--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/chromeister/src/CHROMEISTER.c	Wed Dec 12 07:18:40 2018 -0500
@@ -0,0 +1,651 @@
+/*********
+
+File        CHROMEISTER.c
+Author      EPW <estebanpw@uma.es>
+Description Computes hits and generates a dotplot
+
+USAGE       Usage is described by calling ./CHROMEISTER --help
+
+
+
+**********/
+
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+#include <string.h>
+#include <ctype.h>
+#include "structs.h"
+#include "alignmentFunctions.h"
+#include "commonFunctions.h"
+#define STARTING_SEQS 1000
+#define PIECE_OF_DB_REALLOC 3200000 //half a gigabyte if divided by 8 bytes
+#define RANGE 2
+
+uint64_t custom_kmer = 32; // Defined as external in structs.h
+uint64_t diffuse_z = 4; // Defined as external in structs.h
+
+uint64_t get_seq_len(FILE * f);
+
+
+void init_args(int argc, char ** av, FILE ** query, FILE ** database, FILE ** out_database, uint64_t * custom_kmer, uint64_t * dimension, uint64_t * diffuse_z);
+
+int main(int argc, char ** av){
+    
+
+    /*
+    //Store positions of kmers
+    uint64_t n_pools_used = 0;
+    //Mempool_l * mp = (Mempool_l *) malloc(MAX_MEM_POOLS*sizeof(Mempool_l));
+    //if(mp == NULL) terror("Could not allocate vectors for memory pools");
+    Mempool_l mp[MAX_MEM_POOLS];
+    init_mem_pool_llpos(&mp[n_pools_used]);
+    //llpos * aux;
+
+    uint64_t n_pools_used_AVL = 0;
+    Mempool_AVL mp_AVL[MAX_MEM_POOLS];
+    init_mem_pool_AVL(&mp_AVL[n_pools_used_AVL]);
+    */
+    Tuple_hits * thit;
+    
+    /*
+    AVLTree * root = NULL;
+    root = insert_AVLTree(root, 10, mp_AVL, &n_pools_used_AVL, 0, mp, &n_pools_used);
+    
+    llpos * some = find_AVLTree(root, 25);
+    while(some != NULL){
+        printf("#%"PRIu64", ", some->pos); some = some->next;
+    }
+    */
+
+    uint64_t i, j;
+
+    //query to read kmers from, database to find seeds
+    FILE * query = NULL, * database = NULL, * out_database = NULL;
+    uint64_t dimension = 1000; // Default 1000 * 1000
+    
+    
+    init_args(argc, av, &query, &database, &out_database, &custom_kmer, &dimension, &diffuse_z);
+
+
+
+    unsigned char char_converter[91];
+    char_converter[(unsigned char)'A'] = 0;
+    char_converter[(unsigned char)'C'] = 1;
+    char_converter[(unsigned char)'G'] = 2;
+    char_converter[(unsigned char)'T'] = 3;
+
+    
+    // Variables to account for positions
+    // Print info
+    fprintf(stdout, "[INFO] Loading database\n");
+    // Variables to read kmers
+    char c = 'N'; //Char to read character
+    // Current length of array and variables for the buffer
+    uint64_t idx = 0, r = 0;
+    
+    //Vector to read in batches
+    char * temp_seq_buffer = NULL;
+    if ((temp_seq_buffer = calloc(READBUF, sizeof(char))) == NULL) {
+        terror("Could not allocate memory for read buffer");
+    }
+
+    //Dimensional matrix
