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#pragma once
#include <stddef.h>
#include <stdint.h>
#ifdef __cplusplus
extern "C" {
#endif
struct pb_msg {
uint16_t addr;
char* data;
size_t length;
};
/**
* \brief Read chunk of input stream, and store resulting message in \p target
*
* This function is called for each chunk of data from an input stream, and
* will parse the next puzzle bus message into \p target. The input stream is
* assumed to only contain messages encoded by \p pb_write()
*
* \param target pointer to struct that will contain the finished message data
* \param buf pointer to input stream data chunk
* \param buf_sz size of \p buf
*
* \returns boolean true if a message was completely read, false if more data
* is required
*
* \note target->data will automatically be allocated by this function, and
* must be `free()`d by the caller when finished
*/
bool pb_read(struct pb_msg* target, char* buf, size_t buf_sz);
/**
* \brief Allocate and write a msgpack-formatted message to \p buf
*
* This function allocates a buffer large enough to fit the message specified
* in \p target, and encodes the data in \p target in a format that can be
* decoded later using \p pb_read()
*
* \param target pointer to struct that contains the message data
* \param buf pointer to \c char* that will contain the formatted message
* \param buf_sz pointer to \c size_t that will represent the final size of \p buf
*
* \returns boolean true if a the message could be encoded successfully, false
* if there was some kind of error
*
* \note the pointer stored in \p buf must be `free()`d by the caller afterwards
*/
bool pb_write(struct pb_msg* target, char** buf, size_t* buf_sz);
#ifdef __cplusplus
}
#endif
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