710 lines
18 KiB
C
710 lines
18 KiB
C
///////////////////////////////////////////////////////////////
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//
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// ReadCon.cpp
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//
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//
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// ReadConsole implementation for Win95 that implements the command line editing
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// keys, since pathetic Win95 console implementation does not.
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//
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#include "cmd.h"
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#ifdef WIN95_CMD
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// adv declarations....
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extern BOOLEAN CtrlCSeen;
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extern BOOL bInsertDefault;
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void ShowBuf( TCHAR* pBuf, int nFromPos );
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// some state variables.....
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static int nConsoleWidth; // num columns
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static int nConsoleHeight; // num rows
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static COORD coordStart; // coord of first cmd char....
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static COORD coordEnd; // coord of last cmd char....
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static int nBufPos = 0; // buffer cursor position
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static int nBufLen = 0; // length of current command
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static BOOL bInsert; // insert mode
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static HANDLE hOut; // output buffer handle
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static TCHAR* pPrompt; // allocated buffer to store prompt
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static int nPromptSize; // num chars in prompt buffer
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static WORD wDefAttr; // default character attribute
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static int nState = 0; // input state
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static TCHAR history[50][2049]; // history list
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static int nFirstCmd = -1; // index of first cmd
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static int nLastCmd = -1; // index of last command entered
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static int nHistNdx = -1; // index into history list....
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static TCHAR* pSearchStr = 0; // search criteria buffer (allocated)
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void
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IncCoord(
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COORD* coord,
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int nDelta
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)
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{
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coord->X += nDelta;
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if ( coord->X < 0 )
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{
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coord->Y += coord->X/nConsoleWidth - 1;
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coord->X = nConsoleWidth - (-coord->X)%nConsoleWidth;
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}
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else
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if ( coord->X >= nConsoleWidth )
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{
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coord->Y += coord->X / nConsoleWidth;
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coord->X %= nConsoleWidth;
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}
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}
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void
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GetOffsetCoord(
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TCHAR* pBuf,
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int nOffset,
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COORD* coord
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)
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{
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int ndx;
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// let's walk the buffer to find the correct coord....
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*coord = coordStart;
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for( ndx=0; ndx<nOffset; ++ndx )
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{
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if ( pBuf[ndx] == 9 )
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{
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int nTab;
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for ( nTab=1; (nTab+coord->X)%8 ; ++nTab );
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coord->X += nTab-1;
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}
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else
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if ( pBuf[ndx] < 32 )
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++coord->X;
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IncCoord( coord, +1 );
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}
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}
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int
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ScrollTo(
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TCHAR* pBuf,
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COORD* coord
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)
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{
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int nLines = 0;
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SMALL_RECT rectFrom;
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COORD coordTo;
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CHAR_INFO cBlank;
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// get some data....
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cBlank.Char.AsciiChar = ' ';
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cBlank.Attributes = wDefAttr;
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coordTo.X = 0;
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rectFrom.Left = 0;
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rectFrom.Right = nConsoleWidth - 1;
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// scroll it....
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if ( coord->Y < 0 )
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{
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// scroll down....
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nLines = coord->Y;
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rectFrom.Top = 0;
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rectFrom.Bottom = nConsoleHeight + nLines - 1;
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coordTo.Y = -nLines;
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ScrollConsoleScreenBuffer( hOut, &rectFrom, NULL, coordTo, &cBlank );
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}
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else
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{
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// scroll up....
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nLines = coord->Y - nConsoleHeight + 1;
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rectFrom.Top = nLines;
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rectFrom.Bottom = nConsoleHeight - 1;
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coordTo.Y = 0;
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ScrollConsoleScreenBuffer( hOut, &rectFrom, NULL, coordTo, &cBlank );
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}
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// adjust start/end coords and orig coord to reflect new scroll....
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coordStart.Y -= nLines;
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coordEnd.Y -= nLines;
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coord->Y -= nLines;
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// redraw the whole command AND the prompt.....
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ShowBuf( pBuf, -1 );
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return nLines;
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}
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void
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AdjCursor(
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TCHAR* pBuf
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)
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{
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COORD coordCursor;
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GetOffsetCoord( pBuf, nBufPos, &coordCursor );
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if ( coordCursor.Y < 0 || coordCursor.Y >= nConsoleHeight )
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{
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// scroll it....
