[zguo] 65602: [SHIMGVW] Dynamically allocate the string for the file-type box. Patch by Ricardo Hanke. CORE-7702 #resolve

Author: zguo
Date: Wed Dec 10 21:27:18 2014
New Revision: 65602

URL: http://svn.reactos.org/svn/reactos?rev=65602&view=rev
Log:
[SHIMGVW]
Dynamically allocate the string for the file-type box. Patch by Ricardo Hanke.
CORE-7702 #resolve

Modified:
    trunk/reactos/dll/win32/shimgvw/shimgvw.c

Modified: trunk/reactos/dll/win32/shimgvw/shimgvw.c
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/dll/win32/shimgvw/shimgvw.c...
==============================================================================
--- trunk/reactos/dll/win32/shimgvw/shimgvw.c	[iso-8859-1] (original)
+++ trunk/reactos/dll/win32/shimgvw/shimgvw.c	[iso-8859-1] Wed Dec 10 21:27:18 2014
@@ -76,7 +76,7 @@
     OPENFILENAMEW sfn;
     ImageCodecInfo *codecInfo;
     WCHAR szSaveFileName[MAX_PATH];
-    WCHAR szFilterMask[2048];
+    WCHAR *szFilterMask;
     GUID rawFormat;
     UINT num;
     UINT size;
@@ -84,8 +84,38 @@
     UINT j;
     WCHAR *c;

+    GdipGetImageEncodersSize(&num, &size);
+    codecInfo = malloc(size);
+    if (!codecInfo)
+    {
+        DPRINT1("malloc() failed in pSaveImageAs()\n");
+        return;
+    }
+
+    GdipGetImageEncoders(num, size, codecInfo);
+    GdipGetImageRawFormat(image, &rawFormat);
+
+    sizeRemain = 0;
+
+    for (j = 0; j < num; ++j)
+    {
+        // Every pair needs space for the Description, twice the Extensions, 1 char for the space, 2 for the braces and 2 for the NULL terminators.
+        sizeRemain = sizeRemain + (((wcslen(codecInfo[j].FormatDescription) + (wcslen(codecInfo[j].FilenameExtension) * 2) + 5) * sizeof(WCHAR)));
+    }
+
+    /* Add two more chars for the last terminator */
+    sizeRemain = sizeRemain + (sizeof(WCHAR) * 2);
+
+    szFilterMask = malloc(sizeRemain);
+    if (!szFilterMask)
+    {
+        DPRINT1("cannot allocate memory for filter mask in pSaveImageAs()");
+        free(codecInfo);
+        return;
+    }
+
     ZeroMemory(szSaveFileName, sizeof(szSaveFileName));
-    ZeroMemory(szFilterMask, sizeof(szFilterMask));
+    ZeroMemory(szFilterMask, sizeRemain);
     ZeroMemory(&sfn, sizeof(sfn));
     sfn.lStructSize = sizeof(sfn);
     sfn.hwndOwner   = hwnd;
@@ -95,18 +125,6 @@
     sfn.nMaxFile    = MAX_PATH;
     sfn.Flags       = OFN_OVERWRITEPROMPT | OFN_HIDEREADONLY;

-    GdipGetImageEncodersSize(&num, &size);
-    codecInfo = malloc(size);
-    if (!codecInfo)
-    {
-        DPRINT1("malloc() failed in pSaveImageAs()\n");
-        return;
-    }
-
-    GdipGetImageEncoders(num, size, codecInfo);
-    GdipGetImageRawFormat(image, &rawFormat);
-
-    sizeRemain = sizeof(szFilterMask);
     c = szFilterMask;

for (j = 0; j < num; ++j)
@@ -137,6 +155,7 @@
         }
     }

+    free(szFilterMask);
     free(codecInfo);
 }