PureBasic Forums - English

Posted: **Tue Sep 20, 2022 2:52 pm**

Hi,

I am looking for the quickest way to check if a file exists. I search the forum and find 2 methods:

1) If FileSize(FileName)=-1 ---> file not found
2) if Not(GetFileAttributes(FileName) & #FILE_ATTRIBUTE_DIRECTORY = #False) ---> file not found

Any other suggestions?

Thanks.

Allen

Posted: **Tue Sep 20, 2022 3:07 pm**

On windows, there is a api function available with Purebasic like this:

Code: Select all

Global file$ = "E:\Temp\Source\ExistingFile.txt"  ; <-- change to something usable 
If PathFileExists_(@file$) 
  Debug "YES " 
Else 
  Debug "NO  ErrorCode = 0x" + Hex(GetLastError_())  
EndIf

BTW: I do not understand why you need the quickest way for that?

Posted: **Tue Sep 20, 2022 3:54 pm**

Axolotl,

Thanks for the information.

I wrote a backup program for my own use and I currently use filesize to check if a file is already backup or not. I am trying to improve the backup speed as there are around 400000 files in the backup drive.

I am also considering to use CRC32 or MD5 to create a database of my already backup files to speed up the purpose. To handle updated files, the backuped files name will contain the file modification/creation date. To check if I need to backup D:\User\Phone.txt that has modification date 2022_0813_121323, I shall check if D\User\Phone_2022_0813_121323.txt exist in my backup drive, if not I shall copy it.

Allen

Posted: **Tue Sep 20, 2022 4:23 pm**

Allen,
okay, I see.
Some thoughs:
If you do not (never) touch your backup files accidently, you may use the archive flag as an indicator (on windows)
By use of

Code: Select all

ExamineDirectory()

there is

Code: Select all

DirectoryEntryAttributes()

to get the flags.

Code: Select all

 #PB_FileSystem_Archive   ; File has been changed and not archived since the last time

Otherwise I would compare the modification dates only.
and if they are different ... (you know what to do)
Computing a checksum are much more time consuming than check the existance of a file (i guess).

BTW: There are several tools around. Even some codes about creating lists of files and compare files and so on.
But (on the other hand) I do understand: Where is the fun in using other people's ready made programs.

Happy coding and stay healthy.

Posted: **Tue Sep 20, 2022 4:55 pm**

@Allen
See this "File synchronization"
FastHash64

Posted: **Tue Sep 20, 2022 5:01 pm**

Axolotl,

Thanks a lot for your information. I definitely will study and learn from them.

For me, the most fun part is to learn new things/technique and use them.

Allen

Posted: **Tue Sep 20, 2022 10:24 pm**

This might be useful, use Getfilelist then you can go through and check the attributes

Code: Select all

EnableExplicit 

Structure FileDate 
  Created.i
  Modified.i
  Accessed.i
EndStructure   

Structure File 
  Name.s
  Attributes.i
  Date.FileDate
  Size.q
EndStructure   

Procedure GetFileList(StartDirectory.s,List Lfiles.file(),Pattern.s="*.*",Recursive=1)
  Protected PatternCount,Depth,a,CurrentDirectoryID,Directory.s,TempDirectory.s
  Protected FileAttributes.i,FileSize.i,FileDate.FileDate,FileName.s,FullFileName.s 
  
  Static NewList Lpattern.s()
  Static PatternSet,FileCount 
  
  If Not PatternSet
    Pattern = RemoveString(Pattern,"*.")
    PatternCount = CountString(Pattern,"|") + 1
    ClearList(lpattern())
    For a = 1 To PatternCount 
      AddElement(Lpattern())
      Lpattern() = UCase(StringField(Pattern,a,"|"))
    Next
    PatternSet=1
  ElseIf depth = 0 
    PatternSet = 0
  EndIf 
  
  CurrentDirectoryID = ExamineDirectory(#PB_Any, StartDirectory, "*.*") 
  If CurrentDirectoryID 
    While NextDirectoryEntry(CurrentDirectoryID)
      If DirectoryEntryType(CurrentDirectoryID) = #PB_DirectoryEntry_File
        Directory = StartDirectory
        FileName = DirectoryEntryName(CurrentDirectoryID)
        FileDate\Created = DirectoryEntryDate(CurrentDirectoryID,#PB_Date_Created)
        FileDate\Modified = DirectoryEntryDate(CurrentDirectoryID,#PB_Date_Modified)
        FileDate\Accessed = DirectoryEntryDate(CurrentDirectoryID,#PB_Date_Accessed)
        FileAttributes = DirectoryEntryAttributes(CurrentDirectoryID)
        FileSize = DirectoryEntrySize(CurrentDirectoryID) 
        
        ForEach Lpattern()
          If lpattern() = "*" Or GetExtensionPart(UCase(FileName)) = lpattern()
            FullFileName.s = StartDirectory + FileName 
            AddElement(LFiles()) 
            Lfiles()\Name = FullFileName
            Lfiles()\Date = FileDate 
            Lfiles()\Size = FileSize 
            Lfiles()\Attributes = FileAttributes 
            FileCount+1
          EndIf
        Next  
        
