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add header to over.core.misc.hexdump

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This commit is contained in:
Martinez 2015-08-12 18:30:38 +02:00
parent ca1041c39b
commit 01ef34b519
1 changed files with 19 additions and 3 deletions
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22
core/misc.py
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@ -87,11 +87,12 @@ def debugger():
# --------------------------------------------------
def hexdump(data, indent=0, offset=16, show_offsets=True, show_ascii=True, output=sys.stdout):
def hexdump(data, indent=0, offset=16, show_header=True, show_offsets=True, show_ascii=True, output=sys.stdout):
"""
Writes a hex dump of 'data' to 'output'.
The output text is indented with spaces and contains 'offset' bytes per line.
If show_header is True, a single line with byte numbers preceeds all output.
If show_offsets is True, each line is prefixed with the address of the first byte of that line.
If show_ascii is True, each line is suffixed with its ASCII representation. Unprintable characters
are replaced with a dot.
@ -101,9 +102,24 @@ def hexdump(data, indent=0, offset=16, show_offsets=True, show_ascii=True, outpu
if type(data) is not bytes:
raise ValueError('data must be bytes')
format_str = '%%0%dx ' %(math.ceil(math.log2(len(data)) / 8) * 2)
offset_figures = math.ceil(math.log2(len(data)) / 8) * 2
format_str = '%%0%dx ' %(offset_figures)
ptr = 0
if show_header:
line = []
if show_offsets:
line.append('offset'[:offset_figures].ljust(offset_figures + 2))
for i in range(offset):
line.append('%2x' %(i))
if show_ascii:
line.append(' ASCII')
output.write(' '.join(line) + '\n')
while data[ptr:]:
if indent:
output.write(' ' * indent)
@ -129,7 +145,7 @@ def hexdump(data, indent=0, offset=16, show_offsets=True, show_ascii=True, outpu
output.write(' '.join(hex_bytes))
if show_ascii:
output.write(' ' + ''.join(ascii_bytes))
output.write(' |' + ''.join(ascii_bytes) + '|')
output.write('\n')