/*
 * NT basis DLL
 *
 * This file contains the Nt* API functions of NTDLL.DLL.
 * In the original ntdll.dll they all seem to just call int 0x2e (down to the NTOSKRNL)
 *
 * Copyright 1996-1998 Marcus Meissner
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
 */

#include "config.h"

#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif

#include "ntstatus.h"
#define WIN32_NO_STATUS
#include "wine/debug.h"
#include "windef.h"
#include "winternl.h"
#include "ntdll_misc.h"
#include "wine/server.h"

WINE_DEFAULT_DEBUG_CHANNEL(ntdll);

static ULONG execute_flags = MEM_EXECUTE_OPTION_DISABLE;

/*
 *	Process object
 */

/******************************************************************************
 *  NtTerminateProcess			[NTDLL.@]
 *
 *  Native applications must kill themselves when done
 */
NTSTATUS WINAPI NtTerminateProcess( HANDLE handle, LONG exit_code )
{
    NTSTATUS ret;
    BOOL self;
    SERVER_START_REQ( terminate_process )
    {
        req->handle    = wine_server_obj_handle( handle );
        req->exit_code = exit_code;
        ret = wine_server_call( req );
        self = !ret && reply->self;
    }
    SERVER_END_REQ;
    if (self && handle) _exit( exit_code );
    return ret;
}

/******************************************************************************
 *  RtlGetCurrentPeb  [NTDLL.@]
 *
 */
PEB * WINAPI RtlGetCurrentPeb(void)
{
    return NtCurrentTeb()->Peb;
}

/***********************************************************************
 *           __wine_make_process_system   (NTDLL.@)
 *
 * Mark the current process as a system process.
 * Returns the event that is signaled when all non-system processes have exited.
 */
HANDLE CDECL __wine_make_process_system(void)
{
    HANDLE ret = 0;
    SERVER_START_REQ( make_process_system )
    {
        if (!wine_server_call( req )) ret = wine_server_ptr_handle( reply->event );
    }
    SERVER_END_REQ;
    return ret;
}

static UINT process_error_mode;

#define UNIMPLEMENTED_INFO_CLASS(c) \
    case c: \
        FIXME("(process=%p) Unimplemented information class: " #c "\n", ProcessHandle); \
        ret = STATUS_INVALID_INFO_CLASS; \
        break

ULONG_PTR get_system_affinity_mask(void)
{
    ULONG num_cpus = NtCurrentTeb()->Peb->NumberOfProcessors;
    if (num_cpus >= sizeof(ULONG_PTR) * 8) return ~(ULONG_PTR)0;
    return ((ULONG_PTR)1 << num_cpus) - 1;
}

/******************************************************************************
*  NtQueryInformationProcess		[NTDLL.@]
*  ZwQueryInformationProcess		[NTDLL.@]
*
*/
NTSTATUS WINAPI NtQueryInformationProcess(
	IN HANDLE ProcessHandle,
	IN PROCESSINFOCLASS ProcessInformationClass,
	OUT PVOID ProcessInformation,
	IN ULONG ProcessInformationLength,
	OUT PULONG ReturnLength)
{
    NTSTATUS ret = STATUS_SUCCESS;
    ULONG len = 0;

    TRACE("(%p,0x%08x,%p,0x%08x,%p)\n",
          ProcessHandle,ProcessInformationClass,
          ProcessInformation,ProcessInformationLength,
          ReturnLength);

    switch (ProcessInformationClass) 
    {
    UNIMPLEMENTED_INFO_CLASS(ProcessQuotaLimits);
    UNIMPLEMENTED_INFO_CLASS(ProcessBasePriority);
    UNIMPLEMENTED_INFO_CLASS(ProcessRaisePriority);
    UNIMPLEMENTED_INFO_CLASS(ProcessExceptionPort);
    UNIMPLEMENTED_INFO_CLASS(ProcessAccessToken);
    UNIMPLEMENTED_INFO_CLASS(ProcessLdtInformation);
    UNIMPLEMENTED_INFO_CLASS(ProcessLdtSize);
    UNIMPLEMENTED_INFO_CLASS(ProcessIoPortHandlers);
    UNIMPLEMENTED_INFO_CLASS(ProcessPooledUsageAndLimits);
    UNIMPLEMENTED_INFO_CLASS(ProcessWorkingSetWatch);
    UNIMPLEMENTED_INFO_CLASS(ProcessUserModeIOPL);
    UNIMPLEMENTED_INFO_CLASS(ProcessEnableAlignmentFaultFixup);
    UNIMPLEMENTED_INFO_CLASS(ProcessPriorityClass);
    UNIMPLEMENTED_INFO_CLASS(ProcessWx86Information);
    UNIMPLEMENTED_INFO_CLASS(ProcessPriorityBoost);
    UNIMPLEMENTED_INFO_CLASS(ProcessDeviceMap);
    UNIMPLEMENTED_INFO_CLASS(ProcessSessionInformation);
    UNIMPLEMENTED_INFO_CLASS(ProcessForegroundInformation);
    UNIMPLEMENTED_INFO_CLASS(ProcessLUIDDeviceMapsEnabled);
    UNIMPLEMENTED_INFO_CLASS(ProcessBreakOnTermination);
    UNIMPLEMENTED_INFO_CLASS(ProcessHandleTracing);

