Function Ext2UnicodeToMbs

Ext4Fsd/misc.c:121–179

}

ULONG
Ext2UnicodeToMbs (
    struct nls_table *  PageTable,
    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 = PageTable->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 = PageTable->uni2char(
                      Unicode->Buffer[i],
                      mbs,
                      0x10
                  );

            RtlCopyMemory(
                (PUCHAR)&(Mbs->Buffer[Mbs->Length]),
                &mbs[0],
                mbc
            );

            Mbs->Length += (USHORT)mbc;
        }
    }

    return Length;