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Get_next_line

Gnl is a reimplementation of the get_line() function

This function reads one line at a time from a given file descriptor, writes this line
into a dynamically allocated memory area and returns a pointer to this area.

This implementation enables to read the data from multiple files simultaniously, in any order, while “remembering” current position in files.

• The line is a series of characters, which end with a '\n'
• The line returned is null-terminated (there is no new-line character).
• By calling the function in a loop, it will read the contents of a file given as an argument or stdin untill the EoF (ctrl + D) signal is sent.

to prevent memory leaks, the user must free(line) after each call to get_next_line()

• The function returns 1 if a line has been read
• The function returns 0 if a file has been read (EoF)
• The function returns -1 on error

The prototype is as follows:

int get_next_line(const int fd, char **line);

where

• fd - file descriptor of a desired file
• ** line - pointer to the memory area where the contents of a line will be stored

Usage

To test the code, run sh compile.sh.
This will make, link the library and will produce test_gnl executable file.
to run use ./gnl_test *read* or ./gnl_test to read from stdin

To use the function in the program, call it according to its prototype.