Lib/curses/ascii.py

   1 """Constants and membership tests for ASCII characters"""
   2
   3 NUL     = 0x00  # ^@
   4 SOH     = 0x01  # ^A
   5 STX     = 0x02  # ^B
   6 ETX     = 0x03  # ^C
   7 EOT     = 0x04  # ^D
   8 ENQ     = 0x05  # ^E
   9 ACK     = 0x06  # ^F
  10 BEL     = 0x07  # ^G
  11 BS      = 0x08  # ^H
  12 TAB     = 0x09  # ^I
  13 HT      = 0x09  # ^I
  14 LF      = 0x0a  # ^J
  15 NL      = 0x0a  # ^J
  16 VT      = 0x0b  # ^K
  17 FF      = 0x0c  # ^L
  18 CR      = 0x0d  # ^M
  19 SO      = 0x0e  # ^N
  20 SI      = 0x0f  # ^O
  21 DLE     = 0x10  # ^P
  22 DC1     = 0x11  # ^Q
  23 DC2     = 0x12  # ^R
  24 DC3     = 0x13  # ^S
  25 DC4     = 0x14  # ^T
  26 NAK     = 0x15  # ^U
  27 SYN     = 0x16  # ^V
  28 ETB     = 0x17  # ^W
  29 CAN     = 0x18  # ^X
  30 EM      = 0x19  # ^Y
  31 SUB     = 0x1a  # ^Z
  32 ESC     = 0x1b  # ^[
  33 FS      = 0x1c  # ^\
  34 GS      = 0x1d  # ^]
  35 RS      = 0x1e  # ^^
  36 US      = 0x1f  # ^_
  37 SP      = 0x20  # space
  38 DEL     = 0x7f  # delete
  39
  40 controlnames = [
  41 "NUL", "SOH", "STX", "ETX", "EOT", "ENQ", "ACK", "BEL",
  42 "BS",  "HT",  "LF",  "VT",  "FF",  "CR",  "SO",  "SI",
  43 "DLE", "DC1", "DC2", "DC3", "DC4", "NAK", "SYN", "ETB",
  44 "CAN", "EM",  "SUB", "ESC", "FS",  "GS",  "RS",  "US",
  45 "SP"
  46 ]
  47
  48 def _ctoi(c):
  49     if type(c) == type(""):
  50         return ord(c)
  51     else:
  52         return c
  53
  54 def isalnum(c): return isalpha(c) or isdigit(c)
  55 def isalpha(c): return isupper(c) or islower(c)
  56 def isascii(c): return _ctoi(c) <= 127          # ?
  57 def isblank(c): return _ctoi(c) in (8,32)
  58 def iscntrl(c): return _ctoi(c) <= 31
  59 def isdigit(c): return _ctoi(c) >= 48 and _ctoi(c) <= 57
  60 def isgraph(c): return _ctoi(c) >= 33 and _ctoi(c) <= 126
  61 def islower(c): return _ctoi(c) >= 97 and _ctoi(c) <= 122
  62 def isprint(c): return _ctoi(c) >= 32 and _ctoi(c) <= 126
  63 def ispunct(c): return _ctoi(c) != 32 and not isalnum(c)
  64 def isspace(c): return _ctoi(c) in (9, 10, 11, 12, 13, 32)
  65 def isupper(c): return _ctoi(c) >= 65 and _ctoi(c) <= 90
  66 def isxdigit(c): return isdigit(c) or \
  67     (_ctoi(c) >= 65 and _ctoi(c) <= 70) or (_ctoi(c) >= 97 and _ctoi(c) <= 102)
  68 def isctrl(c): return _ctoi(c) < 32
  69 def ismeta(c): return _ctoi(c) > 127
  70
  71 def ascii(c):
  72     if type(c) == type(""):
  73         return chr(_ctoi(c) & 0x7f)
  74     else:
  75         return _ctoi(c) & 0x7f
  76
  77 def ctrl(c):
  78     if type(c) == type(""):
  79         return chr(_ctoi(c) & 0x1f)
  80     else:
  81         return _ctoi(c) & 0x1f
  82
  83 def alt(c):
  84     if type(c) == type(""):
  85         return chr(_ctoi(c) | 0x80)
  86     else:
  87         return _ctoi(c) | 0x80
  88
  89 def unctrl(c):
  90     bits = _ctoi(c)
  91     if bits == 0x7f:
  92         rep = "^?"
  93     elif bits & 0x20:
  94         rep = chr((bits & 0x7f) | 0x20)
  95     else:
  96         rep = "^" + chr(((bits & 0x7f) | 0x20) + 0x20)
  97     if bits & 0x80:
  98         return "!" + rep
  99     return rep
 100