'use strict';
/*eslint-disable no-bitwise*/
var NodeBuffer;
try {
// A trick for browserified version, to not include `Buffer` shim var _require = require; NodeBuffer = _require('buffer').Buffer;
} catch (__) {}
var Type = require('../type');
// [ 64, 65, 66 ] -> [ padding, CR, LF ] var BASE64_MAP = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=nr';
function resolveYamlBinary(data) {
if (data === null) return false; var code, idx, bitlen = 0, max = data.length, map = BASE64_MAP; // Convert one by one. for (idx = 0; idx < max; idx++) { code = map.indexOf(data.charAt(idx)); // Skip CR/LF if (code > 64) continue; // Fail on illegal characters if (code < 0) return false; bitlen += 6; } // If there are any bits left, source was corrupted return (bitlen % 8) === 0;
}
function constructYamlBinary(data) {
var idx, tailbits, input = data.replace(/[\r\n=]/g, ''), // remove CR/LF & padding to simplify scan max = input.length, map = BASE64_MAP, bits = 0, result = []; // Collect by 6*4 bits (3 bytes) for (idx = 0; idx < max; idx++) { if ((idx % 4 === 0) && idx) { result.push((bits >> 16) & 0xFF); result.push((bits >> 8) & 0xFF); result.push(bits & 0xFF); } bits = (bits << 6) | map.indexOf(input.charAt(idx)); } // Dump tail tailbits = (max % 4) * 6; if (tailbits === 0) { result.push((bits >> 16) & 0xFF); result.push((bits >> 8) & 0xFF); result.push(bits & 0xFF); } else if (tailbits === 18) { result.push((bits >> 10) & 0xFF); result.push((bits >> 2) & 0xFF); } else if (tailbits === 12) { result.push((bits >> 4) & 0xFF); } // Wrap into Buffer for NodeJS and leave Array for browser if (NodeBuffer) { // Support node 6.+ Buffer API when available return NodeBuffer.from ? NodeBuffer.from(result) : new NodeBuffer(result); } return result;
}
function representYamlBinary(object /*, style*/) {
var result = '', bits = 0, idx, tail, max = object.length, map = BASE64_MAP; // Convert every three bytes to 4 ASCII characters. for (idx = 0; idx < max; idx++) { if ((idx % 3 === 0) && idx) { result += map[(bits >> 18) & 0x3F]; result += map[(bits >> 12) & 0x3F]; result += map[(bits >> 6) & 0x3F]; result += map[bits & 0x3F]; } bits = (bits << 8) + object[idx]; } // Dump tail tail = max % 3; if (tail === 0) { result += map[(bits >> 18) & 0x3F]; result += map[(bits >> 12) & 0x3F]; result += map[(bits >> 6) & 0x3F]; result += map[bits & 0x3F]; } else if (tail === 2) { result += map[(bits >> 10) & 0x3F]; result += map[(bits >> 4) & 0x3F]; result += map[(bits << 2) & 0x3F]; result += map[64]; } else if (tail === 1) { result += map[(bits >> 2) & 0x3F]; result += map[(bits << 4) & 0x3F]; result += map[64]; result += map[64]; } return result;
}
function isBinary(object) {
return NodeBuffer && NodeBuffer.isBuffer(object);
}
module.exports = new Type('tag:yaml.org,2002:binary', {
kind: 'scalar', resolve: resolveYamlBinary, construct: constructYamlBinary, predicate: isBinary, represent: representYamlBinary
});