use fixed_decimal for decimal formatting

korrat

Sep 29, 2022, 5:50 PM

M7VINXOFAKFTEKQZR3RFO3WJQ3RXE2TWD4YAVKTPLMJWC4LISTIQC

Dependencies

[2] SJ6AFVZL remove const configuration in favor of runtime config
[3] KWGWHKJR introduce ensure_column and use it for padding account names
[4] QRIJE4AQ add a simple pretty printer for beancount directives
[*] ND7GASJ4 track current column position when writing
[*] I2P2FTLE add basic parser for german decimals
[*] ONRIF4V7 add basic snapshot test for pretty printer
[*] YDK6X6PP add a library of important types for beancount
[*] D6UTHZA4 add a simple writer for saving a set of directives to a tree of files

Change contents

edit in common/beancount-pretty-printer/src/lib.rs at line 8

[6.26]

[3.274]

use fixed_decimal::FixedDecimal;
use fixed_decimal::Sign;
edit in common/beancount-pretty-printer/src/lib.rs at line 90

[3.1716]→[3.1716:1760](∅→∅)

// TODO prevent trailing whitespace
replacement in common/beancount-pretty-printer/src/lib.rs at line 106

[3.2307]→[3.2307:2359](∅→∅)

self.inner.write_all(b"\n\n")?;

[3.2307]

[3.2359]

self.inner.write_all(b"\n")?;
replacement in common/beancount-pretty-printer/src/lib.rs at line 109

[3.2378]→[3.2378:2426](∅→∅)

self.print_directive(directive)

[3.2378]

[3.2426]

self.print_directive(directive)?;
self.inner.write_all(b"\n")
replacement in common/beancount-pretty-printer/src/lib.rs at line 168

[3.4001]→[2.2047:2096](∅→∅),[2.2096]→[3.50:51](∅→∅),[3.50]→[3.50:51](∅→∅),[3.51]→[2.2097:2187](∅→∅),[2.2187]→[3.4113:4114](∅→∅),[3.4113]→[3.4113:4114](∅→∅),[3.4114]→[2.2188:2224](∅→∅)

let decimals = decimal.scale() as usize;

let mut buffer = [b' '; 64];
write!(buffer.as_mut_slice(), "{decimal}")?;

let buffer = buffer.trim();

[3.4001]

[3.4248]

let decimal = fixed_decimal_from(decimal);
replacement in common/beancount-pretty-printer/src/lib.rs at line 171

[2.2340]→[2.2340:2415](∅→∅)

let integral_digits = buffer.graphemes().count() - (decimals + 1);

[2.2340]

[2.2415]

let sign_width = matches!(decimal.sign(), Sign::Negative) as usize;
let integral_width = decimal.nonzero_magnitude_start().try_into().unwrap_or(0) + 1;
replacement in common/beancount-pretty-printer/src/lib.rs at line 175

[2.2434]→[2.2434:2544](∅→∅)

.ensure_column(decimal_separator_column - integral_digits)?;
self.inner.write_all(buffer)

[2.2434]

[3.4320]

.ensure_column(decimal_separator_column - (sign_width + integral_width))?;
write!(self.inner, "{decimal}")
edit in common/beancount-pretty-printer/src/lib.rs at line 256

[6.915]

fn fixed_decimal_from(decimal: &Decimal) -> FixedDecimal {
let scale: i16 = decimal.scale().try_into().unwrap();
FixedDecimal::from(decimal.mantissa()).multiplied_pow10(-scale)
}
edit in common/beancount-pretty-printer/Cargo.toml at line 14

[6.1033]

[6.1033]

fixed_decimal.workspace = true
edit in Cargo.toml at line 11

[6.1079]

[8.2350]

fixed_decimal = "0.5.0"
edit in Cargo.lock at line 62

[6.1089]

[8.2495]

"fixed_decimal",
edit in Cargo.lock at line 270

[9.28291]

[9.28291]

name = "displaydoc"
version = "0.2.3"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "3bf95dc3f046b9da4f2d51833c0d3547d8564ef6910f5c1ed130306a75b92886"
dependencies = [
"proc-macro2",
"quote",
"syn",
]

[[package]]
edit in Cargo.lock at line 315

[9.28892]

[9.28892]

]

[[package]]
name = "fixed_decimal"
version = "0.5.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "ceab5dbd7a3a08385160503f6b6636420dbd72d29babdf8c894d4534304191c3"
dependencies = [
"displaydoc",
"smallvec",
"static_assertions",
"writeable",
edit in Cargo.lock at line 1069

[10.15689]

[9.39189]

name = "writeable"
version = "0.5.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "f8e6ab4f5da1b24daf2c590cfac801bacb27b15b4f050e84eb60149ea726f06b"

[[package]]