1/****************************************************************************
2 * Copyright (c) 1998,2000 Free Software Foundation, Inc.                   *
3 *                                                                          *
4 * Permission is hereby granted, free of charge, to any person obtaining a  *
5 * copy of this software and associated documentation files (the            *
6 * "Software"), to deal in the Software without restriction, including      *
7 * without limitation the rights to use, copy, modify, merge, publish,      *
8 * distribute, distribute with modifications, sublicense, and/or sell       *
9 * copies of the Software, and to permit persons to whom the Software is    *
10 * furnished to do so, subject to the following conditions:                 *
11 *                                                                          *
12 * The above copyright notice and this permission notice shall be included  *
13 * in all copies or substantial portions of the Software.                   *
14 *                                                                          *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
16 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
18 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
19 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
20 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
21 * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
22 *                                                                          *
23 * Except as contained in this notice, the name(s) of the above copyright   *
24 * holders shall not be used in advertising or otherwise to promote the     *
25 * sale, use or other dealings in this Software without prior written       *
26 * authorization.                                                           *
27 ****************************************************************************/
28
29/****************************************************************************
30 *  Author: Thomas E. Dickey <dickey@clark.net> 1998                        *
31 ****************************************************************************/
32
33/*
34 * Wrapper for malloc/realloc.  Standard implementations allow realloc with
35 * a null pointer, but older libraries may not (e.g., SunOS).
36 *
37 * Also if realloc fails, we discard the old memory to avoid leaks.
38 */
39
40#include <curses.priv.h>
41
42MODULE_ID("$Id: doalloc.c,v 1.8 2002/08/31 21:48:11 Philippe.Blain Exp $")
43
44NCURSES_EXPORT(void *)
45_nc_doalloc(void *oldp, size_t amount)
46{
47    void *newp;
48
49    if (oldp != 0) {
50	if ((newp = realloc(oldp, amount)) == 0) {
51	    free(oldp);
52	    errno = ENOMEM;	/* just in case 'free' reset */
53	}
54    } else {
55	newp = malloc(amount);
56    }
57    return newp;
58}
59
60#if !HAVE_STRDUP
61NCURSES_EXPORT(char *)
62_nc_strdup(const char *src)
63{
64    char *dst;
65    if (src != 0) {
66	dst = typeMalloc(char, strlen(src) + 1);
67	if (dst != 0) {
68	    (void) strcpy(dst, src);
69	}
70    } else {
71	dst = 0;
72    }
73    return dst;
74}
75#endif
76