Convert VALUE to c types in ruby3

lizhongyou2013 · 2 June 2022 16:16

Tanks for reading.

Dear younger friends, middle-age friends and elder friends,

I am trying to use ruby in c and I've found online that I need to convert type VALUE to c types. The webpage said I need to use something likes FIX2INT in ruby/ruby.h, but I can't find this function (or Macro maybe) in ruby/ruby.h for ruby3.

Where can I get the function? Or maybe I need to use another function for ruby3?

A student name Tsing Hui

Frank_J_Cameron · 2 June 2022 20:49

FIX2INT is defined in: ruby/internal/arithmetic/int.h

#include "ruby/ruby.h"
#include "ruby/internal/arithmetic.h
#include "ruby/internal/arithmetic/int.h"

github.com

ruby/ruby/blob/v3_1_2/doc/extension.rdoc

# extension.rdoc -  -*- RDoc -*- created at: Mon Aug  7 16:45:54 JST 1995

= Creating Extension Libraries for Ruby

This document explains how to make extension libraries for Ruby.

== Basic Knowledge

In C, variables have types and data do not have types.  In contrast,
Ruby variables do not have a static type, and data themselves have
types, so data will need to be converted between the languages.

Data in Ruby are represented by the C type `VALUE'.  Each VALUE data
has its data type.

To retrieve C data from a VALUE, you need to:

1. Identify the VALUE's data type
2. Convert the VALUE into C data

This file has been truncated. show original

···

On 6/2/22, 李钟右 <lizhongyou2013@126.com> wrote:

I am trying to use ruby in c and I've found online that I need to
convert type VALUE to c types. The webpage said I need to use something
likes FIX2INT in ruby/ruby.h, but I can't find this function (or Macro
maybe) in ruby/ruby.h for ruby3.

Where can I get the function? Or maybe I need to use another function
for ruby3?

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Convert VALUE to c types in ruby3

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