1 | /* |
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2 | Copyright (c) 2001, bDistributed.com, Inc. |
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3 | All rights reserved. |
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4 | |
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5 | Redistribution and use in source and binary forms, with or |
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6 | without modification, are permitted provided that the following |
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7 | conditions are met: |
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8 | |
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9 | * Redistributions of source code must retain the above |
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10 | copyright notice, this list of conditions and the following |
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11 | disclaimer. |
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12 | |
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13 | * Redistributions in binary form must reproduce the above |
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14 | copyright notice, this list of conditions and the following |
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15 | disclaimer in the documentation and/or other materials |
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16 | provided with the distribution. |
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17 | |
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18 | * Neither the name of bDistributed.com, Inc. nor the names of |
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19 | its contributors may be used to endorse or promote products |
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20 | derived from this software without specific prior written |
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21 | permission. |
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22 | |
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23 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND |
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24 | CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, |
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25 | INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
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26 | MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
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27 | DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE |
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28 | LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, |
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29 | OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
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30 | PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, |
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31 | OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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32 | THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR |
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33 | TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
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34 | OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY |
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35 | OF SUCH DAMAGE. |
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36 | */ |
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37 | |
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38 | #include <assert.h> |
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39 | |
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40 | #import "BDAlias.h" |
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41 | |
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42 | |
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43 | static Handle DataToHandle(CFDataRef inData); |
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44 | static CFDataRef HandleToData(Handle inHandle); |
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45 | |
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46 | static OSStatus PathToFSRef(CFStringRef inPath, FSRef *outRef); |
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47 | static CFStringRef FSRefToPathCopy(const FSRef *inRef); |
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48 | |
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49 | |
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50 | static Handle DataToHandle(CFDataRef inData) |
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51 | { |
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52 | CFIndex len; |
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53 | Handle handle = NULL; |
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54 | |
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55 | if (inData == NULL) { |
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56 | return NULL; |
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57 | } |
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58 | |
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59 | len = CFDataGetLength(inData); |
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60 | |
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61 | handle = NewHandle(len); |
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62 | |
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63 | if ((handle != NULL) && (len > 0)) { |
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64 | HLock(handle); |
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65 | BlockMoveData(CFDataGetBytePtr(inData), *handle, len); |
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66 | HUnlock(handle); |
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67 | } |
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68 | |
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69 | return handle; |
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70 | } |
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71 | |
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72 | static CFDataRef HandleToData(Handle inHandle) |
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73 | { |
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74 | CFDataRef data = NULL; |
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75 | CFIndex len; |
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76 | SInt8 handleState; |
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77 | |
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78 | if (inHandle == NULL) { |
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79 | return NULL; |
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80 | } |
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81 | |
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82 | len = GetHandleSize(inHandle); |
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83 | |
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84 | handleState = HGetState(inHandle); |
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85 | |
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86 | HLock(inHandle); |
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87 | |
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88 | data = CFDataCreate(kCFAllocatorDefault, (const UInt8 *) *inHandle, len); |
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89 | |
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90 | HSetState(inHandle, handleState); |
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91 | |
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92 | return data; |
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93 | } |
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94 | |
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95 | static OSStatus PathToFSRef(CFStringRef inPath, FSRef *outRef) |
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96 | { |
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97 | CFURLRef tempURL = NULL; |
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98 | Boolean gotRef = false; |
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99 | |
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100 | tempURL = CFURLCreateWithFileSystemPath(kCFAllocatorDefault, inPath, |
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101 | kCFURLPOSIXPathStyle, false); |
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102 | |
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103 | if (tempURL == NULL) { |
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104 | return fnfErr; |
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105 | } |
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106 | |
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107 | gotRef = CFURLGetFSRef(tempURL, outRef); |
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108 | |
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109 | if (gotRef == false) { |
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110 | return fnfErr; |
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111 | } |
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112 | |
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113 | return noErr; |
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114 | } |
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115 | |
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116 | static CFStringRef FSRefToPathCopy(const FSRef *inRef) |
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117 | { |
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118 | CFURLRef tempURL = NULL; |
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119 | CFStringRef result = NULL; |
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120 | |
