;;;; -*- Mode: Lisp; Syntax: ANSI-Common-Lisp; Base: 10; Package: umlisp -*-
;;;; *************************************************************************
;;;; FILE IDENTIFICATION
;;;;
;;;; Name:          utils.lisp
;;;; Purpose:       Low-level utility functions for UMLisp
;;;; Author:        Kevin M. Rosenberg
;;;; Date Started:  Apr 2000
;;;;
;;;; $Id: utils.lisp,v 1.4 2003/05/06 02:14:59 kevin Exp $
;;;;
;;;; This file, part of UMLisp, is
;;;;    Copyright (c) 2000-2002 by Kevin M. Rosenberg, M.D.
;;;;
;;;; UMLisp users are granted the rights to distribute and use this software
;;;; as governed by the terms of the GNU General Public License.
;;;; *************************************************************************
 
(in-package #:umlisp)

(eval-when (:compile-toplevel)
  (declaim (optimize (speed 3) (safety 1) (compilation-speed 0) (debug 3))))

(declaim (inline make-cuisui make-cuilui parse-ui parse-cui))

(defmacro def-metaclass-reader (field)
  "Create function for reading slot of metaclass"
  `(defun ,field (cl)
     (car (slot-value (class-of cl) ',field))))

(defmacro def-metaclass-reader-car (field)
  "Create function for reading slot of metaclass"
  `(defun ,field (cl)
     (car (slot-value (class-of cl) ',field))))

;;; Field transformations

(defun parse-ui (s &optional (nullvalue 0))
  "Return integer value for a UMLS unique identifier."
  (if (< (length s) 2)
      nullvalue
    (parse-integer s :start 1)))

(defun parse-cui (cui)
  (if (stringp cui)
      (let ((ch (aref cui 0)))
	(if (eql ch #\C)
	    (parse-ui cui)
	  (parse-integer cui)))
    cui))
    
(defun parse-lui (lui)
  (if (stringp lui)
      (let ((ch (aref lui 0)))
	(if (eql ch #\L)
	    (parse-ui lui)
	  (parse-integer lui)))
    lui))
    
(defun parse-sui (sui)
  (if (stringp sui)
      (let ((ch (aref sui 0)))
	(if (eql ch #\S)
	    (parse-ui sui)
	  (parse-integer sui)))
    sui))
    
(defun parse-tui (tui)
  (if (stringp tui)
      (let ((ch (aref tui 0)))
	(if (eql ch #\T)
	    (parse-ui tui)
	  (parse-integer tui)))
    tui))

(defun parse-eui (eui)
  (if (stringp eui)
      (let ((ch (aref eui 0)))
	(if (eql ch #\E)
	    (parse-ui eui)
	  (parse-integer eui)))
    eui))
    
(defconstant +cuisui-scale+ 10000000)

(defun make-cuisui (cui sui)
  (+ (* +cuisui-scale+ cui) sui))

(defun make-cuilui (cui lui)
  (+ (* +cuisui-scale+ cui) lui))

(defun decompose-cuisui (cuisui)
  "Returns the CUI and SUI of a cuisui number"
  (floor cuisui cuisui +cuisui-scale+))

;;; Lookup functions for uterms,ustr in ucons

(defun find-uterm-in-ucon (ucon lui)
  (find lui (s#term ucon) :key #'lui :test 'equal))

(defun find-ustr-in-uterm (uterm sui)
  (find sui (s#str uterm) :key #'sui :test 'equal))

(defun find-ustr-in-ucon (ucon sui)
  (dolist (uterm (s#term ucon))
    (dolist (ustr (s#str uterm))
      (when (string-equal sui (sui ustr))
	(return-from find-ustr-in-ucon ustr)))))