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/*
* HT Editor
* textfile.h
*
* Copyright (C) 1999-2002 Stefan Weyergraf
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef __TEXTFILE_H__
#define __TEXTFILE_H__
#include "data.h"
#include "stream.h"
#include "syntax.h"
/*
* CLASS ht_textfile
*/
class ht_textfile: public FileLayer {
public:
ht_textfile(File *file, bool own_file);
/* new */
virtual bool convert_ofs2line(FileOfs o, uint *line, uint *pofs) const =0;
virtual bool convert_line2ofs(uint line, uint pofs, FileOfs *o) const =0;
virtual void delete_lines(uint line, uint count)=0;
virtual void delete_chars(uint line, uint ofs, uint count)=0;
virtual bool get_char(uint line, char *ch, uint pos)=0;
virtual bool getline(uint line, uint pofs, void *buf, uint buflen, uint *retlen, lexer_state *state)=0;
virtual uint getlinelength(uint line) const =0;
virtual void insert_lines(uint before, uint count, void **line_ends = NULL, int *lineendlens = NULL)=0;
virtual void insert_chars(uint line, uint ofs, void *chars, uint len)=0;
virtual bool has_line(uint line)=0;
virtual uint linecount() const=0;
virtual void set_layered_assume(File *streamfile, bool ownNewLayered, bool changes_applied)=0;
virtual void set_lexer(ht_syntax_lexer *lexer)=0;
};
/*
* CLASS ht_layer_textfile
*/
class ht_layer_textfile: public ht_textfile {
public:
ht_layer_textfile(ht_textfile *textfile, bool own_textfile);
/* overwritten */
virtual bool convert_ofs2line(FileOfs o, uint *line, uint *pofs) const;
virtual bool convert_line2ofs(uint line, uint pofs, FileOfs *o) const;
virtual void delete_lines(uint line, uint count);
virtual void delete_chars(uint line, uint ofs, uint count);
virtual bool get_char(uint line, char *ch, uint pos);
virtual bool getline(uint line, uint pofs, void *buf, uint buflen, uint *retlen, lexer_state *state);
virtual uint getlinelength(uint line) const;
virtual void insert_lines(uint before, uint count, void **line_ends, int *lineendlens);
virtual void insert_chars(uint line, uint ofs, void *chars, uint len);
virtual bool has_line(uint line);
virtual uint linecount() const;
virtual void set_layered_assume(File *streamfile, bool ownNewLayered, bool changes_applied);
virtual void set_lexer(ht_syntax_lexer *lexer);
};
/*
* CLASS ht_ltextfile_line
*/
class ht_ltextfile_line: public Object {
public:
virtual ~ht_ltextfile_line();
lexer_state instate;
struct {
FileOfs ofs;
uint len;
} on_disk;
bool is_in_memory;
struct {
char *data;
uint len;
} in_memory;
FileOfs nofs;
byte lineendlen;
byte lineend[2];
};
/*
* CLASS ht_ltextfile
*/
class ht_ltextfile: public ht_textfile {
protected:
FileOfs ofs;
Array *lines;
Array *orig_lines;
ht_syntax_lexer *lexer;
uint first_parse_dirty_line;
mutable uint first_nofs_dirty_line;
bool dirty;
void cache_invd();
void cache_flush();
void dirty_nofs(uint line);
void dirty_parse(uint line);
uint find_linelen_forwd(byte *buf, uint maxbuflen, FileOfs ofs, int *le_len);
virtual ht_ltextfile_line *fetch_line(uint line) const;
ht_ltextfile_line *fetch_line_nofs_ok(uint line) const;
ht_ltextfile_line *fetch_line_into_memory(uint line);
uint getlinelength_i(ht_ltextfile_line *e) const;
bool is_dirty_nofs(uint line) const;
bool is_dirty_parse(uint line) const;
byte *match_lineend_forwd(byte *buf, uint buflen, int *le_len);
lexer_state next_instate(uint line);
FileOfs next_nofs(ht_ltextfile_line *l) const;
void split_line(uint a, uint pos, void *line_end, int line_end_len);
void update_nofs(uint line) const;
void update_parse(uint line);
public:
void reread();
ht_ltextfile(File *file, bool own_file, ht_syntax_lexer *lexer);
virtual ~ht_ltextfile();
/* overwritten (streamfile) */
virtual FileOfs copyAllTo(Stream *stream);
virtual void extend(FileOfs newsize);
virtual FileOfs getSize() const;
virtual void pstat(pstat_t &s) const;
virtual uint read(void *buf, uint size);
virtual void setLayered(File *newLayered, bool ownNewLayered);
virtual void seek(FileOfs offset);
virtual FileOfs tell() const;
virtual void truncate(FileOfs newsize);
virtual int vcntl(uint cmd, va_list vargs);
virtual uint write(const void *buf, uint size);
/* overwritten (textfile) */
virtual bool convert_ofs2line(FileOfs o, uint *line, uint *pofs) const;
virtual bool convert_line2ofs(uint line, uint pofs, FileOfs *o) const;
virtual void delete_lines(uint line, uint count);
virtual void delete_chars(uint line, uint ofs, uint count);
virtual bool get_char(uint line, char *ch, uint pos);
virtual bool getline(uint line, uint pofs, void *buf, uint buflen, uint *retlen, lexer_state *state);
virtual uint getlinelength(uint line) const;
virtual void insert_lines(uint before, uint count, void **line_ends, int *lineendlens);
virtual void insert_chars(uint line, uint ofs, void *chars, uint len);
virtual bool has_line(uint line);
virtual uint linecount() const;
virtual void set_layered_assume(File *streamfile, bool ownNewLayered, bool changes_applied);
virtual void set_lexer(ht_syntax_lexer *lexer);
};
#endif /* __TEXTFILE_H__ */
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