/usr/share/gnu-smalltalk/kernel/FloatQ.st is in gnu-smalltalk-common 3.2.5-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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|
| FloatQ Method Definitions
|
|
======================================================================"
"======================================================================
|
| Copyright 2002, 2009 Free Software Foundation, Inc.
| Written by Paolo Bonzini.
|
| This file is part of the GNU Smalltalk class library.
|
| The GNU Smalltalk class library is free software; you can redistribute it
| and/or modify it under the terms of the GNU Lesser General Public License
| as published by the Free Software Foundation; either version 2.1, or (at
| your option) any later version.
|
| The GNU Smalltalk class library is distributed in the hope that it will be
| useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
| General Public License for more details.
|
| You should have received a copy of the GNU Lesser General Public License
| along with the GNU Smalltalk class library; see the file COPYING.LIB.
| If not, write to the Free Software Foundation, 59 Temple Place - Suite
| 330, Boston, MA 02110-1301, USA.
|
======================================================================"
Float subclass: FloatQ [
<shape: #byte>
<category: 'Language-Data types'>
<comment: 'My instances represent floating point numbers that have the same
accuracy as C''s "long double" numbers.'>
FloatQ class >> coerce: aNumber [
"Answer aNumber converted to a FloatQ"
<category: 'converting'>
^aNumber asFloatQ
]
FloatQ class >> signByte [
"Answer the byte of the receiver that contains the sign bit"
<category: 'byte-order dependancies'>
^##(| n k |
n := -2.0q.
1 to: n size do: [:i | (n at: i) >= 128 ifTrue: [k := i]].
k)
]
FloatQ class >> e [
"Returns the value of e. Hope is that it is precise enough"
<category: 'characterization'>
^16r2.B7E151628AED2A6ABF7158809CF4F3C75Eq
]
FloatQ class >> precision [
"Answer the number of bits in the mantissa. 1 + (2^-precision) = 1"
<category: 'characterization'>
^CLongDoubleBinaryDigits
]
FloatQ class >> fminNormalized [
"Return the smallest normalized FloatQ that is > 0"
<category: 'characterization'>
^CLongDoubleMin
]
FloatQ class >> fmax [
"Return the largest normalized FloatQ that is not infinite."
<category: 'characterization'>
^CLongDoubleMax
]
FloatQ class >> emax [
"Return the maximum allowable exponent for a FloatQ that is finite."
<category: 'characterization'>
^CLongDoubleMaxExp
]
FloatQ class >> emin [
"Return the maximum allowable exponent for a FloatQ that is finite."
<category: 'characterization'>
^CLongDoubleMinExp
]
FloatQ class >> decimalDigits [
"Return the number of decimal digits of precision for a FloatQ.
Technically, if P is the precision for the representation, then
the decimal precision Q is the maximum number of decimal digits
such that any floating point number with Q base 10 digits can be
rounded to a floating point number with P base 2 digits and back
again, without change to the Q decimal digits."
<category: 'characterization'>
^CLongDoubleDigits
]
FloatQ class >> log10Base2 [
"Returns the value of log2 10. Hope is that it is precise enough"
<category: 'characterization'>
^16r3.5269E12F346E2BF924AFDBFD36BF6D3362q
]
FloatQ class >> ln10 [
"Returns the value of ln 10. Hope is that it is precise enough"
<category: 'characterization'>
^16r2.4D763776AAA2B05BA95B58AE0B4C28A38Aq
]
FloatQ class >> infinity [
"Return a FloatQ that represents positive infinity."
<category: 'characterization'>
^CLongDoublePInf
]
FloatQ class >> negativeInfinity [
"Return a FloatQ that represents negative infinity."
<category: 'characterization'>
^CLongDoubleNInf
]
FloatQ class >> nan [
"Return a FloatQ that represents a mathematically indeterminate value
(e.g. Inf - Inf, Inf / Inf)."
