CWE-ou-minkata/Sources/Plasma/Apps/plPlasmaInstaller/plUnzip.cpp

/*==LICENSE==*

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Copyright (C) 2011  Cyan Worlds, Inc.

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*==LICENSE==*/
#include "HeadSpin.h"
#include "plUnzip.h"
#include "hsTypes.h"
#include "hsWindows.h"
#include "hsStream.h"

plUnzip::plUnzip() : fFile(nil)
{
}

bool plUnzip::Open(const char* filename)
{
    fFile = unzOpen(filename);
    return (fFile != nil);
}

bool plUnzip::Close()
{
    bool ret = false;

    if (fFile != nil)
    {
        ret = (UNZ_OK == unzClose(fFile));
        fFile = nil;
    }

    return ret;
}

void plUnzip::IGetFullPath(const char* destDir, const char* filename, char* outFilename)
{
    // Make sure the dest ends with a slash
    strcpy(outFilename, destDir);
    char lastChar = outFilename[strlen(outFilename)-1];
    if (lastChar != '\\' && lastChar != '/')
        strcat(outFilename, "\\");

    // Check if the output filename has any directories in it
    const char* forward = strrchr(filename, '/');
    const char* backward = strrchr(filename, '\\');

    if (!forward && !backward)
    {
        CreateDirectory(outFilename, NULL);
        strcat(outFilename, filename);
    }
    else
    {
        const char* fileOnly = (forward > backward) ? forward+1 : backward+1;
        strncat(outFilename, filename, fileOnly-filename);
        CreateDirectory(outFilename, NULL);

        strcat(outFilename, fileOnly);
    }
}

void plUnzip::IExtractCurrent(const char* destDir, char* fileName)
{
    char filename[MAX_PATH];
    if (unzGetCurrentFileInfo(fFile, nil, filename, sizeof(filename), nil, 0, nil, 0) == UNZ_OK)
    {
        strcpy(fileName, filename);

        if (unzOpenCurrentFile(fFile) == UNZ_OK)
        {
            char outFilename[MAX_PATH];
            IGetFullPath(destDir, filename, outFilename);

            // Make sure to take off the read-only flag if the file exists, and is RO
            DWORD attrs = GetFileAttributes(outFilename);
            if (attrs != INVALID_FILE_ATTRIBUTES && (attrs & FILE_ATTRIBUTE_READONLY))
                SetFileAttributes(outFilename, attrs & ~FILE_ATTRIBUTE_READONLY);

            hsUNIXStream outFile;
            if (outFile.Open(outFilename, "wb"))
            {
                char buf[2048];
                int numRead;
                while ((numRead = unzReadCurrentFile(fFile, buf, sizeof(buf))) > 0)
                {
                    outFile.Write(numRead, buf);
                }

                outFile.Close();

                unz_file_info_s info;
                unzGetCurrentFileInfo(fFile, &info, NULL, 0, NULL, 0, NULL, 0);

                SYSTEMTIME sysTime = {0};
                sysTime.wDay    = info.tmu_date.tm_mday;
                sysTime.wMonth  = info.tmu_date.tm_mon+1;
                sysTime.wYear   = info.tmu_date.tm_year;
                sysTime.wHour   = info.tmu_date.tm_hour;
                sysTime.wMinute = info.tmu_date.tm_min;
                sysTime.wSecond = info.tmu_date.tm_sec;

                FILETIME localFileTime, utcFileTime;
                SystemTimeToFileTime(&sysTime, &localFileTime);

                LocalFileTimeToFileTime(&localFileTime, &utcFileTime);

                HANDLE hFile = CreateFile(outFilename, GENERIC_WRITE, FILE_SHARE_READ, NULL, OPEN_EXISTING, 0, NULL);
                SetFileTime(hFile, NULL, NULL, &utcFileTime);
                CloseHandle(hFile);
            }

            unzCloseCurrentFile(fFile);
        }
    }
}

void plUnzip::ExtractAll(const char* destDir)
{
    if (unzGoToFirstFile(fFile) != UNZ_OK)
        return;

    do
    {
        IExtractCurrent(destDir);
    }
    while (unzGoToNextFile(fFile) == UNZ_OK);
}

bool plUnzip::ExtractNext(const char* destDir, char* fileName)
{
    IExtractCurrent(destDir, fileName);
    return (unzGoToNextFile(fFile) == UNZ_OK);
}