File indexing completed on 2024-05-12 05:43:27

 /*
     Copyright (C) 2015 Volker Krause <vkrause@kde.org>
 
     This program is free software; you can redistribute it and/or modify it
     under the terms of the GNU Library General Public License as published by
     the Free Software Foundation; either version 2 of the License, or (at your
     option) any later version.
 
     This program is distributed in the hope that it will be useful, but WITHOUT
     ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
     FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Library General Public
     License for more details.
 
     You should have received a copy of the GNU General Public License
     along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */
 
 #include "dwarfleb128.h"
 
 namespace DwarfLEB128 {
 
 // see https://en.wikipedia.org/wiki/LEB128
 
 uint64_t decodeUnsigned(const char* data, int* size)
 {
     const auto begin = data;
     uint64_t result = 0;
     unsigned int shift = 0;
     uint8_t currentByte = 0;
 
     do {
         currentByte = *data++;
         result |= uint64_t(currentByte & 0x7f) << shift;
         shift += 7;
     } while (currentByte & 0x80);
 
     if (size)
         *size = data - begin;
 
     return result;
 }
 
 int64_t decodeSigned(const char* data, int* size)
 {
     const auto begin = data;
     int64_t result = 0;
     unsigned int shift = 0;
     uint8_t currentByte = 0;
 
     do {
         currentByte = *data++;
         result |= ((currentByte & 0x7f) << shift);
         shift += 7;
     } while (currentByte & 0x80);
 
     if (currentByte & 0x40)
         result |= uint64_t(-1) << shift;
 
     if (size)
         *size = data - begin;
 
     return result;
 }
 
 }