Function xmlBufAdd

ThirdParty/libxml2/vtklibxml2/buf.c:756–800

* xmlBufAdd: * @buf: the buffer to dump * @str: the #xmlChar string * @len: the number of #xmlChar to add * * Add a string range to an XML buffer. if len == -1, the length of * str is recomputed. * * Returns 0 if successful, -1 in case of error. */

 * Returns 0 if successful, -1 in case of error.
 */
int
xmlBufAdd(xmlBufPtr buf, const xmlChar *str, int len) {
    size_t needSize;

    if ((str == NULL) || (buf == NULL) || (buf->error))
	return -1;
    CHECK_COMPAT(buf)

    if (len < -1) {
	return -1;
    }
    if (len == 0) return 0;

    if (len < 0)
        len = xmlStrlen(str);

    if (len < 0) return -1;
    if (len == 0) return 0;

    /* Note that both buf->size and buf->use can be zero here. */
    if ((size_t) len >= buf->size - buf->use) {
        if ((size_t) len >= SIZE_MAX - buf->use) {
            xmlBufMemoryError(buf);
            return(-1);
        }
        needSize = buf->use + len + 1;
	if (buf->alloc == XML_BUFFER_ALLOC_BOUNDED) {
	    /*
	     * Used to provide parsing limits
	     */
	    if (needSize >= XML_MAX_TEXT_LENGTH) {
		xmlBufMemoryError(buf);
		return(-1);
	    }
	}
        if (!xmlBufResize(buf, needSize))
            return(-1);
    }

    memmove(&buf->content[buf->use], str, len);
    buf->use += len;
    buf->content[buf->use] = 0;
    UPDATE_COMPAT(buf)
    return 0;
}

/**
 * xmlBufCat: