def execute(self, frame):
# 先从操作数栈中弹出一个int变量
index = frame.operand_stack.pop_numeric()
# 然后看它是否在low和high给定的范围内
if self.low <= index <= self.high:
# 如果在，则从jump_offset表中查出偏移量进行跳转
offset = self.jump_offsets[index - self.low]
else:
# 否则按照default_offset跳转
offset = self.default_offset
branch(frame, offset)
def execute(self, frame):
# 先从操作数栈中弹出一个int变量
key = frame.operand_stack.pop_numeric()
# 然后用它查找match_offsets，看能否找到匹配的key
for i in range(0, self.n_pairs * 2, 2):
if self.match_offsets[i] == key:
# 如果能，则按照value给出的偏移量跳转
offset = self.match_offsets[i + 1]
branch(frame, ctypes.c_int(offset).value)
return
# 否则按照default_offset跳转
branch(frame, ctypes.c_int(self.default_offset).value)
def execute(self, frame):
val1, val2 = _acmpPop(frame)
if val1 is not val2:
branch(frame, self.offset)
def execute(self, frame):
branch(frame, self.offset)
def execute(self, frame):
val = frame.operand_stack.pop_numeric()
if val >= 0:
branch(frame, self.offset)
def execute(self, frame):
val1, val2 = _icmpPop(frame)
if val1 >= val2:
branch(frame, self.offset)