+    uint64_t ** representation = (uint64_t **) calloc(dimension+1, sizeof(uint64_t *));
+    if(representation == NULL) terror("Could not allocate representation");
+    for(i=0; i<dimension+1; i++){
+        representation[i] = (uint64_t *) calloc(dimension+1, sizeof(uint64_t));
+        if(representation[i] == NULL) terror("Could not allocate second loop representation");
+    }
+
+    /*
+    fseek(database, 0, SEEK_END);
+    uint64_t aprox_len_query = ftell(database);
+    uint64_t aprox_len_db = aprox_len_query;
+    rewind(database);
+    */
+    uint64_t aprox_len_query = get_seq_len(database);
+    uint64_t aprox_len_db = aprox_len_query;
+
+    uint64_t a_hundreth = (aprox_len_query/100);
+
+    unsigned char curr_kmer[custom_kmer], reverse_kmer[custom_kmer];
+    curr_kmer[0] = reverse_kmer[0] = '\0';
+    uint64_t word_size = 0, word_size_rev = 0;
+
+    //To hold all information related to database
+    uint64_t current_len = 0;
+    
+    //To force reading from the buffer
+    idx = READBUF + 1;
+
+    //unsigned char aux_kmer[custom_kmer+1];
+    
+    //Vector to store query seq
+    unsigned char * seq_vector_query = (unsigned char *) malloc(READBUF*sizeof(unsigned char));
+    if(seq_vector_query == NULL) terror("Could not allocate memory for query vector");
+
+    /*
+    Container * ct = (Container *) calloc(1, sizeof(Container));
+    if(ct == NULL) terror("Could not allocate container");    
+    */
+
+
+
+    Index * ctidx = (Index *) calloc(1, sizeof(Index));
+    if(ctidx == NULL) terror("Could not allocate container");
+    
+
+    //begin = clock();
+    
+
+    c = buffered_fgetc(temp_seq_buffer, &idx, &r, database);
+    while((!feof(database) || (feof(database) && idx < r))){
+
+        if(c == '>'){
+            
+
+
+            while(c != '\n') c = buffered_fgetc(temp_seq_buffer, &idx, &r, database);  //Skip ID
+                
+
+            while(c != '>' && (!feof(database) || (feof(database) && idx < r))){ //Until next id
+                c = buffered_fgetc(temp_seq_buffer, &idx, &r, database);
+                c = toupper(c);
+                if(c == 'A' || c == 'C' || c == 'G' || c == 'T'){
+                    curr_kmer[word_size] = (unsigned char) c;
+                    if(word_size < custom_kmer) ++word_size;
+                    ++current_len;
+                    if(current_len % a_hundreth == 0){ 
+                        fprintf(stdout, "\r%"PRIu64"%%...", 1+100*current_len/aprox_len_query); 
+                        //printf("%"PRIu64"%%..wasted: (%e) (%e)", 1+100*pos_in_query/aprox_len_query, (double)(wasted_cycles_forward)/CLOCKS_PER_SEC, (double)(wasted_cycles_reverse)/CLOCKS_PER_SEC); 
+                        fflush(stdout);
+                    }
+                    
+
+
+                }else{ //It can be anything (including N, Y, X ...)
