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curl/lib/endian.c
2014-12-31 12:16:58 +00:00

68 lines
2.3 KiB
C

/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2014, Daniel Stenberg, <daniel@haxx.se>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at http://curl.haxx.se/docs/copyright.html.
*
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
* copies of the Software, and permit persons to whom the Software is
* furnished to do so, under the terms of the COPYING file.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
***************************************************************************/
#include "curl_setup.h"
#include "endian.h"
/*
* This function converts from the little endian format used in the incoming
* package to whatever endian format we're using natively. Argument is a
* pointer to a 2 byte buffer.
*/
unsigned short readshort_le(unsigned char *buf)
{
return (unsigned short)(((unsigned short)buf[0]) |
((unsigned short)buf[1] << 8));
}
/*
* This function converts from the little endian format used in the
* incoming package to whatever endian format we're using natively.
* Argument is a pointer to a 4 byte buffer.
*/
unsigned int readint_le(unsigned char *buf)
{
return ((unsigned int)buf[0]) | ((unsigned int)buf[1] << 8) |
((unsigned int)buf[2] << 16) | ((unsigned int)buf[3] << 24);
}
void write32_le(const int value, unsigned char *buffer)
{
buffer[0] = (char)(value & 0x000000FF);
buffer[1] = (char)((value & 0x0000FF00) >> 8);
buffer[2] = (char)((value & 0x00FF0000) >> 16);
buffer[3] = (char)((value & 0xFF000000) >> 24);
}
#if (CURL_SIZEOF_CURL_OFF_T > 4)
#if defined(HAVE_LONGLONG)
void write64_le(const long long value, unsigned char *buffer)
#else
void write64_le(const __int64 value, unsigned char *buffer)
#endif
{
write32_le((int)value, buffer);
write32_le((int)(value >> 32), buffer + 4);
}
#endif