Mercurial > hg > truffle
comparison src/share/vm/adlc/filebuff.hpp @ 0:a61af66fc99e jdk7-b24
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author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | 3e82d72933d0 |
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1 /* | |
2 * Copyright 1997-2004 Sun Microsystems, Inc. All Rights Reserved. | |
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
21 * have any questions. | |
22 * | |
23 */ | |
24 | |
25 // FILEBUFF.HPP - Definitions for parser file buffering routines | |
26 | |
27 #if _MSC_VER >= 1300 // Visual C++ 7.0 or later | |
28 #include <iostream> | |
29 #else | |
30 #include <iostream.h> | |
31 #endif | |
32 | |
33 // STRUCTURE FOR HANDLING INPUT AND OUTPUT FILES | |
34 typedef struct { | |
35 const char *_name; | |
36 FILE *_fp; | |
37 } BufferedFile; | |
38 | |
39 class ArchDesc; | |
40 | |
41 //------------------------------FileBuff-------------------------------------- | |
42 // This class defines a nicely behaved buffer of text. Entire file of text | |
43 // is read into buffer at creation, with sentinals at start and end. | |
44 class FileBuff { | |
45 friend class FileBuffRegion; | |
46 private: | |
47 long _bufferSize; // Size of text holding buffer. | |
48 long _offset; // Expected filepointer offset. | |
49 long _bufoff; // Start of buffer file offset | |
50 | |
51 char *_buf; // The buffer itself. | |
52 char *_bigbuf; // The buffer plus sentinals; actual heap area | |
53 char *_bufmax; // A pointer to the buffer end sentinal | |
54 char *_bufeol; // A pointer to the last complete line end | |
55 | |
56 int _err; // Error flag for file seek/read operations | |
57 long _filepos; // Current offset from start of file | |
58 | |
59 ArchDesc& _AD; // Reference to Architecture Description | |
60 | |
61 // Error reporting function | |
62 void file_error(int flag, int linenum, const char *fmt, ...); | |
63 | |
64 public: | |
65 const BufferedFile *_fp; // File to be buffered | |
66 | |
67 FileBuff(BufferedFile *fp, ArchDesc& archDesc); // Constructor | |
68 ~FileBuff(); // Destructor | |
69 | |
70 // This returns a pointer to the start of the current line in the buffer, | |
71 // and increments bufeol and filepos to point at the end of that line. | |
72 char *get_line(void); | |
73 | |
74 // This converts a pointer into the buffer to a file offset. It only works | |
75 // when the pointer is valid (i.e. just obtained from getline()). | |
76 int getoff(const char *s) { return _bufoff+(int)(s-_buf); } | |
77 }; | |
78 | |
79 //------------------------------FileBuffRegion--------------------------------- | |
80 // A buffer region is really a region of some file, specified as a linked list | |
81 // of offsets and lengths. These regions can be merged; overlapping regions | |
82 // will coalesce. | |
83 class FileBuffRegion { | |
84 public: // Workaround dev-studio friend/private bug | |
85 FileBuffRegion *_next; // Linked list of regions sorted by offset. | |
86 private: | |
87 FileBuff *_bfr; // The Buffer of the file | |
88 int _offset, _length; // The file area | |
89 int _sol; // Start of line where the file area starts | |
90 int _line; // First line of region | |
91 | |
92 public: | |
93 FileBuffRegion(FileBuff*, int sol, int line, int offset, int len); | |
94 ~FileBuffRegion(); | |
95 | |
96 FileBuffRegion *copy(); // Deep copy | |
97 FileBuffRegion *merge(FileBuffRegion*); // Merge 2 regions; delete input | |
98 | |
99 // void print(std::ostream&); | |
100 // friend std::ostream& operator<< (std::ostream&, FileBuffRegion&); | |
101 void print(ostream&); | |
102 friend ostream& operator<< (ostream&, FileBuffRegion&); | |
103 }; |