vala/valaintegerliteral.vala

   1 /* valaintegerliteral.vala
   2  *
   3  * Copyright (C) 2006-2007  Jürg Billeter
   4  *
   5  * This library is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Lesser General Public
   7  * License as published by the Free Software Foundation; either
   8  * version 2 of the License, or (at your option) any later version.
   9
  10  * This library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Lesser General Public License for more details.
  14
  15  * You should have received a copy of the GNU Lesser General Public
  16  * License along with this library; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301  USA
  18  *
  19  * Author:
  20  *      Jürg Billeter <j@bitron.ch>
  21  */
  22
  23 using GLib;
  24
  25 /**
  26  * Represents an integer literal in the source code.
  27  */
  28 public class Vala.IntegerLiteral : Literal {
  29         /**
  30          * The literal value.
  31          */
  32         public string! value { get; set; }
  33
  34         /**
  35          * Creates a new integer literal.
  36          *
  37          * @param i      literal value
  38          * @param source reference to source code
  39          * @return       newly created integer literal
  40          */
  41         public IntegerLiteral (string! i, SourceReference source = null) {
  42                 value = i;
  43                 source_reference = source;
  44         }
  45
  46         public override void accept (CodeVisitor! visitor) {
  47                 visitor.visit_integer_literal (this);
  48         }
  49
  50         public override string! to_string () {
  51                 return value;
  52         }
  53
  54         /**
  55          * Returns the type name of the value this literal represents.
  56          *
  57          * @return the name of literal type
  58          */
  59         public string! get_type_name () {
  60                 string number = value;
  61
  62                 int l = 0;
  63                 while (number.has_suffix ("L")) {
  64                         l++;
  65                         number = number.ndup (number.size () - 1);
  66                 }
  67
  68                 bool u = false;
  69                 if (number.has_suffix ("U")) {
  70                         u = true;
  71                         number = number.ndup (number.size () - 1);
  72                 }
  73
  74                 int64 n = number.to_int64 ();
  75                 if (!u && n > 0x7fffffff) {
  76                         // value doesn't fit into signed 32-bit
  77                         l = 2;
  78                 } else if (u && n > 0xffffffff) {
  79                         // value doesn't fit into unsigned 32-bit
  80                         l = 2;
  81                 }
  82
  83                 if (l == 0) {
  84                         if (u) {
  85                                 return "uint";
  86                         } else {
  87                                 return "int";
  88                         }
  89                 } else if (l == 1) {
  90                         if (u) {
  91                                 return "ulong";
  92                         } else {
  93                                 return "long";
  94                         }
  95                 } else {
  96                         if (u) {
  97                                 return "uint64";
  98                         } else {
  99                                 return "int64";
 100                         }
 101                 }
 102         }
 103 }