[cfinck] 70595: [WINSPOOL] Additional tests show that IsValidDevmodeA/W actually does a lot more than I previously thought. Implement the missing known features and test this little function to dea...

Author: cfinck
Date: Fri Jan 15 04:36:31 2016
New Revision: 70595

URL: http://svn.reactos.org/svn/reactos?rev=70595&view=rev
Log:
[WINSPOOL]
Additional tests show that IsValidDevmodeA/W actually does a lot more than I previously
thought.
Implement the missing known features and test this little function to death in
winspool_apitest to cover each and every possible call.
They pass on ReactOS, Windows Server 2003 and Windows 8.1.

Credits and many thanks go to Mark Jansen for the additional tests!

Modified:
    branches/colins-printing-for-freedom/reactos/win32ss/printing/base/winspool/devmode.c
    branches/colins-printing-for-freedom/rostests/apitests/winspool/IsValidDevmode.c

Modified:
branches/colins-printing-for-freedom/reactos/win32ss/printing/base/winspool/devmode.c
URL:
http://svn.reactos.org/svn/reactos/branches/colins-printing-for-freedom/rea…
==============================================================================
---
branches/colins-printing-for-freedom/reactos/win32ss/printing/base/winspool/devmode.c	[iso-8859-1]
(original)
+++
branches/colins-printing-for-freedom/reactos/win32ss/printing/base/winspool/devmode.c	[iso-8859-1]
Fri Jan 15 04:36:31 2016
@@ -7,36 +7,225 @@
 
 #include "precomp.h"
 
