Mercurial > hg > graal-compiler
annotate graal/com.oracle.truffle.sl/src/com/oracle/truffle/sl/parser/Scanner.frame @ 15128:d0e2d565176f
BaselineCompiler: copy frame state builder at loop headers.
author | Josef Eisl <josef.eisl@jku.at> |
---|---|
date | Tue, 15 Apr 2014 20:35:52 +0200 |
parents | 71991b7a0f14 |
children |
rev | line source |
---|---|
7292
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
1 /*------------------------------------------------------------------------- |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
2 Compiler Generator Coco/R, |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
3 Copyright (c) 1990, 2004 Hanspeter Moessenboeck, University of Linz |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
4 extended by M. Loeberbauer & A. Woess, Univ. of Linz |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
5 ported from C# to Java by Wolfgang Ahorner |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
6 with improvements by Pat Terry, Rhodes University |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
7 |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
8 This program is free software; you can redistribute it and/or modify it |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
9 under the terms of the GNU General Public License as published by the |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
10 Free Software Foundation; either version 2, or (at your option) any |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
11 later version. |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
12 |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
13 This program is distributed in the hope that it will be useful, but |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
14 WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
15 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
16 for more details. |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
17 |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
18 You should have received a copy of the GNU General Public License along |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
19 with this program; if not, write to the Free Software Foundation, Inc., |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
20 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
21 |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
22 As an exception, it is allowed to write an extension of Coco/R that is |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
23 used as a plugin in non-free software. |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
24 |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
25 If not otherwise stated, any source code generated by Coco/R (other than |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
26 Coco/R itself) does not fall under the GNU General Public License. |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
27 ------------------------------------------------------------------------*/ |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
28 -->begin |
12752
71991b7a0f14
SL: Enhanced SimpleLanguage with support for if statements, function calls, function caching + inlining and builtins.
Christian Humer <christian.humer@gmail.com>
parents:
7517
diff
changeset
|
29 package com.oracle.truffle.sl.parser; |
71991b7a0f14
SL: Enhanced SimpleLanguage with support for if statements, function calls, function caching + inlining and builtins.
Christian Humer <christian.humer@gmail.com>
parents:
7517
diff
changeset
|
30 |
7292
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
31 import java.io.InputStream; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
32 import java.io.IOException; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
33 import java.io.RandomAccessFile; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
34 import java.util.Map; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
35 import java.util.HashMap; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
36 |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
37 // Checkstyle: stop |
7517
b6743d7eb8d4
disabled auto-formatting of generated code
Doug Simon <doug.simon@oracle.com>
parents:
7509
diff
changeset
|
38 // @formatter:off |
7292
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
39 class Token { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
40 |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
41 public int kind; // token kind |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
42 public int pos; // token position in bytes in the source text (starting at 0) |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
43 public int charPos; // token position in characters in the source text (starting at 0) |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
44 public int col; // token column (starting at 1) |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
45 public int line; // token line (starting at 1) |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
46 public String val; // token value |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
47 public Token next; // ML 2005-03-11 Peek tokens are kept in linked list |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
48 } |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
49 |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
50 // ----------------------------------------------------------------------------------- |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
51 // Buffer |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
52 // ----------------------------------------------------------------------------------- |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
53 class Buffer { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
54 |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
55 // This Buffer supports the following cases: |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
56 // 1) seekable stream (file) |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
57 // a) whole stream in buffer |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
58 // b) part of stream in buffer |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
59 // 2) non seekable stream (network, console) |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
60 |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
61 public static final int EOF = Character.MAX_VALUE + 1; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
62 private static final int MIN_BUFFER_LENGTH = 1024; // 1KB |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
63 private static final int MAX_BUFFER_LENGTH = MIN_BUFFER_LENGTH * 64; // 64KB |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
64 private byte[] buf; // input buffer |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
65 private int bufStart; // position of first byte in buffer relative to input stream |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
66 private int bufLen; // length of buffer |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
67 private int fileLen; // length of input stream (may change if stream is no file) |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
68 private int bufPos; // current position in buffer |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
69 private RandomAccessFile file; // input stream (seekable) |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
70 private InputStream stream; // growing input stream (e.g.: console, network) |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
71 |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
72 public Buffer(InputStream s) { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
73 stream = s; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
74 fileLen = bufLen = bufStart = bufPos = 0; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
75 buf = new byte[MIN_BUFFER_LENGTH]; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
76 } |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
77 |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
78 public Buffer(String fileName) { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
79 try { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
80 file = new RandomAccessFile(fileName, "r"); |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
81 fileLen = (int) file.length(); |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
82 bufLen = Math.min(fileLen, MAX_BUFFER_LENGTH); |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
83 buf = new byte[bufLen]; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
