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