+
+                    if(c != '\n' && c != '>'){
+                        word_size = 0;
+                        // data_database.sequences[pos_in_database++] = (unsigned char) 'N'; //Convert to N
+                        ++current_len;
+
+                    } 
+                }
+                //if(current_len % 1000000 == 0) printf(" curr len %" PRIu64"\n", current_len);
+                if(word_size == custom_kmer){
+                    //write to hash table
+                    
+
+                    thit = &ctidx->table[char_converter[curr_kmer[0]]][char_converter[curr_kmer[1]]][char_converter[curr_kmer[2]]]
+                    [char_converter[curr_kmer[3]]][char_converter[curr_kmer[4]]][char_converter[curr_kmer[5]]]
+                    [char_converter[curr_kmer[6]]][char_converter[curr_kmer[7]]][char_converter[curr_kmer[8]]]
+                    [char_converter[curr_kmer[9]]][char_converter[curr_kmer[10]]][char_converter[curr_kmer[11]]];
+                    
+                    /*
+                    typedef struct tuple_hits{
+                        int repetition;
+                        int hit_count;
+                        uint64_t key;
+                        uint64_t pos;
+                    } Tuple_hits;
+                    */
+
+                    if(thit->repetition == FALSE){
+                        // Then we can insert
+                        thit->hit_count = 0;
+                        thit->key = collisioned_hash(&curr_kmer[0], custom_kmer);
+                        thit->pos = current_len;
+                    }else{
+                        // Otherwise we break it
+                        thit->repetition = TRUE;
+                    }
+
+                    //thit->root = insert_AVLTree(thit->root, hashOfWord(&curr_kmer[0], custom_kmer, FIXED_K), mp_AVL, &n_pools_used_AVL, current_len, mp, &n_pools_used);
+                    //thit->root = insert_AVLTree(thit->root, collisioned_hash(&curr_kmer[0], custom_kmer), mp_AVL, &n_pools_used_AVL, current_len, mp, &n_pools_used);
+                    
+                    
+
+                    // Non overlapping
+                    word_size = 0;
+                    
+		
+		    // Overlapping
+                    //memmove(&curr_kmer[0], &curr_kmer[1], custom_kmer-1);
+                    //--word_size;
+                }
+            }
+            word_size = 0;
+            
+        }else{
+            c = buffered_fgetc(temp_seq_buffer, &idx, &r, database);    
+        }
+        
+    }
+
+
+    //end = clock();
+
+    // data_database.total_len = pos_in_database;
+
+    //fprintf(stdout, "[INFO] Database loaded and of length %"PRIu64". Hash table building took %e seconds\n", data_database.total_len, (double)(end-begin)/CLOCKS_PER_SEC);
+    fprintf(stdout, "[INFO] Database loaded and of length %"PRIu64".\n", current_len);
+    //close database
+    fclose(database);
+
+    
+    
+    //begin = clock();
+    
+
+    
+    
+    
+    double pixel_size_db = (double) dimension / (double) current_len;
+    double ratio_db = (double) current_len / dimension;
+
+
+    // Get file length
+    
+    //fseek(query, 0, SEEK_END);
+    //aprox_len_query = ftell(query);
+    //rewind(query);
+    aprox_len_query = get_seq_len(query);
+
+    //uint64_t reallocs_hash_holder_table = 1;
+    //uint64_t n_items_hash_holder_table = aprox_len_query / 5;
+
+    //Hash_holder * hash_holder_table = (Hash_holder *) calloc(n_items_hash_holder_table, sizeof(Hash_holder));
+    //if(hash_holder_table == NULL) terror("Could not allocate hash holding table");
+
+    a_hundreth = (aprox_len_query/100);
+    double pixel_size_query = (double) dimension / (double) aprox_len_query;
+    double ratio_query = (double) aprox_len_query / dimension;
+    
+
+    double i_r_fix = MAX(1.0, custom_kmer * pixel_size_query);
+    double j_r_fix = MAX(1.0, custom_kmer * pixel_size_db);
+
+    
+    
+    fprintf(stdout, "[INFO] Ratios: Q [%e] D [%e]. Lenghts: Q [%"PRIu64"] D [%"PRIu64"]\n", ratio_query, ratio_db, aprox_len_query, current_len);
+    fprintf(stdout, "[INFO] Pixel size: Q [%e] D [%e].\n", pixel_size_query, pixel_size_db);