84 bufStart = Integer.MAX_VALUE; // nothing in buffer so far |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
85 if (fileLen > 0) |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
86 setPos(0); // setup buffer to position 0 (start) |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
87 else |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
88 bufPos = 0; // index 0 is already after the file, thus setPos(0) is invalid |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
89 if (bufLen == fileLen) |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
90 Close(); |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
91 } catch (IOException e) { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
92 throw new FatalError("Could not open file " + fileName); |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
93 } |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
94 } |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
95 |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
96 // don't use b after this call anymore |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
97 // called in UTF8Buffer constructor |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
98 protected Buffer(Buffer b) { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
99 buf = b.buf; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
100 bufStart = b.bufStart; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
101 bufLen = b.bufLen; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
102 fileLen = b.fileLen; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
103 bufPos = b.bufPos; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
104 file = b.file; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
105 stream = b.stream; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
106 // keep finalize from closing the file |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
107 b.file = null; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
108 } |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
109 |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
110 @Override |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
111 protected void finalize() throws Throwable { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
112 super.finalize(); |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
113 Close(); |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
114 } |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
115 |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
116 protected void Close() { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
117 if (file != null) { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
118 try { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
119 file.close(); |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
120 file = null; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
121 } catch (IOException e) { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
122 throw new FatalError(e.getMessage()); |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
123 } |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
124 } |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
125 } |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
126 |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
127 public int Read() { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
128 if (bufPos < bufLen) { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
129 return buf[bufPos++] & 0xff; // mask out sign bits |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
130 } else if (getPos() < fileLen) { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
131 setPos(getPos()); // shift buffer start to pos |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
132 return buf[bufPos++] & 0xff; // mask out sign bits |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
133 } else if (stream != null && ReadNextStreamChunk() > 0) { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
134 return buf[bufPos++] & 0xff; // mask out sign bits |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
135 } else { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
136 return EOF; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
137 } |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
138 } |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
139 |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
140 public int Peek() { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
141 int curPos = getPos(); |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
142 int ch = Read(); |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
143 setPos(curPos); |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
144 return ch; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
145 } |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
146 |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
147 // beg .. begin, zero-based, inclusive, in byte |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
148 // end .. end, zero-based, exclusive, in byte |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
149 public String GetString(int beg, int end) { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
150 int len = 0; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
151 char[] buffer = new char[end - beg]; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
152 int oldPos = getPos(); |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
153 setPos(beg); |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
154 while (getPos() < end) |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
155 buffer[len++] = (char) Read(); |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
156 setPos(oldPos); |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
157 return new String(buffer, 0, len); |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
158 } |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
159 |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
160 public int getPos() { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
161 return bufPos + bufStart; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
162 } |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
163 |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
164 public void setPos(int value) { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
165 if (value >= fileLen && stream != null) { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
166 // Wanted position is after buffer and the stream |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
167 // is not seek-able e.g. network or console, |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
168 // thus we have to read the stream manually till |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
169 // the wanted position is in sight. |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
170 while (value >= fileLen && ReadNextStreamChunk() > 0) { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
171 // nothing to do... |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
172 } |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
173 } |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
174 |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
175 if (value < 0 || value > fileLen) { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
176 throw new FatalError("buffer out of bounds access, position: " + value); |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
177 } |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
178 |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
179 if (value >= bufStart && value < bufStart + bufLen) { // already in buffer |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
180 bufPos = value - bufStart; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
181 } else if (file != null) { // must be swapped in |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
182 try { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
183 file.seek(value); |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
184 bufLen = file.read(buf); |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
185 bufStart = value; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
186 bufPos = 0; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
187 } catch (IOException e) { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
188 throw new FatalError(e.getMessage()); |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