      Else
        TempDirectory = DirectoryEntryName(CurrentDirectoryID)
        If TempDirectory <> "." And TempDirectory <> ".."
          If Recursive = 1
            Depth + 1
            GetFileList(StartDirectory + TempDirectory + #PS$,LFiles(),Pattern,Recursive) 
          EndIf
        EndIf
      EndIf
    Wend
    FinishDirectory(CurrentDirectoryID)
  EndIf
  
  ProcedureReturn FileCount
  
EndProcedure

Procedure SortFileListByDate(List InputFiles.file(),List OutPutFiles.file(),Order=#PB_Sort_Ascending,DateOption=#PB_Date_Modified,StartDate=0,EndDate=$7FFFFFFF)
  
  Select DateOption 
    Case #PB_Date_Modified 
      SortStructuredList(InputFiles(),Order,(OffsetOf(File\Date)+OffsetOf(FileDate\Modified)),#PB_Integer) 
    Case #PB_Date_Accessed 
      SortStructuredList(InputFiles(),Order,(OffsetOf(File\Date)+OffsetOf(FileDate\Accessed)),#PB_Integer)
    Case #PB_Date_Created
      SortStructuredList(InputFiles(),Order,(OffsetOf(File\Date)+OffsetOf(FileDate\Created)),#PB_Integer)
  EndSelect 
  
  If StartDate 
    ForEach InputFiles() 
      Select DateOption 
        Case #PB_Date_Modified 
          If (InputFiles()\Date\Modified >= StartDate And InputFiles()\Date\Modified <= EndDate) 
            AddElement(OutPutFiles()) 
            CopyStructure(@InputFiles(),@OutPutFiles(),File)
          EndIf
        Case #PB_Date_Accessed 
          If (InputFiles()\Date\Modified >= StartDate And InputFiles()\Date\Accessed <= EndDate) 
            AddElement(OutPutFiles()) 
            CopyStructure(@InputFiles(),@OutPutFiles(),File)
          EndIf
        Case #PB_Date_Created 
          If (InputFiles()\Date\Modified >= StartDate And InputFiles()\Date\Created <= EndDate) 
            AddElement(OutPutFiles()) 
            CopyStructure(@InputFiles(),@OutPutFiles(),File)
          EndIf
      EndSelect  
    Next  
  EndIf
  
  ProcedureReturn ListSize(OutPutFiles()) 
  
EndProcedure   

Procedure SortFileListBySize(List InputFiles.file(),List OutPutFiles.file(),Order=#PB_Sort_Ascending,MinimumSize=0,MaximumSize.q=$7FFFFFFFFFFFFFFF) 
  
  SortStructuredList(InputFiles(),Order,OffsetOf(File\Size),#PB_Integer) 
  If MinimumSize 
    ForEach InputFiles() 
      If (InputFiles()\Size >= MinimumSize And InputFiles()\Size <= MaximumSize)
        AddElement(OutPutFiles()) 
        CopyStructure(@InputFiles(),@OutPutFiles(),File)
      EndIf
    Next    
  EndIf 
  
  ProcedureReturn ListSize(OutPutFiles())  
  
EndProcedure  



Global NewList AllFiles.File() 
Global NewList FilteredFiles.File() 
Global NewList ReFilteredFiles.File()
Global StartDate = Date(2014,1,1,0,0,0) 
Global EndDate = Date(2022,12,31,23,59,59)
Global Path.s = #PB_Compiler_Home  


If GetFileList(Path,AllFiles(),"*.pb|*.pbi")  ;get all pb files in the directory recursively  
  
  If SortFileListByDate(Allfiles(),FilteredFiles(),#PB_Sort_Ascending,#PB_Date_Modified,StartDate,EndDate) ;sort and filter by date between dates  
    ForEach FilteredFiles() 
      Debug FilteredFiles()\Name 
      Debug FormatDate("%dd/%mm/%yyyy",FilteredFiles()\Date\Modified) 
    Next
  EndIf 
  
  Debug "++++++++++++++++++++++++++++++++++++++++++++++++++"
  
  If SortFileListBySize(FilteredFiles(),ReFilteredFiles(),#PB_Sort_Descending,10000,100000) ;re-sort and filter by size between sizes 
     ForEach ReFilteredFiles() 
      Debug ReFilteredFiles()\Name 
      Debug Str(ReFilteredFiles()\Size / 1024) + " KB" 
    Next
  EndIf 
  
EndIf

Posted: **Wed Sep 21, 2022 2:58 am**

@Idle,

Thank you for your example, will study and check if it useful to integrate part of it in my program.

