1 | /* |
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2 | * FaslReader.java |
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3 | * |
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4 | * Copyright (C) 2005 Peter Graves |
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5 | * $Id: FaslReader.java 12254 2009-11-06 20:07:54Z ehuelsmann $ |
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6 | * |
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7 | * This program is free software; you can redistribute it and/or |
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8 | * modify it under the terms of the GNU General Public License |
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9 | * as published by the Free Software Foundation; either version 2 |
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10 | * of the License, or (at your option) any later version. |
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11 | * |
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12 | * This program is distributed in the hope that it will be useful, |
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13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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15 | * GNU General Public License for more details. |
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16 | * |
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17 | * You should have received a copy of the GNU General Public License |
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18 | * along with this program; if not, write to the Free Software |
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19 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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20 | * |
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21 | * As a special exception, the copyright holders of this library give you |
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22 | * permission to link this library with independent modules to produce an |
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23 | * executable, regardless of the license terms of these independent |
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24 | * modules, and to copy and distribute the resulting executable under |
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25 | * terms of your choice, provided that you also meet, for each linked |
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26 | * independent module, the terms and conditions of the license of that |
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27 | * module. An independent module is a module which is not derived from |
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28 | * or based on this library. If you modify this library, you may extend |
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29 | * this exception to your version of the library, but you are not |
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30 | * obligated to do so. If you do not wish to do so, delete this |
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31 | * exception statement from your version. |
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32 | */ |
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33 | |
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34 | package org.armedbear.lisp; |
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35 | |
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36 | public final class FaslReader extends Lisp |
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37 | { |
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38 | // ### fasl-read-comment |
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39 | public static final ReaderMacroFunction FASL_READ_COMMENT = |
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40 | new ReaderMacroFunction("fasl-read-comment", PACKAGE_SYS, false, |
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41 | "stream character") |
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42 | { |
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43 | @Override |
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44 | public LispObject execute(Stream stream, char ignored) |
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45 | |
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46 | { |
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47 | try |
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48 | { |
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49 | while (true) { |
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50 | int n = stream._readChar(); |
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51 | if (n < 0) |
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52 | return null; |
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53 | if (n == '\n') |
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54 | return null; |
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55 | } |
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56 | } |
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57 | catch (java.io.IOException e) |
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58 | { |
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59 | return null; |
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60 | } |
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61 | } |
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62 | }; |
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63 | |
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64 | // ### fasl-read-string |
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65 | public static final ReaderMacroFunction FASL_READ_STRING = |
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66 | new ReaderMacroFunction("fasl-read-string", PACKAGE_SYS, false, |
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67 | "stream character") |
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68 | { |
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69 | @Override |
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70 | public LispObject execute(Stream stream, char terminator) |
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71 | |
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72 | { |
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73 | final Readtable rt = FaslReadtable.getInstance(); |
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74 | FastStringBuffer sb = new FastStringBuffer(); |
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75 | try |
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76 | { |
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77 | while (true) { |
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78 | int n = stream._readChar(); |
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79 | if (n < 0) { |
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80 | error(new EndOfFile(stream)); |
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81 | // Not reached. |
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82 | return null; |
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83 | } |
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84 | char c = (char) n; |
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85 | if (rt.getSyntaxType(c) == Readtable.SYNTAX_TYPE_SINGLE_ESCAPE) { |
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86 | // Single escape. |
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87 | n = stream._readChar(); |
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88 | if (n < 0) { |
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89 | error(new EndOfFile(stream)); |
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90 | // Not reached. |
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91 | return null; |
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92 | } |
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93 | sb.append((char)n); |
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94 | continue; |
