/*++

Copyright (c) 1991  Microsoft Corporation

Module Name:

    message.c

Abstract:

    Message table resource accessing functions

Author:

    Steve Wood (stevewo) 10-Sep-1991

Revision History:

--*/

#include "ntrtlp.h"
#include "string.h"
#include "stdio.h"

#if defined(ALLOC_PRAGMA) && defined(NTOS_KERNEL_RUNTIME)
#pragma alloc_text(PAGE,RtlFindMessage)
#endif

NTSTATUS
RtlFindMessage(
    IN PVOID DllHandle,
    IN ULONG MessageTableId,
    IN ULONG MessageLanguageId,
    IN ULONG MessageId,
    OUT PMESSAGE_RESOURCE_ENTRY *MessageEntry
    )
{
    NTSTATUS Status;
    ULONG NumberOfBlocks;
    ULONG EntryIndex;
    PIMAGE_RESOURCE_DATA_ENTRY ResourceDataEntry;
    PMESSAGE_RESOURCE_DATA  MessageData;
    PMESSAGE_RESOURCE_BLOCK MessageBlock;
    PCHAR s;
    ULONG ResourceIdPath[ 3 ];

    RTL_PAGED_CODE();

    ResourceIdPath[ 0 ] = MessageTableId;
    ResourceIdPath[ 1 ] = 1;
    ResourceIdPath[ 2 ] = MessageLanguageId;

    Status = LdrpSearchResourceSection_U( DllHandle,
                                          ResourceIdPath,
                                          3,
                                          FALSE,
                                          (PVOID *)&ResourceDataEntry
                                        );
    if (!NT_SUCCESS( Status )) {
        return( Status );
        }

    Status = LdrpAccessResourceData( DllHandle,
                                     ResourceDataEntry,
                                     (PVOID *)&MessageData,
                                     NULL
                                   );
    if (!NT_SUCCESS( Status )) {
        return( Status );
        }

    NumberOfBlocks = MessageData->NumberOfBlocks;
    MessageBlock = &MessageData->Blocks[ 0 ];
    while (NumberOfBlocks--) {
        if (MessageId >= MessageBlock->LowId &&
            MessageId <= MessageBlock->HighId
           ) {
            s = (PCHAR)MessageData + MessageBlock->OffsetToEntries;
            EntryIndex = MessageId - MessageBlock->LowId;
            while (EntryIndex--) {
                s += ((PMESSAGE_RESOURCE_ENTRY)s)->Length;
                }

            *MessageEntry = (PMESSAGE_RESOURCE_ENTRY)s;
            return( STATUS_SUCCESS );
            }

        MessageBlock++;
        }

    return( STATUS_MESSAGE_NOT_FOUND );
}

#ifndef NTOS_KERNEL_RUNTIME

#define MAX_INSERTS 200

NTSTATUS
RtlFormatMessage(
    IN PWSTR MessageFormat,
    IN ULONG MaximumWidth OPTIONAL,
    IN BOOLEAN IgnoreInserts,
    IN BOOLEAN ArgumentsAreAnsi,
    IN BOOLEAN ArgumentsAreAnArray,
    IN va_list *Arguments,
    OUT PWSTR Buffer,
    IN ULONG Length,
    OUT PULONG ReturnLength OPTIONAL
    )
{
    ULONG Column;
    int cchRemaining, cchWritten;
    PULONG ArgumentsArray = (PULONG)Arguments;
    ULONG rgInserts[ MAX_INSERTS ], cSpaces;
    ULONG MaxInsert, CurInsert;
    ULONG PrintParameterCount;
    ULONG PrintParameter1;
    ULONG PrintParameter2;
    WCHAR PrintFormatString[ 32 ];
    BOOLEAN DefaultedFormatString;
    WCHAR c;
    PWSTR s, s1;
    PWSTR lpDst, lpDstBeg, lpDstLastSpace;

    cchRemaining = Length / sizeof( WCHAR );
    lpDst = Buffer;
    MaxInsert = 0;
    lpDstLastSpace = NULL;
    Column = 0;
    s = MessageFormat;
    while (*s != UNICODE_NULL) {
        if (*s == L'%') {
            s++;
            lpDstBeg = lpDst;
            if (*s >= L'1' && *s <= L'9') {
                CurInsert = *s++ - L'0';
                if (*s >= L'0' && *s <= L'9') {
                    CurInsert = (CurInsert * 10) + (*s++ - L'0');
                    if (*s >= L'0' && *s <= L'9') {
                        CurInsert = (CurInsert * 10) + (*s++ - L'0');
                        if (*s >= L'0' && *s <= L'9') {
                            return( STATUS_INVALID_PARAMETER );
                            }
                        }
                    }
                CurInsert -= 1;

