| /* Implement string-related runtime actions for CHILL. |
| Copyright (C) 1992,1993 Free Software Foundation, Inc. |
| Author: Bill Cox |
| |
| This file is part of GNU CC. |
| |
| GNU CC 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, or (at your option) |
| any later version. |
| |
| GNU CC 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 GNU CC; see the file COPYING. If not, write to |
| the Free Software Foundation, 59 Temple Place - Suite 330, |
| Boston, MA 02111-1307, USA. */ |
| |
| /* As a special exception, if you link this library with other files, |
| some of which are compiled with GCC, to produce an executable, |
| this library does not by itself cause the resulting executable |
| to be covered by the GNU General Public License. |
| This exception does not however invalidate any other reasons why |
| the executable file might be covered by the GNU General Public License. */ |
| |
| #define MIN(a, b) ((a) < (b) ? (a) : (b)) |
| |
| |
| /* |
| * function memmove |
| * |
| * parameters: |
| * S1 - pointer to destination string |
| * S2 - pointer to source string |
| * LEN - length of string |
| * |
| * returns: |
| * pointer to destination string |
| * |
| * exceptions: |
| * none |
| * |
| * abstract: |
| * copies a string safely, where the source and dest areas may overlap. |
| * |
| */ |
| |
| void * |
| memmove (s1, s2, n) |
| void *s1; |
| const void *s2; |
| int n; |
| { |
| char *sc1 = s1; |
| const char *sc2 = s2; |
| |
| if (sc2 < sc1 && (sc1 < sc2 + n)) |
| for (sc1 += n, sc2 += n; 0 < n; --n) |
| *--sc1 = *--sc2; |
| else |
| #if 0 |
| for (; 0 < n; --n) |
| *sc1++ = *sc2++; |
| #else |
| memcpy (sc1, sc2, n); |
| #endif |
| return s1; |
| } |