utils.h File Reference

Various handy functions. More...

#include <stdint.h>

Go to the source code of this file.

Functions
uint16_t	utils_read16_le (const uint8_t *buf)
	Reads data as little-endian half-word. More...
uint32_t	utils_read32_le (const uint8_t *buf)
	Reads data as little-endian word. More...
uint32_t	utils_read32_be (const uint8_t *buf)
	Reads data as big-endian word. More...
void	utils_write16_le (uint8_t *buf, uint16_t v)
	Writes data as little-endian half-word. More...
void	utils_write32_le (uint8_t *buf, uint32_t v)
	Writes data as little-endian word. More...
void	utils_write32_be (uint8_t *buf, uint32_t v)
	Writes data as big-endian word. More...
void	utils_memcpy_r (uint8_t *dst, const uint8_t *src, uint16_t size)
	Copies a memory area in reverse order. More...

Detailed Description

Various handy functions.

Copyright (c) 2018, Archos S.A. All rights reserved.

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• Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS'' AND AND EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL ARCHOS S.A. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

Function Documentation

void utils_memcpy_r	(	uint8_t *	dst,
		const uint8_t *	src,
		uint16_t	size
	)

Copies a memory area in reverse order.

The function copies a memory area in reverse order (last byte of the source area copied to the first byte of the destination area).

Parameters

dst	destination pointer.
src	source pointer.
size	size of the memory area to copy.

uint16_t utils_read16_le

(

const uint8_t *

buf

)

Reads data as little-endian half-word.

Parameters

buf	pointer to the data to read.

Return values

uint16_t

read half-word.

uint32_t utils_read32_be

(

const uint8_t *

buf

)

Reads data as big-endian word.

Parameters

buf	pointer to the data to read.

Return values

uint32_t

read word.

uint32_t utils_read32_le

(

const uint8_t *

buf

)

Reads data as little-endian word.

Parameters

buf	pointer to the data to read.

Return values

uint32_t

read word.

void utils_write16_le	(	uint8_t *	buf,
		uint16_t	v
	)

Writes data as little-endian half-word.

Parameters

buf	pointer to the memory area where the data will be written.
v	half-word to write.

void utils_write32_be	(	uint8_t *	buf,
		uint32_t	v
	)

Writes data as big-endian word.

Parameters

buf	pointer to the memory area where the data will be written.
v	word to write.

void utils_write32_le	(	uint8_t *	buf,
		uint32_t	v
	)

Writes data as little-endian word.

Parameters

buf	pointer to the memory area where the data will be written.
v	word to write.