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/*
* Copyright (c) 2006-2023, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
*/
#ifndef __DFS_SEQ_FILE_H__
#define __DFS_SEQ_FILE_H__
#include <dfs.h>
#include <dfs_fs.h>
struct dfs_seq_ops;
struct dfs_seq_file
{
char *buf;
size_t size;
size_t from;
size_t count;
size_t pad_until;
off_t index;
off_t read_pos;
struct rt_mutex lock;
const struct dfs_seq_ops *ops;
const struct dfs_file *file;
void *data;
};
struct dfs_seq_ops
{
void *(*start)(struct dfs_seq_file *seq, off_t *index);
void (*stop)(struct dfs_seq_file *seq, void *data);
void *(*next)(struct dfs_seq_file *seq, void *data, off_t *index);
int (*show)(struct dfs_seq_file *seq, void *data);
};
/**
* check if the buffer is full
*/
static inline rt_bool_t dfs_seq_is_full(struct dfs_seq_file *seq)
{
return seq->count == seq->size;
}
/**
* set padding width size
*/
static inline void dfs_seq_setwidth(struct dfs_seq_file *seq, size_t size)
{
seq->pad_until = seq->count + size;
}
int dfs_seq_open(struct dfs_file *file, const struct dfs_seq_ops *ops);
ssize_t dfs_seq_read(struct dfs_file *file, void *buf, size_t size, off_t *pos);
ssize_t dfs_seq_lseek(struct dfs_file *file, off_t offset, int whence);
int dfs_seq_release(struct dfs_file *file);
int dfs_seq_write(struct dfs_seq_file *seq, const void *data, size_t len);
void dfs_seq_vprintf(struct dfs_seq_file *seq, const char *fmt, va_list args);
void dfs_seq_printf(struct dfs_seq_file *seq, const char *fmt, ...);
void dfs_seq_putc(struct dfs_seq_file *seq, char c);
void dfs_seq_puts(struct dfs_seq_file *seq, const char *s);
void dfs_seq_pad(struct dfs_seq_file *seq, char c);
#endif
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