Import of the watch repository from Pebble

third_party/jerryscript/jerry-core/vm/opcodes-ecma-arithmetics.c

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+/* Copyright 2014-2016 Samsung Electronics Co., Ltd.
+ * Copyright 2015-2016 University of Szeged.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "ecma-alloc.h"
+#include "ecma-conversion.h"
+#include "ecma-helpers.h"
+#include "ecma-number-arithmetic.h"
+#include "ecma-objects.h"
+#include "ecma-try-catch-macro.h"
+#include "opcodes.h"
+#include "jrt-libc-includes.h"
+
+/** \addtogroup vm Virtual machine
+ * @{
+ *
+ * \addtogroup vm_opcodes Opcodes
+ * @{
+ */
+
+/**
+ * Perform ECMA number arithmetic operation.
+ *
+ * The algorithm of the operation is following:
+ *   leftNum = ToNumber (leftValue);
+ *   rightNum = ToNumber (rightValue);
+ *   result = leftNum ArithmeticOp rightNum;
+ *
+ * @return ecma value
+ *         Returned value must be freed with ecma_free_value
+ */
+ecma_value_t
+do_number_arithmetic (number_arithmetic_op op, /**< number arithmetic operation */
+                      ecma_value_t left_value, /**< left value */
+                      ecma_value_t right_value) /**< right value */
+{
+  ecma_value_t ret_value = ecma_make_simple_value (ECMA_SIMPLE_VALUE_EMPTY);
+
+  ECMA_OP_TO_NUMBER_TRY_CATCH (num_left, left_value, ret_value);
+  ECMA_OP_TO_NUMBER_TRY_CATCH (num_right, right_value, ret_value);
+
+  ecma_number_t result = ECMA_NUMBER_ZERO;
+
+  switch (op)
+  {
+    case NUMBER_ARITHMETIC_SUBSTRACTION:
+    {
+      result = ecma_number_substract (num_left, num_right);
+      break;
+    }
+    case NUMBER_ARITHMETIC_MULTIPLICATION:
+    {
+      result = ecma_number_multiply (num_left, num_right);
+      break;
+    }
+    case NUMBER_ARITHMETIC_DIVISION:
+    {
+      result = ecma_number_divide (num_left, num_right);
+      break;
+    }
+    case NUMBER_ARITHMETIC_REMAINDER:
+    {
+      result = ecma_op_number_remainder (num_left, num_right);
+      break;
+    }
+  }
+
+  ret_value = ecma_make_number_value (result);
+
+  ECMA_OP_TO_NUMBER_FINALIZE (num_right);
+  ECMA_OP_TO_NUMBER_FINALIZE (num_left);
+
+  return ret_value;
+} /* do_number_arithmetic */
+
+/**
+ * 'Addition' opcode handler.
+ *
+ * See also: ECMA-262 v5, 11.6.1
+ *
+ * @return ecma value
+ *         Returned value must be freed with ecma_free_value
+ */
+ecma_value_t
+opfunc_addition (ecma_value_t left_value, /**< left value */
+                 ecma_value_t right_value) /**< right value */
+{
+  bool free_left_value = false;
+  bool free_right_value = false;
+
+  if (ecma_is_value_object (left_value))
+  {
+    ecma_object_t *obj_p = ecma_get_object_from_value (left_value);
+    left_value = ecma_op_object_default_value (obj_p, ECMA_PREFERRED_TYPE_NO);
+    free_left_value = true;
+
+    if (ECMA_IS_VALUE_ERROR (left_value))
+    {
+      return left_value;
+    }
+  }
+
+  if (ecma_is_value_object (right_value))
+  {
+    ecma_object_t *obj_p = ecma_get_object_from_value (right_value);
+    right_value = ecma_op_object_default_value (obj_p, ECMA_PREFERRED_TYPE_NO);
+    free_right_value = true;
+
+    if (ECMA_IS_VALUE_ERROR (right_value))
+    {
+      if (free_left_value)
+      {
+        ecma_free_value (left_value);
+      }
+      return right_value;
+    }
+  }
+
+  ecma_value_t ret_value = ecma_make_simple_value (ECMA_SIMPLE_VALUE_EMPTY);
+
+  if (ecma_is_value_string (left_value)
+      || ecma_is_value_string (right_value))
+  {
+    ECMA_TRY_CATCH (str_left_value, ecma_op_to_string (left_value), ret_value);
+    ECMA_TRY_CATCH (str_right_value, ecma_op_to_string (right_value), ret_value);
+
+    ecma_string_t *string1_p = ecma_get_string_from_value (str_left_value);
+    ecma_string_t *string2_p = ecma_get_string_from_value (str_right_value);
+
+    ecma_string_t *concat_str_p = ecma_concat_ecma_strings (string1_p, string2_p);
+
+    ret_value = ecma_make_string_value (concat_str_p);
+
+    ECMA_FINALIZE (str_right_value);
+    ECMA_FINALIZE (str_left_value);
+  }
+  else
+  {
+    ECMA_OP_TO_NUMBER_TRY_CATCH (num_left, left_value, ret_value);
+    ECMA_OP_TO_NUMBER_TRY_CATCH (num_right, right_value, ret_value);
+
+    ret_value = ecma_make_number_value (ecma_number_add (num_left, num_right));
+
+    ECMA_OP_TO_NUMBER_FINALIZE (num_right);
+    ECMA_OP_TO_NUMBER_FINALIZE (num_left);
+  }
+
+  if (free_left_value)
+  {
+    ecma_free_value (left_value);
+  }
+
+  if (free_right_value)
+  {
+    ecma_free_value (right_value);
+  }
+
+  return ret_value;
+} /* opfunc_addition */
+
+/**
+ * 'Unary "+"' opcode handler.
+ *
+ * See also: ECMA-262 v5, 11.4, 11.4.6
+ *
+ * @return ecma value
+ *         Returned value must be freed with ecma_free_value
+ */
+ecma_value_t
+opfunc_unary_plus (ecma_value_t left_value) /**< left value */
+{
+  ecma_value_t ret_value = ecma_make_simple_value (ECMA_SIMPLE_VALUE_EMPTY);
+
+  ECMA_OP_TO_NUMBER_TRY_CATCH (num_var_value,
+                               left_value,
+                               ret_value);
+
+  ret_value = ecma_make_number_value (num_var_value);
+
+  ECMA_OP_TO_NUMBER_FINALIZE (num_var_value);
+
+  return ret_value;
+} /* opfunc_unary_plus */
+
+/**
+ * 'Unary "-"' opcode handler.
+ *
+ * See also: ECMA-262 v5, 11.4, 11.4.7
+ *
+ * @return ecma value
+ *         Returned value must be freed with ecma_free_value
+ */
+ecma_value_t
+opfunc_unary_minus (ecma_value_t left_value) /**< left value */
+{
+  ecma_value_t ret_value = ecma_make_simple_value (ECMA_SIMPLE_VALUE_EMPTY);
+
+  ECMA_OP_TO_NUMBER_TRY_CATCH (num_var_value,
+                               left_value,
+                               ret_value);
+
+  ret_value = ecma_make_number_value (ecma_number_negate (num_var_value));
+
+  ECMA_OP_TO_NUMBER_FINALIZE (num_var_value);
+
+  return ret_value;
+} /* opfunc_unary_minus */
+
+/**
+ * @}
+ * @}
+ */