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- ;;;; slib.scm --- definitions needed to get SLIB to work with Guile
- ;;;;
- ;;;; Copyright (C) 1997, 1998, 2000, 2001, 2002 Free Software Foundation, Inc.
- ;;;;
- ;;;; This file is part of GUILE.
- ;;;;
- ;;;; GUILE 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.
- ;;;;
- ;;;; GUILE 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 GUILE; see the file COPYING. If not, write to the
- ;;;; Free Software Foundation, Inc., 59 Temple Place, Suite 330,
- ;;;; Boston, MA 02111-1307 USA
- ;;;;
- ;;;; As a special exception, the Free Software Foundation gives permission
- ;;;; for additional uses of the text contained in its release of GUILE.
- ;;;;
- ;;;; The exception is that, if you link the GUILE library with other files
- ;;;; to produce an executable, this does not by itself cause the
- ;;;; resulting executable to be covered by the GNU General Public License.
- ;;;; Your use of that executable is in no way restricted on account of
- ;;;; linking the GUILE library code into it.
- ;;;;
- ;;;; This exception does not however invalidate any other reasons why
- ;;;; the executable file might be covered by the GNU General Public License.
- ;;;;
- ;;;; This exception applies only to the code released by the
- ;;;; Free Software Foundation under the name GUILE. If you copy
- ;;;; code from other Free Software Foundation releases into a copy of
- ;;;; GUILE, as the General Public License permits, the exception does
- ;;;; not apply to the code that you add in this way. To avoid misleading
- ;;;; anyone as to the status of such modified files, you must delete
- ;;;; this exception notice from them.
- ;;;;
- ;;;; If you write modifications of your own for GUILE, it is your choice
- ;;;; whether to permit this exception to apply to your modifications.
- ;;;; If you do not wish that, delete this exception notice.
- ;;;;
- (define-module (ice-9 slib)
- :export (slib:load
- implementation-vicinity
- library-vicinity
- home-vicinity
- scheme-implementation-type
- scheme-implementation-version
- make-random-state
- require)
- :no-backtrace)
-
-
-
- (define (eval-load <filename> evl)
- (if (not (file-exists? <filename>))
- (set! <filename> (string-append <filename> (scheme-file-suffix))))
- (call-with-input-file <filename>
- (lambda (port)
- (let ((old-load-pathname *load-pathname*))
- (set! *load-pathname* <filename>)
- (do ((o (read port) (read port)))
- ((eof-object? o))
- (evl o))
- (set! *load-pathname* old-load-pathname)))))
-
-
-
- (define slib:exit quit)
- (define slib:error error)
- (define slib:warn warn)
- (define slib:eval (lambda (x) (eval x slib-module)))
- (define defmacro:eval (lambda (x) (eval x (interaction-environment))))
- (define logical:logand logand)
- (define logical:logior logior)
- (define logical:logxor logxor)
- (define logical:lognot lognot)
- (define logical:ash ash)
- (define logical:logcount logcount)
- (define logical:integer-length integer-length)
- (define logical:bit-extract bit-extract)
- (define logical:integer-expt integer-expt)
- (define logical:ipow-by-squaring ipow-by-squaring)
- (define slib:eval-load eval-load)
- (define slib:tab #\tab)
- (define slib:form-feed #\page)
-
- (define slib-module (current-module))
-
- (define (defined? symbol)
- (module-defined? slib-module symbol))
-
- (define slib:features
- (append '(source
- eval
- abort
- alist
- defmacro
- delay
- dynamic-wind
- full-continuation
- hash
- hash-table
- line-i/o
- logical
- multiarg/and-
- multiarg-apply
- promise
- rev2-procedures
- rev4-optional-procedures
- string-port
- with-file)
-
- (if (defined? 'getenv)
- '(getenv)
- '())
-
- (if (defined? 'current-time)
- '(current-time)
- '())
-
- (if (defined? 'system)
- '(system)
- '())
-
- (if (defined? 'array?)
- '(array)
- '())
-
- (if (defined? 'char-ready?)
- '(char-ready?)
