ironcalc_base 0.7.1

Open source spreadsheet engine
Documentation 
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/// Excel compatibility values
/// COLUMN_WIDTH and ROW_HEIGHT are pixel values
/// A column width of Excel value `w` will result in `w * COLUMN_WIDTH_FACTOR` pixels
/// Note that these constants are inlined
pub(crate) const DEFAULT_COLUMN_WIDTH: f64 = 125.0;
pub(crate) const DEFAULT_ROW_HEIGHT: f64 = 28.0;
pub(crate) const COLUMN_WIDTH_FACTOR: f64 = 12.0;
pub(crate) const ROW_HEIGHT_FACTOR: f64 = 2.0;
pub(crate) const DEFAULT_WINDOW_HEIGHT: i64 = 600;
pub(crate) const DEFAULT_WINDOW_WIDTH: i64 = 800;

pub(crate) const LAST_COLUMN: i32 = 16_384;
pub(crate) const LAST_ROW: i32 = 1_048_576;

// Excel uses 15 significant digits of precision for all numeric calculations.
pub(crate) const EXCEL_PRECISION: usize = 15;

// 693_594 is computed as:
// NaiveDate::from_ymd(1900, 1, 1).num_days_from_ce() - 2
// The 2 days offset is because of Excel 1900 bug
pub(crate) const EXCEL_DATE_BASE: i32 = 693_594;

// We do not support dates before 1899-12-31.
pub(crate) const MINIMUM_DATE_SERIAL_NUMBER: i32 = 1;

// Excel can handle dates until the year 9999-12-31
// 2958465 is the number of days from 1900-01-01 to 9999-12-31
pub(crate) const MAXIMUM_DATE_SERIAL_NUMBER: i32 = 2_958_465;