mirror of
https://github.com/reactos/reactos.git
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168 lines
3.1 KiB
C
168 lines
3.1 KiB
C
/*
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* MORE.C - external command.
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*
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* clone from 4nt more command
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*
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* 26 Sep 1999 - Paolo Pantaleo <paolopan@freemail.it>
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* started
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* Oct 2003 - Timothy Schepens <tischepe at fastmail dot fm>
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* use window size instead of buffer size.
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*/
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#include <windows.h>
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#include <malloc.h>
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#include <tchar.h>
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DWORD len;
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LPTSTR msg = _T("--- continue ---");
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/*handle for file and console*/
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HANDLE hStdIn;
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HANDLE hStdOut;
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HANDLE hStdErr;
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HANDLE hKeyboard;
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static VOID
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GetScreenSize (PSHORT maxx, PSHORT maxy)
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{
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CONSOLE_SCREEN_BUFFER_INFO csbi;
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GetConsoleScreenBufferInfo (hStdOut, &csbi);
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*maxx = (csbi.srWindow.Right - csbi.srWindow.Left) + 1;
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*maxy = (csbi.srWindow.Bottom - csbi.srWindow.Top) - 4;
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}
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static
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VOID ConOutPuts (LPTSTR szText)
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{
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DWORD dwWritten;
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WriteFile (GetStdHandle (STD_OUTPUT_HANDLE), szText, _tcslen(szText), &dwWritten, NULL);
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WriteFile (GetStdHandle (STD_OUTPUT_HANDLE), "\n", 1, &dwWritten, NULL);
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}
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static VOID
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ConInKey (VOID)
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{
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INPUT_RECORD ir;
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DWORD dwRead;
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do
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{
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ReadConsoleInput (hKeyboard, &ir, 1, &dwRead);
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if ((ir.EventType == KEY_EVENT) &&
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(ir.Event.KeyEvent.bKeyDown == TRUE))
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return;
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}
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while (TRUE);
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}
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static VOID
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WaitForKey (VOID)
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{
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DWORD dwWritten;
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WriteFile (hStdErr,msg , len, &dwWritten, NULL);
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ConInKey();
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WriteFile (hStdErr, _T("\n"), 1, &dwWritten, NULL);
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// FlushConsoleInputBuffer (hConsoleIn);
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}
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//INT CommandMore (LPTSTR cmd, LPTSTR param)
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int main (int argc, char **argv)
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{
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SHORT maxx,maxy;
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SHORT line_count=0,ch_count=0;
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INT i, last;
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HANDLE hFile = INVALID_HANDLE_VALUE;
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TCHAR szFullPath[MAX_PATH];
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/*reading/writing buffer*/
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TCHAR *buff;
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/*bytes written by WriteFile and ReadFile*/
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DWORD dwRead,dwWritten;
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/*ReadFile() return value*/
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BOOL bRet;
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len = _tcslen (msg);
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hStdIn = GetStdHandle(STD_INPUT_HANDLE);
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hStdOut = GetStdHandle(STD_OUTPUT_HANDLE);
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hStdErr = GetStdHandle(STD_ERROR_HANDLE);
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if (argc > 1 && _tcsncmp (argv[1], _T("/?"), 2) == 0)
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{
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ConOutPuts(_T("Help text still missing!!"));
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return 0;
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}
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hKeyboard = CreateFile (_T("CONIN$"), GENERIC_READ,
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0,NULL,OPEN_ALWAYS,0,0);
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GetScreenSize(&maxx,&maxy);
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buff=malloc(4096);
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FlushConsoleInputBuffer (hKeyboard);
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if(argc > 1)
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{
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GetFullPathName(argv[1], MAX_PATH, szFullPath, NULL);
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hFile = CreateFile (szFullPath, GENERIC_READ,
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0,NULL,OPEN_ALWAYS,0,0);
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}
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do
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{
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if(hFile != INVALID_HANDLE_VALUE)
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{
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bRet = ReadFile(hFile,buff,4096,&dwRead,NULL);
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}
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else
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{
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bRet = ReadFile(hStdIn,buff,4096,&dwRead,NULL);
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}
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for(last=i=0;i<dwRead && bRet;i++)
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{
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ch_count++;
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if(buff[i] == _T('\n') || ch_count == maxx)
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{
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ch_count=0;
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line_count++;
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if (line_count == maxy)
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{
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line_count = 0;
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WriteFile(hStdOut,&buff[last], i-last+1, &dwWritten, NULL);
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last=i+1;
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FlushFileBuffers (hStdOut);
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WaitForKey ();
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}
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}
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}
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if (last<dwRead && bRet)
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WriteFile(hStdOut,&buff[last], dwRead-last, &dwWritten, NULL);
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}
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while(dwRead>0 && bRet);
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free (buff);
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CloseHandle (hKeyboard);
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CloseHandle (hFile);
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return 0;
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}
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/* EOF */
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