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ScrollTo( pBuf, &coordCursor );
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}
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SetConsoleCursorPosition( hOut, coordCursor );
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}
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void
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AdjCursorSize( void )
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{
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CONSOLE_CURSOR_INFO cci;
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cci.bVisible = TRUE;
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if ( bInsert == bInsertDefault )
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cci.dwSize = 13;
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else
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cci.dwSize = 40;
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SetConsoleCursorInfo( hOut, &cci );
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}
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void
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AdvancePos(
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TCHAR* pBuf,
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int nDelta,
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DWORD dwKeyState
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)
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{
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// see if control key down....
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if ( (dwKeyState & (RIGHT_CTRL_PRESSED | LEFT_CTRL_PRESSED)) != 0 )
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{
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if ( nDelta > 0 )
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{ // skip to NEXT word....
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while ( nBufPos < nBufLen && !isspace(pBuf[nBufPos]) )
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++nBufPos;
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while ( nBufPos < nBufLen && isspace(pBuf[nBufPos]) )
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++nBufPos;
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}
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else
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{ // skip to PREVIOUS word....
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// if already at beginning of word, back up one....
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if ( nBufPos > 0 && isspace(pBuf[nBufPos-1]) )
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--nBufPos;
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// skip white space....
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while ( nBufPos > 0 && isspace(pBuf[nBufPos]) )
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--nBufPos;
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// skip non-ws....
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while ( nBufPos > 0 && !isspace(pBuf[nBufPos-1]) )
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--nBufPos;
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}
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}
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else
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nBufPos += nDelta;
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AdjCursor( pBuf );
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}
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void
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ShowBuf(
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TCHAR* pBuf,
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int nFromPos
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)
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{
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DWORD cPrint;
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COORD coord, cPrompt;
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TCHAR temp[8];
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int ndx;
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// see if we want the prompt, too....
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if ( nFromPos < 0 )
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{
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nFromPos = 0;
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GetOffsetCoord( pBuf, 0, &coord );
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cPrompt = coord;
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cPrompt.X -= nPromptSize;
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WriteConsoleOutputCharacter( hOut, pPrompt, nPromptSize, cPrompt, &cPrint );
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}
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else
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GetOffsetCoord( pBuf, nFromPos, &coord );
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// walk the rest of the buffer, displaying as we go....
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for( ndx=nFromPos;ndx < nBufLen; ++ndx )
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{
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if ( pBuf[ndx] == 9 )
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{
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int nTab;
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temp[0] = TEXT(' ');
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for ( nTab=1; (nTab+coord.X)%8; ++nTab )
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{
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temp[nTab] = TEXT(' ');
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}
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WriteConsoleOutputCharacter( hOut, temp, nTab, coord, &cPrint );
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coord.X += nTab-1;
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}
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else if ( pBuf[ndx] < 32 )
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{
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temp[0] = '^';
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temp[1] = pBuf[ndx] + 'A' - 1;
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WriteConsoleOutputCharacter( hOut, temp, 2, coord, &cPrint );
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++coord.X;
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}
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else
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WriteConsoleOutputCharacter( hOut, pBuf + ndx, 1, coord, &cPrint );
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// advance cursor.....
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IncCoord( &coord, +1 );
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}
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// now blank out the rest.....
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temp[0] = TEXT(' ');
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while ( coordEnd.Y > coord.Y || (coordEnd.Y == coord.Y && coordEnd.X >= coord.X) )
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{
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WriteConsoleOutputCharacter( hOut, temp, 1, coordEnd, &cPrint );
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IncCoord( &coordEnd, -1 );
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}
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// save the new ending....
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coordEnd = coord;
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}
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void
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ShiftBuffer(
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TCHAR* pBuf,
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int cch,
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int nFrom,
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int nDelta
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)
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{
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int ndx;
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// which direction?
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if ( nDelta > 0 )
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{
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// move all (including this character) out one place....
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for( ndx = nBufLen; ndx > nFrom; --ndx )
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pBuf[ndx] = pBuf[ndx-1];
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++nBufLen;
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}
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else if ( nDelta < 0 )
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{
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// move all characters in one place (over this character)...
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for( ndx = nFrom; ndx < nBufLen; ++ ndx )
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pBuf[ndx] = pBuf[ndx+1];
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--nBufLen;
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}
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}
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void
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LoadHistory(
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TCHAR* pBuf,
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int cch,
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TCHAR* pHist
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)
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{
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// first go to the front of the line....
