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#include <stddef.h>
#include "protocol.h"
#ifdef __cplusplus
extern "C" {
#endif
cd_cmd_id_t g_cd_protocol_fresh_message_id = 0;
size_t cd_cmd_sizeof(uint8_t data[CD_SERIAL_READ_BUFFER_SIZE], uint8_t data_length) {
cd_cmd_opcode_t opcode = data[0];
if (CD_CMD_HANDLERS_SIZE[opcode] > 0) return CD_CMD_HANDLERS_SIZE[opcode];
cd_s_bin *copy = cd_bin_s_alloc(data_length, data);
size_t length = (*CD_CMD_HANDLERS_SIZEOF[opcode])(copy);
CD_FREE(copy);
return length;
}
/**
* @brief macro to calculate size of message based on struct with member to
* indicate length of dynamic (last) field
*
* @param data cd_s_bin pointer to currently received data
* @param struct_t message struct
* @param length_field struct field with dynamic length
*
* @return size_t with calculated size
*
* equivalent c code:
*
* size_t size = sizeof(struct_t);
* size_t dyn_member_offset = offsetof(struct_t, length_field);
* size_t dyn_member_size = sizeof(((struct_t*)0)->length_field);
* if (data->bytes >= (dyn_member_offset + dyn_member_size))
* size += cd_bin_ntohd(&data->data[dyn_member_offset], dyn_member_size);
* return size;
*/
#define CD_DYN_MEMBER_SIZEOF(data, struct_t, length_field) \
sizeof(struct_t) + ( \
(data->bytes >= (offsetof(struct_t, length_field) + sizeof(((struct_t*)0)->length_field))) ? \
(cd_bin_ntohd(&data->data[offsetof(struct_t, length_field)], sizeof(((struct_t*)0)->length_field))) :\
0);
size_t cd_cmd_response_sizeof(cd_s_bin* data) {
return CD_DYN_MEMBER_SIZEOF(data, cd_s_cmd_response, response_size);
}
cd_cmd_id_t cd_protocol_fresh_message_id() {
return g_cd_protocol_fresh_message_id++;
}
#ifdef __cplusplus
}
#endif
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