Handle edge cases in basic JSON.stringify.

src/json.js

Index: src/json.js
diff --git a/src/json.js b/src/json.js
index 608cb7109d972f5981be6f51fefa17aab6ebc2ab..cc7fd7c662fd55f40c865f0d86a82389f0dc5fdb 100644
--- a/src/json.js
+++ b/src/json.js
@@ -178,143 +178,9 @@ function JSONSerialize(key, holder, replacer, stack, indent, gap) {
 }
 
 
-function BasicSerializeArray(value, stack, builder) {
-  var len = value.length;
-  if (len == 0) {
-    builder.push("[]");
-    return;
-  }
-  if (!%PushIfAbsent(stack, value)) {
-    throw MakeTypeError('circular_structure', $Array());
-  }
-  builder.push("[");
-  var val = value[0];
-  if (IS_STRING(val)) {
-    // First entry is a string. Remaining entries are likely to be strings too.
-    var array_string = %QuoteJSONStringArray(value);
-    if (!IS_UNDEFINED(array_string)) {
-      // array_string also includes bracket characters so we are done.
-      builder[builder.length - 1] = array_string;
-      stack.pop();
-      return;
-    } else {
-      builder.push(%QuoteJSONString(val));
-      for (var i = 1; i < len; i++) {
-        val = value[i];
-        if (IS_STRING(val)) {
-          builder.push(%QuoteJSONStringComma(val));
-        } else {
-          builder.push(",");
-          var before = builder.length;
-          BasicJSONSerialize(i, val, stack, builder);
-          if (before == builder.length) builder[before - 1] = ",null";
-        }
-      }
-    }
-  } else if (IS_NUMBER(val)) {
-    // First entry is a number. Remaining entries are likely to be numbers too.
-    builder.push(JSON_NUMBER_TO_STRING(val));
-    for (var i = 1; i < len; i++) {
-      builder.push(",");
-      val = value[i];
-      if (IS_NUMBER(val)) {
-        builder.push(JSON_NUMBER_TO_STRING(val));
-      } else {
-        var before = builder.length;
-        BasicJSONSerialize(i, val, stack, builder);
-        if (before == builder.length) builder[before - 1] = ",null";
-      }
-    }
-  } else {
-    var before = builder.length;
-    BasicJSONSerialize(0, val, stack, builder);
-    if (before == builder.length) builder.push("null");
-    for (var i = 1; i < len; i++) {
-      builder.push(",");
-      before = builder.length;
-      BasicJSONSerialize(i, value[i], stack, builder);
-      if (before == builder.length) builder[before - 1] = ",null";
-    }
-  }
-  stack.pop();
-  builder.push("]");
-}
-
-
-function BasicSerializeObject(value, stack, builder) {
-  if (!%PushIfAbsent(stack, value)) {
-    throw MakeTypeError('circular_structure', $Array());
-  }
-  builder.push("{");
-  var first = true;
-  var keys = %ObjectKeys(value);
-  var len = keys.length;
-  for (var i = 0; i < len; i++) {
-    var p = keys[i];
-    if (!first) {
-      builder.push(%QuoteJSONStringComma(p));
-    } else {
-      builder.push(%QuoteJSONString(p));
-    }
-    builder.push(":");
-    var before = builder.length;
-    BasicJSONSerialize(p, value[p], stack, builder);
-    if (before == builder.length) {
-      builder.pop();
-      builder.pop();
-    } else {
-      first = false;
-    }
-  }
-  stack.pop();
-  builder.push("}");
-}
-
-
-function BasicJSONSerialize(key, value, stack, builder) {
-  if (IS_SPEC_OBJECT(value)) {
-    var toJSON = value.toJSON;
-    if (IS_SPEC_FUNCTION(toJSON)) {
-      value = %_CallFunction(value, ToString(key), toJSON);
-    }
-  }
-  if (IS_STRING(value)) {
-    builder.push(value !== "" ? %QuoteJSONString(value) : '""');
-  } else if (IS_NUMBER(value)) {
-    builder.push(JSON_NUMBER_TO_STRING(value));
-  } else if (IS_BOOLEAN(value)) {
-    builder.push(value ? "true" : "false");
-  } else if (IS_NULL(value)) {
-    builder.push("null");
-  } else if (IS_SPEC_OBJECT(value) && !(typeof value == "function")) {
-    // Value is a non-callable object.
-    // Unwrap value if necessary
-    if (IS_NUMBER_WRAPPER(value)) {
-      value = ToNumber(value);
-      builder.push(JSON_NUMBER_TO_STRING(value));
-    } else if (IS_STRING_WRAPPER(value)) {
-      builder.push(%QuoteJSONString(ToString(value)));
-    } else if (IS_BOOLEAN_WRAPPER(value)) {
-      builder.push(%_ValueOf(value) ? "true" : "false");
-    } else if (IS_ARRAY(value)) {
-      BasicSerializeArray(value, stack, builder);
-    } else {
-      BasicSerializeObject(value, stack, builder);
-    }
-  }
-}
-
-
 function JSONStringify(value, replacer, space) {
   if (%_ArgumentsLength() == 1) {
-    var result = %BasicJSONStringify(value);
-    if (result != 0) return result;
-    var builder = new InternalArray();
-    BasicJSONSerialize('', value, new InternalArray(), builder);
-    if (builder.length == 0) return;
-    result = %_FastAsciiArrayJoin(builder, "");
-    if (!IS_UNDEFINED(result)) return result;
-    return %StringBuilderConcat(builder, builder.length, "");
+    return %BasicJSONStringify(value);
   }
   if (IS_OBJECT(space)) {
     // Unwrap 'space' if it is wrapped
@@ -340,6 +206,7 @@ function JSONStringify(value, replacer, space) {
   return JSONSerialize('', {'': value}, replacer, new InternalArray(), "", gap);
 }
 
+
 function SetUpJSON() {
   %CheckIsBootstrapping();
   InstallFunctions($JSON, DONT_ENUM, $Array(