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Refine the logic to handle the device path info get from string token.

Browse Source 
Signed-off-by: Eric Dong <eric.dong@intel.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@13632 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
ydong10
2012-08-14 09:52:25 +00:00
parent d0bf562330
commit 33efdf51b0
4 changed files with 121 additions and 40 deletions
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48
MdeModulePkg/Universal/DriverSampleDxe/DriverSample.c
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@ -1766,6 +1766,44 @@ DriverCallback (
return Status;
}
/**
Transfer the binary device path to string.
@param DevicePath The device path info.
@retval Device path string info.
**/
CHAR16 *
GenerateDevicePathString (
EFI_DEVICE_PATH_PROTOCOL *DevicePath
)
{
CHAR16 *String;
CHAR16 *TmpBuf;
UINTN Index;
UINT8 *Buffer;
UINTN DevicePathSize;
//
// Compute the size of the device path in bytes
//
DevicePathSize = GetDevicePathSize (DevicePath);
String = AllocateZeroPool ((DevicePathSize * 2 + 1) * sizeof (CHAR16));
if (String == NULL) {
return NULL;
}
TmpBuf = String;
for (Index = 0, Buffer = (UINT8 *)DevicePath; Index < DevicePathSize; Index++) {
TmpBuf += UnicodeValueToString (TmpBuf, PREFIX_ZERO | RADIX_HEX, *(Buffer++), 2);
}
return String;
}
/**
Main entry for this driver.
@ -1802,6 +1840,8 @@ DriverSampleInit (
// Initialize the local variables.
//
ConfigRequestHdr = NULL;
NewString = NULL;
//
// Initialize screen dimensions for SendForm().
// Remove 3 characters from top and bottom
@ -1921,11 +1961,15 @@ DriverSampleInit (
//
// Update the device path string.
//
if (HiiSetString (HiiHandle[0], STRING_TOKEN (STR_DEVICE_PATH), (EFI_STRING) &mHiiVendorDevicePath0, NULL) == 0) {
NewString = GenerateDevicePathString((EFI_DEVICE_PATH_PROTOCOL*)&mHiiVendorDevicePath0);
if (HiiSetString (HiiHandle[0], STRING_TOKEN (STR_DEVICE_PATH), NewString, NULL) == 0) {
DriverSampleUnload (ImageHandle);
return EFI_OUT_OF_RESOURCES;
}
if (NewString != NULL) {
FreePool (NewString);
}
//
// Very simple example of how one would update a string that is already
// in the HII database