author | twisti |
Fri, 27 Feb 2009 13:27:09 -0800 | |
changeset 2131 | 98f9cef66a34 |
parent 2129 | e810a33b5c67 |
child 2154 | 72a9b7284ccf |
permissions | -rw-r--r-- |
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/* |
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* Copyright 1997-2009 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
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* CA 95054 USA or visit www.sun.com if you need additional information or |
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* have any questions. |
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* |
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*/ |
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// FILEBUFF.HPP - Definitions for parser file buffering routines |
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#include <iostream> |
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using namespace std; |
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// STRUCTURE FOR HANDLING INPUT AND OUTPUT FILES |
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typedef struct { |
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const char *_name; |
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FILE *_fp; |
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} BufferedFile; |
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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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friend class FileBuffRegion; |
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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 + (s - _buf); } |
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}; |
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//------------------------------FileBuffRegion--------------------------------- |
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// A buffer region is really a region of some file, specified as a linked list |
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// of offsets and lengths. These regions can be merged; overlapping regions |
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// will coalesce. |
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class FileBuffRegion { |
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public: // Workaround dev-studio friend/private bug |
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FileBuffRegion *_next; // Linked list of regions sorted by offset. |
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private: |
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FileBuff *_bfr; // The Buffer of the file |
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int _offset, _length; // The file area |
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int _sol; // Start of line where the file area starts |
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int _line; // First line of region |
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public: |
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FileBuffRegion(FileBuff*, int sol, int line, int offset, int len); |
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~FileBuffRegion(); |
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FileBuffRegion *copy(); // Deep copy |
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FileBuffRegion *merge(FileBuffRegion*); // Merge 2 regions; delete input |
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void print(ostream&); |
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friend ostream& operator<< (ostream&, FileBuffRegion&); |
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}; |