Git conversion: Make reactos the root directory, move rosapps, rostests, wallpapers...

[reactos.git] / drivers / filesystems / reiserfs / src / misc.c

diff --git a/drivers/filesystems/reiserfs/src/misc.c b/drivers/filesystems/reiserfs/src/misc.c
new file mode 100644 (file)
index 0000000..387e6b1
--- /dev/null
+++ b/drivers/filesystems/reiserfs/src/misc.c
@@ -0,0 +1,281 @@
+/*
+ * COPYRIGHT:        GNU GENERAL PUBLIC LICENSE VERSION 2
+ * PROJECT:          ReiserFs file system driver for Windows NT/2000/XP/Vista.
+ * FILE:             misc.c
+ * PURPOSE:          
+ * PROGRAMMER:       Mark Piper, Matt Wu, Bo Brantén.
+ * HOMEPAGE:         
+ * UPDATE HISTORY: 
+ */
+
+/* INCLUDES *****************************************************************/
+
+#include "rfsd.h"
+
+/* GLOBALS ***************************************************************/
+
+extern PRFSD_GLOBAL RfsdGlobal;
+
+/* DEFINITIONS *************************************************************/
+
+#ifdef ALLOC_PRAGMA
+#pragma alloc_text(PAGE, RfsdLog2)
+#pragma alloc_text(PAGE, RfsdSysTime)
+#pragma alloc_text(PAGE, RfsdInodeTime)
+#pragma alloc_text(PAGE, RfsdOEMToUnicode)
+#pragma alloc_text(PAGE, RfsdUnicodeToOEM)
+#endif
+
+ULONG
+RfsdLog2(ULONG Value)
+{
+    ULONG Order = 0;
+
+    PAGED_CODE();
+
+    ASSERT(Value > 0);
+
+    while (Value) {
+        Order++;
+        Value >>= 1;
+    }
+
+    return (Order - 1);
+}
+
+LARGE_INTEGER
+RfsdSysTime (IN ULONG i_time)
+{
+    LARGE_INTEGER SysTime;
+
+    PAGED_CODE();
+
+    RtlSecondsSince1970ToTime(i_time, &SysTime);
+
+    return SysTime;
+}
+
+ULONG
+RfsdInodeTime (IN LARGE_INTEGER SysTime)
+{
+    ULONG   RfsdTime;
+
+    PAGED_CODE();
+
+    RtlTimeToSecondsSince1970(&SysTime, &RfsdTime);
+
+    return RfsdTime;
+}
+
+ULONG
+RfsdMbsToUnicode(
+    IN OUT PUNICODE_STRING Unicode,
+    IN     PANSI_STRING    Mbs   )
+{
+    ULONG Length = 0;
+    int i, mbc = 0;
+    WCHAR  uc;
+
+    /* Count the length of the resulting Unicode. */
+    for (i = 0; i < Mbs->Length; i += mbc) {
+
+        mbc = PAGE_TABLE->char2uni(
+                    (PUCHAR)&(Mbs->Buffer[i]),
+                    Mbs->Length - i,
+                    &uc
+                    );
+
+        if (mbc <= 0) {
+
+            /* Invalid character. */
+            return 0;
+        }
+
+        Length += 2;
+    }
+
+    if (Unicode) {
+        if (Unicode->MaximumLength < Length) {
+
+            DbgBreak();
+            return 0;
+        }
+
+        Unicode->Length = 0;
+        mbc = 0;
+
+        for (i = 0; i < Mbs->Length; i += mbc) {
+
+            mbc = PAGE_TABLE->char2uni(
+                    (PUCHAR)&(Mbs->Buffer[i]),
+                    Mbs->Length - i,
+                    &uc
+                    );
+            Unicode->Buffer[Unicode->Length/2] = uc;
+
+            Unicode->Length += 2;
+        }
+    }
+
+    return Length;
+}
+
+ULONG
+RfsdUnicodeToMbs (
+         IN OUT PANSI_STRING Mbs,
+         IN PUNICODE_STRING  Unicode)
+{
+    ULONG Length = 0;
+    UCHAR mbs[0x10];
+    int i, mbc;
+
+    /* Count the length of the resulting mbc-8. */
+    for (i = 0; i < (Unicode->Length / 2); i++) {
+
+        RtlZeroMemory(mbs, 0x10);
+        mbc = PAGE_TABLE->uni2char(
+                    Unicode->Buffer[i],
+                    mbs,
+                    0x10
+                    );
+
+        if (mbc <= 0) {
+
+            /* Invalid character. */
+            return 0;
+        }
+
+        Length += mbc;
+    }
+
+    if (Mbs) {
+
+        if (Mbs->MaximumLength < Length) {
+
+            DbgBreak();
+            return 0;
+        }
+
+        Mbs->Length = 0;
+
+        for (i = 0; i < (Unicode->Length / 2); i++) {
+
+            mbc = PAGE_TABLE->uni2char(
+                    Unicode->Buffer[i],
+                    mbs,
+                    0x10
+                    );
+
+            RtlCopyMemory(
+                    (PUCHAR)&(Mbs->Buffer[Mbs->Length]),
+                    &mbs[0],
+                    mbc
+                    );
+
+            Mbs->Length += (USHORT)mbc;
+        }
+    }
+
+    return Length;
+}
+
+ULONG
+RfsdOEMToUnicodeSize(
+        IN PANSI_STRING Oem
+        )
+{
+    if (PAGE_TABLE) {
+        return RfsdMbsToUnicode(NULL, Oem);
+    }
+
+    return RtlOemStringToCountedUnicodeSize(Oem);
+}
+
+NTSTATUS
+RfsdOEMToUnicode(
+         IN OUT PUNICODE_STRING Unicode,
+         IN     POEM_STRING     Oem    )
+{
+    NTSTATUS  Status;
+
+    PAGED_CODE();
+
+    if (PAGE_TABLE) {
+        Status = RfsdMbsToUnicode(Unicode, Oem);
+
+        if (Status == Unicode->Length) {
+            Status = STATUS_SUCCESS;
+        } else {
+            Status = STATUS_UNSUCCESSFUL;
+        }
+
+        goto errorout;
+    }
+
+
+    Status = RtlOemStringToUnicodeString(
+                    Unicode, 
+                    Oem,
+                    FALSE );
+
+    if (!NT_SUCCESS(Status))
+    {
+        DbgBreak();
+        goto errorout;
+    }
+
+errorout:
+
+    return Status;
+}
+
+ULONG
+RfsdUnicodeToOEMSize(
+        IN PUNICODE_STRING Unicode
+        )
+{
+    if (PAGE_TABLE) {
+
+        return RfsdUnicodeToMbs(NULL, Unicode);
+    }
+
+    return RtlxUnicodeStringToOemSize(Unicode);
+}
+
+NTSTATUS
+RfsdUnicodeToOEM (
+         IN OUT POEM_STRING Oem,
+         IN PUNICODE_STRING Unicode)
+{
+    NTSTATUS Status;
+
+    PAGED_CODE();
+
+    if (PAGE_TABLE) {
+
+        Status = RfsdUnicodeToMbs(Oem, Unicode);
+
+        if (Status == Oem->Length) {
+            Status = STATUS_SUCCESS;
+        } else {
+            Status = STATUS_UNSUCCESSFUL;
+        }
+
+        goto errorout;
+    }
+
+    Status = RtlUnicodeStringToOemString(
+                            Oem,
+                            Unicode,
+                            FALSE );
+
+    if (!NT_SUCCESS(Status))
+    {
+        DbgBreak();
+        goto errorout;
+    }
+    
+errorout:
+
+    return Status;
+}