librb/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 <librb_config.h>
  37 #include <rb_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 /*
 206  * rb_snprintf_append()
 207  * appends snprintf formatted string to the end of the buffer but not
 208  * exceeding len
 209  */
 210 int
 211 rb_snprintf_append(char *str, size_t len, const char *format, ...)
 212 {
 213         if(len == 0)
 214                 return 0;
 215
 216         size_t x = strlen(str);
 217
 218         if(len < x)
 219         {
 220                 str[len - 1] = '\0';
 221                 return (int)len - 1;
 222         }
 223
 224         va_list ap;
 225         va_start(ap, format);
 226         int y = (vsnprintf(str + x, len - x, format, ap) + (int)x);
 227         va_end(ap);
 228
 229         return (y);
 230 }
 231
 232 /* rb_basename
 233  *
 234  * input        -
 235  * output       -
 236  * side effects -
 237  */
 238 char *
 239 rb_basename(const char *path)
 240 {
 241         const char *s;
 242
 243         if(!(s = strrchr(path, '/')))
 244                 s = path;
 245         else
 246                 s++;
 247         return rb_strdup(s);
 248 }
 249
 250 /*
 251  * rb_dirname
 252  */
 253
 254 char *
 255 rb_dirname (const char *path)
 256 {
 257         char *s;
 258
 259         s = strrchr(path, '/');
 260         if(s == NULL)
 261         {
 262                 return rb_strdup(".");
 263         }
 264
 265         /* remove extra slashes */
 266         while(s > path && *s == '/')
 267                 --s;
 268
 269         return rb_strndup(path, ((uintptr_t)s - (uintptr_t)path) + 2);
 270 }
 271
 272 size_t rb_zstring_serialized(rb_zstring_t *zs, void **buf, size_t *buflen)
 273 {
 274         uint8_t *p;
 275         size_t alloclen = sizeof(uint16_t) + zs->len;
 276
 277         p = rb_malloc(sizeof(alloclen));
 278         memcpy(p, &zs->len, sizeof(uint16_t));
 279         p += sizeof(uint16_t);
 280         memcpy(p, zs->data, zs->len);
 281         return alloclen;
 282 }
 283
 284 size_t rb_zstring_deserialize(rb_zstring_t *zs, void *buf)
 285 {
 286         uint8_t *p = (uint8_t *)buf;
 287
 288         memcpy(&zs->len, p, sizeof(uint16_t));
 289         p += sizeof(uint16_t);
 290         if(zs->len == 0)
 291         {
 292                 zs->data = NULL;
 293                 return sizeof(uint16_t);
 294         }
 295         zs->data = rb_malloc(zs->len);
 296         memcpy(zs->data, p, zs->len);
 297         return zs->len + sizeof(uint16_t);
 298 }
 299
 300 void rb_zstring_free(rb_zstring_t *zs)
 301 {
 302         rb_free(zs->data);
 303         rb_free(zs);
 304
 305 }
 306
 307 rb_zstring_t *rb_zstring_alloc(void)
 308 {
 309         rb_zstring_t *zs = rb_malloc(sizeof(rb_zstring_t));
 310         return zs;
 311 }
 312
 313 rb_zstring_t *rb_zstring_from_c_len(const char *buf, size_t len)
 314 {
 315         rb_zstring_t *zs;
 316
 317         if(len > UINT16_MAX-1)
 318                 return NULL;
 319
 320         zs = rb_zstring_alloc();
 321         zs->alloclen = zs->len = (uint16_t)len;
 322         zs->alloclen = (uint16_t)len;
 323         if(zs->alloclen < 128)
 324                 zs->alloclen = 128;
 325         zs->data = rb_malloc(zs->alloclen);
 326         memcpy(zs->data, buf, zs->len);
 327         return(zs);
 328 }
 329
 330 rb_zstring_t *rb_zstring_from_c(const char *buf)
 331 {
 332         return rb_zstring_from_c_len(buf, strlen(buf));
 333 }
 334
 335 size_t rb_zstring_len(rb_zstring_t *zs)
 336 {
 337         return zs->len;
 338 }
 339
 340 void rb_zstring_append_from_zstring(rb_zstring_t *dst_zs, rb_zstring_t *src_zs)
 341 {
 342         void *ep;
 343         size_t nlen = dst_zs->len + src_zs->len;
 344
 345         if(nlen > dst_zs->alloclen)
 346         {
 347                 dst_zs->alloclen += src_zs->len + 64;
 348                 dst_zs->data = rb_realloc(dst_zs->data, dst_zs->alloclen);
 349         }
 350
 351         ep = dst_zs->data + dst_zs->len;
 352         memcpy(ep, src_zs->data, src_zs->len);
 353 }
 354
 355 void rb_zstring_append_from_c(rb_zstring_t *zs, const char *buf, size_t len)
 356 {
 357         void *ep;
 358         size_t nlen = zs->len + len;
 359
 360         if(nlen > zs->alloclen)
 361         {
 362                 zs->alloclen += len + 64;
 363                 zs->data = rb_realloc(zs->data, zs->alloclen);
 364         }
 365         ep = zs->data + zs->len;
 366         zs->len += len;
 367         memcpy(ep, buf, len);
 368 }
 369
 370 char *rb_zstring_to_c(rb_zstring_t *zs, char *buf, size_t len)
 371 {
 372         size_t cpylen;
 373         if(len < zs->len)
 374                 cpylen = len - 1;
 375         else
 376                 cpylen = zs->len;
 377         buf[cpylen] = '\0';
 378         memcpy(buf, zs->data, cpylen);
 379         return buf;
 380 }
 381
 382
 383 char *rb_zstring_to_c_alloc(rb_zstring_t *zs)
 384 {
 385         char *p;
 386         p = rb_malloc(zs->len+1);
 387         memcpy(p, zs->data, zs->len);
 388         return p;
 389 }
 390
 391 size_t rb_zstring_to_ptr(rb_zstring_t *zs, void **ptr)
 392 {
 393         *ptr = (void *)zs->data;
 394         return zs->len;
 395 }