libratbox/src/tools.c

   1 /*
   2  *  ircd-ratbox: A slightly useful ircd.
   3  *  tools.c: Various functions needed here and there.
   4  *
   5  *  Copyright (C) 1996-2002 Hybrid Development Team
   6  *  Copyright (C) 2002-2005 ircd-ratbox development team
   7  *
   8  *  This program is free software; you can redistribute it and/or modify
   9  *  it under the terms of the GNU General Public License as published by
  10  *  the Free Software Foundation; either version 2 of the License, or
  11  *  (at your option) any later version.
  12  *
  13  *  This program is distributed in the hope that it will be useful,
  14  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  *  GNU General Public License for more details.
  17  *
  18  *  You should have received a copy of the GNU General Public License
  19  *  along with this program; if not, write to the Free Software
  20  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
  21  *  USA
  22  *
  23  *  $Id: tools.c 26170 2008-10-26 20:59:07Z androsyn $
  24  *
  25  *  Here is the original header:
  26  *
  27  *  Useful stuff, ripped from places ..
  28  *  adrian chadd <adrian@creative.net.au>
  29  *
  30  *  The TOOLS_C define builds versions of the functions in tools.h
  31  *  so that they end up in the resulting object files.  If its not
  32  *  defined, tools.h will build inlined versions of the functions
  33  *  on supported compilers
  34  */
  35 #define _GNU_SOURCE 1
  36 #include <libratbox_config.h>
  37 #include <ratbox_lib.h>
  38 #include <rb_tools.h>
  39
  40
  41 /*
  42  * init_rb_dlink_nodes
  43  *
  44  */
  45 static rb_bh *dnode_heap;
  46 void
  47 rb_init_rb_dlink_nodes(size_t dh_size)
  48 {
  49
  50         dnode_heap = rb_bh_create(sizeof(rb_dlink_node), dh_size, "librb_dnode_heap");
  51         if(dnode_heap == NULL)
  52                 rb_outofmemory();
  53 }
  54
  55 /*
  56  * make_rb_dlink_node
  57  *
  58  * inputs       - NONE
  59  * output       - pointer to new rb_dlink_node
  60  * side effects - NONE
  61  */
  62 rb_dlink_node *
  63 rb_make_rb_dlink_node(void)
  64 {
  65         return (rb_bh_alloc(dnode_heap));
  66 }
  67
  68 /*
  69  * free_rb_dlink_node
  70  *
  71  * inputs       - pointer to rb_dlink_node
  72  * output       - NONE
  73  * side effects - free given rb_dlink_node
  74  */
  75 void
  76 rb_free_rb_dlink_node(rb_dlink_node *ptr)
  77 {
  78         assert(ptr != NULL);
  79         rb_bh_free(dnode_heap, ptr);
  80 }
  81
  82 /* rb_string_to_array()
  83  *   Changes a given buffer into an array of parameters.
  84  *   Taken from ircd-ratbox.
  85  *
  86  * inputs       - string to parse, array to put in
  87  * outputs      - number of parameters
  88  */
  89 int
  90 rb_string_to_array(char *string, char **parv, int maxpara)
  91 {
  92         char *p, *xbuf = string;
  93         int x = 0;
  94
  95         parv[x] = NULL;
  96
  97         if(string == NULL || string[0] == '\0')
  98                 return x;
  99
 100         while(*xbuf == ' ')     /* skip leading spaces */
 101                 xbuf++;
 102         if(*xbuf == '\0')       /* ignore all-space args */
 103                 return x;
 104
 105         do
 106         {
 107                 if(*xbuf == ':')        /* Last parameter */
 108                 {
 109                         xbuf++;
 110                         parv[x++] = xbuf;
 111                         parv[x] = NULL;
 112                         return x;
 113                 }
 114                 else
 115                 {
 116                         parv[x++] = xbuf;
 117                         parv[x] = NULL;
 118                         if((p = strchr(xbuf, ' ')) != NULL)
 119                         {
 120                                 *p++ = '\0';
 121                                 xbuf = p;
 122                         }
 123                         else
 124                                 return x;
 125                 }
 126                 while(*xbuf == ' ')
 127                         xbuf++;
 128                 if(*xbuf == '\0')
 129                         return x;
 130         }
 131         while(x < maxpara - 1);
 132
 133         if(*p == ':')
 134                 p++;
 135
 136         parv[x++] = p;
 137         parv[x] = NULL;
 138         return x;
 139 }
 140
 141 #ifndef HAVE_STRLCAT
 142 size_t
 143 rb_strlcat(char *dest, const char *src, size_t count)
 144 {
 145         size_t dsize = strlen(dest);
 146         size_t len = strlen(src);
 147         size_t res = dsize + len;
 148
 149         dest += dsize;
 150         count -= dsize;
 151         if(len >= count)
 152                 len = count - 1;
 153         memcpy(dest, src, len);
 154         dest[len] = 0;
 155         return res;
 156 }
 157 #else
 158 size_t
 159 rb_strlcat(char *dest, const char *src, size_t count)
 160 {
 161         return strlcat(dest, src, count);
 162 }
 163 #endif
 164
 165 #ifndef HAVE_STRLCPY
 166 size_t
 167 rb_strlcpy(char *dest, const char *src, size_t size)
 168 {
 169         size_t ret = strlen(src);
 170
 171         if(size)
 172         {
 173                 size_t len = (ret >= size) ? size - 1 : ret;
 174                 memcpy(dest, src, len);
 175                 dest[len] = '\0';
 176         }
 177         return ret;
 178 }
 179 #else
 180 size_t
 181 rb_strlcpy(char *dest, const char *src, size_t size)
 182 {
 183         return strlcpy(dest, src, size);
 184 }
 185 #endif
 186
 187
 188 #ifndef HAVE_STRNLEN
 189 size_t
 190 rb_strnlen(const char *s, size_t count)
 191 {
 192         const char *sc;
 193         for(sc = s; count-- && *sc != '\0'; ++sc)
 194                 ;;
 195         return sc - s;
 196 }
 197 #else
 198 size_t
 199 rb_strnlen(const char *s, size_t count)
 200 {
 201         return strnlen(s, count);
 202 }
 203 #endif
 204
 205 /* rb_basename
 206  *
 207  * input        -
 208  * output       -
 209  * side effects -
 210  */
 211 char *
 212 rb_basename(const char *path)
 213 {
 214         const char *s;
 215
 216         if(!(s = strrchr(path, '/')))
 217                 s = path;
 218         else
 219                 s++;
 220         return rb_strdup(s);
 221 }
 222
 223 /*
 224  * rb_dirname
 225  */
 226
 227 char *
 228 rb_dirname (const char *path)
 229 {
 230         char *s;
 231
 232         s = strrchr(path, '/');
 233         if(s == NULL)
 234         {
 235                 return rb_strdup(".");
 236         }
 237
 238         /* remove extra slashes */
 239         while(s > path && *s == '/')
 240                 --s;
 241
 242         return rb_strndup(path, ((uintptr_t)s - (uintptr_t)path) + 2);
 243 }