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6725 | siemargl | 1 | A free Macintosh Port of Info-ZIP's |
2 | Zip and UnZip |
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3 | By Dirk Haase, d_haase@sitec.net |
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4 | Home page: www.sitec.net/maczip |
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5 | Mirror page: |
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6 | www.haase-online.de/dirk/maczip |
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7 | ================================ |
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8 | |||
9 | |||
10 | |||
11 | Abstract: |
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12 | --------- |
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13 | MacZip is a cross-platform compatible tool that includes |
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14 | both Zip (for compression) and UnZip (for extraction). |
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15 | |||
16 | Zip is a compression and file packaging utility for Unix, |
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17 | VMS, MSDOS, OS/2, Windows 9x, Windows NT, Atari, Macintosh, |
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18 | Amiga, Acorn RISC OS, and other systems. |
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19 | |||
20 | UnZip unpacks zip archives. The Zip and UnZip programs can |
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21 | process archives produced by PKZIP, and PKZIP and PKUNZIP |
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22 | can work with archives produced by zip. Zip version 2.2 is |
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23 | compatible with PKZIP 2.04. |
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24 | |||
25 | If you are new to MacZip please read first the file |
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26 | "ReadMe.1st". |
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27 | |||
28 | |||
29 | |||
30 | License: |
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31 | -------- |
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32 | Copyright (c) 1990-2001 Info-ZIP. All rights reserved. |
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33 | |||
34 | See the accompanying file LICENSE, version 2000-Apr-09 or later |
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35 | (the contents of which are also included in unzip.h) for terms of use. |
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36 | If, for some reason, all these files are missing, the Info-ZIP license |
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37 | also may be found at: ftp://ftp.info-zip.org/pub/infozip/license.html |
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38 | |||
39 | |||
40 | |||
41 | Requirements |
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42 | ------------ |
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43 | MacZip requires at least System 7 and a Macintosh with a |
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44 | minimum of a Motorola 68020 or PowerPC 601 processor. Other |
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45 | configurations may work but it is not tested at all. |
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46 | |||
47 | The application is distributed as a fat binary with both |
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48 | regular 68K and native PowerPC versions included. |
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49 | |||
50 | |||
51 | |||
52 | Installation |
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53 | ------------ |
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54 | Move the executable(s) somewhere--for example, drag it (or |
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55 | them) to your Applications folder. For easy access, make an |
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56 | alias in the Launcher Control Panel or directly on your |
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57 | desktop. The GUI is very simple. It was not my intention to |
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58 | make a full-blown GUI, however I think it is comfortable |
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59 | enough to use it as regular tool. |
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60 | |||
61 | This port supports also Apple-event. So you can install it |
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62 | in your WWW-Browser as a helper app. |
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63 | |||
64 | For more Info about the contents of this package, take a |
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65 | look into the "macos/Contents" (or :macos:Contents) file. |
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66 | Some notes on how to rebuild the Macintosh applications can |
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67 | be found in INSTALL. |
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68 | |||
69 | |||
70 | |||
71 | Usage: |
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72 | ------ |
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73 | |||
74 | Basically there are four ways to start MacZip: |
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75 | |||
76 | a) Drag'n Drop |
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77 | b) using the Dialog box (Menu: File -> Zip/Unzip): |
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78 | |||
79 | Please read the file "ReadMe.1st" |
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80 | for the description of the items a and b. |
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81 | |||
82 | c) Using the Command line (Menu: File->Command Line): |
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83 | The Zip & UnZip tools are command line tools. So the |
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84 | behavior is exactly the same like the Zip & UnZip tools on |
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85 | Unix or Windows/DOS. This means, if you want to zip some |
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86 | files, you have to write a command line like this: "zip |
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87 | [switches] path_to_zip_archive path_to_files_folders" |
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88 | |||
89 | - Go to "File", select "Command Line" and the |
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90 | "MacZip Entry box" Dialog Box appears. |
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91 | |||
92 | An example: |
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93 | |||
94 | a: your zip may be created at |
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95 | Macintosh HD:applications:archive.zip |
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96 | |||
97 | b: your files may be found at |
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98 | Macintosh HD:somewhere:my_folder_to_archive:* |
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99 | |||
100 | Note: At the end of the path there must be a filename or |
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101 | a wildcard ! |
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102 | (see Footnotes: 1 wildcard, 2 Mac path names) |
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103 | |||
104 | So the command line should look like (one line!): |
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105 | |||
106 | zip "Macintosh HD:applications:archive.zip" "Macintosh HD:somewhere:my_folder_to_archive:*" |
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107 | |||
108 | - Click on "Enter" to start the task. |
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109 | |||
110 | Since you can not set a default folder you have to enter |
