libltdl/lt_

/* */
This source file includes following definitions.
lt_strlcat
lt_strlcpy
   1 /* lt__strl.c -- size-bounded string copying and concatenation
   2 
   3    Copyright (C) 2004, 2011-2019, 2021-2022 Free Software Foundation,
   4    Inc.
   5    Written by Bob Friesenhahn, 2004
   6 
   7    NOTE: The canonical source of this file is maintained with the
   8    GNU Libtool package.  Report bugs to bug-libtool@gnu.org.
   9 
  10 GNU Libltdl is free software; you can redistribute it and/or
  11 modify it under the terms of the GNU Lesser General Public
  12 License as published by the Free Software Foundation; either
  13 version 2 of the License, or (at your option) any later version.
  14 
  15 As a special exception to the GNU Lesser General Public License,
  16 if you distribute this file as part of a program or library that
  17 is built using GNU Libtool, you may include this file under the
  18 same distribution terms that you use for the rest of that program.
  19 
  20 GNU Libltdl is distributed in the hope that it will be useful,
  21 but WITHOUT ANY WARRANTY; without even the implied warranty of
  22 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  23 GNU Lesser General Public License for more details.
  24 
  25 You should have received a copy of the GNU Lesser General Public
  26 License along with GNU Libltdl; see the file COPYING.LIB.  If not, a
  27 copy can be downloaded from  http://www.gnu.org/licenses/lgpl.html,
  28 or obtained by writing to the Free Software Foundation, Inc.,
  29 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  30 */
  31 
  32 #include <assert.h>
  33 #include <string.h>
  34 
  35 #include "lt__strl.h"
  36 
  37 /*
  38  lt_strlcat appends the NULL-terminated string src to the end of dst.
  39  It will append at most dstsize - strlen(dst) - 1 bytes,
  40  NULL-terminating the result. The total length of the string that
  41  would have been created given sufficient buffer size (may be longer
  42  than dstsize) is returned.  This function substitutes for strlcat(),
  43  which is available under NetBSD, FreeBSD and Solaris 9.
  44 
  45  Buffer overflow can be checked as follows:
  46 
  47    if (lt_strlcat(dst, src, dstsize) >= dstsize)
  48      return -1;
  49 */
  50 #if !defined HAVE_STRLCAT
  51 size_t
  52 lt_strlcat(char *dst, const char *src, const size_t dstsize)
     /*  */
  53 {
  54   size_t length;
  55   char *p;
  56   const char *q;
  57 
  58   assert(dst != NULL);
  59   assert(src != (const char *) NULL);
  60   assert(dstsize >= 1);
  61 
  62   length=strlen(dst);
  63 
  64   /*
  65     Copy remaining characters from src while constraining length to
  66     size - 1.
  67   */
  68   for ( p = dst + length, q = src;
  69         (*q != 0) && (length < dstsize - 1);
  70         length++, p++, q++ )
  71     *p = *q;
  72 
  73   dst[length]='\0';
  74 
  75   /*
  76     Add remaining length of src to length.
  77   */
  78   while (*q++)
  79     length++;
  80 
  81   return length;
  82 }
  83 #endif /* !defined HAVE_STRLCAT */
  84 
  85 /*
  86   lt_strlcpy copies up to dstsize - 1 characters from the NULL-terminated
  87   string src to dst, NULL-terminating the result. The total length of
  88   the string that would have been created given sufficient buffer
  89   size (may be longer than dstsize) is returned. This function
  90   substitutes for strlcpy(), which is available under OpenBSD, FreeBSD
  91   and Solaris 9.
  92 
  93   Buffer overflow can be checked as  follows:
  94 
  95     if (lt_strlcpy(dst, src, dstsize) >= dstsize)
  96       return -1;
  97 */
  98 #if !defined HAVE_STRLCPY
  99 size_t
 100 lt_strlcpy(char *dst, const char *src, const size_t dstsize)
     /*  */
 101 {
 102   size_t length=0;
 103   char *p;
 104   const char *q;
 105 
 106   assert(dst != NULL);
 107   assert(src != (const char *) NULL);
 108   assert(dstsize >= 1);
 109 
 110   /*
 111     Copy src to dst within bounds of size-1.
 112   */
 113   for ( p=dst, q=src, length=0;
 114         (*q != 0) && (length < dstsize-1);
 115         length++, p++, q++ )
 116     *p = *q;
 117 
 118   dst[length]='\0';
 119 
 120   /*
 121     Add remaining length of src to length.
 122   */
 123   while (*q++)
 124     length++;
 125 
 126   return length;
 127 }
 128 #endif /* !defined HAVE_STRLCPY */
/* */
root/libltdl/lt__strl.c

DEFINITIONS
