Stream.h

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/*
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 */
 
/* simple memory stream functions with buffer overflow check */
 
#pragma once
 
struct Stream {
  unsigned char *mem; /* location in memory */
  unsigned int size;  /* size */
  unsigned int pos;   /* current position */
  bool failed;        /* error occurred when seeking */
  Stream(unsigned char *m, unsigned int s) : mem(m), size(s), pos(0), failed(false)
  {
  }
  unsigned int seek(unsigned int p);
  void set_failed(const char *msg);
};
 
unsigned int mem_read(Stream &mem, unsigned long long &i);
unsigned int mem_read(Stream &mem, unsigned int &i);
unsigned int mem_read(Stream &mem, unsigned short &i);
unsigned int mem_read(Stream &mem, unsigned char &i);
unsigned int mem_read(Stream &mem, unsigned char *i, unsigned int cnt);