24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
..
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
...
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
...
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
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
|
(import (chicken process-context))
(import (chicken condition))
(import (chicken pretty-print))
(import (chicken io))
(include "../scmlib/lisp-macro.scm")
(: *code-depth* integer)
(define *code-depth* 0) ; im sry
(: indent (string -> string))
(define (indent str)
(define (iterate n)
(if (eq? n 0) str
(string-append "\t" (iterate (- n 1)))))
(iterate *code-depth*))
(define (first fst . lst) fst)
(: string-reduce (list --> string))
(: words->string (list --> string))
(: separate (string list --> string))
(define (string-reduce lst) (foldl string-append "" lst))
(define (words->string lst) (foldl (lambda (a b) (string-append a " " b)) "" lst))
................................................................................
(else (abort '(exn syntax declare)))))
(define (c-define body)
(cond
((and (list? (car body)) (>= (length body) 2))
(let ([contents (words->string (map (lambda(x) (eval-code #f x)) (cdr body)))])
(string-append (c-declare (car body))
(if (>= (length (car body)) 3) (string-append " {\n" contents "\n}")
(string-append " = " contents)))))
(else (abort '(exn syntax define)))))
(: c-call-function (list -> string))
(define (c-call-function body)
(unless (> (length body) 0) (abort '(exn parse call)))
(string-append
(eval-code #t (car body)) "(" (separate "," (map (lambda(x) (eval-code #t x)) (cdr body))) ")"))
(define (c-cpp-include body)
(case (length body)
((1) (if (string? (car body)) (string-append "#include \"" (car body) "\"\n")
(abort '(exn syntax include))))
((2) (if (and (eqv? (car body) 'sys)
(string? (cadr body))) (string-append "#include <" (cadr body) ">\n")
................................................................................
((and (list? a) (= (length a) 2)) ((eval-type (cadr a)) (car a)))
((list? a) ((eval-type a)""))
(else (abort '(exn syntax function-declare argument)))))
(let ([arg-str (separate ", " (map parse-arg args))]
[ret-fn (eval-type ret)])
(ret-fn (string-append (ensure-string name) "(" arg-str ")"))))
(define-macro (with-deeper-context . body)
`(begin
(set! *code-depth* (+ 1 *code-depth*))
(first
,@body
(set! *code-depth* (- *code-depth* 1))
)))
(: c-statement (string -> string))
(define (c-statement s) (indent (with-deeper-context (string-append s ";\n"))))
(: eval-type ((or null symbol list) -> ((or symbol string) -> string)))
(define (eval-type t)
; a type object is a function that is called with a name to
; generate a definition. this is necessary for the case of
; arrays and function pointers, which require special syntax
(: simple ((or string symbol) --> string))
................................................................................
('uint (simple "unsigned int"))
('ulong (simple "unsigned long"))
('ullong (simple "unsigned long long"))
('llong (simple "long long"))
('ldouble (simple "long double"))
('u128 (simple "unsigned __int128_t"))
('s128 (simple "__int128_t"))
(else (simple (symbol->string t)))))
((list? t) (parse-type t))
((string? t) (simple t))
(else (abort '(exn syntax)))))
(define (c-construct type name body)
(string-append type " " name " {\n"
(string-reduce (map (lambda(x) (indent (eval-code #f x))) body))
"\n}"))
(define (c-fn-return body)
(string-append "return " (string-reduce (map (lambda(x) (eval-code #t x)) body))))
(define (c-math-op op body)
(unless (= 2 (length body)) (abort '(exn syntax math)))
(string-append "((" (eval-code #t (car body)) ")" op "(" (eval-code #t (cadr body)) "))"))
(define (inter s x) (print* "-- " s ": ") (pretty-print x) x)
(: eval-code (boolean list -> string))
(define (eval-code inexpr data)
