[164] | 1 | /***************************************************************************
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| 2 | * _ _ ____ _
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| 3 | * Project ___| | | | _ \| |
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| 4 | * / __| | | | |_) | |
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| 5 | * | (__| |_| | _ <| |___
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| 6 | * \___|\___/|_| \_\_____|
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| 7 | *
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| 8 | * Copyright (C) 1998 - 2015, Daniel Stenberg, <daniel@haxx.se>, et al.
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| 9 | *
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| 10 | * This software is licensed as described in the file COPYING, which
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| 11 | * you should have received as part of this distribution. The terms
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| 12 | * are also available at https://curl.haxx.se/docs/copyright.html.
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| 13 | *
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| 14 | * You may opt to use, copy, modify, merge, publish, distribute and/or sell
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| 15 | * copies of the Software, and permit persons to whom the Software is
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| 16 | * furnished to do so, under the terms of the COPYING file.
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| 17 | *
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| 18 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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| 19 | * KIND, either express or implied.
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| 20 | *
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| 21 | ***************************************************************************/
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| 22 |
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| 23 | #include "curl_setup.h"
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| 24 |
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| 25 | #include "curl_endian.h"
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| 26 |
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| 27 | /*
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| 28 | * Curl_read16_le()
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| 29 | *
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| 30 | * This function converts a 16-bit integer from the little endian format, as
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| 31 | * used in the incoming package to whatever endian format we're using
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| 32 | * natively.
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| 33 | *
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| 34 | * Parameters:
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| 35 | *
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| 36 | * buf [in] - A pointer to a 2 byte buffer.
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| 37 | *
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| 38 | * Returns the integer.
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| 39 | */
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| 40 | unsigned short Curl_read16_le(unsigned char *buf)
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| 41 | {
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| 42 | return (unsigned short)(((unsigned short)buf[0]) |
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| 43 | ((unsigned short)buf[1] << 8));
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| 44 | }
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| 45 |
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| 46 | /*
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| 47 | * Curl_read32_le()
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| 48 | *
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| 49 | * This function converts a 32-bit integer from the little endian format, as
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| 50 | * used in the incoming package to whatever endian format we're using
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| 51 | * natively.
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| 52 | *
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| 53 | * Parameters:
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| 54 | *
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| 55 | * buf [in] - A pointer to a 4 byte buffer.
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| 56 | *
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| 57 | * Returns the integer.
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| 58 | */
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| 59 | unsigned int Curl_read32_le(unsigned char *buf)
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| 60 | {
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| 61 | return ((unsigned int)buf[0]) | ((unsigned int)buf[1] << 8) |
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| 62 | ((unsigned int)buf[2] << 16) | ((unsigned int)buf[3] << 24);
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| 63 | }
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| 64 |
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| 65 | #if (CURL_SIZEOF_CURL_OFF_T > 4)
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| 66 | /*
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| 67 | * Curl_read64_le()
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| 68 | *
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| 69 | * This function converts a 64-bit integer from the little endian format, as
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| 70 | * used in the incoming package to whatever endian format we're using
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| 71 | * natively.
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| 72 | *
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| 73 | * Parameters:
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| 74 | *
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| 75 | * buf [in] - A pointer to a 8 byte buffer.
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| 76 | *
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| 77 | * Returns the integer.
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| 78 | */
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| 79 | #if defined(HAVE_LONGLONG)
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| 80 | unsigned long long Curl_read64_le(unsigned char *buf)
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| 81 | {
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| 82 | return ((unsigned long long)buf[0]) |
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| 83 | ((unsigned long long)buf[1] << 8) |
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| 84 | ((unsigned long long)buf[2] << 16) |
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| 85 | ((unsigned long long)buf[3] << 24) |
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| 86 | ((unsigned long long)buf[4] << 32) |
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| 87 | ((unsigned long long)buf[5] << 40) |
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| 88 | ((unsigned long long)buf[6] << 48) |
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| 89 | ((unsigned long long)buf[7] << 56);
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| 90 | }
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| 91 | #else
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| 92 | unsigned __int64 Curl_read64_le(unsigned char *buf)
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| 93 | {
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| 94 | return ((unsigned __int64)buf[0]) | ((unsigned __int64)buf[1] << 8) |
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| 95 | ((unsigned __int64)buf[2] << 16) | ((unsigned __int64)buf[3] << 24) |
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| 96 | ((unsigned __int64)buf[4] << 32) | ((unsigned __int64)buf[5] << 40) |
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| 97 | ((unsigned __int64)buf[6] << 48) | ((unsigned __int64)buf[7] << 56);
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| 98 | }
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| 99 | #endif
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| 100 |
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| 101 | #endif /* CURL_SIZEOF_CURL_OFF_T > 4 */
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| 102 |
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| 103 | /*
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| 104 | * Curl_read16_be()
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| 105 | *
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| 106 | * This function converts a 16-bit integer from the big endian format, as
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| 107 | * used in the incoming package to whatever endian format we're using
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| 108 | * natively.
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| 109 | *
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| 110 | * Parameters:
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| 111 | *
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| 112 | * buf [in] - A pointer to a 2 byte buffer.
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| 113 | *
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| 114 | * Returns the integer.
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| 115 | */
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| 116 | unsigned short Curl_read16_be(unsigned char *buf)
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| 117 | {
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| 118 | return (unsigned short)(((unsigned short)buf[0] << 8) |
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| 119 | ((unsigned short)buf[1]));
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| 120 | }
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| 121 |
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| 122 | /*
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| 123 | * Curl_read32_be()
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| 124 | *
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| 125 | * This function converts a 32-bit integer from the big endian format, as
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| 126 | * used in the incoming package to whatever endian format we're using
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| 127 | * natively.