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111 | always a full qualified path names. Full-qualified path |
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112 | names are path names including the Volume name ! (see |
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113 | Footnote: 2 Mac path names) |
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114 | |||
115 | |||
116 | |||
117 | d) Using Applescript: |
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118 | |||
119 | There is only one additional event defined: "do_cmd". You |
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120 | can enter every valid command line. The first word must be |
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121 | "zip" or "unzip" to select the action (compress or |
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122 | extraction). |
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123 | |||
124 | See sample Applescript: |
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125 | |||
126 | tell application "MacZip (PPC)" |
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127 | activate |
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128 | with timeout of 90000 seconds |
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129 | do_cmd "zip -rjjN Volume:archive \"My Volume:*\" " |
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130 | end timeout |
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131 | end tell |
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132 | |||
133 | This script opens MacZip, brings it to the foreground on the |
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134 | Mac, starts the zip action with the command line: zip -rjjN |
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135 | Volume:archive "My Volume:*" . |
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136 | |||
137 | |||
138 | A short introduction is also available online: |
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139 | http://www.sitec.net/maczip/How-To-Do/ |
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140 | |||
141 | It's possible to stop the run of Zip/Unzip with the well |
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142 | known shortcut [Command] + [.]. |
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143 | |||
144 | |||
145 | --------------------------------------------------------------------------- |
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146 | |||
147 | There are some Mac-specific switches available. |
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148 | Zip Module: |
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149 | -df [MacOS] Include only data-fork of files zipped into |
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150 | the archive. Good for exporting files to foreign |
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151 | operating-systems. Resource-forks will be ignored |
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152 | at all. |
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153 | |||
154 | -jj [MacOS] record Fullpath (+ Volname). The complete |
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155 | path including volume will be stored. By default |
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156 | the relative path will be stored. |
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157 | |||
158 | -S [MSDOS, OS/2, WIN32 and ATARI] Include system and |
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159 | hidden files. |
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160 | [MacOS] Includes finder invisible files, which are |
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161 | ignored otherwise. |
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162 | |||
163 | Unzip Module: |
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164 | -E [MacOS only] display contents of MacOS extra field |
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165 | during restore operation. |
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166 | |||
167 | -i [MacOS only] ignore filenames stored in MacOS extra |
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168 | fields. Instead, the most compatible filename |
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169 | stored in the generic part of the entry's header is |
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170 | used. |
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171 | |||
172 | -J [MacOS only] ignore MacOS extra fields. All Macin- |
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173 | tosh specific info is skipped. Data-fork and |
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174 | resource-fork are restored as separate files. |
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175 | |||
176 | |||
177 | Select [File]->[Get Help on Zip/Unzip] for a complete list |
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178 | of switches. |
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179 | |||
180 | |||
181 | |||
182 | Limitations / Problems: |
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183 | ----------------------- |
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184 | |||
185 | - Aliases are not supported. I tried, but I got broken |
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186 | aliases. This port will silently ignore all aliases. |
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187 | It's on my to-do list for future releases. |
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188 | |||
189 | - Zip needs much memory to compress many files: You may need |
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190 | to increase the 'Preferred Size' in 'Get Info'. Values of 12 |
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191 | Megabytes or more are possible |
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192 | |||
193 | - Unzip needs about 500 Kbytes of memory to unzip no matter |
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194 | how many files were compressed and expanded. |
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195 | |||
196 | - and finally one big macintosh-related problem: |
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197 | This port has one weak point: It's based on path names. |
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198 | As you may be already know: Path names are not unique on a Mac ! |
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199 | The main reason is that an attempt to implement support exact |
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200 | saving of the MacOS specific internal file structures would |
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201 | require a throughout rewrite of major parts of shared code, |
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202 | probably sacrifying compatibility with other systems. I have |
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203 | no solution at the moment. The port will just warn you if you |
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204 | try zip from / to a volume which has a duplicate name. |
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205 | MacZip has problems to find the archive or the files. My |
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206 | (Big) recommendation: Name all your volumes with a unique |
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207 | name and MacZip will run without any problem. |
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208 | |||
209 | |||
210 | Known Bugs: |
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211 | |||
212 | - crypted files in a zip archive are sometimes corrupt: |
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213 | I get an error message: invalid compressed data to inflate. |
