1/****************************************************************************
2 * Copyright (c) 1998-2007,2008 Free Software Foundation, Inc.              *
3 *                                                                          *
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5 * copy of this software and associated documentation files (the            *
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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.   *
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22 *                                                                          *
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24 * holders shall not be used in advertising or otherwise to promote the     *
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26 * authorization.                                                           *
27 ****************************************************************************/
28
29/****************************************************************************
30 *  Author: Thomas E. Dickey                 1997-on                        *
31 ****************************************************************************/
32/*
33 *	trace_buf.c - Tracing/Debugging buffers (attributes)
34 */
35
36#include <curses.priv.h>
37
38MODULE_ID("$Id: trace_buf.c,v 1.14 2008/08/03 15:13:56 tom Exp $")
39
40#define MyList _nc_globals.tracebuf_ptr
41#define MySize _nc_globals.tracebuf_used
42
43static char *
44_nc_trace_alloc(int bufnum, size_t want)
45{
46    char *result = 0;
47
48    if (bufnum >= 0) {
49	if ((size_t) (bufnum + 1) > MySize) {
50	    size_t need = (bufnum + 1) * 2;
51	    if ((MyList = typeRealloc(TRACEBUF, need, MyList)) != 0) {
52		while (need > MySize)
53		    MyList[MySize++].text = 0;
54	    }
55	}
56
57	if (MyList != 0) {
58	    if (MyList[bufnum].text == 0
59		|| want > MyList[bufnum].size) {
60		MyList[bufnum].text = typeRealloc(char, want, MyList[bufnum].text);
61		if (MyList[bufnum].text != 0)
62		    MyList[bufnum].size = want;
63	    }
64	    result = MyList[bufnum].text;
65	}
66    }
67#if NO_LEAKS
68    else {
69	if (MySize) {
70	    if (MyList) {
71		while (MySize--) {
72		    if (MyList[MySize].text != 0) {
73			free(MyList[MySize].text);
74		    }
75		}
76		free(MyList);
77		MyList = 0;
78	    }
79	    MySize = 0;
80	}
81    }
82#endif
83    return result;
84}
85
86/*
87 * (re)Allocate a buffer big enough for the caller's wants.
88 */
89NCURSES_EXPORT(char *)
90_nc_trace_buf(int bufnum, size_t want)
91{
92    char *result = _nc_trace_alloc(bufnum, want);
93    if (result != 0)
94	*result = '\0';
95    return result;
96}
97
98/*
99 * Append a new string to an existing buffer.
100 */
101NCURSES_EXPORT(char *)
102_nc_trace_bufcat(int bufnum, const char *value)
103{
104    char *buffer = _nc_trace_alloc(bufnum, 0);
105    if (buffer != 0) {
106	size_t have = strlen(buffer);
107
108	buffer = _nc_trace_alloc(bufnum, 1 + have + strlen(value));
109	if (buffer != 0)
110	    (void) strcpy(buffer + have, value);
111
112    }
113    return buffer;
114}
115