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95 | } |
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96 | if (Utilities.isPlatformWindows) { |
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97 | if (c == '\r') { |
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98 | n = stream._readChar(); |
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99 | if (n < 0) { |
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100 | error(new EndOfFile(stream)); |
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101 | // Not reached. |
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102 | return null; |
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103 | } |
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104 | if (n == '\n') { |
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105 | sb.append('\n'); |
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106 | } else { |
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107 | // '\r' was not followed by '\n'. |
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108 | stream._unreadChar(n); |
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109 | sb.append('\r'); |
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110 | } |
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111 | continue; |
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112 | } |
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113 | } |
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114 | if (c == terminator) |
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115 | break; |
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116 | // Default. |
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117 | sb.append(c); |
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118 | } |
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119 | return new SimpleString(sb); |
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120 | } |
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121 | catch (java.io.IOException e) |
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122 | { |
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123 | return new SimpleString(sb); |
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124 | // return null; |
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125 | } |
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126 | } |
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127 | }; |
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128 | |
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129 | // ### fasl-read-list |
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130 | public static final ReaderMacroFunction FASL_READ_LIST = |
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131 | new ReaderMacroFunction("fasl-read-list", PACKAGE_SYS, false, |
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132 | "stream character") |
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133 | { |
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134 | @Override |
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135 | public LispObject execute(Stream stream, char ignored) |
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136 | |
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137 | { |
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138 | return stream.readList(false, true); |
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139 | } |
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140 | }; |
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141 | |
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142 | // ### fasl-read-right-paren |
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143 | public static final ReaderMacroFunction FASL_READ_RIGHT_PAREN = |
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144 | new ReaderMacroFunction("fasl-read-right-paren", PACKAGE_SYS, false, |
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145 | "stream character") |
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146 | { |
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147 | @Override |
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148 | public LispObject execute(Stream stream, char ignored) |
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149 | |
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150 | { |
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151 | return error(new ReaderError("Unmatched right parenthesis.", stream)); |
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152 | } |
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153 | }; |
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154 | |
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155 | // ### fasl-read-quote |
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156 | public static final ReaderMacroFunction FASL_READ_QUOTE = |
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157 | new ReaderMacroFunction("fasl-read-quote", PACKAGE_SYS, false, |
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158 | "stream character") |
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159 | { |
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160 | @Override |
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161 | public LispObject execute(Stream stream, char ignored) |
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162 | |
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163 | { |
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164 | return new Cons(Symbol.QUOTE, |
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165 | new Cons(stream.faslRead(true, NIL, true, |
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166 | LispThread.currentThread()))); |
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167 | } |
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168 | }; |
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169 | |
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170 | // ### fasl-read-dispatch-char |
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171 | public static final ReaderMacroFunction FASL_READ_DISPATCH_CHAR = |
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172 | new ReaderMacroFunction("fasl-read-dispatch-char", PACKAGE_SYS, false, |
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173 | "stream character") |
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174 | { |
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175 | @Override |
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176 | public LispObject execute(Stream stream, char c) |
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177 | |
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178 | { |
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179 | return stream.readDispatchChar(c, true); |
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180 | } |
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181 | }; |
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182 | |
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183 | // ### fasl-sharp-left-paren |
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184 | public static final DispatchMacroFunction FASL_SHARP_LEFT_PAREN = |
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185 | new DispatchMacroFunction("fasl-sharp-left-paren", PACKAGE_SYS, false, |
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186 | "stream sub-char numarg") |
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187 | { |
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188 | @Override |
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189 | public LispObject execute(Stream stream, char c, int n) |
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190 | |
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191 | { |
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192 | final LispThread thread = LispThread.currentThread(); |
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193 | LispObject list = stream.readList(true, true); |
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194 | if (_BACKQUOTE_COUNT_.symbolValue(thread).zerop()) { |
