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1 /*******************************************************************************
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2 * Copyright (c) 2000, 2007 IBM Corporation and others.
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3 * All rights reserved. This program and the accompanying materials
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4 * are made available under the terms of the Eclipse Public License v1.0
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5 * which accompanies this distribution, and is available at
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6 * http://www.eclipse.org/legal/epl-v10.html
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7 *
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8 * Contributors:
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9 * IBM Corporation - initial API and implementation
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10 *******************************************************************************/
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11 module org.eclipse.swt.internal.Library;
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12
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13 import tango.util.Convert;
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14
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15 public class Library {
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16
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17 /* SWT Version - Mmmm (M=major, mmm=minor) */
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18
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19 /**
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20 * SWT Major version number (must be >= 0)
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21 */
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22 static const int MAJOR_VERSION = 3;
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23
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24 /**
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25 * SWT Minor version number (must be in the range 0..999)
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26 */
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27 static const int MINOR_VERSION = 346;
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28
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29 /**
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30 * SWT revision number (must be >= 0)
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31 */
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32 static const int REVISION = 0;
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33
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34 /**
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35 * The JAVA and SWT versions
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36 */
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37 //public static const int JAVA_VERSION;
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38 public static const int SWT_VERSION;
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39
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40 version( linux ){
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41 static const char[] SEPARATOR = "\n";
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42 }
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43 else {
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44 static assert( false, "only linux supported for this port" );
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45 }
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46
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47
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48 static this(){
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49 //SEPARATOR = System.getProperty("file.separator");
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50 //JAVA_VERSION = parseVersion(System.getProperty("java.version"));
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51 SWT_VERSION = buildSWT_VERSION(MAJOR_VERSION, MINOR_VERSION);
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52 }
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53
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54 static int parseVersion(char[] aVersion) {
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55 if (aVersion == null) return 0;
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56 int major = 0, minor = 0, micro = 0;
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57 int length = aVersion.length, index = 0, start = 0;
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58 bool isDigit( char c ){
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59 return c >= '0' && c <= '9';
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60 }
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61 while (index < length && isDigit(aVersion[index])) index++;
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62 try {
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63 if (start < length) major = to!(int)( aVersion[start .. index] );
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64 } catch (ConversionException e) {}
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65 start = ++index;
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66 while (index < length && isDigit(aVersion[index])) index++;
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67 try {
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68 if (start < length) minor = to!(int)(aVersion[start .. index]);
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69 } catch (ConversionException e) {}
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70 start = ++index;
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71 while (index < length && isDigit(aVersion[index])) index++;
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72 try {
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73 if (start < length) micro = to!(int)(aVersion[start .. index]);
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74 } catch (ConversionException e) {}
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75 return buildJAVA_VERSION(major, minor, micro);
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76 }
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77
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78 /**
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79 * Returns the Java version number as an integer.
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80 *
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81 * @param major
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82 * @param minor
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83 * @param micro
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84 * @return the version
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85 */
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86 public static int buildJAVA_VERSION (int major, int minor, int micro) {
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87 return (major << 16) + (minor << 8) + micro;
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88 }
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89
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90 /**
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91 * Returns the SWT version number as an integer.
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92 *
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93 * @param major
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94 * @param minor
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95 * @return the version
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96 */
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97 public static int buildSWT_VERSION (int major, int minor) {
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98 return major * 1000 + minor;
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99 }
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100 /+ PORTING_LEFT
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101 static bool extract (char[] fileName, char[] mappedName) {
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102 FileOutputStream os = null;
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103 InputStream is = null;
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104 File file = new File(fileName);
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105 try {
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106 if (!file.exists ()) {
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107 is = Library.class.getResourceAsStream ("/" + mappedName); //$NON-NLS-1$
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108 if (is != null) {
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109 int read;
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110 byte [] buffer = new byte [4096];
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111 os = new FileOutputStream (fileName);
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112 while ((read = is.read (buffer)) != -1) {
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113 os.write(buffer, 0, read);
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114 }
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115 os.close ();
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116 is.close ();
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117 if (!Platform.PLATFORM.equals ("win32")) { //$NON-NLS-1$
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118 try {
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119 Runtime.getRuntime ().exec (new String []{"chmod", "755", fileName}).waitFor(); //$NON-NLS-1$ //$NON-NLS-2$
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120 } catch (Throwable e) {}
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121 }
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122 if (load (fileName)) return true;
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123 }
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124 }
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125 } catch (Throwable e) {
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126 try {
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127 if (os != null) os.close ();
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128 } catch (IOException e1) {}
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129 try {
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130 if (is != null) is.close ();
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131 } catch (IOException e1) {}
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132 }
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133 if (file.exists ()) file.delete ();
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134 return false;
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135 }
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136
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137 static bool load (char[] libName) {
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138 try {
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139 if (libName.indexOf (SEPARATOR) != -1) {
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140 System.load (libName);
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141 } else {
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142 System.loadLibrary (libName);
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143 }
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144 return true;
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145 } catch (UnsatisfiedLinkError e) {}
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146 return false;
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147 }
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148
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149 /**
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150 * Loads the shared library that matches the version of the
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151 * Java code which is currently running. SWT shared libraries
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152 * follow an encoding scheme where the major, minor and revision
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153 * numbers are embedded in the library name and this along with
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154 * <code>name</code> is used to load the library. If this fails,
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155 * <code>name</code> is used in another attempt to load the library,
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156 * this time ignoring the SWT version encoding scheme.