+typedef struct _MINIMUM_SIZE_TABLE
+{
+    DWORD dwField;
+    WORD wSize;
+}
+MINIMUM_SIZE_TABLE, *PMINIMUM_SIZE_TABLE;
+
+/**
+ * Minimum required DEVMODEA structure size based on the used fields. Must be in
descending order!
+ */
+static MINIMUM_SIZE_TABLE MinimumSizeA[] = {
+    { DM_PANNINGHEIGHT, FIELD_OFFSET(DEVMODEA, dmPanningHeight) +
RTL_FIELD_SIZE(DEVMODEA, dmPanningHeight) },
+    { DM_PANNINGWIDTH, FIELD_OFFSET(DEVMODEA, dmPanningWidth) + RTL_FIELD_SIZE(DEVMODEA,
dmPanningWidth) },
+    { DM_DITHERTYPE, FIELD_OFFSET(DEVMODEA, dmDitherType) + RTL_FIELD_SIZE(DEVMODEA,
dmDitherType) },
+    { DM_MEDIATYPE, FIELD_OFFSET(DEVMODEA, dmMediaType) + RTL_FIELD_SIZE(DEVMODEA,
dmMediaType) },
+    { DM_ICMINTENT, FIELD_OFFSET(DEVMODEA, dmICMIntent) + RTL_FIELD_SIZE(DEVMODEA,
dmICMIntent) },
+    { DM_ICMMETHOD, FIELD_OFFSET(DEVMODEA, dmICMMethod) + RTL_FIELD_SIZE(DEVMODEA,
dmICMMethod) },
+    { DM_DISPLAYFREQUENCY, FIELD_OFFSET(DEVMODEA, dmDisplayFrequency) +
RTL_FIELD_SIZE(DEVMODEA, dmDisplayFrequency) },
+    { DM_NUP, FIELD_OFFSET(DEVMODEA, dmNup) + RTL_FIELD_SIZE(DEVMODEA, dmNup) },
+    { DM_DISPLAYFLAGS, FIELD_OFFSET(DEVMODEA, dmDisplayFlags) + RTL_FIELD_SIZE(DEVMODEA,
dmDisplayFlags) },
+    { DM_PELSHEIGHT, FIELD_OFFSET(DEVMODEA, dmPelsHeight) + RTL_FIELD_SIZE(DEVMODEA,
dmPelsHeight) },
+    { DM_PELSWIDTH, FIELD_OFFSET(DEVMODEA, dmPelsWidth) + RTL_FIELD_SIZE(DEVMODEA,
dmPelsWidth) },
+    { DM_BITSPERPEL, FIELD_OFFSET(DEVMODEA, dmBitsPerPel) + RTL_FIELD_SIZE(DEVMODEA,
dmBitsPerPel) },
+    { DM_LOGPIXELS, FIELD_OFFSET(DEVMODEA, dmLogPixels) + RTL_FIELD_SIZE(DEVMODEA,
dmLogPixels) },
+    { DM_FORMNAME, FIELD_OFFSET(DEVMODEA, dmFormName) + RTL_FIELD_SIZE(DEVMODEA,
dmFormName) },
+    { DM_COLLATE, FIELD_OFFSET(DEVMODEA, dmCollate) + RTL_FIELD_SIZE(DEVMODEA, dmCollate)
},
+    { DM_TTOPTION, FIELD_OFFSET(DEVMODEA, dmTTOption) + RTL_FIELD_SIZE(DEVMODEA,
dmTTOption) },
+    { DM_YRESOLUTION, FIELD_OFFSET(DEVMODEA, dmYResolution) + RTL_FIELD_SIZE(DEVMODEA,
dmYResolution) },
+    { DM_DUPLEX, FIELD_OFFSET(DEVMODEA, dmDuplex) + RTL_FIELD_SIZE(DEVMODEA, dmDuplex)
},
+    { DM_COLOR, FIELD_OFFSET(DEVMODEA, dmColor) + RTL_FIELD_SIZE(DEVMODEA, dmColor) },
+    { DM_DISPLAYFIXEDOUTPUT, FIELD_OFFSET(DEVMODEA, dmDisplayFixedOutput) +
RTL_FIELD_SIZE(DEVMODEA, dmDisplayFixedOutput) },
+    { DM_DISPLAYORIENTATION, FIELD_OFFSET(DEVMODEA, dmDisplayOrientation) +
RTL_FIELD_SIZE(DEVMODEA, dmDisplayOrientation) },
+    { DM_POSITION, FIELD_OFFSET(DEVMODEA, dmPosition) + RTL_FIELD_SIZE(DEVMODEA,
dmPosition) },
+    { DM_PRINTQUALITY, FIELD_OFFSET(DEVMODEA, dmPrintQuality) + RTL_FIELD_SIZE(DEVMODEA,
dmPrintQuality) },
+    { DM_DEFAULTSOURCE, FIELD_OFFSET(DEVMODEA, dmDefaultSource) +
RTL_FIELD_SIZE(DEVMODEA, dmDefaultSource) },
+    { DM_COPIES, FIELD_OFFSET(DEVMODEA, dmCopies) + RTL_FIELD_SIZE(DEVMODEA, dmCopies)
},
+    { DM_SCALE, FIELD_OFFSET(DEVMODEA, dmScale) + RTL_FIELD_SIZE(DEVMODEA, dmScale) },
+    { DM_PAPERWIDTH, FIELD_OFFSET(DEVMODEA, dmPaperWidth) + RTL_FIELD_SIZE(DEVMODEA,
dmPaperWidth) },
+    { DM_PAPERLENGTH, FIELD_OFFSET(DEVMODEA, dmPaperLength) + RTL_FIELD_SIZE(DEVMODEA,
dmPaperLength) },
+    { DM_PAPERSIZE, FIELD_OFFSET(DEVMODEA, dmPaperSize) + RTL_FIELD_SIZE(DEVMODEA,
dmPaperSize) },
+    { DM_ORIENTATION, FIELD_OFFSET(DEVMODEA, dmOrientation) + RTL_FIELD_SIZE(DEVMODEA,
dmOrientation) },
+    { 0, 0 }
+};
+
+/**
+ * Minimum required DEVMODEW structure size based on the used fields. Must be in
descending order!
+ */
+static MINIMUM_SIZE_TABLE MinimumSizeW[] = {
+    { DM_PANNINGHEIGHT, FIELD_OFFSET(DEVMODEW, dmPanningHeight) +
RTL_FIELD_SIZE(DEVMODEW, dmPanningHeight) },
+    { DM_PANNINGWIDTH, FIELD_OFFSET(DEVMODEW, dmPanningWidth) + RTL_FIELD_SIZE(DEVMODEW,
dmPanningWidth) },
+    { DM_DITHERTYPE, FIELD_OFFSET(DEVMODEW, dmDitherType) + RTL_FIELD_SIZE(DEVMODEW,
dmDitherType) },
+    { DM_MEDIATYPE, FIELD_OFFSET(DEVMODEW, dmMediaType) + RTL_FIELD_SIZE(DEVMODEW,
dmMediaType) },
+    { DM_ICMINTENT, FIELD_OFFSET(DEVMODEW, dmICMIntent) + RTL_FIELD_SIZE(DEVMODEW,
dmICMIntent) },
+    { DM_ICMMETHOD, FIELD_OFFSET(DEVMODEW, dmICMMethod) + RTL_FIELD_SIZE(DEVMODEW,
dmICMMethod) },
+    { DM_DISPLAYFREQUENCY, FIELD_OFFSET(DEVMODEW, dmDisplayFrequency) +
RTL_FIELD_SIZE(DEVMODEW, dmDisplayFrequency) },
+    { DM_NUP, FIELD_OFFSET(DEVMODEW, dmNup) + RTL_FIELD_SIZE(DEVMODEW, dmNup) },
+    { DM_DISPLAYFLAGS, FIELD_OFFSET(DEVMODEW, dmDisplayFlags) + RTL_FIELD_SIZE(DEVMODEW,
dmDisplayFlags) },
+    { DM_PELSHEIGHT, FIELD_OFFSET(DEVMODEW, dmPelsHeight) + RTL_FIELD_SIZE(DEVMODEW,
dmPelsHeight) },
+    { DM_PELSWIDTH, FIELD_OFFSET(DEVMODEW, dmPelsWidth) + RTL_FIELD_SIZE(DEVMODEW,
dmPelsWidth) },
