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Doing the right thing for value-result parameters.

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This commit is contained in:
Alex Shinn 2011-11-22 08:21:32 +09:00
parent bb53a03fb8
commit da2795cfa5
1 changed files with 42 additions and 38 deletions
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80
tools/chibi-ffi
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@ -704,6 +704,45 @@
(cat " sexp_check_block_port(ctx, arg" (type-index a) ", 0);\n")))
args))
(define (write-value func val)
(cond
((find (lambda (x)
(and (type-array x)
(type-auto-expand? x)
(eq? val (get-array-length func x))))
(func-c-args func))
=> (lambda (x) (cat "len" (type-index x))))
((assq val *types*)
(cat (or (type-struct-type val) "") " " val))
((list? val)
(write (car val))
(cat
"("
(lambda ()
(cond
((pair? (cdr val))
(write-value func (cadr val))
(for-each (lambda (x) (display ", ") (write-value func x)) (cddr val)))))
")"))
(else
(write val))))
(define (write-actual-parameter func arg)
(cond
((or (type-result? arg) (type-array arg))
(cat (if (or (type-free? arg) (type-reference? arg) (basic-type? arg))
"&"
"")
"tmp" (type-index arg)))
((and (not (type-default? arg)) (type-value arg))
=> (lambda (x) (write-value func x)))
((and (type-pointer? arg) (basic-type? arg))
(cat "&tmp" (type-index arg)))
(else
(scheme->c-converter
arg
(string-append "arg" (type-index-string arg))))))
(define (write-temporaries func)
(for-each
(lambda (a)
@ -746,6 +785,9 @@
(if (and (symbol? len) (not (eq? len 'null)))
(cat " tmp" (type-index a) "[" (lambda () (scheme->c-converter 'unsigned-int len))
"*sizeof(tmp" (type-index a) "[0])] = 0;\n")))))
((and (type-result? a) (type-value a))
(cat " tmp" (type-index a) " = "
(lambda () (write-value func (type-value a))) ";\n"))
((and (type-pointer? a) (basic-type? a))
(cat " tmp" (type-index a) " = "
(lambda ()
@ -755,44 +797,6 @@
";\n")))))
(func-c-args func)))
(define (write-actual-parameter func arg)
(define (write-value val)
(cond
((find (lambda (x)
(and (type-array x)
(type-auto-expand? x)
(eq? val (get-array-length func x))))
(func-c-args func))
=> (lambda (x) (cat "len" (type-index x))))
((assq val *types*)
(cat (or (type-struct-type val) "") " " val))
((list? val)
(write (car val))
(cat
"("
(lambda ()
(cond
((pair? (cdr val))
(write-value (cadr val))
(for-each (lambda (x) (display ", ") (write-value x)) (cddr val)))))
")"))
(else
(write val))))
(cond
((and (not (type-default? arg)) (type-value arg))
=> write-value)
((or (type-result? arg) (type-array arg))
(cat (if (or (type-free? arg) (type-reference? arg) (basic-type? arg))
"&"
"")
"tmp" (type-index arg)))
((and (type-pointer? arg) (basic-type? arg))
(cat "&tmp" (type-index arg)))
(else
(scheme->c-converter
arg
(string-append "arg" (type-index-string arg))))))
(define (write-call func)
(let ((ret-type (func-ret-type func))
(c-name (func-c-name func))