Jpp 19.3.0-rc.1
the software that should make you happy
Loading...
Searching...
No Matches
strlcpy.cc
Go to the documentation of this file.
1/********************************************************************\
2
3 Name: strlcpy.c
4 Created by: Stefan Ritt
5 Copyright 2000 + Stefan Ritt
6
7 Contents: Contains strlcpy and strlcat which are versions of
8 strcpy and strcat, but which avoid buffer overflows
9
10
11 This file is part of MIDAS XML Library.
12
13 MIDAS XML Library is free software: you can redistribute it and/or modify
14 it under the terms of the GNU General Public License as published by
15 the Free Software Foundation, either version 3 of the License, or
16 (at your option) any later version.
17
18 MIDAS XML Library is distributed in the hope that it will be useful,
19 but WITHOUT ANY WARRANTY; without even the implied warranty of
20 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 GNU General Public License for more details.
22
23 You should have received a copy of the GNU General Public License
24 along with MIDAS XML Library. If not, see <http://www.gnu.org/licenses/>.
25
26\********************************************************************/
27
28#include <stdio.h>
29#include <string.h>
30#include "strlcpy.h"
31
32/*
33* Copy src to string dst of size siz. At most siz-1 characters
34* will be copied. Always NUL terminates (unless size == 0).
35* Returns strlen(src); if retval >= siz, truncation occurred.
36*/
37#ifndef STRLCPY_DEFINED
38
39size_t strlcpy(char *dst, const char *src, size_t size)
40{
41 char *d = dst;
42 const char *s = src;
43 size_t n = size;
44
45 /* Copy as many bytes as will fit */
46 if (n != 0 && --n != 0) {
47 do {
48 if ((*d++ = *s++) == 0)
49 break;
50 } while (--n != 0);
51 }
52
53 /* Not enough room in dst, add NUL and traverse rest of src */
54 if (n == 0) {
55 if (size != 0)
56 *d = '\0'; /* NUL-terminate dst */
57 while (*s++);
58 }
59
60 return (s - src - 1); /* count does not include NUL */
61}
62
63/*-------------------------------------------------------------------*/
64
65/*
66* Appends src to string dst of size siz (unlike strncat, siz is the
67* full size of dst, not space left). At most siz-1 characters
68* will be copied. Always NUL terminates (unless size <= strlen(dst)).
69* Returns strlen(src) + MIN(size, strlen(initial dst)).
70* If retval >= size, truncation occurred.
71*/
72size_t strlcat(char *dst, const char *src, size_t size)
73{
74 char *d = dst;
75 const char *s = src;
76 size_t n = size;
77 size_t dlen;
78
79 /* Find the end of dst and adjust bytes left but don't go past end */
80 while (n-- != 0 && *d != '\0')
81 d++;
82 dlen = d - dst;
83 n = size - dlen;
84
85 if (n == 0)
86 return (dlen + strlen(s));
87 while (*s != '\0') {
88 if (n != 1) {
89 *d++ = *s;
90 n--;
91 }
92 s++;
93 }
94 *d = '\0';
95
96 return (dlen + (s - src)); /* count does not include NUL */
97}
98
99/*-------------------------------------------------------------------*/
100
101#endif // STRLCPY_DEFINED
size_t strlcat(char *dst, const char *src, size_t size)
Definition strlcpy.cc:72
size_t strlcpy(char *dst, const char *src, size_t size)
Definition strlcpy.cc:39