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214 | Appearance of this error is purely be chance: I did a small |
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215 | test: Unzipping an archive containing 3589 files 56 files |
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216 | fails to unzip, so about 1.5%. Root cause is completely |
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217 | unclear to me :( |
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218 | |||
219 | I strongly recommend to test your archive (e.g. unzip -t archive). |
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220 | |||
221 | |||
222 | |||
223 | |||
224 | |||
225 | Zip Programs / Macintosh Extra-Data: |
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226 | ----------------------------------------- |
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227 | A brief overview: |
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228 | Currently, as far as I know, there are 6 Zip programs |
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229 | available for the Macintosh platform. These programs build |
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230 | (of course) different variants of Zip files: |
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231 | |||
232 | - Info-ZIP's first Port of Zip. Ported by Johnny Lee |
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233 | This port is rather outdated and no longer supported (since 1992). |
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234 | 68K only. Only minimal Mac-info is stored |
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235 | (Creator/Type, Finder attributes). Creator/Type: '????' / '????' |
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236 | Until year 1998, only UnZip 5.32 survived. |
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237 | |||
238 | - ZipIt by Tom Brown. This is Shareware and still supported I think. |
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239 | ZipIt has a nice GUI, but I found it can't handle large Zip files |
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240 | quite well. ZipIt compresses Macintosh files using the Mac Binary |
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241 | format. So, transferring files to other platforms is not so easy. |
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242 | Only minimal Mac-info is stored (Creator/Type, Finder attributes). |
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243 | Mac filenames are changed to a most compatible filename. |
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244 | Creator/Type: 'ZIP ' / 'ZIP ' |
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245 | |||
246 | - PKZIP/mac v2.03/210d. This is Shareware. |
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247 | This Zip implementation for the Mac can be found on ASI's web site |
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248 | (http://www.asizip.com/products/products.htm). The name of this |
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249 | program is misleading, it is NOT a product from PKWARE. ASI's last |
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250 | release version is v2.03, and they also offer a newer beta version |
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251 | PKZIP/mac 210d. But even the Beta version is rather outdated (1995). |
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252 | Only minimal Mac-info is stored (Creator/Type, Finder attributes). |
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253 | The Zipfile format looks like incompatible to other platforms. |
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254 | (More details about the compatibility issue can be found in |
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255 | proginfo/3rdparty.bug!). Type: 'PKz1' |
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256 | Mac filenames are restored without any change. |
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257 | |||
258 | - Aladdin DropZip 1999, This is Shareware. Aladdin chose |
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259 | the format of ZipIt. Therefore, it has the some drawbacks |
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260 | like ZipIt. |
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261 | Creator/Type: 'SITx' / 'ZIP ' |
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262 | |||
263 | - SmartZip 1.0 1999 - by Marco Bambini Vampire Software. |
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264 | This is Shareware. SmartZip compresses Macintosh files using the |
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265 | Mac Binary. Therefore, it has the same drawbacks like ZipIt. |
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266 | Creator/Type: 'dZIP' / 'ZIP ' |
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267 | |||
268 | and finally: |
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269 | - Info-ZIP's latest Port of Zip. MacZip 1.0. Ported by me :-) |
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270 | It is supported (of course) and up to date. Full set of macintosh |
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271 | info is stored: Creator/Type, Finder attributes, Finder comments, |
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272 | MacOS 8.0 Folder settings, Icon/Folder Positions ... |
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273 | Mac filenames are restored without any change. |
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274 | Creator/Type: 'IZip' / 'ZIP ' |
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275 | |||
276 | |||
277 | Compatibility of my port; Extraction: |
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278 | - Archives from Info-ZIP's first port (by Johnny Lee) are |
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279 | still compatible. |
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280 | - Extraction of ZipIt archives is supported. This support |
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281 | is not complete: Filenames are correct but Directory names |
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282 | are sometimes mangled to a DOS compatible form. Segmented |
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283 | archives are not supported. |
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284 | - PKZiP/mac archive files are extracted without resource-forks |
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285 | and without any Finder info. I have no information about |
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286 | that zip format. |
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287 | |||
288 | Compatibility of my port; Compression: |
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289 | - My port supports only the new Info-ZIP format (introduced |
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290 | with this port). Therefore archives created by MacZip 1.0 |
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291 | (March 1999) must be extracted with this version or later |
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292 | releases of Info-ZIP's UnZip to restore the complete set of |
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293 | Macintosh attributes. |
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294 | |||
295 | Note: This port is complete unrelated to the shareware ZipIt. |
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296 | Even more, handling of special Macintosh attributes is |
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297 | incompatible with ZipIt. This port (MacZip) may be used to |
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298 | extract archives created by ZipIt, but make sure that you |
