C++ iterator::key方法代码示例

static void EraseGpsTags(Exiv2::ExifData &ExifInfo)
{
	// Search through, find the keys that we want, and wipe them
	// Code below submitted by Marc Horowitz
	Exiv2::ExifData::iterator Iter;
	for (Exiv2::ExifData::iterator Iter = ExifInfo.begin();
		Iter != ExifInfo.end(); )
	{
		if (Iter->key().find("Exif.GPSInfo") == 0)
			Iter = ExifInfo.erase(Iter);
		else
			Iter++;
	}
}

int main(int argc,const char* argv[])
{
    int result=0;
    const char* program = argv[0];

    const char* types[typeMax];
    types[typeUnknown  ] = "unknown";
    types[typeDirectory] = "directory";
    types[typeImage    ] = "image";
    types[typeXML      ] = "xml";
    types[typeDoc      ] = "doc";
    types[typeCode     ] = "code";
    types[typeFile     ] = "file";

    char const* keywords[kwMAX];
    memset(keywords,0,sizeof(keywords));
    keywords[kwHELP    ] = "help";
    keywords[kwVERSION ] = "version";
    keywords[kwVERBOSE ] = "verbose";
    keywords[kwDRYRUN  ] = "dryrun";
    keywords[kwDST     ] = "dst";
    keywords[kwADJUST  ] = "adjust";
    keywords[kwTZ      ] = "tz";
    keywords[kwDELTA   ] = "delta";

    map<std::string,string> shorts;
    shorts["-?"] = "-help";
    shorts["-h"] = "-help";
    shorts["-v"] = "-verbose";
    shorts["-V"] = "-version";
    shorts["-d"] = "-dst";
    shorts["-a"] = "-adjust";
    shorts["-t"] = "-tz";
    shorts["-D"] = "-delta";
    shorts["-s"] = "-delta";
    shorts["-X"] = "-dryrun";

    Options options ;
    options.help    = sina(keywords[kwHELP   ],argv) || argc < 2;
    options.verbose = sina(keywords[kwVERBOSE],argv);
    options.dryrun  = sina(keywords[kwDRYRUN ],argv);
    options.version = sina(keywords[kwVERSION],argv);
    options.dst     = sina(keywords[kwDST    ],argv);
    options.dryrun  = sina(keywords[kwDRYRUN ],argv);

    for ( int i = 1 ; !result && i < argc ; i++ ) {
        const char* arg   = argv[i++];
        if ( shorts.count(arg) ) arg = shorts[arg].c_str();

        const char* value = argv[i  ];
        int        ivalue = ::atoi(value?value:"0");
        int         key   = ::find(arg,keywords,kwMAX);
        int         needv = key < kwMAX && key > (-kwNOVALUE);

        if (!needv ) i--;
        if ( needv && !value) key = kwNEEDVALUE;

        switch ( key ) {
            case kwDST      : options.dst     = true ; break;
            case kwHELP     : options.help    = true ; break;
            case kwVERSION  : options.version = true ; break;
            case kwDRYRUN   : options.dryrun  = true ; break;
            case kwVERBOSE  : options.verbose = true ; break;
            case kwTZ       : Position::tz_      = parseTZ(value);break;
            case kwADJUST   : Position::adjust_  = ivalue;break;
            case kwDELTA    : Position::deltaMax_= ivalue;break;
            case kwNEEDVALUE: fprintf(stderr,"error: %s requires a value\n",arg); result = resultSyntaxError ; break ;
            case kwSYNTAX   : default:
            {
                int  type   = getFileType(arg,options) ;
                if ( options.verbose ) printf("%s %s ",arg,types[type]) ;
                if ( type == typeImage ) {
                    time_t t    = readImageTime(std::string(arg)) ;
                    char*  path = realpath(arg,NULL);
                    if  ( t && path ) {
                        if ( options.verbose) printf("%s %ld %s",path,(long int)t,asctime(localtime(&t)));
                        gFiles.push_back(path);
                    }
                    if ( path ) :: free((void*) path);
                }
                if ( type == typeUnknown ) {
                    fprintf(stderr,"error: illegal syntax %s\n",arg);
                    result = resultSyntaxError ;
                }
                if ( options.verbose ) printf("\n") ;
            }break;
        }
    }

    if ( options.help    ) ::help(program,keywords,kwMAX,options.verbose);
    if ( options.version ) ::version(program);

    if ( !result ) {
        sort(gFiles.begin(),gFiles.end(),mySort);
        if ( options.dst ) Position::dst_ = 3600;
        if ( options.verbose ) {
            int t = Position::tz();
            int d = Position::dst();
            int a = Position::adjust();
            int A = Position::Adjust();
//.........这里部分代码省略.........

