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// Ported from js-yaml v3.13.1:// https://github.com/nodeca/js-yaml/commit/665aadda42349dcae869f12040d9b10ef18d12da// Copyright 2011-2015 by Vitaly Puzrin. All rights reserved. MIT license.// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.
import { Type } from "../type.ts";import { Any, isNegativeZero } from "../utils.ts";
function isHexCode(c: number): boolean {  return (    (0x30 <= /* 0 */ c && c <= 0x39) /* 9 */ ||    (0x41 <= /* A */ c && c <= 0x46) /* F */ ||    (0x61 <= /* a */ c && c <= 0x66) /* f */  );}
function isOctCode(c: number): boolean {  return 0x30 <= /* 0 */ c && c <= 0x37 /* 7 */;}
function isDecCode(c: number): boolean {  return 0x30 <= /* 0 */ c && c <= 0x39 /* 9 */;}
function resolveYamlInteger(data: string): boolean {  const max = data.length;  let index = 0;  let hasDigits = false;
  if (!max) return false;
  let ch = data[index];
  // sign  if (ch === "-" || ch === "+") {    ch = data[++index];  }
  if (ch === "0") {    // 0    if (index + 1 === max) return true;    ch = data[++index];
    // base 2, base 8, base 16
    if (ch === "b") {      // base 2      index++;
      for (; index < max; index++) {        ch = data[index];        if (ch === "_") continue;        if (ch !== "0" && ch !== "1") return false;        hasDigits = true;      }      return hasDigits && ch !== "_";    }
    if (ch === "x") {      // base 16      index++;
      for (; index < max; index++) {        ch = data[index];        if (ch === "_") continue;        if (!isHexCode(data.charCodeAt(index))) return false;        hasDigits = true;      }      return hasDigits && ch !== "_";    }
    // base 8    for (; index < max; index++) {      ch = data[index];      if (ch === "_") continue;      if (!isOctCode(data.charCodeAt(index))) return false;      hasDigits = true;    }    return hasDigits && ch !== "_";  }
  // base 10 (except 0) or base 60
  // value should not start with `_`;  if (ch === "_") return false;
  for (; index < max; index++) {    ch = data[index];    if (ch === "_") continue;    if (ch === ":") break;    if (!isDecCode(data.charCodeAt(index))) {      return false;    }    hasDigits = true;  }
  // Should have digits and should not end with `_`  if (!hasDigits || ch === "_") return false;
  // if !base60 - done;  if (ch !== ":") return true;
  // base60 almost not used, no needs to optimize  return /^(:[0-5]?[0-9])+$/.test(data.slice(index));}
function constructYamlInteger(data: string): number {  let value = data;  const digits: number[] = [];
  if (value.indexOf("_") !== -1) {    value = value.replace(/_/g, "");  }
  let sign = 1;  let ch = value[0];  if (ch === "-" || ch === "+") {    if (ch === "-") sign = -1;    value = value.slice(1);    ch = value[0];  }
  if (value === "0") return 0;
  if (ch === "0") {    if (value[1] === "b") return sign * parseInt(value.slice(2), 2);    if (value[1] === "x") return sign * parseInt(value, 16);    return sign * parseInt(value, 8);  }
  if (value.indexOf(":") !== -1) {    value.split(":").forEach((v) => {      digits.unshift(parseInt(v, 10));    });
    let valueInt = 0;    let base = 1;
    digits.forEach((d) => {      valueInt += d * base;      base *= 60;    });
    return sign * valueInt;  }
  return sign * parseInt(value, 10);}
function isInteger(object: Any): boolean {  return (    Object.prototype.toString.call(object) === "[object Number]" &&    object % 1 === 0 &&    !isNegativeZero(object)  );}
export const int = new Type("tag:yaml.org,2002:int", {  construct: constructYamlInteger,  defaultStyle: "decimal",  kind: "scalar",  predicate: isInteger,  represent: {    binary(obj: number): string {      return obj >= 0        ? `0b${obj.toString(2)}`        : `-0b${obj.toString(2).slice(1)}`;    },    octal(obj: number): string {      return obj >= 0 ? `0${obj.toString(8)}` : `-0${obj.toString(8).slice(1)}`;    },    decimal(obj: number): string {      return obj.toString(10);    },    hexadecimal(obj: number): string {      return obj >= 0        ? `0x${obj.toString(16).toUpperCase()}`        : `-0x${obj.toString(16).toUpperCase().slice(1)}`;    },  },  resolve: resolveYamlInteger,  styleAliases: {    binary: [2, "bin"],    decimal: [10, "dec"],    hexadecimal: [16, "hex"],    octal: [8, "oct"],  },});