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121 | if (inRef != NULL) { |
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122 | tempURL = CFURLCreateFromFSRef(kCFAllocatorDefault, inRef); |
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123 | |
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124 | if (tempURL == NULL) { |
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125 | return NULL; |
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126 | } |
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127 | |
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128 | result = CFURLCopyFileSystemPath(tempURL, kCFURLPOSIXPathStyle); |
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129 | |
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130 | CFRelease(tempURL); |
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131 | } |
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132 | |
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133 | return result; |
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134 | } |
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135 | |
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136 | |
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137 | @implementation BDAlias |
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138 | |
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139 | - (id)initWithAliasHandle:(AliasHandle)alias |
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140 | { |
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141 | id ret = [super init]; |
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142 | |
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143 | if (ret != nil) { |
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144 | _alias = alias; |
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145 | } |
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146 | |
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147 | return ret; |
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148 | } |
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149 | |
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150 | - (id)initWithData:(NSData *)data |
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151 | { |
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152 | return [self initWithAliasHandle:(AliasHandle)DataToHandle((CFDataRef) data)]; |
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153 | } |
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154 | |
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155 | - (id)initWithPath:(NSString *)fullPath |
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156 | { |
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157 | OSStatus anErr = noErr; |
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158 | FSRef ref; |
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159 | |
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160 | anErr = PathToFSRef((CFStringRef) fullPath, &ref); |
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161 | |
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162 | if (anErr != noErr) { |
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163 | return nil; |
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164 | } |
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165 | |
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166 | return [self initWithFSRef:&ref];; |
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167 | } |
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168 | |
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169 | - (id)initWithPath:(NSString *)path relativeToPath:(NSString *)relPath |
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170 | { |
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171 | OSStatus anErr = noErr; |
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172 | FSRef ref, relRef; |
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173 | |
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174 | anErr = PathToFSRef((CFStringRef) [relPath stringByAppendingPathComponent:path], |
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175 | &ref); |
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176 | |
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177 | if (anErr != noErr) { |
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178 | return nil; |
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179 | } |
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180 | |
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181 | anErr = PathToFSRef((CFStringRef) relPath, &relRef); |
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182 | |
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183 | if (anErr != noErr) { |
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184 | return nil; |
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185 | } |
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186 | |
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187 | return [self initWithFSRef:&ref relativeToFSRef:&relRef]; |
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188 | } |
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189 | |
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190 | - (id)initWithFSRef:(FSRef *)ref |
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191 | { |
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192 | return [self initWithFSRef:ref relativeToFSRef:NULL]; |
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193 | } |
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194 | |
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195 | - (id)initWithFSRef:(FSRef *)ref relativeToFSRef:(FSRef *)relRef |
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196 | { |
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197 | OSStatus anErr = noErr; |
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198 | AliasHandle alias = NULL; |
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199 | |
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200 | anErr = FSNewAlias(relRef, ref, &alias); |
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201 | |
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202 | if (anErr != noErr) { |
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203 | return nil; |
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204 | } |
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205 | |
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206 | return [self initWithAliasHandle:alias]; |
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207 | } |
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208 | |
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209 | - (void)dealloc |
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210 | { |
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211 | if (_alias != NULL) { |
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212 | DisposeHandle((Handle) _alias); |
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213 | _alias = NULL; |
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214 | } |
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215 | |
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216 | [super dealloc]; |
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217 | } |
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218 | |
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219 | - (AliasHandle)alias |
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220 | { |
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221 | return _alias; |
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222 | } |
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223 | |
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224 | - (void)setAlias:(AliasHandle)newAlias |
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225 | { |
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226 | if (_alias != NULL) { |
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227 | DisposeHandle((Handle) _alias); |
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228 | } |
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229 | |
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230 | _alias = newAlias; |
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231 | } |
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232 | |
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233 | - (NSData *)aliasData |
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234 | { |
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235 | NSData *result; |
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236 | |
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237 | result = (NSData *)HandleToData((Handle) _alias); |
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238 | |
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239 | return [result autorelease]; |
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240 | } |
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241 | |
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242 | - (void)setAliasData:(NSData *)newAliasData |
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243 | { |
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244 | [self setAlias:(AliasHandle) DataToHandle((CFDataRef) newAliasData)]; |
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245 | } |
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246 | |
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247 | - (NSString *)displayNameWithKindString:(NSString **)outKindString; |
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248 | { |
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249 | AliasHandle alias = [self alias]; |
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250 | FSRef ref; |
