Igor Pro 9 will include an UnzipFile operation.

Here is a barebones utility for the reverse process, creating an archive. I haven't tested it much, especially on Windows. This overwrites existing archives.

function zipGUI()
    // get a list of files to zip
    variable refnum
    string fileFilters = "All Files:.*;"
    Open /D/R/F=fileFilters/MULT=1/M="Select files to zip" refnum
    if (strlen(S_fileName) == 0)
        return 0
    zipFiles(ReplaceString("\r", S_fileName, ";"), "")

// utility function, creates a zip archive
// all paths are junked, no subfolders are preserved.
// not tested much on windows
function zipFiles(string FilePathListStr, string zipPathStr)
    int verbose = 1 // choose whether to print output from executescripttext
    string msg = "", cmd = "", zipFileStr = ""
    int i, numfiles
    numfiles = ItemsInList(FilePathListStr)
    for (i=0;i<numfiles;i+=1)
        GetFileFolderInfo /Q/Z StringFromList(i, FilePathListStr)  
        if (V_Flag || V_isFile==0)
            printf "Could not find %s\r", StringFromList(i, FilePathListStr)
            return 0
    if (strlen(zipPathStr) == 0)
        zipPathStr = SpecialDirPath("Desktop",0,0,0)
        zipFileStr = ""
        DoAlert 1, "Zip to"
        if (v_flag == 2)
            return 0
        if (cmpstr(zipFileStr[strlen(zipFileStr)-1], ":") == 0)
            zipFileStr = ""
            zipFileStr = ParseFilePath(0, zipPathStr, ":", 1, 0)
            zipPathStr = ParseFilePath(1, zipPathStr, ":", 1, 0)
        GetFileFolderInfo /Q/Z zipPathStr
        if (V_Flag || V_isFolder==0)
            sprintf msg, "Could not find zipPathStr folder\rCreate %s?", zipPathStr
            DoAlert 1, msg
            if (v_flag == 2)
                return 0
    // make sure zipPathStr folder exists - necessary for mac
    NewPath /C/O/Q acw_tmpPath, zipPathStr
    KillPath /Z acw_tmpPath

    if (stringmatch(StringByKey("OS", IgorInfo(3))[0,2],"Win")) // Windows
        string strVersion = StringByKey("OSVERSION", IgorInfo(3))
        variable WinVersion = str2num(strVersion) // turns "" into 10.1 and 6.23.111 into 6.2 (windows 8.0)
        if (WinVersion<6.3)
            Print "zipArchive requires Windows 10 or later"
            return 0
        zipPathStr = ParseFilePath(5, zipPathStr, "\\", 0, 0)
        cmd = "powershell.exe Compress-Archive -Force -LiteralPath "
        string strPath
        for (i=0;i<numFiles;i+=1)
            strPath = ParseFilePath(5, StringFromList(i, FilePathListStr), "\\", 0, 0)
            strPath = replacestring("'", strPath, "''")
            cmd += SelectString(i>0, "", ", ") + "'" + strPath + "'"
        strPath = replacestring("'", zipPathStr + zipFileStr, "''")
        cmd += " -DestinationPath '" + strPath + "'"
    else // Mac
        zipPathStr = ParseFilePath(5, zipPathStr, "/", 0, 0)
        sprintf cmd, "zip -j -r -X \\\"%s%s\\\"", zipPathStr, zipFileStr
        for (i=0;i<numfiles;i++)
            cmd += " \\\"" + ParseFilePath(5, StringFromList(i, FilePathListStr), "/", 0,0) + "\\\""
        sprintf cmd, "do shell script \"%s\"", cmd
    ExecuteScriptText /B/UNQ/Z cmd
    if (verbose)
        Print S_value // output from executescripttext
    return (v_flag == 0)


Awesome! This gives me an Idea to write something for loading zipped data. Some data files I use even have a compression ratio > 100! I wonder if there is a smart way to unzip a file directly into Igor's memory. I guess the approach would be to unzip into a temporary file, load the file and then delete the temporary file. It's a bit scary to wrangle with files on disk that way.

Both my hack for Igor 8 and Igor 9's UnzipFile work only with file input, so you'd have to add the temporary file step. There's an XOP that's supposed to work with strings.

You could take a look at the way I deal with unzipping to a temporary file in the Updater project.

Yeah, I will take a look. I want to release some projects of mine soon, so I wanted to get to the updater anyway to make things compatible.




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