<category: 'characterization'>
^CLongDoubleNaN
]
FloatQ class >> pi [
"Returns the value of pi. Hope is that it is precise enough"
<category: 'characterization'>
^16r3.243F6A8885A308D313198A2E0370734483q
]
zero [
"Coerce 0 to the receiver's class"
<category: 'coercing'>
^0.0q
]
half [
"Coerce 0.5 to the receiver's class"
<category: 'converting'>
^0.5q
]
unity [
"Coerce 1 to the receiver's class"
<category: 'coercing'>
^1.0q
]
coerce: aNumber [
"Coerce aNumber to the receiver's class"
<category: 'coercing'>
^aNumber asFloatQ
]
generality [
"Answer the receiver's generality"
<category: 'coercing'>
^420
]
asFloatQ [
"Just defined for completeness. Return the receiver."
<category: 'coercing'>
^self
]
ten [
"Private - Return 10, converted to the receiver's class."
<category: 'private'>
^10.0q
]
exponentLetter [
"Private - Return the letter to be printed just before the exponent"
<category: 'private'>
^$q
]
+ arg [
"Sum the receiver and arg and answer another Number"
<category: 'built ins'>
<primitive: VMpr_FloatQ_plus>
^self retrySumCoercing: arg
]
- arg [
"Subtract arg from the receiver and answer another Number"
<category: 'built ins'>
<primitive: VMpr_FloatQ_minus>
^self retryDifferenceCoercing: arg
]
< arg [
"Answer whether the receiver is less than arg"
<category: 'built ins'>
<primitive: VMpr_FloatQ_lt>
^self retryRelationalOp: #< coercing: arg
]
> arg [
"Answer whether the receiver is greater than arg"
<category: 'built ins'>
<primitive: VMpr_FloatQ_gt>
^self retryRelationalOp: #> coercing: arg
]
<= arg [
"Answer whether the receiver is less than or equal to arg"
<category: 'built ins'>
<primitive: VMpr_FloatQ_le>
^self retryRelationalOp: #<= coercing: arg
]
>= arg [
"Answer whether the receiver is greater than or equal to arg"
<category: 'built ins'>
<primitive: VMpr_FloatQ_ge>
^self retryRelationalOp: #>= coercing: arg
]
= arg [
"Answer whether the receiver is equal to arg"
<category: 'built ins'>
<primitive: VMpr_FloatQ_eq>
^self retryEqualityCoercing: arg
]
~= arg [
"Answer whether the receiver is not equal to arg"
<category: 'built ins'>
<primitive: VMpr_FloatQ_ne>
^self retryInequalityCoercing: arg
]
* arg [
"Multiply the receiver and arg and answer another Number"
<category: 'built ins'>
<primitive: VMpr_FloatQ_times>
^self retryMultiplicationCoercing: arg
]
/ arg [
"Divide the receiver by arg and answer another FloatQ"
<category: 'built ins'>
<primitive: VMpr_FloatQ_divide>
^self generality = arg generality
ifTrue: [self zeroDivide]
ifFalse: [self retryDivisionCoercing: arg]
]
asFloatD [
"Answer the receiver converted to a FloatD"
<category: 'built ins'>
<primitive: VMpr_FloatQ_asFloatD>
self primitiveFailed
]
asFloatE [
"Answer the receiver converted to a FloatE"
<category: 'built ins'>
<primitive: VMpr_FloatQ_asFloatE>
self primitiveFailed
]
truncated [
"Truncate the receiver towards zero and answer the result"
<category: 'built ins'>
<primitive: VMpr_FloatQ_truncated>
^super truncated
]
fractionPart [
"Answer the fractional part of the receiver"
<category: 'built ins'>
<primitive: VMpr_FloatQ_fractionPart>
self checkCoercion.
^self primitiveFailed
]
exponent [
"Answer the exponent of the receiver in mantissa*2^exponent
representation ( |mantissa|<=1 )"
<category: 'built ins'>
<primitive: VMpr_FloatQ_exponent>
]
timesTwoPower: arg [
"Answer the receiver multiplied by 2^arg"
<category: 'built ins'>
<primitive: VMpr_FloatQ_timesTwoPower>
]
]
|