@xyo-network/buffer-utils - npm Package Compare versions

Comparing version 0.2.1 to 0.3.0

dist/index.d.ts

 /// <reference types="node" />
-/** Returns a pseudo-hash based off the contents of a buffer */
-export declare function getBufferHash(buffer: Buffer): number;
 /** A helper function to write a number to a buffer that supports multiple sizes and signings */
-export declare function writeNumberToBuffer(numberToWrite: number, bytes: number, isSigned: boolean, buffer?: Buffer, offset?: number): Buffer;
+export declare function writeIntegerToBuffer(numberToWrite: number, bytes: number, isSigned: boolean, buffer?: Buffer, offset?: number): Buffer;
 /** A helper function to read a number from a buffer based off of sign by */
-export declare function readNumberFromBuffer(buffer: Buffer, bytes: number, isSigned: boolean, offset?: number): number;
+export declare function readIntegerFromBuffer(buffer: Buffer, bytes: number, isSigned: boolean, offset?: number): number;
 export declare function writePointTo32ByteBuffer(point: Buffer): Buffer;
-export declare function unsignedNumberToBuffer(num: number): Buffer;
-export declare function signedNumberToBuffer(num: number): Buffer;
+export declare function unsignedIntegerToBuffer(num: number): Buffer;
+export declare function signedIntegerToBuffer(num: number): Buffer;
+export declare function doubleToBuffer(num: number): Buffer;
+export declare function floatToBuffer(num: number): Buffer;
+export declare function readDoubleFromBuffer(buffer: Buffer, offset?: number): number;
+export declare function readFloatFromBuffer(buffer: Buffer, offset?: number): number;
 //# sourceMappingURL=index.d.ts.map

