82 lines
3.1 KiB
C++
82 lines
3.1 KiB
C++
/*
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* Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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#ifndef SHARE_VM_ADLC_FILEBUFF_HPP
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#define SHARE_VM_ADLC_FILEBUFF_HPP
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// FILEBUFF.HPP - Definitions for parser file buffering routines
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// STRUCTURE FOR HANDLING INPUT AND OUTPUT FILES
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class BufferedFile {
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public:
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const char *_name;
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FILE *_fp;
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inline BufferedFile() { _name = NULL; _fp = NULL; };
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inline ~BufferedFile() {};
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};
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class ArchDesc;
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//------------------------------FileBuff--------------------------------------
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// This class defines a nicely behaved buffer of text. Entire file of text
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// is read into buffer at creation, with sentinels at start and end.
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class FileBuff {
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private:
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long _bufferSize; // Size of text holding buffer.
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long _offset; // Expected filepointer offset.
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long _bufoff; // Start of buffer file offset
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char *_buf; // The buffer itself.
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char *_bigbuf; // The buffer plus sentinels; actual heap area
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char *_bufmax; // A pointer to the buffer end sentinel
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char *_bufeol; // A pointer to the last complete line end
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int _err; // Error flag for file seek/read operations
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long _filepos; // Current offset from start of file
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int _linenum;
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ArchDesc& _AD; // Reference to Architecture Description
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// Error reporting function
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void file_error(int flag, int linenum, const char *fmt, ...);
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public:
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const BufferedFile *_fp; // File to be buffered
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FileBuff(BufferedFile *fp, ArchDesc& archDesc); // Constructor
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~FileBuff(); // Destructor
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// This returns a pointer to the start of the current line in the buffer,
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// and increments bufeol and filepos to point at the end of that line.
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char *get_line(void);
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int linenum() const { return _linenum; }
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void set_linenum(int line) { _linenum = line; }
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// This converts a pointer into the buffer to a file offset. It only works
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// when the pointer is valid (i.e. just obtained from getline()).
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long getoff(const char* s) { return _bufoff + (long)(s - _buf); }
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};
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#endif // SHARE_VM_ADLC_FILEBUFF_HPP
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