corrected copyright notices
[gnutls.git] / lib / minitasn1 / gstr.c
blob0558c77771cd28a1cc2c6b274d523c7ba50c74d2
1 /*
2 * Copyright (C) 2002-2012 Free Software Foundation, Inc.
4 * This file is part of LIBTASN1.
6 * The LIBTASN1 library is free software; you can redistribute it
7 * and/or modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
19 * 02110-1301, USA
22 #include <int.h>
23 #include "gstr.h"
25 /* These function are like strcat, strcpy. They only
26 * do bounds checking (they shouldn't cause buffer overruns),
27 * and they always produce null terminated strings.
29 * They should be used only with null terminated strings.
31 void
32 _asn1_str_cat (char *dest, size_t dest_tot_size, const char *src)
34 size_t str_size = strlen (src);
35 size_t dest_size = strlen (dest);
37 if (dest_tot_size - dest_size > str_size)
39 strcat (dest, src);
41 else
43 if (dest_tot_size - dest_size > 0)
45 strncat (dest, src, (dest_tot_size - dest_size) - 1);
46 dest[dest_tot_size - 1] = 0;
51 /* Returns the bytes copied (not including the null terminator) */
52 unsigned int
53 _asn1_str_cpy (char *dest, size_t dest_tot_size, const char *src)
55 size_t str_size = strlen (src);
57 if (dest_tot_size > str_size)
59 strcpy (dest, src);
60 return str_size;
62 else
64 if (dest_tot_size > 0)
66 str_size = dest_tot_size - 1;
67 memcpy (dest, src, str_size);
68 dest[str_size] = 0;
69 return str_size;
71 else return 0;