AMD port, plus bugfixes

README.md

@@ -19,4 +19,4 @@ Using it
 Simplest way is just to call jszlib_uncompress.  Takes an ArrayBuffer, returns an ArrayBuffer,
 throws an exception if something breaks.  You can also use a ZStream class which behaves
 much like ZStream from jzlib.  This might be useful if you need to uncompress partial data --
-some kinds of streaming network protocol, for instance -- but is overkill for most applications.
+some kinds of streaming network protocol, for instance -- but is overkill for most applications.

arrayCopy.js

@@ -0,0 +1,48 @@
+define([],
+       function() {
+
+var testArray;
+try {
+    testArray = new Uint8Array(1);
+} catch (x) {}
+var hasSlice = false; /* (typeof testArray.slice === 'function'); */ // Chrome slice performance is so dire that we're currently not using it...
+
+function arrayCopy(src, srcOffset, dest, destOffset, count) {
+    if (count == 0) {
+        return;
+    }
+    if (!src) {
+        throw "Undef src";
+    } else if (!dest) {
+        throw "Undef dest";
+    }
+
+    if (srcOffset == 0 && count == src.length) {
+        arrayCopy_fast(src, dest, destOffset);
+    } else if ( src.subarray ) {
+        arrayCopy_fast(src.subarray(srcOffset, srcOffset + count), dest, destOffset);
+    } else if (src.BYTES_PER_ELEMENT == 1 && count > 100) {
+        arrayCopy_fast(new Uint8Array(src.buffer, src.byteOffset + srcOffset, count), dest, destOffset);
+    } else {
+        arrayCopy_slow(src, srcOffset, dest, destOffset, count);
+    }
+
+}
+
+function arrayCopy_slow(src, srcOffset, dest, destOffset, count) {
+
+    // dlog('_slow call: srcOffset=' + srcOffset + '; destOffset=' + destOffset + '; count=' + count);
+
+     for (var i = 0; i < count; ++i) {
+        dest[destOffset + i] = src[srcOffset + i];
+    }
+}
+
+function arrayCopy_fast(src, dest, destOffset) {
+    dest.set(src, destOffset);
+}
+
+
+return arrayCopy;
+
+});