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Diffstat (limited to 'contrib/libio/parsestream.h')
-rw-r--r-- | contrib/libio/parsestream.h | 156 |
1 files changed, 0 insertions, 156 deletions
diff --git a/contrib/libio/parsestream.h b/contrib/libio/parsestream.h deleted file mode 100644 index 326ab87a8090..000000000000 --- a/contrib/libio/parsestream.h +++ /dev/null @@ -1,156 +0,0 @@ -/* This is part of libio/iostream, providing -*- C++ -*- input/output. -Copyright (C) 1993 Free Software Foundation - -This file is part of the GNU IO Library. This library is free -software; you can redistribute it and/or modify it under the -terms of the GNU General Public License as published by the -Free Software Foundation; either version 2, or (at your option) -any later version. - -This library 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 library; see the file COPYING. If not, write to the Free -Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. - -As a special exception, if you link this library with files -compiled with a GNU compiler to produce an executable, this does not cause -the resulting executable to be covered by the GNU General Public License. -This exception does not however invalidate any other reasons why -the executable file might be covered by the GNU General Public License. - -Written by Per Bothner (bothner@cygnus.com). */ - -#ifndef PARSESTREAM_H -#define PARSESTREAM_H -#ifdef __GNUG__ -#pragma interface -#endif -#include "streambuf.h" - -extern "C++" { -// A parsebuf is a streambuf optimized for scanning text files. -// It keeps track of line and column numbers. -// It is guaranteed to remember the entire current line, -// as well the '\n'-s on either side of it (if they exist). -// You can arbitrarily seek (or unget) within this extended line. -// Other backward seeks are not supported. -// Normal read semantics are supported (and hence istream operators like >>). - -class parsebuf : public streambuf { - protected: - _IO_fpos_t pos_at_line_start; - long _line_length; - unsigned long __line_number; - char *buf_start; - char *buf_end; - - public: - parsebuf *chain; - - // Return column number (raw - don't handle tabs etc). - // Retult can be -1, meaning: at '\n' before current line. - virtual int tell_in_line(); - - // seek to (raw) column I in current line. - // Result is new (raw) column position - differs from I if unable to seek. - // Seek to -1 tries to seek to before previous LF. - virtual int seek_in_line(int i); - - // Note: there is no "current line" initially, until something is read. - - // Current line number, starting with 0. - // If tell_in_line()==-1, then line number of next line. - int line_number() { return __line_number; } - - // Length of current line, not counting either '\n'. - int line_length() { return _line_length; } - // Current line - not a copy, so file ops may trash it. - virtual char* current_line(); - virtual streampos seekoff(streamoff, _seek_dir, int mode=ios::in|ios::out); - virtual streambuf* setbuf(char* p, int len); - protected: - parsebuf() { chain= NULL; - __line_number = 0; pos_at_line_start = 0; _line_length = -1; } - virtual int pbackfail(int c); -}; - -// A string_parsebuf is a parsebuf whose source is a fixed string. - -class string_parsebuf : public parsebuf { - public: - int do_delete; - string_parsebuf(char *str, int len, int delete_at_close=0); - virtual int underflow(); - virtual char* current_line(); - virtual int seek_in_line(int i); - virtual int tell_in_line(); - char *left() const { return base(); } - char *right() const { return ebuf(); } -// streampos seekoff(streamoff, _seek_dir, int); -}; - -// A func_parsebuf calls a given function to get new input. -// Each call returns an entire NUL-terminated line (without the '\n'). -// That line has been allocated with malloc(), not new. -// The interface is tailored to the GNU readline library. -// Example: -// char* DoReadLine(void* arg) -// { -// char *line = readline((char*)arg); /* 'arg' is used as prompt. */ -// if line == NULL) { putc('\n', stderr); return NULL; } -// if (line[0] != '\0') add_history(line); -// return line; -// } -// char PromptBuffer[100] = "> "; -// func_parsebuf my_stream(DoReadLine, PromptBuffer); - -typedef char *(*CharReader)(void *arg); -class istream; - -class func_parsebuf : public parsebuf { - public: - void *arg; - CharReader read_func; - int backed_up_to_newline; - func_parsebuf(CharReader func, void *argm = NULL); - int underflow(); - virtual int tell_in_line(); - virtual int seek_in_line(int i); - virtual char* current_line(); -}; - -// A general_parsebuf is a parsebuf which gets its input from some -// other streambuf. It explicitly buffers up an entire line. - -class general_parsebuf : public parsebuf { - public: - streambuf *sbuf; - int delete_buf; // Delete sbuf when destroying this. - general_parsebuf(streambuf *buf, int delete_arg_buf = 0); - int underflow(); - virtual int tell_in_line(); - virtual int seek_in_line(int i); - ~general_parsebuf(); - virtual char* current_line(); -}; - -#if 0 -class parsestream : public istream { - streammarker marks[2]; - short _first; // of the two marks; either 0 or 1 - int _lineno; - int first() { return _first; } - int second() { return 1-_first; } - int line_length() { marks[second].delta(marks[first]); } - int line_length() { marks[second].delta(marks[first]); } - int seek_in_line(int i); - int tell_in_line(); - int line_number(); -}; -#endif -} // extern "C++" -#endif /*!defined(PARSESTREAM_H)*/ |