                PrintParameterCount = 0;
                if (*s == L'!') {
                    DefaultedFormatString = FALSE;
                    s1 = PrintFormatString;
                    *s1++ = L'%';
                    s++;
                    while (*s != L'!') {
                        if (*s != UNICODE_NULL) {
                            if (s1 >= &PrintFormatString[ 31 ]) {
                                return( STATUS_INVALID_PARAMETER );
                                }

                            if (*s == L'*') {
                                if (PrintParameterCount++ > 1) {
                                    return( STATUS_INVALID_PARAMETER );
                                    }
                                }

                            *s1++ = *s++;
                            }
                        else {
                            return( STATUS_INVALID_PARAMETER );
                            }
                        }

                    s++;
                    *s1 = UNICODE_NULL;
                    }
                else {
                    DefaultedFormatString = TRUE;
                    wcscpy( PrintFormatString, L"%s" );
                    s1 = PrintFormatString + wcslen( PrintFormatString );
                    }

                if (IgnoreInserts) {
                    if (!wcscmp( PrintFormatString, L"%s" )) {
                        cchWritten = _snwprintf( lpDst,
                                                 cchRemaining,
                                                 L"%%%u",
                                                 CurInsert+1
                                               );
                        }
                    else {
                        cchWritten = _snwprintf( lpDst,
                                                 cchRemaining,
                                                 L"%%%u!%s!",
                                                 CurInsert+1,
                                                 &PrintFormatString[ 1 ]
                                               );
                        }
                    }
                else
                if (ARGUMENT_PRESENT( Arguments )) {
                    if ((CurInsert+PrintParameterCount) >= MAX_INSERTS) {
                        return( STATUS_INVALID_PARAMETER );
                        }

                    if (ArgumentsAreAnsi) {
                        if (s1[ -1 ] == L'c' && s1[ -2 ] != L'h'
                          && s1[ -2 ] != L'w' && s1[ -2 ] != L'l') {
                            wcscpy( &s1[ -1 ], L"hc" );
                            }
                        else
                        if (s1[ -1 ] == L's' && s1[ -2 ] != L'h'
                          && s1[ -2 ] != L'w' && s1[ -2 ] != L'l') {
                            wcscpy( &s1[ -1 ], L"hs" );
                            }
                        else if (s1[ -1 ] == L'S') {
                            s1[ -1 ] = L's';
                            }
                        else if (s1[ -1 ] == L'C') {
                            s1[ -1 ] = L'c';
                            }
                        }

                    while (CurInsert >= MaxInsert) {
                        if (ArgumentsAreAnArray) {
                            rgInserts[ MaxInsert++ ] = *((PULONG)Arguments)++;
                            }
                        else {
                            rgInserts[ MaxInsert++ ] = va_arg(*Arguments, ULONG);
                            }
                        }

                    s1 = (PWSTR)rgInserts[ CurInsert ];
                    PrintParameter1 = 0;
                    PrintParameter2 = 0;
                    if (PrintParameterCount > 0) {
                        if (ArgumentsAreAnArray) {
                            PrintParameter1 = rgInserts[ MaxInsert++ ] = *((PULONG)Arguments)++;
                            }
                        else {
                            PrintParameter1 = rgInserts[ MaxInsert++ ] = va_arg( *Arguments, ULONG );
                            }

                        if (PrintParameterCount > 1) {
                            if (ArgumentsAreAnArray) {
                                PrintParameter2 = rgInserts[ MaxInsert++ ] = *((PULONG)Arguments)++;
                                }
                            else {
                                PrintParameter2 = rgInserts[ MaxInsert++ ] = va_arg( *Arguments, ULONG );
                                }
                            }
                        }

                    cchWritten = _snwprintf( lpDst,
                                             cchRemaining,
                                             PrintFormatString,
                                             s1,
                                             PrintParameter1,
                                             PrintParameter2
                                           );
                    }
                else {
                    return( STATUS_INVALID_PARAMETER );
                    }

                if ((cchRemaining -= cchWritten) <= 0) {
                    return STATUS_BUFFER_OVERFLOW;
                    }

                lpDst += cchWritten;
                }
            else
            if (*s == L'0') {
                break;
                }
            else
            if (!*s) {
                return( STATUS_INVALID_PARAMETER );
                }
            else
            if (*s == L'r') {
                if ((cchRemaining -= 1) <= 0) {
                    return STATUS_BUFFER_OVERFLOW;
                    }