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157 *
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158 * @param name the name of the library to load
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159 */
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160 public static void loadLibrary (char[] name) {
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161 loadLibrary (name, true);
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162 }
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163
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164 /**
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165 * Loads the shared library that matches the version of the
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166 * Java code which is currently running. SWT shared libraries
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167 * follow an encoding scheme where the major, minor and revision
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168 * numbers are embedded in the library name and this along with
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169 * <code>name</code> is used to load the library. If this fails,
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170 * <code>name</code> is used in another attempt to load the library,
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171 * this time ignoring the SWT version encoding scheme.
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172 *
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173 * @param name the name of the library to load
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174 * @param mapName true if the name should be mapped, false otherwise
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175 */
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176 public static void loadLibrary (char[] name, boolean mapName) {
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177
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178 /* Compute the library name and mapped name */
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179 String libName1, libName2, mappedName1, mappedName2;
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180 if (mapName) {
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181 String version = System.getProperty ("swt.version"); //$NON-NLS-1$
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182 if (version == null) {
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183 version = "" + MAJOR_VERSION; //$NON-NLS-1$
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184 /* Force 3 digits in minor version number */
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185 if (MINOR_VERSION < 10) {
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186 version += "00"; //$NON-NLS-1$
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187 } else {
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188 if (MINOR_VERSION < 100) version += "0"; //$NON-NLS-1$
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189 }
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190 version += MINOR_VERSION;
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191 /* No "r" until first revision */
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192 if (REVISION > 0) version += "r" + REVISION; //$NON-NLS-1$
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193 }
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194 libName1 = name + "-" + Platform.PLATFORM + "-" + version; //$NON-NLS-1$ //$NON-NLS-2$
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195 libName2 = name + "-" + Platform.PLATFORM; //$NON-NLS-1$
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196 mappedName1 = System.mapLibraryName (libName1);
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197 mappedName2 = System.mapLibraryName (libName2);
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198 } else {
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199 libName1 = libName2 = mappedName1 = mappedName2 = name;
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200 }
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201
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202 /* Try loading library from swt library path */
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203 String path = System.getProperty ("swt.library.path"); //$NON-NLS-1$
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204 if (path != null) {
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205 path = new File (path).getAbsolutePath ();
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206 if (load (path + SEPARATOR + mappedName1)) return;
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207 if (mapName && load (path + SEPARATOR + mappedName2)) return;
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208 }
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209
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210 /* Try loading library from java library path */
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211 if (load (libName1)) return;
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212 if (mapName && load (libName2)) return;
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213
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214 /* Try loading library from the tmp directory if swt library path is not specified */
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215 if (path == null) {
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216 path = System.getProperty ("java.io.tmpdir"); //$NON-NLS-1$
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217 path = new File (path).getAbsolutePath ();
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218 if (load (path + SEPARATOR + mappedName1)) return;
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219 if (mapName && load (path + SEPARATOR + mappedName2)) return;
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220 }
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221
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222 /* Try extracting and loading library from jar */
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223 if (path != null) {
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224 if (extract (path + SEPARATOR + mappedName1, mappedName1)) return;
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225 if (mapName && extract (path + SEPARATOR + mappedName2, mappedName2)) return;
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226 }
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227
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228 /* Failed to find the library */
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229 throw new UnsatisfiedLinkError ("no " + libName1 + " or " + libName2 + " in swt.library.path, java.library.path or the jar file"); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
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230 }
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231 +/
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232 }
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