    case ProcessBasicInformation:
        {
            PROCESS_BASIC_INFORMATION pbi;
            const ULONG_PTR affinity_mask = get_system_affinity_mask();

            if (ProcessInformationLength >= sizeof(PROCESS_BASIC_INFORMATION))
            {
                if (!ProcessInformation)
                    ret = STATUS_ACCESS_VIOLATION;
                else if (!ProcessHandle)
                    ret = STATUS_INVALID_HANDLE;
                else
                {
                    SERVER_START_REQ(get_process_info)
                    {
                        req->handle = wine_server_obj_handle( ProcessHandle );
                        if ((ret = wine_server_call( req )) == STATUS_SUCCESS)
                        {
                            pbi.ExitStatus = reply->exit_code;
                            pbi.PebBaseAddress = wine_server_get_ptr( reply->peb );
                            pbi.AffinityMask = reply->affinity & affinity_mask;
                            pbi.BasePriority = reply->priority;
                            pbi.UniqueProcessId = reply->pid;
                            pbi.InheritedFromUniqueProcessId = reply->ppid;
                        }
                    }
                    SERVER_END_REQ;

                    memcpy(ProcessInformation, &pbi, sizeof(PROCESS_BASIC_INFORMATION));

                    len = sizeof(PROCESS_BASIC_INFORMATION);
                }

                if (ProcessInformationLength > sizeof(PROCESS_BASIC_INFORMATION))
                    ret = STATUS_INFO_LENGTH_MISMATCH;
            }
            else
            {
                len = sizeof(PROCESS_BASIC_INFORMATION);
                ret = STATUS_INFO_LENGTH_MISMATCH;
            }
        }
        break;
    case ProcessIoCounters:
        {
            IO_COUNTERS pii;

            if (ProcessInformationLength >= sizeof(IO_COUNTERS))
            {
                if (!ProcessInformation)
                    ret = STATUS_ACCESS_VIOLATION;
                else if (!ProcessHandle)
                    ret = STATUS_INVALID_HANDLE;
                else
                {
                    /* FIXME : real data */
                    memset(&pii, 0 , sizeof(IO_COUNTERS));

                    memcpy(ProcessInformation, &pii, sizeof(IO_COUNTERS));

                    len = sizeof(IO_COUNTERS);
                }

                if (ProcessInformationLength > sizeof(IO_COUNTERS))
                    ret = STATUS_INFO_LENGTH_MISMATCH;
            }
            else
            {
                len = sizeof(IO_COUNTERS);
                ret = STATUS_INFO_LENGTH_MISMATCH;
            }
        }
        break;
    case ProcessVmCounters:
        {
            VM_COUNTERS pvmi;

            /* older Windows versions don't have the PrivatePageCount field */
            if (ProcessInformationLength >= FIELD_OFFSET(VM_COUNTERS,PrivatePageCount))
            {
                if (!ProcessInformation)
                    ret = STATUS_ACCESS_VIOLATION;
                else if (!ProcessHandle)
                    ret = STATUS_INVALID_HANDLE;
                else
                {
                    /* FIXME : real data */
                    memset(&pvmi, 0 , sizeof(VM_COUNTERS));

                    len = ProcessInformationLength;
                    if (len != FIELD_OFFSET(VM_COUNTERS,PrivatePageCount)) len = sizeof(VM_COUNTERS);

                    memcpy(ProcessInformation, &pvmi, min(ProcessInformationLength,sizeof(VM_COUNTERS)));
                }

