1 /****************************************************************************
2  * Copyright (c) 1998 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> 1997                        *
31  ****************************************************************************/
32 /*
33  *	trace_buf.c - Tracing/Debugging buffers (attributes)
34  */
35 
36 #include <curses.priv.h>
37 
38 MODULE_ID("$Id: trace_buf.c,v 1.7 1999/02/27 19:50:58 tom Exp $")
39 
40 typedef struct {
41 	char *text;
42 	size_t size;
43 } LIST;
44 
45 char * _nc_trace_buf(int bufnum, size_t want)
46 {
47 	static LIST *list;
48 	static size_t have;
49 
50 #if NO_LEAKS
51 	if (bufnum < 0) {
52 		if (have) {
53 			while (have--) {
54 				free(list[have].text);
55 			}
56 			free(list);
57 		}
58 		return 0;
59 	}
60 #endif
61 
62 	if ((size_t)(bufnum+1) > have) {
63 		size_t need = (bufnum + 1) * 2;
64 		if ((list = typeRealloc(LIST, need, list)) == 0)
65 			return(0);
66 		while (need > have)
67 			list[have++].text = 0;
68 	}
69 
70 	if (list[bufnum].text == 0
71 	 || want > list[bufnum].size)
72 	{
73 		if ((list[bufnum].text = typeRealloc(char, want, list[bufnum].text)) != 0)
74 			list[bufnum].size = want;
75 	}
76 
77 	if (list[bufnum].text != 0)
78 		*(list[bufnum].text) = '\0';
79 	return list[bufnum].text;
80 }
81