+    { DM_BITSPERPEL, FIELD_OFFSET(DEVMODEW, dmBitsPerPel) + RTL_FIELD_SIZE(DEVMODEW,
dmBitsPerPel) },
+    { DM_LOGPIXELS, FIELD_OFFSET(DEVMODEW, dmLogPixels) + RTL_FIELD_SIZE(DEVMODEW,
dmLogPixels) },
+    { DM_FORMNAME, FIELD_OFFSET(DEVMODEW, dmFormName) + RTL_FIELD_SIZE(DEVMODEW,
dmFormName) },
+    { DM_COLLATE, FIELD_OFFSET(DEVMODEW, dmCollate) + RTL_FIELD_SIZE(DEVMODEW, dmCollate)
},
+    { DM_TTOPTION, FIELD_OFFSET(DEVMODEW, dmTTOption) + RTL_FIELD_SIZE(DEVMODEW,
dmTTOption) },
+    { DM_YRESOLUTION, FIELD_OFFSET(DEVMODEW, dmYResolution) + RTL_FIELD_SIZE(DEVMODEW,
dmYResolution) },
+    { DM_DUPLEX, FIELD_OFFSET(DEVMODEW, dmDuplex) + RTL_FIELD_SIZE(DEVMODEW, dmDuplex)
},
+    { DM_COLOR, FIELD_OFFSET(DEVMODEW, dmColor) + RTL_FIELD_SIZE(DEVMODEW, dmColor) },
+    { DM_DISPLAYFIXEDOUTPUT, FIELD_OFFSET(DEVMODEW, dmDisplayFixedOutput) +
RTL_FIELD_SIZE(DEVMODEW, dmDisplayFixedOutput) },
+    { DM_DISPLAYORIENTATION, FIELD_OFFSET(DEVMODEW, dmDisplayOrientation) +
RTL_FIELD_SIZE(DEVMODEW, dmDisplayOrientation) },
+    { DM_POSITION, FIELD_OFFSET(DEVMODEW, dmPosition) + RTL_FIELD_SIZE(DEVMODEW,
dmPosition) },
+    { DM_PRINTQUALITY, FIELD_OFFSET(DEVMODEW, dmPrintQuality) + RTL_FIELD_SIZE(DEVMODEW,
dmPrintQuality) },
+    { DM_DEFAULTSOURCE, FIELD_OFFSET(DEVMODEW, dmDefaultSource) +
RTL_FIELD_SIZE(DEVMODEW, dmDefaultSource) },
+    { DM_COPIES, FIELD_OFFSET(DEVMODEW, dmCopies) + RTL_FIELD_SIZE(DEVMODEW, dmCopies)
},
+    { DM_SCALE, FIELD_OFFSET(DEVMODEW, dmScale) + RTL_FIELD_SIZE(DEVMODEW, dmScale) },
+    { DM_PAPERWIDTH, FIELD_OFFSET(DEVMODEW, dmPaperWidth) + RTL_FIELD_SIZE(DEVMODEW,
dmPaperWidth) },
+    { DM_PAPERLENGTH, FIELD_OFFSET(DEVMODEW, dmPaperLength) + RTL_FIELD_SIZE(DEVMODEW,
dmPaperLength) },
+    { DM_PAPERSIZE, FIELD_OFFSET(DEVMODEW, dmPaperSize) + RTL_FIELD_SIZE(DEVMODEW,
dmPaperSize) },
+    { DM_ORIENTATION, FIELD_OFFSET(DEVMODEW, dmOrientation) + RTL_FIELD_SIZE(DEVMODEW,
dmOrientation) },
+    { 0, 0 }
+};
+
+/**
+ * Replace the last character by a null terminator if the given ANSI string is not
null-terminated.
+ */
+static __inline void
+_FixStringA(PBYTE String, DWORD cbString)
+{
+    const PBYTE pLastCharacter = &String[cbString / sizeof(BYTE) - 1];
+    PBYTE p = String;
+
+    while (*p)
+    {
+        if (p == pLastCharacter)
+        {
+            *p = 0;
+            break;
+        }
+
+        p++;
+    }
+}
+
+/**
+ * Replace the last character by a null terminator if the given Unicode string is not
null-terminated.
+ */
+static __inline void
+_FixStringW(PWSTR String, DWORD cbString)
+{
+    const PWSTR pLastCharacter = &String[cbString / sizeof(WCHAR) - 1];
+    PWSTR p = String;
+
+    while (*p)
+    {
+        if (p == pLastCharacter)
+        {
+            *p = 0;
+            break;
+        }
+
+        p++;
+    }
+}
+
 BOOL WINAPI
 IsValidDevmodeA(PDEVMODEA pDevmode, size_t DevmodeSize)
 {
-    // Check if a Devmode was given, its dmSize member is at least as big as the DEVMODEA
structure
-    // and DevmodeSize is large enough for the public and private members of the
structure.
-    if (!pDevmode ||
-        pDevmode->dmSize < sizeof(DEVMODEA) ||
-        DevmodeSize < pDevmode->dmSize + pDevmode->dmDriverExtra)
-    {
-        SetLastError(ERROR_INVALID_DATA);
-        return FALSE;
-    }
+    PMINIMUM_SIZE_TABLE pTable = MinimumSizeA;
+    WORD wRequiredSize;
+
+    // Check if a Devmode was given at all.
+    if (!pDevmode)
+        goto Failure;
+
+    // Verify that DevmodeSize is large enough to hold the public and private members of
the structure.
+    if (DevmodeSize < pDevmode->dmSize + pDevmode->dmDriverExtra)
+        goto Failure;
+
+    // If the structure has private members, the public structure must be 32-bit packed.
+    if (pDevmode->dmDriverExtra && pDevmode->dmSize % 4)
+        goto Failure;
+
+    // Now determine the minimum possible dmSize based on the given fields in dmFields.
+    wRequiredSize = FIELD_OFFSET(DEVMODEA, dmFields) + RTL_FIELD_SIZE(DEVMODEA,
dmFields);
+
+    while (pTable->dwField)
+    {
+        if (pDevmode->dmFields & pTable->dwField)
+        {
+            wRequiredSize = pTable->wSize;
+            break;
+        }
+
+        pTable++;
+    }
+
+    // Verify that the value in dmSize is big enough for the used fields.
+    if (pDevmode->dmSize < wRequiredSize)
+        goto Failure;
+
+    // Check if dmDeviceName and (if used) dmFormName are null-terminated.
+    // Fix this if they aren't.
+    _FixStringA(pDevmode->dmDeviceName, sizeof(pDevmode->dmDeviceName));
+    if (pDevmode->dmFields & DM_FORMNAME)
+        _FixStringA(pDevmode->dmFormName, sizeof(pDevmode->dmFormName));
 
