static void sweepobj(fz_obj *obj)
{
int i;
if (fz_is_indirect(obj))
sweepref(obj);
else if (fz_is_dict(ctx, obj))
for (i = 0; i < fz_dict_len(ctx, obj); i++)
sweepobj(fz_dict_get_val(ctx, obj, i));
else if (fz_is_array(ctx, obj))
for (i = 0; i < fz_array_len(ctx, obj); i++)
sweepobj(fz_array_get(ctx, obj, i));
}
fz_obj *
fz_copy_dict(fz_context *ctx, fz_obj *obj)
{
fz_obj *dict;
int i, n;
RESOLVE(obj);
if (obj && obj->kind != FZ_DICT)
fz_warn(ctx, "assert: not a dict (%s)", fz_objkindstr(obj));
n = fz_dict_len(obj);
dict = fz_new_dict(ctx, n);
for (i = 0; i < n; i++)
fz_dict_put(dict, fz_dict_get_key(obj, i), fz_dict_get_val(obj, i));
return dict;
}
static void renumberobj(fz_obj *obj)
{
int i;
fz_context *ctx = xref->ctx;
if (fz_is_dict(obj))
{
int n = fz_dict_len(obj);
for (i = 0; i < n; i++)
{
fz_obj *key = fz_dict_get_key(obj, i);
fz_obj *val = fz_dict_get_val(obj, i);
if (fz_is_indirect(val))
{
val = fz_new_indirect(ctx, renumbermap[fz_to_num(val)], 0, xref);
fz_dict_put(obj, key, val);
fz_drop_obj(val);
}
else
{
renumberobj(val);
}
}
}
else if (fz_is_array(obj))
{
int n = fz_array_len(obj);
for (i = 0; i < n; i++)
{
fz_obj *val = fz_array_get(obj, i);
if (fz_is_indirect(val))
{
val = fz_new_indirect(ctx, renumbermap[fz_to_num(val)], 0, xref);
fz_array_put(obj, i, val);
fz_drop_obj(val);
}
else
{
renumberobj(val);
}
}
}
}
static void sweepobj(fz_obj *obj)
{
int i;
if (fz_is_indirect(obj))
sweepref(obj);
else if (fz_is_dict(obj))
{
int n = fz_dict_len(obj);
for (i = 0; i < n; i++)
sweepobj(fz_dict_get_val(obj, i));
}
else if (fz_is_array(obj))
{
int n = fz_array_len(obj);
for (i = 0; i < n; i++)
sweepobj(fz_array_get(obj, i));
}
}
static void retainpages(int argc, char **argv)
{
fz_obj *oldroot, *root, *pages, *kids, *countobj, *parent, *olddests;
/* Keep only pages/type and (reduced) dest entries to avoid
* references to unretained pages */
oldroot = fz_dict_gets(xref->trailer, "Root");
pages = fz_dict_gets(oldroot, "Pages");
olddests = pdf_load_name_tree(xref, "Dests");
root = fz_new_dict(ctx, 2);
fz_dict_puts(root, "Type", fz_dict_gets(oldroot, "Type"));
fz_dict_puts(root, "Pages", fz_dict_gets(oldroot, "Pages"));
pdf_update_object(xref, fz_to_num(oldroot), fz_to_gen(oldroot), root);
fz_drop_obj(root);
/* Create a new kids array with only the pages we want to keep */
parent = fz_new_indirect(ctx, fz_to_num(pages), fz_to_gen(pages), xref);
kids = fz_new_array(ctx, 1);
/* Retain pages specified */
while (argc - fz_optind)
{
int page, spage, epage;
char *spec, *dash;
char *pagelist = argv[fz_optind];
spec = fz_strsep(&pagelist, ",");
while (spec)
{
dash = strchr(spec, '-');
if (dash == spec)
spage = epage = pdf_count_pages(xref);
else
spage = epage = atoi(spec);
if (dash)
{
if (strlen(dash) > 1)
epage = atoi(dash + 1);
else
epage = pdf_count_pages(xref);
}
if (spage > epage)
page = spage, spage = epage, epage = page;
if (spage < 1)
spage = 1;
if (epage > pdf_count_pages(xref))
epage = pdf_count_pages(xref);
for (page = spage; page <= epage; page++)
{
fz_obj *pageobj = xref->page_objs[page-1];
fz_obj *pageref = xref->page_refs[page-1];
fz_dict_puts(pageobj, "Parent", parent);
/* Store page object in new kids array */
fz_array_push(kids, pageref);
}
spec = fz_strsep(&pagelist, ",");
}
fz_optind++;
}
fz_drop_obj(parent);
/* Update page count and kids array */
countobj = fz_new_int(ctx, fz_array_len(kids));
fz_dict_puts(pages, "Count", countobj);
fz_drop_obj(countobj);
fz_dict_puts(pages, "Kids", kids);
fz_drop_obj(kids);
/* Also preserve the (partial) Dests name tree */
if (olddests)
{
int i;
fz_obj *names = fz_new_dict(ctx, 1);
fz_obj *dests = fz_new_dict(ctx, 1);
fz_obj *names_list = fz_new_array(ctx, 32);
for (i = 0; i < fz_dict_len(olddests); i++)
{
fz_obj *key = fz_dict_get_key(olddests, i);
fz_obj *val = fz_dict_get_val(olddests, i);
fz_obj *key_str = fz_new_string(ctx, fz_to_name(key), strlen(fz_to_name(key)));
fz_obj *dest = fz_dict_gets(val, "D");
dest = fz_array_get(dest ? dest : val, 0);
if (fz_array_contains(fz_dict_gets(pages, "Kids"), dest))
{
fz_array_push(names_list, key_str);
fz_array_push(names_list, val);
}
fz_drop_obj(key_str);
}
root = fz_dict_gets(xref->trailer, "Root");
fz_dict_puts(dests, "Names", names_list);
fz_dict_puts(names, "Dests", dests);
fz_dict_puts(root, "Names", names);
fz_drop_obj(names);
fz_drop_obj(dests);
fz_drop_obj(names_list);
fz_drop_obj(olddests);
}
}