1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/vm/adlc/filebuff.hpp Wed Apr 27 01:25:04 2016 +0800
1.3 @@ -0,0 +1,110 @@
1.4 +/*
1.5 + * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.23 + * or visit www.oracle.com if you need additional information or have any
1.24 + * questions.
1.25 + *
1.26 + */
1.27 +
1.28 +#ifndef SHARE_VM_ADLC_FILEBUFF_HPP
1.29 +#define SHARE_VM_ADLC_FILEBUFF_HPP
1.30 +
1.31 +// FILEBUFF.HPP - Definitions for parser file buffering routines
1.32 +#include <iostream>
1.33 +
1.34 +using namespace std;
1.35 +
1.36 +// STRUCTURE FOR HANDLING INPUT AND OUTPUT FILES
1.37 +
1.38 +class BufferedFile {
1.39 + public:
1.40 + const char *_name;
1.41 + FILE *_fp;
1.42 + inline BufferedFile() { _name = NULL; _fp = NULL; };
1.43 + inline ~BufferedFile() {};
1.44 +};
1.45 +
1.46 +class ArchDesc;
1.47 +
1.48 +//------------------------------FileBuff--------------------------------------
1.49 +// This class defines a nicely behaved buffer of text. Entire file of text
1.50 +// is read into buffer at creation, with sentinels at start and end.
1.51 +class FileBuff {
1.52 + friend class FileBuffRegion;
1.53 + private:
1.54 + long _bufferSize; // Size of text holding buffer.
1.55 + long _offset; // Expected filepointer offset.
1.56 + long _bufoff; // Start of buffer file offset
1.57 +
1.58 + char *_buf; // The buffer itself.
1.59 + char *_bigbuf; // The buffer plus sentinels; actual heap area
1.60 + char *_bufmax; // A pointer to the buffer end sentinel
1.61 + char *_bufeol; // A pointer to the last complete line end
1.62 +
1.63 + int _err; // Error flag for file seek/read operations
1.64 + long _filepos; // Current offset from start of file
1.65 + int _linenum;
1.66 +
1.67 + ArchDesc& _AD; // Reference to Architecture Description
1.68 +
1.69 + // Error reporting function
1.70 + void file_error(int flag, int linenum, const char *fmt, ...);
1.71 +
1.72 + public:
1.73 + const BufferedFile *_fp; // File to be buffered
1.74 +
1.75 + FileBuff(BufferedFile *fp, ArchDesc& archDesc); // Constructor
1.76 + ~FileBuff(); // Destructor
1.77 +
1.78 + // This returns a pointer to the start of the current line in the buffer,
1.79 + // and increments bufeol and filepos to point at the end of that line.
1.80 + char *get_line(void);
1.81 + int linenum() const { return _linenum; }
1.82 + void set_linenum(int line) { _linenum = line; }
1.83 +
1.84 + // This converts a pointer into the buffer to a file offset. It only works
1.85 + // when the pointer is valid (i.e. just obtained from getline()).
1.86 + long getoff(const char* s) { return _bufoff + (long)(s - _buf); }
1.87 +};
1.88 +
1.89 +//------------------------------FileBuffRegion---------------------------------
1.90 +// A buffer region is really a region of some file, specified as a linked list
1.91 +// of offsets and lengths. These regions can be merged; overlapping regions
1.92 +// will coalesce.
1.93 +class FileBuffRegion {
1.94 + public: // Workaround dev-studio friend/private bug
1.95 + FileBuffRegion *_next; // Linked list of regions sorted by offset.
1.96 + private:
1.97 + FileBuff *_bfr; // The Buffer of the file
1.98 + int _offset, _length; // The file area
1.99 + int _sol; // Start of line where the file area starts
1.100 + int _line; // First line of region
1.101 +
1.102 + public:
1.103 + FileBuffRegion(FileBuff*, int sol, int line, int offset, int len);
1.104 + ~FileBuffRegion();
1.105 +
1.106 + FileBuffRegion *copy(); // Deep copy
1.107 + FileBuffRegion *merge(FileBuffRegion*); // Merge 2 regions; delete input
1.108 +
1.109 + void print(ostream&);
1.110 + friend ostream& operator<< (ostream&, FileBuffRegion&);
1.111 +};
1.112 +
1.113 +#endif // SHARE_VM_ADLC_FILEBUFF_HPP