     // Return success without setting the error code.
     return TRUE;
+
+Failure:
+    SetLastError(ERROR_INVALID_DATA);
+    return FALSE;
 }
 
 BOOL WINAPI
 IsValidDevmodeW(PDEVMODEW pDevmode, size_t DevmodeSize)
 {
-    // Check if a Devmode was given, its dmSize member is at least as big as the DEVMODEW
structure
-    // and DevmodeSize is large enough for the public and private members of the
structure.
-    if (!pDevmode ||
-        pDevmode->dmSize < sizeof(DEVMODEW) ||
-        DevmodeSize < pDevmode->dmSize + pDevmode->dmDriverExtra)
-    {
-        SetLastError(ERROR_INVALID_DATA);
-        return FALSE;
-    }
+    PMINIMUM_SIZE_TABLE pTable = MinimumSizeW;
+    WORD wRequiredSize;
+
+    // Check if a Devmode was given at all.
+    if (!pDevmode)
+        goto Failure;
+
+    // Verify that DevmodeSize is large enough to hold the public and private members of
the structure.
+    if (DevmodeSize < pDevmode->dmSize + pDevmode->dmDriverExtra)
+        goto Failure;
+
+    // If the structure has private members, the public structure must be 32-bit packed.
+    if (pDevmode->dmDriverExtra && pDevmode->dmSize % 4)
+        goto Failure;
+
+    // Now determine the minimum possible dmSize based on the given fields in dmFields.
+    wRequiredSize = FIELD_OFFSET(DEVMODEW, dmFields) + RTL_FIELD_SIZE(DEVMODEW,
dmFields);
+
+    while (pTable->dwField)
+    {
+        if (pDevmode->dmFields & pTable->dwField)
+        {
+            wRequiredSize = pTable->wSize;
+            break;
+        }
+
+        pTable++;
+    }
+
+    // Verify that the value in dmSize is big enough for the used fields.
+    if (pDevmode->dmSize < wRequiredSize)
+        goto Failure;
+
+    // Check if dmDeviceName and (if used) dmFormName are null-terminated.
+    // Fix this if they aren't.
+    _FixStringW(pDevmode->dmDeviceName, sizeof(pDevmode->dmDeviceName));
+    if (pDevmode->dmFields & DM_FORMNAME)
+        _FixStringW(pDevmode->dmFormName, sizeof(pDevmode->dmFormName));
 
     // Return success without setting the error code.
     return TRUE;
-}
+
+Failure:
+    SetLastError(ERROR_INVALID_DATA);
+    return FALSE;
+}

