134 lines
3.5 KiB
C
134 lines
3.5 KiB
C
/*++
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Copyright (c) 1992 Microsoft Corporation
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Module Name:
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misc.c
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Abstract:
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This is the console fullscreen driver for the VGA card.
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Environment:
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kernel mode only
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Notes:
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Revision History:
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--*/
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#include "fsvga.h"
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int
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ConvertOutputToOem(
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IN LPWSTR Source,
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IN int SourceLength, // in chars
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OUT LPSTR Target,
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IN int TargetLength // in chars
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)
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/*
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Converts SourceLength Unicode characters from Source into
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not more than TargetLength Codepage characters at Target.
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Returns the number characters put in Target. (0 if failure)
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[ntcon\server\misc.c]
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*/
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{
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NTSTATUS Status;
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int Length;
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UNICODE_STRING SourceUni;
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ANSI_STRING TargetAns;
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CHAR AnsBuf[256];
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SourceUni.MaximumLength =
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SourceUni.Length = SourceLength * sizeof(WCHAR);
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SourceUni.Buffer = Source;
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TargetAns.Length = 0;
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TargetAns.MaximumLength = sizeof(AnsBuf);
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TargetAns.Buffer = AnsBuf;
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// Can do this in place
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Status = RtlUnicodeStringToAnsiString(&TargetAns,
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&SourceUni,
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FALSE);
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if (NT_SUCCESS(Status)) {
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Length = strlen(AnsBuf);
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if (Length <= TargetLength) {
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RtlMoveMemory(Target, AnsBuf, Length);
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return Length;
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}
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else {
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return 0;
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}
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} else {
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return 0;
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}
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}
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/***************************************************************************\
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* TranslateOutputToOem
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*
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* routine to translate console PCHAR_INFO to the ASCII from Unicode
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*
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* [ntcon\server\fe\direct2.c]
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\***************************************************************************/
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NTSTATUS
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TranslateOutputToOem(
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OUT PCHAR_IMAGE_INFO OutputBuffer,
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IN PCHAR_IMAGE_INFO InputBuffer,
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IN ULONG Length
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)
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{
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CHAR AsciiDbcs[2];
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ULONG NumBytes;
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while (Length--)
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{
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if (InputBuffer->CharInfo.Attributes & COMMON_LVB_LEADING_BYTE)
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{
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if (Length >= 2) // Safe DBCS in buffer ?
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{
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Length--;
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NumBytes = sizeof(AsciiDbcs);
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NumBytes = ConvertOutputToOem(&InputBuffer->CharInfo.Char.UnicodeChar,
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1,
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&AsciiDbcs[0],
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NumBytes);
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OutputBuffer->CharInfo.Char.AsciiChar = AsciiDbcs[0];
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OutputBuffer->CharInfo.Attributes = InputBuffer->CharInfo.Attributes;
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OutputBuffer++;
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InputBuffer++;
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OutputBuffer->CharInfo.Char.AsciiChar = AsciiDbcs[1];
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OutputBuffer->CharInfo.Attributes = InputBuffer->CharInfo.Attributes;
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OutputBuffer++;
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InputBuffer++;
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}
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else
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{
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OutputBuffer->CharInfo.Char.AsciiChar = ' ';
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OutputBuffer->CharInfo.Attributes = InputBuffer->CharInfo.Attributes & ~COMMON_LVB_SBCSDBCS;
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OutputBuffer++;
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InputBuffer++;
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}
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}
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else if (! (InputBuffer->CharInfo.Attributes & COMMON_LVB_SBCSDBCS))
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{
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ConvertOutputToOem(&InputBuffer->CharInfo.Char.UnicodeChar,
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1,
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&OutputBuffer->CharInfo.Char.AsciiChar,
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1);
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OutputBuffer->CharInfo.Attributes = InputBuffer->CharInfo.Attributes;
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OutputBuffer++;
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InputBuffer++;
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}
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}
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return STATUS_SUCCESS;
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}
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