OpenEuphoria

Re: Trying to concatenating strings to a file path

• Posted by ghaberek (admin) in May
• 514 views

I would lean a bit more into the standard library routines.

--Prompt the user to enter a directory path 
puts(1, "Please enter the directory path: " & "\n") 
-- Read the entered path 
sequence input_path = gets(0) 
input_path = head(input_path, length(input_path)-1) 

You can use prompt_string() here to request input from the user. This automatically strips the newline added by gets().

include std/console.e 
--Prompt the user to enter a directory path 
sequence input_path = prompt_string("Please enter the directory path: ") 

-- ???? ?? ?? ??????? ??????? ???? ?????? ???? 
regex backslash_re = re:new (`\\`)         
sequence words = re:split(backslash_re,input_path) 
sequence directory_name = words[length(words)] 

The split() function in std/regex.e is a bit heavy-handed and should only be used when you need to split using a pattern. You can use the split() function in std/sequence.e when your delimiter is static (i.e. not a pattern).

Also note that I am using the SLASH constant from std/filesys.e instead of hard-coding the backslash character. This is helpful for creating portable code and to avoid confusion about escape characters.

include std/filesys.e 
include std/sequence.e 
sequence words = stdseq:split(input_path, SLASH) 
sequence directory_name = words[$] 

Better yet, if all you want is the "name" from a path, use the filename() function in std/filesys.e. It will return the name of the last item in the path as long as the path does not end in a slash.

include std/filesys.e 
include std/text.e 
input_path = text:trim_tail(input_path, SLASH) 
sequence directory_name = filesys:filename(input_path) 

-- ????? ?? ????? ???? - ???? 
sequence asm_=".asm" 
sequence output_filename = input_path&"\\"&directory_name & asm_ 
puts(1 ,output_filename ) 

I would recommend either concatenating the strings with the SLASH constant or using join_path() from std/filesys.e. Although I think join_path() still erroneously adds a leading slash to the returned path on Windows. You may need to trim that off for the time being.

include std/filesys.e 
sequence output_filename = input_path & SLASH & directory_name & SLASH & asm_ 
-- or -- 
include std/filesys.e 
include std/text.e 
sequence output_filename = filesys:join_path({input_path,directory_name,asm_}) 
output_filename = text:trim_head(output_filename, SLASH) 

-- ???? ????? ????? ??????? 
file_list = dir(input_path & "\\*.vm") 

Same as above, it's much easier to concatenate with the SLASH constant.

include std/filesys.e 
file_list = dir(input_path & SLASH & "*.vm") 

function remove_extension(sequence file_name) 
    regex dot_re = re:new (".")         
    sequence remove_vm = re:split(dot_re, file_name) 
    return remove_vm[1] 
end function 

You can use the filebase() function in std/filesys.e to get just the "base" name of the file without the extension.

include std/filesys.e 
function remove_extension(sequence file_name) 
    return filesys:filebase(file_name) 
end function 

If you want the full path and file name without extension, you could concatenate them together like this.

include std/filesys.e 
function remove_extension(sequence file_name) 
    return filesys:pathname(file_name) & SLASH & filesys:filebase(file_name) 
end function 

Hope that helps.

-Greg