- '())
-
- (if (defined? 'array-for-each)
- '(array-for-each)
- '())
-
- (if (and (string->number "0.0") (inexact? (string->number "0.0")))
- '(inexact)
- '())
-
- (if (rational? (string->number "1/19"))
- '(rational)
- '())
-
- (if (real? (string->number "0.0"))
- '(real)
- ())
-
- (if (complex? (string->number "1+i"))
- '(complex)
- '())
-
- (let ((n (string->number "9999999999999999999999999999999")))
- (if (and n (exact? n))
- '(bignum)
- '()))))
-
-
- ;;; FIXME: Because uers want require to search the path, this uses
- ;;; load-from-path, which probably isn't a hot idea. slib
- ;;; doesn't expect this function to search a path, so I expect to get
- ;;; bug reports at some point complaining that the wrong file gets
- ;;; loaded when something accidentally appears in the path before
- ;;; slib, etc. ad nauseum. However, the right fix seems to involve
- ;;; changing catalog:get in slib/require.scm, and I don't expect
- ;;; Aubrey will integrate such a change. So I'm just going to punt
- ;;; for the time being.
- (define (slib:load name)
- (save-module-excursion
- (lambda ()
- (set-current-module slib-module)
- (let ((errinfo (catch 'system-error
- (lambda ()
- (load-from-path name)
- #f)
- (lambda args args))))
- (if (and errinfo
- (catch 'system-error
- (lambda ()
- (load-from-path
- (string-append name ".scm"))
- #f)
- (lambda args args)))
- (apply throw errinfo))))))
-
- (define slib:load-source slib:load)
- (define defmacro:load slib:load)
-
- (define slib-parent-dir
- (let* ((path (%search-load-path "slib/require.scm")))
- (if path
- (substring path 0 (- (string-length path) 17))
- (error "Could not find slib/require.scm in " %load-path))))
-
- (define (implementation-vicinity)
- (string-append slib-parent-dir "/"))
- (define (library-vicinity)
- (string-append (implementation-vicinity) "slib/"))
- (define home-vicinity
- (let ((home-path (getenv "HOME")))
- (lambda () home-path)))
- (define (scheme-implementation-type) 'guile)
- (define (scheme-implementation-version) "")
-
- (define (output-port-width . arg) 80)
- (define (output-port-height . arg) 24)
- (define (identity x) x)
-
- ;;; {Random numbers}
- ;;;
- (define (make-random-state . args)
- (let ((seed (if (null? args) *random-state* (car args))))
- (cond ((string? seed))
- ((number? seed) (set! seed (number->string seed)))
- (else (let ()
- (require 'object->string)
- (set! seed (object->limited-string seed 50)))))
- (seed->random-state seed)))
-
- ;;; {Time}
- ;;;
-
- (define difftime -)
- (define offset-time +)
-
-
- (define %system-define define)
-
- (define define
- (procedure->memoizing-macro
- (lambda (exp env)
- (if (= (length env) 1)
- `(define-public ,@(cdr exp))
- `(%system-define ,@(cdr exp))))))
-
- ;;; Hack to make syncase macros work in the slib module
- (if (nested-ref the-root-module '(app modules ice-9 syncase))
- (set-object-property! (module-local-variable (current-module) 'define)
- '*sc-expander*
- '(define)))
-
- (define (software-type)
- "Return a symbol describing the current platform's operating system.
- This may be one of AIX, VMS, UNIX, COHERENT, WINDOWS, MS-DOS, OS/2,
- THINKC, AMIGA, ATARIST, MACH, or ACORN.
-
- Note that most varieties of Unix are considered to be simply \"UNIX\".
- That is because when a program depends on features that are not present
- on every operating system, it is usually better to test for the presence
- or absence of that specific feature. The return value of
- @code{software-type} should only be used for this purpose when there is
- no other easy or unambiguous way of detecting such features."
- 'UNIX)
-
- (slib:load (in-vicinity (library-vicinity) "require.scm"))
-
- (define require require:require)
-
- ;; {Extensions to the require system so that the user can add new
- ;; require modules easily.}
-
- (define *vicinity-table*
- (list
- (cons 'implementation (implementation-vicinity))
- (cons 'library (library-vicinity))))
-
- (define (install-require-vicinity name vicinity)
- (let ((entry (assq name *vicinity-table*)))
- (if entry
- (set-cdr! entry vicinity)
- (set! *vicinity-table*
- (acons name vicinity *vicinity-table*)))))
-
- (define (install-require-module name vicinity-name file-name)
- (if (not *catalog*) ;Fix which loads catalog in slib
- (catalog:get 'random)) ;(doesn't load the feature 'random)
- (let ((entry (assq name *catalog*))
- (vicinity (cdr (assq vicinity-name *vicinity-table*))))
- (let ((path-name (in-vicinity vicinity file-name)))
- (if entry
- (set-cdr! entry path-name)
- (set! *catalog*
- (acons name path-name *catalog*))))))
-
- (define (make-exchanger obj)
- (lambda (rep) (let ((old obj)) (set! obj rep) old)))
-