Initial commit

pjvm/jtypes/jprimitives.py

@@ -0,0 +1,70 @@
+import struct
+from typing import Union
+
+from .jtype import JType
+
+
+class JPrimitive(JType):
+    def __init__(self, value):
+        self.j_type = self.j_base_type
+        super(JPrimitive, self).__init__(value)
+
+
+class JChar(JPrimitive):
+    j_base_type = 'C'  # todo 16-bit unicode code point
+
+
+class JDouble(JPrimitive):
+    j_base_type = 'D'
+
+
+class JFloat(JPrimitive):
+    j_base_type = 'F'
+
+
+class JBool(JPrimitive):
+    j_base_type = 'Z'
+
+    def __init__(self, value):
+        self.value = value
+        super(JBool, self).__init__(value)
+
+
+# Integer types
+
+class JPrimitiveInteger(JPrimitive):
+    pj_mask: int
+    pj_struct: str
+
+    def __init__(self, value: Union[JType, bytes, int]):
+        if isinstance(value, int):
+            self.value = value & self.pj_mask
+        elif isinstance(value, bytes):
+            self.value, = struct.unpack(self.pj_struct, value)
+        else:
+            raise NotImplementedError()
+        super(JPrimitiveInteger, self).__init__(value)
+
+
+class JByte(JPrimitiveInteger):
+    j_base_type = 'B'
+    pj_mask = 0xff
+    pj_struct = 'b'
+
+
+class JShort(JPrimitiveInteger):
+    j_base_type = 'S'
+    pj_mask = 0xffff
+    pj_struct = 'h'
+
+
+class JInt(JPrimitiveInteger):
+    j_base_type = 'I'
+    pj_mask = 0xffffffff
+    pj_struct = 'i'
+
+
+class JLong(JPrimitiveInteger):
+    j_base_type = 'J'
+    pj_mask = 0xffffffffffffffff
+    pj_struct = 'q'