DiskBrowser/asprintf.c

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1.1 KiB
C
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#ifdef __ORCAC__
#pragma optimize -1 /* must be at least 8 */
#pragma noroot
#endif
#include <stdio.h>
#include <stdarg.h>
#include <stdlib.h>
#include <limits.h>
int asprintf(char **ret, const char *format, ...) {
va_list va;
int i;
int length = -1;
*ret = NULL;
for (i = 0; i < 2; i++) {
va_start(va, format);
length = vsnprintf(*ret, length+1, format, va);
if (length <= 0 || length == INT_MAX) {
length = -1;
if (i > 0)
free(*ret);
*ret = NULL;
goto done;
}
if (i == 0) {
*ret = malloc(length+1);
if (*ret == NULL) {
length = -1;
goto done;
}
#ifndef __ORCAC__
/* Should be here per standard, but ORCA/C allows only one va_end */
va_end(va);
#endif
}
}
done:
va_end(va);
return length;
}
#ifdef TEST_ASPRINTF
int main(void) {
char *s;
asprintf(&s, "testing %i %i %x", 1, 2, 3);
printf("%s\n", s);
}
#endif