Source code
Revision control
Copy as Markdown
Other Tools
/*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* ``AS IS'' AND ANY 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 THE COPYRIGHT HOLDERS OR CONTRIBUTORS
* 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.
*/
#ifndef RNP_UTILS_H_
#define RNP_UTILS_H_
#include <stdio.h>
#include <limits.h>
#include "logging.h"
/* number of elements in an array */
#define ARRAY_SIZE(a) (sizeof(a) / sizeof(*(a)))
/*
* @params
* array: array of the structures to lookup
* id_field name of the field to compare against
* ret_field filed to return
* lookup_value lookup value
* ret return value
*/
#define ARRAY_LOOKUP_BY_ID(array, id_field, ret_field, lookup_value, ret) \
do { \
for (size_t i__ = 0; i__ < ARRAY_SIZE(array); i__++) { \
if ((array)[i__].id_field == (lookup_value)) { \
(ret) = (array)[i__].ret_field; \
break; \
} \
} \
} while (0)
/* Portable way to convert bits to bytes */
#define BITS_TO_BYTES(b) (((b) + (CHAR_BIT - 1)) / CHAR_BIT)
/* Read big-endian 16-bit value from buf */
inline uint16_t
read_uint16(const uint8_t *buf)
{
return ((uint16_t) buf[0] << 8) | buf[1];
}
/* Read big-endian 32-bit value from buf */
inline uint32_t
read_uint32(const uint8_t *buf)
{
return ((uint32_t) buf[0] << 24) | ((uint32_t) buf[1] << 16) | ((uint32_t) buf[2] << 8) |
(uint32_t) buf[3];
}
/* Store big-endian 16-bit value val in buf */
inline void
write_uint16(uint8_t *buf, uint16_t val)
{
buf[0] = val >> 8;
buf[1] = val & 0xff;
}
/* Store big-endian 32-bit value val in buf */
inline void
write_uint32(uint8_t *buf, uint32_t val)
{
buf[0] = (uint8_t)(val >> 24) & 0xff;
buf[1] = (uint8_t)(val >> 16) & 0xff;
buf[2] = (uint8_t)(val >> 8) & 0xff;
buf[3] = (uint8_t)(val >> 0) & 0xff;
}
inline void
write_uint64(uint8_t *buf, uint64_t val)
{
buf[0] = (uint8_t)(val >> 56) & 0xff;
buf[1] = (uint8_t)(val >> 48) & 0xff;
buf[2] = (uint8_t)(val >> 40) & 0xff;
buf[3] = (uint8_t)(val >> 32) & 0xff;
buf[4] = (uint8_t)(val >> 24) & 0xff;
buf[5] = (uint8_t)(val >> 16) & 0xff;
buf[6] = (uint8_t)(val >> 8) & 0xff;
buf[7] = (uint8_t)(val >> 0) & 0xff;
}
inline char *
getenv_logname(void)
{
char *name = getenv("LOGNAME");
if (!name) {
name = getenv("USER");
}
return name;
}
#endif