text: /**
   * Equihash solver interface for ccminer (compatible with linux and windows)
   * Solver taken from nheqminer, by djeZo (and NiceHash)
   * tpruvot - 2017 (GPL v3)
   */
  #include <stdio.h>
  #include <unistd.h>
  #include <assert.h>
  #include <string.h>
  #include <stdlib.h>
  #include <stdexcept>
  #include <vector>
  
  #include <sph/sph_sha2.h>
  
  //#include "eqcuda.hpp"
  //#include "equihash.h" // equi_verify()
  
  #include <miner.h>
  extern "C"
  {
  #include "haraka.h"
  }
  
  // input here is 140 for the header and 1344 for the solution (equi.cpp)
  
  
  #include <cuda_helper.h>
  
  #define EQNONCE_OFFSET 30 /* 27:34 */
  #define NONCE_OFT EQNONCE_OFFSET
  
  static bool init[MAX_GPUS] = { 0 };
  static int valid_sols[MAX_GPUS] = { 0 };
  static uint8_t _ALIGN(64) data_sols[MAX_GPUS][10][1536] = { 0 }; // 140+3+1344 required
  static __thread uint32_t throughput = 0;
  extern void verus_hash(int thr_id, uint32_t threads, uint32_t startNonce, uint32_t* resNonces);
  extern void verus_setBlock(void *blockf,const void *pTargetIn);
  extern void verus_init(int thr_id);
  
  #ifndef htobe32
  #define htobe32(x) swab32(x)
  #endif
  
  extern "C" void VerusHashHalf(void *result, const void *data, size_t len)
  {
      unsigned char buf[128];
      unsigned char *bufPtr = buf;
      int pos = 0, nextOffset = 64;
      unsigned char *bufPtr2 = bufPtr + nextOffset;
      unsigned char *ptr = (unsigned char *)data;
      uint32_t count = 0;
  
      // put our last result or zero at beginning of buffer each time
      memset(bufPtr, 0, 32);
  
      // digest up to 32 bytes at a time
      for ( ; pos < len; pos += 32)
      {
          if (len - pos >= 32)
          {
              memcpy(bufPtr + 32, ptr + pos, 32);
          }
          else
          {
              int i = (int)(len - pos);
              memcpy(bufPtr + 32, ptr + pos, i);
              memset(bufPtr + 32 + i, 0, 32 - i);
          }
  
          count++;
  
          if (count == 47) break; // exit from cycle before last iteration
  
          //printf("[%02d.1] ", count); for (int z=0; z<64; z++) printf("%02x", bufPtr[z]); printf("\n");
          haraka512_zero(bufPtr2, bufPtr); // ( out, in)
          bufPtr2 = bufPtr;
          bufPtr += nextOffset;
          //printf("[%02d.2] ", count); for (int z=0; z<64; z++) printf("%02x", bufPtr[z]); printf("\n");
  
  
          nextOffset *= -1;
      }
      memcpy(result, bufPtr, 32);
  };
  
  static void cb_hashdone(int thr_id) {
  	if (!valid_sols[thr_id]) valid_sols[thr_id] = -1;
  }
  static bool cb_cancel(int thr_id) {
  	if (work_restart[thr_id].restart)
  		valid_sols[thr_id] = -1;
  	return work_restart[thr_id].restart;
  }
  
  extern "C" int scanhash_verus(int thr_id, struct work *work, uint32_t max_nonce, unsigned long *hashes_done)
  {
  	uint32_t _ALIGN(64) endiandata[35];
  	uint32_t *pdata = work->data;
  	uint32_t *ptarget = work->target;
      int dev_id = device_map[thr_id];
  	
  	struct timeval tv_start, tv_end, diff;
  	double secs, solps;
  	
      uint8_t blockhash_half[64];
  	uint32_t nonce_buf = 0;
  	
      unsigned char block_41970[] = {0xfd, 0x40, 0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; // solution
  	uint8_t _ALIGN(64) full_data[140+3+1344] = { 0 };
      uint8_t* sol_data = &full_data[140];
  	uint32_t intensity = 27;
  	
