1 #!/usr/bin/env python 2 3 """ 4 Integer objects. 5 6 Copyright (C) 2015, 2016, 2017, 2018, 2021 Paul Boddie <paul@boddie.org.uk> 7 8 This program is free software; you can redistribute it and/or modify it under 9 the terms of the GNU General Public License as published by the Free Software 10 Foundation; either version 3 of the License, or (at your option) any later 11 version. 12 13 This program is distributed in the hope that it will be useful, but WITHOUT 14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS 15 FOR A PARTICULAR PURPOSE. See the GNU General Public License for more 16 details. 17 18 You should have received a copy of the GNU General Public License along with 19 this program. If not, see <http://www.gnu.org/licenses/>. 20 """ 21 22 from __builtins__.str import basestring 23 from __builtins__.unicode import utf8string 24 from native import get_maxint, get_minint, is_int, \ 25 int_add, int_and, int_div, int_eq, int_ge, int_gt, \ 26 int_lshift, int_le, int_lt, int_mod, int_mul, int_ne, \ 27 int_neg, int_not, int_or, int_pow, int_rshift, int_str, \ 28 int_sub, int_xor 29 30 def new_int(number_or_string, base=10): 31 32 "Initialise the integer with the given 'number_or_string'." 33 34 if is_int(number_or_string): 35 return number_or_string 36 elif isinstance(number_or_string, basestring): 37 return str_to_int(number_or_string, base) 38 else: 39 raise TypeError 40 41 def str_to_int(value, base=10): 42 43 "Decode the string 'value' using the given 'base'." 44 45 # NOTE: Add support for lower and upper in the string classes. 46 47 #value = value.lower() 48 len_value = len(value) 49 digits = "0123456789abcdefghijklmnopqrstuvwxyz" 50 51 result = 0 52 i = 0 53 54 while i < len_value: 55 c = value[i] 56 d = digits.index(c) 57 result = result * base + d 58 i += 1 59 60 return result 61 62 class int: 63 64 "An integer abstraction." 65 66 def __init__(self, number_or_string=None, base=10): 67 68 "Initialise the integer with the given 'number_or_string'." 69 70 # Implemented by new_int above, invoked specially by the translator. 71 72 pass 73 74 def __hash__(self): 75 76 "Return a value for hashing purposes." 77 78 return self 79 80 def _binary_op(self, op, other): 81 82 "Perform 'op' on this int and 'other' if appropriate." 83 84 if is_int(other): 85 return op(self, other) 86 else: 87 return NotImplemented 88 89 def _binary_op_rev(self, op, other): 90 91 "Perform 'op' on 'other' and this int if appropriate." 92 93 if is_int(other): 94 return op(other, self) 95 else: 96 return NotImplemented 97 98 def __iadd__(self, other): 99 100 "Return a new int for the addition of this int and 'other'." 101 102 return self._binary_op(int_add, other) 103 104 def __isub__(self, other): 105 106 "Return a new int for the subtraction of this int and 'other'." 107 108 return self._binary_op(int_sub, other) 109 110 def __imul__(self, other): 111 112 "Return a new int for the multiplication of this int and 'other'." 113 114 return self._binary_op(int_mul, other) 115 116 def __idiv__(self, other): 117 118 "Return a new int for the division of this int and 'other'." 119 120 return self._binary_op(int_div, other) 121 122 def __imod__(self, other): 123 124 "Return a new int for the modulo of this int by 'other'." 125 126 return self._binary_op(int_mod, other) 127 128 def __ipow__(self, other): 129 130 "Return a new int for the exponentiation of this int by 'other'." 131 132 return self._binary_op(int_pow, other) 133 134 def __iand__(self, other): 135 136 "Return a new int for the binary-and of this int and 'other'." 137 138 return self._binary_op(int_and, other) 139 140 def __ior__(self, other): 141 142 "Return a new int for the binary-or of this int and 'other'." 143 144 return self._binary_op(int_or, other) 145 146 def __ixor__(self, other): 147 148 "Return a new int for the exclusive-or of this int and 'other'." 149 150 return self._binary_op(int_xor, other) 151 152 def __invert__(self): 153 154 "Return the inversion of this int." 155 156 return int_not(self) 157 158 __add__ = __radd__ = __iadd__ 159 __sub__ = __isub__ 160 161 def __rsub__(self, other): 162 163 "Return a new int for the subtraction of this int from 'other'." 164 165 return self._binary_op_rev(int_sub, other) 166 167 __mul__ = __rmul__ = __imul__ 168 __div__ = __idiv__ 169 170 def __rdiv__(self, other): 171 172 "Return a new int for the division of this int into 'other'." 173 174 return self._binary_op_rev(int_div, other) 175 176 # NOTE: To be implemented. 177 178 def __floordiv__(self, other): pass 179 def __rfloordiv__(self, other): pass 180 def __ifloordiv__(self, other): pass 181 182 __mod__ = __imod__ 183 184 def __rmod__(self, other): 185 186 "Return a new int for the modulo of 'other' by this int." 187 188 return self._binary_op_rev(int_mod, other) 189 190 __pow__ = __ipow__ 191 192 def __rpow__(self, other): 193 194 "Return a new int for the exponentiation of 'other' by this int." 195 196 return self._binary_op_rev(int_pow, other) 197 198 __and__ = __rand__ = __iand__ 199 __or__ = __ror__ = __ior__ 200 __xor__ = __rxor__ = __ixor__ 201 202 def __lshift__(self, other): 203 204 "Return a new int left-shifted by 'other'." 205 206 return self._binary_op(int_lshift, other) 207 208 def __rlshift__(self, other): 209 210 "Return a new int left-shifted by 'other'." 211 212 return self._binary_op_rev(int_lshift, other) 213 214 def __rshift__(self, other): 215 216 "Return a new int right-shifted by 'other'." 217 218 return self._binary_op(int_rshift, other) 219 220 def __rrshift__(self, other): 221 222 "Return a new int right-shifted by 'other'." 223 224 return self._binary_op_rev(int_rshift, other) 225 226 __ilshift__ = __lshift__ 227 __irshift__ = __rshift__ 228 229 def __lt__(self, other): 230 231 "Return whether this int is less than 'other'." 232 233 return self._binary_op(int_lt, other) 234 235 def __gt__(self, other): 236 237 "Return whether this int is greater than 'other'." 238 239 return self._binary_op(int_gt, other) 240 241 def __le__(self, other): 242 243 "Return whether this int is less than or equal to 'other'." 244 245 return self._binary_op(int_le, other) 246 247 def __ge__(self, other): 248 249 "Return whether this int is greater than or equal to 'other'." 250 251 return self._binary_op(int_ge, other) 252 253 def __eq__(self, other): 254 255 "Return whether this int is equal to 'other'." 256 257 return self._binary_op(int_eq, other) 258 259 def __ne__(self, other): 260 261 "Return whether this int is not equal to 'other'." 262 263 return self._binary_op(int_ne, other) 264 265 def __neg__(self): 266 267 "Apply the unary negation operator." 268 269 return int_neg(self) 270 271 def __pos__(self): 272 273 "Apply the unary positive operator." 274 275 return self 276 277 def __str__(self): 278 279 "Return a string representation." 280 281 return utf8string(int_str(self)) 282 283 __repr__ = __str__ 284 285 def __bool__(self): 286 287 "Return whether this int is non-zero." 288 289 return int_ne(self, 0) 290 291 # Limits. 292 293 maxint = get_maxint() 294 minint = get_minint() 295 296 # vim: tabstop=4 expandtab shiftwidth=4
