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// Copyright (C) 2022 Artifex Software, Inc.
//
// This file is part of MuPDF.
//
// MuPDF is free software: you can redistribute it and/or modify it under the
// terms of the GNU Affero General Public License as published by the Free
// Software Foundation, either version 3 of the License, or (at your option)
// any later version.
//
// MuPDF is distributed in the hope that it will be useful, but WITHOUT ANY
// WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
// FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
// details.
//
// You should have received a copy of the GNU Affero General Public License
// along with MuPDF. If not, see <https://www.gnu.org/licenses/agpl-3.0.en.html>
//
// Alternative licensing terms are available from the licensor.
// For commercial licensing, see <https://www.artifex.com/> or contact
// Artifex Software, Inc., 39 Mesa Street, Suite 108A, San Francisco,
// CA 94129, USA, for further information.
#ifndef XML_IMP_H
#define XML_IMP_H
#include "mupdf/fitz.h"
/* These types are required for basic XML operation. */
struct attribute
{
char *value;
struct attribute *next;
char name[1];
};
/**
We use a slightly grotty representation for an XML tree.
The topmost element of the tree is an fz_xml with up == NULL.
This signifies that we are a 'doc', rather than a 'node'.
We only ever get a 'doc' node at the root, and this contains
a reference count for the entire tree, together with the
fz_pool pointer used to allocate nodes.
All other structures are 'nodes'. If down is MAGIC_TEXT then
they are text nodes (with no children or attributes).
Otherwise, they are standard XML nodes with attributes
and children.
*/
struct fz_xml
{
fz_xml *up, *down;
union
{
struct /* up != NULL */
{
fz_xml *prev, *next;
#ifdef FZ_XML_SEQ
int seq;
#endif
union
{
char text[1]; /* down == MAGIC_TEXT */
struct /* down != MAGIC_TEXT */
{
struct attribute *atts;
char name[1];
} d;
} u;
} node;
struct /* up == NULL */
{
int refs;
fz_pool *pool;
} doc;
} u;
};
#define MAGIC_TEXT ((fz_xml *)1)
#define FZ_TEXT_ITEM(item) (item && item->down == MAGIC_TEXT)
#define FZ_DOCUMENT_ITEM(item) (item && item->up == NULL)
size_t xml_parse_entity(int *c, const char *a);
#endif
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