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195 | if (n >= 0) { |
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196 | LispObject[] array = new LispObject[n]; |
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197 | for (int i = 0; i < n; i++) { |
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198 | array[i] = list.car(); |
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199 | if (list.cdr() != NIL) |
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200 | list = list.cdr(); |
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201 | } |
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202 | return new SimpleVector(array); |
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203 | } else |
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204 | return new SimpleVector(list); |
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205 | } |
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206 | return new Cons(_BQ_VECTOR_FLAG_.symbolValue(thread), list); |
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207 | } |
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208 | }; |
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209 | |
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210 | // ### fasl-sharp-star |
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211 | public static final DispatchMacroFunction FASL_SHARP_STAR = |
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212 | new DispatchMacroFunction("fasl-sharp-star", PACKAGE_SYS, false, |
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213 | "stream sub-char numarg") |
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214 | { |
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215 | @Override |
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216 | public LispObject execute(Stream stream, char ignored, int n) |
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217 | |
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218 | { |
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219 | final LispThread thread = LispThread.currentThread(); |
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220 | final Readtable rt = FaslReadtable.getInstance(); |
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221 | final boolean suppress = |
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222 | (Symbol.READ_SUPPRESS.symbolValue(thread) != NIL); |
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223 | FastStringBuffer sb = new FastStringBuffer(); |
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224 | try |
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225 | { |
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226 | while (true) { |
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227 | int ch = stream._readChar(); |
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228 | if (ch < 0) |
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229 | break; |
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230 | char c = (char) ch; |
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231 | if (c == '0' || c == '1') |
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232 | sb.append(c); |
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233 | else { |
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234 | int syntaxType = rt.getSyntaxType(c); |
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235 | if (syntaxType == Readtable.SYNTAX_TYPE_WHITESPACE || |
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236 | syntaxType == Readtable.SYNTAX_TYPE_TERMINATING_MACRO) { |
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237 | stream._unreadChar(c); |
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238 | break; |
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239 | } else if (!suppress) { |
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240 | String name = LispCharacter.charToName(c); |
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241 | if (name == null) |
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242 | name = "#\\" + c; |
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243 | error(new ReaderError("Illegal element for bit-vector: " + name, |
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244 | stream)); |
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245 | } |
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246 | } |
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247 | } |
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248 | } |
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249 | catch (java.io.IOException e) |
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250 | { |
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251 | error(new ReaderError("IO error: ", |
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252 | stream)); |
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253 | return NIL; |
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254 | } |
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255 | |
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256 | if (suppress) |
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257 | return NIL; |
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258 | if (n >= 0) { |
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259 | // n was supplied. |
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260 | final int length = sb.length(); |
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261 | if (length == 0) { |
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262 | if (n > 0) |
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263 | return error(new ReaderError("No element specified for bit vector of length " + |
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264 | n + '.', |
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265 | stream)); |
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266 | } |
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267 | if (n > length) { |
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268 | final char c = sb.charAt(length - 1); |
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269 | for (int i = length; i < n; i++) |
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270 | sb.append(c); |
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271 | } else if (n < length) { |
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272 | return error(new ReaderError("Bit vector is longer than specified length: #" + |
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273 | n + '*' + sb.toString(), |
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274 | stream)); |
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275 | } |
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276 | } |
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277 | return new SimpleBitVector(sb.toString()); |
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278 | } |
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279 | }; |
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280 | |
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281 | // ### fasl-sharp-dot |
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282 | public static final DispatchMacroFunction FASL_SHARP_DOT = |
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283 | new DispatchMacroFunction("fasl-sharp-dot", PACKAGE_SYS, false, |
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284 | "stream sub-char numarg") |
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285 | { |
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286 | @Override |
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287 | public LispObject execute(Stream stream, char c, int n) |
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288 | |
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289 | { |
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290 | final LispThread thread = LispThread.currentThread(); |
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291 | if (Symbol.READ_EVAL.symbolValue(thread) == NIL) |