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251 | Boolean wasChanged; |
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252 | CFStringRef name; |
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253 | |
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254 | if (alias == NULL) return nil; |
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255 | if (FSResolveAlias(NULL, alias, &ref, &wasChanged) != noErr) return nil; |
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256 | |
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257 | if (LSCopyDisplayNameForRef(&ref, &name) != noErr) return nil; |
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258 | [(NSString *)name autorelease]; |
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259 | |
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260 | if (outKindString != NULL) { |
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261 | if (LSCopyKindStringForRef(&ref, (CFStringRef *)outKindString) != noErr) return nil; |
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262 | [*outKindString autorelease]; |
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263 | } |
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264 | |
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265 | return (NSString *)name; |
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266 | } |
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267 | |
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268 | - (NSString *)fullPath |
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269 | { |
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270 | return [self fullPathRelativeToPath:nil]; |
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271 | } |
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272 | |
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273 | - (NSString *)fullPathRelativeToPath:(NSString *)relPath |
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274 | { |
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275 | OSStatus anErr = noErr; |
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276 | FSRef relPathRef; |
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277 | FSRef tempRef; |
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278 | NSString *result = nil; |
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279 | Boolean wasChanged; |
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280 | |
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281 | if (_alias != NULL) { |
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282 | if (relPath != nil) { |
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283 | anErr = PathToFSRef((CFStringRef)relPath, &relPathRef); |
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284 | |
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285 | if (anErr != noErr) { |
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286 | return NULL; |
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287 | } |
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288 | |
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289 | anErr = FSResolveAlias(&relPathRef, _alias, &tempRef, &wasChanged); |
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290 | } else { |
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291 | anErr = FSResolveAlias(NULL, _alias, &tempRef, &wasChanged); |
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292 | } |
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293 | |
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294 | if (anErr != noErr) { |
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295 | return NULL; |
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296 | } |
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297 | |
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298 | result = (NSString *)FSRefToPathCopy(&tempRef); |
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299 | } |
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300 | |
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301 | return [result autorelease]; |
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302 | } |
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303 | |
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304 | - (BOOL)aliasIsEqual:(AliasHandle)otherAlias; |
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305 | { |
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306 | AliasHandle alias = [self alias]; |
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307 | FSRef ref, otherRef; |
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308 | Boolean wasChanged; |
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309 | |
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310 | if (alias == otherAlias) return YES; |
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311 | if (alias == NULL || otherAlias == NULL) return NO; |
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312 | if (FSResolveAlias(NULL, alias, &ref, &wasChanged) != noErr) return NO; |
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313 | if (FSResolveAlias(NULL, otherAlias, &otherRef, &wasChanged) != noErr) return NO; |
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314 | return (FSCompareFSRefs(&ref, &otherRef) == noErr); |
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315 | } |
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316 | |
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317 | - (BOOL)aliasDataIsEqual:(NSData *)data; |
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318 | { |
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319 | AliasHandle otherAlias; |
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320 | const UInt8 *aliasPtr = CFDataGetBytePtr((CFDataRef)data); |
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321 | BOOL result; |
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322 | if (aliasPtr == NULL) { |
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323 | otherAlias = (AliasHandle)DataToHandle((CFDataRef)data); |
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324 | } else { |
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325 | otherAlias = (AliasHandle)&aliasPtr; |
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326 | } |
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327 | result = [self aliasIsEqual: otherAlias]; |
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328 | if (aliasPtr == NULL) DisposeHandle((Handle)otherAlias); |
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329 | return result; |
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330 | } |
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331 | |
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332 | - (BOOL)isEqual:(id)object; |
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333 | { |
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334 | if (![object isKindOfClass: [BDAlias class]]) return NO; |
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335 | return [self aliasIsEqual: [object alias]]; |
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336 | } |
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337 | |
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338 | + (BDAlias *)aliasWithAliasHandle:(AliasHandle)alias |
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339 | { |
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340 | return [[[BDAlias alloc] initWithAliasHandle:alias] autorelease]; |
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341 | } |
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342 | |
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343 | + (BDAlias *)aliasWithData:(NSData *)data |
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344 | { |
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345 | return [[[BDAlias alloc] initWithData:data] autorelease]; |
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346 | } |
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347 | |
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348 | + (BDAlias *)aliasWithPath:(NSString *)fullPath |
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349 | { |
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350 | return [[[BDAlias alloc] initWithPath:fullPath] autorelease]; |
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351 | } |
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352 | |
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353 | + (BDAlias *)aliasWithPath:(NSString *)path relativeToPath:(NSString *)relPath |
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354 | { |
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355 | return [[[BDAlias alloc] initWithPath:path relativeToPath:relPath] autorelease]; |
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356 | } |
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357 | |
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358 | + (BDAlias *)aliasWithFSRef:(FSRef *)ref |
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359 | { |
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360 | return [[[BDAlias alloc] initWithFSRef:ref] autorelease]; |
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361 | } |
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362 | |
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363 | + (BDAlias *)aliasWithFSRef:(FSRef *)ref relativeToFSRef:(FSRef *)relRef |
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364 | { |
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365 | return [[[BDAlias alloc] initWithFSRef:ref relativeToFSRef:relRef] autorelease]; |
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366 | } |
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367 | |
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368 | @end |
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