asfenmall.blogg.se - How to write c code within ruby

#How to write c code within ruby how to

This is made possible by the RubyInline gem, which can be installed using the command: The first approach we’ll look at is including inline C++ code in a Ruby script. This post looks at several ways we can extend Ruby using native code:įor each of these, we’ll work through an example, look at some pros and cons, and the degree to which C++ is supported. The Definitive Guide to Ruby’s C API goes into much more detail about this (and much more).

Check_Type(obj, T_STRING) - raises a TypeError (in the Ruby VM) unless obj is a String.

RB_TYPE_P(obj, T_STRING) - returns true if obj is a String.

For example the following two macros can be used for type-checking: The Ruby C API also includes some macros for working with VALUEs. This is so that you can pass it as an argument to other Ruby API functions.

Whenever you define a Ruby class or module, you will want to assign it to a VALUE variable in your C/C++ code.

Ruby values, which are dynamically typed, are represented in C using a data type called VALUE.

For this post, here are some key concepts that you will find useful: This API is extensive enough that, for most projects, you will only need to use a small portion of it. It is also important to be familiar with the Ruby C API. If nothing else, remember that when you write a Ruby extension in C or C++, you are essentially injecting concepts into a shamelessly object-oriented programming environment.

Since Ruby is a dynamicly-typed, object-oriented language, with garbage collection built into the VM, it requires a different kind of thinking than regular C++ development. As C++ programmers, what do we need to know to write high quality Ruby extensions? Ruby Throughout this post, we’ll look at several examples, all of which are available on Github.

#How to write c code within ruby how to

This post takes the idea a step further, and looks at how to extend Ruby with C++. We saw how C can be used to enhance the functionality of the Ruby language. In my previous post, I covered the basics of writing a Ruby gem with native extensions.