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59 lines
2.3 KiB
Python
59 lines
2.3 KiB
Python
def itoa(num, base=10):
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"""Convert a decimal number to its equivalent in base 2 or 16; base 10
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is silently passed through. Other bases raise a ValueError. Returns a
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string with hex digits lowercase.
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"""
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fmt = _itoa_fmts.get(base)
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if fmt is None:
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raise ValueError("Unsupported base: %r" % base)
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return fmt.format(num)
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def convert_to_bin(bcd):
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return _bcd2bin[bcd]
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def convert_to_bcd(bin):
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return _bin2bcd[bin]
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_itoa_fmts = {
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2: "{0:b}",
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10: "{0}",
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16: "{0:x}"
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}
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_bcd2bin = (
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0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 10, 11, 12, 13,
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14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 20, 21, 22, 23, 24, 25,
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26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 30, 31, 32, 33, 34, 35, 36, 37,
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38, 39, 40, 41, 42, 43, 44, 45, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49,
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50, 51, 52, 53, 54, 55, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61,
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62, 63, 64, 65, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73,
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74, 75, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85,
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80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 90, 91,
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92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 100, 101,
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102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115,
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110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123,
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124, 125, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131,
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132, 133, 134, 135, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139,
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140, 141, 142, 143, 144, 145, 140, 141, 142, 143, 144, 145, 146, 147,
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148, 149, 150, 151, 152, 153, 154, 155, 150, 151, 152, 153, 154, 155,
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156, 157, 158, 159, 160, 161, 162, 163, 164, 165
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)
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_bin2bcd = (
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0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09,
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0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19,
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0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29,
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0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39,
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0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49,
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0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59,
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0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69,
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0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79,
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0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89,
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0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99
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)
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