+
+
+    fprintf(stdout, "[INFO] Computing absolute hit numbers.\n");
+
+
+    current_len = 0;
+
+    //llpos * the_original_hit;
+
+    //To force reading from the buffer
+    idx = READBUF + 1;
+    c = buffered_fgetc(temp_seq_buffer, &idx, &r, query);    
+    //uint64_t c_hash_holder = 0;
+    
+    while((!feof(query) || (feof(query) && idx < r))){
+
+        if(c == '>'){
+            word_size = 0;
+            word_size_rev = custom_kmer-1;
+            
+
+
+
+            while(c != '\n'){ c = buffered_fgetc(temp_seq_buffer, &idx, &r, query); } //Skip ID
+                
+
+            while(c != '>' && (!feof(query) || (feof(query) && idx < r))){ //Until next id
+                c = buffered_fgetc(temp_seq_buffer, &idx, &r, query);
+                c = toupper(c);
+                if(c == 'A' || c == 'C' || c == 'G' || c == 'T'){
+                    
+                    ++current_len;
+                    if(current_len % a_hundreth == 0){ 
+                        fprintf(stdout, "\r%"PRIu64"%%...", 1+100*current_len/aprox_len_query); 
+                        fflush(stdout);
+                    }
+                    curr_kmer[word_size] = (unsigned char) c;
+                    ++word_size;
+
+                    switch(c){
+                        case ('A'): reverse_kmer[word_size_rev] = (unsigned)'T';
+                        break;
+                        case ('C'): reverse_kmer[word_size_rev] = (unsigned)'G';
+                        break;
+                        case ('G'): reverse_kmer[word_size_rev] = (unsigned)'C';
+                        break;
+                        case ('T'): reverse_kmer[word_size_rev] = (unsigned)'A';
+                        break;
+                    }
+                    if(word_size_rev != 0) --word_size_rev;
+
+
+
+                    
+                    if(word_size == custom_kmer){
+
+
+                        //hash_forward = hashOfWord(&curr_kmer[0], custom_kmer, FIXED_K);
+                        //hash_reverse = hashOfWord(&reverse_kmer[0], custom_kmer, FIXED_K);
+                        uint64_t hash_forward, hash_reverse;
+                        hash_forward = collisioned_hash(&curr_kmer[0], custom_kmer);
+                        hash_reverse = collisioned_hash(&reverse_kmer[0], custom_kmer);
+                        
+
+                        thit = &ctidx->table[char_converter[curr_kmer[0]]][char_converter[curr_kmer[1]]][char_converter[curr_kmer[2]]]
+                        [char_converter[curr_kmer[3]]][char_converter[curr_kmer[4]]][char_converter[curr_kmer[5]]]
+                        [char_converter[curr_kmer[6]]][char_converter[curr_kmer[7]]][char_converter[curr_kmer[8]]]
+                        [char_converter[curr_kmer[9]]][char_converter[curr_kmer[10]]][char_converter[curr_kmer[11]]];
+
+                        //AVLTree * search = find_AVLTree(thit->root, hash_forward);
+
+                        if(thit->repetition == FALSE && hash_forward == thit->key){
+                            // Attention ::::: you were not removing the ones with count==1 earlier 
+                            thit->pos_in_y = current_len;
+                            thit->hit_count++;
+                        }
+
+                        thit = &ctidx->table[char_converter[reverse_kmer[0]]][char_converter[reverse_kmer[1]]][char_converter[reverse_kmer[2]]]
+                        [char_converter[reverse_kmer[3]]][char_converter[reverse_kmer[4]]][char_converter[reverse_kmer[5]]]
+                        [char_converter[reverse_kmer[6]]][char_converter[reverse_kmer[7]]][char_converter[reverse_kmer[8]]]
+                        [char_converter[reverse_kmer[9]]][char_converter[reverse_kmer[10]]][char_converter[reverse_kmer[11]]];
+
+                        if(thit->repetition == FALSE && hash_reverse == thit->key){
+                            // Attention ::::: you were not removing the ones with count==1 earlier 
+                            thit->pos_in_y = current_len;
+                            thit->hit_count++;
+                        }
+
+                        /*
