• State Not Answered
  • Locked Locked
  • Replies 5 replies
  • Subscribers 21 subscribers
  • Views 1360 views
  • Users 0 members are here
2025 survey

We are running a survey to help us improve the experience for all of our members. If you see the survey appear, please take the time to tell us about your experience if you can.

Options
Related
How was your experience today?
This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

RL-FlashFS: How to determine the length of a file

Marco Becker

Hi all,

when I try to determine the lenhth of a file I use following code:

int  flength(char *filename)
{
FILE* file;
FINFO info;

  file = fopen(filename,"r");
  if(!file)
  {
    return(-1);
  }
  fclose(file);

  info.fileID = 0;
  while(ffind(filename, &info)==0);
  if(info.fileID == 0)
  {
    return(-1);
  }

  return(info.size);

}

All works fine as long as I use simple filenames like "F:test.txt".
As soon as I try to do this with filenames including subfolders ("F:\\test\\test.txt") it fails.

Is there another way to determine the length of a file?
Why won't ffind() not work with subfolders?

Any ideas?
Marco

Parents
  • 0

    Flash-FS rules for file names are rather confusing.
    This is what I once got from Keil support:

    "The filename case handling was described by the developers like that:

    - if name is less than or equal 8 characters and extension less or equal to 3 and only one case characters, (all lower or all upper) file is coded as short filename which only contains upper cases letters so:
    test.txt => TEST.TXT
    TEST.TXT => TEST.TXT

    - if case of letters are mixed it is automatically considered a long filename and filename is encoded as it was written Test.txt => Test.txt teSt.txt => teSt.txt

    - if there are more than 8 characters in filename or more than 3 in extension or more . (dots) in filename it is encoded as long filename

    - filename Test.txt is different than filename tEst.txt as they are both long and encoded as they were written

    "

Reply
  • 0

    Flash-FS rules for file names are rather confusing.
    This is what I once got from Keil support:

    "The filename case handling was described by the developers like that:

    - if name is less than or equal 8 characters and extension less or equal to 3 and only one case characters, (all lower or all upper) file is coded as short filename which only contains upper cases letters so:
    test.txt => TEST.TXT
    TEST.TXT => TEST.TXT

    - if case of letters are mixed it is automatically considered a long filename and filename is encoded as it was written Test.txt => Test.txt teSt.txt => teSt.txt

    - if there are more than 8 characters in filename or more than 3 in extension or more . (dots) in filename it is encoded as long filename

    - filename Test.txt is different than filename tEst.txt as they are both long and encoded as they were written

    "

Children