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      1 /*
      2 
      3 Copyright 1989, 1998  The Open Group
      4 
      5 Permission to use, copy, modify, distribute, and sell this software and its
      6 documentation for any purpose is hereby granted without fee, provided that
      7 the above copyright notice appear in all copies and that both that
      8 copyright notice and this permission notice appear in supporting
      9 documentation.
     10 
     11 The above copyright notice and this permission notice shall be included in
     12 all copies or substantial portions of the Software.
     13 
     14 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     15 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     16 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
     17 OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
     18 AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
     19 CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
     20 
     21 Except as contained in this notice, the name of The Open Group shall not be
     22 used in advertising or otherwise to promote the sale, use or other dealings
     23 in 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 #include "reallocarray.h"
     35 
     36 /*
     37  * XTextPropertyToStringList - set list and count to contain data stored in
     38  * null-separated STRING property.
     39  */
     40 
     41 Status 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 = Xmallocarray (nelements, sizeof (char *));
     76     if (!list) return False;
     77 
     78     start = Xmalloc ((datalen + 1) * sizeof (char));	/* for <NUL> */
     79     if (!start) {
     80 	Xfree (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 
    110 void XFreeStringList (char **list)
    111 {
    112     if (list) {
    113 	if (list[0]) Xfree (list[0]);
    114 	Xfree (list);
    115 	list = NULL;
    116     }
    117 }
    118 
    119