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/*
* Copyright (c) 2023-2025 Ian Marco Moffett and the Osmora Team.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of Hyra nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _DEV_CONSVAR_H_
#define _DEV_CONSVAR_H_
#include <sys/types.h>
#include <sys/param.h>
/* Buffer types */
#define CONS_BUF_INPUT 0
#define CONS_BUF_OUTPUT 1
/* Buffer flags */
#define CONS_BUF_CLEAN BIT(0) /* Not recently written to */
extern struct cons_screen scr;
/*
* The keyboard packet is two bytes
* and the bits are as follows:
*
* - 0:7 ~ ASCII character
* - 8:15 ~ Scancode
*/
struct cons_input {
union {
uint8_t chr;
uint8_t scancode;
};
uint16_t data;
};
/*
* A circular buffer for buffering
* keyboard input or console output.
*/
struct cons_buf {
union {
struct cons_input *ibuf;
struct cons_char *obuf;
void *raw;
};
uint8_t tail;
uint8_t head;
uint8_t type;
uint8_t flags;
size_t len;
};
struct cons_buf *cons_new_buf(uint8_t type, size_t len);
int cons_obuf_push(struct cons_buf *bp, struct cons_char c);
int cons_obuf_pop(struct cons_buf *bp, struct cons_char *res);
int cons_ibuf_push(struct cons_screen *scr, struct cons_input input);
int cons_ibuf_pop(struct cons_screen *scr, struct cons_input *res);
#endif /* !_DEV_CONSVAR_H_ */
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