#if defined IMPL_STL_NA_NA
  #define IMPL_STL
#endif

#if defined IMPL_BUHR94_NA_NA
  #define IMPL_BUHR94
#endif

#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>
  extern "C" {
    void malloc_stats( void );
  }
#elif defined IMPL_CXX
  #include <algorithm>
  using std::min;
  #include <malloc.h>
#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

#if defined IMPL_CFA_LL
    #define STRING_T string_res
    #define ASSIGN_CHAR(str, idx, val) assignAt(str, idx, val)
#else
    #define STRING_T string
    #define ASSIGN_CHAR(str, idx, val) str[idx] = val
#endif

#if defined IMPL_CFA
    #define LEN(str) size(str)
#elif defined IMPL_STL 
    #define LEN(str) str.length()
#else
    #error need LEN definition for this IMPL_
#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; }

// setup, not being timed, nor judged for aesthetics
void makeSuperCorpus( STRING_T & target, int corpusLen, char ** corpus, int scSize, char scDelimiter ) {
    char delimiterStr[2] = { scDelimiter, '\0' };
    for ( int i = 0;  i < scSize; i++ ) {
        target += corpus[ i % corpusLen ];
        target += delimiterStr;
    }
}

// the function at issue

#if defined IMPL_CFA_HL
void processThing( string & thing, char magicChar ) {
    MAYBE(PRINT(thing));
    size_t foundPos;
    for (;;) {
        size_t size_thing = size(thing);
        foundPos = find(thing, magicChar);
        if( foundPos == size_thing ) break;
        string mcOccur = thing(foundPos, foundPos+1)`shareEdits;
        mcOccur = "";
    }
    return thing;
}

#elif defined IMPL_CFA_LL
void processThing( string_res & thing, char magicChar ) {
    MAYBE(PRINT(thing));
    size_t foundPos;
    for (;;) {
        size_t size_thing = size(thing);
        foundPos = find(thing, magicChar);
        if( foundPos == size_thing ) break;
        string_res mcOccur = { thing, SHARE_EDITS, foundPos, foundPos+1 };
        mcOccur = "";
    }
}

#elif defined IMPL_STL
void processThing( string & thing, char magicChar ) {
    MAYBE(PRINT(thing));
    size_t foundPos;
    for (;;) {
        size_t size_thing = thing.length();
        foundPos = thing.find(magicChar);
        if (foundPos == string::npos) break;
        thing.erase(foundPos, 1);
    }
}

#endif

/*
void runCorrectnessDemo(char** corpus, int corpusLen) {
    STRING_T item = "asdf";    PRINT( processThing( item, '-' ) );
    item = "as-df";            PRINT( processThing( item, '-' ) );
    item = "-asdf-";           PRINT( processThing( item, '-' ) );
    item = "-";                PRINT( processThing( item, '-' ) );
    for ( int i = 0; i < corpusLen; i ++ ) {
        item = corpus[i];      PRINT( processThing( item, '-' ) );
    }

    STRING_T supercorpus;
    makeSuperCorpus( supercorpus, corpusLen, corpus, 30, ',');
    PRINT( supercorpus );
}
*/

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

    STRING_SHARING_CONTROL

    int corpuslen = 0;
    char ** corpus = (char**) 0;

    clock_t start, endTarget, end_actual;

    const char * usage_args = "SCsize MagicChar ExecTimeSecs Corpus...";
    const int static_arg_posns = 4;

    int scSize = -1;
    char magicChar = '\0';
    int execTimeSecs = -1;

    switch (min(argc, static_arg_posns)) {
      case 4: execTimeSecs = atoi(argv[3]);
      case 3: magicChar = argv[2][0];
      case 2: scSize = atoi(argv[1]);
    }

    corpuslen = argc - static_arg_posns;
    corpus = argv + static_arg_posns;

    if (scSize < 1 || magicChar == '\0' || execTimeSecs < 1 || corpuslen < 1) {
      printf("usage: %s %s\n", argv[0], usage_args);
      printf("output:\nxxx,corpusItemCount,corpusMeanLenChars,invcationCountActual,execTimeActualSec\n");
      exit(1);
    }

    double meanCorpusLen = meanLen(corpuslen, corpus);

//    runCorrectnessDemo(corpus, corpuslen);


    STRING_T supercorpus;
    makeSuperCorpus( supercorpus, corpuslen, corpus, scSize, ',');

    size_t sc_charlen = LEN(supercorpus);

    start = clock();
    endTarget = start + CLOCKS_PER_SEC * execTimeSecs;

    volatile unsigned int t = 0;
    size_t lastChunkEnd = -1;
    for ( ; t % 10000 != 0 || clock() < endTarget ; t += 1 ) {
            #if defined OP_PNO

                lastChunkEnd++;
                if ( lastChunkEnd >= sc_charlen ) {
                    lastChunkEnd = 0;
                }

#if defined IMPL_CFA_HL
                size_t thisChunkEnd = findFrom( supercorpus, lastChunkEnd, ',' );
                //if (thisChunkEnd == string::npos) throw 1;
                string chunkProcessed = supercorpus(lastChunkEnd, thisChunkEnd);
                processThing(chunkProcessed, '-');
#elif defined IMPL_CFA_LL
                size_t thisChunkEnd = findFrom( supercorpus, lastChunkEnd, ',' );
                //if (thisChunkEnd == string::npos) throw 1;
                
                string_res chunkProcessed = { supercorpus, COPY_VALUE, lastChunkEnd, thisChunkEnd };
                processThing( chunkProcessed, '-' );
#elif defined IMPL_STL
                size_t thisChunkEnd = supercorpus.find( ',', lastChunkEnd );
                if (thisChunkEnd == string::npos) throw 1;
                string chunkProcessed = supercorpus.substr(lastChunkEnd, thisChunkEnd-lastChunkEnd);
                processThing(chunkProcessed, '-');
#else 
#error Bad IMPL_
#endif
                MAYBE( PRINT(chunkProcessed) );

                lastChunkEnd = thisChunkEnd;
            #else
                #error Bad OP_
            #endif
    }
    end_actual = clock();
    double elapsed = ((double) (end_actual - start)) / CLOCKS_PER_SEC;
    printf("xxx,%d,%f,%d,%f\n", corpuslen, meanCorpusLen, t, elapsed);

    // malloc_stats();

    return 0;
}