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/**
* Copyright © 2016 Mattias Andrée <maandree@member.fsf.org>
*
* 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/>.
*/
#include <string.h>
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#define try(...) do { if (!(__VA_ARGS__)) goto fail; } while (0)
#define t(...) do { if (__VA_ARGS__) goto fail; } while (0)
#define CLEANUP(...) do { int cleanup__ = errno; __VA_ARGS__; errno = cleanup__; } while (0)
#define xstrdup(outp, ...) \
do { \
const char *xstrdup__ = (__VA_ARGS__); \
if (xstrdup__) \
try (*(outp) = strdup(xstrdup__)); \
else \
*(outp) = NULL; \
} while (0)
#define xpread(fd, buf, len, off) t (pread(fd, buf, len, off) < (ssize_t)(len))
#define xpwrite(fd, buf, len, off) t (pwrite(fd, buf, len, off) < (ssize_t)(len))
#define xread(fd, buf, len) t (read(fd, buf, len) < (ssize_t)(len))
#define xwrite(fd, buf, len) t (write(fd, buf, len) < (ssize_t)(len))
#define xcalloc(outp, num) try (*(outp) = calloc(num, sizeof(**(outp))))
#define xmalloc(outp, num) try (*(outp) = malloc((num) * sizeof(**(outp))))
#define xrealloc(outp, num) \
do { \
size_t n__ = (num); \
void *new__ = realloc(*(outp), n__ * sizeof(**(outp))); \
t (n__ && !new__); \
*(outp) = new__; \
} while (0)
#define SHRINK(outp, num) \
do { \
void *new__ = realloc(*(outp), (num) * sizeof(**(outp))); \
if (new__) *(outp) = new__; \
} while (0)
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