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|
;; Copyright (c) 1991-2002, The Numerical Algorithms Group Ltd.
;; All rights reserved.
;; Copyright (C) 2007-2011, Gabriel Dos Reis.
;; All rights reserved.
;;
;; Redistribution and use in source and binary forms, with or without
;; modification, are permitted provided that the following conditions are
;; met:
;;
;; - Redistributions of source code must retain the above copyright
;; notice, this list of conditions and the following disclaimer.
;;
;; - Redistributions in binary form must reproduce the above copyright
;; notice, this list of conditions and the following disclaimer in
;; the documentation and/or other materials provided with the
;; distribution.
;;
;; - Neither the name of The Numerical Algorithms Group Ltd. nor the
;; names of its contributors may be used to endorse or promote products
;; derived from this software without specific prior written permission.
;;
;; THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
;; IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
;; TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
;; PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
;; OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
;; EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
;; PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
;; PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
;; LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
;; NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
;; SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
; NAME: BootLex.lisp
; PURPOSE: Parsing support routines for Boot and Spad code
; CONTENTS:
;
; 0. Global parameters
; 1. BOOT File Handling
; 2. BOOT Line Handling
; 3. BOOT Token Handling
; 4. BOOT Token Parsing Actions
; 5. BOOT Error Handling
(import-module "sys-globals")
(IMPORT-MODULE "preparse")
(IMPORT-MODULE "macros")
(IMPORT-MODULE "nlib")
(in-package "BOOT")
; *** 0. Global parameters
; *** 1. BOOT file handling
(defun init-boot/spad-reader ()
(setq $SPAD_ERRORS (VECTOR 0 0 0))
(setq SPADERRORSTREAM |$OutputStream|)
(setq File-Closed nil)
(Next-Lines-Clear)
(setq Boot-Line-Stack nil)
(ioclear))
(defmacro test (x &rest y)
`(progn
(setq spaderrorstream t)
(in-boot)
(initialize-preparse |$InputStream|)
(,(intern (strconc "PARSE-" x)) . ,y)))
(defun print-defun (name body)
(let* ((sp (assoc 'compiler-output-stream optionlist))
(st (if sp (cdr sp) |$OutputStream|)))
(if (and (is-console st) (symbolp name) (fboundp name)
(not (compiled-function-p (symbol-function name))))
(compile name))
(when (or |$PrettyPrint| (not (is-console st)))
(print-full body st) (force-output st))))
(defun spad (&optional
(*spad-input-file* nil)
(*spad-output-file* nil)
&aux
;; (*comp370-apply* (function print-and-eval-defun))
(*comp370-apply* (function print-defun))
(*fileactq-apply* (function print-defun))
($SPAD T)
(OPTIONLIST nil)
(*EOF* NIL)
(File-Closed NIL)
(/editfile *spad-input-file*)
in-stream out-stream)
(declare (special |$Echo| /editfile *comp370-apply* *EOF*
File-Closed Xcape))
(setq |$InteractiveMode| nil)
;; only rebind |$InteractiveFrame| if compiling
(progv (if (not |$InteractiveMode|) '(|$InteractiveFrame|))
(if (not |$InteractiveMode|)
(list (|addBinding|
'|$DomainsInScope|
`((FLUID . |true|)
(|special| . ,(COPY-TREE |$InitialDomainsInScope|)))
(|addBinding| '|$Information| NIL (|makeInitialModemapFrame|)))))
(init-boot/spad-reader)
(unwind-protect
(progn
(setq in-stream (if *spad-input-file*
(open *spad-input-file* :direction :input)
|$InputStream|))
(initialize-preparse in-stream)
(setq out-stream (if *spad-output-file*
(open *spad-output-file* :direction :output)
|$OutputStream|))
(when *spad-output-file*
(format out-stream "~&;;; -*- Mode:Lisp; Package:Boot -*-~%~%")
(print-package "BOOT"))
(setq |$OutputStream| out-stream)
(loop
(if (or *eof* file-closed) (return nil))
(catch 'SPAD_READER
(if (setq Boot-Line-Stack (PREPARSE in-stream))
(let ((LINE (cdar Boot-Line-Stack)))
(declare (special LINE))
(|PARSE-NewExpr|)
(let ((parseout (|popStack1|)) )
(when parseout
(let ((|$OutputStream| out-stream))
(S-PROCESS parseout))
(format out-stream "~&")))
;(IOClear in-stream out-stream)
)))
(IOClear in-stream out-stream)))
(if *spad-input-file* (shut in-stream))
(if *spad-output-file* (shut out-stream)))
T))
(defun READ-SPAD1 (FN FT FM TO)
(LET ((STRM IN-STREAM))
(SETQ $MAXLINENUMBER 0)
(SETQ $SPAD_ERRORS (VECTOR 0 0 0))
(SETQ IN-STREAM (open (strconc fm ">" fn "." ft) :direction :input))
($ERASE (LIST FN 'ERROR 'A))
(SETQ OUT-STREAM (if TO (open to :direction :output) OUT-STREAM))
(SETQ SPADERRORSTREAM (open (strconc "a>" fn ".error") :direction :output))
(READ-SPAD-1)
(close SPADERRORSTREAM)
(SETQ IN-STREAM STRM)
(OR (EQUAL #(0 0 0) $SPAD_ERRORS)
(|sayBrightly| (LIST '|%b| (ELT $SPAD_ERRORS 0) '|%d| '|syntax errors|
'|%l| '|%b| (ELT $SPAD_ERRORS 1) '|%d| '|precompilation errors|
'|%l| '|%b| (ELT $SPAD_ERRORS 2) '|%d| '|semantic errors| '|%l|)))
(+ (ELT $SPAD_ERRORS 0) (ELT $SPAD_ERRORS 1) (ELT $SPAD_ERRORS 2))))
; *** 2. BOOT Line Handling ***
; See the file PREPARSE.LISP for the hard parts of BOOT line processing.
