#ifndef __SUBCMD_UTIL_H#define __SUBCMD_UTIL_H #include <stdarg.h>#include <stdlib.h>#include <stdio.h> #define NORETURN __attribute__((__noreturn__)) static inline void report(const char *prefix, const char *err, va_list params){	char msg[1024];	vsnprintf(msg, sizeof(msg), err, params);	fprintf(stderr, " %s%s\n", prefix, msg);} static NORETURN inline void die(const char *err, ...){	va_list params; 	va_start(params, err);	report(" Fatal: ", err, params);	exit(128);	va_end(params);} #define zfree(ptr) ({ free(*ptr); *ptr = NULL; }) #define alloc_nr(x) (((x)+16)*3/2) /* * Realloc the buffer pointed at by variable 'x' so that it can hold * at least 'nr' entries; the number of entries currently allocated * is 'alloc', using the standard growing factor alloc_nr() macro. * * DO NOT USE any expression with side-effect for 'x' or 'alloc'. */#define ALLOC_GROW(x, nr, alloc) \	do { \		if ((nr) > alloc) { \			if (alloc_nr(alloc) < (nr)) \				alloc = (nr); \			else \				alloc = alloc_nr(alloc); \			x = xrealloc((x), alloc * sizeof(*(x))); \		} \	} while(0) static inline void *xrealloc(void *ptr, size_t size){	void *ret = realloc(ptr, size);	if (!ret && !size)		ret = realloc(ptr, 1);	if (!ret) {		ret = realloc(ptr, size);		if (!ret && !size)			ret = realloc(ptr, 1);		if (!ret)			die("Out of memory, realloc failed");	}	return ret;} #define astrcatf(out, fmt, ...)						\({									\	char *tmp = *(out);						\	if (asprintf((out), "%s" fmt, tmp ?: "", ## __VA_ARGS__) == -1)	\		die("asprintf failed");					\	free(tmp);							\}) static inline void astrcat(char **out, const char *add){	char *tmp = *out; 	if (asprintf(out, "%s%s", tmp ?: "", add) == -1)		die("asprintf failed"); 	free(tmp);} #endif /* __SUBCMD_UTIL_H */