READER.C
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/*-----------------------------------------------------------------------------
This is a part of the Microsoft Source Code Samples.
Copyright (C) 1995 Microsoft Corporation.
All rights reserved.
This source code is only intended as a supplement to
Microsoft Development Tools and/or WinHelp documentation.
See these sources for detailed information regarding the
Microsoft samples programs.
MODULE: Reader.c
PURPOSE: Read from comm port
FUNCTIONS:
OutputABufferToWindow - 传入的数据显示到窗口
OutputABufferToFile - 传入的数据保存到文件
OutputABuffer - 从端口读取数据时调用
-----------------------------------------------------------------------------*/
#include <windows.h>
#include <commctrl.h>
#include "MTTTY.h"
/*
Prototypes for functions call only within this file
*/
void OutputABufferToFile( HANDLE, char *, DWORD );
/*-----------------------------------------------------------------------------
FUNCTION: OutputABufferToWindow(HWND, char *, DWORD)
PURPOSE: 用刚刚收到的字符更新TTY缓冲区。
PARAMETERS:
hTTY - handle to the TTY child window
lpBuf - address of data buffer
dwBufLen - size of data buffer
HISTORY: Date Author Comment
5/ 8/91 BryanW Wrote it
10/27/95 AllenD Modified for MTTTY Sample
-----------------------------------------------------------------------------*/
void OutputABufferToWindow(HWND hTTY, char * lpBuf, DWORD dwBufLen)
{
RECT rect;
//更新屏幕缓冲区与新的缓冲区 需要一个字符一个字符地检查 为特殊字符
int i;
for (i = 0; i < dwBufLen; i++)
{
switch (lpBuf[i])
{
case ASCII_BEL: // BELL CHAR
MessageBeep(0);
break;
case ASCII_BS: // Backspace CHAR
if (TTYInfo.nColumn > 0)
TTYInfo.nColumn--;
break;
case ASCII_CR: // Carriage Return
TTYInfo.nColumn = 0;
if (!TTYInfo.fNewLine)
break;
//
// FALL THROUGH
//
case ASCII_LF: // Line Feed
if (TTYInfo.nRow++ == MAXROWS - 1)
{
MoveMemory((LPSTR) (TTYInfo.Screen),
(LPSTR) (TTYInfo.Screen + MAXCOLS),
(MAXROWS - 1) *MAXCOLS);
FillMemory((LPSTR) (TTYInfo.Screen + (MAXROWS - 1) *MAXCOLS),
MAXCOLS, ' ');
InvalidateRect(hTTY, NULL, FALSE);
TTYInfo.nRow--;
}
break;
default: // standard character
TTYInfo.Screen[TTYInfo.nRow * MAXCOLS + TTYInfo.nColumn] = lpBuf[i];
rect.left = (TTYInfo.nColumn * TTYInfo.xChar) -TTYInfo.xOffset;
rect.right = rect.left + TTYInfo.xChar;
rect.top = (TTYInfo.nRow * TTYInfo.yChar) -TTYInfo.yOffset;
rect.bottom = rect.top + TTYInfo.yChar;
InvalidateRect(hTTY, &rect, FALSE);
// Line wrap
if (TTYInfo.nColumn < MAXCOLS - 1)
TTYInfo.nColumn++;
else if (TTYInfo.fAutowrap)
OutputABufferToWindow(hTTY, "\r\n", 2);
break;
}
}
MoveTTYCursor(hTTY);
return;
}
/*-----------------------------------------------------------------------------
FUNCTION: OutputABufferToFile(HANDLE, char *, DWORD)
PURPOSE: 将已读取的缓冲区输出到文件中
PARAMETERS:
hFile - 文件的句柄保存数据到
lpBuf - address of data buffer
dwBufLen - size of data buffer
HISTORY: Date: Author: Comment:
10/27/95 AllenD Wrote it
-----------------------------------------------------------------------------*/
void OutputABufferToFile(HANDLE hFile, char * lpBuf, DWORD dwBufLen)
{
DWORD dwWritten;
//
// place buffer into file, report any errors
//
if (!WriteFile(hFile, lpBuf, dwBufLen, &dwWritten, NULL))
ErrorReporter("WriteFile in file capture");
if (dwBufLen != dwWritten)
ErrorReporter("WriteFile");
//
// update transfer progress bar
//
PostMessage(GetDlgItem(ghWndStatusDlg, IDC_TRANSFERPROGRESS), PBM_STEPIT, 0, 0);
return;
}
/*-----------------------------------------------------------------------------
FUNCTION: OutputABuffer(HWND, char *, DWORD)
PURPOSE: Send a rec'd buffer to the approprate location
PARAMETERS:
hTTY - handle to the TTY child window
lpBuf - address of data buffer
dwBufLen - size of data buffer
COMMENTS: If buffer is 0 length, then do nothing.
HISTORY: Date: Author: Comment:
10/27/95 AllenD Wrote it
-----------------------------------------------------------------------------*/
void OutputABuffer(HWND hTTY, char * lpBuf, DWORD dwBufLen)
{
if (dwBufLen == 0) {
OutputDebugString("NULL Buffer in OutputABuffer\n\r");
return;
}
switch(gdwReceiveState)
{
case RECEIVE_TTY:
OutputABufferToWindow(hTTY, lpBuf, dwBufLen);
break;
case RECEIVE_CAPTURED:
OutputABufferToFile(ghFileCapture, lpBuf, dwBufLen);
break;
default:
OutputDebugString("Unknown receive state!\n\r");
}
return;
}