xslt_process with more than ten parameters - patch

Hello

One Czech pg user reported problems with function xslt_process. This
function is coded with ten parameters limit.

Attached patch add support to unlimited number of parameters.

const char **
parse_params(text *paramstr)
{
	char	   *pos;
	char	   *pstr;
	char	   *nvsep = "=";
	char	   *itsep = ",";
	const char **params;
	int	nparams;
	int	mparams;		/* max params */
	
	pstr = text_to_cstring(paramstr);
	
	mparams = INIT_PARAMS;
	params = (const char **) palloc(INIT_PARAMS * sizeof(char *) + 1);

	pos = pstr;
	nparams = 0;
	while (*pos != '\0')
	{
		if (nparams >= mparams)
		{
			/* extend params params */
			mparams += EXTEND_PARAMS;
			params = (const char **) repalloc(params, mparams * sizeof(char *) + 1);
		}
		params[nparams++] = pos;
		pos = strstr(pos, nvsep);
		if (pos != NULL)
		{
			*pos = '\0';
			pos++;
		}
		else
		{
			/* No equal sign, so ignore this "parameter" */
			/* We'll reset params[i] to NULL below the loop */
			nparams--;
			break;
		}

		/* since MAXPARAMS is even, we still have i < MAXPARAMS */
		params[nparams++] = pos;
		pos = strstr(pos, itsep);
		if (pos != NULL)
		{
			*pos = '\0';
			pos++;
		}
		else
			break;
	}

	params[nparams] = NULL;

	return params;
}

Regards
Pavel Stehule