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ascii.py
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"""Constants and membership tests for ASCII characters""" NUL = 0x00 # ^@ SOH = 0x01 # ^A STX = 0x02 # ^B ETX = 0x03 # ^C EOT = 0x04 # ^D ENQ = 0x05 # ^E ACK = 0x06 # ^F BEL = 0x07 # ^G BS = 0x08 # ^H TAB = 0x09 # ^I HT = 0x09 # ^I LF = 0x0a # ^J NL = 0x0a # ^J VT = 0x0b # ^K FF = 0x0c # ^L CR = 0x0d # ^M SO = 0x0e # ^N SI = 0x0f # ^O DLE = 0x10 # ^P DC1 = 0x11 # ^Q DC2 = 0x12 # ^R DC3 = 0x13 # ^S DC4 = 0x14 # ^T NAK = 0x15 # ^U SYN = 0x16 # ^V ETB = 0x17 # ^W CAN = 0x18 # ^X EM = 0x19 # ^Y SUB = 0x1a # ^Z ESC = 0x1b # ^[ FS = 0x1c # ^\ GS = 0x1d # ^] RS = 0x1e # ^^ US = 0x1f # ^_ SP = 0x20 # space DEL = 0x7f # delete controlnames = [ "NUL", "SOH", "STX", "ETX", "EOT", "ENQ", "ACK", "BEL", "BS", "HT", "LF", "VT", "FF", "CR", "SO", "SI", "DLE", "DC1", "DC2", "DC3", "DC4", "NAK", "SYN", "ETB", "CAN", "EM", "SUB", "ESC", "FS", "GS", "RS", "US", "SP" ] def _ctoi(c): if type(c) == type(""): return ord(c) else: return c def isalnum(c): return isalpha(c) or isdigit(c) def isalpha(c): return isupper(c) or islower(c) def isascii(c): return 0 <= _ctoi(c) <= 127 # ? def isblank(c): return _ctoi(c) in (9, 32) def iscntrl(c): return 0 <= _ctoi(c) <= 31 or _ctoi(c) == 127 def isdigit(c): return 48 <= _ctoi(c) <= 57 def isgraph(c): return 33 <= _ctoi(c) <= 126 def islower(c): return 97 <= _ctoi(c) <= 122 def isprint(c): return 32 <= _ctoi(c) <= 126 def ispunct(c): return isgraph(c) and not isalnum(c) def isspace(c): return _ctoi(c) in (9, 10, 11, 12, 13, 32) def isupper(c): return 65 <= _ctoi(c) <= 90 def isxdigit(c): return isdigit(c) or \ (65 <= _ctoi(c) <= 70) or (97 <= _ctoi(c) <= 102) def isctrl(c): return 0 <= _ctoi(c) < 32 def ismeta(c): return _ctoi(c) > 127 def ascii(c): if type(c) == type(""): return chr(_ctoi(c) & 0x7f) else: return _ctoi(c) & 0x7f def ctrl(c): if type(c) == type(""): return chr(_ctoi(c) & 0x1f) else: return _ctoi(c) & 0x1f def alt(c): if type(c) == type(""): return chr(_ctoi(c) | 0x80) else: return _ctoi(c) | 0x80 def unctrl(c): bits = _ctoi(c) if bits == 0x7f: rep = "^?" elif isprint(bits & 0x7f): rep = chr(bits & 0x7f) else: rep = "^" + chr(((bits & 0x7f) | 0x20) + 0x20) if bits & 0x80: return "!" + rep return rep