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src/share/vm/adlc/filebuff.hpp@a9becfeecd1b (annotated)

src/share/vm/adlc/filebuff.hpp

Wed, 22 Jan 2014 17:42:23 -0800

author

kvn

date

Wed, 22 Jan 2014 17:42:23 -0800

changeset 6503

a9becfeecd1b

parent 4161

d336b3173277

child 6876

710a3c8b516e

child 9816

acd345f4f9e5

permissions

-rw-r--r--

Merge

duke@435	1	/*
stefank@2314	2	* Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.
duke@435	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435	4	*
duke@435	5	* This code is free software; you can redistribute it and/or modify it
duke@435	6	* under the terms of the GNU General Public License version 2 only, as
duke@435	7	* published by the Free Software Foundation.
duke@435	8	*
duke@435	9	* This code is distributed in the hope that it will be useful, but WITHOUT
duke@435	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
duke@435	12	* version 2 for more details (a copy is included in the LICENSE file that
duke@435	13	* accompanied this code).
duke@435	14	*
duke@435	15	* You should have received a copy of the GNU General Public License version
duke@435	16	* 2 along with this work; if not, write to the Free Software Foundation,
duke@435	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435	18	*
trims@1907	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907	20	* or visit www.oracle.com if you need additional information or have any
trims@1907	21	* questions.
duke@435	22	*
duke@435	23	*/
duke@435	24
stefank@2314	25	#ifndef SHARE_VM_ADLC_FILEBUFF_HPP
stefank@2314	26	#define SHARE_VM_ADLC_FILEBUFF_HPP
stefank@2314	27
duke@435	28	// FILEBUFF.HPP - Definitions for parser file buffering routines
xlu@664	29	#include <iostream>
duke@435	30
xlu@664	31	using namespace std;
twisti@1038	32
duke@435	33	// STRUCTURE FOR HANDLING INPUT AND OUTPUT FILES
kvn@4161	34
kvn@4161	35	class BufferedFile {
kvn@4161	36	public:
duke@435	37	const char *_name;
duke@435	38	FILE *_fp;
kvn@4161	39	inline BufferedFile() { _name = NULL; _fp = NULL; };
kvn@4161	40	inline ~BufferedFile() {};
kvn@4161	41	};
duke@435	42
duke@435	43	class ArchDesc;
duke@435	44
duke@435	45	//------------------------------FileBuff--------------------------------------
duke@435	46	// This class defines a nicely behaved buffer of text. Entire file of text
twisti@1040	47	// is read into buffer at creation, with sentinels at start and end.
duke@435	48	class FileBuff {
duke@435	49	friend class FileBuffRegion;
duke@435	50	private:
duke@435	51	long _bufferSize; // Size of text holding buffer.
duke@435	52	long _offset; // Expected filepointer offset.
duke@435	53	long _bufoff; // Start of buffer file offset
duke@435	54
duke@435	55	char *_buf; // The buffer itself.
twisti@1040	56	char *_bigbuf; // The buffer plus sentinels; actual heap area
twisti@1040	57	char *_bufmax; // A pointer to the buffer end sentinel
duke@435	58	char *_bufeol; // A pointer to the last complete line end
duke@435	59
duke@435	60	int _err; // Error flag for file seek/read operations
duke@435	61	long _filepos; // Current offset from start of file
never@850	62	int _linenum;
duke@435	63
duke@435	64	ArchDesc& _AD; // Reference to Architecture Description
duke@435	65
duke@435	66	// Error reporting function
duke@435	67	void file_error(int flag, int linenum, const char *fmt, ...);
duke@435	68
duke@435	69	public:
duke@435	70	const BufferedFile *_fp; // File to be buffered
duke@435	71
duke@435	72	FileBuff(BufferedFile *fp, ArchDesc& archDesc); // Constructor
duke@435	73	~FileBuff(); // Destructor
duke@435	74
duke@435	75	// This returns a pointer to the start of the current line in the buffer,
duke@435	76	// and increments bufeol and filepos to point at the end of that line.
duke@435	77	char *get_line(void);
never@850	78	int linenum() const { return _linenum; }
jrose@910	79	void set_linenum(int line) { _linenum = line; }
duke@435	80
duke@435	81	// This converts a pointer into the buffer to a file offset. It only works
duke@435	82	// when the pointer is valid (i.e. just obtained from getline()).
ohair@1204	83	long getoff(const char* s) { return _bufoff + (long)(s - _buf); }
duke@435	84	};
duke@435	85
duke@435	86	//------------------------------FileBuffRegion---------------------------------
duke@435	87	// A buffer region is really a region of some file, specified as a linked list
duke@435	88	// of offsets and lengths. These regions can be merged; overlapping regions
duke@435	89	// will coalesce.
duke@435	90	class FileBuffRegion {
duke@435	91	public: // Workaround dev-studio friend/private bug
duke@435	92	FileBuffRegion *_next; // Linked list of regions sorted by offset.
duke@435	93	private:
duke@435	94	FileBuff *_bfr; // The Buffer of the file
duke@435	95	int _offset, _length; // The file area
duke@435	96	int _sol; // Start of line where the file area starts
duke@435	97	int _line; // First line of region
duke@435	98
duke@435	99	public:
duke@435	100	FileBuffRegion(FileBuff*, int sol, int line, int offset, int len);
duke@435	101	~FileBuffRegion();
duke@435	102
duke@435	103	FileBuffRegion *copy(); // Deep copy
duke@435	104	FileBuffRegion *merge(FileBuffRegion*); // Merge 2 regions; delete input
duke@435	105
duke@435	106	void print(ostream&);
duke@435	107	friend ostream& operator<< (ostream&, FileBuffRegion&);
duke@435	108	};
stefank@2314	109
stefank@2314	110	#endif // SHARE_VM_ADLC_FILEBUFF_HPP