[FREELDR]

[reactos.git] / reactos / boot / freeldr / freeldr / fs / fat.c

diff --git a/reactos/boot/freeldr/freeldr/fs/fat.c b/reactos/boot/freeldr/freeldr/fs/fat.c
index a97cdcb..53e3beb 100644 (file)
--- a/reactos/boot/freeldr/freeldr/fs/fat.c
+++ b/reactos/boot/freeldr/freeldr/fs/fat.c
@@ -23,7 +23,7 @@
 #define NDEBUG
 #include <debug.h>
 
-ULONG  FatDetermineFatType(PFAT_BOOTSECTOR FatBootSector, ULONG PartitionSectorCount);
+ULONG  FatDetermineFatType(PFAT_BOOTSECTOR FatBootSector, ULONGLONG PartitionSectorCount);
 PVOID  FatBufferDirectory(PFAT_VOLUME_INFO Volume, ULONG DirectoryStartCluster, ULONG* EntryCountPointer, BOOLEAN RootDirectory);
 BOOLEAN        FatSearchDirectoryBufferForFile(PFAT_VOLUME_INFO Volume, PVOID DirectoryBuffer, ULONG EntryCount, PCHAR FileName, PFAT_FILE_INFO FatFileInfoPointer);
 LONG FatLookupFile(PFAT_VOLUME_INFO Volume, PCSTR FileName, ULONG DeviceId, PFAT_FILE_INFO FatFileInfoPointer);
@@ -263,8 +263,8 @@ BOOLEAN FatOpenVolume(PFAT_VOLUME_INFO Volume, PFAT_BOOTSECTOR BootSector, ULONG
                Volume->FatSectorStart = (4096 / Volume->BytesPerSector);
                Volume->ActiveFatSectorStart = Volume->FatSectorStart;
                Volume->NumberOfFats = 1;
-               FatSize = PartitionSectorCount / Volume->SectorsPerCluster *
-                         (Volume->FatType == FATX16 ? 2 : 4);
+               FatSize = (ULONG)(PartitionSectorCount / Volume->SectorsPerCluster *
+                         (Volume->FatType == FATX16 ? 2 : 4));
                Volume->SectorsPerFat = (((FatSize + 4095) / 4096) * 4096) / Volume->BytesPerSector;
 
                Volume->RootDirSectorStart = Volume->FatSectorStart + Volume->NumberOfFats * Volume->SectorsPerFat;
@@ -313,7 +313,7 @@ BOOLEAN FatOpenVolume(PFAT_VOLUME_INFO Volume, PFAT_BOOTSECTOR BootSector, ULONG
        return TRUE;
 }
 
-ULONG FatDetermineFatType(PFAT_BOOTSECTOR FatBootSector, ULONG PartitionSectorCount)
+ULONG FatDetermineFatType(PFAT_BOOTSECTOR FatBootSector, ULONGLONG PartitionSectorCount)
 {
        ULONG                   RootDirSectors;
        ULONG                   DataSectorCount;
@@ -325,7 +325,7 @@ ULONG FatDetermineFatType(PFAT_BOOTSECTOR FatBootSector, ULONG PartitionSectorCo
 
        if (0 == strncmp(FatXBootSector->FileSystemType, "FATX", 4))
        {
-               CountOfClusters = PartitionSectorCount / FatXBootSector->SectorsPerCluster;
+               CountOfClusters = (ULONG)(PartitionSectorCount / FatXBootSector->SectorsPerCluster);
                if (CountOfClusters < 65525)
                {
                        /* Volume is FATX16 */