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;;; High-level compiler interface
;; Copyright (C) 2001, 2009 Free Software Foundation, Inc.
;; 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, 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; see the file COPYING. If not, write to
;; the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
;; Boston, MA 02111-1307, USA.
;;; Code:
(define-module (system base compile)
#:use-module (system base syntax)
#:use-module (system base language)
#:use-module (system vm vm) ;; FIXME: there's a reason for this, can't remember why tho
#:use-module (ice-9 regex)
#:use-module (ice-9 optargs)
#:use-module (ice-9 receive)
#:export (syntax-error
*current-language*
compiled-file-name compile-file compile-and-load
compile
decompile)
#:export-syntax (call-with-compile-error-catch))
;;;
;;; Compiler environment
;;;
(define (syntax-error loc msg exp)
(throw 'syntax-error-compile-time loc msg exp))
(define-macro (call-with-compile-error-catch thunk)
`(catch 'syntax-error-compile-time
,thunk
(lambda (key loc msg exp)
(if (pair? loc)
(let ((file (or (assq-ref loc 'filename) "unknown file"))
(line (assq-ref loc 'line))
(col (assq-ref loc 'column)))
(format (current-error-port)
"~A:~A:~A: ~A: ~A~%" file line col msg exp))
(format (current-error-port)
"unknown location: ~A: ~S~%" msg exp)))))
;;;
;;; Compiler
;;;
(define *current-language* (make-fluid))
(fluid-set! *current-language* 'scheme)
(define (current-language)
(fluid-ref *current-language*))
(define (call-once thunk)
(let ((entered #f))
(dynamic-wind
(lambda ()
(if entered
(error "thunk may only be entered once: ~a" thunk))
(set! entered #t))
thunk
(lambda () #t))))
(define (call-with-output-file/atomic filename proc)
(let* ((template (string-append filename ".XXXXXX"))
(tmp (mkstemp! template)))
(call-once
(lambda ()
(with-throw-handler #t
(lambda ()
(proc tmp)
(chmod tmp (logand #o0666 (lognot (umask))))
(close-port tmp)
(rename-file template filename))
(lambda args
(delete-file template)))))))
(define (ensure-language x)
(if (language? x)
x
(lookup-language x)))
(define* (compile-file file #:key
(output-file #f)
(env #f)
(from (current-language))
(to 'objcode)
(opts '()))
(let ((comp (or output-file (compiled-file-name file)))
(in (open-input-file file)))
(call-with-output-file/atomic comp
(lambda (port)
((language-printer (ensure-language to))
(read-and-compile in #:env env #:from from #:to to #:opts opts)
port)))
comp))
(define* (compile-and-load file #:key (to 'value) (opts '()))
(read-and-compile (open-input-port file)
#:from lang #:to to #:opts opts))
(define (compiled-file-name file)
(let ((base (basename file))
(cext (cond ((or (null? %load-compiled-extensions)
(string-null? (car %load-compiled-extensions)))
(warn "invalid %load-compiled-extensions"
%load-compiled-extensions)
".go")
(else (car %load-compiled-extensions)))))
(let lp ((exts %load-extensions))
(cond ((null? exts) (string-append file cext))
((string-null? (car exts)) (lp (cdr exts)))
((string-suffix? (car exts) base)
(string-append
(dirname file) "/"
(substring base 0
(- (string-length base) (string-length (car exts))))
cext))
(else (lp (cdr exts)))))))
;;;
;;; Compiler interface
;;;
(define (compile-passes from to opts)
(map cdr
(or (lookup-compilation-order from to)
(error "no way to compile" from "to" to))))
(define (compile-fold passes exp env opts)
(let lp ((passes passes) (x exp) (e env) (cenv env) (first? #t))
(if (null? passes)
(values x e cenv)
(receive (x e new-cenv) ((car passes) x e opts)
(lp (cdr passes) x e (if first? new-cenv cenv) #f)))))
(define (find-language-joint from to)
(let lp ((in (reverse (or (lookup-compilation-order from to)
(error "no way to compile" from "to" to))))
(lang to))
(cond ((null? in)
(error "don't know how to join expressions" from to))
((language-joiner lang) lang)
(else
(lp (cdr in) (caar in))))))
(define* (read-and-compile port #:key
(env #f)
(from (current-language))
(to 'objcode)
(opts '()))
(let ((from (ensure-language from))
(to (ensure-language to)))
(let ((joint (find-language-joint from to)))
(with-fluids ((*current-language* from))
(let lp ((exps '()) (env #f) (cenv env))
(let ((x ((language-reader (current-language)) port)))
(cond
((eof-object? x)
(compile ((language-joiner joint) (reverse exps) env)
#:from joint #:to to #:env env #:opts opts))
(else
;; compile-fold instead of compile so we get the env too
(receive (jexp jenv jcenv)
(compile-fold (compile-passes (current-language) joint opts)
x cenv opts)
(lp (cons jexp exps) jenv jcenv))))))))))
(define* (compile x #:key
(env #f)
(from (current-language))
(to 'value)
(opts '()))
(receive (exp env cenv)
(compile-fold (compile-passes from to opts) x env opts)
exp))
;;;
;;; Decompiler interface
;;;
(define (decompile-passes from to opts)
(map cdr
(or (lookup-decompilation-order from to)
(error "no way to decompile" from "to" to))))
(define (decompile-fold passes exp env opts)
(if (null? passes)
(values exp env)
(receive (exp env) ((car passes) exp env opts)
(decompile-fold (cdr passes) exp env opts))))
(define* (decompile x #:key
(env #f)
(from 'value)
(to 'assembly)
(opts '()))
(decompile-fold (decompile-passes from to opts)
x
env
opts))
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