Function xmlInputDefaultOpen

ThirdParty/libxml2/vtklibxml2/xmlIO.c:1168–1274

* xmlInputDefaultOpen: * @buf: input buffer to be filled * @filename: filename or URI * * Returns an xmlParserErrors code. */

 * Returns an xmlParserErrors code.
 */
static int
xmlInputDefaultOpen(xmlParserInputBufferPtr buf, const char *filename) {
    int ret;
    int fd;

#ifdef LIBXML_FTP_ENABLED
    if (xmlIOFTPMatch(filename)) {
        buf->context = xmlIOFTPOpen(filename);

        if (buf->context != NULL) {
            buf->readcallback = xmlIOFTPRead;
            buf->closecallback = xmlIOFTPClose;
            return(XML_ERR_OK);
        }
    }
#endif /* LIBXML_FTP_ENABLED */

#ifdef LIBXML_HTTP_ENABLED
    if (xmlIOHTTPMatch(filename)) {
        buf->context = xmlIOHTTPOpen(filename);

        if (buf->context != NULL) {
            buf->readcallback = xmlIOHTTPRead;
            buf->closecallback = xmlIOHTTPClose;
            return(XML_ERR_OK);
        }
    }
#endif /* LIBXML_HTTP_ENABLED */

    if (!xmlFileMatch(filename))
        return(XML_IO_ENOENT);

#ifdef LIBXML_LZMA_ENABLED
    {
        xzFile xzStream;

        ret = xmlFdOpen(filename, 0, &fd);
        if (ret != XML_ERR_OK)
            return(ret);

        xzStream = __libxml2_xzdopen(filename, fd, "rb");

        if (xzStream == NULL) {
            close(fd);
        } else {
            /*
             * Non-regular files like pipes can't be reopened.
             * If a file isn't seekable, we pipe uncompressed
             * input through xzlib.
             */
            if ((lseek(fd, 0, SEEK_CUR) < 0) ||
                (__libxml2_xzcompressed(xzStream) > 0)) {
                buf->context = xzStream;
                buf->readcallback = xmlXzfileRead;
                buf->closecallback = xmlXzfileClose;
                buf->compressed = 1;

                return(XML_ERR_OK);