Function xmlBufferAdd

ThirdParty/libxml2/vtklibxml2/tree.c:7536–7567

* xmlBufferAdd: * @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 successful, a positive error code number otherwise * and -1 in case of internal or API error. */

 *         and -1 in case of internal or API error.
 */
int
xmlBufferAdd(xmlBufferPtr buf, const xmlChar *str, int len) {
    unsigned int needSize;

    if ((str == NULL) || (buf == NULL)) {
	return -1;
    }
    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 ((unsigned) len >= buf->size - buf->use) {
        if ((unsigned) len >= UINT_MAX - buf->use)
            return XML_ERR_NO_MEMORY;
        needSize = buf->use + len + 1;
        if (!xmlBufferResize(buf, needSize))
            return XML_ERR_NO_MEMORY;
    }

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

/**
 * xmlBufferAddHead: