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, 2009-2025 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 file is free software: you can redistribute it and/or modify
   9    it under the terms of the GNU Lesser General Public License as
  10    published by the Free Software Foundation; either version 2.1 of the
  11    License, or (at your option) any later version.
  12
  13    This file 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 Lesser General Public License for more details.
  17
  18    You should have received a copy of the GNU Lesser 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