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11  *                                                                          *
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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 
38 MODULE_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 
43 static 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  */
89 NCURSES_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  */
101 NCURSES_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