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#include "fitz.h"
#include "mupdf.h"
static fz_obj *
pdf_lookup_name_imp(fz_obj *node, fz_obj *needle)
{
fz_obj *kids = fz_dict_gets(node, "Kids");
fz_obj *names = fz_dict_gets(node, "Names");
if (fz_is_array(kids))
{
int l = 0;
int r = fz_array_len(kids) - 1;
while (l <= r)
{
int m = (l + r) >> 1;
fz_obj *kid = fz_array_get(kids, m);
fz_obj *limits = fz_dict_gets(kid, "Limits");
fz_obj *first = fz_array_get(limits, 0);
fz_obj *last = fz_array_get(limits, 1);
if (fz_objcmp(needle, first) < 0)
r = m - 1;
else if (fz_objcmp(needle, last) > 0)
l = m + 1;
else
return pdf_lookup_name_imp(kid, needle);
}
}
if (fz_is_array(names))
{
int l = 0;
int r = (fz_array_len(names) / 2) - 1;
while (l <= r)
{
int m = (l + r) >> 1;
int c;
fz_obj *key = fz_array_get(names, m * 2);
fz_obj *val = fz_array_get(names, m * 2 + 1);
c = fz_objcmp(needle, key);
if (c < 0)
r = m - 1;
else if (c > 0)
l = m + 1;
else
return val;
}
}
return NULL;
}
fz_obj *
pdf_lookup_name(pdf_xref *xref, char *which, fz_obj *needle)
{
fz_obj *root = fz_dict_gets(xref->trailer, "Root");
fz_obj *names = fz_dict_gets(root, "Names");
fz_obj *tree = fz_dict_gets(names, which);
return pdf_lookup_name_imp(tree, needle);
}
fz_obj *
pdf_lookup_dest(pdf_xref *xref, fz_obj *needle)
{
fz_obj *root = fz_dict_gets(xref->trailer, "Root");
fz_obj *dests = fz_dict_gets(root, "Dests");
fz_obj *names = fz_dict_gets(root, "Names");
fz_obj *dest = NULL;
/* PDF 1.1 has destinations in a dictionary */
if (dests)
{
if (fz_is_name(needle))
return fz_dict_get(dests, needle);
else
return fz_dict_gets(dests, fz_to_str_buf(needle));
}
/* PDF 1.2 has destinations in a name tree */
if (names && !dest)
{
fz_obj *tree = fz_dict_gets(names, "Dests");
return pdf_lookup_name_imp(tree, needle);
}
return NULL;
}
static void
pdf_load_name_tree_imp(fz_obj *dict, pdf_xref *xref, fz_obj *node)
{
fz_obj *kids = fz_dict_gets(node, "Kids");
fz_obj *names = fz_dict_gets(node, "Names");
int i;
if (kids)
{
for (i = 0; i < fz_array_len(kids); i++)
pdf_load_name_tree_imp(dict, xref, fz_array_get(kids, i));
}
if (names)
{
for (i = 0; i + 1 < fz_array_len(names); i += 2)
{
fz_obj *key = fz_array_get(names, i);
fz_obj *val = fz_array_get(names, i + 1);
if (fz_is_string(key))
{
key = pdf_to_utf8_name(key);
fz_dict_put(dict, key, val);
fz_drop_obj(key);
}
else if (fz_is_name(key))
{
fz_dict_put(dict, key, val);
}
}
}
}
fz_obj *
pdf_load_name_tree(pdf_xref *xref, char *which)
{
fz_obj *root = fz_dict_gets(xref->trailer, "Root");
fz_obj *names = fz_dict_gets(root, "Names");
fz_obj *tree = fz_dict_gets(names, which);
if (fz_is_dict(tree))
{
fz_obj *dict = fz_new_dict(100);
pdf_load_name_tree_imp(dict, xref, tree);
return dict;
}
return NULL;
}
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