Implement parseInt()

JerryScript-DCO-1.0-Signed-off-by: Dániel Bátyai dbatyai.u-szeged@partner.samsung.com

Author: dbatyai

jerry-core/ecma/builtin-objects/ecma-builtin-global.cpp

@@ -23,6 +23,7 @@
 #include "ecma-try-catch-macro.h"
 #include "jrt.h"
 #include "vm.h"
+#include "jrt-libc-includes.h"
 
 #define ECMA_BUILTINS_INTERNAL
 #include "ecma-builtins-internal.h"
@@ -97,11 +98,160 @@ ecma_builtin_global_object_eval (ecma_value_t this_arg, /**< this argument */
  *         Returned value must be freed with ecma_free_completion_value.
  */
 static ecma_completion_value_t
-ecma_builtin_global_object_parse_int (ecma_value_t this_arg, /**< this argument */
+ecma_builtin_global_object_parse_int (ecma_value_t this_arg __attr_unused___, /**< this argument */
                                       ecma_value_t string, /**< routine's first argument */
                                       ecma_value_t radix) /**< routine's second argument */
 {
-  ECMA_BUILTIN_CP_UNIMPLEMENTED (this_arg, string, radix);
+  ecma_completion_value_t ret_value = ecma_make_empty_completion_value ();
+
+  /* 1. */
+  ECMA_TRY_CATCH (string_var, ecma_op_to_string (string), ret_value);
+
+  ecma_string_t *number_str_p = ecma_get_string_from_value (string_var);
+  int32_t string_len = ecma_string_get_length (number_str_p);
+
+  MEM_DEFINE_LOCAL_ARRAY (zt_string_buff, string_len + 1, ecma_char_t);
+
+  size_t string_buf_size = (size_t) (string_len + 1) * sizeof (ecma_char_t);
+  ssize_t bytes_copied = ecma_string_to_zt_string (number_str_p,
+                                                   zt_string_buff,
+                                                   (ssize_t) string_buf_size);
+  JERRY_ASSERT (bytes_copied > 0);
+
+  /* 2. Remove leading whitespace. */
+  int32_t start = string_len;
+  int32_t end = string_len;
+  for (int i = 0; i < end; i++)
+  {
+    if (!(isspace (zt_string_buff[i])))
+    {
+      start = i;
+      break;
+    }
+  }
+
+  /* 3. */
+  int sign = 1;
+
+  /* 4. */
+  if (zt_string_buff[start] == '-')
+  {
+    sign = -1;
+  }
+
+  /* 5. */
+  if (zt_string_buff[start] == '-' || zt_string_buff[start] == '+')
+  {
+    start++;
+  }
+
+  /* 6. */
+  ECMA_OP_TO_NUMBER_TRY_CATCH (radix_num, radix, ret_value);
+  int32_t rad = ecma_number_to_int32 (radix_num);
+
+  /* 7.*/
+  bool strip_prefix = true;
+
+  /* 8. */
+  if (rad != 0)
+  {
+    /* 8.a */
+    if (rad < 2 || rad > 36)
+    {
+      ecma_number_t *ret_num_p = ecma_alloc_number ();
+      *ret_num_p = ecma_number_make_nan ();
+      ret_value = ecma_make_normal_completion_value (ecma_make_number_value (ret_num_p));
+    }
+    /* 8.b */
+    else if (rad != 16)
+    {
+      strip_prefix = false;
+    }
+  }
+  /* 9. */
+  else
+  {
+    rad = 10;
+  }
+
+  if (ecma_is_completion_value_empty (ret_value))
+  {
+    /* 10. */
+    if (strip_prefix)
+    {
+      if (end - start >= 2
+          && zt_string_buff[start] == '0'
+          && (zt_string_buff[start + 1] == 'x' || zt_string_buff[start + 1] == 'X'))
+      {
+        start += 2;
+
+        rad = 16;
+      }
+    }
+
+    /* 11. Check if characters are in [0, Radix - 1]. We also convert them to number values in the process. */
+    for (int i = start; i < end; i++)
+    {
+      if ((zt_string_buff[i]) >= 'a' && zt_string_buff[i] <= 'z')
+      {
+        zt_string_buff[i] = (ecma_char_t) (zt_string_buff[i] - 'a' + 10);
+      }
+      else if (zt_string_buff[i] >= 'A' && zt_string_buff[i] <= 'Z')
+      {
+        zt_string_buff[i] = (ecma_char_t) (zt_string_buff[i] - 'A' + 10);
+      }
+      else if (isdigit (zt_string_buff[i]))
+      {
+        zt_string_buff[i] = (ecma_char_t) (zt_string_buff[i] - '0');
+      }
+      else
+      {
+        /* Not a valid number char, set value to radix so it fails to pass as a valid character. */
+        zt_string_buff[i] = (ecma_char_t) rad;
+      }
+
+      if (!(zt_string_buff[i] < rad))
+      {
+        end = i;
+        break;
+      }
+    }
+
+    /* 12. */
+    if (end - start == 0)
+    {
+      ecma_number_t *ret_num_p = ecma_alloc_number ();
+      *ret_num_p = ecma_number_make_nan ();
+      ret_value = ecma_make_normal_completion_value (ecma_make_number_value (ret_num_p));
+    }
+  }
+
+  if (ecma_is_completion_value_empty (ret_value))
+  {
+    ecma_number_t *value_p = ecma_alloc_number ();
+    *value_p = 0;
+    ecma_number_t multiplier = 1.0f;
+
+    /* 13. and 14. */
+    for (int i = end - 1; i >= start; i--)
+    {
+      *value_p += (ecma_number_t) zt_string_buff[i] * multiplier;
+      multiplier *= (ecma_number_t) rad;
+    }
+
+    /* 15. */
+    if (sign < 0)
+    {
+      *value_p *= (ecma_number_t) sign;
+    }
+
+    ret_value = ecma_make_normal_completion_value (ecma_make_number_value (value_p));
+  }
+
+  ECMA_OP_TO_NUMBER_FINALIZE (radix_num);
+  MEM_FINALIZE_LOCAL_ARRAY (zt_string_buff);
+  ECMA_FINALIZE (string_var);
+  return ret_value;
 } /* ecma_builtin_global_object_parse_int */
 
