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reactos/base/shell/cmd/filecomp.c
chirsz a91a709a8d
[CMD] Fix a typo in filename completion (#3293) 
Fix filename completion that could cause a incorrect result when the path
contains "dots". (See also HBelusca@d12169b.)
See CORE-8623 and CORE-1901 (bug introduced in r25896 / 54cf74f).

For example:

- The current directory is `C:\Documents and Settings\Administrator\`, and you
  input `".` and press TAB. The completion result would be `".Administrator"`,
  which even does not exist.

- You input "some(file).ext", and you remove the final quote (or the quote
  and "ext") and you attempt to complete the file name.

- Import two additional fixes from HBelusca@a826730: Fix the search ordering
  in the comparisons between szSearch1, szSearch2 and szSearch3.

Co-authored-by: Hermès BÉLUSCA - MAÏTO <hermes.belusca-maito@reactos.org>
2020-10-11 21:57:08 +02:00

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/*
* FILECOMP.C - handles filename completion.
*
*
* Comments:
*
* 30-Jul-1998 (John P Price <linux-guru@gcfl.net>)
* moved from command.c file
* made second TAB display list of filename matches
* made filename be lower case if last character typed is lower case
*
* 25-Jan-1999 (Eric Kohl)
* Cleanup. Unicode safe!
*
* 30-Apr-2004 (Filip Navara <xnavara@volny.cz>)
* Make the file listing readable when there is a lot of long names.
*
* 05-Jul-2004 (Jens Collin <jens.collin@lakhei.com>)
* Now expands lfn even when trailing " is omitted.
*/
#include "precomp.h"
#ifdef FEATURE_UNIX_FILENAME_COMPLETION
VOID CompleteFilename (LPTSTR str, UINT charcount)
{
WIN32_FIND_DATA file;
HANDLE hFile;
INT curplace = 0;
INT start;
INT count;
INT step;
INT c = 0;
BOOL found_dot = FALSE;
BOOL perfectmatch = TRUE;
TCHAR path[MAX_PATH];
TCHAR fname[MAX_PATH];
TCHAR maxmatch[MAX_PATH] = _T("");
TCHAR directory[MAX_PATH];
LPCOMMAND cmds_ptr;
/* expand current file name */
count = charcount - 1;
if (count < 0)
count = 0;
/* find how many '"'s there is typed already. */
step = count;
while (step > 0)
{
if (str[step] == _T('"'))
c++;
step--;
}
/* if c is odd, then user typed " before name, else not. */
/* find front of word */
if (str[count] == _T('"') || (c % 2))
{
count--;
while (count > 0 && str[count] != _T('"'))
count--;
}
else
{
while (count > 0 && str[count] != _T(' '))
count--;
}
/* if not at beginning, go forward 1 */
if (str[count] == _T(' '))
count++;
start = count;
if (str[count] == _T('"'))
count++; /* don't increment start */
/* extract directory from word */
_tcscpy (directory, &str[count]);
curplace = _tcslen (directory) - 1;
if (curplace >= 0 && directory[curplace] == _T('"'))
directory[curplace--] = _T('\0');
_tcscpy (path, directory);
while (curplace >= 0 && directory[curplace] != _T('\\') &&
directory[curplace] != _T('/') &&
directory[curplace] != _T(':'))
{
directory[curplace] = 0;
curplace--;
}
/* look for a '.' in the filename */
for (count = _tcslen (directory); path[count] != _T('\0'); count++)
{
if (path[count] == _T('.'))
{
found_dot = TRUE;
break;
}
}
if (found_dot)
_tcscat (path, _T("*"));
else
_tcscat (path, _T("*.*"));
/* current fname */
curplace = 0;
hFile = FindFirstFile (path, &file);
if (hFile != INVALID_HANDLE_VALUE)
{
/* find anything */
do
{
/* ignore "." and ".." */
if (!_tcscmp (file.cFileName, _T(".")) ||
!_tcscmp (file.cFileName, _T("..")))
