#if defined IMPL_STL
  #include <string>
  #include <iostream>
  #include <cstdio>
  using namespace std;
  #define IMPL_CXX

#elif defined IMPL_CFA_HL_SHARE
  #define IMPL_CFA_HL
  #define IMPL_CFA

#elif defined IMPL_CFA_LL_SHARE
  #define IMPL_CFA_LL
  #define IMPL_CFA

#elif defined IMPL_CFA_HL_NOSHARE
  #define IMPL_CFA_HL
  #define CFA_NOSHARE
  #define IMPL_CFA

#elif defined IMPL_CFA_LL_NOSHARE
  #define IMPL_CFA_LL
  #define CFA_NOSHARE
  #define IMPL_CFA

#elif defined IMPL_BUHR94
  #include <iostream>
  #include <cstdio>
  #include "/u0/mlbrooks/usys1/sm/string/StringSharing/src/string.h"
  #define IMPL_CXX

#else
  #error Bad IMPL_
#endif


#if defined IMPL_CFA_HL
  #include <string.hfa>
#elif defined IMPL_CFA_LL
  #include <string_res.hfa>
#endif

#if defined CFA_NOSHARE
  #include <string_sharectx.hfa>
  #define STRING_SHARING_CONTROL \
    string_sharectx c = { NO_SHARING };
#else 
  #define STRING_SHARING_CONTROL
#endif

#if defined IMPL_CFA
  #include <math.hfa>
#elif defined IMPL_CXX
  #include <algorithm>
  using std::min;
#endif

#include <time.h>
#include <stdlib.h> // atoi
#include <string.h> // strlen, only during setup

#if defined IMPL_STL || defined IMPL_BUHR94
    #define PRINT(s) std::cout << s << std::endl
#elif defined IMPL_CFA_HL || defined IMPL_CFA_LL
    #define PRINT(s) sout | s;
#else
    #error Unhandled print case
#endif

double meanLen(int N, char ** strings) {
    int totalLen = 0;
    for (int i = 0 ; i < N; i ++) {
        totalLen += strlen(strings[i]);
    }
    return (double)totalLen / (double)N;
}

volatile int checkthis = 0;
#define MAYBE( op ) if (checkthis) { op; }

int main( int argc, char ** argv ) {

    STRING_SHARING_CONTROL


    const char * usage_args = "ConcatsPerReset ExecTimeSecs Corpus...";
    const int static_arg_posns = 3;

    int concatsPerReset = -1, execTimeSecs = -1;

    switch (min(argc, static_arg_posns)) {
      case 3: execTimeSecs = atoi(argv[2]);
      case 2: concatsPerReset = atoi(argv[1]);
    }

    int corpuslen = argc - static_arg_posns;
    char ** corpus = argv + static_arg_posns;

    if (execTimeSecs < 1 || concatsPerReset < 1 || corpuslen < 1) {
      printf("usage: %s %s\n", argv[0], usage_args);
      printf("output:\nconcatsPerReset,corpusItemCount,corpusMeanLenChars,concatDoneActualCount,execTimeActualSec\n");
      exit(1);
    }

    double meanCorpusLen = meanLen(corpuslen, corpus);

    clock_t start, end_target, end_actual;

    #if defined IMPL_CFA_LL
        string_res x = "starter";
        string_res y;
      #if defined OP_PLUS_THEN_ASSIGN
        string_res z;
      #endif
        #define RESET y = x;
    #else
        string x = "starter";
        string y;
        #define RESET y = x;
    #endif

    start = clock();
    end_target = start + CLOCKS_PER_SEC * execTimeSecs;
    volatile unsigned int t = 0;
    for ( ; t % 100 != 0 || clock() < end_target ; t += 1 ) {
            RESET
            for ( volatile unsigned int i = 0; i < concatsPerReset; i += 1 ) {
              MAYBE( PRINT(y) )
              char *toAppend = corpus[i % corpuslen]; // ? corpus[rand() % corpuslen]
              #if defined OP_PLUS_THEN_ASSIGN && defined IMPL_CFA_LL
                 z = y;
                 z += toAppend;
                 y = z;
              #elif defined OP_PLUS_THEN_ASSIGN
                 y = y + toAppend;
              #elif defined OP_PLUSEQ
                 y += toAppend;
              #endif
            }
    }
    end_actual = clock();
    unsigned int concatsDone = t * concatsPerReset;
    double elapsed = ((double) (end_actual - start)) / CLOCKS_PER_SEC;
    printf("%d,%d,%f,%d,%f\n", concatsPerReset, corpuslen, meanCorpusLen, concatsDone, elapsed);

    return 0;
}