_ Git - BearSSL/blob - T0/CodeElementUIntExpr.cs

   1 /*
   2  * Copyright (c) 2016 Thomas Pornin <pornin@bolet.org>
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining
   5  * a copy of this software and associated documentation files (the
   6  * "Software"), to deal in the Software without restriction, including
   7  * without limitation the rights to use, copy, modify, merge, publish,
   8  * distribute, sublicense, and/or sell copies of the Software, and to
   9  * permit persons to whom the Software is furnished to do so, subject to
  10  * the following conditions:
  11  *
  12  * The above copyright notice and this permission notice shall be
  13  * included in all copies or substantial portions of the Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  16  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  17  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  18  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  19  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  20  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  21  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  22  * SOFTWARE.
  23  */
  24
  25 using System;
  26
  27 class CodeElementUIntExpr : CodeElement {
  28
  29         uint val;
  30         TPointerExpr cx;
  31         int off;
  32
  33         internal CodeElementUIntExpr(uint val,
  34                 TPointerExpr cx, int off) : base()
  35         {
  36                 this.val = val;
  37                 this.cx = cx;
  38                 this.off = off;
  39         }
  40
  41         /* obsolete
  42         internal override int Length {
  43                 get {
  44                         return Encode7EUnsigned(val, null)
  45                                 + (cx.GetMaxBitLength(off) + 6) / 7;
  46                 }
  47         }
  48         */
  49
  50         internal override int GetLength(bool oneByteCode)
  51         {
  52                 int len = oneByteCode ? 1 : Encode7EUnsigned(val, null);
  53                 return len + (cx.GetMaxBitLength(off) + 6) / 7;
  54         }
  55
  56         internal override int Encode(BlobWriter bw, bool oneByteCode)
  57         {
  58                 int len1 = oneByteCode
  59                         ? EncodeOneByte(val, bw)
  60                         : Encode7EUnsigned(val, bw);
  61                 int len2 = (cx.GetMaxBitLength(off) + 6) / 7;
  62                 bw.Append(String.Format("T0_INT{0}({1})",
  63                         len2, cx.ToCExpr(off)));
  64                 return len1 + len2;
  65         }
  66 }