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src/share/vm/adlc/filebuff.hpp@284d0af00d53 (annotated)

src/share/vm/adlc/filebuff.hpp

Tue, 09 Dec 2008 12:41:26 -0800

author

jrose

date

Tue, 09 Dec 2008 12:41:26 -0800

changeset 910

284d0af00d53

parent 850

4d9884b01ba6

child 923

569b3b226089

permissions

-rw-r--r--

6771309: debugging AD files is difficult without #line directives in generated code
Summary: more and better #line and #define directives in the generated code; ADLC itself accepts #line directives
Reviewed-by: never, kvn

duke@435	1	/*
duke@435	2	* Copyright 1997-2004 Sun Microsystems, Inc. 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	*
duke@435	19	* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
duke@435	20	* CA 95054 USA or visit www.sun.com if you need additional information or
duke@435	21	* have any questions.
duke@435	22	*
duke@435	23	*/
duke@435	24
duke@435	25	// FILEBUFF.HPP - Definitions for parser file buffering routines
xlu@664	26	#include <iostream>
duke@435	27
xlu@664	28	using namespace std;
duke@435	29	// STRUCTURE FOR HANDLING INPUT AND OUTPUT FILES
duke@435	30	typedef struct {
duke@435	31	const char *_name;
duke@435	32	FILE *_fp;
duke@435	33	} BufferedFile;
duke@435	34
duke@435	35	class ArchDesc;
duke@435	36
duke@435	37	//------------------------------FileBuff--------------------------------------
duke@435	38	// This class defines a nicely behaved buffer of text. Entire file of text
duke@435	39	// is read into buffer at creation, with sentinals at start and end.
duke@435	40	class FileBuff {
duke@435	41	friend class FileBuffRegion;
duke@435	42	private:
duke@435	43	long _bufferSize; // Size of text holding buffer.
duke@435	44	long _offset; // Expected filepointer offset.
duke@435	45	long _bufoff; // Start of buffer file offset
duke@435	46
duke@435	47	char *_buf; // The buffer itself.
duke@435	48	char *_bigbuf; // The buffer plus sentinals; actual heap area
duke@435	49	char *_bufmax; // A pointer to the buffer end sentinal
duke@435	50	char *_bufeol; // A pointer to the last complete line end
duke@435	51
duke@435	52	int _err; // Error flag for file seek/read operations
duke@435	53	long _filepos; // Current offset from start of file
never@850	54	int _linenum;
duke@435	55
duke@435	56	ArchDesc& _AD; // Reference to Architecture Description
duke@435	57
duke@435	58	// Error reporting function
duke@435	59	void file_error(int flag, int linenum, const char *fmt, ...);
duke@435	60
duke@435	61	public:
duke@435	62	const BufferedFile *_fp; // File to be buffered
duke@435	63
duke@435	64	FileBuff(BufferedFile *fp, ArchDesc& archDesc); // Constructor
duke@435	65	~FileBuff(); // Destructor
duke@435	66
duke@435	67	// This returns a pointer to the start of the current line in the buffer,
duke@435	68	// and increments bufeol and filepos to point at the end of that line.
duke@435	69	char *get_line(void);
never@850	70	int linenum() const { return _linenum; }
jrose@910	71	void set_linenum(int line) { _linenum = line; }
duke@435	72
duke@435	73	// This converts a pointer into the buffer to a file offset. It only works
duke@435	74	// when the pointer is valid (i.e. just obtained from getline()).
duke@435	75	int getoff(const char *s) { return _bufoff+(int)(s-_buf); }
duke@435	76	};
duke@435	77
duke@435	78	//------------------------------FileBuffRegion---------------------------------
duke@435	79	// A buffer region is really a region of some file, specified as a linked list
duke@435	80	// of offsets and lengths. These regions can be merged; overlapping regions
duke@435	81	// will coalesce.
duke@435	82	class FileBuffRegion {
duke@435	83	public: // Workaround dev-studio friend/private bug
duke@435	84	FileBuffRegion *_next; // Linked list of regions sorted by offset.
duke@435	85	private:
duke@435	86	FileBuff *_bfr; // The Buffer of the file
duke@435	87	int _offset, _length; // The file area
duke@435	88	int _sol; // Start of line where the file area starts
duke@435	89	int _line; // First line of region
duke@435	90
duke@435	91	public:
duke@435	92	FileBuffRegion(FileBuff*, int sol, int line, int offset, int len);
duke@435	93	~FileBuffRegion();
duke@435	94
duke@435	95	FileBuffRegion *copy(); // Deep copy
duke@435	96	FileBuffRegion *merge(FileBuffRegion*); // Merge 2 regions; delete input
duke@435	97
duke@435	98	// void print(std::ostream&);
duke@435	99	// friend std::ostream& operator<< (std::ostream&, FileBuffRegion&);
duke@435	100	void print(ostream&);
duke@435	101	friend ostream& operator<< (ostream&, FileBuffRegion&);
duke@435	102	};