+                        if(search != NULL && search->count == 1){ //If count is two, then it is a rep
+                            thit->hit_count += search->count;
+                            
+                            hash_holder_table[c_hash_holder].pos = current_len;
+                            hash_holder_table[c_hash_holder].node = search;
+                            hash_holder_table[c_hash_holder].th = thit;
+                            ++c_hash_holder;
+                            if(c_hash_holder == n_items_hash_holder_table*reallocs_hash_holder_table){
+                                ++reallocs_hash_holder_table;
+                                hash_holder_table = (Hash_holder *) realloc(hash_holder_table, n_items_hash_holder_table*reallocs_hash_holder_table*sizeof(Hash_holder));
+                                if(hash_holder_table == NULL) terror("Could not realloc hash holder table");
+                            }
+                        }
+                        */
+
+                        
+
+                        
+
+                        //search = find_AVLTree(thit->root, hash_reverse);
+                        /*
+                        if(search != NULL && search->count == 1){ //If count is two, then it is a rep
+                            
+                            thit->hit_count += search->count;
+                            hash_holder_table[c_hash_holder].pos = current_len;
+                            hash_holder_table[c_hash_holder].node = search;
+                            hash_holder_table[c_hash_holder].th = thit;
+                            ++c_hash_holder;
+                            if(c_hash_holder == n_items_hash_holder_table*reallocs_hash_holder_table){
+                                ++reallocs_hash_holder_table;
+                                hash_holder_table = (Hash_holder *) realloc(hash_holder_table, n_items_hash_holder_table*reallocs_hash_holder_table*sizeof(Hash_holder));
+                                if(hash_holder_table == NULL) terror("Could not realloc hash holder table");
+                            }
+                        }
+                        */
+
+                        // Overlapping
+                        
+                        memmove(&curr_kmer[0], &curr_kmer[1], custom_kmer-1);
+                        memmove(&reverse_kmer[1], &reverse_kmer[0], custom_kmer-1);
+                        --word_size;
+
+                        // Non overlapping
+                        //word_size = 0;
+                        //word_size_rev = custom_kmer-1;
+                    }
+                }else{
+                    if(c != '\n' && c != '>'){
+                        word_size = 0;
+                        word_size_rev = custom_kmer-1;
+                        ++current_len;
+                    }
+                }
+            }
+        }else{
+            c = buffered_fgetc(temp_seq_buffer, &idx, &r, query);    
+        }
+        
+    } 
+
+    /// Out
+
+    fprintf(stdout, "Scanning hits table.\n");
+
+    a_hundreth = MAX(1, TOTAL_ENTRIES/100);
+    uint64_t t_computed = 0;
+    uint64_t w0,w1,w2,w3,w4,w5,w6,w7,w8,w9,w10,w11;
+    for(w0=0;w0<4;w0++){
+        for(w1=0;w1<4;w1++){
+            for(w2=0;w2<4;w2++){
+                for(w3=0;w3<4;w3++){
+                    for(w4=0;w4<4;w4++){
+                        for(w5=0;w5<4;w5++){
+                            for(w6=0;w6<4;w6++){
+                                for(w7=0;w7<4;w7++){
+                                    for(w8=0;w8<4;w8++){
+                                        for(w9=0;w9<4;w9++){
+                                            for(w10=0;w10<4;w10++){
+                                                for(w11=0;w11<4;w11++){
+
+                                                    if(t_computed % a_hundreth == 0){ 
+                                                        fprintf(stdout, "\r%"PRIu64"%%...", 1+100*t_computed/TOTAL_ENTRIES); 
+                                                        fflush(stdout);
+                                                    }