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299 | get the result as you expected. |
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300 | |||
301 | |||
302 | |||
303 | Macintosh Files; File Forks: |
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304 | ---------------------------- |
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305 | |||
306 | All Macintosh files comprise two forks, known as the data |
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307 | fork and the resource fork. Unlike the bytes stored in the |
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308 | resource fork, the bytes in the data fork do not have to |
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309 | exhibit any particular internal structure. The application |
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310 | is responsible for interpreting the bytes in the data fork |
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311 | in whatever manner is appropriate. The bytes in the resource |
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312 | fork usually have a defined internal structure and contain |
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313 | data object like menus, dialog boxes, icons and pictures. |
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314 | Although all Macintosh files contain both a data fork and a |
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315 | resource fork, one or both of these forks may be empty. |
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316 | |||
317 | MacZip stores data-forks and resource-forks separately. The |
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318 | Zipfile format does not allow to store two archive entries |
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319 | using exactly the same name. My solution is to modify the |
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320 | Path name of the resource-fork. All resource-fork names are |
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321 | prepended with a leading special directory named |
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322 | "XtraStuf.mac". So, when extracting on a Mac, you should |
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323 | never see this directory "XtraStuf.mac" on your *disk*. |
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324 | |||
325 | On all foreign systems that support directories in filenames |
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326 | (e.g.: OS/2, Unix, DOS/Windows, VMS) you will get a |
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327 | directory "XtraStuf.mac" when extracting MacZip archives. |
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328 | You can delete the complete directory "XtraStuf.mac" since |
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329 | Mac resources do not make much sense outside the MacOS |
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330 | world. |
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331 | |||
332 | |||
333 | |||
334 | Text encoding; Charsets of the Filenames: |
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335 | ----------------------------------------- |
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336 | |||
337 | The following information is only important if you plan to |
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338 | transfer archives across different platforms/language systems: |
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339 | |||
340 | A typical Zip archive does not support different charsets. |
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341 | All filenames stored in the public area (= accessible by |
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342 | foreign systems other than MacOS) must be coded in the |
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343 | charset ISO-8859-1 (CP1252 in the Microsoft Windows world) |
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344 | or CP850 (DOSLatin1). The latter should only be used by Zip |
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345 | programs that mark the archive entries as "created under |
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346 | DOS". Apart from Macs, the commonly used platforms either |
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347 | support ISO-8859-1 directly, or are compatible with it. To |
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348 | achieve maximum compatibility, MacZip convert filenames from |
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349 | the Mac OS Roman character set to ISO-8859-1 and vice versa. |
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350 | But not every char of the charset MacRoman has their |
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351 | equivalent in ISO-8859-1. To make the mapping in most cases |
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352 | possible, I chose most similar chars or at least the MIDDLE |
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353 | DOT. |
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354 | |||
355 | Mac OS Roman character set is used for at least the |
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356 | following Mac OS localizations: U.S., British, Canadian |
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357 | French, French, Swiss French, German, Swiss German, Italian, |
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358 | Swiss Italian, Dutch, Swedish, Norwegian, Danish, Finnish, |
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359 | Spanish, Catalan, Portuguese, Brazilian, and the default |
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360 | International system. |
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361 | |||
362 | In all Mac OS encodings, character codes 0x00-0x7F are |
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363 | identical to ASCII, except that |
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364 | - in Mac OS Japanese, yen sign replaces reverse solidus |
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365 | - in Mac OS Arabic, Farsi, and Hebrew, some of the |
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366 | punctuation in this range is treated as having strong |
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367 | left-right directionality, although the corresponding |
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368 | Unicode characters have neutral directionality |
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369 | So, for best compatibility, confine filenames to the standard |
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370 | 7-bit ASCII character set. |
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371 | |||
372 | If you generate a filename list of your archive (unzip -l), |
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373 | you will see the converted filenames. Your can also extract |
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374 | the archive with the switch '-i' (= ignore mac filenames), |
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375 | and test your result. |
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376 | |||
377 | This MacZip port uses its own filename stored in the |
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378 | archive. At the moment, the filename will be not converted. |
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379 | However, I'm planning to add support for Unicode. |
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380 | |||
381 | Currently, the following Mac OS encodings are NOT supported: |
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382 | Japanese, ChineseTrad, Korean, Arabic, Hebrew, Greek, |
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383 | Cyrillic, Devanagari, Gurmukhi, Gujarati, Oriya, Bengali, |