continue;
_tcscpy (fname, file.cFileName);
if (file.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
_tcscat (fname, _T("\\"));
if (!maxmatch[0] && perfectmatch)
{
_tcscpy(maxmatch, fname);
}
else
{
for (count = 0; maxmatch[count] && fname[count]; count++)
{
if (tolower(maxmatch[count]) != tolower(fname[count]))
{
perfectmatch = FALSE;
maxmatch[count] = 0;
break;
}
}
if (maxmatch[count] == _T('\0') &&
fname[count] != _T('\0'))
perfectmatch = FALSE;
}
}
while (FindNextFile (hFile, &file));
FindClose (hFile);
/* only quote if the filename contains spaces */
if (_tcschr(directory, _T(' ')) ||
_tcschr(maxmatch, _T(' ')))
{
str[start] = _T('\"');
_tcscpy (&str[start+1], directory);
_tcscat (&str[start], maxmatch);
_tcscat (&str[start], _T("\"") );
}
else
{
_tcscpy (&str[start], directory);
_tcscat (&str[start], maxmatch);
}
if (!perfectmatch)
{
MessageBeep (-1);
}
}
else
{
/* no match found - search for internal command */
for (cmds_ptr = cmds; cmds_ptr->name; cmds_ptr++)
{
if (!_tcsnicmp (&str[start], cmds_ptr->name,
_tcslen (&str[start])))
{
/* return the mach only if it is unique */
if (_tcsnicmp (&str[start], (cmds_ptr+1)->name, _tcslen (&str[start])))
_tcscpy (&str[start], cmds_ptr->name);
break;
}
}
MessageBeep (-1);
}
}
/*
* returns 1 if at least one match, else returns 0
*/
BOOL ShowCompletionMatches (LPTSTR str, INT charcount)
{
WIN32_FIND_DATA file;
HANDLE hFile;
BOOL found_dot = FALSE;
INT curplace = 0;
INT count;
TCHAR path[MAX_PATH];
TCHAR fname[MAX_PATH];
TCHAR directory[MAX_PATH];
SHORT screenwidth;
/* expand current file name */
count = charcount - 1;
if (count < 0)
count = 0;
/* find front of word */
if (str[count] == _T('"'))
{
count--;
while (count > 0 && str[count] != _T('"'))
count--;
}
else
{
while (count > 0 && str[count] != _T(' '))
count--;
}
/* if not at beginning, go forward 1 */
if (str[count] == _T(' '))
count++;
if (str[count] == _T('"'))
count++;
/* extract directory from word */
_tcscpy (directory, &str[count]);
curplace = _tcslen (directory) - 1;
if (curplace >= 0 && directory[curplace] == _T('"'))
directory[curplace--] = _T('\0');
_tcscpy (path, directory);
while (curplace >= 0 &&
directory[curplace] != _T('\\') &&
directory[curplace] != _T(':'))
{
directory[curplace] = 0;
curplace--;
}
/* look for a . in the filename */
for (count = _tcslen (directory); path[count] != _T('\0'); count++)
{
if (path[count] == _T('.'))
{
found_dot = TRUE;
break;
}
}
if (found_dot)
_tcscat (path, _T("*"));
else
_tcscat (path, _T("*.*"));
/* current fname */
curplace = 0;
hFile = FindFirstFile (path, &file);
if (hFile != INVALID_HANDLE_VALUE)
{
UINT longestfname = 0;
/* Get the size of longest filename first. */
do
{
if (_tcslen(file.cFileName) > longestfname)
{
longestfname = _tcslen(file.cFileName);
/* Directories get extra brackets around them. */
if (file.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
longestfname += 2;
}
}
while (FindNextFile (hFile, &file));
FindClose (hFile);
hFile = FindFirstFile (path, &file);
/* Count the highest number of columns */
GetScreenSize(&screenwidth, NULL);
/* For counting columns of output */
count = 0;
/* Increase by the number of spaces behind file name */
longestfname += 3;
/* find anything */
ConOutChar(_T('\n'));
do
{
/* ignore . and .. */
if (!_tcscmp (file.cFileName, _T(".")) ||
!_tcscmp (file.cFileName, _T("..")))