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| 128 | *
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| 129 | * Parameters:
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| 130 | *
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| 131 | * buf [in] - A pointer to a 4 byte buffer.
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| 132 | *
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| 133 | * Returns the integer.
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| 134 | */
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| 135 | unsigned int Curl_read32_be(unsigned char *buf)
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| 136 | {
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| 137 | return ((unsigned int)buf[0] << 24) | ((unsigned int)buf[1] << 16) |
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| 138 | ((unsigned int)buf[2] << 8) | ((unsigned int)buf[3]);
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| 139 | }
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| 140 |
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| 141 | #if (CURL_SIZEOF_CURL_OFF_T > 4)
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| 142 | /*
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| 143 | * Curl_read64_be()
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| 144 | *
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| 145 | * This function converts a 64-bit integer from the big endian format, as
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| 146 | * used in the incoming package to whatever endian format we're using
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| 147 | * natively.
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| 148 | *
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| 149 | * Parameters:
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| 150 | *
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| 151 | * buf [in] - A pointer to a 8 byte buffer.
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| 152 | *
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| 153 | * Returns the integer.
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| 154 | */
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| 155 | #if defined(HAVE_LONGLONG)
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| 156 | unsigned long long Curl_read64_be(unsigned char *buf)
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| 157 | {
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| 158 | return ((unsigned long long)buf[0] << 56) |
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| 159 | ((unsigned long long)buf[1] << 48) |
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| 160 | ((unsigned long long)buf[2] << 40) |
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| 161 | ((unsigned long long)buf[3] << 32) |
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| 162 | ((unsigned long long)buf[4] << 24) |
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| 163 | ((unsigned long long)buf[5] << 16) |
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| 164 | ((unsigned long long)buf[6] << 8) |
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| 165 | ((unsigned long long)buf[7]);
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| 166 | }
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| 167 | #else
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| 168 | unsigned __int64 Curl_read64_be(unsigned char *buf)
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| 169 | {
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| 170 | return ((unsigned __int64)buf[0] << 56) | ((unsigned __int64)buf[1] << 48) |
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| 171 | ((unsigned __int64)buf[2] << 40) | ((unsigned __int64)buf[3] << 32) |
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| 172 | ((unsigned __int64)buf[4] << 24) | ((unsigned __int64)buf[5] << 16) |
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| 173 | ((unsigned __int64)buf[6] << 8) | ((unsigned __int64)buf[7]);
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| 174 | }
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| 175 | #endif
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| 176 |
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| 177 | #endif /* CURL_SIZEOF_CURL_OFF_T > 4 */
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| 178 |
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| 179 | /*
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| 180 | * Curl_write16_le()
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| 181 | *
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| 182 | * This function converts a 16-bit integer from the native endian format,
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| 183 | * to little endian format ready for sending down the wire.
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| 184 | *
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| 185 | * Parameters:
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| 186 | *
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| 187 | * value [in] - The 16-bit integer value.
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| 188 | * buffer [in] - A pointer to the output buffer.
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| 189 | */
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| 190 | void Curl_write16_le(const short value, unsigned char *buffer)
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| 191 | {
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| 192 | buffer[0] = (char)(value & 0x00FF);
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| 193 | buffer[1] = (char)((value & 0xFF00) >> 8);
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| 194 | }
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| 195 |
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| 196 | /*
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| 197 | * Curl_write32_le()
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| 198 | *
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| 199 | * This function converts a 32-bit integer from the native endian format,
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| 200 | * to little endian format ready for sending down the wire.
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| 201 | *
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| 202 | * Parameters:
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| 203 | *
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| 204 | * value [in] - The 32-bit integer value.
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| 205 | * buffer [in] - A pointer to the output buffer.
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| 206 | */
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| 207 | void Curl_write32_le(const int value, unsigned char *buffer)
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| 208 | {
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| 209 | buffer[0] = (char)(value & 0x000000FF);
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| 210 | buffer[1] = (char)((value & 0x0000FF00) >> 8);
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| 211 | buffer[2] = (char)((value & 0x00FF0000) >> 16);
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| 212 | buffer[3] = (char)((value & 0xFF000000) >> 24);
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| 213 | }
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| 214 |
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| 215 | #if (CURL_SIZEOF_CURL_OFF_T > 4)
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| 216 | /*
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| 217 | * Curl_write64_le()
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| 218 | *
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| 219 | * This function converts a 64-bit integer from the native endian format,
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| 220 | * to little endian format ready for sending down the wire.
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| 221 | *
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| 222 | * Parameters:
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| 223 | *
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| 224 | * value [in] - The 64-bit integer value.
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| 225 | * buffer [in] - A pointer to the output buffer.
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| 226 | */
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| 227 | #if defined(HAVE_LONGLONG)
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| 228 | void Curl_write64_le(const long long value, unsigned char *buffer)
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| 229 | #else
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| 230 | void Curl_write64_le(const __int64 value, unsigned char *buffer)
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| 231 | #endif
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| 232 | {
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| 233 | Curl_write32_le((int)value, buffer);
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| 234 | Curl_write32_le((int)(value >> 32), buffer + 4);
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| 235 | }
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| 236 | #endif /* CURL_SIZEOF_CURL_OFF_T > 4 */
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