Function htmlCheckEncoding

ThirdParty/libxml2/vtklibxml2/HTMLparser.c:3675–3699

* htmlCheckEncoding: * @ctxt: an HTML parser context * @attvalue: the attribute value * * Checks an http-equiv attribute from a Meta tag to detect * the encoding * If a new encoding is detected the parser is switched to decode * it and pass UTF8 */

 * it and pass UTF8
 */
static void
htmlCheckEncoding(htmlParserCtxtPtr ctxt, const xmlChar *attvalue) {
    const xmlChar *encoding;
    xmlChar *copy;

    if (!attvalue)
	return;

    encoding = xmlStrcasestr(attvalue, BAD_CAST"charset");
    if (encoding != NULL) {
	encoding += 7;
    }
    /*
     * skip blank
     */
    if (encoding && IS_BLANK_CH(*encoding))
	encoding = xmlStrcasestr(attvalue, BAD_CAST"=");
    if (encoding && *encoding == '=') {
	encoding ++;
        copy = xmlStrdup(encoding);
        if (copy == NULL)
            htmlErrMemory(ctxt);
	xmlSetDeclaredEncoding(ctxt, copy);
    }
}

/**
 * htmlCheckMeta: