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use std::mem; use std::convert::From; use rubysys::constant; use rubysys::types::{InternalValue, RBasic}; const SPECIAL_SHIFT: usize = 8; #[cfg(not(target_arch = "x86_64"))] pub enum RubySpecialConsts { False = 0, True = 0x02, Nil = 0x04, Undef = 0x06, } #[cfg(not(target_arch = "x86_64"))] pub enum RubySpecialFlags { ImmediateMask = 0x03, FixnumFlag = 0x01, FlonumMask = 0x00, FlonumFlag = 0x02, SymbolFlag = 0x0e, } #[cfg(target_arch = "x86_64")] pub enum RubySpecialConsts { False = 0, True = 0x14, Nil = 0x08, Undef = 0x34, } #[cfg(target_arch = "x86_64")] pub enum RubySpecialFlags { ImmediateMask = 0x07, FixnumFlag = 0x01, FlonumMask = 0x03, FlonumFlag = 0x02, SymbolFlag = 0x0c, } #[derive(Debug, PartialEq)] #[link_name = "ruby_value_type"] #[repr(C)] pub enum ValueType { None = 0x00, Object = 0x01, Class = 0x02, Module = 0x03, Float = 0x04, RString = 0x05, Regexp = 0x06, Array = 0x07, Hash = 0x08, Struct = 0x09, Bignum = 0x0a, File = 0x0b, Data = 0x0c, Match = 0x0d, Complex = 0x0e, Rational = 0x0f, Nil = 0x11, True = 0x12, False = 0x13, Symbol = 0x14, Fixnum = 0x15, Undef = 0x16, IMemo = 0x1a, Node = 0x1b, IClass = 0x1c, Zombie = 0x1d, Mask = 0x1f, } #[repr(C)] #[derive(Copy, Clone, Debug, PartialEq)] pub struct Value { pub value: InternalValue, } impl Value { pub fn is_true(&self) -> bool { self.value == (RubySpecialConsts::True as InternalValue) } pub fn is_false(&self) -> bool { self.value == (RubySpecialConsts::False as InternalValue) } pub fn is_nil(&self) -> bool { self.value == (RubySpecialConsts::Nil as InternalValue) } pub fn is_node(&self) -> bool { self.builtin_type() == ValueType::Node } pub fn is_undef(&self) -> bool { self.value == (RubySpecialConsts::Undef as InternalValue) } pub fn is_symbol(&self) -> bool { (self.value & !((!0) << SPECIAL_SHIFT)) == (RubySpecialFlags::SymbolFlag as InternalValue) } pub fn is_fixnum(&self) -> bool { (self.value & (RubySpecialFlags::FixnumFlag as InternalValue)) != 0 } pub fn is_flonum(&self) -> bool { (self.value & (RubySpecialFlags::FlonumMask as InternalValue)) == (RubySpecialFlags::FlonumFlag as InternalValue) } pub fn is_frozen(&self) -> bool { !self.is_fl_able() || self.is_obj_frozen_raw() } pub fn ty(&self) -> ValueType { if self.is_immediate() { if self.is_fixnum() { ValueType::Fixnum } else if self.is_flonum() { ValueType::Float } else if self.is_true() { ValueType::True } else if self.is_symbol() { ValueType::Symbol } else if self.is_undef() { ValueType::Undef } else { self.builtin_type() } } else if !self.is_test() { if self.is_nil() { ValueType::Nil } else if self.is_false() { ValueType::False } else { self.builtin_type() } } else { self.builtin_type() } } fn is_fl_able(&self) -> bool { !self.is_special_const() && !self.is_node() } fn is_special_const(&self) -> bool { self.is_immediate() || !self.is_test() } fn is_immediate(&self) -> bool { (self.value & (RubySpecialFlags::ImmediateMask as InternalValue)) != 0 } fn is_test(&self) -> bool { (self.value & !(RubySpecialConsts::Nil as InternalValue)) != 0 } fn is_obj_frozen_raw(&self) -> bool { unsafe { let basic: *const RBasic = mem::transmute(self.value); (*basic).flags & (constant::FL_FREEZE as InternalValue) != 0 } } fn builtin_type(&self) -> ValueType { unsafe { let basic: *const RBasic = mem::transmute(self.value); let masked = (*basic).flags & (ValueType::Mask as InternalValue); mem::transmute(masked as u32) } } } impl From<InternalValue> for Value { fn from(internal_value: InternalValue) -> Self { Value { value: internal_value } } }