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[swfinterp] Implement charCodeAt

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This commit is contained in:
Philipp Hagemeister 2014-11-17 05:03:46 +01:00
parent 6b592d93a2
commit 33a266f4ba
2 changed files with 36 additions and 1 deletions
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11
test/swftests/StringCharCodeAt.as Normal file
View file

@ -0,0 +1,11 @@
// input: []
// output: 9897
package {
public class StringCharCodeAt {
public static function main():int{
var s:String = "abc";
return s.charCodeAt(1) * 100 + s.charCodeAt();
}
}
}

26
youtube_dl/swfinterp.py
View file

@ -411,7 +411,9 @@ class SWFInterpreter(object):
self._classes_by_name, avm_class.variables]) self._classes_by_name, avm_class.variables])
while True: while True:
opcode = _read_byte(coder) opcode = _read_byte(coder)
if opcode == 16: # jump if opcode == 9: # label
pass # Spec says: "Do nothing."
elif opcode == 16: # jump
offset = s24() offset = s24()
coder.seek(coder.tell() + offset) coder.seek(coder.tell() + offset)
elif opcode == 17: # iftrue elif opcode == 17: # iftrue
@ -436,6 +438,12 @@ class SWFInterpreter(object):
value1 = stack.pop() value1 = stack.pop()
if value2 != value1: if value2 != value1:
coder.seek(coder.tell() + offset) coder.seek(coder.tell() + offset)
elif opcode == 21: # iflt
offset = s24()
value2 = stack.pop()
value1 = stack.pop()
if value1 < value2:
coder.seek(coder.tell() + offset)
elif opcode == 32: # pushnull elif opcode == 32: # pushnull
stack.append(None) stack.append(None)
elif opcode == 33: # pushundefined elif opcode == 33: # pushundefined
@ -516,6 +524,13 @@ class SWFInterpreter(object):
res = obj.split(args[0]) res = obj.split(args[0])
stack.append(res) stack.append(res)
continue continue
elif mname == 'charCodeAt':
assert len(args) <= 1
idx = 0 if len(args) == 0 else args[0]
assert isinstance(idx, int)
res = ord(obj[idx])
stack.append(res)
continue
elif isinstance(obj, list): elif isinstance(obj, list):
if mname == 'slice': if mname == 'slice':
assert len(args) == 1 assert len(args) == 1
@ -687,6 +702,11 @@ class SWFInterpreter(object):
value1 = stack.pop() value1 = stack.pop()
res = value1 - value2 res = value1 - value2
stack.append(res) stack.append(res)
elif opcode == 162: # multiply
value2 = stack.pop()
value1 = stack.pop()
res = value1 * value2
stack.append(res)
elif opcode == 164: # modulo elif opcode == 164: # modulo
value2 = stack.pop() value2 = stack.pop()
value1 = stack.pop() value1 = stack.pop()
@ -702,6 +722,10 @@ class SWFInterpreter(object):
value1 = stack.pop() value1 = stack.pop()
result = value1 >= value2 result = value1 >= value2
stack.append(result) stack.append(result)
elif opcode == 192: # increment_i
value = stack.pop()
assert isinstance(value, int)
stack.append(value + 1)
elif opcode == 208: # getlocal_0 elif opcode == 208: # getlocal_0
stack.append(registers[0]) stack.append(registers[0])
elif opcode == 209: # getlocal_1 elif opcode == 209: # getlocal_1