bit-prefix-len - npm Package Compare versions

Comparing version 0.1.0 to 0.2.0

index.js

@@ -5,6 +5,12 @@ module.exports = bitPrefixLen
 // e.g. bitPrefixLen(new Buffer(00001010100), 0) == 4
-function bitPrefixLen(buf, bit) {
+function bitPrefixLen(bit, buf) {
+  if (!(buf instanceof Buffer))
+    throw new Error('buf must be a buffer')
+
+  if (bit !== 0 && bit !== 1)
+    throw new Error('bit must be 1 or 0')
+
   for (var i = 0; i < buf.length; i++) {
     for (var j = 0; j < 8; j++) {
-      if ((buf[i] >> (7 - j)) & 0x1 != 0) {
+      if (((buf[i] >> (7 - j)) & 0x1) != bit) {
         return i * 8 + j;
@@ -11,0 +17,0 @@ }

package.json

 {
   "name": "bit-prefix-len",
-  "version": "0.1.0",
+  "version": "0.2.0",
   "description": "return length of a prefix in a buffer",
@@ -26,4 +26,3 @@ "main": "index.js",
   },
-  "dependencies": {
-  },
+  "dependencies": {},
   "devDependencies": {
@@ -30,0 +29,0 @@ "tape": "~2.13.2"

test.js

 var test = require('tape')
 bitPrefixLen = require('./index')
 
-test('basic', function(t) {
-  t.equal(bitPrefixLen(new Buffer('0000abc00abc', 'hex')), 4 * 4)
-  t.equal(bitPrefixLen(new Buffer('000000000000', 'hex')), 12 * 4)
-  t.equal(bitPrefixLen(new Buffer('000000000001', 'hex')), 12 * 4 - 1)
-  t.equal(bitPrefixLen(new Buffer([4, 12, 12])), 5)
+test('0', function(t) {
+  t.equal(bitPrefixLen(0, new Buffer('0000abc00abc', 'hex')), 4 * 4)
+  t.equal(bitPrefixLen(0, new Buffer('000000000000', 'hex')), 12 * 4)
+  t.equal(bitPrefixLen(0, new Buffer('ffffffffffff', 'hex')), 0)
+  t.equal(bitPrefixLen(0, new Buffer('800000000000', 'hex')), 0)
+  t.equal(bitPrefixLen(0, new Buffer('000000000001', 'hex')), 12 * 4 - 1)
+  t.equal(bitPrefixLen(0, new Buffer([4, 12, 12])), 5)
   t.end()
 })
+
+test('1', function(t) {
+  t.equal(bitPrefixLen(1, new Buffer('ffff00c00abc', 'hex')), 4 * 4)
+  t.equal(bitPrefixLen(1, new Buffer('ffffffffffff', 'hex')), 12 * 4)
+  t.equal(bitPrefixLen(1, new Buffer('000000000000', 'hex')), 0)
+  t.equal(bitPrefixLen(1, new Buffer('800000000000', 'hex')), 1)
+  t.equal(bitPrefixLen(1, new Buffer('000000000001', 'hex')), 0)
+  t.equal(bitPrefixLen(1, new Buffer('fffffffffffe', 'hex')), 12 * 4 - 1)
+  t.equal(bitPrefixLen(1, new Buffer('11111111111e', 'hex')), 0)
+  t.equal(bitPrefixLen(1, new Buffer([255, 128, 12, 12])), 9)
+  t.end()
+})

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Improved metrics

Total package byte prevSize

2915

increased by114.5%

Number of package files

5

increased by66.67%

Lines of code

45

increased by104.55%

Number of medium quality alerts

1

decreased by-50%

Number of lines in readme file

16

increased byInfinity%

No dependency changes