                if (ProcessInformationLength != FIELD_OFFSET(VM_COUNTERS,PrivatePageCount) &&
                    ProcessInformationLength != sizeof(VM_COUNTERS))
                    ret = STATUS_INFO_LENGTH_MISMATCH;
            }
            else
            {
                len = sizeof(pvmi);
                ret = STATUS_INFO_LENGTH_MISMATCH;
            }
        }
        break;
    case ProcessTimes:
        {
            KERNEL_USER_TIMES pti;

            if (ProcessInformationLength >= sizeof(KERNEL_USER_TIMES))
            {
                if (!ProcessInformation)
                    ret = STATUS_ACCESS_VIOLATION;
                else if (!ProcessHandle)
                    ret = STATUS_INVALID_HANDLE;
                else
                {
                    /* FIXME : User- and KernelTime have to be implemented */
                    memset(&pti, 0, sizeof(KERNEL_USER_TIMES));

                    SERVER_START_REQ(get_process_info)
                    {
                      req->handle = wine_server_obj_handle( ProcessHandle );
                      if ((ret = wine_server_call( req )) == STATUS_SUCCESS)
                      {
                          pti.CreateTime.QuadPart = reply->start_time;
                          pti.ExitTime.QuadPart = reply->end_time;
                      }
                    }
                    SERVER_END_REQ;

                    memcpy(ProcessInformation, &pti, sizeof(KERNEL_USER_TIMES));
                    len = sizeof(KERNEL_USER_TIMES);
                }

                if (ProcessInformationLength > sizeof(KERNEL_USER_TIMES))
                    ret = STATUS_INFO_LENGTH_MISMATCH;
            }
            else
            {
                len = sizeof(KERNEL_USER_TIMES);
                ret = STATUS_INFO_LENGTH_MISMATCH;
            }
        }
        break;
    case ProcessDebugPort:
        len = sizeof(DWORD_PTR);
        if (ProcessInformationLength == len)
        {
            if (!ProcessInformation)
                ret = STATUS_ACCESS_VIOLATION;
            else if (!ProcessHandle)
                ret = STATUS_INVALID_HANDLE;
            else
            {
                SERVER_START_REQ(get_process_info)
                {
                    req->handle = wine_server_obj_handle( ProcessHandle );
                    if ((ret = wine_server_call( req )) == STATUS_SUCCESS)
                    {
                        *(DWORD_PTR *)ProcessInformation = reply->debugger_present ? ~(DWORD_PTR)0 : 0;
                    }
                }
                SERVER_END_REQ;
            }
        }
        else
            ret = STATUS_INFO_LENGTH_MISMATCH;
        break;
    case ProcessDebugFlags:
        len = sizeof(DWORD);
        if (ProcessInformationLength == len)
        {
            if (!ProcessInformation)
                ret = STATUS_ACCESS_VIOLATION;
            else if (!ProcessHandle)
                ret = STATUS_INVALID_HANDLE;
            else
            {
                SERVER_START_REQ(get_process_info)
                {
                    req->handle = wine_server_obj_handle( ProcessHandle );
                    if ((ret = wine_server_call( req )) == STATUS_SUCCESS)
                    {
                        *(DWORD *)ProcessInformation = !reply->debugger_present;
                    }
                }
                SERVER_END_REQ;
            }
        }
        else
            ret = STATUS_INFO_LENGTH_MISMATCH;
        break;
    case ProcessDefaultHardErrorMode:
        len = sizeof(process_error_mode);
        if (ProcessInformationLength == len)
            memcpy(ProcessInformation, &process_error_mode, len);
        else
            ret = STATUS_INFO_LENGTH_MISMATCH;
        break;
    case ProcessDebugObjectHandle:
        /* "These are not the debuggers you are looking for." *
         * set it to 0 aka "no debugger" to satisfy copy protections */
        len = sizeof(HANDLE);
        if (ProcessInformationLength == len)
        {
            if (!ProcessInformation)
                ret = STATUS_ACCESS_VIOLATION;
            else if (!ProcessHandle)
                ret = STATUS_INVALID_HANDLE;
            else
            {
                memset(ProcessInformation, 0, ProcessInformationLength);
                ret = STATUS_PORT_NOT_SET;
            }
        }
        else
            ret = STATUS_INFO_LENGTH_MISMATCH;
        break;
    case ProcessHandleCount:
        if (ProcessInformationLength >= 4)
        {
            if (!ProcessInformation)
                ret = STATUS_ACCESS_VIOLATION;
            else if (!ProcessHandle)
                ret = STATUS_INVALID_HANDLE;
            else
            {
                memset(ProcessInformation, 0, 4);
                len = 4;
            }

