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/*
* misc/util.h - Common utility functions
*
* Written 2016 by Werner Almesberger
* Copyright 2016 Werner Almesberger
*
* 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 2 of the License, or
* (at your option) any later version.
*/
#ifndef MISC_UTIL_H
#define MISC_UTIL_H
#include <stdarg.h>
#include <stdbool.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#define alloc_size(s) \
({ void *alloc_size_tmp = malloc(s); \
if (!alloc_size_tmp) { \
perror("malloc"); \
exit(1); \
} \
alloc_size_tmp; })
#define alloc_type(t) ((t *) alloc_size(sizeof(t)))
#define alloc_type_n(t, n) ((t *) alloc_size(sizeof(t) * (n)))
#define realloc_size(p, s) \
({ void *alloc_size_tmp = realloc((p), (s)); \
if (!alloc_size_tmp) { \
perror("realloc"); \
exit(1); \
} \
alloc_size_tmp; })
#define realloc_type_n(p, t, n) ((t *) realloc_size((p), sizeof(t) * (n)))
#define stralloc(s) \
({ char *stralloc_tmp = strdup(s); \
if (!stralloc_tmp) { \
perror("strdup"); \
exit(1); \
} \
stralloc_tmp; })
#define ARRAY_ELEMENTS(a) (sizeof(a) / sizeof(a[0]))
#define ARRAY_END(a) ((a) + ARRAY_ELEMENTS(a))
#define swap(a, b) \
({ typeof(a) _tmp = (a); a = (b); b = _tmp; })
#define sign1(x) ((x) < 0 ? -1 : 1)
#define unsupported(s) \
fprintf(stderr, __FILE__ ":%d: unsupported: " s "\n", __LINE__)
static inline bool strbegins(const char *s, const char *prefix)
{
return !strncmp(s, prefix, strlen(prefix));
}
int alloc_vprintf(char **s, const char *fmt, va_list ap)
__attribute__((format(printf, 2, 0)));
int alloc_printf(char **s, const char *fmt, ...)
__attribute__((format(printf, 2, 3)));
#endif /* !MISC_UTIL_H */
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