bool KExiv2::Private::saveOperations(const QFileInfo& finfo, Exiv2::Image::AutoPtr image) const
{
    try
    {
        Exiv2::AccessMode mode;
        bool wroteComment = false, wroteEXIF = false, wroteIPTC = false, wroteXMP = false;

        // We need to load target file metadata to merge with new one. It's mandatory with TIFF format:
        // like all tiff file structure is based on Exif.
        image->readMetadata();

        // Image Comments ---------------------------------

        mode = image->checkMode(Exiv2::mdComment);

        if ((mode == Exiv2::amWrite) || (mode == Exiv2::amReadWrite))
        {
            image->setComment(imageComments());
            wroteComment = true;
        }

        // Exif metadata ----------------------------------

        mode = image->checkMode(Exiv2::mdExif);

        if ((mode == Exiv2::amWrite) || (mode == Exiv2::amReadWrite))
        {
            if (image->mimeType() == "image/tiff")
            {
                Exiv2::ExifData orgExif = image->exifData();
                Exiv2::ExifData newExif;
                QStringList     untouchedTags;

                // With tiff image we cannot overwrite whole Exif data as well, because
                // image data are stored in Exif container. We need to take a care about
                // to not lost image data.
                untouchedTags << "Exif.Image.ImageWidth";
                untouchedTags << "Exif.Image.ImageLength";
                untouchedTags << "Exif.Image.BitsPerSample";
                untouchedTags << "Exif.Image.Compression";
                untouchedTags << "Exif.Image.PhotometricInterpretation";
                untouchedTags << "Exif.Image.FillOrder";
                untouchedTags << "Exif.Image.SamplesPerPixel";
                untouchedTags << "Exif.Image.StripOffsets";
                untouchedTags << "Exif.Image.RowsPerStrip";
                untouchedTags << "Exif.Image.StripByteCounts";
                untouchedTags << "Exif.Image.XResolution";
                untouchedTags << "Exif.Image.YResolution";
                untouchedTags << "Exif.Image.PlanarConfiguration";
                untouchedTags << "Exif.Image.ResolutionUnit";

                for (Exiv2::ExifData::iterator it = orgExif.begin(); it != orgExif.end(); ++it)
                {
                    if (untouchedTags.contains(it->key().c_str()))
                    {
                        newExif[it->key().c_str()] = orgExif[it->key().c_str()];
                    }
                }

                Exiv2::ExifData readedExif = exifMetadata();

                for (Exiv2::ExifData::iterator it = readedExif.begin(); it != readedExif.end(); ++it)
                {
                    if (!untouchedTags.contains(it->key().c_str()))
                    {
                        newExif[it->key().c_str()] = readedExif[it->key().c_str()];
                    }
                }

                image->setExifData(newExif);
            }
            else
            {
                image->setExifData(exifMetadata());
            }

            wroteEXIF = true;
        }

        // Iptc metadata ----------------------------------

        mode = image->checkMode(Exiv2::mdIptc);

        if ((mode == Exiv2::amWrite) || (mode == Exiv2::amReadWrite))
        {
            image->setIptcData(iptcMetadata());
            wroteIPTC = true;
        }

        // Xmp metadata -----------------------------------

        mode = image->checkMode(Exiv2::mdXmp);

        if ((mode == Exiv2::amWrite) || (mode == Exiv2::amReadWrite))
        {
#ifdef _XMP_SUPPORT_
            image->setXmpData(xmpMetadata());
            wroteXMP = true;
#endif
        }
//.........这里部分代码省略.........