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annotate src/luan/lib/IoLib.java @ 118:735708619119

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add Debug.debug() git-svn-id: https://luan-java.googlecode.com/svn/trunk@119 21e917c8-12df-6dd8-5cb6-c86387c605b9
author fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
date Sun, 01 Jun 2014 07:07:31 +0000
parents 1ff1c32417eb
children d00f41edbbd6
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1 package luan.lib;
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2
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3 import java.io.InputStream;
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4 import java.io.OutputStream;
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5 import java.io.PrintStream;
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6 import java.io.Reader;
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7 import java.io.Writer;
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8 import java.io.FileReader;
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9 import java.io.FileWriter;
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10 import java.io.BufferedReader;
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11 import java.io.File;
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12 import java.io.FileInputStream;
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13 import java.io.FileOutputStream;
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14 import java.io.InputStreamReader;
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15 import java.io.IOException;
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16 import java.net.URL;
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17 import java.net.MalformedURLException;
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18 import luan.LuanState;
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19 import luan.LuanTable;
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20 import luan.LuanFunction;
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21 import luan.LuanJavaFunction;
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22 import luan.LuanException;
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25 public final class IoLib {
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27 public static final String NAME = "Io";
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29 public static final LuanFunction LOADER = new LuanFunction() {
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30 @Override public Object call(LuanState luan,Object[] args) {
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31 LuanTable module = new LuanTable();
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32 try {
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33 add( module, "file", String.class );
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34 add( module, "java_resource_to_url", String.class );
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35 add( module, "url", String.class );
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36 add( module, "java_resource", String.class );
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735708619119 add Debug.debug()
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37 add( module, "read_console_line", String.class );
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39 LuanTable stdin = new LuanTable();
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40 stdin.put( "read_text", new LuanJavaFunction(
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41 IoLib.class.getMethod( "stdin_read_text" ), null
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42 ) );
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43 stdin.put( "read_binary", new LuanJavaFunction(
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44 IoLib.class.getMethod( "stdin_read_binary" ), null
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45 ) );
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46 stdin.put( "read_lines", new LuanJavaFunction(
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47 IoLib.class.getMethod( "stdin_read_lines" ), null
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48 ) );
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49 stdin.put( "read_blocks", new LuanJavaFunction(
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50 IoLib.class.getMethod( "stdin_read_blocks", Integer.class ), null
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51 ) );
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52 module.put( "stdin", stdin );
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53 } catch(NoSuchMethodException e) {
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54 throw new RuntimeException(e);
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55 }
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56 module.put( "stdout", writer(System.out) );
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57 module.put( "stderr", writer(System.err) );
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58 return module;
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59 }
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60 };
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62 private static void add(LuanTable t,String method,Class<?>... parameterTypes) throws NoSuchMethodException {
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63 t.put( method, new LuanJavaFunction(IoLib.class.getMethod(method,parameterTypes),null) );
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64 }
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65
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66 public static final class LuanFile {
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67 private final File file;
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68
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69 private LuanFile(String name) {
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70 this.file = new File(name);
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71 }
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73 public String read_text() throws IOException {
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74 return Utils.read(file);
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75 }
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76
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77 public byte[] read_binary() throws IOException {
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78 return Utils.readAll(file);
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79 }
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81 public void write(LuanState luan,Object obj) throws LuanException, IOException {
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82 if( obj instanceof String ) {
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83 String s = (String)obj;
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84 Utils.write(file,s);
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85 return;
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86 }
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87 if( obj instanceof byte[] ) {
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88 byte[] a = (byte[])obj;
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89 Utils.writeAll(file,a);
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90 return;
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91 }
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92 throw luan.JAVA.exception( "bad argument #1 to 'write' (string or binary expected)" );
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93 }
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94
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95 public LuanTable text_writer() throws IOException {
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96 return writer(new FileWriter(file));
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97 }
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99 public LuanTable binary_writer() throws IOException {
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100 return binaryWriter(new FileOutputStream(file));
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101 }
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102
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103 public LuanFunction read_lines() throws IOException {
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104 return lines(new BufferedReader(new FileReader(file)));
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105 }
116
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106
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107 public LuanFunction read_blocks(Integer blockSize) throws IOException {
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108 int n = blockSize!=null ? blockSize : Utils.bufSize;
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109 return blocks(new FileInputStream(file),n);
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110 }
115
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111 }
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112
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113 public static LuanTable file(String name) {
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114 LuanTable tbl = new LuanTable();
