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#include "xproperty.h"
#include "docker.h"
gboolean xprop_get8(Window window, Atom atom, Atom type, int size,
gulong *count, guchar **value)
{
Atom ret_type;
int ret_size;
unsigned long ret_bytes;
int result;
unsigned long nelements = *count;
unsigned long maxread = nelements;
*value = NULL;
/* try get the first element */
result = XGetWindowProperty(display, window, atom, 0l, 1l, False,
AnyPropertyType, &ret_type, &ret_size,
&nelements, &ret_bytes, value);
if (! (result == Success && ret_type == type &&
ret_size == size && nelements > 0)) {
if (*value) XFree(*value);
*value = NULL;
nelements = 0;
} else {
/* we didn't the whole property's value, more to get */
if (! (ret_bytes == 0 || maxread <= nelements)) {
int remain;
/* get the entire property since it is larger than one element long */
XFree(*value);
/*
the number of longs that need to be retreived to get the property's
entire value. The last + 1 is the first long that we retrieved above.
*/
remain = (ret_bytes - 1)/sizeof(long) + 1 + 1;
/* dont get more than the max */
if (remain > size/8 * (signed)maxread)
remain = size/8 * (signed)maxread;
result = XGetWindowProperty(display, window, atom, 0l, remain,
False, type, &ret_type, &ret_size,
&nelements, &ret_bytes, value);
/*
If the property has changed type/size, or has grown since our first
read of it, then stop here and try again. If it shrank, then this will
still work.
*/
if (!(result == Success && ret_type == type &&
ret_size == size && ret_bytes == 0)) {
if (*value) XFree(*value);
xprop_get8(window, atom, type, size, count, value);
}
}
}
*count = nelements;
return *value != NULL;
}
gboolean xprop_get32(Window window, Atom atom, Atom type, int size,
gulong *count, gulong **value)
{
return xprop_get8(window, atom, type, size, count, (guchar**)value);
}
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