b4a - npm Package Compare versions

Comparing version 1.3.0 to 1.3.1

lib/utf8.js

@@ -1,4 +0,1 @@
-const encoder = new TextEncoder()
-const decoder = new TextDecoder()
-
 function byteLength (string) {
@@ -28,10 +25,116 @@ let length = 0
 
-function toString (buffer) {
-  return decoder.decode(buffer)
+let toString
+
+if (typeof TextDecoder !== 'undefined') {
+  const decoder = new TextDecoder()
+
+  toString = function toString (buffer) {
+    return decoder.decode(buffer)
+  }
+} else {
+  toString = function toString (buffer) {
+    const len = buffer.byteLength
+
+    let output = ''
+    let i = 0
+
+    while (i < len) {
+      let byte = buffer[i]
+
+      if (byte <= 0x7f) {
+        output += String.fromCharCode(byte)
+        i++
+        continue
+      }
+
+      let bytesNeeded = 0
+      let codePoint = 0
+
+      if (byte <= 0xdf) {
+        bytesNeeded = 1
+        codePoint = byte & 0x1f
+      } else if (byte <= 0xef) {
+        bytesNeeded = 2
+        codePoint = byte & 0x0f
+      } else if (byte <= 0xf4) {
+        bytesNeeded = 3
+        codePoint = byte & 0x07
+      }
+
+      if (len - i - bytesNeeded > 0) {
+        let k = 0
+
+        while (k < bytesNeeded) {
+          byte = buffer[i + k + 1]
+          codePoint = (codePoint << 6) | (byte & 0x3f)
+          k += 1
+        }
+      } else {
+        codePoint = 0xfffd
+        bytesNeeded = len - i
+      }
+
+      output += String.fromCodePoint(codePoint)
+      i += bytesNeeded + 1
+    }
+
+    return output
+  }
 }
 
-function write (buffer, string, offset = 0, length = byteLength(string)) {
-  const len = Math.min(length, buffer.byteLength - offset)
-  encoder.encodeInto(string, buffer.subarray(offset, offset + len))
-  return len
+let write
+
+if (typeof TextEncoder !== 'undefined') {
+  const encoder = new TextEncoder()
+
+  write = function write (buffer, string, offset = 0, length = byteLength(string)) {
+    const len = Math.min(length, buffer.byteLength - offset)
+    encoder.encodeInto(string, buffer.subarray(offset, offset + len))
+    return len
+  }
+} else {
+  write = function write (buffer, string, offset = 0, length = byteLength(string)) {
+    const len = Math.min(length, buffer.byteLength - offset)
+
+    buffer = buffer.subarray(offset, offset + len)
+
+    let i = 0
+    let j = 0
+
+    while (i < string.length) {
+      const code = string.codePointAt(i)
+
+      if (code <= 0x7f) {
+        buffer[j++] = code
+        i++
+        continue
+      }
+
+      let count = 0
+      let bits = 0
+
+      if (code <= 0x7ff) {
+        count = 6
+        bits = 0xc0
+      } else if (code <= 0xffff) {
+        count = 12
+        bits = 0xe0
+      } else if (code <= 0x1fffff) {
+        count = 18
+        bits = 0xf0
+      }
+
+      buffer[j++] = bits | (code >> count)
+      count -= 6
+
+      while (count >= 0) {
+        buffer[j++] = 0x80 | ((code >> count) & 0x3f)
+        count -= 6
+      }
+
+      i += code >= 0x10000 ? 2 : 1
+    }
+
+    return len
+  }
 }
@@ -38,0 +141,0 @@

package.json

 {
   "name": "b4a",
-  "version": "1.3.0",
+  "version": "1.3.1",
   "description": "Bridging the gap between buffers and typed arrays",
@@ -5,0 +5,0 @@ "main": "index.js",

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Improved metrics

Total package byte prevSize

31595

increased by6.91%

Lines of code

1031

increased by8.53%

No dependency changes