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;; Copyright (c) 1991-2002, The Numerical Algorithms Group Ltd.
;; All rights reserved.
;; Copyright (C) 2007-2012, 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")
; *** 1. BOOT file handling
(defun print-defun (name body)
(let* ((sp (assoc 'compiler-output-stream optionlist))
(st (if sp (cdr sp) |$OutputStream|)))
(if (and (|ioTerminal?| st) (symbolp name) (fboundp name)
(not (compiled-function-p (symbol-function name))))
(compile name))
(when (or |$PrettyPrint| (not (|ioTerminal?| st)))
(print-full body st) (force-output st))))
; *** 3. BOOT Token Handling ***
;; -*- 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 (|currentChar|) buf)
(let ((next-chr (|nextChar|)))
(cond ((digitp next-chr)
(|advanceChar!|)
(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 (|currentChar|) buf)
(let* ((nxt (|nextChar|))
(dig (|rdigit?| nxt)))
(when dig
(unless (< dig r)
(spad_syntax_error))
(|advanceChar!|)
(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)))
(|advanceChar!|)
(when (is-radix-char (|currentChar|))
(setq val (get-integer-in-radix buf val))
(|advanceChar!|))
(|tokenInstall| 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 ********"))
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