method

convertible_int

ruby latest stable - Class: Object

convertible_int(type, headers = nil, opts = nil, &b)

public

Returns the convertible integer type of the given type. You may optionally specify additional headers to search in for the type. Convertible means actually same type, or typedefed from same type.

If the type is a integer type and convertible type is found, following macros are passed as preprocessor constants to the compiler using the type name, in uppercase.

‘TYPEOF_’, followed by the type name, followed by ‘=X’ where ‘X’ is the found convertible type name. * ‘TYP2NUM’ and ‘NUM2TYP, where ’TYP’ is the type name in uppercase with replacing ‘_t’ suffix with ‘T’, followed by ‘=X’ where ‘X’ is the macro name to convert type to Integer object, and vice versa.

For example, if foobar_t is defined as unsigned long, then convertible_int(“foobar_t”) would return “unsigned long”, and define macros:

#define TYPEOF_FOOBAR_T unsigned long
#define FOOBART2NUM ULONG2NUM
#define NUM2FOOBART NUM2ULONG

# File lib/mkmf.rb, line 1210
def convertible_int(type, headers = nil, opts = nil, &b)
  type, macname = *type
  checking_for("convertible type of #{type}", STRING_OR_FAILED_FORMAT) do
    if UNIVERSAL_INTS.include?(type)
      type
    else
      typedef, member, prelude = typedef_expr(type, headers, &b)
      next unless signed = try_signedness(typedef, member, [prelude])
      u = "unsigned " if signed > 0
      prelude << "extern rbcv_typedef_ foo();"
      compat = UNIVERSAL_INTS.find {|t|
        try_compile([prelude, "extern #{u}#{t} foo();"].join("\n"), opts, :werror=>true, &b)
      }
      if compat
        macname ||= type.sub(/_(?=t\z)/, '').tr_cpp
        conv = (compat == "long long" ? "LL" : compat.upcase)
        compat = "#{u}#{compat}"
        $defs.push(format("-DTYPEOF_%s=%s", type.tr_cpp, compat.quote))
        $defs.push(format("-DPRI_%s_PREFIX=PRI_%s_PREFIX", macname, conv))
        conv = (u ? "U" : "") + conv
        $defs.push(format("-D%s2NUM=%s2NUM", macname, conv))
        $defs.push(format("-DNUM2%s=NUM2%s", macname, conv))
        compat
      end
    end
  end
end

convertible_int

Method deprecated or moved

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