This project is about programming a function that returns a line read from a file descriptor or standard input. Here a new concept is introduced: static variables.
- Repeated calls (e.g., using a loop) to your get_next_line() function should let you read the text file pointed to by the file descriptor, one line at a time.
- Your function should return the line that was read. If there is nothing else to read or if an error occurred, it should return NULL.
- Make sure that your function works as expected both when reading a file and when reading from the standard input.
- Please note that the returned line should include the terminating \n character, except if the end of file was reached and does not end with a \n character.
- Your header file get_next_line.h must at least contain the prototype of the get_next_line() function.
- Add all the helper functions you need in the get_next_line_utils.c file.
- Because you will have to read files in get_next_line(), add this option to your compiler call: -D BUFFER_SIZE=n It will define the buffer size for read(). The buffer size value will be modified by your peer-evaluators and the Moulinette in order to test your code.
- You will compile your code as follows (a buffer size of 42 is used as an example): cc -Wall -Wextra -Werror -D BUFFER_SIZE=42 .c
- We consider that get_next_line() has an undefined behavior if the file pointed to by the file descriptor changed since the last call whereas read() didn’t reach the end of file.
- We also consider that get_next_line() has an undefined behavior when reading a binary file. However, you can implement a logical way to handle this behavior if you want to.
- lseek() is forbidden.
- Global variables are forbidden.