[hbelusca] 70281: [CONSRV]: Fix the code corresponding to ReadConsoleA/W API, now autocompletion from within windows' cmd.exe running on ReactOS works correctly. I add also some ASSERTs to be sure ...

Author: hbelusca
Date: Sat Dec  5 23:41:59 2015
New Revision: 70281

URL: http://svn.reactos.org/svn/reactos?rev=70281&view=rev
Log:
[CONSRV]: Fix the code corresponding to ReadConsoleA/W API, now autocompletion from within windows' cmd.exe running on ReactOS works correctly. I add also some ASSERTs to be sure of certain invariants (I might simplify part of the code related to that later on).

Modified:
    trunk/reactos/win32ss/user/winsrv/consrv/frontends/terminal.c

Modified: trunk/reactos/win32ss/user/winsrv/consrv/frontends/terminal.c
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/win32ss/user/winsrv/consrv/...
==============================================================================
--- trunk/reactos/win32ss/user/winsrv/consrv/frontends/terminal.c	[iso-8859-1] (original)
+++ trunk/reactos/win32ss/user/winsrv/consrv/frontends/terminal.c	[iso-8859-1] Sat Dec  5 23:41:59 2015
@@ -314,14 +314,13 @@

PLIST_ENTRY CurrentEntry;
     ConsoleInput *Input;
-    ULONG i;
+    ULONG i = 0;

/* Validity checks */
     // ASSERT(Console == InputBuffer->Header.Console);
     ASSERT((Buffer != NULL) || (Buffer == NULL && NumCharsToRead == 0));

/* We haven't read anything (yet) */
-    i = ReadControl->nInitialChars;

if (InputBuffer->Mode & ENABLE_LINE_INPUT)
     {
@@ -329,8 +328,9 @@

if (Console->LineBuffer == NULL)
         {
-            /* Starting a new line */
+            /* Start a new line */
             Console->LineMaxSize = max(256, NumCharsToRead);
+            ASSERT(ReadControl->nInitialChars <= Console->LineMaxSize);

Console->LineBuffer = ConsoleAllocHeap(0, Console->LineMaxSize * sizeof(WCHAR));
             if (Console->LineBuffer == NULL) return STATUS_NO_MEMORY;
@@ -341,8 +341,9 @@
             Console->LineWakeupMask = ReadControl->dwCtrlWakeupMask;

/*
-             * Pre-filling the buffer is only allowed in the Unicode API,
-             * so we don't need to worry about ANSI <-> Unicode conversion.
+             * Pre-fill the buffer with the nInitialChars from the user buffer.
+             * Since pre-filling is only allowed in Unicode, we don't need to
+             * worry about ANSI <-> Unicode conversion.
              */
             memcpy(Console->LineBuffer, Buffer, Console->LineSize * sizeof(WCHAR));
             if (Console->LineSize == Console->LineMaxSize)
@@ -377,6 +378,11 @@
         /* Check if we have a complete line to read from */
         if (Console->LineComplete)
         {
+            // NOTE: I want to check whether we always set LinePos to zero
+            // when LineComplete is set to TRUE.
+            // Basically, we are going to use LinePos as 'i'.
+            ASSERT(Console->LinePos == 0);
+
             while (i < NumCharsToRead && Console->LinePos != Console->LineSize)
             {
                 WCHAR Char = Console->LineBuffer[Console->LinePos++];