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nBufPos = 0;
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AdjCursor( pBuf );
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// then blank-out the current buffer....
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if ( nBufLen )
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{
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nBufLen = 0;
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ShowBuf( pBuf, 0 );
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}
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// now copy in the new one (if there is one)....
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if ( pHist )
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{
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_tcsncpy( pBuf, pHist, cch );
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nBufLen = _tcslen( pHist );
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// move to the end of the line....
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nBufPos = nBufLen;
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AdjCursor( pBuf );
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// show the whole buffer from the start....
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ShowBuf( pBuf, 0 );
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}
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}
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void
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SearchHist(
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TCHAR* pBuf,
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int cch
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)
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{
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int ndx, nSearch, nStop;
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// if we're in input mode, set ndx to AFTER last command....
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if ( nState == 0 )
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ndx = (nLastCmd+1)%50;
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else
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ndx = nHistNdx;
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nStop = ndx; // don't search past here
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// if not already in search mode, get a copy of the target....
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if ( nState != 4 )
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{
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// if there already is a search string, get rid of it....
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if ( pSearchStr )
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free( pSearchStr );
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// pSearchStr and copy a new search string....
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pSearchStr = calloc( nBufLen+1, sizeof(TCHAR) );
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_tcsncpy( pSearchStr, pBuf, nBufLen );
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pSearchStr[nBufLen] = 0;
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}
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nSearch = _tcslen( pSearchStr );
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// enter search mode....
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nState = 4;
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do
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{
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// back up one cmd....
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ndx = (ndx+49)%50;
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// check it....
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if ( _tcsncmp( history[ndx], pSearchStr, nSearch ) == 0 )
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{
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// found a match....
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nHistNdx = ndx;
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LoadHistory( pBuf, cch, history[ndx] );
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break;
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}
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} while ( ndx != nStop );
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}
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int touched = 1;
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BOOL
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ProcessKey(
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const KEY_EVENT_RECORD* keyEvent,
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TCHAR* pBuf,
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int cch,
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DWORD dwCtrlWakeupMask,
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PBOOL bWakeupKeyHit
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)
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{
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BOOL bDone = FALSE;
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TCHAR ch;
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*bWakeupKeyHit = FALSE;
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ch = keyEvent->uChar.AsciiChar;
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if ( keyEvent->wVirtualKeyCode == VK_SPACE )
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ch = TEXT(' ');
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switch ( keyEvent->wVirtualKeyCode )
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{
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case VK_RETURN:
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bDone = TRUE;
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// move cursor to end of cmd, if not already there....
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if ( nBufPos != nBufLen )
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{
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nBufPos = nBufLen;
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AdjCursor( pBuf );
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}
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// add the NLN to end of cmd....
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pBuf[nBufLen] = _T('\n');
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++nBufLen;
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touched = 1;
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break;
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case VK_BACK:
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if ( nBufPos > 0 )
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{
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// return to input state....
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nState = 0;
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// back up the cursor....
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AdvancePos( pBuf, -1, 0 );
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// shift over this character and print....
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ShiftBuffer( pBuf, cch, nBufPos, -1 );
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ShowBuf( pBuf, nBufPos );
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touched = 1;
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}
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break;
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case VK_END:
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if ( nBufPos != nBufLen )
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{
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// doesn't affect state....
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nBufPos = nBufLen;
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AdjCursor( pBuf );
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}
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break;
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case VK_HOME:
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if ( nBufPos )
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{
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// doesn't affect state....
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nBufPos = 0;
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AdjCursor( pBuf );
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}
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break;
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case VK_LEFT:
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// doesn't affect state....
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if ( nBufPos > 0 )
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AdvancePos( pBuf, -1, keyEvent->dwControlKeyState );
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break;
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case VK_RIGHT:
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// doesn't affect state....
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if ( nBufPos < nBufLen )
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AdvancePos( pBuf, +1, keyEvent->dwControlKeyState );
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break;
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case VK_INSERT:
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// doesn't affect state....
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bInsert = !bInsert;
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AdjCursorSize();
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break;
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case VK_DELETE:
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if ( nBufPos < nBufLen )
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{
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// fall back to input state....
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nState = 0;
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// shift over this character and print....
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ShiftBuffer( pBuf, cch, nBufPos, -1 );
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ShowBuf( pBuf, nBufPos );
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touched = 1;
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}
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break;
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case VK_F8:
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// if there's something to match....
