Submitted By: Matt Burgess (matthew at linuxfromscratch dot org)
Date: 2007-04-29
Initial Package Version: 5.2
Upstream Status: From Upstream
Origin: http://ftp.gnu.org/gnu/readline/readline-5.2-patches/
Description: A combined patch containing patches 001-004 from upstream.

diff -Naur readline-5.2.orig/display.c readline-5.2/display.c
--- readline-5.2.orig/display.c	2006-09-14 18:20:12.000000000 +0000
+++ readline-5.2/display.c	2007-04-28 19:17:04.000000000 +0000
@@ -561,6 +561,17 @@
       wrap_offset = prompt_invis_chars_first_line = 0;
     }
 
+#if defined (HANDLE_MULTIBYTE)
+#define CHECK_INV_LBREAKS() \
+      do { \
+	if (newlines >= (inv_lbsize - 2)) \
+	  { \
+	    inv_lbsize *= 2; \
+	    inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); \
+	    _rl_wrapped_line = (int *)xrealloc (_rl_wrapped_line, inv_lbsize * sizeof (int)); \
+	  } \
+      } while (0)
+#else
 #define CHECK_INV_LBREAKS() \
       do { \
 	if (newlines >= (inv_lbsize - 2)) \
@@ -569,6 +580,7 @@
 	    inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); \
 	  } \
       } while (0)
+#endif /* HANDLE_MULTIBYTE */
 
 #if defined (HANDLE_MULTIBYTE)	  
 #define CHECK_LPOS() \
@@ -1586,8 +1598,22 @@
 	  temp = nls - nfd;
 	  if (temp > 0)
 	    {
+	      /* If nfd begins at the prompt, or before the invisible
+		 characters in the prompt, we need to adjust _rl_last_c_pos
+		 in a multibyte locale to account for the wrap offset and
+		 set cpos_adjusted accordingly. */
 	      _rl_output_some_chars (nfd, temp);
-	      _rl_last_c_pos += _rl_col_width (nfd, 0, temp);;
+	      if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
+		{
+                  _rl_last_c_pos += _rl_col_width (nfd, 0, temp);
+                  if (current_line == 0 && wrap_offset &&  ((nfd - new) <= prompt_last_invisible))
+		    {
+		      _rl_last_c_pos -= wrap_offset;
+		      cpos_adjusted = 1;
+		    }
+		}
+              else
+                _rl_last_c_pos += temp;
 	    }
 	}
       /* Otherwise, print over the existing material. */
@@ -1595,8 +1621,20 @@
 	{
 	  if (temp > 0)
 	    {
+	      /* If nfd begins at the prompt, or before the invisible
+		 characters in the prompt, we need to adjust _rl_last_c_pos
+		 in a multibyte locale to account for the wrap offset and
+		 set cpos_adjusted accordingly. */
 	      _rl_output_some_chars (nfd, temp);
 	      _rl_last_c_pos += col_temp;		/* XXX */
+	      if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
+		{
+		  if (current_line == 0 && wrap_offset &&  ((nfd - new) <= prompt_last_invisible))
+		    {
+		      _rl_last_c_pos -= wrap_offset;
+		      cpos_adjusted = 1;
+		    }
+		}
 	    }
 	  lendiff = (oe - old) - (ne - new);
 	  if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
@@ -1732,7 +1770,10 @@
   if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
     {
       dpos = _rl_col_width (data, 0, new);
-      if (dpos > prompt_last_invisible)		/* XXX - don't use woff here */
+      /* Use NEW when comparing against the last invisible character in the
+	 prompt string, since they're both buffer indices and DPOS is a
+	 desired display position. */
+      if (new > prompt_last_invisible)		/* XXX - don't use woff here */
 	{
 	  dpos -= woff;
 	  /* Since this will be assigned to _rl_last_c_pos at the end (more
@@ -2380,6 +2421,8 @@
 
   if (end <= start)
     return 0;
+  if (MB_CUR_MAX == 1 || rl_byte_oriented)
+    return (end - start);
 
   memset (&ps, 0, sizeof (mbstate_t));