Modified:
branches/colins-printing-for-freedom/rostests/apitests/winspool/IsValidDevmode.c
URL:
http://svn.reactos.org/svn/reactos/branches/colins-printing-for-freedom/ros…
==============================================================================
---
branches/colins-printing-for-freedom/rostests/apitests/winspool/IsValidDevmode.c	[iso-8859-1]
(original)
+++
branches/colins-printing-for-freedom/rostests/apitests/winspool/IsValidDevmode.c	[iso-8859-1]
Fri Jan 15 04:36:31 2016
@@ -12,16 +12,89 @@
 #include <winbase.h>
 #include <wingdi.h>
 #include <winspool.h>
-
-// With very high probability, this is everything you can test for IsValidDevmode.
-// For your own testing, you can fill a DevMode structure with random bytes multiple
times,
-// always set dmSize and dmDriverExtra appropriately and feed it to IsValidDevmode.
-// The function will always succeed.
-// I'm not doing that here, because I don't want to introduce randomness.
+#include <wchar.h>
+
+typedef struct _MINIMUM_SIZE_TABLE
+{
+    DWORD dwField;
+    WORD wSize;
+}
+MINIMUM_SIZE_TABLE, *PMINIMUM_SIZE_TABLE;
+
+static MINIMUM_SIZE_TABLE MinimumSizeA[] = {
+    { DM_PANNINGHEIGHT, FIELD_OFFSET(DEVMODEA, dmPanningHeight) +
RTL_FIELD_SIZE(DEVMODEA, dmPanningHeight) },
+    { DM_PANNINGWIDTH, FIELD_OFFSET(DEVMODEA, dmPanningWidth) + RTL_FIELD_SIZE(DEVMODEA,
dmPanningWidth) },
+    { DM_DITHERTYPE, FIELD_OFFSET(DEVMODEA, dmDitherType) + RTL_FIELD_SIZE(DEVMODEA,
dmDitherType) },
+    { DM_MEDIATYPE, FIELD_OFFSET(DEVMODEA, dmMediaType) + RTL_FIELD_SIZE(DEVMODEA,
dmMediaType) },
+    { DM_ICMINTENT, FIELD_OFFSET(DEVMODEA, dmICMIntent) + RTL_FIELD_SIZE(DEVMODEA,
dmICMIntent) },
+    { DM_ICMMETHOD, FIELD_OFFSET(DEVMODEA, dmICMMethod) + RTL_FIELD_SIZE(DEVMODEA,
dmICMMethod) },
+    { DM_DISPLAYFREQUENCY, FIELD_OFFSET(DEVMODEA, dmDisplayFrequency) +
RTL_FIELD_SIZE(DEVMODEA, dmDisplayFrequency) },
+    { DM_NUP, FIELD_OFFSET(DEVMODEA, dmNup) + RTL_FIELD_SIZE(DEVMODEA, dmNup) },
+    { DM_DISPLAYFLAGS, FIELD_OFFSET(DEVMODEA, dmDisplayFlags) + RTL_FIELD_SIZE(DEVMODEA,
dmDisplayFlags) },
+    { DM_PELSHEIGHT, FIELD_OFFSET(DEVMODEA, dmPelsHeight) + RTL_FIELD_SIZE(DEVMODEA,
dmPelsHeight) },
+    { DM_PELSWIDTH, FIELD_OFFSET(DEVMODEA, dmPelsWidth) + RTL_FIELD_SIZE(DEVMODEA,
dmPelsWidth) },
+    { DM_BITSPERPEL, FIELD_OFFSET(DEVMODEA, dmBitsPerPel) + RTL_FIELD_SIZE(DEVMODEA,
dmBitsPerPel) },
+    { DM_LOGPIXELS, FIELD_OFFSET(DEVMODEA, dmLogPixels) + RTL_FIELD_SIZE(DEVMODEA,
dmLogPixels) },
+    { DM_FORMNAME, FIELD_OFFSET(DEVMODEA, dmFormName) + RTL_FIELD_SIZE(DEVMODEA,
dmFormName) },
+    { DM_COLLATE, FIELD_OFFSET(DEVMODEA, dmCollate) + RTL_FIELD_SIZE(DEVMODEA, dmCollate)
},
+    { DM_TTOPTION, FIELD_OFFSET(DEVMODEA, dmTTOption) + RTL_FIELD_SIZE(DEVMODEA,
dmTTOption) },
+    { DM_YRESOLUTION, FIELD_OFFSET(DEVMODEA, dmYResolution) + RTL_FIELD_SIZE(DEVMODEA,
dmYResolution) },
+    { DM_DUPLEX, FIELD_OFFSET(DEVMODEA, dmDuplex) + RTL_FIELD_SIZE(DEVMODEA, dmDuplex)
},
+    { DM_COLOR, FIELD_OFFSET(DEVMODEA, dmColor) + RTL_FIELD_SIZE(DEVMODEA, dmColor) },
+    { DM_DISPLAYFIXEDOUTPUT, FIELD_OFFSET(DEVMODEA, dmDisplayFixedOutput) +
RTL_FIELD_SIZE(DEVMODEA, dmDisplayFixedOutput) },
+    { DM_DISPLAYORIENTATION, FIELD_OFFSET(DEVMODEA, dmDisplayOrientation) +
RTL_FIELD_SIZE(DEVMODEA, dmDisplayOrientation) },
+    { DM_POSITION, FIELD_OFFSET(DEVMODEA, dmPosition) + RTL_FIELD_SIZE(DEVMODEA,
dmPosition) },
+    { DM_PRINTQUALITY, FIELD_OFFSET(DEVMODEA, dmPrintQuality) + RTL_FIELD_SIZE(DEVMODEA,
dmPrintQuality) },
+    { DM_DEFAULTSOURCE, FIELD_OFFSET(DEVMODEA, dmDefaultSource) +
RTL_FIELD_SIZE(DEVMODEA, dmDefaultSource) },
+    { DM_COPIES, FIELD_OFFSET(DEVMODEA, dmCopies) + RTL_FIELD_SIZE(DEVMODEA, dmCopies)
},
+    { DM_SCALE, FIELD_OFFSET(DEVMODEA, dmScale) + RTL_FIELD_SIZE(DEVMODEA, dmScale) },
