init

vendor/pako/lib/utils/common.js

@@ -0,0 +1,45 @@
+// reduce buffer size, avoiding mem copy
+export function shrinkBuf (buf, size) {
+  if (buf.length === size) { return buf; }
+  if (buf.subarray) { return buf.subarray(0, size); }
+  buf.length = size;
+  return buf;
+};
+
+
+export function arraySet (dest, src, src_offs, len, dest_offs) {
+  if (src.subarray && dest.subarray) {
+    dest.set(src.subarray(src_offs, src_offs + len), dest_offs);
+    return;
+  }
+  // Fallback to ordinary array
+  for (var i = 0; i < len; i++) {
+    dest[dest_offs + i] = src[src_offs + i];
+  }
+}
+
+// Join array of chunks to single array.
+export function flattenChunks (chunks) {
+  var i, l, len, pos, chunk, result;
+
+  // calculate data length
+  len = 0;
+  for (i = 0, l = chunks.length; i < l; i++) {
+    len += chunks[i].length;
+  }
+
+  // join chunks
+  result = new Uint8Array(len);
+  pos = 0;
+  for (i = 0, l = chunks.length; i < l; i++) {
+    chunk = chunks[i];
+    result.set(chunk, pos);
+    pos += chunk.length;
+  }
+
+  return result;
+}
+
+export var Buf8  = Uint8Array;
+export var Buf16 = Uint16Array;
+export var Buf32 = Int32Array;