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Diffstat (limited to 'skribe/src/stklos/eval.stk')
| -rw-r--r-- | skribe/src/stklos/eval.stk | 149 |
1 files changed, 149 insertions, 0 deletions
diff --git a/skribe/src/stklos/eval.stk b/skribe/src/stklos/eval.stk new file mode 100644 index 0000000..3acace9 --- /dev/null +++ b/skribe/src/stklos/eval.stk @@ -0,0 +1,149 @@ +;;;; +;;;; 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-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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