A fast, lightweight and minimalistic Wayland terminal emulator
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#include <assert.h>
#include <errno.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <syslog.h>
#include "xmalloc.h"
static NORETURN COLD void
fatal_error(const char *msg, int err)
{
syslog(LOG_ERR, "%s: %s", msg, strerror(err));
errno = err;
perror(msg);
abort();
}
static void *
check_alloc(void *alloc)
{
if (unlikely(alloc == NULL)) {
fatal_error(__func__, ENOMEM);
}
return alloc;
}
void *
xmalloc(size_t size)
{
if (unlikely(size == 0)) {
size = 1;
}
return check_alloc(malloc(size));
}
void *
xcalloc(size_t nmemb, size_t size)
{
assert(size != 0);
return check_alloc(calloc(likely(nmemb) ? nmemb : 1, size));
}
void *
xrealloc(void *ptr, size_t size)
{
void *alloc = realloc(ptr, size);
return unlikely(size == 0) ? alloc : check_alloc(alloc);
}
char *
xstrdup(const char *str)
{
return check_alloc(strdup(str));
}
char *
xstrndup(const char *str, size_t n)
{
return check_alloc(strndup(str, n));
}
static VPRINTF(2) int
xvasprintf_(char **strp, const char *format, va_list ap)
{
va_list ap2;
va_copy(ap2, ap);
int n = vsnprintf(NULL, 0, format, ap2);
if (unlikely(n < 0)) {
fatal_error("vsnprintf", EILSEQ);
}
va_end(ap2);
*strp = xmalloc(n + 1);
return vsnprintf(*strp, n + 1, format, ap);
}
static VPRINTF(1) char *
xvasprintf(const char *format, va_list ap)
{
char *str;
xvasprintf_(&str, format, ap);
return str;
}
char *
xasprintf(const char *format, ...)
{
va_list ap;
va_start(ap, format);
char *str = xvasprintf(format, ap);
va_end(ap);
return str;
}