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[swfinterp] Implement String basics

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This commit is contained in:
Philipp Hagemeister 2014-11-17 04:25:04 +01:00
parent e983cf5277
commit 3cbcff8a2d
3 changed files with 41 additions and 2 deletions
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11
test/swftests/StringBasics.as Normal file
View file

@ -0,0 +1,11 @@
// input: []
// output: 3
package {
public class StringBasics {
public static function main():int{
var s:String = "abc";
return s.length;
}
}
}

11
test/swftests/StringConversion.as Normal file
View file

@ -0,0 +1,11 @@
// input: []
// output: 2
package {
public class StringConversion {
public static function main():int{
var s:String = String(99);
return s.length;
}
}
}

21
youtube_dl/swfinterp.py
View file

@ -148,6 +148,9 @@ def _read_byte(reader):
return res
StringClass = _AVMClass('(no name idx)', 'String')
class SWFInterpreter(object):
def __init__(self, file_contents):
self._patched_functions = {}
@ -483,6 +486,17 @@ class SWFInterpreter(object):
res = args[0].join(obj)
stack.append(res)
continue
elif obj == StringClass:
if mname == 'String':
assert len(args) == 1
assert isinstance(args[0], (int, compat_str))
res = compat_str(args[0])
stack.append(res)
continue
else:
raise NotImplementedError(
'Function String.%s is not yet implemented'
% mname)
raise NotImplementedError(
'Unsupported property %r on %r'
% (mname, obj))
@ -532,7 +546,10 @@ class SWFInterpreter(object):
break
else:
res = scopes[0]
stack.append(res[mname])
if mname not in res and mname == 'String':
stack.append(StringClass)
else:
stack.append(res[mname])
elif opcode == 94: # findproperty
index = u30()
mname = self.multinames[index]
@ -576,7 +593,7 @@ class SWFInterpreter(object):
pname = self.multinames[index]
if pname == 'length':
obj = stack.pop()
assert isinstance(obj, list)
assert isinstance(obj, (compat_str, list))
stack.append(len(obj))
elif isinstance(pname, compat_str): # Member access
obj = stack.pop()