build Coastguard Worker #include "curl_setup.h"
26*6236dae4SAndroid Build Coastguard Worker 
27*6236dae4SAndroid Build Coastguard Worker #include "curl_endian.h"
28*6236dae4SAndroid Build Coastguard Worker 
29*6236dae4SAndroid Build Coastguard Worker /*
30*6236dae4SAndroid Build Coastguard Worker  * Curl_read16_le()
31*6236dae4SAndroid Build Coastguard Worker  *
32*6236dae4SAndroid Build Coastguard Worker  * This function converts a 16-bit integer from the little endian format, as
33*6236dae4SAndroid Build Coastguard Worker  * used in the incoming package to whatever endian format we are using
34*6236dae4SAndroid Build Coastguard Worker  * natively.
35*6236dae4SAndroid Build Coastguard Worker  *
36*6236dae4SAndroid Build Coastguard Worker  * Parameters:
37*6236dae4SAndroid Build Coastguard Worker  *
38*6236dae4SAndroid Build Coastguard Worker  * buf      [in]     - A pointer to a 2 byte buffer.
39*6236dae4SAndroid Build Coastguard Worker  *
40*6236dae4SAndroid Build Coastguard Worker  * Returns the integer.
41*6236dae4SAndroid Build Coastguard Worker  */
Curl_read16_le(const unsigned char * buf)42*6236dae4SAndroid Build Coastguard Worker unsigned short Curl_read16_le(const unsigned char *buf)
43*6236dae4SAndroid Build Coastguard Worker {
44*6236dae4SAndroid Build Coastguard Worker   return (unsigned short)(((unsigned short)buf[0]) |
45*6236dae4SAndroid Build Coastguard Worker                           ((unsigned short)buf[1] << 8));
46*6236dae4SAndroid Build Coastguard Worker }
47*6236dae4SAndroid Build Coastguard Worker 
48*6236dae4SAndroid Build Coastguard Worker /*
49*6236dae4SAndroid Build Coastguard Worker  * Curl_read32_le()
50*6236dae4SAndroid Build Coastguard Worker  *
51*6236dae4SAndroid Build Coastguard Worker  * This function converts a 32-bit integer from the little endian format, as
52*6236dae4SAndroid Build Coastguard Worker  * used in the incoming package to whatever endian format we are using
53*6236dae4SAndroid Build Coastguard Worker  * natively.
54*6236dae4SAndroid Build Coastguard Worker  *
55*6236dae4SAndroid Build Coastguard Worker  * Parameters:
56*6236dae4SAndroid Build Coastguard Worker  *
57*6236dae4SAndroid Build Coastguard Worker  * buf      [in]     - A pointer to a 4 byte buffer.
58*6236dae4SAndroid Build Coastguard Worker  *
59*6236dae4SAndroid Build Coastguard Worker  * Returns the integer.
60*6236dae4SAndroid Build Coastguard Worker  */
Curl_read32_le(const unsigned char * buf)61*6236dae4SAndroid Build Coastguard Worker unsigned int Curl_read32_le(const unsigned char *buf)
62*6236dae4SAndroid Build Coastguard Worker {
63*6236dae4SAndroid Build Coastguard Worker   return ((unsigned int)buf[0]) | ((unsigned int)buf[1] << 8) |
64*6236dae4SAndroid Build Coastguard Worker          ((unsigned int)buf[2] << 16) | ((unsigned int)buf[3] << 24);
65*6236dae4SAndroid Build Coastguard Worker }
66*6236dae4SAndroid Build Coastguard Worker 
67*6236dae4SAndroid Build Coastguard Worker /*
68*6236dae4SAndroid Build Coastguard Worker  * Curl_read16_be()
69*6236dae4SAndroid Build Coastguard Worker  *
70*6236dae4SAndroid Build Coastguard Worker  * This function converts a 16-bit integer from the big endian format, as
71*6236dae4SAndroid Build Coastguard Worker  * used in the incoming package to whatever endian format we are using
72*6236dae4SAndroid Build Coastguard Worker  * natively.
73*6236dae4SAndroid Build Coastguard Worker  *
74*6236dae4SAndroid Build Coastguard Worker  * Parameters:
75*6236dae4SAndroid Build Coastguard Worker  *
76*6236dae4SAndroid Build Coastguard Worker  * buf      [in]     - A pointer to a 2 byte buffer.
77*6236dae4SAndroid Build Coastguard Worker  *
78*6236dae4SAndroid Build Coastguard Worker  * Returns the integer.
79*6236dae4SAndroid Build Coastguard Worker  */
Curl_read16_be(const unsigned char * buf)80*6236dae4SAndroid Build Coastguard Worker unsigned short Curl_read16_be(const unsigned char *buf)
81*6236dae4SAndroid Build Coastguard Worker {
82*6236dae4SAndroid Build Coastguard Worker   return (unsigned short)(((unsigned short)buf[0] << 8) |
83*6236dae4SAndroid Build Coastguard Worker                           ((unsigned short)buf[1]));
84*6236dae4SAndroid Build Coastguard Worker }
85