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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: 21 апр. 2017 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_OBJ_PULLPARSER_H_
#define LSP_PLUG_IN_FMT_OBJ_PULLPARSER_H_
#include <lsp-plug.in/runtime/version.h>
#include <lsp-plug.in/common/types.h>
#include <lsp-plug.in/common/status.h>
#include <lsp-plug.in/io/IInSequence.h>
#include <lsp-plug.in/io/IInStream.h>
#include <lsp-plug.in/io/Path.h>
#include <lsp-plug.in/fmt/obj/const.h>
namespace lsp
{
namespace obj
{
class PullParser
{
private:
PullParser & operator = (const PullParser &);
public:
static const size_t IO_BUF_SIZE = 8192;
protected:
io::IInSequence *pIn;
size_t nWFlags;
LSPString sLine; // Last read line
lsp_wchar_t *pBuffer; // Buffer for character data
size_t nBufOff; // Buffer offset
size_t nBufLen; // Buffer length
bool bSkipLF; // Skip line-feed character
size_t nLines; // Number of lines read
event_t sEvent;
ssize_t nVx; // Number of vertexes
ssize_t nParVx; // Number of parameter vertexes
ssize_t nTexVx; // Number of texture vertexes
ssize_t nNormVx; // Number of normal vertexes
protected:
status_t read_event();
status_t read_line();
status_t copy_event(event_t *ev) const;
status_t eliminate_comments();
status_t parse_line(const char *s);
static inline bool is_space(char ch);
static bool prefix_match(const char *s, const char *prefix);
static const char *skip_spaces(const char *s);
static bool parse_float(float *dst, const char **s);
static bool parse_int(ssize_t *dst, const char **s);
static bool end_of_line(const char *s);
public:
explicit PullParser();
~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:
/**
* Get next event
* @param ev pointer to structure to store the event
* @return status of operation
*/
status_t next(event_t *ev = NULL);
/**
* Get current event
* @param ev pointer to structure to store the event
* @return NULL if there is no current event
*/
const event_t *current() const;
/**
* Get current event
* @param ev pointer to structure to store the event
* @return NULL if there is no current event
*/
status_t current(event_t *ev) const;
};
}
} /* namespace lsp */
#endif /* LSP_PLUG_IN_FMT_OBJ_PULLPARSER_H_ */
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