;;;; -*- Mode: Lisp; Syntax: ANSI-Common-Lisp; Base: 10; Package: umlisp -*-
;;;; *************************************************************************
;;;; FILE IDENTIFICATION
;;;;
;;;; Name:          parse-macros.lisp
;;;; Purpose:       Macros for UMLS file parsing
;;;; Programmer:    Kevin M. Rosenberg
;;;; Date Started:  Apr 2000
;;;;
;;;; $Id: parse-macros.lisp,v 1.4 2003/05/06 01:34:57 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)


(defmacro with-umls-file ((line filename) &body body)
"Opens a UMLS and processes each parsed line with (body) argument"
  (let ((ustream (gensym "STRM-"))
	(eof (gensym "EOF-")))
    `(with-open-file
	 (,ustream (umls-pathname ,filename) :direction :input)
       (do ((,line (read-umls-line ,ustream ,eof)
		   (read-umls-line ,ustream ,eof)))
	   ((eq ,line 'eof) t)
	 ,@body))))

(defmacro with-buffered-umls-file ((line filename) &body body)
  "Opens a UMLS and processes each parsed line with (body) argument"
  (let ((ustream (gensym "STRM-"))
	(buffer (gensym "BUF-"))
	(eof (gensym "EOF-")))
    `(let ((,buffer (make-fields-buffer)))
       (with-open-file
	   (,ustream (umls-pathname ,filename) :direction :input)
	 (do ((,line (read-buffered-fields ,buffer ,ustream #\| ,eof)
		     (read-buffered-fields ,buffer ,ustream #\| ,eof)))
	     ((eq ,line ,eof) t)
	   ,@body)))))

(defmacro with-buffered2-umls-file ((line filename) &body body)
  "Opens a UMLS and processes each parsed line with (body) argument"
  (let ((ustream (gensym "STRM-"))
	(buffer (gensym "BUF-"))
	(eof (gensym "EOF-")))
    `(let ((,buffer (make-fields-buffer2)))
       (with-open-file
	   (,ustream (umls-pathname ,filename)
		     :direction :input :if-exists :overwrite)
	 (do ((,line (read-buffered-fields ,buffer ,ustream #\| ,eof)
		     (read-buffered-fields ,buffer ,ustream #\| ,eof)))
	     ((eq ,line ,eof) t)
	   ,@body)))))