[REBOL] Bug in plugin ROUND function
From: joseantoniorocha::gmail::com at: 12-Jan-2007 17:13
There is a bug in puglin ROUND function:
The ROUND in plugin:
round: func [
[catch]
n [number! money! time!]
/even
/down
/half-down
/floor
/ceiling
/half-ceiling
/to
scale [number! money! time!]
/local m
][
throw-on-error [
scale: abs any [scale 1]
any [number? n scale: make n scale]
make scale either any [even half-ceiling] [
m: 0,.0 * scale + n
any [
all [
m = m: m - mod m scale
even
positive? m - n
m - mod m scale + scale
]
m
]
] [
any [
floor
ceiling
(ceiling: (found? half-down) xor negative? n down)
n: add n scale * pick [0,.0 0,.0] ceiling
]
either ceiling [n + mod negate n scale] [n - mod n scale]
]
]
]
ROUND in VIEW:
round: func [
{Returns the nearest integer. Halves round up (away from zero) by
default.}
[catch]
n [number! money! time!] "The value to round"
/even "Halves round toward even results"
/down {Round toward zero, ignoring discarded digits. (truncate)}
/half-down "Halves round toward zero"
/floor "Round in negative direction"
/ceiling "Round in positive direction"
/half-ceiling "Halves round in positive direction"
/to "Return the nearest multiple of the scale parameter"
scale [number! money! time!] "Must be a non-zero value"
/local m
][
throw-on-error [
scale: abs any [scale 1]
any [number? n scale: make n scale]
make scale either any [even half-ceiling] [
m: 0.5 * scale + n
any [
all [
m = m: m - mod m scale
even
positive? m - n
m - mod m scale + scale
]
m
]
] [
any [
floor
ceiling
(ceiling: (found? half-down) xor negative? n down)
n: add n scale * pick [-0.5 0.5] ceiling
]
either ceiling [n + mod negate n scale] [n - mod n scale]
]
]
]
--
nome: "José Antonio Meira da Rocha" tratamento: "Prof. MS."
atividade: "Ensino e pesquisa em mídias digitais"
googletalk: email: MSN: joseantoniorocha-gmail.com
site: http://meiradarocha.jor.br ICQ: 658222 Skype: "meiradarocha_jor"
