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/*
* util.c
*/
#include <stdio.h>
#include <string.h>
#include <stdarg.h>
#include "util.h"
/*
* Special versions of some string handling functions,
* to avoid buffer overflows.
*/
/*
* This always NUL-terminates the buffer, even if vsnprintf does not.
*/
void p_snprintf(char *buf, size_t maxsize, const char *fmt, ...)
{
va_list args;
va_start(args, fmt);
vsnprintf(buf, maxsize, fmt, args);
buf[maxsize - 1] = '\0';
va_end(args);
}
void p_vsnprintf(char *buf, size_t maxsize, const char *fmt, va_list args)
{
vsnprintf(buf, maxsize, fmt, args);
buf[maxsize - 1] = '\0';
}
void p_strcpy(char *dest, const char *src, size_t maxsize)
{
size_t len;
len = strlen(src);
if(len > maxsize - 1)
len = maxsize - 1;
memcpy(dest, src, len);
dest[len] = '\0';
}
void p_strcat(char *dest, const char *src, size_t maxsize)
{
size_t len_d, len_s;
len_d = strlen(dest);
len_s = strlen(src);
if(len_d + len_s > maxsize - 1)
len_s = maxsize - 1 - len_d;
if(len_d < 1)
return;
memcpy(dest + len_d, src, len_s);
dest[len_d + len_s] = '\0';
}
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