+                                                    ++t_computed;
+                                                    Tuple_hits * taux = &ctidx->table[w0][w1][w2][w3][w4][w5][w6][w7][w8][w9][w10][w11];
+                                                    if(taux->hit_count == 1){
+                                                        // We plot it   
+                                                        // Convert scale to representation
+                                                        uint64_t redir_db = (uint64_t) (taux->pos / (ratio_db));
+                                                        uint64_t redir_query = (uint64_t) (taux->pos_in_y / (ratio_query));
+                                                        double i_r = i_r_fix; double j_r = j_r_fix;
+                                                        while((uint64_t) i_r >= 1 && (uint64_t) j_r >= 1){
+                                                            if((int64_t) redir_query - (int64_t) i_r > 0 && (int64_t) redir_db - (int64_t) j_r > 0){
+                                                                representation[(int64_t) redir_query - (int64_t) i_r][(int64_t) redir_db - (int64_t) j_r]++;
+                                                            }else{
+                                                                representation[redir_query][redir_db]++;
+                                                                break;
+                                                            }
+                                                            i_r -= MIN(1.0, pixel_size_query);
+                                                            j_r -= MIN(1.0, pixel_size_db);
+                                                        }                                                     
+                                                    }
+                                                }
+                                            }
+                                        }
+                                    }
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+        }
+    }
+    
+
+    //double average_hit = ((double) total_hits / (double) table_size);
+    //average_hit = 2.2;
+
+    /*
+    //fprintf(stdout, "[INFO] Total hit count is %"PRIu64" on a size of %"PRIu64" Avg = %e.\n", total_hits, table_size, average_hit);
+    fprintf(stdout, "[INFO] Total hit count is %"PRIu64" on a size of %"PRIu64" E' = %e.\n", total_hits, table_size, Eprime);
+
+    
+
+    
+
+    a_hundreth = MAX(1,c_hash_holder/100);
+    
+    for(current_len = 0; current_len < c_hash_holder; current_len++){
+
+        if(current_len % a_hundreth == 0){ 
+            fprintf(stdout, "\r%"PRIu64"%%...", 1+100*current_len/c_hash_holder); 
+            fflush(stdout);
+        }
+
+        aux = hash_holder_table[current_len].node->next;
+
+        //if(hash_holder_table[current_len].th->hit_count < (uint64_t) average_hit){
+        if(hash_holder_table[current_len].th->hit_count < (uint64_t) Eprime){
+            while(aux != NULL){
+                // Convert scale to representation
+                uint64_t redir_db = (uint64_t) (aux->pos / (ratio_db));
+                uint64_t redir_query = (uint64_t) (hash_holder_table[current_len].pos / (ratio_query));
+                double i_r = i_r_fix; double j_r = j_r_fix;
+                while((uint64_t) i_r >= 1 && (uint64_t) j_r >= 1){
+                    if((int64_t) redir_query - (int64_t) i_r > 0 && (int64_t) redir_db - (int64_t) j_r > 0){
+                        representation[(int64_t) redir_query - (int64_t) i_r][(int64_t) redir_db - (int64_t) j_r]++;
+                    }else{
+                        representation[redir_query][redir_db]++;
+                        break;
+                    }
+                    i_r -= MIN(1.0, pixel_size_query);
+                    j_r -= MIN(1.0, pixel_size_db);
+                }
+                aux = aux->next;
+            }
+        }
+    }
+    */
+
+
+    //end = clock();
+
+    
+    
+
+    //fprintf(stdout, "\n[INFO] Query length %"PRIu64". Hits completed. Took %e seconds\n", data_query.total_len, (double)(end-begin)/CLOCKS_PER_SEC);
