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/* Copyright 2021 Nick Brassel (@tzarc)
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include <stdbool.h>
#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>
#include "qp_internal.h"
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// Stream API
typedef struct qp_stream_t qp_stream_t;
#define qp_stream_get(stream_ptr) (((qp_stream_t *)(stream_ptr))->get((qp_stream_t *)(stream_ptr)))
#define qp_stream_put(stream_ptr, c) (((qp_stream_t *)(stream_ptr))->put((qp_stream_t *)(stream_ptr), (c)))
#define qp_stream_seek(stream_ptr, offset, origin) (((qp_stream_t *)(stream_ptr))->seek((qp_stream_t *)(stream_ptr), (offset), (origin)))
#define qp_stream_tell(stream_ptr) (((qp_stream_t *)(stream_ptr))->tell((qp_stream_t *)(stream_ptr)))
#define qp_stream_eof(stream_ptr) (((qp_stream_t *)(stream_ptr))->is_eof((qp_stream_t *)(stream_ptr)))
#define qp_stream_setpos(stream_ptr, offset) qp_stream_seek((stream_ptr), (offset), SEEK_SET)
#define qp_stream_getpos(stream_ptr) qp_stream_tell((stream_ptr))
#define qp_stream_read(output_buf, member_size, num_members, stream_ptr) qp_stream_read_impl((output_buf), (member_size), (num_members), (qp_stream_t *)(stream_ptr))
#define qp_stream_write(input_buf, member_size, num_members, stream_ptr) qp_stream_write_impl((input_buf), (member_size), (num_members), (qp_stream_t *)(stream_ptr))
uint32_t qp_stream_read_impl(void *output_buf, uint32_t member_size, uint32_t num_members, qp_stream_t *stream);
uint32_t qp_stream_write_impl(const void *input_buf, uint32_t member_size, uint32_t num_members, qp_stream_t *stream);
#define STREAM_EOF ((int16_t)(-1))
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// Stream definition
struct qp_stream_t {
int16_t (*get)(qp_stream_t *stream);
bool (*put)(qp_stream_t *stream, uint8_t c);
int (*seek)(qp_stream_t *stream, int32_t offset, int origin);
int32_t (*tell)(qp_stream_t *stream);
bool (*is_eof)(qp_stream_t *stream);
};
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// Memory streams
typedef struct qp_memory_stream_t {
qp_stream_t base;
uint8_t * buffer;
int32_t length;
int32_t position;
bool is_eof;
} qp_memory_stream_t;
qp_memory_stream_t qp_make_memory_stream(void *buffer, int32_t length);
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// FILE streams
#ifdef QP_STREAM_HAS_FILE_IO
typedef struct qp_file_stream_t {
qp_stream_t base;
FILE * file;
} qp_file_stream_t;
qp_file_stream_t qo_make_file_stream(FILE *f);
#endif // QP_STREAM_HAS_FILE_IO
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