                *lpDst++ = L'\r';
                s++;
                lpDstBeg = NULL;
                }
            else
            if (*s == L'n') {
                if ((cchRemaining -= 2) <= 0) {
                    return STATUS_BUFFER_OVERFLOW;
                    }

                *lpDst++ = L'\r';
                *lpDst++ = L'\n';
                s++;
                lpDstBeg = NULL;
                }
            else
            if (*s == L't') {
                if ((cchRemaining -= 1) <= 0) {
                    return STATUS_BUFFER_OVERFLOW;
                    }

                if (Column % 8) {
                    Column = (Column + 7) & ~7;
                    }
                else {
                    Column += 8;
                    }

                lpDstLastSpace = lpDst;
                *lpDst++ = L'\t';
                s++;
                }
            else
            if (*s == L'b') {
                if ((cchRemaining -= 1) <= 0) {
                    return STATUS_BUFFER_OVERFLOW;
                    }

                lpDstLastSpace = lpDst;
                *lpDst++ = L' ';
                s++;
                }
            else
            if (IgnoreInserts) {
                if ((cchRemaining -= 2) <= 0) {
                    return STATUS_BUFFER_OVERFLOW;
                    }

                *lpDst++ = L'%';
                *lpDst++ = *s++;
                }
            else {
                if ((cchRemaining -= 1) <= 0) {
                    return STATUS_BUFFER_OVERFLOW;
                    }

                *lpDst++ = *s++;
                }

            if (lpDstBeg == NULL) {
                lpDstLastSpace = NULL;
                Column = 0;
                }
            else {
                Column += lpDst - lpDstBeg;
                }
            }
        else {
            c = *s++;
            if (c == L'\r' || c == L'\n') {
                if ((c == L'\n' && *s == L'\r') ||
                    (c == L'\r' && *s == L'\n')
                   ) {
                    s++;
                    }

                if (MaximumWidth != 0) {
                    lpDstLastSpace = lpDst;
                    c = L' ';
                    }
                else {
                    c = L'\n';
                    }
                }


            if (c == L'\n') {
                if ((cchRemaining -= 2) <= 0) {
                    return STATUS_BUFFER_OVERFLOW;
                    }

                *lpDst++ = L'\r';
                *lpDst++ = L'\n';
                lpDstLastSpace = NULL;
                Column = 0;
                }
            else {
                if ((cchRemaining -= 1) <= 0) {
                    return STATUS_BUFFER_OVERFLOW;
                    }

                if (c == L' ') {
                    lpDstLastSpace = lpDst;
                    }

                *lpDst++ = c;
                Column += 1;
                }
            }

        if (MaximumWidth != 0 &&
            MaximumWidth != 0xFFFFFFFF &&
            Column >= MaximumWidth
           ) {
            if (lpDstLastSpace != NULL) {
                lpDstBeg = lpDstLastSpace;
                while (*lpDstBeg == L' ' || *lpDstBeg == L'\t') {
                    lpDstBeg += 1;
                    if (lpDstBeg == lpDst) {
                        break;
                        }
                    }
                while (lpDstLastSpace > Buffer) {
                    if (lpDstLastSpace[ -1 ] == L' ' || lpDstLastSpace[ -1 ] == L'\t') {
                        lpDstLastSpace -= 1;
                        }
                    else {
                        break;
                        }
                    }

                cSpaces = lpDstBeg - lpDstLastSpace;
                if (cSpaces == 1) {
                    if ((cchRemaining -= 1) <= 0) {
                        return STATUS_BUFFER_OVERFLOW;
                        }
                    }
                else
                if (cSpaces > 2) {
                    cchRemaining += (cSpaces - 2);
                    }

                memmove( lpDstLastSpace + 2,
                         lpDstBeg,
                         (lpDst - lpDstBeg) * sizeof( WCHAR )
                       );
                *lpDstLastSpace++ = L'\r';
                *lpDstLastSpace++ = L'\n';
                Column = lpDst - lpDstBeg;
                lpDst = lpDstLastSpace + Column;
                lpDstLastSpace = NULL;
                }
            else {
                if ((cchRemaining -= 2) <= 0) {
                    return STATUS_BUFFER_OVERFLOW;
                    }

                *lpDst++ = L'\r';
                *lpDst++ = L'\n';
                lpDstLastSpace = NULL;
                Column = 0;
                }
            }
        }

    if ((cchRemaining -= 1) <= 0) {
        return STATUS_BUFFER_OVERFLOW;
        }

    *lpDst++ = '\0';
    if ( ARGUMENT_PRESENT(ReturnLength) ) {
        *ReturnLength = (lpDst - Buffer) * sizeof( WCHAR );
        }
    return( STATUS_SUCCESS );
}
#endif