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/*
* Copyright (C) 2020 Linux Studio Plugins Project <https://lsp-plug.in/>
* (C) 2020 Vladimir Sadovnikov <sadko4u@gmail.com>
*
* This file is part of lsp-runtime-lib
* Created on: 24 окт. 2019 г.
*
* lsp-runtime-lib is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* any later version.
*
* lsp-runtime-lib 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with lsp-runtime-lib. If not, see <https://www.gnu.org/licenses/>.
*/
#ifndef LSP_PLUG_IN_FMT_XML_PULLPARSER_H_
#define LSP_PLUG_IN_FMT_XML_PULLPARSER_H_
#include <lsp-plug.in/runtime/version.h>
#include <lsp-plug.in/common/types.h>
#include <lsp-plug.in/io/IInStream.h>
#include <lsp-plug.in/io/IInSequence.h>
#include <lsp-plug.in/io/Path.h>
#include <lsp-plug.in/fmt/xml/const.h>
#include <lsp-plug.in/lltl/parray.h>
namespace lsp
{
namespace xml
{
class PullParser
{
protected:
enum parse_state_t
{
PS_READ_MISC,
PS_READ_ELEMENTS,
PS_READ_ATTRIBUTES,
PS_READ_ELEMENT_DATA,
PS_READ_REFERENCE,
PS_READ_CHARACTERS,
PS_READ_SQ_ATTRIBUTE,
PS_READ_DQ_ATTRIBUTE,
PS_END_DOCUMENT
};
enum xml_flags_t
{
XF_STANDALONE = 1 << 0,
XF_ENCODING = 1 << 1,
XF_VERSION = 1 << 2,
XF_ROOT = 1 << 3,
XF_HEADER = 1 << 4,
XF_DOCTYPE = 1 << 5,
XF_DOCTYPE_SYS = 1 << 6,
XF_DOCTYPE_PUB = 1 << 7,
};
protected:
io::IInSequence *pIn;
size_t nWFlags;
status_t nToken;
parse_state_t nState;
xml_version_t enVersion;
lsp_swchar_t vUngetch[4];
size_t nUngetch;
parse_state_t vStates[4];
size_t nStates;
// Misc data
size_t nFlags; // Field presence
LSPString sVersion; // Document version
LSPString sEncoding; // Document encoding
LSPString sName; // Property/Tag name
LSPString sValue; // Property value
LSPString sRefName; // Reference name
LSPString sDoctype; // Document type
LSPString sSystem; // System literal
LSPString sPublic; // Public literal
lltl::parray<LSPString> vTags;
lltl::parray<LSPString> vAtts;
protected:
static void drop_list(lltl::parray<LSPString> *list);
inline lsp_swchar_t getch();
inline void ungetch(lsp_swchar_t c);
inline void push_state(parse_state_t override);
inline void pop_state();
bool skip_spaces();
status_t check_duplicate_attribute();
status_t read_version();
status_t read_encoding();
status_t read_standalone();
status_t read_text(const char *text);
status_t read_start_document();
status_t read_end_document();
status_t read_name(LSPString *name);
status_t read_attribute_value(lsp_swchar_t qc);
status_t read_header();
status_t read_misc();
status_t read_comment();
status_t read_doctype();
status_t read_tag_open();
status_t read_tag_close(bool copy);
status_t read_tag_attribute();
status_t read_tag_content();
status_t read_processing_instruction();
status_t read_cdata();
status_t read_characters();
status_t read_entity_reference(LSPString *cdata);
status_t read_system_literal(LSPString *dst);
status_t read_pubid_literal(LSPString *dst);
status_t read_token();
public:
explicit PullParser();
virtual ~PullParser();
public:
/**
* Open parser
* @param path UTF-8 path to the file
* @param charset character set
* @return status of operation
*/
status_t open(const char *path, const char *charset = NULL);
/**
* Open parser
* @param path string representation of path to the file
* @param charset character set
* @return status of operation
*/
status_t open(const LSPString *path, const char *charset = NULL);
/**
* Open parser
* @param path path to the file
* @param charset character set
* @return status of operation
*/
status_t open(const io::Path *path, const char *charset = NULL);
/**
* Wrap string with parser
* @param str string to wrap
* @param charset character set
* @return status of operation
*/
status_t wrap(const char *str, const char *charset = NULL);
/**
* Wrap string with parser
* @param str string to wrap
* @return status of operation
*/
status_t wrap(const LSPString *str);
/**
* Wrap input sequence with parser
* @param seq sequence to use for reads
* @return status of operation
*/
status_t wrap(io::IInSequence *seq, size_t flags = WRAP_NONE);
/**
* Wrap input stream with parser
* @param is input stream
* @param flags wrap flags
* @param charset character set
* @return status of operation
*/
status_t wrap(io::IInStream *is, size_t flags = WRAP_NONE, const char *charset = NULL);
/**
* Close parser
* @return status of operation
*/
status_t close();
public:
/**
* Read next element
* @return XT_ element code or negative status of operation
*/
status_t read_next();
/**
* Get current element
* @return XT_ element code or negative status of operation
*/
status_t get_current();
/**
* Resolve entity with specified value
* @param value value to resolve
* @return status of operation
*/
status_t set_value(const LSPString *value);
/**
* Resolve entity with specified value
* @param value value to resolve
* @param charset character set encoding
* @return status of operation
*/
status_t set_value(const char *value, const char *charset = NULL);
public:
/**
* Check whethere document is standalone
* @return true if document is standalone
*/
inline bool is_standalone() const { return nFlags & XF_STANDALONE; }
/**
* Get version string
* @return version string or NULL is version string is not present in header
*/
inline const LSPString *version() const { return (nFlags & XF_VERSION) ? &sVersion : NULL; }
/**
* Get actual parser version
* @return actual parser version
*/
inline xml_version_t xml_version() const { return enVersion; }
/**
* Get document encoding
* @return document encoding or NULL if encoding string is not present in header
*/
inline const LSPString *encoding() const { return (nFlags & XF_ENCODING) ? &sEncoding : NULL; }
/**
* Return name of current property, tag or processing instruction
* @return name name
*/
const LSPString *name() const;
/**
* Return value of current property, comment or processing instruction
* @return value value
*/
const LSPString *value() const;
/**
* Get current element nesting level
* @return current element nesting level
*/
inline size_t level() const { return vTags.size(); }
/**
* Get document type name
* @return document type name or NULL if not present
*/
inline const LSPString *doctype() const { return (nFlags & XF_DOCTYPE) ? &sDoctype : NULL; }
/**
* Get document type public literal
* @return document type public literal or NULL if not present
*/
inline const LSPString *pub_literal() const { return (nFlags & XF_DOCTYPE_PUB) ? &sPublic: NULL; }
/**
* Get document type system literal
* @return document type system literal or NULL if not present
*/
inline const LSPString *sys_literal() const { return (nFlags & XF_DOCTYPE_SYS) ? &sSystem: NULL; }
};
} /* namespace xml */
} /* namespace lsp */
#endif /* LSP_PLUG_IN_FMT_XML_PULLPARSER_H_ */
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