            if (ProcessInformationLength > 4)
                ret = STATUS_INFO_LENGTH_MISMATCH;
        }
        else
        {
            len = 4;
            ret = STATUS_INFO_LENGTH_MISMATCH;
        }
        break;

    case ProcessAffinityMask:
        len = sizeof(ULONG_PTR);
        if (ProcessInformationLength == len)
        {
            const ULONG_PTR system_mask = get_system_affinity_mask();

            SERVER_START_REQ(get_process_info)
            {
                req->handle = wine_server_obj_handle( ProcessHandle );
                if (!(ret = wine_server_call( req )))
                    *(ULONG_PTR *)ProcessInformation = reply->affinity & system_mask;
            }
            SERVER_END_REQ;
        }
        else ret = STATUS_INFO_LENGTH_MISMATCH;
        break;

    case ProcessWow64Information:
        len = sizeof(ULONG_PTR);
        if (ProcessInformationLength != len) ret = STATUS_INFO_LENGTH_MISMATCH;
        else if (!ProcessInformation) ret = STATUS_ACCESS_VIOLATION;
        else if(!ProcessHandle) ret = STATUS_INVALID_HANDLE;
        else
        {
            ULONG_PTR val = 0;

            if (ProcessHandle == GetCurrentProcess()) val = is_wow64;
            else if (server_cpus & ((1 << CPU_x86_64) | (1 << CPU_ARM64)))
            {
                SERVER_START_REQ( get_process_info )
                {
                    req->handle = wine_server_obj_handle( ProcessHandle );
                    if (!(ret = wine_server_call( req )))
                        val = (reply->cpu != CPU_x86_64 && reply->cpu != CPU_ARM64);
                }
                SERVER_END_REQ;
            }
            *(ULONG_PTR *)ProcessInformation = val;
        }
        break;
    case ProcessImageFileName:
        /* FIXME: this will return a DOS path. Windows returns an NT path. Changing this would require also changing kernel32.QueryFullProcessImageName.
         * The latter may be harder because of the lack of RtlNtPathNameToDosPathName. */
        SERVER_START_REQ(get_dll_info)
        {
            UNICODE_STRING *image_file_name_str = ProcessInformation;

            req->handle = wine_server_obj_handle( ProcessHandle );
            req->base_address = 0; /* main module */
            wine_server_set_reply( req, image_file_name_str ? image_file_name_str + 1 : NULL,
                                   ProcessInformationLength > sizeof(UNICODE_STRING) ? ProcessInformationLength - sizeof(UNICODE_STRING) : 0 );
            ret = wine_server_call( req );
            if (ret == STATUS_BUFFER_TOO_SMALL) ret = STATUS_INFO_LENGTH_MISMATCH;

            len = sizeof(UNICODE_STRING) + reply->filename_len;
            if (ret == STATUS_SUCCESS)
            {
                image_file_name_str->MaximumLength = image_file_name_str->Length = reply->filename_len;
                image_file_name_str->Buffer = (PWSTR)(image_file_name_str + 1);
            }
        }
        SERVER_END_REQ;
        break;
    case ProcessExecuteFlags:
        len = sizeof(ULONG);
        if (ProcessInformationLength == len)
            *(ULONG *)ProcessInformation = execute_flags;
        else
            ret = STATUS_INFO_LENGTH_MISMATCH;
        break;
    default:
        FIXME("(%p,info_class=%d,%p,0x%08x,%p) Unknown information class\n",
              ProcessHandle,ProcessInformationClass,
              ProcessInformation,ProcessInformationLength,
              ReturnLength);
        ret = STATUS_INVALID_INFO_CLASS;
        break;
    }

    if (ReturnLength) *ReturnLength = len;
    
    return ret;
}

/******************************************************************************
 * NtSetInformationProcess [NTDLL.@]
 * ZwSetInformationProcess [NTDLL.@]
 */
NTSTATUS WINAPI NtSetInformationProcess(
	IN HANDLE ProcessHandle,
	IN PROCESSINFOCLASS ProcessInformationClass,
	IN PVOID ProcessInformation,
	IN ULONG ProcessInformationLength)
{
    NTSTATUS ret = STATUS_SUCCESS;

