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/*
* Copyright (C) 2002-2022 Free Software Foundation, Inc.
*
* This file is part of LIBTASN1.
*
* The LIBTASN1 library is free software; you can redistribute it
* and/or modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA
*/
#include <int.h>
#include "gstr.h"
/* These function are like strcat, strcpy. They only
* do bounds checking (they shouldn't cause buffer overruns),
* and they always produce null terminated strings.
*
* They should be used only with null terminated strings.
*/
void
_asn1_str_cat (char *dest, size_t dest_tot_size, const char *src)
{
size_t str_size = strlen (src);
size_t dest_size = strlen (dest);
if (dest_tot_size - dest_size > str_size)
{
strcat (dest, src);
}
else
{
if (dest_tot_size > dest_size)
{
strncat (dest, src, (dest_tot_size - dest_size) - 1);
dest[dest_tot_size - 1] = 0;
}
}
}
/* Returns the bytes copied (not including the null terminator) */
unsigned int
_asn1_str_cpy (char *dest, size_t dest_tot_size, const char *src)
{
size_t str_size = strlen (src);
if (dest_tot_size > str_size)
{
strcpy (dest, src);
return str_size;
}
else
{
if (dest_tot_size > 0)
{
str_size = dest_tot_size - 1;
memcpy (dest, src, str_size);
dest[str_size] = 0;
return str_size;
}
else
return 0;
}
}
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