From 6d3226c4e76d8360d1e94917f9f0d208a09011d0 Mon Sep 17 00:00:00 2001
From: Roland Illig <roland.illig@gmx.de>
Date: Mon, 18 Jul 2005 09:31:37 +0000
Subject: [PATCH] 	* util.c: Added ascii_alpha_to_cntrl(), which converts
 'x' to 	^X. Useful for entering control characters literally. 	*
 util.h: Likewise. 	* widget.c: Use that function after C-q.

---
 src/ChangeLog |  7 +++++++
 src/util.c    | 15 +++++++++++++++
 src/util.h    |  4 ++++
 src/widget.c  |  2 +-
 4 files changed, 27 insertions(+), 1 deletion(-)

diff --git a/src/ChangeLog b/src/ChangeLog
index 6d882e0fd..169d197f2 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,10 @@
+2005-07-17  Roland Illig  <roland.illig@gmx.de>
+
+	* util.c: Added ascii_alpha_to_cntrl(), which converts 'x' to
+	^X. Useful for entering control characters literally.
+	* util.h: Likewise.
+	* widget.c: Use that function after C-q.
+
 2005-07-17  Roland Illig  <roland.illig@gmx.de>
 
 	* view.c: The viewer can remember the last file position and
diff --git a/src/util.c b/src/util.c
index 48aee1349..f3865da73 100644
--- a/src/util.c
+++ b/src/util.c
@@ -1449,3 +1449,18 @@ str_unconst (const char *s)
 {
 	return (char *) s;
 }
+
+#define ASCII_A		(0x40 + 1)
+#define ASCII_Z		(0x40 + 26)
+#define ASCII_a		(0x60 + 1)
+#define ASCII_z		(0x60 + 26)
+
+extern int
+ascii_alpha_to_cntrl (int ch)
+{
+    if ((ch >= ASCII_A && ch <= ASCII_Z)
+        || (ch >= ASCII_a && ch <= ASCII_z)) {
+	ch &= 0x1f;
+    }
+    return ch;
+}
diff --git a/src/util.h b/src/util.h
index 9c66c7052..eddbb5711 100644
--- a/src/util.h
+++ b/src/util.h
@@ -255,4 +255,8 @@ void save_file_position (const char *filename, long line, long column);
 /* usage: str_cmp ("foo", !=, "bar") */
 #define str_cmp(a,rel,b) (strcmp ((a), (b)) rel 0)
 
+/* if ch is in [A-Za-z], returns the corresponding control character,
+ * else returns the argument. */
+extern int ascii_alpha_to_cntrl (int ch);
+
 #endif
diff --git a/src/widget.c b/src/widget.c
index 299971a98..880164a9c 100644
--- a/src/widget.c
+++ b/src/widget.c
@@ -1586,7 +1586,7 @@ input_callback (Widget *w, widget_msg_t msg, int parm)
     case WIDGET_KEY:
 	if (parm == XCTRL ('q')) {
 	    quote = 1;
-	    v = handle_char (in, mi_getch ());
+	    v = handle_char (in, ascii_alpha_to_cntrl (mi_getch ()));
 	    quote = 0;
 	    return v;
 	}