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384 | Tamil, Telugu Kannada, Malayalam, Sinhalese, Burmese, Khmer, |
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385 | Thai, Laotian, Georgian, Armenian, ChineseSimp, Tibetan, |
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386 | Mongolian, Ethiopic, Vietnamese, ExtArabic and finally: |
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387 | Symbol - this is the encoding for the font named "Symbol". |
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388 | Dingbats - this is the encoding for the font named "Zapf Dingbats". |
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389 | If you extract an archive coded with one of these |
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390 | charsets you will probably get filenames with funny |
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391 | characters. |
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392 | |||
393 | These problems apply only to filenames and NOT to the file |
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394 | content. |
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395 | of course: The content of the files will NEVER be converted !! |
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396 | |||
397 | |||
398 | |||
399 | File-/Creator Type: |
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400 | ------------- |
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401 | |||
402 | This port uses the creator type 'IZip' and it is registered |
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403 | at Apple (since 08. March 1998). File types can not be |
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404 | registered any more. This port uses 'ZIP ' for Zip archive |
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405 | files. The creator 'IZip' type should be used for all future |
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406 | versions of MacZip. |
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407 | |||
408 | |||
409 | |||
410 | Hints for proper restoration of file-time stamps: |
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411 | ------------------------------------------------- |
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412 | |||
413 | UnZip requires the host computer to have proper time zone |
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414 | information in order to handle certain tasks correctly (see |
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415 | unzip.txt). To set the time zone on the Macintosh, go to |
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416 | the Map Control Panel and enter the correct number of hours |
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417 | (and, in a few locales, minutes) offset from Universal |
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418 | Time/Greenwich Mean Time. For example, the US Pacific time |
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419 | zone is -8 hours from UTC/GMT during standard (winter) time |
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420 | and -7 hours from UTC/GMT during Daylight Savings Time. The |
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421 | US Eastern time zone is -5 hours during the winter and -4 |
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422 | hours during the summer. |
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423 | |||
424 | Discussion of Daylight Savings Time |
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425 | ----------------------------------- |
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426 | The setting in the Date & Time control panel for Daylight |
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427 | Savings time is a universal setting. That is, it assumes |
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428 | everybody in the world is observing Daylight Savings time |
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429 | when its check box is selected. |
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430 | |||
431 | If other areas of the world are not observing Daylight |
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432 | Savings time when the check box is selected in the Date & |
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433 | Time control panel, then the Map control panel will be off |
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434 | by an hour for all areas that are not recognizing Daylight |
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435 | Savings time. |
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436 | |||
437 | Conversely, if you set the Map control panel to an area that |
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438 | does not observe Daylight Savings time and deselect/uncheck |
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439 | the check box for Daylight Savings time in the Date & Time |
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440 | control panel, then time in all areas celebrating Daylight |
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441 | Savings time will be off by an hour in the Map control |
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442 | panel. |
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443 | |||
444 | Example: |
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445 | In the case of Hawaiians, sometimes they are three hours |
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446 | behind Pacific Standard Time (PST) and sometimes two hours |
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447 | behind Pacific Daylight Time (PDT). The Map control panel |
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448 | can only calculate differences between time zones relative |
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449 | to Greenwich Mean Time (GMT). Hawaii will always show up as |
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450 | three hours past the Pacific time zone and five hours past |
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451 | the Central time zone. |
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452 | |||
453 | When Hawaiians are not observing Daylight Savings time, but |
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454 | the rest of the country is, there is no combination of |
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455 | settings in Map and Date & Time control panels which will |
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456 | enable you to display Hawaiian local time correctly AND |
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457 | concurrently display the correct time in other places that |
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458 | do observe Daylight Savings time. |
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459 | |||
460 | The knowledge about which countries observe Daylight Savings |
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461 | time and which do not is not built into the Map control |
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462 | panel, so it does not allow for such a complex calculation. |
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463 | |||
464 | This same situation also occurs in other parts of the world |
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465 | besides Hawaii. Phoenix, Arizona is an example of an area of |
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466 | the U.S. which also does not observe Daylight Savings time. |
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467 | |||
468 | Conclusion: |
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469 | MacZip only knows the GMT and DST offsets of the |
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470 | current time, not for the time in question. |