(define (ctx x) inexpr (if (eq? inexpr #t) x (c-statement x)))
(define (deepen n) (set! *code-depth* (+ *code-depth* n)))
(: dispatch (list -> string))
(define (dispatch form body)
(case form
('* (eval-code inexpr (evaluate-list body)))
('= (eval-code inexpr (evaluate-list (cons 'begin body))))
('@ (eval (cons 'begin body)) "")
('use (c-cpp-include body))
('def (first (c-statement (with-deeper-context (c-define body))) ))
('decl (first (c-statement (with-deeper-context (c-declare body))) ))
('call (ctx (c-call-function body)))
('list (first (string-append "{" (separate "," (map (lambda(x) (eval-code #t x)) body)) "}") ))
('struct (first (ctx (c-construct "struct" (car form) (cdr form))) ))
('enum (first (ctx (c-construct "enum" (car form) (cdr form))) ))
('ret (c-statement (c-fn-return body)))
('add (c-math-op "+" body))
('add-> (ctx (c-math-op "+=" body)))
('sub (c-math-op "-" body))
('sub-> (ctx (c-math-op "-=" body)))
('mul (c-math-op "*" body))
('mul-> (ctx (c-math-op "*=" body)))
('div (c-math-op "/" body))
('div-> (ctx (c-math-op "/=" body)))
('== (c-math-op "==" body))
('-> (ctx (c-math-op "=" body)))
('→ (ctx (c-math-op "=" body)))
('; ";")
(else (string-append "<UNFOUND FORM " (symbol->string form) ">"))
)))
(cond
((null? data) "")
((symbol? data) (symbol->string data))
((string? data) (string-append "\"" data "\""))
|
<
<
<
<
<
<
<
<
<
|
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
<
<
<
<
<
<
<
<
|
>
|
|
|
|
|
>
>
>
>
>
>
>
>
|
<
|
|
>
>
>
|
|
|
|
|
|
|
|
>
|
>
>
>
>
>
|
|
|
24
25
26
27
28
29
30
31
32
33
34
35
36
37
..
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
...
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
...
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
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
|
(import (chicken process-context))
(import (chicken condition))
(import (chicken pretty-print))
(import (chicken io))
(include "../scmlib/lisp-macro.scm")
(define (first fst . lst) fst)
(: string-reduce (list --> string))
(: words->string (list --> string))
(: separate (string list --> string))
(define (string-reduce lst) (foldl string-append "" lst))
(define (words->string lst) (foldl (lambda (a b) (string-append a " " b)) "" lst))
................................................................................
(else (abort '(exn syntax declare)))))
(define (c-define body)
(cond
((and (list? (car body)) (>= (length body) 2))
(let ([contents (words->string (map (lambda(x) (eval-code #f x)) (cdr body)))])
(string-append (c-declare (car body))
(if (>= (length (car body)) 3) (string-append " {" contents "}")
(string-append " = " contents)))))
(else (abort '(exn syntax define)))))
(: c-call-function (list -> string))
(define (c-call-function body)
(unless (> (length body) 0) (abort '(exn parse call)))
(string-append
(eval-code #t (car body)) "(" (separate "," (map (lambda(x) (eval-code #t x)) (cdr body))) ")"))
(: c-array-index (list -> string))
(define (c-array-index body)
(unless (= (length body) 2) (abort '(exn parse call)))
(string-append
(eval-code #t (car body))
"[" (eval-code #t (cadr body)) "]"))
(: c-conditional (list -> string))
(define (c-conditional body)
(unless (> (length body) 0) (abort '(exn parse cond)))
(define (mk-block acc code)
(string-append
(if (eq? 'else (car code)) (string-append acc "else {")
(string-append acc
(if (equal? acc "") "if (" " else if (")
(eval-code #t (car code)) ") {"))
(string-reduce (map (lambda(x)(eval-code #f x)) (cdr code)))
"}"
))
(foldl mk-block "" body))
(define (c-cpp-include body)
(case (length body)
((1) (if (string? (car body)) (string-append "#include \"" (car body) "\"\n")
(abort '(exn syntax include))))
((2) (if (and (eqv? (car body) 'sys)
(string? (cadr body))) (string-append "#include <" (cadr body) ">\n")
................................................................................