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if ( nBufLen != 0 )
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{
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// if we're not already at the top of the list....
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//if ( nHistNdx != nFirstCmd )
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//{
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// search backwards up the list....
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SearchHist( pBuf, cch );
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//}
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touched = 1;
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break;
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}
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// fall through if there's nothing to match with....
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// same as pressing up arrow....
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case VK_UP:
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// if we're not already at the top of the list....
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if ( nState == 0 || nHistNdx != nFirstCmd )
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{
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if ( nState == 0 )
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nHistNdx = nLastCmd;
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else
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nHistNdx = (nHistNdx+49)%50;
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LoadHistory( pBuf, cch, history[nHistNdx] );
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// scrolling through history....
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nState = 2;
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touched = 1;
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}
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break;
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case VK_DOWN:
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if ( nState == 0 || nHistNdx == nLastCmd )
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{
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// blank out command buffer...
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LoadHistory( pBuf, cch, NULL );
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// return to input state....
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nState = 0;
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}
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else
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{
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// get the next one....
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nHistNdx = (nHistNdx+1)%50;
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LoadHistory( pBuf, cch, history[nHistNdx] );
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// scrolling through history....
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nState = 2;
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}
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touched = 1;
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break;
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case VK_ESCAPE:
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// blank-out the command buffer....
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LoadHistory( pBuf, cch, NULL );
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// return to input....
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nState = 0;
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touched = 1;
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break;
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default:
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// if printable character, let's add it in....
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if ( ch >= 1 && ch <= 255 )
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{
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touched = 1;
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// fall back to input state....
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nState = 0;
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// see if there's room....
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if ( nBufPos >= cch || (bInsert && nBufLen >= cch) )
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MessageBeep( MB_ICONEXCLAMATION );
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else
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{
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if ( bInsert )
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{
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// shift the buffer out for the insert....
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ShiftBuffer( pBuf, cch, nBufPos, +1 );
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}
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else
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if ( nBufPos >= nBufLen )
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++nBufLen;
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// place the character in the buffer at the current pos....
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pBuf[nBufPos] = ch;
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if (ch < TEXT(' ') && (dwCtrlWakeupMask & (1 << ch))) {
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*bWakeupKeyHit = TRUE;
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AdjCursor(pBuf);
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bDone = TRUE;
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} else {
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// show from this position on....
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ShowBuf( pBuf, nBufPos );
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// advance position/cursor....
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AdvancePos( pBuf, +1, 0 );
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}
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}
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}
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}
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return bDone;
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}
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static UINT nOldIndex =0;
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static DWORD cRead = 0;
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static INPUT_RECORD ir[32];
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BOOL bInsertDefault = FALSE;
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BOOL
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Win95ReadConsoleA(
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HANDLE hIn,
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LPSTR pBuf,
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DWORD cch,
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LPDWORD pcch,
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LPVOID lpReserved
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)
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{
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PCONSOLE_READCONSOLE_CONTROL pInputControl;
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CONSOLE_SCREEN_BUFFER_INFO csbi;
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const KEY_EVENT_RECORD* keyEvent;
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BOOL bOk = TRUE; // return status value
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DWORD dwc, dwOldMode;
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DWORD dwCtrlWakeupMask;
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BOOL bWakeupKeyHit;
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// initialize the state variables....
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nState = 0; // input mode
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nBufPos = 0; // buffer cursor position
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nBufLen = 0; // length of current command
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bInsert = bInsertDefault; // insert mode
|
|
|
|
// set the appropriate console mode....
|
|
if (!GetConsoleMode( hIn, &dwOldMode ))
|
|
return FALSE;
|
|
SetConsoleMode( hIn, ENABLE_PROCESSED_INPUT );
|
|
|
|
// get the ouput buffer handle....
|
|
hOut = GetStdHandle(STD_OUTPUT_HANDLE);
|
|
if ( hOut == INVALID_HANDLE_VALUE )
|
|
{
|
|
DWORD dwErr = GetLastError();
|
|
hOut = CRTTONT( STDOUT );
|
|
}
|
|
|
|
// get the output console info....
|
|
if ( GetConsoleScreenBufferInfo( hOut, &csbi ) == FALSE )
|
|
return FALSE;
|
|
|
|
// save size and initial cursor pos and console width....
|
|
coordStart = coordEnd = csbi.dwCursorPosition;
|
|
nConsoleWidth = csbi.dwSize.X;
|
|
nConsoleHeight = csbi.dwSize.Y;
|
|
wDefAttr = csbi.wAttributes;
|
|
// allocate a buffer to hold whatever is before command....