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471 | |||
472 | |||
473 | Projects & Packages: |
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474 | -------------------- |
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475 | |||
476 | A Note to version numbers: Version of MacZip is currently |
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477 | 1.06 and is based on the zip code version 2.3 and unzip code |
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478 | version 5.42. See About Box for current version and compiler |
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479 | build date. |
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480 | |||
481 | Because of the amount of sources I splitted this port into |
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482 | several projects. See http://www.sitec.net/maczip for |
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483 | updates. |
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484 | |||
485 | - core source parts: |
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486 | unzxxx.zip |
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487 | zipxxx.zip |
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488 | These archives contains the main parts of the port. You can |
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489 | build libraries and a standalone App with Metrowerks |
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490 | standard console SIOUX. They contain only sources, no |
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491 | executables. These archives are exact copies of the standard |
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492 | Info-ZIP source distributions; they were only repackaged |
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493 | under MacOS using MacZip, with one minor addition: For those |
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494 | files that are stored in BinHex'ed format in the Info-ZIP |
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495 | reference source archives, unpacked version that are ready |
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496 | for use have been added. |
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497 | |||
498 | - additional source part: |
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499 | MacZipxxx.zip: contains all the GUI stuff and the project |
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500 | files to build the main-app. Only sources of the GUI, no |
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501 | zip or unzip code. To build MacZip successfully you will |
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502 | need to also download the zip and unzip packages. |
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503 | |||
504 | - executables: |
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505 | MacZipxxxnc.hqx: contains only executables and 'README.TXT', |
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506 | This version is without en-/decryption support ! |
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507 | MacZipxxxc.hqx: contains only executables and 'README.TXT', |
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508 | This version supports en-/decryption ! |
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509 | |||
510 | - encryption sources: |
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511 | zcryptxx.zip: To build crypt versions of MacZip. |
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512 | download from ftp://ftp.icce.rug.nl/infozip/ (and subdirectories) |
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513 | |||
514 | - documentation: |
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515 | MacZipDocu.zip: contains some further docus about the algorithm, |
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516 | limits, Info-ZIP's appnote and a How-to-do Webpage. |
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517 | |||
518 | |||
519 | Credits: |
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520 | -------- |
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521 | |||
522 | Macstuff.c and recurse.c: All the functions are from More Files. |
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523 | More Files fixes many of the broken or underfunctional parts of |
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524 | the file system. Thanks to Jim Luther. (see morefiles.doc) |
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525 | |||
526 | |||
527 | |||
528 | |||
529 | --------------------------------------------------------------------------- |
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530 | Footnotes: |
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531 | |||
532 | 1. wildcard: |
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533 | The '*' is a wildcard and means 'all files' |
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534 | Just in case you don't know wildcards: |
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535 | '*' is a place holder for any character. |
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536 | e.g.: |
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537 | "this*" matches with "this_file" or "this_textfile" but it |
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538 | doesn't match with "only_this_file" or "first_this_textfile" |
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539 | "*this*" matches with "this_file" or "this_textfile" AND |
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540 | matches with "only_this_file" or "first_this_textfile" |
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541 | |||
542 | |||
543 | 2. Mac pathnames: |
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544 | The following characteristics of Macintosh pathnames should |
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545 | be noted: |
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546 | |||
547 | A full pathname never begins with a colon, but must contain |
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548 | at least one colon. |
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549 | A partial pathname always begins with a colon separator except |
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550 | in the case where the file partial pathname is a simple file or |
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551 | directory name. |
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552 | Single trailing separator colons in full or partial pathnames |
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553 | are ignored except in the case of full pathnames to volumes. |
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554 | In full pathnames to volumes, the trailing separator colon is |
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555 | required. |
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556 | Consecutive separator colons can be used to ascend a level |
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557 | from a directory to its parent directory. Two consecutive |
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558 | separator colons will ascend one level, three consecutive |
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559 | separator colons will ascend two levels, and so on. Ascending |
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560 | can only occur from a directory; not a file. |
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561 | |||
562 | |||
563 | |||
564 | |||
565 | |||
566 | --------------------------------------------------------------------------- |
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567 | |||
568 | Dirk Haase |
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569 | ========== |