Return to curl_endian.c CVS log

Up to [ELWIX - Embedded LightWeight unIX -] / embedaddon / curl / lib

Annotation of embedaddon/curl/lib/curl_endian.c, revision 1.1.1.1

1.1       misho       1: /***************************************************************************
                      2:  *                                  _   _ ____  _
                      3:  *  Project                     ___| | | |  _ \| |
                      4:  *                             / __| | | | |_) | |
                      5:  *                            | (__| |_| |  _ <| |___
                      6:  *                             \___|\___/|_| \_\_____|
                      7:  *
                      8:  * Copyright (C) 1998 - 2019, 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:  */
                     40: unsigned 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:  */
                     59: unsigned 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:  */
                     78: unsigned 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: 
                     84: #if (CURL_SIZEOF_CURL_OFF_T > 4)
                     85: /*
                     86:  * write32_le()
                     87:  *
                     88:  * This function converts a 32-bit integer from the native endian format,
                     89:  * to little endian format ready for sending down the wire.
                     90:  *
                     91:  * Parameters:
                     92:  *
                     93:  * value    [in]     - The 32-bit integer value.
                     94:  * buffer   [in]     - A pointer to the output buffer.
                     95:  */
                     96: static void write32_le(const int value, unsigned char *buffer)
                     97: {
                     98:   buffer[0] = (char)(value & 0x000000FF);
                     99:   buffer[1] = (char)((value & 0x0000FF00) >> 8);
                    100:   buffer[2] = (char)((value & 0x00FF0000) >> 16);
                    101:   buffer[3] = (char)((value & 0xFF000000) >> 24);
                    102: }
                    103: 
                    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:   write32_le((int)value, buffer);
                    122:   write32_le((int)(value >> 32), buffer + 4);
                    123: }
                    124: #endif /* CURL_SIZEOF_CURL_OFF_T > 4 */