+    fprintf(stdout, "\n[INFO] Query length %"PRIu64".\n", current_len);
+
+    //begin = clock();
+
+    //reads_per_thread = (uint64_t) (floorl((long double) data_query.n_seqs / (long double) n_threads));
+    
+    fprintf(stdout, "[INFO] Writing matrix.\n");
+
+
+    uint64_t unique_diffuse = 0;
+	fprintf(out_database, "%"PRIu64"\n", aprox_len_query);
+    fprintf(out_database, "%"PRIu64"\n", aprox_len_db);
+     // And replace 2's with 1's 
+	
+    for(i=0; i<dimension+1; i++){
+        for(j=0; j<dimension; j++){
+            fprintf(out_database, "%"PRIu64" ", representation[i][j]);
+	    unique_diffuse += representation[i][j];
+        }
+        fprintf(out_database, "%"PRIu64"\n",  representation[i][dimension]);
+	unique_diffuse += representation[i][dimension];
+    }
+
+    fprintf(stdout, "[INFO] Found %"PRIu64" unique hits for z = %"PRIu64".\n", unique_diffuse, diffuse_z);
+    
+
+    
+    //free(ct->table);
+    //free(hash_holder_table);
+    /*
+    for(i=0;i<=n_pools_used_AVL;i++){
+        free(mp_AVL[i].base);
+    }
+
+    for(i=0;i<=n_pools_used;i++){
+        free(mp[i].base);
+    }
+    */
+    for(i=0;i<dimension;i++){
+        free(representation[i]);
+    }
+    free(representation);
+    if(out_database != NULL) fclose(out_database);
+    
+    return 0;
+}
+
+void init_args(int argc, char ** av, FILE ** query, FILE ** database, FILE ** out_database, uint64_t * custom_kmer, uint64_t * dimension, uint64_t * diffuse_z){
+
+    int pNum = 0;
+    while(pNum < argc){
+        if(strcmp(av[pNum], "--help") == 0){
+            fprintf(stdout, "USAGE:\n");
+            fprintf(stdout, "           CHROMEISTER -query [query] -db [database] -out [outfile]\n");
+            fprintf(stdout, "OPTIONAL:\n");
+            fprintf(stdout, "           -kmer       [Integer:   k>1 (default 32)]\n");
+	    fprintf(stdout, "		-diffuse    [Integer:   z>0 (default 4)]\n");
+            fprintf(stdout, "           -dimension  Size of the output [Integer:   d>0 (default 1000)]\n");
+            fprintf(stdout, "           -out        [File path]\n");
+            fprintf(stdout, "           --help      Shows help for program usage\n");
+            fprintf(stdout, "\n");
+            fprintf(stdout, "PLEASE NOTICE: The reverse complementary is calculated for the QUERY.\n");
+            exit(1);
+        }
+        if(strcmp(av[pNum], "-query") == 0){
+            *query = fopen64(av[pNum+1], "rt");
+            if(query==NULL) terror("Could not open query file");
+        }
+        if(strcmp(av[pNum], "-db") == 0){
+            *database = fopen64(av[pNum+1], "rt");
+            if(database==NULL) terror("Could not open database file");
+        }
+        if(strcmp(av[pNum], "-out") == 0){
+            *out_database = fopen(av[pNum+1], "wt");
+            if(out_database==NULL) terror("Could not open output database file");
+        }
+        if(strcmp(av[pNum], "-kmer") == 0){
+            *custom_kmer = (uint64_t) atoi(av[pNum+1]);
+            if(*custom_kmer < BYTES_IN_MER) terror("K-mer size must be larger than 4");
+            if(*custom_kmer % BYTES_IN_MER != 0) terror("K-mer size must be a multiple of 4");
+
+        }
+        if(strcmp(av[pNum], "-diffuse") == 0){
+            *diffuse_z = (uint64_t) atoi(av[pNum+1]);
+            if(*diffuse_z == 0 || *diffuse_z > 32) terror("Z must satisfy 0<z<=32");
+
+        }
+
+        if(strcmp(av[pNum], "-dimension") == 0){
+            *dimension = (uint64_t) atoi(av[pNum+1]);
+            if(*dimension < 1) terror("Dimension must be a positive integer");
+        }
+        
+        pNum++;
+    }
+    
+    if(*query==NULL || *database==NULL || *out_database==NULL) terror("A query, database and output file is required");
+}
+
+uint64_t get_seq_len(FILE * f) {
+    char c = '\0';
+    uint64_t l = 0;
+
+    while(!feof(f)){
+        c = getc(f);
+
+        if(c == '>'){
+            while(c != '\n') c = getc(f);
+        }
+        c = toupper(c);
+        if(c >= 'A' && c <= 'Z'){
+            ++l;
+        }
+    }
+
+
+    rewind(f);
+    return l;
+}