aboutsummaryrefslogtreecommitdiff
path: root/src/interp/sys-utility.boot
blob: 82fb11e26ea0ebde9833bcf7d2c50cd82eb66eb5 (plain)
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
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
-- Copyright (C) 2007-2008 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.
--

-- This file defines some utility functions common to both the compiler
-- and interpreter.

import sys_-os
import vmlisp
namespace BOOT


--%

++ getVMType returns an approximation of the underlying object type
++ representation of a domain, as a Lisp type specifier as seen by
++ the runtime system.
getVMType d ==
  case (d' := devaluate d) of
    Void => "%Void"
    Boolean => "%Boolean"
    Byte => "%Byte"
    Character => "%Char"
    SingleInteger => "%Short"
    Integer => "%Integer"
    String => "%String"
    List => "%List"
    Vector => ["%Vector",getVMType second d']
    PrimitiveArray => ["%SimpleArray", getVMType second d']
    Pair => "%Pair"
    otherwise => "%Thing"                 -- good enough, for now.

--%

setDynamicBinding: (%Symbol,%Thing) -> %Thing
setDynamicBinding(s,v) ==
  SETF(SYMBOL_-VALUE s,v)

++ returns true if `f' is bound to a macro.
macrop: %Thing -> %Boolean
macrop f ==
  IDENTP f and not null MACRO_-FUNCTION f

++ returns true if `f' is bound to a function
functionp: %Thing -> %Boolean
functionp f ==
  IDENTP f => FBOUNDP f and null MACRO_-FUNCTION f
  FUNCTIONP f

++ remove `item' from `sequence'.
delete: (%Thing,%Sequence) -> %Sequence
delete(item,sequence) ==
  SYMBOLP item => 
    REMOVE(item,sequence,KEYWORD::TEST,function EQ)
  atom item and not ARRAYP item =>
    REMOVE(item,sequence)
  REMOVE(item,sequence,KEYWORD::TEST,function EQUALP)

++ returns true if `x' is contained in `y'.
CONTAINED: (%Thing,%Thing) -> %Boolean
CONTAINED(x,y) == main where
  main() ==
    SYMBOLP x => eq(x,y)
    equal(x,y)
  eq(x,y) ==
    atom y => EQ(x,y)
    eq(x, car y) or eq(x, cdr y)
  equal(x,y) ==
    atom y => EQUAL(x,y)
    equal(x, car y) or equal(x, cdr y)

++ Returns all the keys of association list `x'
-- ??? Should not this be named `alistAllKeys'?
ASSOCLEFT: %Thing -> %Thing
ASSOCLEFT x ==
  atom x => x
  MAPCAR(function first,x)

++ Returns all the datums of association list `x'.
-- ??? Should not this be named `alistAllValues'?
ASSOCRIGHT: %Thing -> %Thing
ASSOCRIGHT x ==
  atom x => x
  MAPCAR(function rest,x)

++ Put the association list pair `(x . y)' into `l', erasing any 
++ previous association for `x'.
ADDASSOC: (%Thing,%Thing,%List) -> %List
ADDASSOC(x,y,l) ==
  atom l => [[x,:y],:l]
  x = first first l => [[x,:y],:cdr l]
  [first l,:ADDASSOC(x,y,rest l)]


++ Remove any assocation pair `(u . x)' from list `v'.
DELLASOS: (%Thing,%List) -> %List
DELLASOS(u,v) ==
  atom v => nil
  u = first first v => rest v
  [first v,:DELLASOS(u,rest v)]


++ Return the datum associated with key `x' in association list `y'.
-- ??? Should not this be named `alistValue'?
LASSOC: (%Thing,%List) -> %Thing
LASSOC(x,y) ==
  atom y => nil
  x = first first y => rest first y
  LASSOC(x,rest y)

++ Return the key associated with datum `x' in association list `y'.
rassoc: (%Thing,%List) -> %Thing
rassoc(x,y) ==
  atom y => nil
  x = rest first y => first first y
  rassoc(x,rest y)

++ Reclaim unreachable objects.
RECLAIM() ==
)if %hasFeature KEYWORD::GCL
  SI::GBC true
)elseif %hasFeature KEYWORD::SBCL
  SB_-EXT::GC()
)elseif %hasFeature KEYWORD::CLISP
  EXT::GC()
)else
  fatalError '"don't know how to collect"
)endif

++
makeAbsoluteFilename: %String -> %String
makeAbsoluteFilename name ==
  CONCATENATE("STRING",systemRootDirectory(),name)

++ returns true if `file' exists as a pathname.
existingFile? file ==
  PROBE_-FILE file

++ original version returned 0 on success, and 1 on failure
++ ??? fix that to return -1 on failure.
$ERASE(:filearg) ==
  -removeFile MAKE_-FULL_-NAMESTRING filearg

++
$REPLACE(filespec1,filespec2) ==
  $ERASE(filespec1 := MAKE_-FULL_-NAMESTRING filespec1)
  renameFile(MAKE_-FULL_-NAMESTRING filespec2, filespec1)

++
checkMkdir path ==
  mkdir path = 0 => true
  systemError ['"cannot create directory",:bright path]

++ return the pathname to the system module designated by `m'.
getSystemModulePath m ==
  CONCAT(systemRootDirectory(),'"algebra/",m,'".",$faslType)

++ load module in `path' that supposedly will define the function 
++ indicated by `name'.
loadModule: (%String,%Symbol) -> %Thing
loadModule(path,name) ==
  FMAKUNBOUND name
  LOAD path

--% numerics
log10 x ==
  LOG(x,10)

bitand: (%Short,%Short) -> %Short
bitand(x,y) ==
  BOOLE(BOOLE_-AND,x,y)

bitior: (%Short,%Short) -> %Short
bitior(x,y) ==
  BOOLE(BOOLE_-IOR,x,y)


--% Back ends 

++ compile a function definition, augmenting the current
++ evaluation environement with the result of the compilation.
COMPILE_-DEFUN(name,body) ==
  EVAL body
  COMPILE name

++ Augment the current evaluation environment with a function definition.
EVAL_-DEFUN(name,body) ==
  EVAL MACROEXPANDALL body

PRINT_-AND_-EVAL_-DEFUN(name,body) ==
  EVAL body
  PRINT_-DEFUN(name,body)