[js] Add "use strict"

Author: pmurias

src/vm/js/nqp-runtime/codecs.js

@@ -0,0 +1,59 @@
+"use strict";;
+class SingleByteCodec {
+  constructor(codes) {
+    if (codes.length !== 128 && codes.length !== 256) {
+      throw new Error("invalid codes passed to SingleByteCodec");
+    }
+
+    if (codes.length === 128) {
+      let asciiString = "";
+      for (var i = 0; i < 128; i++)
+        asciiString += String.fromCharCode(i);
+      codes = asciiString + codes;
+    }
+
+    this.encodeBuf = new Buffer(65536);
+    this.encodeBuf.fill(0);
+    
+    // stored separately so that we can have a unmapped flag in encodeBuf
+    this.zero = codes.charCodeAt(0);
+    for (var i = 1; i < codes.length; i++) {
+      //console.log(codes[i] + ": " + codes.charCodeAt(i) + ' -> ' + i);
+      this.encodeBuf[codes.charCodeAt(i)] = i;
+    }
+
+    this.decodeBuf = Buffer.from(codes, 'ucs2');
+  }
+
+  encode(str) {
+    let buf = new Buffer(str.length);
+    for (let i = 0; i < str.length; i++) {
+      // TODO: surrogate check
+      const code = str.charCodeAt(i);
+      if (code === this.zero) {
+        buf[i] = 0;
+      } else {
+        const encoded = this.encodeBuf[code];
+        if (encoded === 0) {
+          console.log("unmapped character:", str[i]);
+          throw new Error("unmapped character");
+        } else {
+          buf[i] = encoded;
+        }
+      }
+    }
+
+    return buf;
+  }
+
+  decode(buf) {
+  }
+};
+
+
+const windows1252 = new SingleByteCodec("€�‚ƒ„…†‡ˆ‰Š‹Œ�Ž��‘’“”•–—˜™š›œ�žŸ ¡¢£¤¥¦§¨©ª«¬­®¯°±²³´µ¶·¸¹º»¼½¾¿ÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÐÑÒÓÔÕÖ×ØÙÚÛÜÝÞßàáâãäåæçèéêëìíîïðñòóôõö÷øùúûüýþÿ");
+
+//console.log(windows1252.encode("test"));
+//console.log(windows1252.encode("test: ☃"));
+
+module.exports.windows1252 = windows1252;

src/vm/js/nqp-runtime/core.js

@@ -1,3 +1,5 @@
+'use strict';
+
 const op = {};
 exports.op = op;
 
@@ -218,7 +220,7 @@ exports.slurpyPos = function(currentHLL, args, from) {
 
 exports.slurpyNamed = function(currentHLL, named, skip) {
   const hash = new Hash();
-  for (key in named) {
+  for (const key in named) {
     if (!skip[key]) {
       hash.content.set(key, arg(currentHLL, named[key]));
     }
@@ -309,7 +311,7 @@ op.captureexistsnamed = function(capture, arg) {
 
 op.capturenamedshash = function(currentHLL, capture) {
   const hash = new Hash();
-  for (key in capture.named) {
+  for (const key in capture.named) {
     hash.content.set(key, arg(currentHLL, capture.named[key]));
   }
   return hash;