| 1 | """Constants and membership tests for ASCII characters"""
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| 2 |
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| 3 | NUL = 0x00 # ^@
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| 4 | SOH = 0x01 # ^A
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| 5 | STX = 0x02 # ^B
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| 6 | ETX = 0x03 # ^C
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| 7 | EOT = 0x04 # ^D
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| 8 | ENQ = 0x05 # ^E
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| 9 | ACK = 0x06 # ^F
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| 10 | BEL = 0x07 # ^G
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| 11 | BS = 0x08 # ^H
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| 12 | TAB = 0x09 # ^I
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| 13 | HT = 0x09 # ^I
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| 14 | LF = 0x0a # ^J
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| 15 | NL = 0x0a # ^J
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| 16 | VT = 0x0b # ^K
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| 17 | FF = 0x0c # ^L
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| 18 | CR = 0x0d # ^M
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| 19 | SO = 0x0e # ^N
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| 20 | SI = 0x0f # ^O
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| 21 | DLE = 0x10 # ^P
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| 22 | DC1 = 0x11 # ^Q
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| 23 | DC2 = 0x12 # ^R
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| 24 | DC3 = 0x13 # ^S
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| 25 | DC4 = 0x14 # ^T
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| 26 | NAK = 0x15 # ^U
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| 27 | SYN = 0x16 # ^V
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| 28 | ETB = 0x17 # ^W
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| 29 | CAN = 0x18 # ^X
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| 30 | EM = 0x19 # ^Y
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| 31 | SUB = 0x1a # ^Z
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| 32 | ESC = 0x1b # ^[
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| 33 | FS = 0x1c # ^\
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| 34 | GS = 0x1d # ^]
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| 35 | RS = 0x1e # ^^
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| 36 | US = 0x1f # ^_
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| 37 | SP = 0x20 # space
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| 38 | DEL = 0x7f # delete
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| 39 |
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| 40 | controlnames = [
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| 41 | "NUL", "SOH", "STX", "ETX", "EOT", "ENQ", "ACK", "BEL",
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| 42 | "BS", "HT", "LF", "VT", "FF", "CR", "SO", "SI",
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| 43 | "DLE", "DC1", "DC2", "DC3", "DC4", "NAK", "SYN", "ETB",
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| 44 | "CAN", "EM", "SUB", "ESC", "FS", "GS", "RS", "US",
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| 45 | "SP"
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| 46 | ]
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| 47 |
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| 48 | def _ctoi(c):
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| 49 | if type(c) == type(""):
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| 50 | return ord(c)
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| 51 | else:
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| 52 | return c
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| 53 |
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| 54 | def isalnum(c): return isalpha(c) or isdigit(c)
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| 55 | def isalpha(c): return isupper(c) or islower(c)
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| 56 | def isascii(c): return _ctoi(c) <= 127 # ?
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| 57 | def isblank(c): return _ctoi(c) in (8,32)
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| 58 | def iscntrl(c): return _ctoi(c) <= 31
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| 59 | def isdigit(c): return _ctoi(c) >= 48 and _ctoi(c) <= 57
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| 60 | def isgraph(c): return _ctoi(c) >= 33 and _ctoi(c) <= 126
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| 61 | def islower(c): return _ctoi(c) >= 97 and _ctoi(c) <= 122
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| 62 | def isprint(c): return _ctoi(c) >= 32 and _ctoi(c) <= 126
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| 63 | def ispunct(c): return _ctoi(c) != 32 and not isalnum(c)
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| 64 | def isspace(c): return _ctoi(c) in (9, 10, 11, 12, 13, 32)
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| 65 | def isupper(c): return _ctoi(c) >= 65 and _ctoi(c) <= 90
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| 66 | def isxdigit(c): return isdigit(c) or \
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| 67 | (_ctoi(c) >= 65 and _ctoi(c) <= 70) or (_ctoi(c) >= 97 and _ctoi(c) <= 102)
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| 68 | def isctrl(c): return _ctoi(c) < 32
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| 69 | def ismeta(c): return _ctoi(c) > 127
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| 70 |
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| 71 | def ascii(c):
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| 72 | if type(c) == type(""):
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| 73 | return chr(_ctoi(c) & 0x7f)
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| 74 | else:
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| 75 | return _ctoi(c) & 0x7f
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| 76 |
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| 77 | def ctrl(c):
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| 78 | if type(c) == type(""):
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| 79 | return chr(_ctoi(c) & 0x1f)
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| 80 | else:
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| 81 | return _ctoi(c) & 0x1f
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| 82 |
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| 83 | def alt(c):
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| 84 | if type(c) == type(""):
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| 85 | return chr(_ctoi(c) | 0x80)
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| 86 | else:
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| 87 | return _ctoi(c) | 0x80
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| 88 |
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| 89 | def unctrl(c):
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| 90 | bits = _ctoi(c)
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| 91 | if bits == 0x7f:
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| 92 | rep = "^?"
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| 93 | elif isprint(bits & 0x7f):
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| 94 | rep = chr(bits & 0x7f)
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| 95 | else:
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| 96 | rep = "^" + chr(((bits & 0x7f) | 0x20) + 0x20)
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| 97 | if bits & 0x80:
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| 98 | return "!" + rep
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| 99 | return rep
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