format-byte-size/dist/index.js

[DEPRECATED] A TypeScript library to format byte values into human-readable strings and parse them back.

// src/constants.ts
var DECIMAL_UNITS = [
  "B",
  "KB",
  "MB",
  "GB",
  "TB",
  "PB",
  "EB",
  "ZB",
  "YB"
];
var BINARY_UNITS = [
  "B",
  "KiB",
  "MiB",
  "GiB",
  "TiB",
  "PiB",
  "EiB",
  "ZiB",
  "YiB"
];
var DECIMAL_BASE = 1e3;
var BINARY_BASE = 1024;
var UNIT_MAP = {
  // Decimal units (base 1000)
  b: 1,
  byte: 1,
  bytes: 1,
  kb: 1e3,
  mb: 1e3 ** 2,
  gb: 1e3 ** 3,
  tb: 1e3 ** 4,
  pb: 1e3 ** 5,
  eb: 1e3 ** 6,
  zb: 1e3 ** 7,
  yb: 1e3 ** 8,
  // Binary units (base 1024)
  kib: 1024,
  mib: 1024 ** 2,
  gib: 1024 ** 3,
  tib: 1024 ** 4,
  pib: 1024 ** 5,
  eib: 1024 ** 6,
  zib: 1024 ** 7,
  yib: 1024 ** 8
};

// src/index.ts
function formatBytes(bytes, options) {
  if (typeof bytes !== "number") {
    throw new TypeError("Input bytes must be a number");
  }
  const {
    decimalPlaces = 2,
    useBinary = false,
    fixedDecimals = false,
    includeUnitSpace = true
  } = options || {};
  const units = useBinary ? BINARY_UNITS : DECIMAL_UNITS;
  const base = useBinary ? BINARY_BASE : DECIMAL_BASE;
  const space = includeUnitSpace ? " " : "";
  if (bytes === 0) {
    return `0${space}Bytes`;
  }
  const isNegative = bytes < 0;
  const absoluteBytes = Math.abs(bytes);
  const unitIndex = absoluteBytes < 1 ? 0 : Math.min(
    Math.floor(Math.log(absoluteBytes) / Math.log(base)),
    units.length - 1
  );
  const value = absoluteBytes / Math.pow(base, unitIndex);
  const formattedValue = fixedDecimals ? value.toFixed(decimalPlaces) : parseFloat(value.toFixed(decimalPlaces)).toString();
  const sign = isNegative ? "-" : "";
  const unit = units[unitIndex];
  return `${sign}${formattedValue}${space}${unit}`;
}
function parseBytes(sizeString) {
  if (typeof sizeString !== "string") {
    throw new TypeError("Input sizeString must be a string");
  }
  const trimmed = sizeString.trim();
  if (!trimmed) {
    return null;
  }
  const match = trimmed.match(/^(-?\d+(?:\.\d+)?)\s*([a-z]+)?$/i);
  if (!match) {
    return null;
  }
  const [, valueStr, unit] = match;
  const value = parseFloat(valueStr);
  if (isNaN(value)) {
    return null;
  }
  if (!unit) {
    return value;
  }
  const unitLower = unit.toLowerCase();
  const multiplier = UNIT_MAP[unitLower];
  if (multiplier === void 0) {
    return null;
  }
  return value * multiplier;
}

export { formatBytes, parseBytes };
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