X-Git-Url: https://git.distorted.org.uk/~mdw/sod/blobdiff_plain/3dca7758421664a838c54b273bd9221f02072045..944bf9362ff51217b1617f85126d26e821b8aa91:/src/codegen-impl.lisp

diff --git a/src/codegen-impl.lisp b/src/codegen-impl.lisp
index 170f4a8..ccc66a1 100644
--- a/src/codegen-impl.lisp
+++ b/src/codegen-impl.lisp
@@ -7,7 +7,7 @@
 
 ;;;----- Licensing notice ---------------------------------------------------
 ;;;
-;;; This file is part of the Sensble Object Design, an object system for C.
+;;; This file is part of the Sensible Object Design, an object system for C.
 ;;;
 ;;; SOD is free software; you can redistribute it and/or modify
 ;;; it under the terms of the GNU General Public License as published by
@@ -37,6 +37,16 @@
   ((in-use-p :initarg :in-use-p :initform nil
 	     :type boolean :accessor var-in-use-p)))
 
+(define-module-var *temporary-index* 0
+  "Index for temporary name generation.
+
+   This is automatically reset to zero before the output functions are
+   invoked to write a file.  This way, we can ensure that the same output
+   file is always produced from the same input.")
+
+(define-clear-the-decks reset-codegen-index
+  (setf *temporary-index* 0))
+
 (defmethod commentify-argument-name ((name temporary-name))
   nil)
 
@@ -61,50 +71,6 @@
       (format-temporary-name var stream)))
 
 ;;;--------------------------------------------------------------------------
-;;; Instruction types.
-
-;; Compound statements.
-
-;; HACK: use gensyms for the `condition' slots to avoid leaking the slot
-;; names, since the symbol `condition' actually comes from the `common-lisp'
-;; package.  The `definst' machinery will symbolicate the various associated
-;; methods correctly despite this subterfuge.
-
-(definst if (stream :export t) (#1=#:condition consequent alternative)
-  (format-compound-statement (stream consequent alternative)
-    (format stream "if (~A)" #1#))
-  (when alternative
-    (format-compound-statement (stream alternative)
-      (write-string "else" stream))))
-
-(definst while (stream :export t) (#1=#:condition body)
-  (format-compound-statement (stream body)
-    (format stream "while (~A)" #1#)))
-
-(definst do-while (stream :export t) (body #1=#:condition)
-  (format-compound-statement (stream body :space)
-    (write-string "do" stream))
-  (format stream "while (~A);" #1#))
-
-;; Special varargs hacks.
-
-(definst va-start (stream :export t) (ap arg)
-  (format stream "va_start(~@<~A, ~_~A~:>);" ap arg))
-
-(definst va-copy (stream :export t) (to from)
-  (format stream "va_copy(~@<~A, ~_~A~:>);" to from))
-
-(definst va-end (stream :export t) (ap)
-  (format stream "va_end(~A);" ap))
-
-;; Expressions.
-
-;; HACK: use a gensym for the `func' slot to avoid leaking the slot name,
-;; since the symbol `func' is exported from our package.
-(definst call (stream :export t) (#1=#:func args)
-  (format stream "~A(~@<~{~A~^, ~_~}~:>)" #1# args))
-
-;;;--------------------------------------------------------------------------
 ;;; Code generator objects.
 
 (defclass basic-codegen ()
@@ -146,12 +112,12 @@
 	   (setf (codegen-vars codegen)
 		 (cons (make-var-inst name type init) vars)))
 	  ((not (c-type-equal-p type (inst-type var)))
-	   (error "(Internal) Redefining type for variable ~A." name)))
+	   (error "(Internal) Redefining type for variable ~A" name)))
     name))
 
 (export 'codegen)
 (defclass codegen (basic-codegen)
-  ((functions :initform nil :type list :accessor codegen-functions)
+  ((functions :initform nil :type list :reader codegen-functions)
    (stack :initform nil :type list :accessor codegen-stack))
   (:documentation
    "A full-fat code generator which can generate and track functions.
@@ -195,7 +161,7 @@
 				    :in-use-p t
 				    :tag (prog1 temp-index
 					   (incf temp-index)))))
-	  (push (make-var-inst name type nil) vars)
+	  (push (make-var-inst name type) vars)
 	  name))))
 
 ;;;----- That's all, folks --------------------------------------------------