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125 lines
2.4 KiB
C
125 lines
2.4 KiB
C
/*
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* HISTORY.C - command line history.
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*
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*
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* History:
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*
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* 14/01/95 (Tim Norman)
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* started.
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*
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* 08/08/95 (Matt Rains)
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* i have cleaned up the source code. changes now bring this source
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* into guidelines for recommended programming practice.
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*
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* 27-Jul-1998 (John P Price <linux-guru@gcfl.net>)
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* added config.h include
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*
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* 25-Jan-1999 (Eric Kohl <ekohl@abo.rhein-zeitung.de>)
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* Cleanup!
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* Unicode and redirection safe!
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*/
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#include "config.h"
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#ifdef FEATURE_HISTORY
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#include <windows.h>
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#include <tchar.h>
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#include <string.h>
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#include <stdlib.h>
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#include "cmd.h"
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#define MAXLINES 128
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static INT history_size = 2048; /* make this configurable later */
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VOID History (INT dir, LPTSTR commandline)
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{
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static LPTSTR history = NULL;
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static LPTSTR lines[MAXLINES];
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static INT curline = 0;
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static INT numlines = 0;
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static INT maxpos = 0;
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INT count;
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INT length;
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if (!history)
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{
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history = malloc (history_size * sizeof (TCHAR));
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lines[0] = history;
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history[0] = 0;
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}
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if (dir > 0)
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{
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/* next command */
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if (curline < numlines)
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{
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curline++;
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}
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if (curline == numlines)
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{
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commandline[0] = 0;
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}
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else
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{
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_tcscpy (commandline, lines[curline]);
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}
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}
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else if (dir < 0)
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{
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/* prev command */
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if (curline > 0)
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{
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curline--;
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}
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_tcscpy (commandline, lines[curline]);
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}
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else
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{
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/* add to history */
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/* remove oldest string until there's enough room for next one */
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/* strlen (commandline) must be less than history_size! */
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while ((maxpos + (INT)_tcslen (commandline) + 1 > history_size) || (numlines >= MAXLINES))
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{
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length = _tcslen (lines[0]) + 1;
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for (count = 0; count < maxpos && count + (lines[1] - lines[0]) < history_size; count++)
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{
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history[count] = history[count + length];
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}
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maxpos -= length;
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for (count = 0; count <= numlines && count < MAXLINES; count++)
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{
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lines[count] = lines[count + 1] - length;
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}
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numlines--;
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#ifdef DEBUG
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ConOutPrintf (_T("Reduced size: %ld lines\n"), numlines);
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for (count = 0; count < numlines; count++)
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{
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ConOutPrintf (_T("%d: %s\n"), count, lines[count]);
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}
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#endif
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}
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_tcscpy (lines[numlines], commandline);
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numlines++;
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lines[numlines] = lines[numlines - 1] + _tcslen (commandline) + 1;
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maxpos += _tcslen (commandline) + 1;
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/* last line, empty */
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curline = numlines;
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}
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return;
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}
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#endif
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