Mercurial > hg > graal-compiler
view src/share/vm/adlc/filebuff.hpp @ 2153:377371490991
Merge
author | johnc |
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date | Thu, 20 Jan 2011 13:57:12 -0800 |
parents | f95d63e2154a |
children | d336b3173277 |
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/* * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code 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 * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ #ifndef SHARE_VM_ADLC_FILEBUFF_HPP #define SHARE_VM_ADLC_FILEBUFF_HPP // FILEBUFF.HPP - Definitions for parser file buffering routines #include <iostream> using namespace std; // STRUCTURE FOR HANDLING INPUT AND OUTPUT FILES typedef struct { const char *_name; FILE *_fp; } BufferedFile; class ArchDesc; //------------------------------FileBuff-------------------------------------- // This class defines a nicely behaved buffer of text. Entire file of text // is read into buffer at creation, with sentinels at start and end. class FileBuff { friend class FileBuffRegion; private: long _bufferSize; // Size of text holding buffer. long _offset; // Expected filepointer offset. long _bufoff; // Start of buffer file offset char *_buf; // The buffer itself. char *_bigbuf; // The buffer plus sentinels; actual heap area char *_bufmax; // A pointer to the buffer end sentinel char *_bufeol; // A pointer to the last complete line end int _err; // Error flag for file seek/read operations long _filepos; // Current offset from start of file int _linenum; ArchDesc& _AD; // Reference to Architecture Description // Error reporting function void file_error(int flag, int linenum, const char *fmt, ...); public: const BufferedFile *_fp; // File to be buffered FileBuff(BufferedFile *fp, ArchDesc& archDesc); // Constructor ~FileBuff(); // Destructor // This returns a pointer to the start of the current line in the buffer, // and increments bufeol and filepos to point at the end of that line. char *get_line(void); int linenum() const { return _linenum; } void set_linenum(int line) { _linenum = line; } // This converts a pointer into the buffer to a file offset. It only works // when the pointer is valid (i.e. just obtained from getline()). long getoff(const char* s) { return _bufoff + (long)(s - _buf); } }; //------------------------------FileBuffRegion--------------------------------- // A buffer region is really a region of some file, specified as a linked list // of offsets and lengths. These regions can be merged; overlapping regions // will coalesce. class FileBuffRegion { public: // Workaround dev-studio friend/private bug FileBuffRegion *_next; // Linked list of regions sorted by offset. private: FileBuff *_bfr; // The Buffer of the file int _offset, _length; // The file area int _sol; // Start of line where the file area starts int _line; // First line of region public: FileBuffRegion(FileBuff*, int sol, int line, int offset, int len); ~FileBuffRegion(); FileBuffRegion *copy(); // Deep copy FileBuffRegion *merge(FileBuffRegion*); // Merge 2 regions; delete input void print(ostream&); friend ostream& operator<< (ostream&, FileBuffRegion&); }; #endif // SHARE_VM_ADLC_FILEBUFF_HPP