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Convert functions to macros

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This commit is contained in:
Justin Ethier 2020-04-28 15:56:32 -04:00
parent 739486b9e3
commit c747e8c8e1
1 changed files with 47 additions and 44 deletions
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47
test-foreign.scm
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@ -2,7 +2,6 @@
(scheme base)
(scheme write)
(cyclone test)
(scheme cyclone cgen)
(scheme cyclone util)
(scheme cyclone pretty-print))
@ -16,14 +15,6 @@
(cdr expr))
`(Cyc-foreign-code ,@(cdr expr)))))
;(pretty-print (
(define-syntax define-foreign-lambda
(er-macro-transformer
(lambda (expr rename compare)
;; Temporary definition, this does not stay here!
;; TODO: extract these out, probably into cgen!
;; Unbox scheme object
;;
;; scm->c :: string -> symbol -> string
@ -33,16 +24,21 @@
;; - type - Data type of the Scheme object
;; Returns:
;; - C code used to unbox the data
(define (scm->c code type)
(case type
;(define (scm->c code type)
(define-syntax scm->c
(er-macro-transformer
(lambda (expr rename compare)
(let ((code (cadr expr))
(type (caddr expr)))
`(case ,type
((int integer)
(string-append "obj_obj2int(" code ")"))
(string-append "obj_obj2int(" ,code ")"))
((bool)
(string-append "(" code " == boolean_f)"))
(string-append "(" ,code " == boolean_f)"))
((string)
(string-append "string_str(" code ")"))
(string-append "string_str(" ,code ")"))
(else
(error "scm->c unable to convert scheme object of type " type))))
(error "scm->c unable to convert scheme object of type " ,type)))))))
;; Box C object, basically the meat of (foreign-value)
;;
@ -54,32 +50,39 @@
;; Returns:
;; - Allocation code?
;; - C code
(define (c->scm code type)
(case type
(define-syntax c->scm
(er-macro-transformer
(lambda (expr rename compare)
(let ((code (cadr expr))
(type (caddr expr)))
`(case ,type
((int integer)
(cons
""
(string-append "obj_int2obj(" code ")")))
(string-append "obj_int2obj(" ,code ")")))
((float double)
(let ((var (mangle (gensym 'var))))
(cons
(string-append
"make_double(" var ", " code ");")
"make_double(" var ", " ,code ");")
(string-append "&" var)
)))
((bool)
(cons
""
(string-append "(" code " == 0 ? boolean_f : boolean_t)")))
(string-append "(" ,code " == 0 ? boolean_f : boolean_t)")))
; ((string)
; TODO: how to handle the allocation here?
; may need to return a c-code pair???
; (string-append "
; ))
(else
(error "c->scm unable to convert C object of type " type))))
(error "c->scm unable to convert C object of type " ,type)))))))
;(pretty-print (
(define-syntax define-foreign-lambda
(er-macro-transformer
(lambda (expr rename compare)
(let* ((scm-fnc (cadr expr))
(c-fnc (cadddr expr))
(rv-type (caddr expr))