Second week report

Next week's work

All the objectives that I had specified for the Ruby Grant application final term report except the creating unions and enums have been met.

Rubex can now use code from external C libraries.

For example, to use the RSTRING_LEN macro from the ruby.hheader file in a method, the following code snippet can be used:

lib ruby do
  double RSTRING_LEN(object)
end

def blank?(string)
  i32 i = 0
  char *s = string
  i32 length = RSTRING_LEN(string)

  while i < length do
    if s[i] != ' '
      return false
    end

    i += 1
  end

  return true
end

Notice the lib ruby block. Inside that block you specify the argument and return types of the macro, and then you can easily use it inside any Rubex method (as has been used in the blank? method below.

Similar code can be used for wrapping code from any C library. For example, in order to wrap math.h header file:

lib math do
  double cos(double)

  struct exception do
    int type
    char *name
  end

  double pow(double, double)

  alias exec = struct exception
end

def maths(double a, double b, c)
  alias int_64 = i64
  int_64 p = cos(a)
  int_64 rr

  rr = 332

  exec e
  e.type = 3

  struct new_struct do
    double a,b,c
    char* str
  end

  new_struct s
  s.a = a
  s.b = b

  if (s.a > s.b)
    s.str = c
  end

  return pow(6.7, s.a)
end

The above file will generate C code like this.

v0dro/weekly_report2.md

Next week's work