lib/stpcpy.c

   1 /* stpcpy.c -- copy a string and return pointer to end of new string
   2    Copyright (C) 1992, 1995, 1997-1998, 2006, 2009-2017 Free Software
   3    Foundation, Inc.
   4
   5    NOTE: The canonical source of this file is maintained with the GNU C Library.
   6    Bugs can be reported to bug-glibc@prep.ai.mit.edu.
   7
   8    This program is free software: you can redistribute it and/or modify it
   9    under the terms of the GNU General Public License as published by the
  10    Free Software Foundation; either version 3 of the License, or any
  11    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, see <https://www.gnu.org/licenses/>.  */
  20
  21 #include <config.h>
  22
  23 #include <string.h>
  24
  25 #undef __stpcpy
  26 #ifdef _LIBC
  27 # undef stpcpy
  28 #endif
  29
  30 #ifndef weak_alias
  31 # define __stpcpy stpcpy
  32 #endif
  33
  34 /* Copy SRC to DEST, returning the address of the terminating '\0' in DEST.  */
  35 char *
  36 __stpcpy (char *dest, const char *src)
  37 {
  38   register char *d = dest;
  39   register const char *s = src;
  40
  41   do
  42     *d++ = *s;
  43   while (*s++ != '\0');
  44
  45   return d - 1;
  46 }
  47 #ifdef weak_alias
  48 weak_alias (__stpcpy, stpcpy)
  49 #endif