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string_width

2.0.3
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Layout and measure the sizes of a strings printed in the terminal!

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string_width src string_width_ffi.mjs
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src/string_width_ffi.mjs 

export function table_lookup(table, value) {

  let hi = value >> 8; // $int.bitwise_shift_right(value, 8);

  let md = (value & 0xff) >> 3; // $int.bitwise_shift_right($int.bitwise_and(value, 0xff), 3);

  let lo = value & 7; // $int.bitwise_and(value, 7);

  // return (remainderInt(

  //   $int.bitwise_shift_right(at(table, at(table, hi) * 32 + md), lo),

  //   2

  // )) !== 0;

  return ((table.byteAt(table.byteAt(hi) * 32 + md) >> lo) & 1) > 0;

}



const segmenter = new Intl.Segmenter();

export function string_fold(str, state, fun) {

  for(const { segment } of segmenter.segment(str)) {

    state = fun(state, segment)

  }

  return state

}