Appending File Extension

[Bieb]

What's the best way to check and see if a string has a given extension (like .bmp) at the end of it and append that extension if it doesn't?

[Faiseur]

Hi,

It is simple if you use the API "PathAddExtension":

Code Select Expand


fn PathAddExtension, addr String, ".bmp"


Note:

a.if the String have an extension, no extension is added.

b. If the String no have extension, extension is added.

:-)


Add:
include shlwapi.inc
includelib shlwapi.lib


If you want to remove the extension (if there is...) use "PathRemoveExtension" (invoke PathRemoveExtension,addr String)

[Bieb]

Wow, that's great.  Thanks.

[Tedd]

Hacky way:
- get string length
- check that last four characters = ".bmp"
- if not, append them :wink

[sluggy]

What's the best way to check and see if a string has a given extension (like .bmp) at the end of it and append that extension if it doesn't?

Ahhhh, but what is an extension? "yourfile.bmp.bmp.bmp" is a perfectly legal name, as is "yourfile.areallylongextension", as is "afilenamewithnoextensionatall".

Sorry, couldn't resist going all Zen, "keepin' it real" as Ali G would say  :cheekygreen: :eek

[Tedd]

What's the best way to check and see if a string has a given extension (like .bmp) at the end of it and append that extension if it doesn't?

Ahhhh, but what is an extension? "yourfile.bmp.bmp.bmp" is a perfectly legal name, as is "yourfile.areallylongextension", as is "afilenamewithnoextensionatall".

Sorry, couldn't resist going all Zen, "keepin' it real" as Ali G would say :cheekygreen: :eek

Aaah, but the question is, little grasshopper, whether the file has a particular extension - "blah.bmp.bmp.blah.bmp" is a perfectly legitimate filename, and it ends with ".bmp" which makes it a bmp file (as far as windows is concerned.)

[P1]

Not every file that ends in .bmp is a bmp format file. 

Regards,  P1  :8)

[Tedd]

Not every file that ends in .bmp is a bmp format file.

That's why I said "(as far as windows is concerned)"  :P

Obviously you can't tell until you actually open it and check its format.

[RuiLoureiro]

Ahhhh, but what is an extension? "yourfile.bmp.bmp.bmp" is a perfectly legal name, as is "yourfile.areallylongextension", as is "afilenamewithnoextensionatall".

Sluggy, but he can test all .bmp begining at the end until the last «.». Why not ?

[pbrennick]

I have a telephone in the parlor and another in  the bedroom.  The one in the bedroom is an extension.

Paul

[thomasantony]

Hi,
  Since it is 4 chars get the last DWORD from the buffer i na register. Do a

Code Select Expand


cmp eax,'pmb.' ; .bmp in reverse due to intel byte ordering


Thomas

[QvasiModo]

There's also PathRemoveExtension and PathReplaceExtension to prevent duplicated extensions.