| from .py3compat import byte2int, int2byte, bytes2str |
| |
| |
| # Map an integer in the inclusive range 0-255 to its string byte representation |
| _printable = dict((i, ".") for i in range(256)) |
| _printable.update((i, bytes2str(int2byte(i))) for i in range(32, 128)) |
| |
| |
| def hexdump(data, linesize): |
| """ |
| data is a bytes object. The returned result is a string. |
| """ |
| prettylines = [] |
| if len(data) < 65536: |
| fmt = "%%04X %%-%ds %%s" |
| else: |
| fmt = "%%08X %%-%ds %%s" |
| fmt = fmt % (3 * linesize - 1,) |
| for i in range(0, len(data), linesize): |
| line = data[i : i + linesize] |
| hextext = " ".join('%02x' % byte2int(b) for b in line) |
| rawtext = "".join(_printable[byte2int(b)] for b in line) |
| prettylines.append(fmt % (i, str(hextext), str(rawtext))) |
| return prettylines |
| |
| |
| class HexString(bytes): |
| """ |
| Represents bytes that will be hex-dumped to a string when its string |
| representation is requested. |
| """ |
| def __init__(self, data, linesize = 16): |
| self.linesize = linesize |
| |
| def __new__(cls, data, *args, **kwargs): |
| return bytes.__new__(cls, data) |
| |
| def __str__(self): |
| if not self: |
| return "''" |
| sep = "\n" |
| return sep + sep.join( |
| hexdump(self, self.linesize)) |
| |
