Rob Shearman : riched20: Always treat the nCount variable in the EM_GETTEXTEX handler as a character count .

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 4bff248783aa59965beb0be7883272d1671c3034
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=4bff248783aa59965beb0be788...

Author: Rob Shearman 
Date:   Fri Jan 18 13:24:26 2008 +0000

riched20: Always treat the nCount variable in the EM_GETTEXTEX handler as a character count.

Convert ex->cb into a character count before assigning it to nCount.

Remove some dubious minus ones that would result in different character 
counts for the Unicode and ANSI paths.

---

dlls/riched20/editor.c |   10 ++++++----
 1 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/dlls/riched20/editor.c b/dlls/riched20/editor.c
index a954500..705c5a1 100644
--- a/dlls/riched20/editor.c
+++ b/dlls/riched20/editor.c
@@ -2101,7 +2101,7 @@ static LRESULT RichEditWndProc_common(HWND hWnd, UINT msg, WPARAM wParam,
   case EM_GETTEXTEX:
   {
     GETTEXTEX *ex = (GETTEXTEX*)wParam;
-    int nStart, nCount;
+    int nStart, nCount; /* in chars */

if (ex->flags & ~(GT_SELECTION | GT_USECRLF))
       FIXME("GETTEXTEX flags 0x%08x not supported\n", ex->flags & ~(GT_SELECTION | GT_USECRLF));
@@ -2110,12 +2110,11 @@ static LRESULT RichEditWndProc_common(HWND hWnd, UINT msg, WPARAM wParam,
     {
       ME_GetSelection(editor, &nStart, &nCount);
       nCount -= nStart;
-      nCount = min(nCount, ex->cb - 1);
     }
     else
     {
       nStart = 0;
-      nCount = ex->cb - 1;
+      nCount = 0x7fffffff;
     }
     if (ex->codepage == 1200)
     {
@@ -2127,11 +2126,14 @@ static LRESULT RichEditWndProc_common(HWND hWnd, UINT msg, WPARAM wParam,
       /* potentially each char may be a CR, why calculate the exact value with O(N) when
         we can just take a bigger buffer? :) */
       int crlfmul = (ex->flags & GT_USECRLF) ? 2 : 1;
-      LPWSTR buffer = heap_alloc((crlfmul*nCount + 1) * sizeof(WCHAR));
+      LPWSTR buffer;
       DWORD buflen = ex->cb;
       LRESULT rc;
       DWORD flags = 0;

+      nCount = min(nCount, ex->cb - 1);
+      buffer = heap_alloc((crlfmul*nCount + 1) * sizeof(WCHAR));
+
       buflen = ME_GetTextW(editor, buffer, nStart, nCount, ex->flags & GT_USECRLF);
       rc = WideCharToMultiByte(ex->codepage, flags, buffer, -1, (LPSTR)lParam, ex->cb, ex->lpDefaultChar, ex->lpUsedDefaultChar);
       if (rc) rc--; /* do not count 0 terminator */