"""fontTools.misc.textTools.py -- miscelaneous routines."""
import string
def safeEval(data, eval=eval):
"""A safe replacement for eval."""
return eval(data, {"__builtins__":{}}, {})
def readHex(content):
"""Convert a list of hex strings to binary data."""
return deHexStr(''.join([ chunk for chunk in content if isinstance(chunk,str) ]))
def deHexStr(hexdata):
"""Convert a hex string to binary data."""
parts = string.split(hexdata)
hexdata = string.join(parts, "")
if len(hexdata) % 2:
hexdata = hexdata + "0"
data = []
for i in range(0, len(hexdata), 2):
data.append(chr(string.atoi(hexdata[i:i+2], 16)))
return "".join(data)
def hexStr(data):
"""Convert binary data to a hex string."""
h = string.hexdigits
r = ''
for c in data:
i = ord(c)
r = r + h[(i >> 4) & 0xF] + h[i & 0xF]
return r
def num2binary(l, bits=32):
all = []
bin = ""
for i in range(bits):
if l & 0x1:
bin = "1" + bin
else:
bin = "0" + bin
l = l >> 1
if not ((i+1) % 8):
all.append(bin)
bin = ""
if bin:
all.append(bin)
all.reverse()
assert l in (0, -1), "number doesn't fit in number of bits"
return string.join(all, " ")
def binary2num(bin):
bin = string.join(string.split(bin), "")
l = 0
for digit in bin:
l = l << 1
if digit <> "0":
l = l | 0x1
return l
def caselessSort(alist):
"""Return a sorted copy of a list. If there are only strings
in the list, it will not consider case.
"""
try:
# turn ['FOO', 'aaBc', 'ABcD'] into
# [('foo', 'FOO'), ('aabc', 'aaBc'), ('abcd', 'ABcD')],
# but only if all elements are strings
tupledlist = map(lambda item, lower = string.lower:
(lower(item), item), alist)
except TypeError:
# at least one element in alist is not a string, proceed the normal way...
alist = alist[:]
alist.sort()
return alist
else:
tupledlist.sort()
# turn [('aabc', 'aaBc'), ('abcd', 'ABcD'), ('foo', 'FOO')] into
# ['aaBc', 'ABcD', 'FOO']
return map(lambda x: x[1], tupledlist)
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