Move helpers from ecma-helpers-char.cpp to lit-char-helpers.cpp, rename them correspondingly.

JerryScript-DCO-1.0-Signed-off-by: Ruben Ayrapetyan r.ayrapetyan@samsung.com
2015-06-30 21:17:01 +03:00
parent 017aa6b684
commit c37964f7a9
6 changed files with 66 additions and 55 deletions
@@ -0,0 +1,114 @@
+/* Copyright 2015 Samsung Electronics Co., Ltd.
+ *
+ * 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 "lit-char-helpers.h"
+
+/**
+ * Check if specified character is the newline character
+ *
+ * @return true - if the character is "<LF>" character according to ECMA-262 v5, Table 3,
+ *         false - otherwise.
+ */
+bool
+lit_char_is_new_line (ecma_char_t c) /**< code unit */
+{
+  return (c == '\x0A');
+} /* lit_char_is_new_line */
+
+/**
+ * Check if specified character the carriage return character
+ *
+ * @return true - if the character is "<CR>" character according to ECMA-262 v5, Table 3,
+ *         false - otherwise.
+ */
+bool
+lit_char_is_carriage_return (ecma_char_t c) /**< code unit */
+{
+  return (c == '\x0D');
+} /* lit_char_is_carriage_return */
+
+/**
+ * Check if specified character is one of LineTerminator (ECMA-262 v5, Table 3) characters
+ *
+ * @return true - if the character is one of LineTerminator characters,
+ *         false - otherwise.
+ */
+bool
+lit_char_is_line_terminator (ecma_char_t c) /**< code unit */
+{
+  /* FIXME: Handle <LS> and <PS> (ECMA-262 v5, 7.3, Table 3) when Unicode would be supported */
+
+  return (lit_char_is_carriage_return (c)
+          || lit_char_is_new_line (c));
+} /* lit_char_is_line_terminator */
+
+/**
+ * Check if specified character is a word character (part of IsWordChar abstract operation)
+ *
+ * See also: ECMA-262 v5, 15.10.2.6 (IsWordChar)
+ *
+ * @return true - if the character is a word character
+ *         false - otherwise.
+ */
+bool
+lit_char_is_word_char (ecma_char_t c) /**< code unit */
+{
+  if ((c >= 'a' && c <= 'z')
+      || (c >= 'A' && c <= 'Z')
+      || (c >= '0' && c <= '9')
+      || c == '_')
+  {
+    return true;
+  }
+
+  return false;
+} /* lit_char_is_word_char */
+
+/**
+ * Convert a hex character to an unsigned integer
+ *
+ * @return digit value, corresponding to the hex char
+ */
+uint32_t
+lit_char_hex_to_int (ecma_char_t c) /**< code unit, corresponding to
+                                     *    one of [0-9A-Fa-f] characters */
+{
+  switch (c)
+  {
+    case '0': return 0x0;
+    case '1': return 0x1;
+    case '2': return 0x2;
+    case '3': return 0x3;
+    case '4': return 0x4;
+    case '5': return 0x5;
+    case '6': return 0x6;
+    case '7': return 0x7;
+    case '8': return 0x8;
+    case '9': return 0x9;
+    case 'a':
+    case 'A': return 0xA;
+    case 'b':
+    case 'B': return 0xB;
+    case 'c':
+    case 'C': return 0xC;
+    case 'd':
+    case 'D': return 0xD;
+    case 'e':
+    case 'E': return 0xE;
+    case 'f':
+    case 'F': return 0xF;
+    default: JERRY_UNREACHABLE ();
+  }
+} /* lit_char_hex_to_int */