Mercurial > hg > graal-compiler
annotate graal/com.oracle.truffle.sl/src/com/oracle/truffle/sl/parser/Scanner.frame @ 10765:ae3d070ab223
make ValueNode.stamp() final, fix WordTypeRewriterPhase
author | Lukas Stadler <lukas.stadler@jku.at> |
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date | Mon, 15 Jul 2013 16:36:54 +0200 |
parents | b6743d7eb8d4 |
children | 71991b7a0f14 |
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1 /*------------------------------------------------------------------------- |
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2 Compiler Generator Coco/R, |
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3 Copyright (c) 1990, 2004 Hanspeter Moessenboeck, University of Linz |
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4 extended by M. Loeberbauer & A. Woess, Univ. of Linz |
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5 ported from C# to Java by Wolfgang Ahorner |
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6 with improvements by Pat Terry, Rhodes University |
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7 |
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8 This program is free software; you can redistribute it and/or modify it |
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9 under the terms of the GNU General Public License as published by the |
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10 Free Software Foundation; either version 2, or (at your option) any |
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11 later version. |
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12 |
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13 This program is distributed in the hope that it will be useful, but |
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14 WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
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15 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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16 for more details. |
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17 |
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18 You should have received a copy of the GNU General Public License along |
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19 with this program; if not, write to the Free Software Foundation, Inc., |
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20 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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21 |
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22 As an exception, it is allowed to write an extension of Coco/R that is |
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23 used as a plugin in non-free software. |
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24 |
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25 If not otherwise stated, any source code generated by Coco/R (other than |
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26 Coco/R itself) does not fall under the GNU General Public License. |
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27 ------------------------------------------------------------------------*/ |
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28 -->begin |
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29 import java.io.InputStream; |
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30 import java.io.IOException; |
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31 import java.io.RandomAccessFile; |
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32 import java.util.Map; |
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33 import java.util.HashMap; |
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34 |
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35 // Checkstyle: stop |
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36 // @formatter:off |
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37 class Token { |
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38 |
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39 public int kind; // token kind |
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40 public int pos; // token position in bytes in the source text (starting at 0) |
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41 public int charPos; // token position in characters in the source text (starting at 0) |
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42 public int col; // token column (starting at 1) |
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43 public int line; // token line (starting at 1) |
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44 public String val; // token value |
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45 public Token next; // ML 2005-03-11 Peek tokens are kept in linked list |
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46 } |
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47 |
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48 // ----------------------------------------------------------------------------------- |
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49 // Buffer |
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50 // ----------------------------------------------------------------------------------- |
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51 class Buffer { |
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52 |
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53 // This Buffer supports the following cases: |
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54 // 1) seekable stream (file) |
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55 // a) whole stream in buffer |
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56 // b) part of stream in buffer |
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57 // 2) non seekable stream (network, console) |
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58 |
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59 public static final int EOF = Character.MAX_VALUE + 1; |
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60 private static final int MIN_BUFFER_LENGTH = 1024; // 1KB |
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61 private static final int MAX_BUFFER_LENGTH = MIN_BUFFER_LENGTH * 64; // 64KB |
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62 private byte[] buf; // input buffer |
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63 private int bufStart; // position of first byte in buffer relative to input stream |
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64 private int bufLen; // length of buffer |
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65 private int fileLen; // length of input stream (may change if stream is no file) |
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66 private int bufPos; // current position in buffer |
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67 private RandomAccessFile file; // input stream (seekable) |
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68 private InputStream stream; // growing input stream (e.g.: console, network) |
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69 |
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70 public Buffer(InputStream s) { |
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71 stream = s; |
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72 fileLen = bufLen = bufStart = bufPos = 0; |
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73 buf = new byte[MIN_BUFFER_LENGTH]; |
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74 } |
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75 |
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76 public Buffer(String fileName) { |
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77 try { |
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78 file = new RandomAccessFile(fileName, "r"); |
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79 fileLen = (int) file.length(); |
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80 bufLen = Math.min(fileLen, MAX_BUFFER_LENGTH); |
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81 buf = new byte[bufLen]; |
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82 bufStart = Integer.MAX_VALUE; // nothing in buffer so far |
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83 if (fileLen > 0) |
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84 setPos(0); // setup buffer to position 0 (start) |
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85 else |
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86 bufPos = 0; // index 0 is already after the file, thus setPos(0) is invalid |
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87 if (bufLen == fileLen) |
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88 Close(); |
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89 } catch (IOException e) { |
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90 throw new FatalError("Could not open file " + fileName); |
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91 } |
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92 } |
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93 |
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94 // don't use b after this call anymore |
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95 // called in UTF8Buffer constructor |
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96 protected Buffer(Buffer b) { |
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97 buf = b.buf; |
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98 bufStart = b.bufStart; |
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99 bufLen = b.bufLen; |
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100 fileLen = b.fileLen; |
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101 bufPos = b.bufPos; |
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102 file = b.file; |
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103 stream = b.stream; |
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104 // keep finalize from closing the file |
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105 b.file = null; |
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106 } |
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107 |
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108 @Override |
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109 protected void finalize() throws Throwable { |
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110 super.finalize(); |