((and (list? a) (= (length a) 2)) ((eval-type (cadr a)) (car a)))
((list? a) ((eval-type a)""))
(else (abort '(exn syntax function-declare argument)))))
(let ([arg-str (separate ", " (map parse-arg args))]
[ret-fn (eval-type ret)])
(ret-fn (string-append (ensure-string name) "(" arg-str ")"))))
(: c-statement (string -> string))
(define (c-statement s) (string-append s ";"))
(: eval-type ((or null symbol list) -> ((or symbol string) -> string)))
(define (eval-type t)
; a type object is a function that is called with a name to
; generate a definition. this is necessary for the case of
; arrays and function pointers, which require special syntax
(: simple ((or string symbol) --> string))
................................................................................
('uint (simple "unsigned int"))
('ulong (simple "unsigned long"))
('ullong (simple "unsigned long long"))
('llong (simple "long long"))
('ldouble (simple "long double"))
('u128 (simple "unsigned __int128_t"))
('s128 (simple "__int128_t"))
('ptr (simple "void*"))
(else (simple (symbol->string t)))))
((list? t) (parse-type t))
((string? t) (simple t))
(else (abort '(exn syntax)))))
(define (c-construct type name body)
(string-append type " " name " {"
(string-reduce (map (lambda(x) (eval-code #f x)) body))
"}"))
(define (c-fn-return body)
(string-append "return " (string-reduce (map (lambda(x) (eval-code #t x)) body))))
(define (c-binary-op op body)
(unless (= 2 (length body)) (abort '(exn syntax binary-op)))
(string-append "((" (eval-code #t (car body)) ")" op "(" (eval-code #t (cadr body)) "))"))
(define (c-unary-op op body)
(unless (= 1 (length body)) (abort '(exn syntax unary-op)))
(string-append "(" op "(" (eval-code #t (car body)) "))"))
(define (c-typecast body)
(unless (= 2 (length body)) (abort '(exn syntax binary-op)))
(string-append "((" ((eval-type (car body))"") ")" (eval-code #t (cadr body)) ")"))
(define (wiretap s x) (print* "-- " s ": ") (pretty-print x) x)
(: eval-code (boolean list -> string))
(define (eval-code inexpr data)
(define (ctx x) inexpr (if (eq? inexpr #t) x (c-statement x)))
(: dispatch (list -> string))
(define (dispatch form body)
(case form
('* (eval-code inexpr (evaluate-list body)))
('= (eval-code inexpr (evaluate-list (cons 'begin body))))
('@ (eval (cons 'begin body)) "")
('use (c-cpp-include body))
('def (first (c-statement (c-define body))) )
('decl (first (c-statement (c-declare body)) ))
('call (ctx (c-call-function body)))
('cond (c-statement (c-conditional body)))
('list (first (string-append "{" (separate "," (map (lambda(x) (eval-code #t x)) body)) "}") ))
('struct (first (ctx (c-construct "struct" (car form) (cdr form))) ))
('enum (first (ctx (c-construct "enum" (car form) (cdr form))) ))
('ret (c-statement (c-fn-return body)))
('cast (c-typecast body))
('idx (c-array-index body))
('add (c-binary-op "+" body))
('add-> (ctx (c-binary-op "+=" body)))
('sub (c-binary-op "-" body))
('sub-> (ctx (c-binary-op "-=" body)))
('mul (c-binary-op "*" body))
('mul-> (ctx (c-binary-op "*=" body)))
('div (c-binary-op "/" body))
('div-> (ctx (c-binary-op "/=" body)))
('ref (c-unary-op "&" body))
('eq (c-binary-op "==" body))
('neq (c-binary-op "!=" body))
('gte (c-binary-op ">=" body))
('lte (c-binary-op "<=" body))
('lt (c-binary-op "<" body))
('gt (c-binary-op ">" body))
('-> (ctx (c-binary-op "=" body)))
('→ (ctx (c-binary-op "=" body)))
('; ";")
(else (string-append "<UNFOUND FORM " (symbol->string form) ">"))
)))
(cond
((null? data) "")
((symbol? data) (symbol->string data))
((string? data) (string-append "\"" data "\""))
|