189 } |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
190 } else { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
191 // set the position to the end of the file, Pos will return fileLen. |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
192 bufPos = fileLen - bufStart; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
193 } |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
194 } |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
195 |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
196 // Read the next chunk of bytes from the stream, increases the buffer |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
197 // if needed and updates the fields fileLen and bufLen. |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
198 // Returns the number of bytes read. |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
199 private int ReadNextStreamChunk() { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
200 int free = buf.length - bufLen; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
201 if (free == 0) { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
202 // in the case of a growing input stream |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
203 // we can neither seek in the stream, nor can we |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
204 // foresee the maximum length, thus we must adapt |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
205 // the buffer size on demand. |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
206 byte[] newBuf = new byte[bufLen * 2]; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
207 System.arraycopy(buf, 0, newBuf, 0, bufLen); |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
208 buf = newBuf; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
209 free = bufLen; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
210 } |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
211 |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
212 int read; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
213 try { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
214 read = stream.read(buf, bufLen, free); |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
215 } catch (IOException ioex) { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
216 throw new FatalError(ioex.getMessage()); |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
217 } |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
218 |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
219 if (read > 0) { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
220 fileLen = bufLen = (bufLen + read); |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
221 return read; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
222 } |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
223 // end of stream reached |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
224 return 0; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
225 } |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
226 } |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
227 |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
228 // ----------------------------------------------------------------------------------- |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
229 // UTF8Buffer |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
230 // ----------------------------------------------------------------------------------- |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
231 class UTF8Buffer extends Buffer { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
232 |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
233 UTF8Buffer(Buffer b) { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
234 super(b); |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
235 } |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
236 |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
237 @Override |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
238 public int Read() { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
239 int ch; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
240 do { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
241 ch = super.Read(); |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
242 // until we find a utf8 start (0xxxxxxx or 11xxxxxx) |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
243 } while ((ch >= 128) && ((ch & 0xC0) != 0xC0) && (ch != EOF)); |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
244 if (ch < 128 || ch == EOF) { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
245 // nothing to do, first 127 chars are the same in ascii and utf8 |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
246 // 0xxxxxxx or end of file character |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
247 } else if ((ch & 0xF0) == 0xF0) { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
248 // 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
249 int c1 = ch & 0x07; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
250 ch = super.Read(); |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
251 int c2 = ch & 0x3F; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
252 ch = super.Read(); |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
253 int c3 = ch & 0x3F; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
254 ch = super.Read(); |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
255 int c4 = ch & 0x3F; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
256 ch = (((((c1 << 6) | c2) << 6) | c3) << 6) | c4; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
257 } else if ((ch & 0xE0) == 0xE0) { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
258 // 1110xxxx 10xxxxxx 10xxxxxx |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
259 int c1 = ch & 0x0F; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
260 ch = super.Read(); |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
261 int c2 = ch & 0x3F; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
262 ch = super.Read(); |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
263 int c3 = ch & 0x3F; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
264 ch = (((c1 << 6) | c2) << 6) | c3; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
265 } else if ((ch & 0xC0) == 0xC0) { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
266 // 110xxxxx 10xxxxxx |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
267 int c1 = ch & 0x1F; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
268 ch = super.Read(); |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
269 int c2 = ch & 0x3F; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
270 ch = (c1 << 6) | c2; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
271 } |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
272 return ch; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
273 } |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
274 } |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
275 |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
276 // ----------------------------------------------------------------------------------- |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
277 // StartStates -- maps characters to start states of tokens |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
278 // ----------------------------------------------------------------------------------- |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
279 class StartStates { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
280 |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
281 private static class Elem { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
282 |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
283 public int key, val; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
284 public Elem next; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
285 |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
286 public Elem(int key, int val) { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
287 this.key = key; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
288 this.val = val; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
289 } |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
290 } |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
291 |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
292 private Elem[] tab = new Elem[128]; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
293 |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
294 public void set(int key, int val) { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
