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#ifndef DIRBUF_H

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#define DIRBUF_H

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/*

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 * Simple dirent building

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 */

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#include "evfuse.h"

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/*

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 * Holds the dir entries

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 */ 

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struct dirbuf {

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    char *buf;

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    size_t len;

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    off_t off, req_off;

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};

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// maximum length for a dirbuf name, including NUL byte

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#define DIRBUF_NAME_MAX 256

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/*

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 * Initialize a dirbuf for a request. The dirbuf will be filled with at most req_size bytes of dir entries.

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 *

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 *  req_size    - how many bytes of dirbuf data we want, at most 

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 *  req_off     - the offset of the first dirent to include

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 */

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int dirbuf_init (struct dirbuf *buf, size_t req_size, off_t req_off);

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/*

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 * Estimate how many dir entries will, at most, fit into a difbuf of the given size, based on a minimum filename size.

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 */

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size_t dirbuf_estimate (struct dirbuf *buf, size_t min_namelen);

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/*

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 * Add an dir entry to the dirbuf. The dirbuf should not be full.

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 *

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 * Offsets are followed:

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 *  ent_off     - the offset of this dirent

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 *  next_off    - the offset of the next dirent

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 *

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 * Only the S_IFMT bits of ent_mode are relevant.

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 *

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 * Returns 0 if the ent was added or skipped, -1 on error, 1 if the dirbuf is full (no more ents should be added).

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 */

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int dirbuf_add (fuse_req_t req, struct dirbuf *buf, off_t ent_off, off_t next_off, const char *ent_name, fuse_ino_t ent_ino, mode_t ent_mode);

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/*

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 * Attempt to send the readdir reply, free the buf, and return the error code from fuse_reply_buf

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 */

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int dirbuf_done (fuse_req_t req, struct dirbuf *buf);

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/*

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 * Release the dirop without sending any reply back.

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 *

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 * This is safe to be called multiple times.

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 */

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void dirbuf_release (struct dirbuf *buf);

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#endif /* DIRBUF_H */