1 | package antlr.preprocessor; |
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2 | |
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3 | /* ANTLR Translator Generator |
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4 | * Project led by Terence Parr at http://www.cs.usfca.edu |
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5 | * Software rights: http://www.antlr.org/license.html |
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6 | * |
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7 | * $Id: //depot/code/org.antlr/release/antlr-2.7.7/antlr/preprocessor/Tool.java#2 $ |
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8 | */ |
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9 | |
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10 | import java.io.*; |
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11 | import antlr.collections.impl.Vector; |
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12 | import java.util.Enumeration; |
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13 | |
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14 | /** Tester for the preprocessor */ |
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15 | public class Tool { |
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16 | protected Hierarchy theHierarchy; |
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17 | protected String grammarFileName; |
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18 | protected String[] args; |
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19 | protected int nargs; // how many args in new args list |
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20 | protected Vector grammars; |
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21 | protected antlr.Tool antlrTool; |
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22 | |
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23 | public Tool(antlr.Tool t, String[] args) { |
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24 | antlrTool = t; |
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25 | processArguments(args); |
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26 | } |
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27 | |
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28 | public static void main(String[] args) { |
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29 | antlr.Tool antlrTool = new antlr.Tool(); |
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30 | Tool theTool = new Tool(antlrTool, args); |
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31 | theTool.preprocess(); |
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32 | String[] a = theTool.preprocessedArgList(); |
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33 | for (int i = 0; i < a.length; i++) { |
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34 | System.out.print(" " + a[i]); |
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35 | } |
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36 | System.out.println(); |
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37 | } |
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38 | |
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39 | public boolean preprocess() { |
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40 | if (grammarFileName == null) { |
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41 | antlrTool.toolError("no grammar file specified"); |
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42 | return false; |
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43 | } |
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44 | if (grammars != null) { |
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45 | theHierarchy = new Hierarchy(antlrTool); |
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46 | for (Enumeration e = grammars.elements(); e.hasMoreElements();) { |
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47 | String f = (String)e.nextElement(); |
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48 | try { |
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49 | theHierarchy.readGrammarFile(f); |
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50 | } |
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51 | catch (FileNotFoundException fe) { |
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52 | antlrTool.toolError("file " + f + " not found"); |
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53 | return false; |
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54 | } |
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55 | } |
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56 | } |
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57 | |
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58 | // do the actual inheritance stuff |
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59 | boolean complete = theHierarchy.verifyThatHierarchyIsComplete(); |
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60 | if (!complete) |
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61 | return false; |
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62 | theHierarchy.expandGrammarsInFile(grammarFileName); |
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63 | GrammarFile gf = theHierarchy.getFile(grammarFileName); |
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64 | String expandedFileName = gf.nameForExpandedGrammarFile(grammarFileName); |
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65 | |
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66 | // generate the output file if necessary |
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67 | if (expandedFileName.equals(grammarFileName)) { |
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68 | args[nargs++] = grammarFileName; // add to argument list |
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69 | } |
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70 | else { |
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71 | try { |
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72 | gf.generateExpandedFile(); // generate file to feed ANTLR |
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73 | args[nargs++] = antlrTool.getOutputDirectory() + |
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74 | System.getProperty("file.separator") + |
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75 | expandedFileName; // add to argument list |
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76 | } |
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77 | catch (IOException io) { |
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78 | antlrTool.toolError("cannot write expanded grammar file " + expandedFileName); |
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79 | return false; |
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80 | } |
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81 | } |
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82 | return true; |
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83 | } |
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84 | |
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85 | /** create new arg list with correct length to pass to ANTLR */ |
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86 | public String[] preprocessedArgList() { |
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87 | String[] a = new String[nargs]; |
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88 | System.arraycopy(args, 0, a, 0, nargs); |
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89 | args = a; |
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90 | return args; |
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91 | } |
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92 | |
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93 | /** Process -glib options and grammar file. Create a new args list |
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94 | * that does not contain the -glib option. The grammar file name |
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95 | * might be modified and, hence, is not added yet to args list. |
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96 | */ |
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97 | private void processArguments(String[] incomingArgs) { |
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98 | this.nargs = 0; |
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99 | this.args = new String[incomingArgs.length]; |
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100 | for (int i = 0; i < incomingArgs.length; i++) { |
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101 | if ( incomingArgs[i].length() == 0 ) |
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102 | { |
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103 | antlrTool.warning("Zero length argument ignoring..."); |
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104 | continue; |
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105 | } |
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106 | if (incomingArgs[i].equals("-glib")) { |
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107 | // if on a pc and they use a '/', warn them |
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108 | if (File.separator.equals("\\") && |
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109 | incomingArgs[i].indexOf('/') != -1) { |
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110 | antlrTool.warning("-glib cannot deal with '/' on a PC: use '\\'; ignoring..."); |
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111 | } |
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112 | else { |
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113 | grammars = antlrTool.parseSeparatedList(incomingArgs[i + 1], ';'); |
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114 | i++; |
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115 | } |
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116 | } |
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117 | else if (incomingArgs[i].equals("-o")) { |
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118 | args[this.nargs++] = incomingArgs[i]; |
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119 | if (i + 1 >= incomingArgs.length) { |
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120 | antlrTool.error("missing output directory with -o option; ignoring"); |
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121 | } |
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122 | else { |
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123 | i++; |
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124 | args[this.nargs++] = incomingArgs[i]; |
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125 | antlrTool.setOutputDirectory(incomingArgs[i]); |
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126 | } |
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127 | } |
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128 | else if (incomingArgs[i].charAt(0) == '-') { |
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129 | args[this.nargs++] = incomingArgs[i]; |
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130 | } |
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131 | else { |
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132 | // Must be the grammar file |
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133 | grammarFileName = incomingArgs[i]; |
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134 | if (grammars == null) { |
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135 | grammars = new Vector(10); |
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136 | } |
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137 | grammars.appendElement(grammarFileName); // process it too |
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138 | if ((i + 1) < incomingArgs.length) { |
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139 | antlrTool.warning("grammar file must be last; ignoring other arguments..."); |
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140 | break; |
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141 | } |
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142 | } |
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143 | } |
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144 | } |
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145 | } |
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