TextToStr.c revision eb411b4b 
1/*
2
3Copyright 1989, 1998  The Open Group
4
5Permission to use, copy, modify, distribute, and sell this software and its
6documentation for any purpose is hereby granted without fee, provided that
7the above copyright notice appear in all copies and that both that
8copyright notice and this permission notice appear in supporting
9documentation.
10
11The above copyright notice and this permission notice shall be included in
12all copies or substantial portions of the Software.
13
14THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
17OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
18AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
19CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
20
21Except as contained in this notice, the name of The Open Group shall not be
22used in advertising or otherwise to promote the sale, use or other dealings
23in this Software without prior written authorization from The Open Group.
24
25*/
26
27
28#ifdef HAVE_CONFIG_H
29#include <config.h>
30#endif
31#include <X11/Xlibint.h>
32#include <X11/Xatom.h>
33#include <X11/Xutil.h>
34
35
36/*
37 * XTextPropertyToStringList - set list and count to contain data stored in
38 * null-separated STRING property.
39 */
40
41Status XTextPropertyToStringList (
42    XTextProperty *tp,
43    char ***list_return,
44    int *count_return)
45{
46    char **list;			/* return value */
47    int nelements;			/* return value */
48    register char *cp;			/* temp variable */
49    char *start;			/* start of thing to copy */
50    int i, j;				/* iterator variables */
51    int datalen = (int) tp->nitems;	/* for convenience */
52
53    /*
54     * make sure we understand how to do it
55     */
56    if (tp->encoding != XA_STRING ||  tp->format != 8) return False;
57
58    if (datalen == 0) {
59	*list_return = NULL;
60	*count_return = 0;
61	return True;
62    }
63
64    /*
65     * walk the list to figure out how many elements there are
66     */
67    nelements = 1;			/* since null-separated */
68    for (cp = (char *) tp->value, i = datalen; i > 0; cp++, i--) {
69	if (*cp == '\0') nelements++;
70    }
71
72    /*
73     * allocate list and duplicate
74     */
75    list = Xmalloc (nelements * sizeof (char *));
76    if (!list) return False;
77
78    start = Xmalloc ((datalen + 1) * sizeof (char));	/* for <NUL> */
79    if (!start) {
80	Xfree ((char *) list);
81	return False;
82    }
83
84    /*
85     * copy data
86     */
87    memcpy (start, (char *) tp->value, tp->nitems);
88    start[datalen] = '\0';
89
90    /*
91     * walk down list setting value
92     */
93    for (cp = start, i = datalen + 1, j = 0; i > 0; cp++, i--) {
94	if (*cp == '\0') {
95	    list[j] = start;
96	    start = (cp + 1);
97	    j++;
98	}
99    }
100
101    /*
102     * append final null pointer and then return data
103     */
104    *list_return = list;
105    *count_return = nelements;
106    return True;
107}
108
109
110void XFreeStringList (char **list)
111{
112    if (list) {
113	if (list[0]) Xfree (list[0]);
114	Xfree ((char *) list);
115	list = NULL;
116    }
117}
118
119