+    { DM_PAPERWIDTH, FIELD_OFFSET(DEVMODEA, dmPaperWidth) + RTL_FIELD_SIZE(DEVMODEA,
dmPaperWidth) },
+    { DM_PAPERLENGTH, FIELD_OFFSET(DEVMODEA, dmPaperLength) + RTL_FIELD_SIZE(DEVMODEA,
dmPaperLength) },
+    { DM_PAPERSIZE, FIELD_OFFSET(DEVMODEA, dmPaperSize) + RTL_FIELD_SIZE(DEVMODEA,
dmPaperSize) },
+    { DM_ORIENTATION, FIELD_OFFSET(DEVMODEA, dmOrientation) + RTL_FIELD_SIZE(DEVMODEA,
dmOrientation) },
+    { 0, FIELD_OFFSET(DEVMODEA, dmFields) + RTL_FIELD_SIZE(DEVMODEA, dmFields) }
+};
+
+static MINIMUM_SIZE_TABLE MinimumSizeW[] = {
+    { DM_PANNINGHEIGHT, FIELD_OFFSET(DEVMODEW, dmPanningHeight) +
RTL_FIELD_SIZE(DEVMODEW, dmPanningHeight) },
+    { DM_PANNINGWIDTH, FIELD_OFFSET(DEVMODEW, dmPanningWidth) + RTL_FIELD_SIZE(DEVMODEW,
dmPanningWidth) },
+    { DM_DITHERTYPE, FIELD_OFFSET(DEVMODEW, dmDitherType) + RTL_FIELD_SIZE(DEVMODEW,
dmDitherType) },
+    { DM_MEDIATYPE, FIELD_OFFSET(DEVMODEW, dmMediaType) + RTL_FIELD_SIZE(DEVMODEW,
dmMediaType) },
+    { DM_ICMINTENT, FIELD_OFFSET(DEVMODEW, dmICMIntent) + RTL_FIELD_SIZE(DEVMODEW,
dmICMIntent) },
+    { DM_ICMMETHOD, FIELD_OFFSET(DEVMODEW, dmICMMethod) + RTL_FIELD_SIZE(DEVMODEW,
dmICMMethod) },
+    { DM_DISPLAYFREQUENCY, FIELD_OFFSET(DEVMODEW, dmDisplayFrequency) +
RTL_FIELD_SIZE(DEVMODEW, dmDisplayFrequency) },
+    { DM_NUP, FIELD_OFFSET(DEVMODEW, dmNup) + RTL_FIELD_SIZE(DEVMODEW, dmNup) },
+    { DM_DISPLAYFLAGS, FIELD_OFFSET(DEVMODEW, dmDisplayFlags) + RTL_FIELD_SIZE(DEVMODEW,
dmDisplayFlags) },
+    { DM_PELSHEIGHT, FIELD_OFFSET(DEVMODEW, dmPelsHeight) + RTL_FIELD_SIZE(DEVMODEW,
dmPelsHeight) },
+    { DM_PELSWIDTH, FIELD_OFFSET(DEVMODEW, dmPelsWidth) + RTL_FIELD_SIZE(DEVMODEW,
dmPelsWidth) },
+    { DM_BITSPERPEL, FIELD_OFFSET(DEVMODEW, dmBitsPerPel) + RTL_FIELD_SIZE(DEVMODEW,
dmBitsPerPel) },
+    { DM_LOGPIXELS, FIELD_OFFSET(DEVMODEW, dmLogPixels) + RTL_FIELD_SIZE(DEVMODEW,
dmLogPixels) },
+    { DM_FORMNAME, FIELD_OFFSET(DEVMODEW, dmFormName) + RTL_FIELD_SIZE(DEVMODEW,
dmFormName) },
+    { DM_COLLATE, FIELD_OFFSET(DEVMODEW, dmCollate) + RTL_FIELD_SIZE(DEVMODEW, dmCollate)
},
+    { DM_TTOPTION, FIELD_OFFSET(DEVMODEW, dmTTOption) + RTL_FIELD_SIZE(DEVMODEW,
dmTTOption) },
+    { DM_YRESOLUTION, FIELD_OFFSET(DEVMODEW, dmYResolution) + RTL_FIELD_SIZE(DEVMODEW,
dmYResolution) },
+    { DM_DUPLEX, FIELD_OFFSET(DEVMODEW, dmDuplex) + RTL_FIELD_SIZE(DEVMODEW, dmDuplex)
},
+    { DM_COLOR, FIELD_OFFSET(DEVMODEW, dmColor) + RTL_FIELD_SIZE(DEVMODEW, dmColor) },
+    { DM_DISPLAYFIXEDOUTPUT, FIELD_OFFSET(DEVMODEW, dmDisplayFixedOutput) +
RTL_FIELD_SIZE(DEVMODEW, dmDisplayFixedOutput) },
+    { DM_DISPLAYORIENTATION, FIELD_OFFSET(DEVMODEW, dmDisplayOrientation) +
RTL_FIELD_SIZE(DEVMODEW, dmDisplayOrientation) },
+    { DM_POSITION, FIELD_OFFSET(DEVMODEW, dmPosition) + RTL_FIELD_SIZE(DEVMODEW,
dmPosition) },
+    { DM_PRINTQUALITY, FIELD_OFFSET(DEVMODEW, dmPrintQuality) + RTL_FIELD_SIZE(DEVMODEW,
dmPrintQuality) },
+    { DM_DEFAULTSOURCE, FIELD_OFFSET(DEVMODEW, dmDefaultSource) +
RTL_FIELD_SIZE(DEVMODEW, dmDefaultSource) },
+    { DM_COPIES, FIELD_OFFSET(DEVMODEW, dmCopies) + RTL_FIELD_SIZE(DEVMODEW, dmCopies)
},
+    { DM_SCALE, FIELD_OFFSET(DEVMODEW, dmScale) + RTL_FIELD_SIZE(DEVMODEW, dmScale) },
+    { DM_PAPERWIDTH, FIELD_OFFSET(DEVMODEW, dmPaperWidth) + RTL_FIELD_SIZE(DEVMODEW,
dmPaperWidth) },
+    { DM_PAPERLENGTH, FIELD_OFFSET(DEVMODEW, dmPaperLength) + RTL_FIELD_SIZE(DEVMODEW,
dmPaperLength) },
+    { DM_PAPERSIZE, FIELD_OFFSET(DEVMODEW, dmPaperSize) + RTL_FIELD_SIZE(DEVMODEW,
dmPaperSize) },
+    { DM_ORIENTATION, FIELD_OFFSET(DEVMODEW, dmOrientation) + RTL_FIELD_SIZE(DEVMODEW,
dmOrientation) },
+    { 0, FIELD_OFFSET(DEVMODEW, dmFields) + RTL_FIELD_SIZE(DEVMODEW, dmFields) }
+};
+
+
 
