From 7b5649097f182a1f5f6270cb3d6719d13aa3f34f Mon Sep 17 00:00:00 2001
From: axel <axel@liljencrantz.se>
Date: Mon, 20 Nov 2006 12:19:34 +1000
Subject: [PATCH] Correctly handle multiple backslashes at end of line w.r.t.
 multiline handling

darcs-hash:20061120021934-ac50b-20d953c16711a4959cac9d435217309fc78aab98.gz
---
 reader.c | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/reader.c b/reader.c
index c9663f156..2a2b7cf59 100644
--- a/reader.c
+++ b/reader.c
@@ -1985,6 +1985,27 @@ static int wchar_private( wchar_t c )
 	return ( (c >= 0xe000) && (c <= 0xf8ff ) );
 }
 
+/**
+   Test if the specified character in the specified string is
+   backslashed.
+*/
+static int is_backslashed( const wchar_t *str, int pos )
+{
+	int count = 0;
+	int i;
+	
+	for( i=pos-1; i>=0; i-- )
+	{
+		if( str[i] != L'\\' )
+			break;
+		
+		count++;
+	}
+
+	return count %2;
+}
+
+
 wchar_t *reader_readline()
 {
 
@@ -2366,7 +2387,7 @@ wchar_t *reader_readline()
 				/*
 				  Allow backslash-escaped newlines
 				*/
-				if( data->buff_pos && data->buff[data->buff_pos-1]==L'\\' )
+				if( is_backslashed( data->buff, data->buff_pos ) )
 				{
 					insert_char( '\n' );
 					break;