#CLI Progress
This is a simple library to create and display command-line progress bars in C.
##Important parts
The main idea is to overwrite the output file with new information every time a particular step is reached. I accomplished this using the VT100 emulator hack from this Stack Overflow answer. In a nutshell, printing ^[[2K to stdout erases the current line, but it doesn't necessarily move the cursor to the start. Printing \r does that. Also, I decided I wanted to print a newline character after the progress indicator, but I need to get rid of that newline on the next print. That's what \b does: it inserts a backspace, deleting the last character printed.
Also important is the call to fflush, which will guarantee that the print operation completes and is visible before the program moves on to its next task (see this Stack Overflow answer).
##Less important parts
I decided to let the progress function manage its own internal buffers, which are dynamically allocated. Therefore, it is necessary to call cli_progress_release to prevent memory leaks.
I also decided to go ahead and print an extra newline character in the first cli_progress_print call. Otherwise the first \b printed would delete the previous line from the output, which is allowed but not usually expected.
##TODO
Add an interface that allows the user to allocate their own buffers, which would make the library more useful for embedded systems.