Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame] | 1 | /*************************************************************************** |
| 2 | * _ _ ____ _ |
| 3 | * Project ___| | | | _ \| | |
| 4 | * / __| | | | |_) | | |
| 5 | * | (__| |_| | _ <| |___ |
| 6 | * \___|\___/|_| \_\_____| |
| 7 | * |
Elliott Hughes | 82be86d | 2017-09-20 17:00:17 -0700 | [diff] [blame] | 8 | * Copyright (C) 1998 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al. |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame] | 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 |
Alex Deymo | 8f1a214 | 2016-06-28 14:49:26 -0700 | [diff] [blame] | 12 | * are also available at https://curl.haxx.se/docs/copyright.html. |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame] | 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 | */ |
Elliott Hughes | cee0338 | 2017-06-23 12:17:18 -0700 | [diff] [blame] | 40 | unsigned short Curl_read16_le(const unsigned char *buf) |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame] | 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 | */ |
Elliott Hughes | cee0338 | 2017-06-23 12:17:18 -0700 | [diff] [blame] | 59 | unsigned int Curl_read32_le(const unsigned char *buf) |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame] | 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 | |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame] | 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 | */ |
Elliott Hughes | cee0338 | 2017-06-23 12:17:18 -0700 | [diff] [blame] | 78 | unsigned short Curl_read16_be(const unsigned char *buf) |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame] | 79 | { |
| 80 | return (unsigned short)(((unsigned short)buf[0] << 8) | |
| 81 | ((unsigned short)buf[1])); |
| 82 | } |
| 83 | |
| 84 | /* |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame] | 85 | * Curl_write32_le() |
| 86 | * |
| 87 | * This function converts a 32-bit integer from the native endian format, |
| 88 | * to little endian format ready for sending down the wire. |
| 89 | * |
| 90 | * Parameters: |
| 91 | * |
| 92 | * value [in] - The 32-bit integer value. |
| 93 | * buffer [in] - A pointer to the output buffer. |
| 94 | */ |
| 95 | void Curl_write32_le(const int value, unsigned char *buffer) |
| 96 | { |
| 97 | buffer[0] = (char)(value & 0x000000FF); |
| 98 | buffer[1] = (char)((value & 0x0000FF00) >> 8); |
| 99 | buffer[2] = (char)((value & 0x00FF0000) >> 16); |
| 100 | buffer[3] = (char)((value & 0xFF000000) >> 24); |
| 101 | } |
| 102 | |
| 103 | #if (CURL_SIZEOF_CURL_OFF_T > 4) |
| 104 | /* |
| 105 | * Curl_write64_le() |
| 106 | * |
| 107 | * This function converts a 64-bit integer from the native endian format, |
| 108 | * to little endian format ready for sending down the wire. |
| 109 | * |
| 110 | * Parameters: |
| 111 | * |
| 112 | * value [in] - The 64-bit integer value. |
| 113 | * buffer [in] - A pointer to the output buffer. |
| 114 | */ |
| 115 | #if defined(HAVE_LONGLONG) |
| 116 | void Curl_write64_le(const long long value, unsigned char *buffer) |
| 117 | #else |
| 118 | void Curl_write64_le(const __int64 value, unsigned char *buffer) |
| 119 | #endif |
| 120 | { |
| 121 | Curl_write32_le((int)value, buffer); |
| 122 | Curl_write32_le((int)(value >> 32), buffer + 4); |
| 123 | } |
| 124 | #endif /* CURL_SIZEOF_CURL_OFF_T > 4 */ |