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/*
Line based I/O over fds
Copyright (C) Amitay Isaacs 2018
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 3 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/>.
*/
#ifndef __CTDB_LINE_H__
#define __CTDB_LINE_H__
#include <talloc.h>
/**
* @file line.h
*
* @brief Line based I/O over pipes and sockets
*/
/**
* @brief The callback routine called to process a line
*
* @param[in] line The line read
* @param[in] private_data Private data for callback
* @return 0 to continue processing lines, non-zero to stop reading
*/
typedef int (*line_process_fn_t)(char *line, void *private_data);
/**
* @brief Read a line (terminated by \n or \0)
*
* If there is any read error on fd, then errno will be returned.
* If callback function returns a non-zero value, then that value will be
* returned.
*
* @param[in] fd The file descriptor
* @param[in] length The expected length of a line (this is only a hint)
* @param[in] mem_ctx Talloc memory context
* @param[in] callback Callback function called when a line is read
* @param[in] private_data Private data for callback
* @param[out] num_lines Number of lines read so far
* @return 0 on on success, errno on failure
*/
int line_read(int fd,
size_t length,
TALLOC_CTX *mem_ctx,
line_process_fn_t callback,
void *private_data,
int *num_lines);
#endif /* __CTDB_LINE_H__ */
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