busybox/libbb/strdup_substr.c

33 lines
1.1 KiB
C

/* vi: set sw=4 ts=4: */
/*
* Mini strdup_substr function.
*
* Copyright (C) 2001 Mark Whitley.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/* Return a substring of STR, starting at index START and ending at END,
* allocated on the heap. */
char *strdup_substr(const char *str, int start, int end)
{
int size = end - start + 1;
char *newstr = xmalloc(size);
memcpy(newstr, str+start, size-1);
newstr[size-1] = '\0';
return newstr;
}