Merge pull request #7 from serpilliere/bin_stream_ida

Merge "Bin stream IDA" refactoring

1 files changed, 41 insertions, 0 deletions

diff --git a/miasm2/core/bin_stream_ida.py b/miasm2/core/bin_stream_ida.py
new file mode 100644
index 00000000..ff88f03e
--- /dev/null
+++ b/miasm2/core/bin_stream_ida.py
@@ -0,0 +1,41 @@
+from idc import Byte
+
+from miasm2.core.bin_stream import bin_stream_str
+
+
+class bin_stream_ida(bin_stream_str):
+    """
+    bin_stream implementation for IDA
+
+    IDA should provide Byte function
+
+    Don't generate xrange using address computation:
+    It can raise error on overflow 7FFFFFFF with 32 bit python
+    """
+    def getbytes(self, start, l=1):
+        o = ""
+        for ad in xrange(l):
+            o += chr(Byte(ad + start - self.shift))
+        return o
+
+    def readbs(self, l=1):
+        if self.offset + l > self.l:
+            raise IOError
+        o = self.getbytes(self.offset)
+        self.offset += l
+        return p
+
+    def writebs(self, l=1):
+        raise ValueError('writebs unsupported')
+
+    def __str__(self):
+        raise NotImplementedError('Not fully functional')
+
+    def setoffset(self, val):
+        self.offset = val
+
+    def __len__(self):
+        return 0x7FFFFFFF
+
+    def getlen(self):
+        return 0x7FFFFFFF - self.offset - self.shift