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util.hpp
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util.hpp
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/* Copyright (c) 2009, Markus Peloquin <[email protected]>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED 'AS IS' AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
* IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
#ifndef FLUKS_UTIL_HPP
#define FLUKS_UTIL_HPP
#include <cstddef>
#include <cstdint>
namespace fluks {
/** XOR two buffers together.
*
* \param[in] a The first operand.
* \param[in] b The second operand.
* \param[in] sz The size of the buffers in bytes.
* \param[out] c The output buffer. It can safely be the same as
* <code>a</code> or <code>b</code>.
*/
inline void xor_bufs(const uint8_t *a, const uint8_t *b, size_t sz,
uint8_t *c);
/** XOR each byte of a buffer with a single byte.
*
* \param[in] a The buffer
* \param[in] sz The size of the input/output buffers
* \param[in] b The byte to XOR with the first buffer
* \param[out] c The output buffer. It can safely be the same as
* <code>a</code>.
*/
inline void xor_buf_byte(const uint8_t *a, size_t sz, uint8_t b,
uint8_t *c);
inline void
xor_bufs(const uint8_t *a, const uint8_t *b, size_t sz, uint8_t *c)
{ while (sz--) *c++ = *a++ ^ *b++; }
inline void
xor_buf_byte(const uint8_t *a, size_t sz, uint8_t b, uint8_t *c)
{ while (sz--) *c++ = *a++ ^ b; }
}
#endif