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endian: Added standard function descriptions

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This commit is contained in:
Steve Holme 2014-12-31 11:59:39 +00:00
parent f4413ca65a
commit e86a6151f4
2 changed files with 49 additions and 6 deletions
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50
lib/endian.c
View File

@ -25,9 +25,17 @@
#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.
* Curl_read16_le()
*
* This function converts a 16-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 2 byte buffer.
*
* Returns the integer.
*/
unsigned short Curl_read16_le(unsigned char *buf)
{
@ -36,9 +44,17 @@ unsigned short Curl_read16_le(unsigned char *buf)
}
/*
* 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.
* Curl_read32_le()
*
* This function converts a 32-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 4 byte buffer.
*
* Returns the integer.
*/
unsigned int Curl_read32_le(unsigned char *buf)
{
@ -46,6 +62,17 @@ unsigned int Curl_read32_le(unsigned char *buf)
((unsigned int)buf[2] << 16) | ((unsigned int)buf[3] << 24);
}
/*
* Curl_write32_le()
*
* This function converts a 32-bit integer from the native endian format,
* to little endian format ready for sending down the wire.
*
* Parameters:
*
* value [in] - The 32-bit integer value.
* buffer [in] - A pointer to the output buffer.
*/
void Curl_write32_le(const int value, unsigned char *buffer)
{
buffer[0] = (char)(value & 0x000000FF);
@ -55,6 +82,17 @@ void Curl_write32_le(const int value, unsigned char *buffer)
}
#if (CURL_SIZEOF_CURL_OFF_T > 4)
/*
* Curl_write64_le()
*
* This function converts a 64-bit integer from the native endian format,
* to little endian format ready for sending down the wire.
*
* Parameters:
*
* value [in] - The 64-bit integer value.
* buffer [in] - A pointer to the output buffer.
*/
#if defined(HAVE_LONGLONG)
void Curl_write64_le(const long long value, unsigned char *buffer)
#else

5
lib/endian.h
View File

@ -22,12 +22,17 @@
*
***************************************************************************/
/* Converts a 16-bit integer from little endian */
unsigned short Curl_read16_le(unsigned char *buf);
/* Converts a 32-bit integer from little endian */
unsigned int Curl_read32_le(unsigned char *buf);
/* Converts a 32-bit integer to little endian */
void Curl_write32_le(const int value, unsigned char *buffer);
#if (CURL_SIZEOF_CURL_OFF_T > 4)
/* Converts a 64-bit integer to little endian */
#if defined(HAVE_LONGLONG)
void Curl_write64_le(const long long value, unsigned char *buffer);
#else