(defun next-BOOT-line (&optional (in-stream t))
"Get next line, trimming trailing blanks and trailing comments.
One trailing blank is added to a non-blank line to ease between-line
processing for Next Token (i.e., blank takes place of return). Returns T
if it gets a non-blank line, and NIL at end of stream."
(if Boot-Line-Stack
(let ((Line-Number (caar Boot-Line-Stack))
(Line-Buffer (suffix #\Space (cdar Boot-Line-Stack))))
(pop Boot-Line-Stack)
(Line-New-Line Line-Buffer Current-Line Line-Number)
(setq |$currentLine| (setq LINE Line-Buffer))
Line-Buffer)))
; *** 3. BOOT Token Handling ***
(defun get-BOOT-token (token)
"If you have an _, go to the next line.
If you have a . followed by an integer, get a floating point number.
Otherwise, get a .. identifier."
(if (not (boot-skip-blanks))
nil
(let ((token-type (boot-token-lookahead-type (current-char))))
(case token-type
(eof (token-install nil '*eof token nonblank))
(escape (advance-char)
(get-boot-identifier-token token t))
(argument-designator (get-argument-designator-token token))
(id (get-boot-identifier-token token))
(num (get-spad-integer-token token))
(string (get-SPADSTRING-token token))
(special-char (get-special-token token))
(t (get-gliph-token token token-type))))))
(defun boot-skip-blanks ()
(setq nonblank t)
(loop (let ((cc (current-char)))
(if (not cc) (return nil))
(if (eq (boot-token-lookahead-type cc) 'white)
(progn (setq nonblank nil) (if (not (advance-char)) (return nil)))
(return t)))))
(defun boot-token-lookahead-type (char)
"Predicts the kind of token to follow, based on the given initial character."
(cond ((not char) 'eof)
((char= char #\_) 'escape)
((and (char= char #\#) (digitp (next-char))) 'argument-designator)
((digitp char) 'num)
((and (char= char #\$) $boot
(alpha-char-p (next-char))) 'id)
((or (char= char #\%) (char= char #\?)
(char= char #\!) (alpha-char-p char)) 'id)
((char= char #\") 'string)
((member char
'(#\Space #\Tab #\Return)
:test #'char=) 'white)
((get (intern (string char)) 'Gliph))
(t 'special-char)))
(defun get-argument-designator-token (token)
(advance-char)
(get-number-token token)
(token-install (intern (strconc "#" (format nil "~D" (token-symbol token))))
'argument-designator token nonblank))
(defun get-boot-identifier-token (token &optional (escaped? nil))
"An identifier consists of an escape followed by any character, a %, ?,
or an alphabetic, followed by any number of escaped characters, digits,
or the chracters ?, !, ' or %"
(prog ((buf (make-adjustable-string 0))
(default-package NIL))
(suffix (current-char) buf)
(advance-char)
id (let ((cur-char (current-char)))
(cond ((char= cur-char #\_)
(if (not (advance-char)) (go bye))
(suffix (current-char) buf)
(setq escaped? t)
(if (not (advance-char)) (go bye))
(go id))
((and (null default-package)
(char= cur-char #\'))
(setq default-package buf)
(setq buf (make-adjustable-string 0))
(if (not (advance-char)) (go bye))
(go id))
((or (alpha-char-p cur-char)
(digitp cur-char)
(member cur-char '(#\% #\' #\? #\!) :test #'char=))
(suffix (current-char) buf)
(if (not (advance-char)) (go bye))
(go id))))
bye (if (and (stringp default-package)
(or (not (find-package default-package)) ;; not a package name
(every #'(lambda (x) (eql x #\')) buf))) ;;token ends with ''
(setq buf (concatenate 'string default-package "'" buf)
default-package nil))
(setq buf (intern buf (or default-package "BOOT")))
(return (token-install
buf
(if (and (not escaped?)
