Mercurial > hg > truffle
annotate src/share/vm/adlc/filebuff.hpp @ 488:569b3b226089
Merge
| author | trims |
|---|---|
| date | Sat, 20 Dec 2008 09:57:03 -0800 |
| parents | 284d0af00d53 ad8c8ca4ab0f |
| children | 0fbdb4381b99 dbbe28fc66b5 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 470 | 2 * Copyright 1997-2008 Sun Microsystems, Inc. All Rights Reserved. |
| 0 | 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 | |
| 229 | 26 #include <iostream> |
| 0 | 27 |
| 229 | 28 using namespace std; |
| 0 | 29 // STRUCTURE FOR HANDLING INPUT AND OUTPUT FILES |
| 30 typedef struct { | |
| 31 const char *_name; | |
| 32 FILE *_fp; | |
| 33 } BufferedFile; | |
| 34 | |
| 35 class ArchDesc; | |
| 36 | |
| 37 //------------------------------FileBuff-------------------------------------- | |
| 38 // This class defines a nicely behaved buffer of text. Entire file of text | |
| 39 // is read into buffer at creation, with sentinals at start and end. | |
| 40 class FileBuff { | |
| 41 friend class FileBuffRegion; | |
| 42 private: | |
| 43 long _bufferSize; // Size of text holding buffer. | |
| 44 long _offset; // Expected filepointer offset. | |
| 45 long _bufoff; // Start of buffer file offset | |
| 46 | |
| 47 char *_buf; // The buffer itself. | |
| 48 char *_bigbuf; // The buffer plus sentinals; actual heap area | |
| 49 char *_bufmax; // A pointer to the buffer end sentinal | |
| 50 char *_bufeol; // A pointer to the last complete line end | |
| 51 | |
| 52 int _err; // Error flag for file seek/read operations | |
| 53 long _filepos; // Current offset from start of file | |
|
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54 int _linenum; |
| 0 | 55 |
| 56 ArchDesc& _AD; // Reference to Architecture Description | |
| 57 | |
| 58 // Error reporting function | |
| 59 void file_error(int flag, int linenum, const char *fmt, ...); | |
| 60 | |
| 61 public: | |
| 62 const BufferedFile *_fp; // File to be buffered | |
| 63 | |
| 64 FileBuff(BufferedFile *fp, ArchDesc& archDesc); // Constructor | |
| 65 ~FileBuff(); // Destructor | |
| 66 | |
| 67 // This returns a pointer to the start of the current line in the buffer, | |
| 68 // and increments bufeol and filepos to point at the end of that line. | |
| 69 char *get_line(void); | |
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70 int linenum() const { return _linenum; } |
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71 void set_linenum(int line) { _linenum = line; } |
| 0 | 72 |
| 73 // This converts a pointer into the buffer to a file offset. It only works | |
| 74 // when the pointer is valid (i.e. just obtained from getline()). | |
| 75 int getoff(const char *s) { return _bufoff+(int)(s-_buf); } | |
| 76 }; | |
| 77 | |
| 78 //------------------------------FileBuffRegion--------------------------------- | |
| 79 // A buffer region is really a region of some file, specified as a linked list | |
| 80 // of offsets and lengths. These regions can be merged; overlapping regions | |
| 81 // will coalesce. | |
| 82 class FileBuffRegion { | |
| 83 public: // Workaround dev-studio friend/private bug | |
| 84 FileBuffRegion *_next; // Linked list of regions sorted by offset. | |
| 85 private: | |
| 86 FileBuff *_bfr; // The Buffer of the file | |
| 87 int _offset, _length; // The file area | |
| 88 int _sol; // Start of line where the file area starts | |
| 89 int _line; // First line of region | |
| 90 | |
| 91 public: | |
| 92 FileBuffRegion(FileBuff*, int sol, int line, int offset, int len); | |
| 93 ~FileBuffRegion(); | |
| 94 | |
| 95 FileBuffRegion *copy(); // Deep copy | |
| 96 FileBuffRegion *merge(FileBuffRegion*); // Merge 2 regions; delete input | |
| 97 | |
| 98 // void print(std::ostream&); | |
| 99 // friend std::ostream& operator<< (std::ostream&, FileBuffRegion&); | |
| 100 void print(ostream&); | |
| 101 friend ostream& operator<< (ostream&, FileBuffRegion&); | |
| 102 }; |