Add in the audiotools resources

Melodia/resources/audiotools/construct/lib/hex.py

@@ -0,0 +1,36 @@
+_printable = dict((chr(i), ".") for i in range(256))
+_printable.update((chr(i), chr(i)) for i in range(32, 128))
+
+def hexdump(data, linesize = 16):
+    prettylines = []
+    if len(data) < 65536:
+        fmt = "%%04X   %%-%ds   %%s"
+    else:
+        fmt = "%%08X   %%-%ds   %%s"
+    fmt = fmt % (3 * linesize - 1,)
+    for i in xrange(0, len(data), linesize):
+        line = data[i : i + linesize]
+        hextext = " ".join(b.encode("hex") for b in line)
+        rawtext = "".join(_printable[b] for b in line)
+        prettylines.append(fmt % (i, hextext, rawtext))
+    return prettylines
+
+class HexString(str):
+    """
+    represents a string that will be hex-dumped (only via __pretty_str__).
+    this class derives of str, and behaves just like a normal string in all
+    other contexts.
+    """
+    def __init__(self, data, linesize = 16):
+        str.__init__(self, data)
+        self.linesize = linesize
+    def __new__(cls, data, *args, **kwargs):
+        return str.__new__(cls, data)
+    def __pretty_str__(self, nesting = 1, indentation = "    "):
+        if not self:
+            return "''"
+        sep = "\n" + indentation * nesting
+        return sep + sep.join(hexdump(self))
+
+
+