1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
|
;; 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: Pre-Parsing Code
;; PURPOSE: BOOT lines are massaged by preparse to make them easier to parse:
;; 1. Trailing -- comments are removed (this is already done, actually).
;; 2. Comments between { and } are removed.
;; 3. BOOT code is column-sensitive. Code which lines up columnarly is
;; parenthesized and semicolonized accordingly. For example,
;;
;; a
;; b
;; c
;; d
;; e
;;
;; becomes
;;
;; a
;; (b;
;; c
;; d)
;; e
;;
;; Note that to do this correctly, we also need to keep track of
;; parentheses already in the code.
(IMPORT-MODULE "lexing")
(in-package "BOOT")
; Global storage
(defparameter $INDEX 0 "File line number of most recently read line.")
(defparameter |$preparseLastLine| () "Most recently read line.")
(defparameter |$preparseReportIfTrue| NIL "Should we print listings?")
(defparameter |$LineList| nil "Stack of preparsed lines.")
(defparameter |$EchoLineStack| nil "Stack of lines to list.")
(defparameter $IOIndex 0 "Number of latest terminal input line.")
(DEFPARAMETER TOK NIL)
(DEFPARAMETER DEFINITION_NAME NIL)
(defun Initialize-Preparse (rd)
(setq $INDEX 0 |$LineList| nil |$EchoLineStack| nil)
(setq |$preparseLastLine| (|readLine| (|readerInput| rd))))
(defvar $skipme)
(defun |preparse1| (rd)
(PROG ((|$LineList| (|readerLines| rd)) |$EchoLineStack| NUM A I L PSLOC
INSTRING PCOUNT COMSYM STRSYM OPARSYM CPARSYM N NCOMSYM
(SLOC -1) (CONTINUE NIL) (PARENLEV 0) (NCOMBLOCK ())
(LINES ()) (LOCS ()) (NUMS ()) functor )
READLOOP (DCQ (NUM . A) (|preparseReadLine| rd))
(cond ((|atEndOfUnit?| A)
(|preparseEcho| (|readerLines| rd))
(COND ((NULL LINES) (RETURN NIL))
(NCOMBLOCK
(|findCommentBlock| NIL NUMS LOCS NCOMBLOCK NIL)))
(RETURN (|pairList| (|reverse!| NUMS)
(|parsePiles| (|reverse!| LOCS) (|reverse!| LINES))))))
(cond ((and (NULL LINES) (> (LENGTH A) 0) (EQ (CHAR A 0) #\) ))
; this is a command line, don't parse it
(|preparseEcho| (|readerLines| rd))
(setq |$preparseLastLine| nil) ;don't reread this line
(SETQ LINE a)
(CATCH 'SPAD_READER (|doSystemCommand| (subseq LINE 1)))
(GO READLOOP)))
(setq L (LENGTH A))
(if (EQ L 0)
(GO READLOOP))
(setq PSLOC SLOC)
(setq I 0
INSTRING ()
PCOUNT 0)
STRLOOP (setq STRSYM (OR (|findChar| #\" A I) L))
(setq COMSYM (OR (|findString| "--" A I) L))
(setq NCOMSYM (OR (|findString| "++" A I) L))
(setq OPARSYM (OR (|findChar| #\( A I) L))
(setq CPARSYM (OR (|findChar| #\) A I) L))
(setq N (MIN STRSYM COMSYM NCOMSYM OPARSYM CPARSYM))
(cond ((= N L)
(GO NOCOMS))
((|escaped?| A N))
((= N STRSYM) (setq INSTRING (NOT INSTRING)))
(INSTRING)
((= N COMSYM)
(setq A (subseq A 0 N))
(GO NOCOMS)) ; discard trailing comment
((= N NCOMSYM)
(setq SLOC (|indentationLocation| A))
(COND
((= SLOC N)
(COND ((AND NCOMBLOCK (NOT (= N (CAR NCOMBLOCK))))
(|findCommentBlock| NUM NUMS LOCS NCOMBLOCK (|readerLines| rd))
(SETQ NCOMBLOCK NIL)))
(SETQ NCOMBLOCK (CONS N (CONS A (IFCDR NCOMBLOCK))))
(SETQ A ""))
('T (PUSH (STRCONC (|makeString| N #\Space)
(SUBSTRING A N ())) |$LineList|)
(SETQ $INDEX (1- $INDEX))
(SETQ A (SUBSEQ A 0 N))))
(GO NOCOMS))
((= N OPARSYM) (setq PCOUNT (1+ PCOUNT)))
((= N CPARSYM) (setq PCOUNT (1- PCOUNT))))
(setq I (1+ N))
(GO STRLOOP)
NOCOMS (setq SLOC (|indentationLocation| A))
(setq A (|trimTrailingBlank| A))
(cond ((NULL SLOC)
(setq SLOC PSLOC)
(GO READLOOP)))
(cond ((EQ (ELT A (|maxIndex| A)) #\_)
(setq CONTINUE T a (subseq A (|maxIndex| A))))
((setq CONTINUE NIL)))
(if (and (null LINES) (= SLOC 0)) ;;test for skipping constructors
(if (and |$byConstructors|
(null (|findString| "==>" a))
(not (member (setq functor (intern
(substring a 0 (STRPOSL ": (=" A 0 NIL))))
|$byConstructors|)))
(setq $skipme 't)
(progn (push functor |$constructorsSeen|)
(setq $skipme nil))))
(when (and LINES (EQL SLOC 0))
(IF (AND NCOMBLOCK (NOT (ZEROP (CAR NCOMBLOCK))))
(|findCommentBlock| NUM NUMS LOCS NCOMBLOCK (|readerLines| rd)))
(IF (NOT (|ioTerminal?| (|readerInput| rd)))
(setq |$preparseLastLine|
(|reverse!| |$EchoLineStack|)))
(RETURN (|pairList| (|reverse!| NUMS)
(|parsePiles| (|reverse!| LOCS) (|reverse!| LINES)))))
(cond ((> PARENLEV 0)
(PUSH NIL LOCS)
(setq SLOC PSLOC)
(GO REREAD)))
(COND (NCOMBLOCK
(|findCommentBlock| NUM NUMS LOCS NCOMBLOCK (|readerLines| rd))
(setq NCOMBLOCK ())))
(PUSH SLOC LOCS)
REREAD (|preparseEcho| (|readerLines| rd))
(PUSH A LINES)
(PUSH NUM NUMS)
(setq PARENLEV (+ PARENLEV PCOUNT))
(when (and (|ioTerminal?| (|readerInput| rd)) (not continue))
(setq |$preparseLastLine| nil)
(RETURN (|pairList| (|reverse!| NUMS)
(|parsePiles| (|reverse!| LOCS) (|reverse!| LINES)))))
(GO READLOOP)))
|
