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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 implémenter maintenant skribe-warning/node
+
+
+(define-module (skribe eval)
+ :export (skribe-eval skribe-eval-port skribe-load skribe-load-options
+ skribe-include))
+
+(use-modules (skribe debug)
+ (skribe engine)
+ (skribe verify)
+ (skribe resolve)
+ (skribe output)
+ (ice-9 optargs))
+
+
+(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 #:key (engine #f) (path #f) #:rest opt)
+ (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))))))))