Source Code for Package envi.memcanvas.renderers

 1   
 2  """ 
 3  Some of the basic/universal memory renderers. 
 4  """ 
 5   
 6  import struct 
 7   
 8  import envi.memcanvas as e_canvas 
 9   
10 -class ByteRend(e_canvas.MemoryRenderer): 
11   
12      __fmt_char__ = "B" 
13   
14 -    def __init__(self, bigend=False): 
15   
16          self.fmtbase = "<" 
17          if bigend: 
18              self.fmtbase = ">" 
19   
20          self.width = struct.calcsize("%s%s" % (self.fmtbase,self.__class__.__fmt_char__)) 
21          self.dispfmt = "%%.%dx" % (self.width*2) 
22          cnt = 16 / self.width 
23          self.packfmt = self.fmtbase + (self.__class__.__fmt_char__ * cnt) 
24   
25 -    def render(self, mcanv, va): 
26          bytes = mcanv.mem.readMemory(va, 16) 
27          self.rendVa(mcanv, va) 
28          mcanv.addText("  ") 
29   
30          for val in mcanv.mem.readMemoryFormat(va, self.packfmt): 
31              bstr = self.dispfmt % val 
32              if mcanv.mem.isValidPointer(val): 
33                  mcanv.addVaText(bstr, val) 
34              else: 
35                  mcanv.addNameText(bstr) 
36   
37              mcanv.addText(" ") 
38   
39          mcanv.addText("  ") 
40          self.rendChars(mcanv, bytes) 
41          mcanv.addText("\n") 
42          return 16 
43   
44 -class ShortRend(ByteRend): 
45   
46      __fmt_char__ = "H" 
47   
48 -class LongRend(ByteRend): 
49   
50      __fmt_char__ = "L" 
51   
52 -class QuadRend(ByteRend): 
53      __fmt_char__ = "Q" 
54