 START_TEST(IsValidDevmodeA)
 {
     DEVMODEA DevMode;
+    PMINIMUM_SIZE_TABLE pTable = MinimumSizeA;
 
     // Give no Devmode at all, this has to fail without crashing.
     SetLastError(0xDEADBEEF);
@@ -72,11 +145,63 @@
     SetLastError(0xDEADBEEF);
     ok(IsValidDevmodeA(&DevMode, sizeof(DEVMODEA) + 1), "IsValidDevmodeA returns
FALSE!\n");
     ok(GetLastError() == 0xDEADBEEF, "IsValidDevmodeA returns error %lu!\n",
GetLastError());
+
+    // dmSize must be a multiple of 4 if any dmDriverExtra is given.
+    for (DevMode.dmDriverExtra = 1; DevMode.dmDriverExtra <= 4;
DevMode.dmDriverExtra++)
+    {
+        for (DevMode.dmSize = sizeof(DEVMODEA); DevMode.dmSize < sizeof(DEVMODEA) + 4;
DevMode.dmSize++)
+        {
+            BOOL bExpected = (DevMode.dmSize % 4 == 0);
+            DWORD dwExpectedError = (bExpected ? 0xDEADBEEF : ERROR_INVALID_DATA);
+
+            SetLastError(0xDEADBEEF);
+            ok(IsValidDevmodeA(&DevMode, DevMode.dmSize + DevMode.dmDriverExtra) ==
bExpected, "IsValidDevmodeA returns %d!\n", !bExpected);
+            ok(GetLastError() == dwExpectedError, "IsValidDevmodeA returns error
%lu!\n", GetLastError());
+        }
+    }
+
+    // IsValidDevmodeA also fixes missing null-terminations if the corresponding fields
are used.
+    ZeroMemory(&DevMode, sizeof(DEVMODEA));
+    DevMode.dmSize = sizeof(DEVMODEA);
+    memset(DevMode.dmDeviceName, 'A', 32);
+    memset(DevMode.dmFormName, 'A', 32);
+    ok(IsValidDevmodeA(&DevMode, DevMode.dmSize), "IsValidDevmodeA returns
FALSE!\n");
+    ok(DevMode.dmDeviceName[31] == '\0', "Expected dmDeviceName to be
'\\0', but is '%c'\n", DevMode.dmDeviceName[31]);
+    ok(DevMode.dmFormName[31] == 'A', "Expected dmFormName to be
'A', but is '%c'\n", DevMode.dmDeviceName[31]);
+
+    ZeroMemory(&DevMode, sizeof(DEVMODEA));
+    DevMode.dmSize = sizeof(DEVMODEA);
+    DevMode.dmFields = DM_FORMNAME;
+    memset(DevMode.dmDeviceName, 'A', 32);
+    memset(DevMode.dmFormName, 'A', 32);
+    ok(IsValidDevmodeA(&DevMode, DevMode.dmSize), "IsValidDevmodeA returns
FALSE!\n");
+    ok(DevMode.dmDeviceName[31] == '\0', "Expected dmDeviceName to be
'\\0', but is '%c'\n", DevMode.dmDeviceName[31]);
+    ok(DevMode.dmFormName[31] == '\0', "Expected dmFormName to be
'\\0', but is '%c'\n", DevMode.dmDeviceName[31]);
+
+    // Depending on which fields are given in dmFields, the minimum value for dmSize is
different.
+    ZeroMemory(&DevMode, sizeof(DEVMODEA));
+
+    do
+    {
+        DevMode.dmFields = pTable->dwField;
+        DevMode.dmSize = pTable->wSize;
+
+        // This size should succeed!
+        ok(IsValidDevmodeA(&DevMode, DevMode.dmSize), "IsValidDevmodeA returns
FALSE!\n");
+
+        // One byte less should not succeed!
+        DevMode.dmSize--;
+        ok(!IsValidDevmodeA(&DevMode, DevMode.dmSize), "IsValidDevmodeA returns
TRUE!\n");
+
+        pTable++;
+    }
+    while (pTable->dwField);
 }
 
