hash-target.cpp File Reference

#include <cstdint>
#include <cstdlib>
#include <cstring>
#include <limits>
#include "misc_log_ex.h"
#include "crypto/hash.h"
#include "cryptonote_basic/difficulty.h"

Include dependency graph for hash-target.cpp:

Go to the source code of this file.

Functions
int	main (int argc, char *argv[])
bool	check_hash (const crypto::hash &hash, difficulty_type difficulty)

Function Documentation

check_hash()

bool cryptonote::check_hash	(	const crypto::hash &	hash,
		difficulty_type	difficulty )

Definition at line 203 of file difficulty.cpp.

                                                                      {
    if (difficulty <= max64bit) // if can convert to small difficulty - do it
      return check_hash_64(hash, difficulty.convert_to<std::uint64_t>());
    else
      return check_hash_128(hash, difficulty);
  }

Here is the caller graph for this function:

main()

int main	(	int	argc,
		char *	argv[] )

Definition at line 43 of file hash-target.cpp.

                                 {
  TRY_ENTRY();
  crypto::hash h;
  for (cryptonote::difficulty_type diff = 1;; diff += 1 + (diff >> 8)) {
    for (uint16_t b = 0; b < 256; b++) {
      memset(&h, b, sizeof(crypto::hash));
      if (check_hash(h, diff) != (b == 0 || diff <= 255 / b)) {
        return 1;
      }
      if (b > 0) {
        memset(&h, 0, sizeof(crypto::hash));
        ((char *) &h)[31] = b;
        if (check_hash(h, diff) != (diff <= 255 / b)) {
          return 2;
        }
      }
    }
    if (diff < numeric_limits<uint64_t>::max() / 256) {
      uint64_t val = 0;
      for (int i = 31; i >= 0; i--) {
        val = val * 256 + 255;
        ((char *) &h)[i] = static_cast<char>(static_cast<uint64_t>(val / diff));
        val %= (diff & 0xffffffffffffffff).convert_to<uint64_t>();
      }
      if (check_hash(h, diff) != true) {
        return 3;
      }
      if (diff > 1) {
        for (int i = 0;; i++) {
          if (i >= 32) {
            abort();
          }
          if (++((char *) &h)[i] != 0) {
            break;
          }
        }
        if (check_hash(h, diff) != false) {
          return 4;
        }
      }
    }
    if (diff + 1 + (diff >> 8) < diff) {
      break;
    }
  }
  return 0;
  CATCH_ENTRY_L0("main", 1);
}

Here is the call graph for this function: