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