1 #ifndef __SUBCMD_UTIL_H
2 #define __SUBCMD_UTIL_H
8 #define NORETURN __attribute__((__noreturn__))
10 static inline void report(const char *prefix, const char *err, va_list params)
13 vsnprintf(msg, sizeof(msg), err, params);
14 fprintf(stderr, " %s%s\n", prefix, msg);
17 static NORETURN inline void die(const char *err, ...)
21 va_start(params, err);
22 report(" Fatal: ", err, params);
27 #define zfree(ptr) ({ free(*ptr); *ptr = NULL; })
29 #define alloc_nr(x) (((x)+16)*3/2)
32 * Realloc the buffer pointed at by variable 'x' so that it can hold
33 * at least 'nr' entries; the number of entries currently allocated
34 * is 'alloc', using the standard growing factor alloc_nr() macro.
36 * DO NOT USE any expression with side-effect for 'x' or 'alloc'.
38 #define ALLOC_GROW(x, nr, alloc) \
41 if (alloc_nr(alloc) < (nr)) \
44 alloc = alloc_nr(alloc); \
45 x = xrealloc((x), alloc * sizeof(*(x))); \
49 static inline void *xrealloc(void *ptr, size_t size)
51 void *ret = realloc(ptr, size);
53 die("Out of memory, realloc failed");
57 #define astrcatf(out, fmt, ...) \
60 if (asprintf((out), "%s" fmt, tmp ?: "", ## __VA_ARGS__) == -1) \
61 die("asprintf failed"); \
65 static inline void astrcat(char **out, const char *add)
69 if (asprintf(out, "%s%s", tmp ?: "", add) == -1)
70 die("asprintf failed");
75 static inline int prefixcmp(const char *str, const char *prefix)
77 for (; ; str++, prefix++)
80 else if (*str != *prefix)
81 return (unsigned char)*prefix - (unsigned char)*str;
84 #endif /* __SUBCMD_UTIL_H */