295 Elem e = new Elem(key, val); |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
296 int k = key % 128; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
297 e.next = tab[k]; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
298 tab[k] = e; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
299 } |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
300 |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
301 public int state(int key) { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
302 Elem e = tab[key % 128]; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
303 while (e != null && e.key != key) |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
304 e = e.next; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
305 return e == null ? 0 : e.val; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
306 } |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
307 } |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
308 |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
309 // ----------------------------------------------------------------------------------- |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
310 // Scanner |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
311 // ----------------------------------------------------------------------------------- |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
312 @SuppressWarnings({"rawtypes", "unchecked"}) |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
313 public class Scanner { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
314 |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
315 static final char EOL = '\n'; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
316 static final int eofSym = 0; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
317 -->declarations |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
318 |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
319 public Buffer buffer; // scanner buffer |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
320 |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
321 Token t; // current token |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
322 int ch; // current input character |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
323 int pos; // byte position of current character |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
324 int charPos; // position by unicode characters starting with 0 |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
325 int col; // column number of current character |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
326 int line; // line number of current character |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
327 int oldEols; // EOLs that appeared in a comment; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
328 static final StartStates start; // maps initial token character to start state |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
329 static final Map literals; // maps literal strings to literal kinds |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
330 |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
331 Token tokens; // list of tokens already peeked (first token is a dummy) |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
332 Token pt; // current peek token |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
333 |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
334 char[] tval = new char[16]; // token text used in NextToken(), dynamically enlarged |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
335 int tlen; // length of current token |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
336 |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
337 static { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
338 start = new StartStates(); |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
339 literals = new HashMap(); |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
340 -->initialization |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
341 } |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
342 |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
343 public Scanner(String fileName) { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
344 buffer = new Buffer(fileName); |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
345 Init(); |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
346 } |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
347 |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
348 public Scanner(InputStream s) { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
349 buffer = new Buffer(s); |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
350 Init(); |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
351 } |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
352 |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
353 void Init() { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
354 pos = -1; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
355 line = 1; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
356 col = 0; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
357 charPos = -1; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
358 oldEols = 0; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
359 NextCh(); |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
360 if (ch == 0xEF) { // check optional byte order mark for UTF-8 |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
361 NextCh(); |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
362 int ch1 = ch; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
363 NextCh(); |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
364 int ch2 = ch; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
365 if (ch1 != 0xBB || ch2 != 0xBF) { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
366 throw new FatalError("Illegal byte order mark at start of file"); |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
367 } |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
368 buffer = new UTF8Buffer(buffer); |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
369 col = 0; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
370 charPos = -1; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
371 NextCh(); |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
372 } |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
373 pt = tokens = new Token(); // first token is a dummy |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
374 } |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
375 |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
376 void NextCh() { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
377 if (oldEols > 0) { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
378 ch = EOL; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
379 oldEols--; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
380 } else { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
381 pos = buffer.getPos(); |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
382 // buffer reads unicode chars, if UTF8 has been detected |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
383 ch = buffer.Read(); |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
384 col++; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
385 charPos++; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
386 // replace isolated '\r' by '\n' in order to make |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
387 // eol handling uniform across Windows, Unix and Mac |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
388 if (ch == '\r' && buffer.Peek() != '\n') |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
389 ch = EOL; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
390 if (ch == EOL) { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
391 line++; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
392 col = 0; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
393 } |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
394 } |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
395 -->casing |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
396 } |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
397 |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
398 void AddCh() { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
399 if (tlen >= tval.length) { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
400 char[] newBuf = new char[2 * tval.length]; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