continue;
if (file.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
_stprintf (fname, _T("[%s]"), file.cFileName);
else
_tcscpy (fname, file.cFileName);
ConOutPrintf (_T("%*s"), - longestfname, fname);
count++;
/* output as much columns as fits on the screen */
if (count >= (screenwidth / longestfname))
{
/* print the new line only if we aren't on the
* last column, in this case it wraps anyway */
if (count * longestfname != (UINT)screenwidth)
ConOutChar(_T('\n'));
count = 0;
}
}
while (FindNextFile (hFile, &file));
FindClose (hFile);
if (count)
ConOutChar(_T('\n'));
}
else
{
/* no match found */
MessageBeep (-1);
return FALSE;
}
return TRUE;
}
#endif
#ifdef FEATURE_4NT_FILENAME_COMPLETION
typedef struct _FileName
{
TCHAR Name[MAX_PATH];
} FileName;
VOID FindPrefixAndSuffix(LPTSTR strIN, LPTSTR szPrefix, LPTSTR szSuffix)
{
/* String that is to be examined */
TCHAR str[MAX_PATH];
/* temp pointers to used to find needed parts */
TCHAR * szSearch;
TCHAR * szSearch1;
TCHAR * szSearch2;
TCHAR * szSearch3;
/* number of quotes in the string */
INT nQuotes = 0;
/* used in for loops */
UINT i;
/* Char number to break the string at */
INT PBreak = 0;
INT SBreak = 0;
/* when phrasing a string, this tells weather
you are inside quotes ot not. */
BOOL bInside = FALSE;
szPrefix[0] = _T('\0');
szSuffix[0] = _T('\0');
/* Copy over the string to later be edited */
_tcscpy(str,strIN);
/* Count number of " */
for(i = 0; i < _tcslen(str); i++)
{
if (str[i] == _T('\"'))
nQuotes++;
}
/* Find the prefix and suffix */
if (nQuotes % 2 && nQuotes >= 1)
{
/* Odd number of quotes. Just start from the last " */
/* THis is the way MS does it, and is an easy way out */
szSearch = _tcsrchr(str, _T('\"'));
/* Move to the next char past the " */
szSearch++;
_tcscpy(szSuffix,szSearch);
/* Find the one closest to end */
szSearch1 = _tcsrchr(str, _T('\"'));
szSearch2 = _tcsrchr(str, _T('\\'));
szSearch3 = _tcsrchr(str, _T('/'));
if ((szSearch2 != NULL) && (szSearch1 < szSearch2))
szSearch = szSearch2;
else if ((szSearch3 != NULL) && (szSearch1 < szSearch3))
szSearch = szSearch3;
else
szSearch = szSearch1;
/* Move one char past */
szSearch++;
szSearch[0] = _T('\0');
_tcscpy(szPrefix,str);
return;
}
if (!_tcschr(str, _T(' ')))
{
/* No spaces, everything goes to Suffix */
_tcscpy(szSuffix,str);
/* look for a slash just in case */
szSearch = _tcsrchr(str, _T('\\'));
if (szSearch)
{
szSearch++;
szSearch[0] = _T('\0');
_tcscpy(szPrefix,str);
}
else
{
szPrefix[0] = _T('\0');
}
return;
}
if (!nQuotes)
{
/* No quotes, and there is a space*/
/* Take it after the last space */
szSearch = _tcsrchr(str, _T(' '));
szSearch++;
_tcscpy(szSuffix,szSearch);
/* Find the closest to the end space or \ */
_tcscpy(str,strIN);
szSearch1 = _tcsrchr(str, _T(' '));
szSearch2 = _tcsrchr(str, _T('\\'));
szSearch3 = _tcsrchr(str, _T('/'));
if ((szSearch2 != NULL) && (szSearch1 < szSearch2))
szSearch = szSearch2;
else if ((szSearch3 != NULL) && (szSearch1 < szSearch3))
szSearch = szSearch3;
else
szSearch = szSearch1;
szSearch++;
szSearch[0] = _T('\0');
_tcscpy(szPrefix,str);
return;
}
/* All else fails and there is a lot of quotes, spaces and |
Then we search through and find the last space or \ that is
not inside a quotes */
for(i = 0; i < _tcslen(str); i++)
{
if (str[i] == _T('\"'))
bInside = !bInside;
if (str[i] == _T(' ') && !bInside)
SBreak = i;
if ((str[i] == _T(' ') || str[i] == _T('\\')) && !bInside)
PBreak = i;
}
SBreak++;
PBreak++;
_tcscpy(szSuffix,&strIN[SBreak]);
strIN[PBreak] = _T('\0');
_tcscpy(szPrefix,strIN);
if (szPrefix[_tcslen(szPrefix) - 2] == _T('\"') &&
szPrefix[_tcslen(szPrefix) - 1] != _T(' '))
{
/* need to remove the " right before a \ at the end to
allow the next stuff to stay inside one set of quotes
otherwise you would have multiple sets of quotes*/
_tcscpy(&szPrefix[_tcslen(szPrefix) - 2],_T("\\"));
}
}
int __cdecl compare(const void *arg1,const void *arg2)
{
FileName * File1;
FileName * File2;
INT ret;
File1 = cmd_alloc(sizeof(FileName));
if (!File1)
return 0;
File2 = cmd_alloc(sizeof(FileName));
