read file extension
Author
hey guys, i am reading a file wich looks like this:
--------
Items: 4
001.jpg
002.jpg
003.jpg
004.jpg
--------
But when i read the picname, i want to extract the file extension. (e.g. bmp, jpg, tiff, psd) How do i read the file extension?
I am searching for an implementation which lowercases the string, and then searches for the extension of the file.
Greetz
Xces
[edited by - Xces on April 20, 2002 2:02:11 PM]
I''m sure there is a better way to do it then what I am going to show you, but I just don''t know that way yet.
I think that would work, or atleast give you a push in the right direction.
char *filename = "Something.jpg";char extension [4];int length;length = strlen(filename);extension[0] = filename[length-3];extension[1] = filename[length-2];extension[2] = filename[length-1];extension[3] = ''\0''; I think that would work, or atleast give you a push in the right direction.
The above ought to work. Just make sure all the extensions are 3 chars long.
Later,
ZE.
//email me.//zealouselixir software.//msdn.//n00biez.//
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Later,
ZE.
//email me.//zealouselixir software.//msdn.//n00biez.//
miscellaneous links
[if you have a link proposal, email me.]
Include the period and use strstr(filename,".jpg"). That''ll work if ".jpg" isn''t anywhere else in the string. Even if it is, strstr returns the position the string was found at, or NULL if it wasn''t found.
To put it in lower case just do
remember to include stdlib.h(cstdlib) or ctype.h(cctype)
[edited by - gregs on April 20, 2002 2:45:00 PM]
for(int ct=0; ct<strlen(str); ct++)str[ct]=tolower(str[ct]); remember to include stdlib.h(cstdlib) or ctype.h(cctype)
[edited by - gregs on April 20, 2002 2:45:00 PM]
try strlwr(filename) first. It''s easier than lowering each character. 
------------------------------
Baldur K
"Hey! I hate these Microsoft guys! What a rotten compiler! It only accepts 16,384 local variables in a function!"
------------------------------
Baldur K
"Hey! I hate these Microsoft guys! What a rotten compiler! It only accepts 16,384 local variables in a function!"
Author
Ok, i think i found another way of doing it ...
My idea is to copy all from the . to the end of the string to read the file extension.
How to continue?
// Extension searchchar *pdest;int result;int dot=''.'';// Convert to lowercasestrlwr(picname);// Find last occurence of the "."pdest = strrchr( picname, dot );result = pdest - picname + 1; My idea is to copy all from the . to the end of the string to read the file extension.
How to continue?
quote:Original post by baldurk
try strlwr(filename) first. It''s easier than lowering each character.
The strlwr function is not standard, and many compilers don''t include it.
Author
true true, but i am making my app in C++ 7, and it only has to run on my computer. Any suggestions on that code above?
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