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1 /*
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2 * Copyright 1997-2004 Sun Microsystems, Inc. All Rights Reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any questions.
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22 *
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23 */
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24
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25 // FILEBUFF.HPP - Definitions for parser file buffering routines
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229
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26 #include <iostream>
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0
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27
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229
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28 using namespace std;
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29 // STRUCTURE FOR HANDLING INPUT AND OUTPUT FILES
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30 typedef struct {
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31 const char *_name;
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32 FILE *_fp;
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33 } BufferedFile;
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34
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35 class ArchDesc;
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36
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37 //------------------------------FileBuff--------------------------------------
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38 // This class defines a nicely behaved buffer of text. Entire file of text
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39 // is read into buffer at creation, with sentinals at start and end.
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40 class FileBuff {
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41 friend class FileBuffRegion;
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42 private:
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43 long _bufferSize; // Size of text holding buffer.
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44 long _offset; // Expected filepointer offset.
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45 long _bufoff; // Start of buffer file offset
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46
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47 char *_buf; // The buffer itself.
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48 char *_bigbuf; // The buffer plus sentinals; actual heap area
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49 char *_bufmax; // A pointer to the buffer end sentinal
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50 char *_bufeol; // A pointer to the last complete line end
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51
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52 int _err; // Error flag for file seek/read operations
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53 long _filepos; // Current offset from start of file
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54
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55 ArchDesc& _AD; // Reference to Architecture Description
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56
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57 // Error reporting function
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58 void file_error(int flag, int linenum, const char *fmt, ...);
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59
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60 public:
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61 const BufferedFile *_fp; // File to be buffered
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62
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63 FileBuff(BufferedFile *fp, ArchDesc& archDesc); // Constructor
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64 ~FileBuff(); // Destructor
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65
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66 // This returns a pointer to the start of the current line in the buffer,
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67 // and increments bufeol and filepos to point at the end of that line.
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68 char *get_line(void);
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69
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70 // This converts a pointer into the buffer to a file offset. It only works
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71 // when the pointer is valid (i.e. just obtained from getline()).
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72 int getoff(const char *s) { return _bufoff+(int)(s-_buf); }
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73 };
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74
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75 //------------------------------FileBuffRegion---------------------------------
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76 // A buffer region is really a region of some file, specified as a linked list
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77 // of offsets and lengths. These regions can be merged; overlapping regions
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78 // will coalesce.
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79 class FileBuffRegion {
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80 public: // Workaround dev-studio friend/private bug
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81 FileBuffRegion *_next; // Linked list of regions sorted by offset.
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82 private:
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83 FileBuff *_bfr; // The Buffer of the file
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84 int _offset, _length; // The file area
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85 int _sol; // Start of line where the file area starts
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86 int _line; // First line of region
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87
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88 public:
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89 FileBuffRegion(FileBuff*, int sol, int line, int offset, int len);
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90 ~FileBuffRegion();
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91
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92 FileBuffRegion *copy(); // Deep copy
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93 FileBuffRegion *merge(FileBuffRegion*); // Merge 2 regions; delete input
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94
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95 // void print(std::ostream&);
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96 // friend std::ostream& operator<< (std::ostream&, FileBuffRegion&);
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97 void print(ostream&);
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98 friend ostream& operator<< (ostream&, FileBuffRegion&);
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99 };
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