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#ifndef _UTIL_H
#define _UTIL_H
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define exit_if(_cond, _fmt, ...) \
if (_cond) { \
fprintf(stderr, "Fatal error: " _fmt "\n", ##__VA_ARGS__); \
exit(EXIT_FAILURE); \
}
#define pexit_if(_cond, _fmt, ...) \
exit_if(_cond, _fmt ": %s", ##__VA_ARGS__, strerror(errno))
#define nelems(_array) \
(sizeof(_array) / sizeof(_array[0]))
#define cstrlen(_str) \
(sizeof(_str) - 1)
unsigned get_ncpus(void);
void ask_string(char *buf, int len, const char *prompt, const char *def);
void ask_num(int *res, int max, const char *prompt, int def);
#endif /* _UTIL_H */
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