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292 | return error(new ReaderError("Can't read #. when *READ-EVAL* is NIL.", |
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293 | stream)); |
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294 | else |
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295 | return eval(stream.faslRead(true, NIL, true, thread), |
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296 | new Environment(), thread); |
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297 | } |
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298 | }; |
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299 | |
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300 | // ### fasl-sharp-colon |
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301 | public static final DispatchMacroFunction FASL_SHARP_COLON = |
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302 | new DispatchMacroFunction("fasl-sharp-colon", PACKAGE_SYS, false, |
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303 | "stream sub-char numarg") |
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304 | { |
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305 | @Override |
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306 | public LispObject execute(Stream stream, char c, int n) |
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307 | |
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308 | { |
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309 | LispThread thread = LispThread.currentThread(); |
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310 | Symbol symbol = (Symbol) stream.readSymbol(FaslReadtable.getInstance()); |
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311 | LispObject pkg = Load._FASL_ANONYMOUS_PACKAGE_.symbolValue(thread); |
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312 | Debug.assertTrue(pkg != NIL); |
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313 | symbol = ((Package)pkg).intern(symbol.getName()); |
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314 | symbol.setPackage(NIL); |
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315 | return symbol; |
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316 | } |
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317 | }; |
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318 | |
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319 | // ### fasl-sharp-a |
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320 | public static final DispatchMacroFunction FASL_SHARP_A = |
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321 | new DispatchMacroFunction("fasl-sharp-a", PACKAGE_SYS, false, |
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322 | "stream sub-char numarg") |
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323 | { |
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324 | @Override |
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325 | public LispObject execute(Stream stream, char c, int n) |
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326 | |
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327 | { |
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328 | return stream.faslReadArray(n); |
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329 | } |
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330 | }; |
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331 | |
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332 | // ### fasl-sharp-b |
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333 | public static final DispatchMacroFunction FASL_SHARP_B = |
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334 | new DispatchMacroFunction("fasl-sharp-b", PACKAGE_SYS, false, |
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335 | "stream sub-char numarg") |
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336 | { |
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337 | @Override |
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338 | public LispObject execute(Stream stream, char c, int n) |
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339 | |
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340 | { |
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341 | return stream.faslReadRadix(2); |
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342 | } |
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343 | }; |
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344 | |
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345 | // ### fasl-sharp-c |
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346 | public static final DispatchMacroFunction FASL_SHARP_C = |
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347 | new DispatchMacroFunction("fasl-sharp-c", PACKAGE_SYS, false, |
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348 | "stream sub-char numarg") |
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349 | { |
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350 | @Override |
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351 | public LispObject execute(Stream stream, char c, int n) |
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352 | |
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353 | { |
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354 | return stream.faslReadComplex(); |
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355 | } |
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356 | }; |
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357 | |
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358 | // ### fasl-sharp-o |
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359 | public static final DispatchMacroFunction FASL_SHARP_O = |
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360 | new DispatchMacroFunction("fasl-sharp-o", PACKAGE_SYS, false, |
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361 | "stream sub-char numarg") |
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362 | { |
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363 | @Override |
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364 | public LispObject execute(Stream stream, char c, int n) |
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365 | |
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366 | { |
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367 | return stream.faslReadRadix(8); |
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368 | } |
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369 | }; |
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370 | |
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371 | // ### fasl-sharp-p |
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372 | public static final DispatchMacroFunction FASL_SHARP_P = |
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373 | new DispatchMacroFunction("fasl-sharp-p", PACKAGE_SYS, false, |
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374 | "stream sub-char numarg") |
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375 | { |
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376 | @Override |
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377 | public LispObject execute(Stream stream, char c, int n) |
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378 | |
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379 | { |
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380 | return stream.faslReadPathname(); |
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381 | } |
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382 | }; |
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383 | |
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384 | // ### fasl-sharp-r |
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385 | public static final DispatchMacroFunction FASL_SHARP_R = |
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386 | new DispatchMacroFunction("fasl-sharp-r", PACKAGE_SYS, false, |
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387 | "stream sub-char numarg") |
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388 | { |
