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win_asprintf.c
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51 lines (46 loc) · 919 Bytes
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#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include "portability.h"
int
pcap_vasprintf(char **strp, const char *format, va_list args)
{
int len;
size_t str_size;
char *str;
int ret;
len = _vscprintf(format, args);
if (len == -1) {
*strp = NULL;
return (-1);
}
str_size = len + 1;
str = malloc(str_size);
if (str == NULL) {
*strp = NULL;
return (-1);
}
ret = pcap_vsnprintf(str, str_size, format, args);
if (ret == -1) {
free(str);
*strp = NULL;
return (-1);
}
*strp = str;
/*
* pcap_vsnprintf() shouldn't truncate the string, as we have
* allocated a buffer large enough to hold the string, so its
* return value should be the number of characters printed.
*/
return (ret);
}
int
pcap_asprintf(char **strp, const char *format, ...)
{
va_list args;
int ret;
va_start(args, format);
ret = pcap_vasprintf(strp, format, args);
va_end(args);
return (ret);
}