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;;;;
;;;; eval.stk -- Skribe Evaluator
;;;;
;;;; Copyright � 2003-2004 Erick Gallesio - I3S-CNRS/ESSI <eg@essi.fr>
;;;;
;;;;
;;;; This program is free software; you can redistribute it and/or modify
;;;; it under the terms of the GNU General Public License as published by
;;;; the Free Software Foundation; either version 2 of the License, or
;;;; (at your option) any later version.
;;;;
;;;; This program is distributed in the hope that it will be useful,
;;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;;;; GNU General Public License for more details.
;;;;
;;;; You should have received a copy of the GNU General Public License
;;;; along with this program; if not, write to the Free Software
;;;; Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
;;;; USA.
;;;;
;;;; Author: Erick Gallesio [eg@essi.fr]
;;;; Creation date: 27-Jul-2003 09:15 (eg)
;;;; Last file update: 28-Oct-2004 15:05 (eg)
;;;;
;; FIXME; On peut impl�menter maintenant skribe-warning/node
(define-module SKRIBE-EVAL-MODULE
(import SKRIBE-DEBUG-MODULE SKRIBE-ENGINE-MODULE SKRIBE-VERIFY-MODULE
SKRIBE-RESOLVE-MODULE SKRIBE-OUTPUT-MODULE)
(export skribe-eval skribe-eval-port skribe-load skribe-load-options
skribe-include)
(define *skribe-loaded* '()) ;; List of already loaded files
(define *skribe-load-options* '())
(define (%evaluate expr)
(with-handler
(lambda (c)
(flush-output-port (current-error-port))
(raise c))
(eval expr (find-module 'STklos))))
;;;
;;; SKRIBE-EVAL
;;;
(define (skribe-eval a e :key (env '()))
(with-debug 2 'skribe-eval
(debug-item "a=" a " e=" (engine-ident e))
(let ((a2 (resolve! a e env)))
(debug-item "resolved a=" a)
(let ((a3 (verify a2 e)))
(debug-item "verified a=" a3)
(output a3 e)))))
;;;
;;; SKRIBE-EVAL-PORT
;;;
(define (skribe-eval-port port engine :key (env '()))
(with-debug 2 'skribe-eval-port
(debug-item "engine=" engine)
(let ((e (if (symbol? engine) (find-engine engine) engine)))
(debug-item "e=" e)
(if (not (is-a? e <engine>))
(skribe-error 'skribe-eval-port "Cannot find engine" engine)
(let loop ((exp (read port)))
(with-debug 10 'skribe-eval-port
(debug-item "exp=" exp))
(unless (eof-object? exp)
(skribe-eval (%evaluate exp) e :env env)
(loop (read port))))))))
;;;
;;; SKRIBE-LOAD
;;;
(define *skribe-load-options* '())
(define (skribe-load-options)
*skribe-load-options*)
(define (skribe-load file :rest opt :key engine path)
(with-debug 4 'skribe-load
(debug-item " engine=" engine)
(debug-item " path=" path)
(debug-item " opt" opt)
(let* ((ei (cond
((not engine) *skribe-engine*)
((engine? engine) engine)
((not (symbol? engine)) (skribe-error 'skribe-load
"Illegal engine" engine))
(else engine)))
(path (cond
((not path) (skribe-path))
((string? path) (list path))
((not (and (list? path) (every? string? path)))
(skribe-error 'skribe-load "Illegal path" path))
(else path)))
(filep (find-path file path)))
(set! *skribe-load-options* opt)
(unless (and (string? filep) (file-exists? filep))
(skribe-error 'skribe-load
(format "Cannot find ~S in path" file)
*skribe-path*))
;; Load this file if not already done
(unless (member filep *skribe-loaded*)
(cond
((> *skribe-verbose* 1)
(format (current-error-port) " [loading file: ~S ~S]\n" filep opt))
((> *skribe-verbose* 0)
(format (current-error-port) " [loading file: ~S]\n" filep)))
;; Load it
(with-input-from-file filep
(lambda ()
(skribe-eval-port (current-input-port) ei)))
(set! *skribe-loaded* (cons filep *skribe-loaded*))))))
;;;
;;; SKRIBE-INCLUDE
;;;
(define (skribe-include file :optional (path (skribe-path)))
(unless (every string? path)
(skribe-error 'skribe-include "Illegal path" path))
(let ((path (find-path file path)))
(unless (and (string? path) (file-exists? path))
(skribe-error 'skribe-load
(format "Cannot find ~S in path" file)
path))
(when (> *skribe-verbose* 0)
(format (current-error-port) " [including file: ~S]\n" path))
(with-input-from-file path
(lambda ()
(let Loop ((exp (read (current-input-port)))
(res '()))
(if (eof-object? exp)
(if (and (pair? res) (null? (cdr res)))
(car res)
(reverse! res))
(Loop (read (current-input-port))
(cons (%evaluate exp) res))))))))
)
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