Allen

Posted: **Wed Sep 21, 2022 3:06 am**

Just a reminder: PureBasic has had #PS$ for the path separation character for a while now. You don't need to manually specify it:

Code: Select all

CompilerIf #PB_Compiler_OS = #PB_OS_Windows 
  #Cdir = "\" 
CompilerElse 
  #Cdir = "/"
CompilerEndIf 

Debug #Cdir
Debug #PS$

Posted: **Wed Sep 21, 2022 3:29 am**

BarryG wrote: Wed Sep 21, 2022 3:06 am Just a reminder: PureBasic has had #PS$ for the path separation character for a while now. You don't need to manually specify it:
Code: Select all
CompilerIf #PB_Compiler_OS = #PB_OS_Windows 
  #Cdir = "\" 
CompilerElse 
  #Cdir = "/"
CompilerEndIf 

Debug #Cdir
Debug #PS$

Thanks for that updated the listing above

Posted: **Wed Sep 21, 2022 10:26 am**

BarryG wrote: Wed Sep 21, 2022 3:06 am Just a reminder: PureBasic has had #PS$...

Thanks! I did not know

Posted: **Mon Sep 26, 2022 4:51 pm**

Maybe you could try Everything's SDK? (https://www.voidtools.com/)

Saso

Posted: **Mon Sep 26, 2022 11:32 pm**

Voidtools Everything sdk On windows "The Bee`s Knee`s" https://www.voidtools.com/support/everything/sdk/

Zebuddi.

all procs available in dll + lib
Current Ver:1.4.1.1015
1. Everything_CleanUp
2. Everything_DeleteRunHistory
3. Everything_Exit
4. Everything_GetBuildNumber
5. Everything_GetLastError
6. Everything_GetMajorVersion
7. Everything_GetMatchCase
8. Everything_GetMatchPath
9. Everything_GetMatchWholeWord
10. Everything_GetMax
11. Everything_GetMinorVersion
12. Everything_GetNumFileResults
13. Everything_GetNumFolderResults
14. Everything_GetNumResults
15. Everything_GetOffset
16. Everything_GetRegex
17. Everything_GetReplyID
18. Everything_GetReplyWindow
19. Everything_GetRequestFlags
20. Everything_GetResultAttributes
21. Everything_GetResultDateAccessed
22. Everything_GetResultDateCreated
23. Everything_GetResultDateModified
24. Everything_GetResultDateRecentlyChanged
25. Everything_GetResultDateRun
26. Everything_GetResultExtensionA
27. Everything_GetResultExtensionW
28. Everything_GetResultFileListFileNameA
29. Everything_GetResultFileListFileNameW
30. Everything_GetResultFileNameA
31. Everything_GetResultFileNameW
32. Everything_GetResultFullPathNameA
33. Everything_GetResultFullPathNameW
34. Everything_GetResultHighlightedFileNameA
35. Everything_GetResultHighlightedFileNameW
36. Everything_GetResultHighlightedFullPathAndFileNameA
37. Everything_GetResultHighlightedFullPathAndFileNameW
38. Everything_GetResultHighlightedPathA
39. Everything_GetResultHighlightedPathW
40. Everything_GetResultListRequestFlags
41. Everything_GetResultListSort
42. Everything_GetResultPathA
43. Everything_GetResultPathW
44. Everything_GetResultRunCount
45. Everything_GetResultSize
46. Everything_GetRevision
47. Everything_GetRunCountFromFileNameA
48. Everything_GetRunCountFromFileNameW
49. Everything_GetSearchA
50. Everything_GetSearchW
51. Everything_GetSort
52. Everything_GetTargetMachine
53. Everything_GetTotFileResults
54. Everything_GetTotFolderResults
55. Everything_GetTotResults
56. Everything_IncRunCountFromFileNameA
57. Everything_IncRunCountFromFileNameW
58. Everything_IsAdmin
59. Everything_IsAppData
60. Everything_IsDBLoaded
61. Everything_IsFastSort
62. Everything_IsFileInfoIndexed
63. Everything_IsFileResult
64. Everything_IsFolderResult
65. Everything_IsQueryReply
66. Everything_IsVolumeResult
67. Everything_QueryA
68. Everything_QueryW
69. Everything_RebuildDB
70. Everything_Reset
71. Everything_SaveDB
72. Everything_SaveRunHistory
73. Everything_SetMatchCase
74. Everything_SetMatchPath
75. Everything_SetMatchWholeWord
76. Everything_SetMax
77. Everything_SetOffset
78. Everything_SetRegex
79. Everything_SetReplyID
80. Everything_SetReplyWindow
81. Everything_SetRequestFlags
82. Everything_SetRunCountFromFileNameA
83. Everything_SetRunCountFromFileNameW
84. Everything_SetSearchA
85. Everything_SetSearchW
86. Everything_SetSort
87. Everything_SortResultsByPath
88. Everything_UpdateAllFolderIndexes

Posted: **Mon Sep 26, 2022 11:34 pm**

viewtopic.php?p=578469&hilit=voidtools#p578469

Posted: **Tue Sep 27, 2022 1:47 am**

miskox, Zebuddi123,

Thanks a lot for the information. Definitely will try to test use them.

Allen

PureBasic Forums - English

Quickest way to find if a file exist in win OS

Quickest way to find if a file exist in win OS

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