(member buf Keywords :test #'eq))
'keyword 'identifier)
token
nonblank))))
(defun get-gliph-token (token gliph-list)
(prog ((buf (make-adjustable-string 0)))
(suffix (current-char) buf)
(advance-char)
loop (setq gliph-list (assoc (intern (string (current-char))) gliph-list))
(if gliph-list
(progn (suffix (current-char) buf)
(pop gliph-list)
(advance-char)
(go loop))
(let ((new-token (intern buf)))
(return (token-install (or (get new-token 'renametok) new-token)
'gliph token nonblank))))))
(defun get-SPADSTRING-token (token)
"With TOK=\" and ABC\" on IN-STREAM, extracts and stacks string ABC"
(PROG ((BUF (make-adjustable-string 0)))
(if (char/= (current-char) #\") (RETURN NIL) (advance-char))
(loop
(if (char= (current-char) #\") (return nil))
(SUFFIX (if (char= (current-char) #\_)
(advance-char)
(current-char))
BUF)
(if (null (advance-char)) ;;end of line
(PROGN (|sayBrightly| "Close quote inserted") (RETURN nil)))
)
(advance-char)
(return (token-install (copy-seq buf) ;should make a simple string
'spadstring token))))
;; -*- Parse an integer number -*-
;; The number may be written in plain format, where the radix
;; is implicitly taken to be 10. Or the spelling can explicitly
;; specify a radix. That radix can be anything in the range 2..36
;; Subroutine GET-NUMBER-TOKEN-MAYBE-WITH-RADIX.
;; Read a the characters of a decimal integer and returns its
;; value.
(defun get-decimal-number-token (buf)
(tagbody lp
(suffix (current-char) buf)
(let ((next-chr (next-char)))
(cond ((digitp next-chr)
(advance-char)
(go lp)))))
(parse-integer buf))
;; Subroutine of GET-NUMBER-TOKEN-MAYBE-WITH-RADIX.
;; We just read the radix of an integer number; parse the
;; digits forming that integer token.
(defun get-integer-in-radix (buf r)
(unless (> r 1)
(spad_syntax_error))
(let ((mark (1+ (size buf))))
(tagbody lp
(suffix (current-char) buf)
(let* ((nxt (next-char))
(dig (|rdigit?| nxt)))
(when dig
(unless (< dig r)
(spad_syntax_error))
(advance-char)
(go lp))))
(parse-integer buf :start mark :radix r)))
(defun is-radix-char (c)
(or (eql c #\r)
(eql c #\R)))
;; Parse an integer token, written either implicitly in decimal form,
;; or explicitly specified radix.
(defun get-spad-integer-token (token)
(let* ((buf (make-adjustable-string 0))
(val (get-decimal-number-token buf)))
(advance-char)
(when (is-radix-char (current-char))
(setq val (get-integer-in-radix buf val))
(advance-char))
(token-install val 'number token (size buf))))
; **** 4. BOOT token parsing actions
(defun TRANSLABEL (X AL) (TRANSLABEL1 X AL) X)
(defun TRANSLABEL1 (X AL)
"Transforms X according to AL = ((<label> . Sexpr) ..)."
(COND ((simple-vector-p X)
(do ((i 0 (1+ i))
(k (maxindex x)))
((> i k))
(if (LET ((Y (LASSOC (ELT X I) AL))) (SETF (ELT X I) Y))
(TRANSLABEL1 (ELT X I) AL))))
((ATOM X) NIL)
((LET ((Y (LASSOC (FIRST X) AL)))
(if Y (setf (FIRST X) Y) (TRANSLABEL1 (CDR X) AL))))
((TRANSLABEL1 (FIRST X) AL) (TRANSLABEL1 (CDR X) AL))))
; **** 5. BOOT Error Handling
(defun SPAD_SYNTAX_ERROR (&rest byebye)
"Print syntax error indication, underline character, scrub line."
(BUMPERRORCOUNT '|syntax|)
(COND ((AND (EQ DEBUGMODE 'YES) (NOT(CONSOLEINPUTP IN-STREAM)))
(SPAD_LONG_ERROR))
((SPAD_SHORT_ERROR)))
(IOClear)
(throw 'spad_reader nil))
(defun SPAD_LONG_ERROR ()
(SPAD_ERROR_LOC SPADERRORSTREAM)
(iostat)
(unless (EQUAL OUT-STREAM SPADERRORSTREAM)
(SPAD_ERROR_LOC OUT-STREAM)
(TERPRI OUT-STREAM)))
(defun SPAD_SHORT_ERROR () (current-line-show))
(defun SPAD_ERROR_LOC (STR)
(format str "******** Spad Syntax Error detected ********"))
|