dist/index.js

@@ -8,24 +8,14 @@ "use strict";
  * @Last modified by: ryanxyo
- * @Last modified time: Wednesday, 28th November 2018 5:50:00 pm
+ * @Last modified time: Tuesday, 11th December 2018 9:14:17 am
  * @License: All Rights Reserved
  * @Copyright: Copyright XY | The Findables Company
  */
+var __importDefault = (this && this.__importDefault) || function (mod) {
+    return (mod && mod.__esModule) ? mod : { "default": mod };
+};
 Object.defineProperty(exports, "__esModule", { value: true });
 const errors_1 = require("@xyo-network/errors");
-/** Returns a pseudo-hash based off the contents of a buffer */
-function getBufferHash(buffer) {
-    if (buffer.length === 0) {
-        return 0;
-    }
-    let hash = buffer.length;
-    buffer.forEach((byte, index) => {
-        hash += index;
-        hash += byte;
-        return hash * 31 * (index + byte);
-    });
-    return hash;
-}
-exports.getBufferHash = getBufferHash;
+const bn_js_1 = __importDefault(require("bn.js"));
 /** A helper function to write a number to a buffer that supports multiple sizes and signings */
-function writeNumberToBuffer(numberToWrite, bytes, isSigned, buffer, offset) {
+function writeIntegerToBuffer(numberToWrite, bytes, isSigned, buffer, offset) {
     const buf = buffer || Buffer.alloc(bytes);
@@ -58,2 +48,10 @@ const bufOffset = offset || 0;
             return buf;
+        case 8:
+            const bigNumberBuffer = new bn_js_1.default(numberToWrite).toBuffer('be', 8);
+            let i = 0;
+            while (i < 8) {
+                buf[i + bufOffset] = bigNumberBuffer[i];
+                i += 1;
+            }
+            return buf;
         default:
@@ -63,5 +61,5 @@ throw new errors_1.XyoError(`Could not write number to buffer`, errors_1.XyoErrors.CRITICAL);
 }
-exports.writeNumberToBuffer = writeNumberToBuffer;
+exports.writeIntegerToBuffer = writeIntegerToBuffer;
 /** A helper function to read a number from a buffer based off of sign by */
-function readNumberFromBuffer(buffer, bytes, isSigned, offset) {
+function readIntegerFromBuffer(buffer, bytes, isSigned, offset) {
     const bufOffset = offset || 0;
@@ -87,2 +85,4 @@ if (isSigned) {
             return buffer.readUInt32BE(bufOffset);
+        case 8:
+            return new bn_js_1.default(buffer.slice(bufOffset || 0, bufOffset + bytes)).toNumber();
         default:
@@ -92,3 +92,3 @@ throw new errors_1.XyoError(`Could not read number from buffer`, errors_1.XyoErrors.CRITICAL);
 }
-exports.readNumberFromBuffer = readNumberFromBuffer;
+exports.readIntegerFromBuffer = readIntegerFromBuffer;
 function writePointTo32ByteBuffer(point) {
@@ -108,3 +108,3 @@ if (point.length === 32) {
 exports.writePointTo32ByteBuffer = writePointTo32ByteBuffer;
-function unsignedNumberToBuffer(num) {
+function unsignedIntegerToBuffer(num) {
     let buf;
@@ -124,3 +124,3 @@ if (num <= Math.pow(2, 8) - 1) {
     else if (num > Math.pow(2, 32)) {
-        throw new errors_1.XyoError('This is not yet supported', errors_1.XyoErrors.CRITICAL);
+        buf = new bn_js_1.default(num).toBuffer('be');
     }
@@ -132,4 +132,4 @@ else {
 }
-exports.unsignedNumberToBuffer = unsignedNumberToBuffer;
-function signedNumberToBuffer(num) {
+exports.unsignedIntegerToBuffer = unsignedIntegerToBuffer;
+function signedIntegerToBuffer(num) {
     let buf;
@@ -156,3 +156,23 @@ if (num <= Math.pow(2, 7) - 1) {
 }
-exports.signedNumberToBuffer = signedNumberToBuffer;
+exports.signedIntegerToBuffer = signedIntegerToBuffer;
+function doubleToBuffer(num) {
+    const b = Buffer.alloc(8);
+    b.writeDoubleBE(num, 0);
+    return b;
+}
+exports.doubleToBuffer = doubleToBuffer;
+function floatToBuffer(num) {
+    const b = Buffer.alloc(4);
+    b.writeFloatBE(num, 0);
+    return b;
+}
+exports.floatToBuffer = floatToBuffer;
+function readDoubleFromBuffer(buffer, offset = 0) {
+    return buffer.readDoubleBE(offset);
+}
+exports.readDoubleFromBuffer = readDoubleFromBuffer;
+function readFloatFromBuffer(buffer, offset = 0) {
+    return buffer.readFloatBE(offset);
+}
+exports.readFloatFromBuffer = readFloatFromBuffer;
 //# sourceMappingURL=index.js.map

package.json

 {
   "name": "@xyo-network/buffer-utils",
-  "version": "0.2.1",
+  "version": "0.3.0",
   "description": "Buffer Utilities",
@@ -10,5 +10,7 @@ "main": "dist/index.js",
   "dependencies": {
-    "@xyo-network/errors": "^0.2.1"
+    "@xyo-network/errors": "^0.3.0",
+    "bn.js": "^4.11.8"
   },
   "devDependencies": {
+    "@types/bn.js": "^4.11.2",
     "@types/jest": "^23.3.1",
@@ -22,3 +24,3 @@ "@types/node": "^10.7.1",
   },
-  "gitHead": "0635d162b742fbb5ee4f09d4e3faf5149b43eaf0"
+  "gitHead": "55319bda08512a2701fb6494ad2e2526791e6bb7"
 }

src/index.ts

@@ -7,3 +7,3 @@ /*
  * @Last modified by: ryanxyo
- * @Last modified time: Wednesday, 28th November 2018 5:50:00 pm
+ * @Last modified time: Tuesday, 11th December 2018 9:14:17 am
  * @License: All Rights Reserved
@@ -14,22 +14,6 @@ * @Copyright: Copyright XY | The Findables Company
 import { XyoError, XyoErrors } from "@xyo-network/errors"
+import BN from 'bn.js'
 
