Recognise CR after wrap; update ANSICON_API docs

CR will match BS/CUB/HPB, moving back to previous line(s) after a wrap.

I hadn't updated the comment when I switched ANSICON_API from WriteFile
to WriteConsoleA.  Mention that is should be deleted when upgrading.

ANSI.c

@@ -152,7 +152,7 @@
     remove wcstok, avoiding potential interference with the host;
     similarly, use a private heap instead of malloc.
 
-  v1.80, 26 October to 22 December, 2017:
+  v1.80, 26 October to 24 December, 2017:
     fix unloading;
     revert back to (re)storing buffer cursor position;
     increase cache to five handles;
@@ -174,7 +174,7 @@
     added tab handling;
     added the bright SGR colors, recognised the system indices;
     added insert mode;
-    BS/CUB/HPB after wrap will move back to the previous line(s);
+    BS/CR/CUB/HPB after wrap will move back to the previous line(s);
     added DECOM, DECSTBM, SD & SU;
     only flush before accessing the console, adding a mode to flush immediately;
     added DECSTR & RIS;
@@ -861,6 +861,20 @@ void PushBuffer( WCHAR c )
 	MoveDown( TRUE );
     }
   }
+  else if (c == '\r')
+  {
+    FlushBuffer();
+    if (nWrapped)
+    {
+      GetConsoleScreenBufferInfo( hConOut, &Info );
+      CUR.Y -= nWrapped;
+      if (CUR.Y < 0) CUR.Y = 0;
+      if (pState->tb_margins && CUR.Y < TOP) CUR.Y = TOP;
+      set_pos( LEFT, CUR.Y );
+    }
+    else
+      ChBuffer[nCharInBuffer++] = c;
+  }
   else if (c == '\b')
   {
     BOOL bs = FALSE;
@@ -868,7 +882,7 @@ void PushBuffer( WCHAR c )
     if (nWrapped)
     {
       GetConsoleScreenBufferInfo( hConOut, &Info );
-      if (CUR.X == 0)
+      if (CUR.X == LEFT)
       {
 	CUR.X = RIGHT;
 	CUR.Y--;
@@ -3210,10 +3224,9 @@ WINAPI MyWriteConsoleA( HANDLE hCon, LPCVOID lpBuffer,
     if (rc && lpNumberOfCharsWritten != NULL &&
 	      *lpNumberOfCharsWritten != nNumberOfCharsToWrite)
     {
-      // Converting a multibyte character to Unicode results in a different
+      // I set the number of characters actually written, which may be 0 when
-      // "character" count.  This causes some programs to think not everything
+      // multibyte characters are split across calls.  If that causes problems,
-      // was written, so the difference is sent again.	Fudge the (presumably)
+      // restore original behaviour.
-      // correct count.
       if (search_env( L"ANSICON_API", prog ))
 	*lpNumberOfCharsWritten = nNumberOfCharsToWrite;
     }

ansicon.c

@@ -91,7 +91,7 @@
     use -pu to unload from the parent.
 */
 
-#define PDATE L"23 December, 2017"
+#define PDATE L"24 December, 2017"
 
 #include "ansicon.h"
 #include "version.h"

readme.txt

@@ -45,6 +45,11 @@ Installation
     ing the directory from PATH; and deleting the files.  No other changes are
     made (unless you created environment variables).
 
+Upgrading
+---------
+
+    Delete ANSICON_API - it has switched from WriteFile to WriteConsoleA.
+
 
 Usage
 =====
@@ -329,7 +334,7 @@ Version History
 
     Legend: + added, - bug-fixed, * changed.
 
-    1.80 - 23 December, 2017:
+    1.80 - 24 December, 2017:
     - fix unloading;
     - fix -e et al when redirecting to CON;
     - hook CreateFile and CreateConsoleScreenBuffer to force read/write access
@@ -345,7 +350,7 @@ Version History
     * preserve escape that isn't part of a sequence;
     * escaped control characters will display the control;
     * change the graphics SCAN characters to their Unicode equivalents;
-    * BS/CUB/HVP after wrap will move back to the previous line(s);
+    * BS/CR/CUB/HVP after wrap will move back to the previous line(s);
     * improve speed by only flushing when necessary, adding a mode to restore
       flushing immediately;
     + added DA, DECCOLM, DECNCSM, DECOM, DECPS, DECRC, DECSC, DECST8C, DECSTBM,
@@ -583,4 +588,4 @@ Distribution
 
 
 ==============================
-Jason Hood, 23 December, 2017.
+Jason Hood, 24 December, 2017.