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71 lines
2.2 KiB
Plaintext
71 lines
2.2 KiB
Plaintext
NAME
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hash - return the calc hash value
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SYNOPSIS
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hash(x_1 [, x_2, x_3, ...])
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TYPES
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x_1, x_1, ... any
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return integer v, 0 <= v < 2^32
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DESCRIPTION
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Returns a hash value for one or more values of arbitrary types.
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The calc hash value is based on the core Fowler/Noll/Vo hash
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known as FNV-0. The return value, however, cannot be used
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as an FNV hash value because calc's internal function also
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takes into account more abstract concepts such as data types.
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WARNING: Use of FNV-0 is NOT recommended for general purposes.
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Calc uses FNV-0 for internal objects such as associative
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arrays as well as other internal processes. Calc
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maintains the use of FNV-0 for backwards compatibility.
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You should use the FNV-1a hash instead!!!!!
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Use the fnv() builtin function for general quick, non-cryptographic
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hash purposes.
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See also:
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http://www.isthe.com/chongo/tech/comp/fnv/
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information about the Fowler/Noll/Vo (FNV) hash.
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EXAMPLE
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; a = isqrt(2e1000); s = "xyz";
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; hash(a,s)
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2378490456
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LIMITS
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The number of arguments is not to exceed 1024.
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LINK LIBRARY
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none
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SEE ALSO
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ishash, fnv, sha1
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## Copyright (C) 2023 Landon Curt Noll
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##
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## Calc is open software; you can redistribute it and/or modify it under
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## the terms of the version 2.1 of the GNU Lesser General Public License
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## as published by the Free Software Foundation.
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##
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## Calc is distributed in the hope that it will be useful, but WITHOUT
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## ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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## or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
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## Public License for more details.
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##
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## A copy of version 2.1 of the GNU Lesser General Public License is
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## distributed with calc under the filename COPYING-LGPL. You should have
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## received a copy with calc; if not, write to Free Software Foundation, Inc.
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## 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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##
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## Under source code control: 2023/09/24 11:12:16
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## File existed as early as: 2023
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##
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## chongo <was here> /\oo/\ http://www.isthe.com/chongo/
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## Share and enjoy! :-) http://www.isthe.com/chongo/tech/comp/calc/
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