You are now starting to understand that it will get tricky to read data from a file descriptor if you don’t know its size beforehand. What size should your buffer be? How many times do you need to read the file descriptor to retrieve the data ? It is perfectly normal and natural that, as a programmer, you would want to read a “line” that ends with a line break from a file descriptor. For example each command that you type in your shell or each line read from a flat file. Thanks to the project get_next_line, you will finally be able to write a function that will allow you to read a line ending with a newline character from a file descriptor. You’ll be able to add this function to your libft if you feel like it and most importantly, use it in all the future projects that will require it. This project will not only allow you to add a very convenient function to your collection, but it will also allow you to learn a highly interesting new concept in C programming: static variables. You will also gain a deeper understanding of allocations, whether they happen on the stack memory or in the heap memory, the manipulation and the life cycle of a buffer, the unexpected complexity implied in the use of one or many static variables. Your respect of the Norm will improve the rigor of your programming. We also suspect that your approach to coding will change when you will discover that the initial state of a variable in a function can vary depending on the call of that very function.
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Function that read a line from a file descriptor 📖
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