increase console line limit to 4095 bytes

git-svn-id: https://svn.r-project.org/R/trunk@45684 00db46b3-68df-0310-9c12-caf00c1e9a41

NEWS

@@ -49,7 +49,7 @@ NEW FEATURES
 	accept that are now rare.
 
     o	The behaviour of readLines() for incomplete final lines on
-    	non-text-mode connections has been changed to be like blocking
+    	binary-mode connections has been changed to be like blocking
     	rather than non-blocking text-mode connections.
 
     o	?pkg::topic and ?pkg:::topic now find help on 'topic' from
@@ -174,6 +174,13 @@ UTILITIES
 	available, else by name.
 
 
+C-LEVEL FACILITIES
+
+    o	R_ReadConsole will now be called with a buffer size of 4096
+	bytes, (rather than 1024): maintainers of alternative
+	front-ends should check that they do not have a smaller limit.
+
+
 BUG FIXES
 
     o	@ now gives an error (and not just a warning) if it is being

doc/manual/R-intro.texi

@@ -487,7 +487,7 @@ and indicate continuation by simple indenting.
 Command lines entered at the console are limited@footnote{some of the
 consoles will not allow you to enter more, and amongst those which do
 some will silently discard the excess and some will use it as the start
-of the next line.} to about 1024 bytes (not characters).
+of the next line.} to about 4095 bytes (not characters).
 
 @node Recall and correction of previous commands, Executing commands from or diverting output to a file, R commands; case sensitivity etc, Introduction and preliminaries
 @section Recall and correction of previous commands

src/include/Defn.h

@@ -894,8 +894,9 @@ extern0 Rboolean known_to_be_utf8 INI_as(FALSE);
 #define	R_FILE		2
 #define R_TEXT		3
 
-/* The maximum length of input line which will be asked for */
-#define CONSOLE_BUFFER_SIZE 1024
+/* The maximum length of input line which will be asked for,
+   in bytes, including the terminator */
+#define CONSOLE_BUFFER_SIZE 4096
 int	R_ReadConsole(const char *, unsigned char *, int, int);
 void	R_WriteConsole(const char *, int); /* equivalent to R_WriteConsoleEx(a, b, 0) */
 void	R_WriteConsoleEx(const char *, int, int);