mirror of
https://github.com/ThatGuySam/doesitarm.git
synced 2026-05-18 06:44:46 -07:00
221 lines
6.2 KiB
JavaScript
221 lines
6.2 KiB
JavaScript
export class Reader {
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constructor( endian, word ) {
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this.endian = null
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this.word = 4
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if (endian)
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this.setEndian(endian)
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if (word)
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this.setWord(word)
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}
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setEndian(endian) {
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this.endian = /le|lsb|little/i.test(endian) ? 'le' : 'be';
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}
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setWord(word) {
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this.word = word;
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}
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readUInt8(buf, offset) {
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return buf.readUInt8(offset);
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}
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readInt8(buf, offset) {
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return buf.readInt8(offset);
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}
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readUInt16(buf, offset) {
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if (this.endian === 'le')
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return buf.readUInt16LE(offset);
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else
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return buf.readUInt16BE(offset);
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}
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readInt16(buf, offset) {
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if (this.endian === 'le')
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return buf.readInt16LE(offset);
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else
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return buf.readInt16BE(offset);
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}
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readUInt32(buf, offset) {
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if (this.endian === 'le')
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return buf.readUInt32LE(offset);
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else
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return buf.readUInt32BE(offset);
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}
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readInt32(buf, offset) {
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if (this.endian === 'le')
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return buf.readInt32LE(offset);
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else
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return buf.readInt32BE(offset);
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}
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readUInt64(buf, offset) {
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var a = this.readUInt32(buf, offset);
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var b = this.readUInt32(buf, offset + 4);
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if (this.endian === 'le')
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return a + b * 0x100000000;
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else
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return b + a * 0x100000000;
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}
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readInt64(buf, offset) {
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if (this.endian === 'le') {
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var a = this.readUInt32(buf, offset);
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var b = this.readInt32(buf, offset + 4);
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return a + b * 0x100000000;
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} else {
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var a = this.readInt32(buf, offset);
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var b = this.readUInt32(buf, offset + 4);
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return b + a * 0x100000000;
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}
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}
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readHalf(buf, offset) {
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if (this.word === 2)
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return this.readInt8(buf, offset);
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else if (this.word === 4)
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return this.readInt16(buf, offset);
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else
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return this.readInt32(buf, offset);
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}
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readUHalf(buf, offset) {
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if (this.word === 2)
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return this.readUInt8(buf, offset);
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else if (this.word === 4)
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return this.readUInt16(buf, offset);
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else
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return this.readUInt32(buf, offset);
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}
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readWord(buf, offset) {
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if (this.word === 1)
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return this.readInt8(buf, offset);
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else if (this.word === 2)
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return this.readInt16(buf, offset);
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else if (this.word === 4)
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return this.readInt32(buf, offset);
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else
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return this.readInt64(buf, offset);
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}
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readUWord(buf, offset) {
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if (this.word === 1)
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return this.readUInt8(buf, offset);
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else if (this.word === 2)
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return this.readUInt16(buf, offset);
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else if (this.word === 4)
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return this.readUInt32(buf, offset);
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else
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return this.readUInt64(buf, offset);
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}
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}
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// Reader.prototype.setEndian = function setEndian(endian) {
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// this.endian = /le|lsb|little/i.test(endian) ? 'le' : 'be';
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// };
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// Reader.prototype.setWord = function setWord(word) {
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// this.word = word;
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// };
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// Reader.prototype.readUInt8 = function readUInt8(buf, offset) {
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// return buf.readUInt8(offset);
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// };
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// Reader.prototype.readInt8 = function readInt8(buf, offset) {
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// return buf.readInt8(offset);
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// };
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// Reader.prototype.readUInt16 = function readUInt16(buf, offset) {
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// if (this.endian === 'le')
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// return buf.readUInt16LE(offset);
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// else
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// return buf.readUInt16BE(offset);
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// };
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// Reader.prototype.readInt16 = function readInt16(buf, offset) {
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// if (this.endian === 'le')
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// return buf.readInt16LE(offset);
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// else
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// return buf.readInt16BE(offset);
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// };
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// Reader.prototype.readUInt32 = function readUInt32(buf, offset) {
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// if (this.endian === 'le')
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// return buf.readUInt32LE(offset);
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// else
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// return buf.readUInt32BE(offset);
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// };
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// Reader.prototype.readInt32 = function readInt32(buf, offset) {
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// if (this.endian === 'le')
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// return buf.readInt32LE(offset);
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// else
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// return buf.readInt32BE(offset);
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// };
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// Reader.prototype.readUInt64 = function readUInt64(buf, offset) {
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// var a = this.readUInt32(buf, offset);
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// var b = this.readUInt32(buf, offset + 4);
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// if (this.endian === 'le')
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// return a + b * 0x100000000;
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// else
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// return b + a * 0x100000000;
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// };
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// Reader.prototype.readInt64 = function readInt64(buf, offset) {
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// if (this.endian === 'le') {
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// var a = this.readUInt32(buf, offset);
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// var b = this.readInt32(buf, offset + 4);
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// return a + b * 0x100000000;
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// } else {
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// var a = this.readInt32(buf, offset);
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// var b = this.readUInt32(buf, offset + 4);
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// return b + a * 0x100000000;
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// }
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// };
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// Reader.prototype.readHalf = function readHalf(buf, offset) {
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// if (this.word === 2)
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// return this.readInt8(buf, offset);
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// else if (this.word === 4)
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// return this.readInt16(buf, offset);
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// else
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// return this.readInt32(buf, offset);
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// };
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// Reader.prototype.readUHalf = function readUHalf(buf, offset) {
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// if (this.word === 2)
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// return this.readUInt8(buf, offset);
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// else if (this.word === 4)
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// return this.readUInt16(buf, offset);
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// else
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// return this.readUInt32(buf, offset);
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// };
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// Reader.prototype.readWord = function readWord(buf, offset) {
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// if (this.word === 1)
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// return this.readInt8(buf, offset);
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// else if (this.word === 2)
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// return this.readInt16(buf, offset);
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// else if (this.word === 4)
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// return this.readInt32(buf, offset);
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// else
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// return this.readInt64(buf, offset);
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// };
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// Reader.prototype.readUWord = function readUWord(buf, offset) {
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// if (this.word === 1)
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// return this.readUInt8(buf, offset);
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// else if (this.word === 2)
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// return this.readUInt16(buf, offset);
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// else if (this.word === 4)
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// return this.readUInt32(buf, offset);
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// else
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// return this.readUInt64(buf, offset);
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// };
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