utils.h

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/*
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 *
 * utils.h
 * Copyright (C) 2015 Simon Newton
 */

#ifndef FIRMWARE_SRC_UTILS_H_
#define FIRMWARE_SRC_UTILS_H_

#include <stdint.h>

#if HAVE_CONFIG_H
// We're in the test environment
#include <config.h>
#else
#include <machine/endian.h>
#endif

#ifdef HAVE_ARPA_INET_H
#include <arpa/inet.h>
#endif

#ifdef __cplusplus
extern "C" {
#endif

static inline uint8_t ShortLSB(uint16_t s) {
  return s & 0xff;
}

static inline uint8_t ShortMSB(uint16_t s) {
  return s >> 8;
}

static inline uint16_t JoinShort(uint8_t upper, uint8_t lower) {
  return (upper << 8) + lower;
}

static inline uint8_t UInt32Byte0(uint32_t s) {
  return s >> 24;
}

static inline uint8_t UInt32Byte1(uint32_t s) {
  return s >> 16;
}

static inline uint8_t UInt32Byte2(uint32_t s) {
  return s >> 8;
}

static inline uint8_t UInt32Byte3(uint32_t s) {
  return s & 0xff;
}

static inline uint32_t ExtractUInt16(const uint8_t *ptr) {
  return (ptr[0] << 8) + ptr[1];
}

static inline uint32_t ExtractUInt32(const uint8_t *ptr) {
  return (ptr[0] << 24) + (ptr[1] << 16) + (ptr[2] << 8) + ptr[3];
}

static inline uint8_t* PushUInt16(uint8_t *ptr, uint16_t value) {
  *ptr++ = (value >> 8);
  *ptr++ = value & 0xff;
  return ptr;
}

static inline uint8_t* PushUInt32(uint8_t *ptr, uint32_t value) {
  *ptr++ = (value >> 24);
  *ptr++ = (value >> 16);
  *ptr++ = (value >> 8);
  *ptr++ = value & 0xff;
  return ptr;
}

#ifdef __cplusplus
}
#endif

#endif  // FIRMWARE_SRC_UTILS_H_