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115 LuanFile file = new LuanFile(name);
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116 try {
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117 tbl.put( "read_text", new LuanJavaFunction(
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118 LuanFile.class.getMethod( "read_text" ), file
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119 ) );
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120 tbl.put( "read_binary", new LuanJavaFunction(
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121 LuanFile.class.getMethod( "read_binary" ), file
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122 ) );
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123 tbl.put( "write", new LuanJavaFunction(
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124 LuanFile.class.getMethod( "write", LuanState.class, Object.class ), file
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125 ) );
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126 tbl.put( "text_writer", new LuanJavaFunction(
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127 LuanFile.class.getMethod( "text_writer" ), file
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128 ) );
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129 tbl.put( "binary_writer", new LuanJavaFunction(
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130 LuanFile.class.getMethod( "binary_writer" ), file
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131 ) );
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132 tbl.put( "read_lines", new LuanJavaFunction(
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133 LuanFile.class.getMethod( "read_lines" ), file
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134 ) );
116
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135 tbl.put( "read_blocks", new LuanJavaFunction(
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136 LuanFile.class.getMethod( "read_blocks", Integer.class ), file
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137 ) );
115
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138 } catch(NoSuchMethodException e) {
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139 throw new RuntimeException(e);
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140 }
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141 return tbl;
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142 }
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143
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144
116
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145 public static final class LuanUrl {
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146 private final URL url;
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147
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148 LuanUrl(String s) throws MalformedURLException {
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149 this.url = new URL(s);
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150 }
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151
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152 public String read_text() throws IOException {
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153 Reader in = new InputStreamReader(url.openStream());
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154 String s = Utils.readAll(in);
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155 in.close();
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156 return s;
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157 }
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158
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159 public byte[] read_binary() throws IOException {
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160 InputStream in = url.openStream();
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161 byte[] a = Utils.readAll(in);
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162 in.close();
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163 return a;
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164 }
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165
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166 public LuanFunction read_lines() throws IOException {
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167 return lines(new BufferedReader(new InputStreamReader(url.openStream())));
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168 }
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169
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170 public LuanFunction read_blocks(Integer blockSize) throws IOException {
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171 int n = blockSize!=null ? blockSize : Utils.bufSize;
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172 return blocks(url.openStream(),n);
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173 }
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174 }
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175
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176 public static LuanTable url(String s) throws MalformedURLException {
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177 LuanTable tbl = new LuanTable();
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178 LuanUrl url = new LuanUrl(s);
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179 try {
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180 tbl.put( "read_text", new LuanJavaFunction(
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181 LuanUrl.class.getMethod( "read_text" ), url
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182 ) );
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183 tbl.put( "read_binary", new LuanJavaFunction(
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184 LuanUrl.class.getMethod( "read_binary" ), url
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185 ) );
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186 tbl.put( "read_lines", new LuanJavaFunction(
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187 LuanUrl.class.getMethod( "read_lines" ), url
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188 ) );
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189 tbl.put( "read_blocks", new LuanJavaFunction(
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190 LuanUrl.class.getMethod( "read_blocks", Integer.class ), url
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191 ) );
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192 } catch(NoSuchMethodException e) {
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193 throw new RuntimeException(e);
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194 }
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195 return tbl;
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196 }
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197
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198
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199
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200 public static String stdin_read_text() throws IOException {
115
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201 return Utils.readAll(new InputStreamReader(System.in));
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202 }
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203
116
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204 public static byte[] stdin_read_binary() throws IOException {
115
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205 return Utils.readAll(System.in);
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206 }
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207
116
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208 public static LuanFunction stdin_read_lines() throws IOException {
115
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209 return lines(new BufferedReader(new InputStreamReader(System.in)));
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210 }
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211
116
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212 public static LuanFunction stdin_read_blocks(Integer blockSize) throws IOException {
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213 int n = blockSize!=null ? blockSize : Utils.bufSize;
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214 return blocks(System.in,n);
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215 }
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216
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217 public static String java_resource_to_url(String path) throws IOException {
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218 URL url = ClassLoader.getSystemResource(path);
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219 return url==null ? null : url.toString();
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220 }
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221
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222 public static LuanTable java_resource(String path) throws IOException {
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223 return url(java_resource_to_url(path));
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224 }
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225
118
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226 public static String read_console_line(String prompt) throws IOException {
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227 if( prompt==null )
