84 lines
1.8 KiB
C
84 lines
1.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#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 */
|