 /**

tests/jerry/global-parseint.js

@@ -0,0 +1,69 @@
+// Copyright 2015 Samsung Electronics Co., Ltd.
+// Copyright 2015 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.
+
+assert(parseInt("123") === 123);
+assert(parseInt("+123") === 123);
+assert(parseInt("-123") === -123);
+assert(parseInt("0123") === 123);
+assert(parseInt("  123") === 123);
+assert(parseInt(" \n  123") === 123);
+assert(parseInt(" \n  123  \t") === 123);
+assert(parseInt("0x123") === 291);
+assert(parseInt("0X123") === 291);
+assert(parseInt("123", 4) === 27);
+assert(parseInt("ABC", 16) === 2748);
+assert(parseInt("12A3") === 12);
+assert(parseInt("12.34") === 12);
+assert(isNaN(parseInt("AB")));
+
+var bool = true;
+var obj = new Object();
+var num = 8;
+var arr = [2,3,4];
+var undef;
+
+assert(isNaN(parseInt(bool, bool)));
+assert(isNaN(parseInt(bool, obj)));
+assert(isNaN(parseInt(bool, num)));
+assert(isNaN(parseInt(bool, arr)));
+
+assert(isNaN(parseInt(obj, bool)));
+assert(isNaN(parseInt(obj, obj)));
+assert(isNaN(parseInt(obj, num)));
+assert(isNaN(parseInt(obj, arr)));
+
+assert(isNaN(parseInt(num, bool)));
+assert(parseInt(num, obj) === 8);
+assert(isNaN(parseInt(num, num)));
+assert(parseInt(num, arr) === 8);
+
+assert(isNaN(parseInt(arr, bool)));
+assert(parseInt(arr, obj) === 2);
+assert(parseInt(arr, num) === 2);
+assert(parseInt(arr, arr) === 2);
+
+assert(isNaN(parseInt(undef, bool)));
+assert(isNaN(parseInt(undef, obj)));
+assert(isNaN(parseInt(undef, num)));
+assert(isNaN(parseInt(undef, arr)));
+
+var obj = { toString : function () { throw new ReferenceError("foo") } };
+try {
+	parseInt(obj);
+	assert(false);
+} catch (e) {
+	assert(e instanceof ReferenceError);
+	assert(e.message === "foo");
+}