Class: CShadow::CharPointerAttribute

Inherits:
PointerAttribute show all
Defined in:
lib/cgen/attribute.rb

Overview

Stores a null-terminated string

Instance Attribute Summary

Attributes inherited from CNativeAttribute

#ctype

Attributes inherited from Attribute

#cdecl, #check, #cvar, #dump, #free, #init, #load, #mark, #owner_class, #persists, #reader, #var, #writer

Instance Method Summary collapse

Methods inherited from CNativeAttribute

match

Methods inherited from Attribute

inherited, #inspect, match

Constructor Details

#initialize(*args) ⇒ CharPointerAttribute

Returns a new instance of CharPointerAttribute.



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# File 'lib/cgen/attribute.rb', line 367

def initialize(*args)
  super
  @reader =
    "result = shadow->#{@cvar} ? rb_str_new2(shadow->#{@cvar}) : Qnil"
  @writer = %{
    {
      int len;
      char *str;
      
      free(shadow->#{@cvar});

      if (arg == Qnil)
        shadow->#{@cvar} = 0;
      else {
        StringValueCStr(arg);
        len = RSTRING_LEN(arg);
        str = RSTRING_PTR(arg);
        shadow->#{@cvar} = ALLOC_N(char, len + 1);

        if (str)
          memcpy(shadow->#{@cvar}, str, len);

        shadow->#{@cvar}[len] = '\\0';
      }
    }
  }
  @dump = %{
    rb_ary_push(result,
      shadow->#{@cvar} ? rb_str_new2(shadow->#{@cvar}) : 0);
  }
  @load = %{
    {
      VALUE arg = rb_ary_shift(from_array);
      int len;
      char *str;
                
      if (arg == Qnil)
        shadow->#{@cvar} = 0;
      else {
        len = RSTRING_LEN(arg);
        str = RSTRING_PTR(arg);
        shadow->#{@cvar} = ALLOC_N(char, len + 1);

        if (str)
          memcpy(shadow->#{@cvar}, str, len);

        shadow->#{@cvar}[len] = '\\0';
      }
    }
  }
end