mirror of
https://github.com/reactos/reactos.git
synced 2024-10-30 03:27:31 +00:00
92 lines
3.8 KiB
Plaintext
92 lines
3.8 KiB
Plaintext
Made by Vicmarcal 23/11/08
|
||
|
||
THIS FILE HELPS TO EXPLAIN HOW REN IS NOW IMPLEMENTED.
|
||
****************************************************************
|
||
(Please change or add latest modifications)
|
||
****************************************************************
|
||
Before detailing the Rem code just 3 things:
|
||
|
||
1)Ren can be used in 3 different ways:
|
||
|
||
WAY #1:Full Path Way:
|
||
ren c:\ie\hello.txt c:\ie\hi.txt
|
||
|
||
rename command will change the name of hello.txt->hi.txt. We have to be sure that both paths(c:\ie\ ) be the same.Since rename cant move files within Directories (MSDN).
|
||
|
||
WAY #2:Semi Path Way:
|
||
ren c:\ie\hello.txt hi.txt
|
||
|
||
This is a special feature,since this does the same as Way #1 but without telling the Destiny path.So this feature must be implemented also.
|
||
|
||
WAY #3: Just file
|
||
ren hello.txt hi.txt
|
||
|
||
So it changes the name of hello.txt in the current directory.
|
||
|
||
2)Also can be used Wildcards.So be careful ;)
|
||
|
||
3)Syntax errors:
|
||
|
||
-Way #1 with different Subdirectories path: ren c:\ie\hello.txt c:\hi\hi.txt, this is not possible.Since ren doesnt move files,just rename them.
|
||
-Way #2 semi path in destiny: ren hello.txt c:\ie\hi.txt. This feature isnt available.
|
||
|
||
|
||
**************************************************
|
||
Explaining code:
|
||
|
||
|
||
srcPattern: here is stored Source Argument (C:\ie\hello.txt)
|
||
srcPath: here is stored Source Path(C:\ie)
|
||
srcFILE: here is stored FILE name(hello.txt)
|
||
|
||
dstPattern: here is stored Destiny Argument (C:\ie\hi.txt)
|
||
dstPath: here is stored Destiny Path(C:\i)
|
||
dstFILE: here is stored FILE re-name(hi.txt)
|
||
|
||
1)We begin retrieving arguments from command line and fulffilling dstPattern and srcPattern
|
||
|
||
|
||
2)If srcPattern contains "\" then:
|
||
-we activate bPath, since srcPattern has a path inside of it.
|
||
-we explit the srcPattern to srcFile and srcPath.
|
||
-Now we check the dstPattern ¿does it contain a Path?:
|
||
-If does: we divide it in dstPath and dstFile.AND ALSO CHECK THAT dstPath and srcPath it´s the same(see syntax error).If they aren the same we launch an error.
|
||
-If doesnt then we copy srcPath to dstPath(see #way2) and also saving dstPattern as dstFile.
|
||
3)If srcPattern doesnt contain "\" then:
|
||
-srcPattern is copied in srcFile(we dont need a previous split,because it´s just a name)
|
||
-Now we check the dstPattern ¿does it contains a Path?
|
||
-If does: we launch an error (see syntax error 2)
|
||
-If doesnt: we copy dstPattern to dstFile(we dont need a previous split because it´s just a name)
|
||
|
||
4)Now we are entering in the do...while:
|
||
|
||
"p" will store a REAL name file(It uses f.cFileName)
|
||
Real name file is the name that FindFile returns us.FindFile return NULL if it doesnt find the Source File that we want to rename.And returns the name if finds it.
|
||
|
||
Do while is used to manage Wildcards.So we can iterate Finding all the files with the Wildcards in it.
|
||
But wildcards (? and *) has different behavior so we have to be carefull.
|
||
|
||
"q" stores the srcFile(this can be a real name file but ALSO A NAME FULL OF WILDCARDS)(p always has a REAL NAME)(This is the most difficult point to understand the code)
|
||
"r" is the Name File after aplying the Mask (q)(it´s stored in dstLast).
|
||
|
||
If we are just renaming one file,then we dont make the while loop.The do..while loop is made when some files are renamed: i.e ren *.lol *.rem
|
||
|
||
5)Now we have to check our Boolean.
|
||
|
||
bPath==TRUE means that Source Argument was a Path so now we have to Join again the Path with the Name File:
|
||
-srcFINAL: srcPath+f.cFileName
|
||
-dstFINAL: dstPath+dstFile
|
||
bPath==False then Souce wasn a Path an we dont need to join anything.
|
||
-srcFINAL:f.cFileName
|
||
-dstFINAL:dstFile
|
||
|
||
|
||
At last we just make a MoveFile(srcFinal, dstFinal)):
|
||
|
||
Also there are a Bunch of Flags (the options)
|
||
.It makes the code more difficult to understand.But they are just option flags that show or hides errors,that prevents system files to be renamed...and so.
|
||
|
||
|
||
|
||
|