compact-encoding - npm Package Compare versions

Comparing version 2.3.0 to 2.4.0

index.js

@@ -85,2 +85,19 @@ const LE = (new Uint8Array(new Uint16Array([255]).buffer))[0] === 0xff
 
+exports.float64 = {
+  preencode (state, n) {
+    state.end += 8
+  },
+  encode (state, n) {
+    const view = new DataView(state.buffer.buffer, state.start + state.buffer.byteOffset, 8)
+    view.setFloat64(0, n, true) // little endian
+    state.start += 8
+  },
+  decode (state) {
+    const view = new DataView(state.buffer.buffer, state.start + state.buffer.byteOffset, 8)
+    const float = view.getFloat64(0, true) // little endian
+    state.start += 8
+    return float
+  }
+}
+
 exports.buffer = {
@@ -87,0 +104,0 @@ preencode (state, b) {

package.json

 {
   "name": "compact-encoding",
-  "version": "2.3.0",
+  "version": "2.4.0",
   "description": "A series of compact encoding schemes for building small and fast parsers and serializers",
@@ -16,3 +16,3 @@ "main": "index.js",
     "type": "git",
-    "url": "https://github.com/mafintosh/compact-encoding.git"
+    "url": "https://github.com/compact-encoding/compact-encoding.git"
   },
@@ -22,5 +22,5 @@ "author": "Mathias Buus (@mafintosh)",
   "bugs": {
-    "url": "https://github.com/mafintosh/compact-encoding/issues"
+    "url": "https://github.com/compact-encoding/compact-encoding/issues"
   },
-  "homepage": "https://github.com/mafintosh/compact-encoding"
+  "homepage": "https://github.com/compact-encoding/compact-encoding"
 }

test.js

@@ -57,2 +57,99 @@ const enc = require('./')
 
+tape('float64', function (t) {
+  const state = enc.state()
+
+  enc.float64.preencode(state, 162.2377294)
+  t.same(state, { start: 0, end: 8, buffer: null })
+
+  state.buffer = Buffer.alloc(state.end)
+  t.same(state, { start: 0, end: 8, buffer: Buffer.from([0, 0, 0, 0, 0, 0, 0, 0]) })
+  enc.float64.encode(state, 162.2377294)
+  t.same(state, { start: 8, end: 8, buffer: Buffer.from([0x87, 0xc9, 0xaf, 0x7a, 0x9b, 0x47, 0x64, 0x40]) })
+
+  state.start = 0
+  t.same(enc.float64.decode(state), 162.2377294)
+  t.same(state.start, state.end)
+
+  t.throws(() => enc.float64.decode(state))
+
+  // alignement
+  state.start = 0
+  state.end = 0
+  state.buffer = null
+
+  enc.int.preencode(state, 0)
+  enc.float64.preencode(state, 162.2377294)
+  t.same(state, { start: 0, end: 9, buffer: null })
+
+  state.buffer = Buffer.alloc(state.end)
+  t.same(state, { start: 0, end: 9, buffer: Buffer.from([0, 0, 0, 0, 0, 0, 0, 0, 0]) })
+  enc.int.encode(state, 0)
+  enc.float64.encode(state, 162.2377294)
+  t.same(state, { start: 9, end: 9, buffer: Buffer.from([0, 0x87, 0xc9, 0xaf, 0x7a, 0x9b, 0x47, 0x64, 0x40]) })
+
+  state.start = 0
+  t.same(enc.int.decode(state), 0)
+  t.same(enc.float64.decode(state), 162.2377294)
+  t.same(state.start, state.end)
+
+  // subarray
+  const buf = Buffer.alloc(10)
+  state.start = 0
+  state.buffer = buf.subarray(1)
+  t.same(state, { start: 0, end: 9, buffer: Buffer.from([0, 0, 0, 0, 0, 0, 0, 0, 0]) })
+  enc.int.encode(state, 0)
+  enc.float64.encode(state, 162.2377294)
+  t.same(state, { start: 9, end: 9, buffer: Buffer.from([0, 0x87, 0xc9, 0xaf, 0x7a, 0x9b, 0x47, 0x64, 0x40]) })
+  t.same(buf, Buffer.from([0, 0, 0x87, 0xc9, 0xaf, 0x7a, 0x9b, 0x47, 0x64, 0x40]))
+
+  state.start = 0
+  t.same(enc.int.decode(state), 0)
+  t.same(enc.float64.decode(state), 162.2377294)
+  t.same(state.start, state.end)
+
+  // 0
+  state.start = 0
+  state.end = 0
+  state.buffer = null
+
+  enc.float64.preencode(state, 162.2377294)
+  state.buffer = Buffer.alloc(state.end)
+  enc.float64.encode(state, 0)
+  t.same(state, { start: 8, end: 8, buffer: Buffer.from([0, 0, 0, 0, 0, 0, 0, 0]) })
+
+  state.start = 0
+  t.same(enc.float64.decode(state), 0)
+  t.same(state.start, state.end)
+
+  // Infinity
+  state.start = 0
+  state.end = 0
+  state.buffer = null
+
+  enc.float64.preencode(state, Infinity)
+  state.buffer = Buffer.alloc(state.end)
+  enc.float64.encode(state, Infinity)
+  t.same(state, { start: 8, end: 8, buffer: Buffer.from([0, 0, 0, 0, 0, 0, 0xf0, 0x7f]) })
+
+  state.start = 0
+  t.same(enc.float64.decode(state), Infinity)
+  t.same(state.start, state.end)
+
+  // Edge cases
+  state.start = 0
+  state.end = 0
+  state.buffer = null
+
+  enc.float64.preencode(state, 0.1 + 0.2)
+  state.buffer = Buffer.alloc(state.end)
+  enc.float64.encode(state, 0.1 + 0.2)
+  t.same(state, { start: 8, end: 8, buffer: Buffer.from([0x34, 0x33, 0x33, 0x33, 0x33, 0x33, 0xd3, 0x3f]) })
+
+  state.start = 0
+  t.same(enc.float64.decode(state), 0.1 + 0.2)
+  t.same(state.start, state.end)
+
+  t.end()
+})
+
 tape('buffer', function (t) {
@@ -59,0 +156,0 @@ const state = enc.state()

No alert changes

Improved metrics

Total package byte prevSize

27355

increased by14.49%

Lines of code

647

increased by16.58%

No dependency changes