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111 Close(); |
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112 } |
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113 |
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114 protected void Close() { |
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115 if (file != null) { |
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116 try { |
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117 file.close(); |
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118 file = null; |
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119 } catch (IOException e) { |
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120 throw new FatalError(e.getMessage()); |
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121 } |
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122 } |
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123 } |
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124 |
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125 public int Read() { |
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126 if (bufPos < bufLen) { |
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127 return buf[bufPos++] & 0xff; // mask out sign bits |
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128 } else if (getPos() < fileLen) { |
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129 setPos(getPos()); // shift buffer start to pos |
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130 return buf[bufPos++] & 0xff; // mask out sign bits |
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131 } else if (stream != null && ReadNextStreamChunk() > 0) { |
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132 return buf[bufPos++] & 0xff; // mask out sign bits |
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133 } else { |
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134 return EOF; |
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135 } |
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136 } |
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137 |
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138 public int Peek() { |
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139 int curPos = getPos(); |
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140 int ch = Read(); |
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141 setPos(curPos); |
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142 return ch; |
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143 } |
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144 |
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145 // beg .. begin, zero-based, inclusive, in byte |
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146 // end .. end, zero-based, exclusive, in byte |
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147 public String GetString(int beg, int end) { |
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148 int len = 0; |
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149 char[] buffer = new char[end - beg]; |
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150 int oldPos = getPos(); |
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151 setPos(beg); |
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152 while (getPos() < end) |
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153 buffer[len++] = (char) Read(); |
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154 setPos(oldPos); |
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155 return new String(buffer, 0, len); |
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156 } |
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157 |
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158 public int getPos() { |
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159 return bufPos + bufStart; |
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160 } |
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161 |
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162 public void setPos(int value) { |
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163 if (value >= fileLen && stream != null) { |
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164 // Wanted position is after buffer and the stream |
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165 // is not seek-able e.g. network or console, |
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166 // thus we have to read the stream manually till |
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167 // the wanted position is in sight. |
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168 while (value >= fileLen && ReadNextStreamChunk() > 0) { |
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169 // nothing to do... |
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170 } |
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171 } |
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172 |
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173 if (value < 0 || value > fileLen) { |
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174 throw new FatalError("buffer out of bounds access, position: " + value); |
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175 } |
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176 |
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177 if (value >= bufStart && value < bufStart + bufLen) { // already in buffer |
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178 bufPos = value - bufStart; |
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179 } else if (file != null) { // must be swapped in |
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180 try { |
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181 file.seek(value); |
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182 bufLen = file.read(buf); |
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183 bufStart = value; |
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184 bufPos = 0; |
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185 } catch (IOException e) { |
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186 throw new FatalError(e.getMessage()); |
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187 } |
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188 } else { |
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189 // set the position to the end of the file, Pos will return fileLen. |
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190 bufPos = fileLen - bufStart; |
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191 } |
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192 } |
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193 |
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194 // Read the next chunk of bytes from the stream, increases the buffer |
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195 // if needed and updates the fields fileLen and bufLen. |
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196 // Returns the number of bytes read. |
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197 private int ReadNextStreamChunk() { |
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198 int free = buf.length - bufLen; |
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199 if (free == 0) { |
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200 // in the case of a growing input stream |
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201 // we can neither seek in the stream, nor can we |
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202 // foresee the maximum length, thus we must adapt |
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203 // the buffer size on demand. |
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204 byte[] newBuf = new byte[bufLen * 2]; |
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205 System.arraycopy(buf, 0, newBuf, 0, bufLen); |
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206 buf = newBuf; |
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207 free = bufLen; |
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208 } |
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209 |
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210 int read; |
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|
211 try { |
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212 read = stream.read(buf, bufLen, free); |
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213 } catch (IOException ioex) { |
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214 throw new FatalError(ioex.getMessage()); |
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215 } |
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216 |
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217 if (read > 0) { |
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218 fileLen = bufLen = (bufLen + read); |
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219 return read; |
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|
220 } |
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221 // end of stream reached |
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222 return 0; |
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|
223 } |
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224 } |
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225 |
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|
226 // ----------------------------------------------------------------------------------- |
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|
227 // UTF8Buffer |
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228 // ----------------------------------------------------------------------------------- |
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229 class UTF8Buffer extends Buffer { |
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230 |
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|
231 UTF8Buffer(Buffer b) { |
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232 super(b); |
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233 } |
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234 |
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|
235 @Override |
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|
236 public int Read() { |
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|
237 int ch; |
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|
238 do { |
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239 ch = super.Read(); |
