/******************************************************************************
 * Copyright (c) 2022 Telink Semiconductor (Shanghai) Co., Ltd. ("TELINK")
 * All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 *****************************************************************************/
#include "tl_common.h"
#include "drivers.h"
#include "utility.h"


// general swap/endianess utils

void swapN(unsigned char *p, int n)
{
	int i, c;
	for (i=0; i<n/2; i++)
	{
		c = p[i];
		p[i] = p[n - 1 - i];
		p[n - 1 - i] = c;
	}
}

void swapX(const u8 *src, u8 *dst, int len)
{
    int i;
    for (i = 0; i < len; i++)
        dst[len - 1 - i] = src[i];
}

void swap24(u8 dst[3], const u8 src[3])
{
    swapX(src, dst, 3);
}

void swap32(u8 dst[4], const u8 src[4])
{
    swapX(src, dst, 4);
}

void swap48(u8 dst[7], const u8 src[7])
{
    swapX(src, dst, 6);
}

void swap56(u8 dst[7], const u8 src[7])
{
    swapX(src, dst, 7);
}

void swap64(u8 dst[8], const u8 src[8])
{
    swapX(src, dst, 8);
}

void swap128(u8 dst[16], const u8 src[16])
{
    swapX(src, dst, 16);
}



void flip_addr(u8 *dest, u8 *src){
    dest[0] = src[5];
    dest[1] = src[4];
    dest[2] = src[3];
    dest[3] = src[2];
    dest[4] = src[1];
    dest[5] = src[0];
}



void my_fifo_init (my_fifo_t *f, int s, u8 n, u8 *p)
{
	f->size = s;
	f->num = n;
	f->wptr = 0;
	f->rptr = 0;
	f->p = p;
}

u8* my_fifo_wptr (my_fifo_t *f)
{
	if (((f->wptr - f->rptr) & 255) < f->num)
	{
		return f->p + (f->wptr & (f->num-1)) * f->size;
	}
	return 0;
}

u8* my_fifo_wptr_v2 (my_fifo_t *f)
{
	if (((f->wptr - f->rptr) & 255) < f->num - 3) //keep 3 fifo left for others evt
	{
		return f->p + (f->wptr & (f->num-1)) * f->size;
	}
	return 0;
}

void my_fifo_next (my_fifo_t *f)
{
	f->wptr++;
}

int my_fifo_push (my_fifo_t *f, u8 *p, int n)
{
	if (((f->wptr - f->rptr) & 255) >= f->num)
	{
		return -1;
	}

	if (n >= f->size)
	{
		return -1;
	}
	u8 *pd = f->p + (f->wptr++ & (f->num-1)) * f->size;
	*pd++ = n & 0xff;
	*pd++ = (n >> 8) & 0xff;
	memcpy (pd, p, n);
	return 0;
}

void my_fifo_pop (my_fifo_t *f)
{
	f->rptr++;
}

u8 * my_fifo_get (my_fifo_t *f)
{
	if (f->rptr != f->wptr)
	{
		u8 *p = f->p + (f->rptr & (f->num-1)) * f->size;
		return p;
	}
	return 0;
}