 START_TEST(IsValidDevmodeW)
 {
     DEVMODEW DevMode;
+    PMINIMUM_SIZE_TABLE pTable = MinimumSizeW;
 
     // Give no Devmode at all, this has to fail without crashing.
     SetLastError(0xDEADBEEF);
@@ -127,4 +252,55 @@
     SetLastError(0xDEADBEEF);
     ok(IsValidDevmodeW(&DevMode, sizeof(DEVMODEW) + 1), "IsValidDevmodeW returns
FALSE!\n");
     ok(GetLastError() == 0xDEADBEEF, "IsValidDevmodeW returns error %lu!\n",
GetLastError());
+
+    // dmSize must be a multiple of 4 if any dmDriverExtra is given.
+    for (DevMode.dmDriverExtra = 1; DevMode.dmDriverExtra <= 4;
DevMode.dmDriverExtra++)
+    {
+        for (DevMode.dmSize = sizeof(DEVMODEW); DevMode.dmSize < sizeof(DEVMODEW) + 4;
DevMode.dmSize++)
+        {
+            BOOL bExpected = (DevMode.dmSize % 4 == 0);
+            DWORD dwExpectedError = (bExpected ? 0xDEADBEEF : ERROR_INVALID_DATA);
+
+            SetLastError(0xDEADBEEF);
+            ok(IsValidDevmodeW(&DevMode, DevMode.dmSize + DevMode.dmDriverExtra) ==
bExpected, "IsValidDevmodeW returns %d!\n", !bExpected);
+            ok(GetLastError() == dwExpectedError, "IsValidDevmodeW returns error
%lu!\n", GetLastError());
+        }
+    }
+
+    // IsValidDevmodeW also fixes missing null-terminations if the corresponding fields
are used.
+    ZeroMemory(&DevMode, sizeof(DEVMODEW));
+    DevMode.dmSize = sizeof(DEVMODEW);
+    wmemset(DevMode.dmDeviceName, L'A', 32);
+    wmemset(DevMode.dmFormName, L'A', 32);
+    ok(IsValidDevmodeW(&DevMode, DevMode.dmSize), "IsValidDevmodeW returns
FALSE!\n");
+    ok(DevMode.dmDeviceName[31] == L'\0', "Expected dmDeviceName to be
'\\0', but is '%C'\n", DevMode.dmDeviceName[31]);
+    ok(DevMode.dmFormName[31] == L'A', "Expected dmFormName to be
'A', but is '%C'\n", DevMode.dmDeviceName[31]);
+
+    ZeroMemory(&DevMode, sizeof(DEVMODEW));
+    DevMode.dmSize = sizeof(DEVMODEW);
+    DevMode.dmFields = DM_FORMNAME;
+    wmemset(DevMode.dmDeviceName, L'A', 32);
+    wmemset(DevMode.dmFormName, L'A', 32);
+    ok(IsValidDevmodeW(&DevMode, DevMode.dmSize), "IsValidDevmodeW returns
FALSE!\n");
+    ok(DevMode.dmDeviceName[31] == L'\0', "Expected dmDeviceName to be
'\\0', but is '%C'\n", DevMode.dmDeviceName[31]);
+    ok(DevMode.dmFormName[31] == L'\0', "Expected dmFormName to be
'\\0', but is '%C'\n", DevMode.dmDeviceName[31]);
+
+    // Depending on which fields are given in dmFields, the minimum value for dmSize is
different.
+    ZeroMemory(&DevMode, sizeof(DEVMODEW));
+
+    do
+    {
+        DevMode.dmFields = pTable->dwField;
+        DevMode.dmSize = pTable->wSize;
+
+        // This size should succeed!
+        ok(IsValidDevmodeW(&DevMode, DevMode.dmSize), "IsValidDevmodeW returns
FALSE!\n");
+
+        // One byte less should not succeed!
+        DevMode.dmSize--;
+        ok(!IsValidDevmodeW(&DevMode, DevMode.dmSize), "IsValidDevmodeW returns
TRUE!\n");
+
+        pTable++;
+    }
+    while (pTable->dwField);
 }