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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
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