if (!File2)
{
cmd_free(File1);
return 0;
}
memcpy(File1,arg1,sizeof(FileName));
memcpy(File2,arg2,sizeof(FileName));
/* ret = _tcsicmp(File1->Name, File2->Name); */
ret = lstrcmpi(File1->Name, File2->Name);
cmd_free(File1);
cmd_free(File2);
return ret;
}
BOOL
FileNameContainsSpecialCharacters(LPTSTR pszFileName)
{
TCHAR chr;
while ((chr = *pszFileName++) != _T('\0'))
{
if ((chr == _T(' ')) ||
(chr == _T('!')) ||
(chr == _T('%')) ||
(chr == _T('&')) ||
(chr == _T('(')) ||
(chr == _T(')')) ||
(chr == _T('{')) ||
(chr == _T('}')) ||
(chr == _T('[')) ||
(chr == _T(']')) ||
(chr == _T('=')) ||
(chr == _T('\'')) ||
(chr == _T('`')) ||
(chr == _T(',')) ||
(chr == _T(';')) ||
(chr == _T('^')) ||
(chr == _T('~')) ||
(chr == _T('+')) ||
(chr == 0xB4)) // '´'
{
return TRUE;
}
}
return FALSE;
}
VOID CompleteFilename (LPTSTR strIN, BOOL bNext, LPTSTR strOut, UINT cusor)
{
/* Length of string before we complete it */
INT_PTR StartLength;
/* Length of string after completed */
//INT EndLength;
/* The number of chars added too it */
//static INT DiffLength = 0;
/* Used to find and assemble the string that is returned */
TCHAR szBaseWord[MAX_PATH];
TCHAR szPrefix[MAX_PATH];
TCHAR szOriginal[MAX_PATH];
TCHAR szSearchPath[MAX_PATH];
/* Save the strings used last time, so if they hit tab again */
static TCHAR LastReturned[MAX_PATH];
static TCHAR LastSearch[MAX_PATH];
static TCHAR LastPrefix[MAX_PATH];
/* Used to search for files */
HANDLE hFile;
WIN32_FIND_DATA file;
/* List of all the files */
FileName * FileList = NULL;
/* Number of files */
INT FileListSize = 0;
/* Used for loops */
UINT i;
/* Editable string of what was passed in */
TCHAR str[MAX_PATH];
/* Keeps track of what element was last selected */
static INT Sel;
BOOL NeededQuote = FALSE;
BOOL ShowAll = TRUE;
TCHAR * line = strIN;
strOut[0] = _T('\0');
while (_istspace (*line))
line++;
if (!_tcsnicmp (line, _T("rd "), 3) || !_tcsnicmp (line, _T("cd "), 3))
ShowAll = FALSE;
/* Copy the string, str can be edited and original should not be */
_tcscpy(str,strIN);
_tcscpy(szOriginal,strIN);
/* Look to see if the cusor is not at the end of the string */
if ((cusor + 1) < _tcslen(str))
str[cusor] = _T('\0');
/* Look to see if they hit tab again, if so cut off the diff length */
if (_tcscmp(str,LastReturned) || !_tcslen(str))
{
/* We need to know how many chars we added from the start */
StartLength = _tcslen(str);
/* no string, we need all files in that directory */
if (!StartLength)
{
_tcscat(str,_T("*"));
}
/* Zero it out first */
szBaseWord[0] = _T('\0');
szPrefix[0] = _T('\0');
/*What comes out of this needs to be:
szBaseWord = path no quotes to the object
szPrefix = what leads up to the filename
no quote at the END of the full name */
FindPrefixAndSuffix(str,szPrefix,szBaseWord);
/* Strip quotes */
for(i = 0; i < _tcslen(szBaseWord); )
{
if (szBaseWord[i] == _T('\"'))
memmove(&szBaseWord[i],&szBaseWord[i + 1], _tcslen(&szBaseWord[i]) * sizeof(TCHAR));
else
i++;
}
/* clear it out */
memset(szSearchPath, 0, sizeof(szSearchPath));
/* Start the search for all the files */
GetFullPathName(szBaseWord, MAX_PATH, szSearchPath, NULL);
/* Got a device path? Fallback to the the current dir plus the short path */
if (szSearchPath[0] == _T('\\') && szSearchPath[1] == _T('\\') &&
szSearchPath[2] == _T('.') && szSearchPath[3] == _T('\\'))
{
GetCurrentDirectory(MAX_PATH, szSearchPath);
_tcscat(szSearchPath, _T("\\"));
_tcscat(szSearchPath, szBaseWord);
}
if (StartLength > 0)
{
_tcscat(szSearchPath,_T("*"));
}
_tcscpy(LastSearch,szSearchPath);
_tcscpy(LastPrefix,szPrefix);
}
else
{
_tcscpy(szSearchPath, LastSearch);
_tcscpy(szPrefix, LastPrefix);
StartLength = 0;
}
/* search for the files it might be */
hFile = FindFirstFile (szSearchPath, &file);
if (hFile == INVALID_HANDLE_VALUE)
{
/* Assemble the original string and return */
_tcscpy(strOut,szOriginal);
return;
}
/* assemble a list of all files names */
do
{
FileName * oldFileList = FileList;
if (!_tcscmp (file.cFileName, _T(".")) ||
!_tcscmp (file.cFileName, _T("..")))