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240 // until we find a utf8 start (0xxxxxxx or 11xxxxxx) |
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241 } while ((ch >= 128) && ((ch & 0xC0) != 0xC0) && (ch != EOF)); |
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242 if (ch < 128 || ch == EOF) { |
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243 // nothing to do, first 127 chars are the same in ascii and utf8 |
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244 // 0xxxxxxx or end of file character |
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245 } else if ((ch & 0xF0) == 0xF0) { |
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246 // 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx |
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247 int c1 = ch & 0x07; |
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parents:
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248 ch = super.Read(); |
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249 int c2 = ch & 0x3F; |
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250 ch = super.Read(); |
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251 int c3 = ch & 0x3F; |
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252 ch = super.Read(); |
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253 int c4 = ch & 0x3F; |
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254 ch = (((((c1 << 6) | c2) << 6) | c3) << 6) | c4; |
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255 } else if ((ch & 0xE0) == 0xE0) { |
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256 // 1110xxxx 10xxxxxx 10xxxxxx |
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257 int c1 = ch & 0x0F; |
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258 ch = super.Read(); |
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259 int c2 = ch & 0x3F; |
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260 ch = super.Read(); |
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261 int c3 = ch & 0x3F; |
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262 ch = (((c1 << 6) | c2) << 6) | c3; |
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263 } else if ((ch & 0xC0) == 0xC0) { |
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264 // 110xxxxx 10xxxxxx |
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265 int c1 = ch & 0x1F; |
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266 ch = super.Read(); |
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267 int c2 = ch & 0x3F; |
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268 ch = (c1 << 6) | c2; |
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269 } |
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270 return ch; |
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271 } |
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272 } |
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273 |
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274 // ----------------------------------------------------------------------------------- |
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275 // StartStates -- maps characters to start states of tokens |
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276 // ----------------------------------------------------------------------------------- |
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277 class StartStates { |
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278 |
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279 private static class Elem { |
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280 |
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281 public int key, val; |
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282 public Elem next; |
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283 |
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284 public Elem(int key, int val) { |
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285 this.key = key; |
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286 this.val = val; |
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287 } |
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288 } |
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289 |
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290 private Elem[] tab = new Elem[128]; |
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291 |
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292 public void set(int key, int val) { |
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293 Elem e = new Elem(key, val); |
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294 int k = key % 128; |
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295 e.next = tab[k]; |
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296 tab[k] = e; |
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297 } |
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298 |
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299 public int state(int key) { |
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300 Elem e = tab[key % 128]; |
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301 while (e != null && e.key != key) |
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302 e = e.next; |
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303 return e == null ? 0 : e.val; |
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304 } |
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305 } |
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306 |
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307 // ----------------------------------------------------------------------------------- |
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308 // Scanner |
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309 // ----------------------------------------------------------------------------------- |
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310 @SuppressWarnings({"rawtypes", "unchecked"}) |
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311 public class Scanner { |
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312 |
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313 static final char EOL = '\n'; |
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314 static final int eofSym = 0; |
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315 -->declarations |
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316 |
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317 public Buffer buffer; // scanner buffer |
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318 |
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319 Token t; // current token |
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320 int ch; // current input character |
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321 int pos; // byte position of current character |
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322 int charPos; // position by unicode characters starting with 0 |
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323 int col; // column number of current character |
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324 int line; // line number of current character |
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325 int oldEols; // EOLs that appeared in a comment; |
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326 static final StartStates start; // maps initial token character to start state |
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327 static final Map literals; // maps literal strings to literal kinds |
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328 |
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329 Token tokens; // list of tokens already peeked (first token is a dummy) |
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330 Token pt; // current peek token |
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331 |
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332 char[] tval = new char[16]; // token text used in NextToken(), dynamically enlarged |
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333 int tlen; // length of current token |
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334 |
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335 static { |
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336 start = new StartStates(); |
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337 literals = new HashMap(); |
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338 -->initialization |
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339 } |
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340 |
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341 public Scanner(String fileName) { |
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342 buffer = new Buffer(fileName); |
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343 Init(); |
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344 } |
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345 |
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346 public Scanner(InputStream s) { |
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347 buffer = new Buffer(s); |
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348 Init(); |
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349 } |
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350 |
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351 void Init() { |
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352 pos = -1; |
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353 line = 1; |
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354 col = 0; |
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355 charPos = -1; |
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356 oldEols = 0; |
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357 NextCh(); |
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358 if (ch == 0xEF) { // check optional byte order mark for UTF-8 |
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359 NextCh(); |
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360 int ch1 = ch; |
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361 NextCh(); |
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362 int ch2 = ch; |
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363 if (ch1 != 0xBB || ch2 != 0xBF) { |
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364 throw new FatalError("Illegal byte order mark at start of file"); |
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365 } |
