#ifndef lint
#ifdef sccs
static char sccsid[] = "@(#)attr_copy.c 1.1 92/07/30 Copyr 1985 Sun Micro";
#endif
#endif
#include <sys/types.h>
#include <sunwindow/attr.h>
/*
* attr_copy: copy an attribute list, returning the size in bytes
*/
int
attr_copy(source, dest)
Attr_attribute **source, **dest;
{
unsigned attr;
unsigned result, size;
size = 0;
do {
attr = **source;
result = copy_1_attr(attr, source, dest);
if (result == -1)
return -1;
size += result;
} while (attr != 0);
return size;
}
static int
copy_1_attr(attr, source, dest)
Attr_attribute attr, **source, **dest;
{
int result, size;
*source += 1;
**dest = attr;
*dest += 1;
size = sizeof attr;
if (attr == 0 || ATTR_BASE_TYPE(attr) == ATTR_BASE_NO_VALUE)
return size;
switch (ATTR_LIST_TYPE(attr)) {
case ATTR_NONE:
result = copy_singleton(attr, source, dest);
break;
case ATTR_NULL:
result = copy_null_list(attr, source, dest);
break;
case ATTR_COUNTED:
result = copy_counted_list(attr, source, dest);
break;
case ATTR_RECURSIVE:
result = attr_copy(source, dest);
break;
default:
return -1;
}
if (result == -1)
return -1;
else
return size + result;
}
static int
copy_counted_list(attr, source, dest)
Attr_attribute attr, **source, **dest;
{
register unsigned count, n;
register Attr_attribute *srcp, *destp;
(void)ATTR_CARDINALITY(attr);
srcp = *source;
destp = *dest;
count = *srcp++;
*destp++ = count;
for (n = count; n--;) {
*destp++ = *srcp++;
}
*source = srcp;
*dest = destp;
return count + 1;
}
static int
copy_singleton(attr, source, dest)
Attr_attribute attr, **source, **dest;
{
register int count, size;
register Attr_attribute *srcp, *destp;
count = ATTR_CARDINALITY(attr);
size = count * 4;
srcp = *source;
destp = *dest;
while (count-- > 0) {
*destp++ = *srcp++;
}
*source = srcp;
*dest = destp;
return size;
}
static int
copy_null_list(attr, source, dest)
Attr_attribute attr, **source, **dest;
{
register int count, size;
register Attr_attribute *srcp, *destp;
count = 0;
size = ATTR_CARDINALITY(attr);
srcp = *source;
destp = *dest;
while (*srcp != 0) {
register int i;
for (i = size; i--;) {
*destp++ = *srcp++;
count++;
}
}
*destp++ = *srcp++;
count++;
*source = srcp;
*dest = destp;
return count * sizeof attr;
}
