/* Copyright 2013 Google Inc. All Rights Reserved.

   Distributed under MIT license.

   See file LICENSE for detail or copy at https://opensource.org/licenses/MIT

*/

/* Helper functions for storing integer values into byte streams.

   No bounds checking is performed, that is the responsibility of the caller. */

#ifndef WOFF2_STORE_BYTES_H_

#define WOFF2_STORE_BYTES_H_

#include <inttypes.h>

#include <stddef.h>

#include <string.h>

#include "./port.h"

namespace woff2 {

inline size_t StoreU32(uint8_t* dst, size_t offset, uint32_t x) {

  dst[offset] = x >> 24;

  dst[offset + 1] = x >> 16;

  dst[offset + 2] = x >> 8;

  dst[offset + 3] = x;

  return offset + 4;

}

inline size_t Store16(uint8_t* dst, size_t offset, int x) {

#if defined(WOFF_LITTLE_ENDIAN)

  *reinterpret_cast<uint16_t*>(dst + offset) =

      ((x & 0xFF) << 8) | ((x & 0xFF00) >> 8);

#elif defined(WOFF_BIG_ENDIAN)

  *reinterpret_cast<uint16_t*>(dst + offset) = static_cast<uint16_t>(x);

#else

  dst[offset] = x >> 8;

  dst[offset + 1] = x;

#endif

  return offset + 2;

}

inline void StoreU32(uint32_t val, size_t* offset, uint8_t* dst) {

  dst[(*offset)++] = val >> 24;

  dst[(*offset)++] = val >> 16;

  dst[(*offset)++] = val >> 8;

  dst[(*offset)++] = val;

}

inline void Store16(int val, size_t* offset, uint8_t* dst) {

#if defined(WOFF_LITTLE_ENDIAN)

  *reinterpret_cast<uint16_t*>(dst + *offset) =

      ((val & 0xFF) << 8) | ((val & 0xFF00) >> 8);

  *offset += 2;

#elif defined(WOFF_BIG_ENDIAN)

  *reinterpret_cast<uint16_t*>(dst + *offset) = static_cast<uint16_t>(val);

  *offset += 2;

#else

  dst[(*offset)++] = val >> 8;

  dst[(*offset)++] = val;

#endif

}

inline void StoreBytes(const uint8_t* data, size_t len,

                       size_t* offset, uint8_t* dst) {

  memcpy(&dst[*offset], data, len);

  *offset += len;

}

} // namespace woff2

#endif  // WOFF2_STORE_BYTES_H_