Add mes and mescc-tools-extra

mescc-tools-extra contains two important tools:
- cp
- chmod

mes first builds itself from a mes 0.21 seed as used by guix, and then
builds a mes 0.22 and then mes 0.22 using that created mes 0.22.

It does /not/ use bootstrap.sh as we don't have a proper shell at this
point, it has been manually adapted for kaem.

sysa/mes-0.22/module/mescc/bytevectors.scm

@@ -0,0 +1,74 @@
+;;; GNU Mes --- Maxwell Equations of Software
+;;; Copyright © 2016,2017,2018 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
+;;;
+;;; This file is part of GNU Mes.
+;;;
+;;; GNU Mes 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 3 of the License, or (at
+;;; your option) any later version.
+;;;
+;;; GNU Mes 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 GNU Mes.  If not, see <http://www.gnu.org/licenses/>.
+
+;;; Commentary:
+
+;;; Code:
+
+(define-module (mescc bytevectors)
+  #:use-module (mes guile)
+  #:export (bytevector-u64-native-set!
+            bytevector-u32-native-set!
+            bytevector-u16-native-set!
+            bytevector-u8-set!
+            make-bytevector))
+
+;; rnrs compatibility
+(define (bytevector-u64-native-set! bv index value)
+  (when (not (= 0 index)) (error "bytevector-u64-native-set! index not zero: " index " value: " value))
+  (let ((x (list
+            (modulo value #x100)
+            (modulo (ash value -8) #x100)
+            (modulo (ash value -16) #x100)
+            (modulo (ash value -24) #x100)
+            (modulo (ash value -32) #x100)
+            (modulo (ash value -40) #x100)
+            (modulo (ash value -48) #x100)
+            (modulo (ash value -56) #x100))))
+    (set-car! bv (car x))
+    (set-cdr! bv (cdr x))
+    x))
+
+(define (bytevector-u32-native-set! bv index value)
+  (when (not (= 0 index)) (error "bytevector-u32-native-set! index not zero: " index " value: " value))
+  (let ((x (list
+            (modulo value #x100)
+            (modulo (ash value -8) #x100)
+            (modulo (ash value -16) #x100)
+            (modulo (ash value -24) #x100))))
+    (set-car! bv (car x))
+    (set-cdr! bv (cdr x))
+    x))
+
+(define (bytevector-u16-native-set! bv index value)
+  (when (not (= 0 index)) (error "bytevector-u16-native-set! index not zero: " index " value: " value))
+  (let ((x (list
+            (modulo value #x100)
+            (modulo (ash value -8) #x100))))
+    (set-car! bv (car x))
+    (set-cdr! bv (cdr x))
+    x))
+
+(define (bytevector-u8-set! bv index value)
+  (when (not (= 0 index)) (error "bytevector-u8-set! index not zero: " index " value: " value))
+  (let ((x (modulo value #x100)))
+    (set-car! bv x)
+    x))
+
+(define (make-bytevector length)
+  (make-list length 0))