helper.c

   1 /*A list of helper functions*/
   2
   3 #include "code.h"
   4 #include <time.h>
   5
   6 /*Prints text and pattern*/
   7 void print_pattern( char **text, char **pattern, int m, int n )
   8 {
   9         unsigned int i,j;
  10
  11         /*Prints the pattern*/
  12         for( j = 0; j < m; j++ ) {
  13                 for( i = 0; i < m; i++ )
  14                         printf("%i",pattern[j][i]);
  15
  16                 printf("\n");
  17         }
  18
  19         /*Prints the text*/
  20         for( j = 0; j < n; j++ ) {
  21                 for( i = 0; i < n; i++ )
  22                         printf("%i",text[j][i]);
  23
  24                 printf("\n");
  25         }
  26 }
  27
  28 /*Returns the square of a number*/
  29 int power(int number, int power)
  30 {
  31         int i, returned_number = number;
  32
  33         for( i = 1; i < power; i++ )
  34                 returned_number = returned_number * number;
  35
  36         return returned_number;
  37 }
  38
  39 /*Loads text and pattern into tables*/
  40 void load_files( char **text, char **pattern, int m, int n )
  41 {
  42         FILE *text_fp, *pattern_fp;
  43
  44         unsigned int i,j;
  45
  46         int c;
  47
  48         /*Pattern loading*/
  49         pattern_fp = fopen("data/pattern", "r");
  50
  51         for(j = 0; j < m; j++)
  52                 for(i = 0; i < m; i++) {
  53                         c = fgetc( pattern_fp );
  54                         /* If we encounter '\n' pull the next character*/
  55                         if( c != 10 )
  56                                 pattern[j][i] = c;
  57                         else
  58                                 pattern[j][i] = fgetc( pattern_fp );
  59                 }
  60
  61         fclose(pattern_fp);
  62
  63         /*Text loading*/
  64         text_fp = fopen("data/text", "r");
  65
  66         for( j = 0; j < n; j++ )
  67                 for( i = 0; i < n; i++ ) {
  68                         c = fgetc (text_fp);
  69                         /* If we encounter '\n' pull the next character*/
  70                         if( c != 10 )
  71                                 text[j][i] = c;
  72                         else
  73                                 text[j][i] = fgetc( text_fp );
  74                 }
  75
  76         fclose(text_fp);
  77 }
  78
  79 /*Loads text and pattern into tables*/
  80 void create_files(int pattern_size, int text_size, int alphabet)
  81 {
  82         FILE *text_fp, *pattern_fp;
  83
  84         unsigned int i,j;
  85
  86         /* initialize random seed: */
  87         srand( time( NULL ) );
  88
  89         /*Creating pattern*/
  90         pattern_fp = fopen("data/pattern", "w");
  91
  92         for( j = 0; j < pattern_size; j++ ) {
  93                 for( i = 0; i < pattern_size; i++ )
  94                         fputc( rand() % alphabet + 1, pattern_fp );
  95                 fputc( 10, pattern_fp );
  96         }
  97
  98         fclose( pattern_fp );
  99
 100         /*Creating text*/
 101         text_fp = fopen("data/text", "w");
 102
 103         for( j = 0; j < text_size; j++ ){
 104                 for( i = 0; i < text_size; i++ )
 105                         fputc ( rand() % alphabet + 1, text_fp );
 106                 fputc ( 10, text_fp );
 107         }
 108
 109         fclose( text_fp );
 110 }
 111