#ifndef __BUFFER_H__
#define __BUFFER_H__

#include <stddef.h>
#include <stdint.h>

typedef struct read_buffer_t {
  const char *buffer;
  size_t size, index;
} read_buffer_t;

typedef struct write_buffer_t {
  char *buffer;
  size_t size, index;
} write_buffer_t;

/**
 * Init the read buffer.
 *
 * The caller owns the memory pointed to by "data". The lifetime of the memory
 * should persist across the lifetime of the buffer.
 *
 * @param[in] buffer The buffer to initialize.
 * @param[in] data The array of bytes to read from.
 * @param[in] size The size of the array of bytes.
 */

void buffer_read_init(read_buffer_t *buffer, const char *data, size_t size);

/**
 * Init the write buffer.
 *
 * @param[in] buffer The buffer to initialize.
 * @param[out] data The array of bytes to write to.
 * @param[in] size The size of the array of bytes.
 */
void buffer_write_init(write_buffer_t *buffer, char *data, size_t size);

/**
 * Read an array of bytes from the buffer.
 *
 * @param[in] buffer The buffer to read from.
 * @param[out] data The read data.
 * @param[in] size The size of the array of bytes.
 * @return 1 if there are not enough bytes to read from the buffer, 0 otherwise.
 */
int buffer_read_buffer(read_buffer_t *buffer, char *data, size_t size);

/**
 * Write an array of bytes to the buffer.
 *
 * @param[in] buffer The buffer to write to.
 * @param[in] data The data to write.
 * @param[in] size The size of the array of bytes.
 * @return 1 if there is not enough room in the buffer to write the data, 0
 * otherwise.
 */
int buffer_write_buffer(write_buffer_t *buffer, const char *data, size_t size);

/**
 * Read an uint32_t from the buffer.
 *
 * @param[in] buffer The buffer to read from.
 * @param[out] data The read data.
 * @return 1 if there are not enough bytes to read from the buffer, 0 otherwise.
 */
int buffer_read_uint32(read_buffer_t *buffer, uint32_t *data);

/**
 * Write an uint32_t to the buffer.
 *
 * @param[in] buffer The buffer to write to.
 * @param[in] data The data to write.
 * @return 1 if there is not enough room in the buffer to write the data, 0
 * otherwise.
 */
int buffer_write_uint32(write_buffer_t *buffer, uint32_t data);

/**
 * Read an uint16_t from the buffer.
 *
 * @param[in] buffer The buffer to read from.
 * @param[out] data The read data.
 * @return 1 if there are not enough bytes to read from the buffer, 0 otherwise.
 */
int buffer_read_uint16(read_buffer_t *buffer, uint16_t *data);

/**
 * Write an uint16_t to the buffer.
 *
 * @param[in] buffer The buffer to write to.
 * @param[in] data The data to write.
 * @return 1 if there is not enough room in the buffer to write the data, 0
 * otherwise.
 */
int buffer_write_uint16(write_buffer_t *buffer, uint16_t data);

/**
 * Read an uint8_t from the buffer.
 *
 * @param[in] buffer The buffer to read from.
 * @param[out] data The read data.
 * @return 1 if there are not enough bytes to read from the buffer, 0 otherwise.
 */
int buffer_read_uint8(read_buffer_t *buffer, uint8_t *data);

/**
 * Write an uint8_t to the buffer.
 *
 * @param[in] buffer The buffer to write to.
 * @param[in] data The data to write.
 * @return 1 if there is not enough room in the buffer to write the data, 0
 * otherwise.
 */
int buffer_write_uint8(write_buffer_t *buffer, uint8_t data);

/**
 * Read an int32_t from the buffer.
 *
 * @param[in] buffer The buffer to read from.
 * @param[out] data The read data.
 * @return 1 if there are not enough bytes to read from the buffer, 0 otherwise.
 */
int buffer_read_int32(read_buffer_t *buffer, int32_t *data);

/**
 * Write an int32_t to the buffer.
 *
 * @param[in] buffer The buffer to write to.
 * @param[in] data The data to write.
 * @return 1 if there is not enough room in the buffer to write the data, 0
 * otherwise.
 */
int buffer_write_int32(write_buffer_t *buffer, int32_t data);

/**
 * Read an int16_t from the buffer.
 *
 * @param[in] buffer The buffer to read from.
 * @param[out] data The read data.
 * @return 1 if there are not enough bytes to read from the buffer, 0 otherwise.
 */
int buffer_read_int16(read_buffer_t *buffer, int16_t *data);

/**
 * Write an int16_t to the buffer.
 *
 * @param[in] buffer The buffer to write to.
 * @param[in] data The data to write.
 * @return 1 if there is not enough room in the buffer to write the data, 0
 * otherwise.
 */
int buffer_write_int16(write_buffer_t *buffer, int16_t data);

/**
 * Read an int8_t from the buffer.
 *
 * @param[in] buffer The buffer to read from.
 * @param[out] data The read data.
 * @return 1 if there are not enough bytes to read from the buffer, 0 otherwise.
 */
int buffer_read_int8(read_buffer_t *buffer, int8_t *data);

/**
 * Write an int8_t to the buffer.
 *
 * @param[in] buffer The buffer to write to.
 * @param[in] data The data to write.
 * @return 1 if there is not enough room in the buffer to write the data, 0
 * otherwise.
 */
int buffer_write_int8(write_buffer_t *buffer, int8_t data);

#endif  // __BUFFER_H__