401 System.arraycopy(tval, 0, newBuf, 0, tval.length); |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
402 tval = newBuf; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
403 } |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
404 if (ch != Buffer.EOF) { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
405 -->casing2 |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
406 NextCh(); |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
407 } |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
408 } |
7509 | 409 |
7292
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
410 -->comments |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
411 |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
412 void CheckLiteral() { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
413 String val = t.val; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
414 -->casing3 |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
415 Object kind = literals.get(val); |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
416 if (kind != null) { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
417 t.kind = ((Integer) kind).intValue(); |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
418 } |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
419 } |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
420 |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
421 Token NextToken() { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
422 while (ch == ' ' || |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
423 -->scan1 |
7509 | 424 ) NextCh(); |
7292
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
425 -->scan2 |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
426 int recKind = noSym; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
427 int recEnd = pos; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
428 t = new Token(); |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
429 t.pos = pos; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
430 t.col = col; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
431 t.line = line; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
432 t.charPos = charPos; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
433 int state = start.state(ch); |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
434 tlen = 0; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
435 AddCh(); |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
436 |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
437 loop: for (;;) { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
438 switch (state) { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
439 case -1: { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
440 t.kind = eofSym; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
441 break loop; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
442 } // NextCh already done |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
443 case 0: { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
444 if (recKind != noSym) { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
445 tlen = recEnd - t.pos; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
446 SetScannerBehindT(); |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
447 } |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
448 t.kind = recKind; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
449 break loop; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
450 } // NextCh already done |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
451 -->scan3 |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
452 } |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
453 } |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
454 t.val = new String(tval, 0, tlen); |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
455 return t; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
456 } |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
457 |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
458 private void SetScannerBehindT() { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
459 buffer.setPos(t.pos); |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
460 NextCh(); |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
461 line = t.line; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
462 col = t.col; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
463 charPos = t.charPos; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
464 for (int i = 0; i < tlen; i++) |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
465 NextCh(); |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
466 } |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
467 |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
468 // get the next token (possibly a token already seen during peeking) |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
469 public Token Scan() { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
470 if (tokens.next == null) { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
471 return NextToken(); |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
472 } else { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
473 pt = tokens = tokens.next; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
474 return tokens; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
475 } |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
476 } |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
477 |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
478 // get the next token, ignore pragmas |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
479 public Token Peek() { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
480 do { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
481 if (pt.next == null) { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
482 pt.next = NextToken(); |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
483 } |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
484 pt = pt.next; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
485 } while (pt.kind > maxT); // skip pragmas |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
486 |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
487 return pt; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
488 } |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
489 |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
490 // make sure that peeking starts at current scan position |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
491 public void ResetPeek() { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
492 pt = tokens; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
493 } |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
494 |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
495 // The following methods are used for the CLNG Editor and will be called with java.Reflection. |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
496 // If the editor won't be used these 3 functions are obsolete, |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
497 // otherwise changes within the signature of the methods will result in Syntax Highlighting not working properly |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
498 // anymore. |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
499 |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
500 // get the offset of the next Token |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
501 public int getPeekTokenOffset() { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
502 return pt.pos; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
503 } |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
504 |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
505 // get the String value of the Token |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
506 public String getPeekTokenVal() { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
507 return pt.val; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
508 } |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
509 |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
510 // get the Kind value of the Token |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
511 public int getPeekTokenKind() { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
512 return pt.kind; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
513 } |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
514 |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
515 } // end Scanner |