-/** Returns a pseudo-hash based off the contents of a buffer */
-export function getBufferHash(buffer: Buffer): number {
-  if (buffer.length === 0) {
-    return 0
-  }
-
-  let hash = buffer.length
-
-  buffer.forEach((byte: number, index: number) => {
-    hash += index
-    hash += byte
-    return hash * 31 * (index + byte)
-  })
-
-  return hash
-}
-
 /** A helper function to write a number to a buffer that supports multiple sizes and signings */
-export function writeNumberToBuffer(
+export function writeIntegerToBuffer(
   numberToWrite: number,
@@ -70,2 +54,10 @@ bytes: number,
       return buf
+    case 8:
+      const bigNumberBuffer = new BN(numberToWrite).toBuffer('be', 8)
+      let i = 0
+      while (i < 8) {
+        buf[i + bufOffset] = bigNumberBuffer[i]
+        i += 1
+      }
+      return buf
     default:
@@ -77,3 +69,3 @@ throw new XyoError(`Could not write number to buffer`, XyoErrors.CRITICAL)
 /** A helper function to read a number from a buffer based off of sign by */
-export function readNumberFromBuffer(buffer: Buffer, bytes: number, isSigned: boolean, offset?: number) {
+export function readIntegerFromBuffer(buffer: Buffer, bytes: number, isSigned: boolean, offset?: number) {
   const bufOffset = offset || 0
@@ -101,2 +93,4 @@
       return buffer.readUInt32BE(bufOffset)
+    case 8:
+      return new BN(buffer.slice(bufOffset || 0, bufOffset + bytes)).toNumber()
     default:
@@ -123,3 +117,3 @@ throw new XyoError(`Could not read number from buffer`, XyoErrors.CRITICAL)
 
-export function unsignedNumberToBuffer(num: number): Buffer {
+export function unsignedIntegerToBuffer(num: number): Buffer {
   let buf: Buffer
@@ -137,3 +131,3 @@
   } else if (num > Math.pow(2, 32)) {
-    throw new XyoError('This is not yet supported', XyoErrors.CRITICAL)
+    buf = new BN(num).toBuffer('be')
   } else {
@@ -146,3 +140,3 @@ throw new XyoError('This should never happen', XyoErrors.CRITICAL)
 
-export function signedNumberToBuffer(num: number): Buffer {
+export function signedIntegerToBuffer(num: number): Buffer {
   let buf: Buffer
@@ -167,1 +161,21 @@
 }
+
+export function doubleToBuffer(num: number): Buffer {
+  const b = Buffer.alloc(8)
+  b.writeDoubleBE(num, 0)
+  return b
+}
+
+export function floatToBuffer(num: number): Buffer {
+  const b = Buffer.alloc(4)
+  b.writeFloatBE(num, 0)
+  return b
+}
+
+export function readDoubleFromBuffer(buffer: Buffer, offset: number = 0): number {
+  return buffer.readDoubleBE(offset)
+}
+
+export function readFloatFromBuffer(buffer: Buffer, offset: number = 0): number {
+  return buffer.readFloatBE(offset)
+}

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Improved metrics

Total package byte prevSize

18134

increased by14.06%

Lines of code

358

increased by11.18%

Worsened metrics

Dependency count

2

increased by100%

Dev dependency count

8

increased by14.29%

Dependency changes

• + Addedbn.js@^4.11.8

• + Added@xyo-network/base@0.3.1(transitive)

• + Added@xyo-network/errors@0.3.1(transitive)

• + Addedbn.js@4.12.1(transitive)

• - Removed@xyo-network/base@0.2.1(transitive)

• - Removed@xyo-network/errors@0.2.1(transitive)

• Updated@xyo-network/errors@^0.3.0