/**
* Copyright © 2015 Mattias Andrée <maandree@member.fsf.org>
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#include <stddef.h>
/**
* The file descriptor for the socket.
*/
#define SOCK_FILENO 3
/**
* The file descriptor for the state file.
*/
#define STATE_FILENO 4
#ifndef t
/**
* Go to `fail` if a statement evaluates to non-zero.
*
* @param ... The statement.
*/
# define t(...) do { if (__VA_ARGS__) goto fail; } while (0)
#endif
/**
* Wrapper for `read` that reads all available data.
*
* Sets `errno` to `EBADMSG` on success.
*
* @param fd The file descriptor from which to to read.
* @param buf Output parameter for the data.
* @param n Output parameter for the number of read bytes.
* @return 0 on success, -1 on error.
*
* @throws Any exception specified for read(3).
* @throws Any exception specified for realloc(3).
*/
int readall(int fd, char **buf, size_t *n);
/**
* Unmarshal a `NULL`-terminated string array.
*
* The elements are not actually copied, subpointers
* to `buf` are stored in the returned list.
*
* @param buf The marshalled array. Must end with a NUL byte.
* @param len The length of `buf`.
* @param n Output parameter for the number of elements. May be `NULL`
* @return The list, `NULL` on error.
*
* @throws Any exception specified for realloc(3).
*/
char **restore_array(char* buf, size_t len, size_t* n);
/**
* Create `NULL`-terminate subcopy of an list,
*
* @param list The list.
* @param n The number of elements in the new sublist.
* @return The sublist, `NULL` on error.
*
* @throws Any exception specified for malloc(3).
*/
char **sublist(char *const *list, size_t n);
