C-parser add strings.

1 files changed, 19 insertions, 0 deletions

diff --git a/module/c/parse.scm b/module/c/parse.scm
index d923e5b1..ad716132 100644
--- a/module/c/parse.scm
+++ b/module/c/parse.scm
@@ -3,6 +3,9 @@
   :use-module (srfi srfi-1)
   :use-module (srfi srfi-71)
   :use-module (ice-9 match)
+  :use-module ((rnrs io ports)
+               :select (string->bytevector make-transcoder utf-8-codec))
+  :use-module (rnrs bytevectors)
   :export (parse-lexeme-tree))
 
 ;;; Rename this
@@ -52,6 +55,14 @@
                                    (list else vars) #f)))
     vars)))
 
+;; Converts string to a null-terminated bytevector
+(define* (string->c-string str optional: (transcoder (make-transcoder (utf-8-codec))))
+  (let* ((bv* (string->bytevector str transcoder))
+         (bv (make-bytevector (1+ (bytevector-length bv*)))))
+    (bytevector-copy! bv* 0 bv 0 (bytevector-length bv*))
+    (bytevector-u8-set! bv (bytevector-length bv*) 0)
+    bv))
+
 (define (parse-lexeme-tree tree)
   (match tree
     ['() '()]
@@ -149,6 +160,14 @@
                ,(parse-lexeme-tree b)
                ,(parse-lexeme-tree c))]
 
+
+
+
+    ['string #vu8(0)]
+    [('string str) (string->c-string str)]
+    [(('string str) ...)
+     (string->c-string (string-concatenate str))]
+
     [('infix args ...)
      (let ((r (resolve-order-of-operations
                (flatten-infix (cons 'infix args)))))