|
|
nPromptSize = 0;
|
|
if ( coordStart.X > 0 )
|
|
{
|
|
COORD cPrompt;
|
|
DWORD dwRead;
|
|
|
|
nPromptSize = coordStart.X;
|
|
cPrompt = coordStart;
|
|
cPrompt.X = 0;
|
|
pPrompt = calloc( nPromptSize+1, sizeof(TCHAR) );
|
|
// now copy the data....
|
|
ReadConsoleOutputCharacter( hOut, pPrompt, nPromptSize,
|
|
cPrompt, &dwRead );
|
|
// NULL-terminate it....
|
|
pPrompt[dwRead] = 0;
|
|
}
|
|
AdjCursorSize();
|
|
|
|
pInputControl = (PCONSOLE_READCONSOLE_CONTROL)lpReserved;
|
|
if (pInputControl != NULL && pInputControl->nLength == sizeof(*pInputControl)) {
|
|
dwCtrlWakeupMask = pInputControl->dwCtrlWakeupMask;
|
|
nBufLen = pInputControl->nInitialChars;
|
|
nBufPos = pInputControl->nInitialChars;
|
|
} else {
|
|
pInputControl = NULL;
|
|
dwCtrlWakeupMask = 0;
|
|
}
|
|
while ( !CtrlCSeen )
|
|
{
|
|
// get the next input record....
|
|
UINT ndx;
|
|
if( nOldIndex == 0 )
|
|
ReadConsoleInput( hIn, ir, sizeof(ir)/sizeof(INPUT_RECORD), &cRead );
|
|
|
|
// process all the records we just received....
|
|
for( ndx=nOldIndex; ndx < cRead; ++ndx )
|
|
{
|
|
// process only key down events....
|
|
keyEvent = &(ir[ndx].Event.KeyEvent);
|
|
if( ir[ndx].EventType == KEY_EVENT &&
|
|
keyEvent->bKeyDown &&
|
|
ProcessKey( keyEvent, pBuf, cch, dwCtrlWakeupMask, &bWakeupKeyHit )
|
|
)
|
|
{
|
|
if (pInputControl != NULL)
|
|
pInputControl->dwControlKeyState = keyEvent->dwControlKeyState;
|
|
goto donereading;
|
|
}
|
|
}
|
|
if( cRead == ndx ) {
|
|
nOldIndex = 0;
|
|
} else {
|
|
nOldIndex = ndx + 1;
|
|
}
|
|
}
|
|
donereading:
|
|
// clean-up....
|
|
if ( pPrompt ) {
|
|
free( pPrompt );
|
|
pPrompt = NULL;
|
|
}
|
|
if ( pSearchStr ) {
|
|
free( pSearchStr );
|
|
pSearchStr = NULL;
|
|
}
|
|
|
|
if (!bWakeupKeyHit) {
|
|
// not okay if we Ctrl-C'ed out....
|
|
if ( CtrlCSeen )
|
|
{
|
|
bOk = FALSE;
|
|
nBufPos = nBufLen;
|
|
AdjCursor( pBuf );
|
|
*pcch = 0;
|
|
}
|
|
else
|
|
{
|
|
// save to history (less the NLN) if something entered....
|
|
if ( nBufLen > 1 )
|
|
{
|
|
nLastCmd = (nLastCmd+1)%50;
|
|
// adjust the first for wrap-around....
|
|
if ( nLastCmd == nFirstCmd || nFirstCmd == -1 )
|
|
nFirstCmd = (nFirstCmd+1)%50;
|
|
_tcsncpy( history[nLastCmd], pBuf, nBufLen-1 );
|
|
// null-terminate....
|
|
history[nLastCmd][nBufLen-1] = 0;
|
|
}
|
|
*pcch = nBufLen;
|
|
}
|
|
|
|
// go to next line....
|
|
WriteConsole( hOut, _T("\n\r"), 2, &dwc, NULL );
|
|
FlushConsoleInputBuffer( hIn );
|
|
} else {
|
|
*pcch = nBufLen;
|
|
}
|
|
|
|
// restore the console mode....
|
|
SetConsoleMode( hIn, dwOldMode );
|
|
|
|
return bOk;
|
|
}
|
|
|
|
#endif // ifdef WIN95_CMD
|