source: UsbWattMeter/trunk/curl-7.47.1/lib/curl_endian.c@ 164

Last change on this file since 164 was 164, checked in by coas-nagasima, 6 years ago

TOPPERS/ECNLサンプルアプリ「USB充電器電力計」を追加

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  • Property svn:mime-type set to text/x-csrc
File size: 6.8 KB
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1/***************************************************************************
2 * _ _ ____ _
3 * Project ___| | | | _ \| |
4 * / __| | | | |_) | |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) 1998 - 2015, 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.haxx.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(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(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#if (CURL_SIZEOF_CURL_OFF_T > 4)
66/*
67 * Curl_read64_le()
68 *
69 * This function converts a 64-bit integer from the little endian format, as
70 * used in the incoming package to whatever endian format we're using
71 * natively.
72 *
73 * Parameters:
74 *
75 * buf [in] - A pointer to a 8 byte buffer.
76 *
77 * Returns the integer.
78 */
79#if defined(HAVE_LONGLONG)
80unsigned long long Curl_read64_le(unsigned char *buf)
81{
82 return ((unsigned long long)buf[0]) |
83 ((unsigned long long)buf[1] << 8) |
84 ((unsigned long long)buf[2] << 16) |
85 ((unsigned long long)buf[3] << 24) |
86 ((unsigned long long)buf[4] << 32) |
87 ((unsigned long long)buf[5] << 40) |
88 ((unsigned long long)buf[6] << 48) |
89 ((unsigned long long)buf[7] << 56);
90}
91#else
92unsigned __int64 Curl_read64_le(unsigned char *buf)
93{
94 return ((unsigned __int64)buf[0]) | ((unsigned __int64)buf[1] << 8) |
95 ((unsigned __int64)buf[2] << 16) | ((unsigned __int64)buf[3] << 24) |
96 ((unsigned __int64)buf[4] << 32) | ((unsigned __int64)buf[5] << 40) |
97 ((unsigned __int64)buf[6] << 48) | ((unsigned __int64)buf[7] << 56);
98}
99#endif
100
101#endif /* CURL_SIZEOF_CURL_OFF_T > 4 */
102
103/*
104 * Curl_read16_be()
105 *
106 * This function converts a 16-bit integer from the big endian format, as
107 * used in the incoming package to whatever endian format we're using
108 * natively.
109 *
110 * Parameters:
111 *
112 * buf [in] - A pointer to a 2 byte buffer.
113 *
114 * Returns the integer.
115 */
116unsigned short Curl_read16_be(unsigned char *buf)
117{
118 return (unsigned short)(((unsigned short)buf[0] << 8) |
119 ((unsigned short)buf[1]));
120}
121
122/*
123 * Curl_read32_be()
124 *
125 * This function converts a 32-bit integer from the big endian format, as
126 * used in the incoming package to whatever endian format we're using
127 * natively.
128 *
129 * Parameters:
130 *
131 * buf [in] - A pointer to a 4 byte buffer.
132 *
133 * Returns the integer.
134 */
135unsigned int Curl_read32_be(unsigned char *buf)
136{
137 return ((unsigned int)buf[0] << 24) | ((unsigned int)buf[1] << 16) |
138 ((unsigned int)buf[2] << 8) | ((unsigned int)buf[3]);
139}
140
141#if (CURL_SIZEOF_CURL_OFF_T > 4)
142/*
143 * Curl_read64_be()
144 *
145 * This function converts a 64-bit integer from the big endian format, as
146 * used in the incoming package to whatever endian format we're using
147 * natively.
148 *
149 * Parameters:
150 *
151 * buf [in] - A pointer to a 8 byte buffer.
152 *
153 * Returns the integer.
154 */
155#if defined(HAVE_LONGLONG)
156unsigned long long Curl_read64_be(unsigned char *buf)
157{
158 return ((unsigned long long)buf[0] << 56) |
159 ((unsigned long long)buf[1] << 48) |
160 ((unsigned long long)buf[2] << 40) |
161 ((unsigned long long)buf[3] << 32) |
162 ((unsigned long long)buf[4] << 24) |
163 ((unsigned long long)buf[5] << 16) |
164 ((unsigned long long)buf[6] << 8) |
165 ((unsigned long long)buf[7]);
166}
167#else
168unsigned __int64 Curl_read64_be(unsigned char *buf)
169{
170 return ((unsigned __int64)buf[0] << 56) | ((unsigned __int64)buf[1] << 48) |
171 ((unsigned __int64)buf[2] << 40) | ((unsigned __int64)buf[3] << 32) |
172 ((unsigned __int64)buf[4] << 24) | ((unsigned __int64)buf[5] << 16) |
173 ((unsigned __int64)buf[6] << 8) | ((unsigned __int64)buf[7]);
174}
175#endif
176
177#endif /* CURL_SIZEOF_CURL_OFF_T > 4 */
178
179/*
180 * Curl_write16_le()
181 *
182 * This function converts a 16-bit integer from the native endian format,
183 * to little endian format ready for sending down the wire.
184 *
185 * Parameters:
186 *
187 * value [in] - The 16-bit integer value.
188 * buffer [in] - A pointer to the output buffer.
189 */
190void Curl_write16_le(const short value, unsigned char *buffer)
191{
192 buffer[0] = (char)(value & 0x00FF);
193 buffer[1] = (char)((value & 0xFF00) >> 8);
194}
195
196/*
197 * Curl_write32_le()
198 *
199 * This function converts a 32-bit integer from the native endian format,
200 * to little endian format ready for sending down the wire.
201 *
202 * Parameters:
203 *
204 * value [in] - The 32-bit integer value.
205 * buffer [in] - A pointer to the output buffer.
206 */
207void Curl_write32_le(const int value, unsigned char *buffer)
208{
209 buffer[0] = (char)(value & 0x000000FF);
210 buffer[1] = (char)((value & 0x0000FF00) >> 8);
211 buffer[2] = (char)((value & 0x00FF0000) >> 16);
212 buffer[3] = (char)((value & 0xFF000000) >> 24);
213}
214
215#if (CURL_SIZEOF_CURL_OFF_T > 4)
216/*
217 * Curl_write64_le()
218 *
219 * This function converts a 64-bit integer from the native endian format,
220 * to little endian format ready for sending down the wire.
221 *
222 * Parameters:
223 *
224 * value [in] - The 64-bit integer value.
225 * buffer [in] - A pointer to the output buffer.
226 */
227#if defined(HAVE_LONGLONG)
228void Curl_write64_le(const long long value, unsigned char *buffer)
229#else
230void Curl_write64_le(const __int64 value, unsigned char *buffer)
231#endif
232{
233 Curl_write32_le((int)value, buffer);
234 Curl_write32_le((int)(value >> 32), buffer + 4);
235}
236#endif /* CURL_SIZEOF_CURL_OFF_T > 4 */
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