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#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include "eos.h"
#include "event.h"
#define IDX_MASK(IDX, SIZE) ((IDX) & ((SIZE) - 1))
#define IDX_HALF ((uint8_t)1 << (sizeof(uint8_t) * 8 - 1))
#define IDX_LT(a,b) ((uint8_t)((uint8_t)(a) - (uint8_t)(b)) > IDX_HALF)
#define IDX_LTE(a,b) ((uint8_t)((uint8_t)(b) - (uint8_t)(a)) < IDX_HALF)
void eos_msg_init(EOSMessage *msg, unsigned char *buffer, uint16_t size) {
msg->buffer = buffer;
msg->size = size;
}
void eos_msgq_init(EOSMsgQ *msgq, EOSMsgItem *array, uint8_t size) {
msgq->idx_r = 0;
msgq->idx_w = 0;
msgq->size = size;
msgq->array = array;
}
uint8_t eos_msgq_len(EOSMsgQ *msgq) {
return (uint8_t)(msgq->idx_w - msgq->idx_r);
}
int eos_msgq_push(EOSMsgQ *msgq, unsigned char type, EOSMessage *msg, uint16_t len) {
return eos_msgq_push_widx(msgq, type, msg, len, NULL);
}
int eos_msgq_push_widx(EOSMsgQ *msgq, unsigned char type, EOSMessage *msg, uint16_t len, uint8_t *_idx) {
uint8_t idx;
if ((uint8_t)(msgq->idx_w - msgq->idx_r) == msgq->size) return EOS_ERR_FULL;
idx = IDX_MASK(msgq->idx_w, msgq->size);
msgq->array[idx].type = type;
if (msg) {
msgq->array[idx].buffer = msg->buffer;
msgq->array[idx].size = msg->size;
msgq->array[idx].len = len;
} else {
msgq->array[idx].buffer = NULL;
msgq->array[idx].size = 0;
msgq->array[idx].len = 0;
}
msgq->idx_w++;
if (_idx) *_idx = idx;
return EOS_OK;
}
void eos_msgq_pop(EOSMsgQ *msgq, unsigned char *type, EOSMessage *msg, uint16_t *len) {
eos_msgq_pop_widx(msgq, type, msg, len, NULL);
}
void eos_msgq_pop_widx(EOSMsgQ *msgq, unsigned char *type, EOSMessage *msg, uint16_t *len, uint8_t *_idx) {
if (msgq->idx_r == msgq->idx_w) {
*type = 0;
msg->buffer = NULL;
msg->size = 0;
*len = 0;
} else {
uint8_t idx = IDX_MASK(msgq->idx_r, msgq->size);
*type = msgq->array[idx].type;
msg->buffer = msgq->array[idx].buffer;
msg->size = msgq->array[idx].size;
*len = msgq->array[idx].len;
msgq->idx_r++;
if (_idx) *_idx = idx;
}
}
void eos_bufq_init(EOSBufQ *bufq, unsigned char **array, uint8_t size) {
bufq->idx_r = 0;
bufq->idx_w = 0;
bufq->size = size;
bufq->array = array;
}
uint8_t eos_bufq_len(EOSBufQ *bufq) {
return (uint8_t)(bufq->idx_w - bufq->idx_r);
}
int eos_bufq_push(EOSBufQ *bufq, unsigned char *buffer) {
if ((uint8_t)(bufq->idx_w - bufq->idx_r) == bufq->size) return EOS_ERR_FULL;
bufq->array[IDX_MASK(bufq->idx_w++, bufq->size)] = buffer;
return EOS_OK;
}
unsigned char *eos_bufq_pop(EOSBufQ *bufq) {
if (bufq->idx_r == bufq->idx_w) return NULL;
return bufq->array[IDX_MASK(bufq->idx_r++, bufq->size)];
}
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