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tetex-bin  3.0
memmove.c
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00001 /****************************************************************************
00002  * Copyright (c) 1998,2000 Free Software Foundation, Inc.                   *
00003  *                                                                          *
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00009  * copies of the Software, and to permit persons to whom the Software is    *
00010  * furnished to do so, subject to the following conditions:                 *
00011  *                                                                          *
00012  * The above copyright notice and this permission notice shall be included  *
00013  * in all copies or substantial portions of the Software.                   *
00014  *                                                                          *
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00022  *                                                                          *
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00028 
00029 #include <curses.priv.h>
00030 
00031 MODULE_ID("$Id: memmove.c,v 1.4 2000/12/10 02:43:28 tom Exp $")
00032 
00033 /****************************************************************************
00034  *  Author: Thomas E. Dickey <dickey@clark.net> 1998                        *
00035  ****************************************************************************/
00036 
00037 #if USE_MY_MEMMOVE
00038 #define DST ((char *)s1)
00039 #define SRC ((const char *)s2)
00040 NCURSES_EXPORT(void *)
00041 _nc_memmove(void *s1, const void *s2, size_t n)
00042 {
00043     if (n != 0) {
00044        if ((DST + n > SRC) && (SRC + n > DST)) {
00045            static char *bfr;
00046            static size_t length;
00047            register size_t j;
00048            if (length < n) {
00049               length = (n * 3) / 2;
00050               bfr = typeRealloc(char, length, bfr);
00051            }
00052            for (j = 0; j < n; j++)
00053               bfr[j] = SRC[j];
00054            SRC = bfr;
00055        }
00056        while (n-- != 0)
00057            DST[n] = SRC[n];
00058     }
00059     return s1;
00060 }
00061 #else
00062 extern
00063 NCURSES_EXPORT(void)
00064 _nc_memmove(void);          /* quiet's gcc warning */
00065 NCURSES_EXPORT(void)
00066 _nc_memmove(void)
00067 {
00068 }                           /* nonempty for strict ANSI compilers */
00069 #endif /* USE_MY_MEMMOVE */