continue;
/* Don't show files when they are doing 'cd' or 'rd' */
if (!ShowAll &&
file.dwFileAttributes != INVALID_FILE_ATTRIBUTES &&
!(file.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY))
{
continue;
}
/* Add the file to the list of files */
FileList = cmd_realloc(FileList, ++FileListSize * sizeof(FileName));
if (FileList == NULL)
{
/* Don't leak old buffer */
cmd_free(oldFileList);
/* Assemble the original string and return */
_tcscpy(strOut,szOriginal);
FindClose(hFile);
ConOutFormatMessage (GetLastError());
return;
}
/* Copies the file name into the struct */
_tcscpy(FileList[FileListSize-1].Name,file.cFileName);
} while(FindNextFile(hFile,&file));
FindClose(hFile);
/* Check the size of the list to see if we found any matches */
if (FileListSize == 0)
{
_tcscpy(strOut,szOriginal);
if (FileList != NULL)
cmd_free(FileList);
return;
}
/* Sort the files */
qsort(FileList,FileListSize,sizeof(FileName), compare);
/* Find the next/previous */
if (_tcslen(szOriginal) && !_tcscmp(szOriginal,LastReturned))
{
if (bNext)
{
if (FileListSize - 1 == Sel)
Sel = 0;
else
Sel++;
}
else
{
if (!Sel)
Sel = FileListSize - 1;
else
Sel--;
}
}
else
{
Sel = 0;
}
/* nothing found that matched last time so return the first thing in the list */
strOut[0] = _T('\0');
/* Special character in the name */
if (FileNameContainsSpecialCharacters(FileList[Sel].Name))
{
INT LastSpace;
BOOL bInside;
/* It needs a " at the end */
NeededQuote = TRUE;
LastSpace = -1;
bInside = FALSE;
/* Find the place to put the " at the start */
for(i = 0; i < _tcslen(szPrefix); i++)
{
if (szPrefix[i] == _T('\"'))
bInside = !bInside;
if (szPrefix[i] == _T(' ') && !bInside)
LastSpace = i;
}
/* insert the quotation and move things around */
if (szPrefix[LastSpace + 1] != _T('\"') && LastSpace != -1)
{
memmove ( &szPrefix[LastSpace+1], &szPrefix[LastSpace], (_tcslen(szPrefix)-LastSpace+1) * sizeof(TCHAR) );
if ((UINT)(LastSpace + 1) == _tcslen(szPrefix))
{
_tcscat(szPrefix,_T("\""));
}
szPrefix[LastSpace + 1] = _T('\"');
}
else if (LastSpace == -1)
{
/* Add quotation only if none exists already */
if (szPrefix[0] != _T('\"'))
{
_tcscpy(szBaseWord,_T("\""));
_tcscat(szBaseWord,szPrefix);
_tcscpy(szPrefix,szBaseWord);
}
}
}
_tcscpy(strOut,szPrefix);
_tcscat(strOut,FileList[Sel].Name);
/* check for odd number of quotes means we need to close them */
if (!NeededQuote)
{
for(i = 0; i < _tcslen(strOut); i++)
{
if (strOut[i] == _T('\"'))
NeededQuote = !NeededQuote;
}
}
if (NeededQuote || (_tcslen(szPrefix) && szPrefix[_tcslen(szPrefix) - 1] == _T('\"')))
_tcscat(strOut,_T("\""));
_tcscpy(LastReturned,strOut);
//EndLength = _tcslen(strOut);
//DiffLength = EndLength - StartLength;
if (FileList != NULL)
cmd_free(FileList);
}
#endif
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