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366 buffer = new UTF8Buffer(buffer); |
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367 col = 0; |
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368 charPos = -1; |
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369 NextCh(); |
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370 } |
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371 pt = tokens = new Token(); // first token is a dummy |
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372 } |
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373 |
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374 void NextCh() { |
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|
375 if (oldEols > 0) { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
376 ch = EOL; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
377 oldEols--; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
378 } else { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
379 pos = buffer.getPos(); |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
380 // 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
|
381 ch = buffer.Read(); |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
382 col++; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
383 charPos++; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
384 // 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
|
385 // 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
|
386 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
|
387 ch = EOL; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
388 if (ch == EOL) { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
389 line++; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
390 col = 0; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
391 } |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
392 } |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
393 -->casing |
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 |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
396 void AddCh() { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
397 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
|
398 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
|
399 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
|
400 tval = newBuf; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
401 } |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
402 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
|
403 -->casing2 |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
404 NextCh(); |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
405 } |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
406 } |
7509 | 407 |
7292
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
408 -->comments |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
409 |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
410 void CheckLiteral() { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
411 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
|
412 -->casing3 |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
413 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
|
414 if (kind != null) { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
415 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
|
416 } |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
417 } |
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 Token NextToken() { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
420 while (ch == ' ' || |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
421 -->scan1 |
7509 | 422 ) NextCh(); |
7292
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
423 -->scan2 |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
424 int recKind = noSym; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
425 int recEnd = pos; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
426 t = new Token(); |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
427 t.pos = pos; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
428 t.col = col; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
429 t.line = line; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
430 t.charPos = charPos; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
431 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
|
432 tlen = 0; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
433 AddCh(); |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
434 |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
435 loop: for (;;) { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
436 switch (state) { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
437 case -1: { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
438 t.kind = eofSym; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
439 break loop; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
440 } // NextCh already done |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
441 case 0: { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
442 if (recKind != noSym) { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
443 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
|
444 SetScannerBehindT(); |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
445 } |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
446 t.kind = recKind; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
447 break loop; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
448 } // NextCh already done |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
449 -->scan3 |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
450 } |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
451 } |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
452 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
|
453 return t; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
454 } |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
455 |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
456 private void SetScannerBehindT() { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
457 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
|
458 NextCh(); |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
459 line = t.line; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
460 col = t.col; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
461 charPos = t.charPos; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
462 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
|
463 NextCh(); |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
464 } |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
465 |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
466 // 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
|
467 public Token Scan() { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
468 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
|
469 return NextToken(); |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
470 } else { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
471 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
|
472 return tokens; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
473 } |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
474 } |
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 // 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
|
477 public Token Peek() { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
478 do { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
479 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
|
480 pt.next = NextToken(); |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
481 } |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
482 pt = pt.next; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
483 } 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
|
484 |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
485 return pt; |
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 |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
488 // 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
|
489 public void ResetPeek() { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
490 pt = tokens; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
491 } |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
492 |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
493 // 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
|
494 // 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
|
495 // 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
|
496 // anymore. |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
497 |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
498 // 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
|
499 public int getPeekTokenOffset() { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
500 return pt.pos; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
501 } |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
502 |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
503 // 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
|
504 public String getPeekTokenVal() { |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
|
505 return pt.val; |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
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506 } |
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Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
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507 |
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Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
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508 // get the Kind value of the Token |
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Simple Language: A simple dynamic programming language to demonstrate Truffle features
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509 public int getPeekTokenKind() { |
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Simple Language: A simple dynamic programming language to demonstrate Truffle features
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510 return pt.kind; |
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Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
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511 } |
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Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
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512 |
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Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
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513 } // end Scanner |