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/*++
Copyright (c) 1991 Microsoft Corporation
Module Name:
error.c
Abstract:
This module contains a routine for converting NT status codes
to DOS/OS|2 error codes.
Author:
David Treadwell (davidtr) 04-Apr-1991
Revision History:
--*/
#include <ntrtlp.h>
#include "winerror.h"
#include "error.h"
#if defined(ALLOC_PRAGMA) && defined(NTOS_KERNEL_RUNTIME)
#pragma alloc_text(PAGE, RtlNtStatusToDosError)
#endif
//
// Ensure that the Registry ERROR_SUCCESS error code and the
// NO_ERROR error code remain equal and zero.
//
#if ERROR_SUCCESS != 0 || NO_ERROR != 0
#error Invalid value for ERROR_SUCCESS.
#endif
ULONG
RtlNtStatusToDosError (
IN NTSTATUS Status
)
/*++
Routine Description:
This routine converts an NT status code to its DOS/OS|2 equivalent.
Remembers the Status code value in the TEB.
Arguments:
Status - Supplies the status value to convert.
Return Value:
The matching DOS/OS|2 error code.
--*/
{
PTEB Teb;
Teb = NtCurrentTeb();
if ( Teb ) {
Teb->LastStatusValue = Status;
}
return RtlNtStatusToDosErrorNoTeb( Status );
}
ULONG
RtlNtStatusToDosErrorNoTeb (
IN NTSTATUS Status
)
/*++
Routine Description:
This routine converts an NT status code to its DOS/OS 2 equivalent
and returns the translated value.
Arguments:
Status - Supplies the status value to convert.
Return Value:
The matching DOS/OS 2 error code.
--*/
{
ULONG Offset;
ULONG Entry;
ULONG Index;
//
// Convert any HRESULTs to their original form of a NTSTATUS or a
// WIN32 error
//
if (Status & 0x20000000) {
//
// The customer bit is set so lets just pass the
// error code on thru
//
return Status;
}
else if ((Status & 0xffff0000) == 0x80070000) {
//
// The status code was a win32 error already.
//
return(Status & 0x0000ffff);
}
else if ((Status & 0xf0000000) == 0xd0000000) {
//
// The status code is a HRESULT from NTSTATUS
//
Status &= 0xcfffffff;
}
//
// Scan the run length table and compute the entry in the translation
// table that maps the specified status code to a DOS error code.
//
Entry = 0;
Index = 0;
do {
if ((ULONG)Status >= RtlpRunTable[Entry + 1].BaseCode) {
Index += (RtlpRunTable[Entry].RunLength * RtlpRunTable[Entry].CodeSize);
} else {
Offset = (ULONG)Status - RtlpRunTable[Entry].BaseCode;
if (Offset >= RtlpRunTable[Entry].RunLength) {
break;
} else {
Index += (Offset * (ULONG)RtlpRunTable[Entry].CodeSize);
if (RtlpRunTable[Entry].CodeSize == 1) {
return (ULONG)RtlpStatusTable[Index];
} else {
return (((ULONG)RtlpStatusTable[Index + 1] << 16) |
(ULONG)RtlpStatusTable[Index]);
}
}
}
Entry += 1;
} while (Entry < (sizeof(RtlpRunTable) / sizeof(RUN_ENTRY)));
//
// The translation to a DOS error code failed.
//
// The redirector maps unknown OS/2 error codes by ORing 0xC001 into
// the high 16 bits. Detect this and return the low 16 bits if true.
//
if (((ULONG)Status >> 16) == 0xC001) {
return ((ULONG)Status & 0xFFFF);
}
#ifndef NTOS_KERNEL_RUNTIME
DbgPrint("RTL: RtlNtStatusToDosError(0x%lx): No Valid Win32 Error Mapping\n",Status);
DbgPrint("RTL: Edit ntos\\rtl\\generr.c to correct the problem\n");
DbgPrint("RTL: ERROR_MR_MID_NOT_FOUND is being returned\n");
#if DBG
if (NtCurrentPeb()->BeingDebugged) {
DbgBreakPoint();
}
#endif // DBG
#endif // NTOS_KERNEL_RUNTIME
return ERROR_MR_MID_NOT_FOUND;
}
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