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228 prompt = "> ";
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229 return System.console().readLine(prompt);
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230 }
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231
115
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232
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233 public interface LuanWriter {
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234 public void write(LuanState luan,Object... args) throws LuanException, IOException;
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235 public void close() throws IOException;
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236 }
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237
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238 public static LuanTable writer(final PrintStream out) {
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239 LuanWriter luanWriter = new LuanWriter() {
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240
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241 public void write(LuanState luan,Object... args) throws LuanException {
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242 for( Object obj : args ) {
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243 out.print( luan.JAVA.toString(obj) );
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244 }
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245 }
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246
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247 public void close() {
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248 out.close();
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249 }
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250 };
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251 return writer(luanWriter);
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252 }
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253
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254 public static LuanTable writer(final Writer out) {
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255 LuanWriter luanWriter = new LuanWriter() {
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256
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257 public void write(LuanState luan,Object... args) throws LuanException, IOException {
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258 for( Object obj : args ) {
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259 out.write( luan.JAVA.toString(obj) );
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260 }
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261 }
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262
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263 public void close() throws IOException {
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264 out.close();
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265 }
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266 };
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267 return writer(luanWriter);
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268 }
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269
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270 private static LuanTable writer(LuanWriter luanWriter) {
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271 LuanTable writer = new LuanTable();
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272 try {
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273 writer.put( "write", new LuanJavaFunction(
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274 LuanWriter.class.getMethod( "write", LuanState.class, new Object[0].getClass() ), luanWriter
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275 ) );
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276 writer.put( "close", new LuanJavaFunction(
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277 LuanWriter.class.getMethod( "close" ), luanWriter
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278 ) );
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279 } catch(NoSuchMethodException e) {
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280 throw new RuntimeException(e);
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281 }
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282 return writer;
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283 }
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284
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285
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286 public static LuanTable binaryWriter(final OutputStream out) {
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287 LuanTable writer = new LuanTable();
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288 try {
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289 writer.put( "write", new LuanJavaFunction(
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290 OutputStream.class.getMethod( "write", new byte[0].getClass() ), out
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291 ) );
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292 writer.put( "close", new LuanJavaFunction(
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293 OutputStream.class.getMethod( "close" ), out
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294 ) );
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295 } catch(NoSuchMethodException e) {
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296 throw new RuntimeException(e);
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297 }
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298 return writer;
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299 }
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300
116
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301 static LuanFunction lines(final BufferedReader in) {
115
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302 return new LuanFunction() {
116
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303 @Override public Object call(LuanState luan,Object[] args) throws LuanException {
115
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304 try {
116
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305 if( args.length > 0 ) {
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306 if( args.length > 1 || !"close".equals(args[0]) )
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307 throw luan.JAVA.exception( "the only argument allowed is 'close'" );
115
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308 in.close();
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309 return null;
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310 }
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311 String rtn = in.readLine();
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312 if( rtn==null )
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313 in.close();
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314 return rtn;
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315 } catch(IOException e) {
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316 throw luan.JAVA.exception(e);
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317 }
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318 }
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319 };
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320 }
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321
116
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322 static LuanFunction blocks(final InputStream in,final int blockSize) {
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323 return new LuanFunction() {
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324 final byte[] a = new byte[blockSize];
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325
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326 @Override public Object call(LuanState luan,Object[] args) throws LuanException {
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327 try {
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328 if( args.length > 0 ) {
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329 if( args.length > 1 || !"close".equals(args[0]) )
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330 throw luan.JAVA.exception( "the only argument allowed is 'close'" );
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331 in.close();
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332 return null;
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333 }
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334 if( in.read(a) == -1 ) {
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335 in.close();
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336 return null;
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337 }
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338 return a;
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339 } catch(IOException e) {
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340 throw luan.JAVA.exception(e);
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341 }
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342 }
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343 };
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344 }
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345
115
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346 }