Thread: Searching for newline on the end of line text

Hy everyone,

I've searched high and low for the answer to this but am unable to find a decent answer. The problem is simple, however, I am not a C programmer and its giving me migrane on how to do this.

What I want to achive is simple:
- I have a string, within, serveral lines of texts.
- I need to find out, if the last character in the entire text is a newline.
- if so, i need to add a string starting without a newline
- of not, i need to add a string starting with a newline.

I cannot seem to find a manner in how to verify the last character is newline or not. Remeber, the might be several newlines in the text present, I'm only intrested in the last newline.

If anyone has any thoughts on this I would really appreciate it!

ftell( ) with SEEK_END will move your file pointer to the last char in the file.

Now "walk" (move the file pointer), backward, until you reach the first char. If it's a newline, then just write your string.

If it's not a newline, then write a newline, then write your string.

An example of using ftell() in this way is here:

Last line of a data file not wanted to be read in and the while statement

You can use the regexp functions regcomp() and regexec() to filter strings that end in a newline.

Originally Posted by Prelude

What? You guys must be smoking something good to read so far between the lines, because this seems sufficient to me

ROTFLOL

Originally Posted by Prelude

Code:

if (s[len - 1] == '\n') {
  /* Append a newline first */
}
else {
  /* Don't append a newline */
}

Yup! that one's the best.

Originally Posted by Prelude

>ftell( ) with SEEK_END will move your file pointer to <blah blah blah>
>You can use the regexp functions regcomp() and regexec() to filter strings that end in a newline.
What? You guys must be smoking something good to read so far between the lines, because this seems sufficient to me:

Code:

if (s[len - 1] == '\n') {
  /* Append a newline first */
}
else {
  /* Don't append a newline */
}

Thank you so much for this! I already tried something like this but had the structure and everything completely messed up! :P All other examples where like 30+ lines of code and i could not believe that it needed te be that difficult