/usr/share/hol88-2.02.19940316/lisp/f-freadth.l is in hol88-source 2.02.19940316-28.
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;;; HOL 88 Version 2.0 ;;;
;;; ;;;
;;; FILE NAME: f-freadth.l ;;;
;;; ;;;
;;; DESCRIPTION: Fast theory read in CL (except Lucid). NOTE THAT ;;;
;;; THIS CODE IS ONLY FOR COMMON LISP HOL AND NOT FRANZ ;;;
;;; LISP HOL ;;;
;;; AUTHOR: John Carroll, University of Cambridge (May 1990) ;;;
;;; ;;;
;;; USES FILES: f-cl.l, f-macro.l ;;;
;;; ;;;
;;; University of Cambridge ;;;
;;; Hardware Verification Group ;;;
;;; Computer Laboratory ;;;
;;; New Museums Site ;;;
;;; Pembroke Street ;;;
;;; Cambridge CB2 3QG ;;;
;;; England ;;;
;;; ;;;
;;; COPYRIGHT: University of Edinburgh ;;;
;;; COPYRIGHT: University of Cambridge ;;;
;;; COPYRIGHT: INRIA ;;;
;;; ;;;
;;; REVISION HISTORY: (none) ;;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;; *** Patch to lisp/f-thyfns.l
(eval-when (load eval)
(warn "lisp/f-freadth.l is redefining function THY-READ"))
(eval-when (compile) (include "lisp/f-macro"))
(defun thy-read (thy #+franz piport #-franz *standard-input*)
(second ; to ignore the (quote ...)
(third ; to ignore the (setq %theorydata ...)
(errortrap
#'(lambda (ertok) (msg-failwith %failtok thy " theory damaged"))
;; Franz-compatible theory reader only applicable in
;; CL - also not much use on non-unix architectures
;; added PC to exclusions (JAC 19.06.92)
#+(or franz :macintosh pc lucid) (llread)
#-(or franz :macintosh pc lucid) (fast-read-theory *standard-input*))
)))
;;; *** End of patch to lisp/f-thyfns.l
;;; Following are symbols within theory data to make sure end up in
;;; upper case, to agree with their casing in rest of HOL CL code
(defvar *fast-read-upper-case*
(make-hash-table :size 40 :test #'equal))
(eval-when (load eval)
(mapc
'(lambda (str)
(setf (gethash str *fast-read-upper-case*)
(intern (string-upcase str))))
'("%t" "abs" "comb" "const" "pred" "var")))
;;; Minimal 'readtable' just for reading in theory files
(defvar *fast-read-char-vector*
(make-array 256 :initial-element :constituent))
(eval-when (load eval)
(mapc
'(lambda (char)
(setf (svref *fast-read-char-vector* (char-int char))
nil)) ; whitespace
'(#\space #\newline #\tab #\linefeed))
(mapc
'(lambda (char)
(setf (svref *fast-read-char-vector* (char-int char))
:non-constituent))
'(#\( #\)))
(setf (svref *fast-read-char-vector* (char-int #\\))
:single-escape)
(setf (svref *fast-read-char-vector* (char-int #\|))
:multiple-escape)
(setf (svref *fast-read-char-vector* (char-int #\"))
:string-quote))
;;;
(eval-when (compile load eval)
(defmacro eq-chars (x y)
`(char= (the character ,x) (the character ,y))))
(defun fast-peek-skipping (stream)
;; the same as (peek-char t ,stream nil nil)
(declare (optimize (speed 3) (safety 0)))
(let ((char (read-char stream nil nil)))
#+(or kcl akcl) (declare (object char))
(loop
(unless char (return))
(when
(svref (the simple-vector *fast-read-char-vector*)
(the fixnum (char-int (the character char))))
(unread-char char stream)
(return))
(setq char (read-char stream nil nil)))))
;;;
(defun fast-read-theory (stream)
(fast-peek-skipping stream)
(fast-read-expr stream (read-char stream) 1))
(defun fast-read-expressions (stream level)
(declare (optimize (speed 3) (safety 0)))
(let ((exps nil) (char nil))
(loop
(setq char (read-char stream))
(cond
((eq-chars char #\))
(fast-peek-skipping stream)
(return (nreverse exps)))
((eq-chars char #\.)
(fast-peek-skipping stream)
(let ((res (nreverse exps)))
(rplacd (last res)
(fast-read-expr stream (read-char stream) level))
;; assume followed immediately by right parenthesis
(read-char stream)
(fast-peek-skipping stream)
(return res)))
(t
(push (fast-read-expr stream char level)
exps))))))
(defun fast-read-expr (stream char level)
(declare (optimize (speed 3) (safety 0)))
(cond
((eq-chars char #\')
;; assume no whitespace after quote
(list 'quote (fast-read-expr stream (read-char stream) (1+ level))))
((eq-chars char #\()
;; assume no whitespace after open parenthesis
(let ((exps (fast-read-expressions stream (1+ level))))
(when (= level 4)
(setf (car exps) (intern (string (car exps)))))
exps))
(t
(fast-read-atom stream char))))
;;; Changed buffer from a static string to being held in a special variable
;;; since IBCL choked on it (JAC 19.06.92)
(defvar *fast-read-atom-buffer* (make-string 256))
(defun fast-read-atom (stream char)
(declare (optimize (speed 3) (safety 0)))
(let
((buffer *fast-read-atom-buffer*)
(index 0)
(number-p (digit-char-p (the character char)))
(string-p nil)
(multiple-escape-p nil) (escaped-p nil)
type)
(declare (fixnum index))
(loop
(setq type
(svref (the simple-vector *fast-read-char-vector*)
(the fixnum (char-int (the character char)))))
(cond
((eq type :single-escape)
(setq escaped-p t)
(setf (schar buffer index) (read-char stream))
(incf index))
((eq type :multiple-escape)
(setq escaped-p t)
(setq multiple-escape-p (not multiple-escape-p)))
((eq type :string-quote)
(if string-p (return) (setq string-p t)))
((or (eq type :constituent) multiple-escape-p string-p)
(setf
(schar (the string buffer) (the fixnum index))
char)
(setq index (the fixnum (1+ (the fixnum index)))))
((null type) ; whitespace
(fast-peek-skipping stream)
(return))
(t ; :non-constituent
(unread-char char stream)
(return))
)
(setq char (read-char stream)))
(if number-p
(parse-integer buffer :end index)
(do*
((res (make-string index))
(x 0 (the fixnum (1+ (the fixnum x)))))
((= (the fixnum x) (the fixnum index))
(cond
(string-p res)
(escaped-p (intern res))
((gethash res *fast-read-upper-case*))
(t (intern res))))
(declare (fixnum x))
(setf (schar (the string res) x)
(the character (schar (the string buffer) x)))))))
;;; End of file
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