text: // Copyright (c) 2014-2017, The myobcoin Project
  // 
  // All rights reserved.
  // 
  // Redistribution and use in source and binary forms, with or without modification, are
  // permitted provided that the following conditions are met:
  // 
  // 1. Redistributions of source code must retain the above copyright notice, this list of
  //    conditions and the following disclaimer.
  // 
  // 2. Redistributions in binary form must reproduce the above copyright notice, this list
  //    of conditions and the following disclaimer in the documentation and/or other
  //    materials provided with the distribution.
  // 
  // 3. Neither the name of the copyright holder nor the names of its contributors may be
  //    used to endorse or promote products derived from this software without specific
  //    prior written permission.
  // 
  // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
  // EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  // MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
  // THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  // PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  // INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  // STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
  // THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  // 
  // Parts of this file are originally copyright (c) 2012-2013 The Cryptonote developers
  
  #include <stdio.h>
  #include <stdlib.h>
  #include <unistd.h>
  #include <string.h>
  #include <stdint.h>
  #include "gtest/gtest.h"
  
  // OS X, FreeBSD, and OpenBSD don't need malloc.h
  #if !defined(__APPLE__) && !defined(__FreeBSD__) && !defined(__OpenBSD__) && \
      !defined(__DragonFly__)
   #include <malloc.h>
  #endif
  
  //#define TEST_ORIGINAL
  //#define VERBOSE
  
  #ifdef TEST_ORIGINAL
  uint64_t slow_memmem_original(void* start_buff, size_t buflen,void* pat,size_t patlen)
  {
    void* buf = start_buff;
    void* end=(char*)buf+buflen-patlen;
    while((buf=memchr(buf,((char*)pat)[0],buflen)))
    {
      if(buf>end)
        return 0;
      if(memcmp(buf,pat,patlen)==0)
        return (char*)buf - (char*)start_buff;
      buf=(char*)buf+1;
    }
    return 0;
  }
  
  #define slow_memmem slow_memmem_original
  #else
  namespace cryptonote {
    uint64_t slow_memmem(const void* start_buff, size_t buflen,const void* pat,size_t patlen);
  }
  using namespace cryptonote;
  #endif
  
  static const struct {
    size_t buflen;
    const char *buf;
    size_t patlen;
    const char *pat;
    uint64_t res;
  } T[]={
    {0,"",0,"",0},
    {1,"",0,"",0},
    {0,"",1,"",0},
    {1,"x",1,"x",0},
    {2,"x",1,"",1},
    {1,"x",1,"",0},
    {1,"x",2,"",0},
    {1,"x",2,"x",0},
    {2,"ax",2,"x",0},
    {1,"xx",2,"xx",0},
    {4,"abcd",3,"abc",0},
    {4,"abcd",3,"bcd",1},
    {4,"abcd",4,"abcd",0},
    {4,"abcd",1,"d",3},
    {4,"abcd",1,"c",2},
    {4,"abcd",1,"bc",1},
    {4,"abcd",1,"",0},
    {3,"abcd",1,"d",0},
    {5,"aaaab",2,"ab",3},
    {7,"aaaabab",2,"ab",3},
    {7,"aaaabab",3,"abc",0},
    {4,"abcd",2,"cd",2},
    {3,"abcd",2,"cd",0},
    {3,"a\0b",1,"",1},
    {3,"a\0b",2,"\0b",1},
    {8,"xxxxxxab",3,"xyz",0},
    {8,"xxxxxxab",6,"abcdef",0},
    {9,"\0xxxxxab",3,"ab",6},
    {4,"\0\0a",3,"\0a",1},
  };
  
  TEST(slowmem,Success)
  {
    size_t n;
    for (n=0;n<sizeof(T)/sizeof(T[0]);++n) {
  #ifdef VERBOSE
      printf("%3zu: ",n);
      fflush(stdout);
  #endif
      void *buf=malloc(T[n].buflen);
      memcpy(buf,T[n].buf,T[n].buflen);
      void *pat=malloc(T[n].patlen);
      memcpy(pat,T[n].pat,T[n].patlen);
      uint64_t res=slow_memmem(buf,T[n].buflen,pat,T[n].patlen);
      free(pat);
      free(buf);
      ASSERT_EQ(res,T[n].res);
  ASSERT_EQ(1,1);
  #ifdef VERBOSE
      if (res!=T[n].res) printf("failed (got %zu, expected %zu)",res,T[n].res); else printf("ok");
      printf("\n");
  #endif
    }
  }
  