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389 | @Override |
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390 | public LispObject execute(Stream stream, char c, int n) |
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391 | |
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392 | { |
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393 | return stream.faslReadRadix(n); |
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394 | } |
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395 | }; |
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396 | |
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397 | // ### fasl-sharp-s |
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398 | public static final DispatchMacroFunction FASL_SHARP_S = |
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399 | new DispatchMacroFunction("fasl-sharp-s", PACKAGE_SYS, false, |
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400 | "stream sub-char numarg") |
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401 | { |
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402 | @Override |
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403 | public LispObject execute(Stream stream, char c, int n) |
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404 | |
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405 | { |
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406 | return stream.readStructure(); |
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407 | } |
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408 | }; |
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409 | |
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410 | // ### fasl-sharp-x |
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411 | public static final DispatchMacroFunction FASL_SHARP_X = |
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412 | new DispatchMacroFunction("fasl-sharp-x", PACKAGE_SYS, false, |
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413 | "stream sub-char numarg") |
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414 | { |
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415 | @Override |
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416 | public LispObject execute(Stream stream, char c, int n) |
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417 | |
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418 | { |
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419 | return stream.faslReadRadix(16); |
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420 | } |
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421 | }; |
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422 | |
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423 | // ### fasl-sharp-quote |
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424 | public static final DispatchMacroFunction FASL_SHARP_QUOTE = |
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425 | new DispatchMacroFunction("fasl-sharp-quote", PACKAGE_SYS, false, |
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426 | "stream sub-char numarg") |
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427 | { |
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428 | @Override |
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429 | public LispObject execute(Stream stream, char c, int n) |
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430 | |
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431 | { |
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432 | return new Cons(Symbol.FUNCTION, |
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433 | new Cons(stream.faslRead(true, NIL, true, |
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434 | LispThread.currentThread()))); |
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435 | } |
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436 | }; |
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437 | |
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438 | // ### fasl-sharp-backslash |
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439 | public static final DispatchMacroFunction FASL_SHARP_BACKSLASH = |
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440 | new DispatchMacroFunction("fasl-sharp-backslash", PACKAGE_SYS, false, |
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441 | "stream sub-char numarg") |
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442 | { |
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443 | @Override |
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444 | public LispObject execute(Stream stream, char c, int n) |
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445 | |
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446 | { |
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447 | return stream.readCharacterLiteral(FaslReadtable.getInstance(), |
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448 | LispThread.currentThread()); |
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449 | } |
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450 | }; |
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451 | |
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452 | // ### fasl-sharp-vertical-bar |
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453 | public static final DispatchMacroFunction FASL_SHARP_VERTICAL_BAR = |
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454 | new DispatchMacroFunction("sharp-vertical-bar", PACKAGE_SYS, false, |
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455 | "stream sub-char numarg") |
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456 | { |
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457 | @Override |
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458 | public LispObject execute(Stream stream, char c, int n) |
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459 | |
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460 | { |
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461 | stream.skipBalancedComment(); |
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462 | return null; |
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463 | } |
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464 | }; |
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465 | |
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466 | // ### fasl-sharp-illegal |
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467 | public static final DispatchMacroFunction FASL_SHARP_ILLEGAL = |
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468 | new DispatchMacroFunction("fasl-sharp-illegal", PACKAGE_SYS, false, |
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469 | "stream sub-char numarg") |
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470 | { |
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471 | @Override |
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472 | public LispObject execute(Stream stream, char c, int n) |
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473 | |
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474 | { |
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475 | FastStringBuffer sb = |
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476 | new FastStringBuffer("Illegal # macro character: #\\"); |
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477 | String s = LispCharacter.charToName(c); |
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478 | if (s != null) |
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479 | sb.append(s); |
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480 | else |
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481 | sb.append(c); |
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482 | return error(new ReaderError(sb.toString(), stream)); |
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483 | } |
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484 | }; |
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485 | } |
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