From 5100d4eecb05491e10eb411c164e5d27841213ed Mon Sep 17 00:00:00 2001
From: akr <akr>
Date: Thu, 27 Aug 1998 16:36:24 +0000
Subject: [PATCH] * ew-dec.el (ew-decode-field-test): Support
 `ew-permit-null-encoded-text'.

* ew-unit.el (ew-decode-eword): Check
`ew-permit-null-encoded-text'.

* ew-var.el (ew-encoded-text-regexp): Always permit null string
regardless of `ew-permit-null-encoded-text'.
---
 ChangeLog  |   11 +++++++++++
 ew-dec.el  |    2 ++
 ew-unit.el |   17 ++++++++++-------
 ew-var.el  |    7 ++-----
 4 files changed, 25 insertions(+), 12 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 2fc87e5..aa41a90 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,16 @@
 1998-08-27  Tanaka Akira      <akr@jaist.ac.jp>
 
+	* ew-dec.el (ew-decode-field-test): Support
+	`ew-permit-null-encoded-text'.
+
+	* ew-unit.el (ew-decode-eword): Check
+	`ew-permit-null-encoded-text'.
+
+	* ew-var.el (ew-encoded-text-regexp): Always permit null string
+	regardless of `ew-permit-null-encoded-text'.
+
+1998-08-27  Tanaka Akira      <akr@jaist.ac.jp>
+
 	* ew-var.el (ew-decode-field-syntax-alist): Add few fields.
 
 	* eword-decode.el (eword-decode-header): Compare decoded result
diff --git a/ew-dec.el b/ew-dec.el
index 4c2675c..759c7d8 100644
--- a/ew-dec.el
+++ b/ew-dec.el
@@ -490,11 +490,13 @@ each line is separated by CRLF."
 	    (ew-ignore-76bytes-limit nil)
 	    (ew-permit-sticked-comment nil)
 	    (ew-permit-sticked-special nil)
+	    (ew-permit-null-encoded-text nil)
 	    (options
 	     '(ew-ignore-76bytes-limit
 	       ew-ignore-75bytes-limit
 	       ew-permit-sticked-special
 	       ew-permit-sticked-comment
+	       ew-permit-null-encoded-text
 	       ew-decode-sticked-encoded-word
 	       ew-decode-quoted-encoded-word
 	       ))
diff --git a/ew-unit.el b/ew-unit.el
index 569c1ac..e780853 100644
--- a/ew-unit.el
+++ b/ew-unit.el
@@ -25,13 +25,16 @@
 	    bdec cdec
 	    bcheck
 	    tmp)
-	(if (and (setq bdec (ew-byte-decoder encoding))
-		 (setq cdec (ew-char-decoder charset)))
-	    (if (or (null (setq bcheck (ew-byte-checker encoding)))
-		    (funcall bcheck encoding encoded-text))
-		(ew-quote (closure-call cdec (funcall bdec encoded-text)))
-	      (ew-quote str))
-	  (ew-quote-eword charset encoding encoded-text)))
+	(if (or ew-permit-null-encoded-text
+		(< 0 (length encoded-text)))
+	    (if (and (setq bdec (ew-byte-decoder encoding))
+		     (setq cdec (ew-char-decoder charset)))
+		(if (or (null (setq bcheck (ew-byte-checker encoding)))
+			(funcall bcheck encoding encoded-text))
+		    (ew-quote (closure-call cdec (funcall bdec encoded-text)))
+		  (ew-quote str))
+	      (ew-quote-eword charset encoding encoded-text))
+	  (ew-quote str)))
     (ew-quote str)))
 
 (defun ew-byte-decoder (encoding)
diff --git a/ew-var.el b/ew-var.el
index 9a3e485..2463626 100644
--- a/ew-var.el
+++ b/ew-var.el
@@ -8,7 +8,7 @@
 (defvar ew-ignore-76bytes-limit nil)
 (defvar ew-permit-sticked-comment nil)
 (defvar ew-permit-sticked-special nil)
-(defvar ew-permit-null-encoded-text nil) ; affect when loading time.
+(defvar ew-permit-null-encoded-text nil)
 
 (defvar ew-remove-bare-crlf nil)
 (defvar ew-default-mime-charset 'x-ctext)
@@ -123,10 +123,7 @@
 ;;; constants.
 
 (defconst ew-token-regexp "[-!#-'*+0-9A-Z^-~]+")
-(defconst ew-encoded-text-regexp
-  (if ew-permit-null-encoded-text
-      "[!->@-~]*"
-    "[!->@-~]+"))
+(defconst ew-encoded-text-regexp "[!->@-~]*")
 
 (defconst ew-encoded-word-regexp
   (concat (regexp-quote "=?")
-- 
1.7.10.4