function SeekEoln ( {var FileHandle : File} ) : Boolean;
Description
The SeekEoln procedure skips past white space characters in the current record in an open text file given by FileHandle.
The file must have been assigned with AssignFile and opened with Reset.
If the end of line (Eoln) of the end of file (Eof) is thereby reached, the return value is True.
This function is normally used when reading unknown numbers of fields in a record in a file.
Notes
SeekEoln is very similar to SeekEof - the only difference is that SeekEof only returns true when Eof is reached; SeekEoln also returns true when the line end is reached after skipping the white spaces.
Related commands
Eof Returns true if a file opened with Reset is at the end
Eoln Returns true if the current text file is pointing at a line end
File Defines a typed or untyped file
FilePos Gives the file position in a binary or text file
Seek Move the pointer in a binary file to a new record position
SeekEof Skip to the end of the current line or file
Example code : Reading all fields in a record in a text file
var
myFile : TextFile;
number : Integer;
begin
// Try to open the Test.txt file for writing to
AssignFile(myFile, 'Test.txt');
ReWrite(myFile);
// Write numbers in a string
WriteLn(myFile, '1 2 3 4 '); // White space at the end
// Write numbers as separate parameters
WriteLn(myFile, 5, ' ', 6, ' ', 7, ' '); // Results in '5 6 7 ' text
// Close the file
CloseFile(myFile);
// Reopen the file for reading
Reset(myFile);
// Display the file contents
while not SeekEof(myFile) do
begin
// Read numbers one at a time
ShowMessage('Start of a new line');
while not SeekEoln(myFile) do
begin
Read(myFile, number);
ShowMessage(IntToStr(number));
end;
// Now move to the next line
ReadLn(myFile);
end;
// Close the file for the last time
CloseFile(myFile);
end;
Show full unit code
Start of a new line
1
2
3
4
Start of a new line
5
6
7