src/glibcompat.c

   1 /* GLIB - Library of useful routines for C programming
   2  * Copyright (C) 1995-1997  Peter Mattis, Spencer Kimball and Josh MacDonald
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the
  16  * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  17  * Boston, MA 02110-1301, USA.
  18  */
  19
  20 /** \file glibcompat.c
  21  *  \brief Source: old glib compatibility
  22  *
  23  *  Following code was copied from glib to GNU Midnight Commander to
  24  *  provide compatibility with older versions of glib.
  25  */
  26
  27 #include <config.h>
  28
  29 #include <string.h>
  30
  31 #include <glib.h>
  32
  33 #include "global.h"
  34 #include "glibcompat.h"
  35
  36 #if GLIB_MAJOR_VERSION < 2
  37
  38 /* Functions g_strlcpy and g_strlcat were originally developed by
  39  * Todd C. Miller <Todd.Miller@courtesan.com> to simplify writing secure code.
  40  * See ftp://ftp.openbsd.org/pub/OpenBSD/src/lib/libc/string/strlcpy.3
  41  * for more information.
  42  */
  43
  44 #ifdef HAVE_STRLCPY
  45 gsize
  46 g_strlcpy (gchar       *dest,
  47            const gchar *src,
  48            gsize        dest_size)
  49 {
  50   g_return_val_if_fail (dest != NULL, 0);
  51   g_return_val_if_fail (src  != NULL, 0);
  52
  53   return strlcpy (dest, src, dest_size);
  54 }
  55
  56 gsize
  57 g_strlcat (gchar       *dest,
  58            const gchar *src,
  59            gsize        dest_size)
  60 {
  61   g_return_val_if_fail (dest != NULL, 0);
  62   g_return_val_if_fail (src  != NULL, 0);
  63
  64   return strlcat (dest, src, dest_size);
  65 }
  66
  67 #else /* ! HAVE_STRLCPY */
  68 /* g_strlcpy
  69  *
  70  * Copy string src to buffer dest (of buffer size dest_size).  At most
  71  * dest_size-1 characters will be copied.  Always NUL terminates
  72  * (unless dest_size == 0).  This function does NOT allocate memory.
  73  * Unlike strncpy, this function doesn't pad dest (so it's often faster).
  74  * Returns size of attempted result, strlen(src),
  75  * so if retval >= dest_size, truncation occurred.
  76  */
  77 gsize
  78 g_strlcpy (gchar       *dest,
  79            const gchar *src,
  80            gsize        dest_size)
  81 {
  82   register gchar *d = dest;
  83   register const gchar *s = src;
  84   register gsize n = dest_size;
  85
  86   g_return_val_if_fail (dest != NULL, 0);
  87   g_return_val_if_fail (src  != NULL, 0);
  88
  89   /* Copy as many bytes as will fit */
  90   if (n != 0 && --n != 0)
  91     do
  92       {
  93         register gchar c = *s++;
  94
  95         *d++ = c;
  96         if (c == 0)
  97           break;
  98       }
  99     while (--n != 0);
 100
 101   /* If not enough room in dest, add NUL and traverse rest of src */
 102   if (n == 0)
 103     {
 104       if (dest_size != 0)
 105         *d = 0;
 106       while (*s++)
 107         ;
 108     }
 109
 110   return s - src - 1;  /* count does not include NUL */
 111 }
 112 #endif /* ! HAVE_STRLCPY */
 113
 114 #endif                          /* GLIB_MAJOR_VERSION < 2 */
 115