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endian: Added 64-bit integer read function

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This commit is contained in:
Steve Holme 2015-01-01 20:09:50 +00:00
parent 5fbcb9a1fa
commit 43792592ca
2 changed files with 46 additions and 2 deletions
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37
lib/curl_endian.c
View File

@ -5,7 +5,7 @@
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2014, Daniel Stenberg, <daniel@haxx.se>, et al.
* Copyright (C) 1998 - 2015, 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
@ -62,6 +62,41 @@ unsigned int Curl_read32_le(unsigned char *buf)
((unsigned int)buf[2] << 16) | ((unsigned int)buf[3] << 24);
}
/*
* Curl_read64_le()
*
* This function converts a 64-bit integer from the little endian format, as
* used in the incoming package to whatever endian format we're using
* natively.
*
* Parameters:
*
* buf [in] - A pointer to a 8 byte buffer.
*
* Returns the integer.
*/
#if defined(HAVE_LONGLONG)
unsigned long long Curl_read64_le(unsigned char *buf)
{
return ((unsigned long long)buf[0]) |
((unsigned long long)buf[1] << 8) |
((unsigned long long)buf[2] << 16) |
((unsigned long long)buf[3] << 24) |
((unsigned long long)buf[4] << 32) |
((unsigned long long)buf[5] << 40) |
((unsigned long long)buf[6] << 48) |
((unsigned long long)buf[7] << 54);
}
#else
unsigned __int64 Curl_read64_le(unsigned char *buf)
{
return ((unsigned __int64)buf[0]) | ((unsigned __int64)buf[1] << 8) |
((unsigned __int64)buf[2] << 16) | ((unsigned __int64)buf[3] << 24) |
((unsigned __int64)buf[4] << 32) | ((unsigned __int64)buf[5] << 40) |
((unsigned __int64)buf[6] << 48) | ((unsigned __int64)buf[7] << 54);
}
#endif
/*
* Curl_write16_le()
*

11
lib/curl_endian.h
View File

@ -7,7 +7,7 @@
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2014, Daniel Stenberg, <daniel@haxx.se>, et al.
* Copyright (C) 1998 - 2015, 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
@ -28,6 +28,15 @@ unsigned short Curl_read16_le(unsigned char *buf);
/* Converts a 32-bit integer from little endian */
unsigned int Curl_read32_le(unsigned char *buf);
#if (CURL_SIZEOF_CURL_OFF_T > 4)
/* Converts a 64-bit integer from little endian */
#if defined(HAVE_LONGLONG)
unsigned long long Curl_read64_le(unsigned char *buf);
#else
unsigned __int64 Curl_read64_le(unsigned char *buf);
#endif
#endif
/* Converts a 16-bit integer to little endian */
void Curl_write16_le(const short value, unsigned char *buffer);