src/lib/string.c

   1 /************************************************************************
   2 * string.c
   3 * voxelands - 3d voxel world sandbox game
   4 * Copyright (C) Lisa 'darkrose' Milne 2016 <lisa@ltmnet.com>
   5 *
   6 * This program is free software: you can redistribute it and/or modify
   7 * it under the terms of the GNU General Public License as published by
   8 * the Free Software Foundation, either version 3 of the License, or
   9 * (at your option) any later version.
  10 *
  11 * This program is distributed in the hope that it will be useful, but
  12 * WITHOUT ANY WARRANTY; without even the implied warranty of
  13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  14 * See the GNU General Public License for more details.
  15 *
  16 * You should have received a copy of the GNU General Public License
  17 * along with this program.  If not, see <http://www.gnu.org/licenses/>
  18 ************************************************************************/
  19
  20 #include "common.h"
  21
  22 #include <stdlib.h>
  23 #include <string.h>
  24 #include <ctype.h>
  25
  26 /* remove whitespace from beginning and end of a string */
  27 /* TODO: utf8 support? */
  28 char* trim(char* str)
  29 {
  30         int l;
  31
  32         while (*str && isspace(*str)) {
  33                 str++;
  34         }
  35
  36         l = strlen(str);
  37         while (--l > -1 && (!str[l] || isspace(str[l]))) {
  38                 str[l] = 0;
  39         }
  40
  41         return str;
  42 }
  43
  44 /* allocate memory and copy a string */
  45 char* strdup(const char* str)
  46 {
  47         char* r;
  48         int l;
  49
  50         if (!str)
  51                 return NULL;
  52
  53         l = strlen(str);
  54         l++;
  55
  56         r = malloc(l);
  57         if (!r)
  58                 return NULL;
  59
  60         if (!memcpy(r,str,l)) {
  61                 free(r);
  62                 return NULL;
  63         }
  64
  65         return r;
  66 }