how to use a gchar ** variable in gtk+

Carunkumar · 12-20-2007, 12:00 PM

I have a function that returns an argument of type gchar**. I need to get the strings.

I thought the strings would be terminated by a NULL and used a simple code to display the strings..

Code:

gchar **o;

..
..

gint i = 0;
while(o[i] != NULL)
{
       g_print("%s",output[i]);
       i++;
}

I get segmentation fault after the last string gets displayed.. how should I deal with it??

kotnik · 12-20-2007, 03:33 PM

Strings are \0-terminated.

MicahCarrick · 12-26-2007, 04:08 PM

Are you referring to a function like g_strsplit() in which the array of strings is terminated with NULL? If so, then your only problem is that you're using o and output... two different variables.

Try this:

Code:

#include <gtk/gtk.h>

int main()
{

    gchar** o = g_strsplit ("apple:orange:bananna",":",-1);
    gint i=0;
    
    while(o[i] != NULL)
    {
           g_print("%s\n",o[i]);
           i++;
    }
    
    return 0;
}

If you compile that and run it, you should get three lines printed, "apple", "orange", and "bananna".

Carunkumar · 02-15-2008, 08:57 AM

Thank you.. I used the same variable name only. By mistake I posted o and output. Reason for getting a segmentation fault is I was trying to use it on the value returned by g_spawn_command_line_snyc() which was not an array of null terminated strings. Seeing the type of the contents of child's stdout, I thought it to be an array of null terminated strings.