    switch (ProcessInformationClass)
    {
    case ProcessDefaultHardErrorMode:
        if (ProcessInformationLength != sizeof(UINT)) return STATUS_INVALID_PARAMETER;
        process_error_mode = *(UINT *)ProcessInformation;
        break;
    case ProcessAffinityMask:
    {
        const ULONG_PTR system_mask = get_system_affinity_mask();

        if (ProcessInformationLength != sizeof(DWORD_PTR)) return STATUS_INVALID_PARAMETER;
        if (*(PDWORD_PTR)ProcessInformation & ~system_mask)
            return STATUS_INVALID_PARAMETER;
        if (!*(PDWORD_PTR)ProcessInformation)
            return STATUS_INVALID_PARAMETER;
        SERVER_START_REQ( set_process_info )
        {
            req->handle   = wine_server_obj_handle( ProcessHandle );
            req->affinity = *(PDWORD_PTR)ProcessInformation;
            req->mask     = SET_PROCESS_INFO_AFFINITY;
            ret = wine_server_call( req );
        }
        SERVER_END_REQ;
        break;
    }
    case ProcessPriorityClass:
        if (ProcessInformationLength != sizeof(PROCESS_PRIORITY_CLASS))
            return STATUS_INVALID_PARAMETER;
        else
        {
            PROCESS_PRIORITY_CLASS* ppc = ProcessInformation;

            SERVER_START_REQ( set_process_info )
            {
                req->handle   = wine_server_obj_handle( ProcessHandle );
                /* FIXME Foreground isn't used */
                req->priority = ppc->PriorityClass;
                req->mask     = SET_PROCESS_INFO_PRIORITY;
                ret = wine_server_call( req );
            }
            SERVER_END_REQ;
        }
        break;

    case ProcessExecuteFlags:
        if (ProcessInformationLength != sizeof(ULONG))
            return STATUS_INVALID_PARAMETER;
        else if (execute_flags & MEM_EXECUTE_OPTION_PERMANENT)
            return STATUS_ACCESS_DENIED;
        else
        {
            BOOL enable;
            switch (*(ULONG *)ProcessInformation & (MEM_EXECUTE_OPTION_ENABLE|MEM_EXECUTE_OPTION_DISABLE))
            {
            case MEM_EXECUTE_OPTION_ENABLE:
                enable = TRUE;
                break;
            case MEM_EXECUTE_OPTION_DISABLE:
                enable = FALSE;
                break;
            default:
                return STATUS_INVALID_PARAMETER;
            }
            execute_flags = *(ULONG *)ProcessInformation;
            VIRTUAL_SetForceExec( enable );
        }
        break;

    default:
        FIXME("(%p,0x%08x,%p,0x%08x) stub\n",
              ProcessHandle,ProcessInformationClass,ProcessInformation,
              ProcessInformationLength);
        ret = STATUS_NOT_IMPLEMENTED;
        break;
    }
    return ret;
}

/******************************************************************************
 * NtFlushInstructionCache [NTDLL.@]
 * ZwFlushInstructionCache [NTDLL.@]
 */
NTSTATUS WINAPI NtFlushInstructionCache(
        IN HANDLE ProcessHandle,
        IN LPCVOID BaseAddress,
        IN SIZE_T Size)
{
    static int once;
    if (!once++)
    {
#if defined(__x86_64__) || defined(__i386__)
        TRACE("%p %p %ld - no-op on x86 and x86_64\n", ProcessHandle, BaseAddress, Size );
#else
        FIXME("%p %p %ld\n", ProcessHandle, BaseAddress, Size );
#endif
    }
    return STATUS_SUCCESS;
}

/******************************************************************
 *		NtOpenProcess [NTDLL.@]
 *		ZwOpenProcess [NTDLL.@]
 */
NTSTATUS  WINAPI NtOpenProcess(PHANDLE handle, ACCESS_MASK access,
                               const OBJECT_ATTRIBUTES* attr, const CLIENT_ID* cid)
{
    NTSTATUS    status;

    SERVER_START_REQ( open_process )
    {
        req->pid        = HandleToULong(cid->UniqueProcess);
        req->access     = access;
        req->attributes = attr ? attr->Attributes : 0;
        status = wine_server_call( req );
        if (!status) *handle = wine_server_ptr_handle( reply->handle );
    }
    SERVER_END_REQ;
    return status;
}