Sat, 07 Nov 2020 10:30:02 +0800
Added tag mips-jdk8u275-b01 for changeset d3b4d62f391f
1 /*
2 * Copyright (c) 1997, 2014, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
25 #ifndef SHARE_VM_ADLC_FILEBUFF_HPP
26 #define SHARE_VM_ADLC_FILEBUFF_HPP
28 // FILEBUFF.HPP - Definitions for parser file buffering routines
29 #include <iostream>
31 using namespace std;
33 // STRUCTURE FOR HANDLING INPUT AND OUTPUT FILES
35 class BufferedFile {
36 public:
37 const char *_name;
38 FILE *_fp;
39 inline BufferedFile() { _name = NULL; _fp = NULL; };
40 inline ~BufferedFile() {};
41 };
43 class ArchDesc;
45 //------------------------------FileBuff--------------------------------------
46 // This class defines a nicely behaved buffer of text. Entire file of text
47 // is read into buffer at creation, with sentinels at start and end.
48 class FileBuff {
49 private:
50 long _bufferSize; // Size of text holding buffer.
51 long _offset; // Expected filepointer offset.
52 long _bufoff; // Start of buffer file offset
54 char *_buf; // The buffer itself.
55 char *_bigbuf; // The buffer plus sentinels; actual heap area
56 char *_bufmax; // A pointer to the buffer end sentinel
57 char *_bufeol; // A pointer to the last complete line end
59 int _err; // Error flag for file seek/read operations
60 long _filepos; // Current offset from start of file
61 int _linenum;
63 ArchDesc& _AD; // Reference to Architecture Description
65 // Error reporting function
66 void file_error(int flag, int linenum, const char *fmt, ...);
68 public:
69 const BufferedFile *_fp; // File to be buffered
71 FileBuff(BufferedFile *fp, ArchDesc& archDesc); // Constructor
72 ~FileBuff(); // Destructor
74 // This returns a pointer to the start of the current line in the buffer,
75 // and increments bufeol and filepos to point at the end of that line.
76 char *get_line(void);
77 int linenum() const { return _linenum; }
78 void set_linenum(int line) { _linenum = line; }
80 // This converts a pointer into the buffer to a file offset. It only works
81 // when the pointer is valid (i.e. just obtained from getline()).
82 long getoff(const char* s) { return _bufoff + (long)(s - _buf); }
83 };
84 #endif // SHARE_VM_ADLC_FILEBUFF_HPP