  	throughput = cuda_default_throughput(thr_id, 1U << intensity);
  	if (init[thr_id]) throughput = min(throughput, max_nonce - nonce_buf);
  	memcpy(endiandata, pdata, 140);
      memcpy(&data_sols[thr_id][0][140], block_41970, 1344);
      memcpy(full_data, endiandata, 140);
  	memcpy(sol_data, &data_sols[thr_id][0][140], 1347);
  	if (!init[thr_id])
  	{
  		cudaSetDevice(dev_id);
  		if (opt_cudaschedule == -1 && gpu_threads == 1) {
  			cudaDeviceReset();
  			// reduce cpu usage
  			cudaSetDeviceFlags(cudaDeviceScheduleBlockingSync);
  			CUDA_LOG_ERROR();
  		}
  		cuda_get_arch(thr_id);
  		gpulog(LOG_INFO, thr_id, "Intensity set to %g, %u cuda threads", throughput2intensity(throughput), throughput);
  		verus_init(thr_id);
  		init[thr_id] = true;
  	}
  	
     
  	VerusHashHalf(blockhash_half, full_data, 1487); // full VerusHash without last iteration
  	
  	gettimeofday(&tv_start, NULL);  //get millisecond timer val for cal of h
  	
  	work->valid_nonces = 0;
          
  	verus_setBlock(blockhash_half,work->target); //set data to gpu kernel
          
          
  	do {
  		
              *hashes_done = nonce_buf + throughput;
  			//*hashes_done = mainnonce;
  			//printf("firstnoncef= %08x, maxnonce = %08x,throughput = %08x\n",first_nonce,max_nonce, throughput);
              verus_hash(thr_id, throughput, nonce_buf , work->nonces);
  			
  			if (work->nonces[0] != UINT32_MAX )
  		   {
  				const uint32_t Htarg = ptarget[7];
  				uint32_t _ALIGN(64) vhash[8];
  				
                  *((uint32_t *)full_data + 368) = work->nonces[0];
                  //*((uint32_t *)full_data + 369) = 0x4b434544; // DECK
                  //*((uint32_t *)full_data + 370) = 0x00005245; // ER
                          
                  memset(blockhash_half + 32, 0x0, 32);
                  memcpy(blockhash_half + 32, full_data + 1486 - 14, 15);
  				//printf("blockhash half\n");
  				for (int i = 0; i < 32; i++) printf("", blockhash_half[i]);
  				//printf("\n");       
                  haraka512((unsigned char*)vhash, (unsigned char*)blockhash_half);
  				//printf("full hash \n");
  				for (int i = 0; i < 32; i++) printf("",((uint8_t*)(&vhash))[i]);
  				//printf("\n");
  				
  				
  				if (vhash[7] <= Htarg && fulltest(vhash, ptarget))
  					{
  					
  					    work->valid_nonces++;
  					
                          memcpy(work->data, endiandata, 140);
                          int nonce = work->valid_nonces-1;
                          memcpy(work->extra, sol_data, 1347);
                          bn_store_hash_target_ratio(vhash, work->target, work, nonce);
                                      
  						work->nonces[work->valid_nonces - 1] = endiandata[NONCE_OFT];
                          pdata[NONCE_OFT] = endiandata[NONCE_OFT] + 1;
  
  						
                          goto out; 
  					}
  						
  			}
  			if ((uint64_t)throughput + nonce_buf >= max_nonce) {
  				
  				break;
  			}
  		nonce_buf += throughput;
  
  	} while (!work_restart[thr_id].restart);
          
          
  out:
  	gettimeofday(&tv_end, NULL);
  	timeval_subtract(&diff, &tv_end, &tv_start);
  	secs = (1.0 * diff.tv_sec) + (0.000001 * diff.tv_usec);
  	solps = (double)nonce_buf / secs;
  	gpulog(LOG_INFO, thr_id, "%d hashes in %.2f s (%.2f MH/s)", nonce_buf, secs, solps / 1000000);
  
  	// H/s
  	
  	//*hashes_done = first_nonce;
  	pdata[NONCE_OFT] = endiandata[NONCE_OFT] + 1;
  
  	return work->valid_nonces;
  }
  
  // cleanup
  void free_verushash(int thr_id)
  {
  	if (!init[thr_id])
  		return;
  
  	
  
  	init[thr_id] = false;
  }
  
  
  