int main()
{
char file_name[100], word[45];
int no_of_words, i, isfound, min_distance[1000], min_dis_ref=100, min_distance2[1000];
printf("\nEnter the file name :");
scanf("%s", &file_name);
no_of_words = size_of_file(file_name) + 1;
if(no_of_words == 0)
return 0;
printf("\n No. of words found in the file = %d", no_of_words);
printf("\n******************Sorting the words from the dictionary-Start******************\n");
merge_sort(array_of_words, 0, no_of_words-1);
printf("\n******************Sorting the words from the dictionary-End******************\n");
printf("\nEnter the word :");
scanf("%s", &word);
strcat(word,"\n");
printf("\n******************Searching the words in the dictionary-Start******************\n");
isfound = binary_search(word, no_of_words);
if(isfound == 1)
printf("\nThe word exists in the dictionary");
else
{
printf("\nThe word does not exist in the dictionary");
for(i=0;i<no_of_words;i++)
{
min_distance[i]=edit_distance_recursive(word,array_of_words[i]);
if(min_distance[i] <= min_dis_ref)
min_dis_ref = min_distance[i];
}
//printf("\n%d",min_dis_ref);
printf("\nPossible suggestions are :");
for(i=0;i<no_of_words;i++)
{
if(min_distance[i] == min_dis_ref)
printf("\n%s",array_of_words[i]);
}
}
printf("\n******************Searching the words in the dictionary-End******************\n");
//for(i=0;i<no_of_words;i++)
//printf("%s",array_of_words[i]);
return 0;
}
int Engine::hide(const char * ar1, const char *ar2,const char *ar3) {
#ifdef __linux
FILE* source=fopen(ar2,"r+");
#endif
#ifdef __WIN32
FILE* source=fopen(ar2,"r+b");
#endif
if (source == NULL ) {
return 1;
}
FILE* target;
#ifdef __linux
FILE* txt=fopen(ar1,"r");
#endif
#ifdef __WIN32
FILE* txt=fopen(ar1,"rb");
#endif
if(txt == NULL ) {
return 1;
}
unsigned long size0 = size_of_file(source);
unsigned long size1 = size_of_file(txt);
unsigned char a,b;
unsigned short b0;
unsigned int i,j,space =55,type = 8,div;
if(fread(&b0,2,1,source) != 1 )
return 1;
switch(b0) {
case 0x4952 : {
fseek(source,34,SEEK_SET);
fscanf(source,"%c",&b);
type = b;
fseek(source,20,SEEK_SET);
fread(&b,1,1,source);
if(b!=1) return 4;
space=59;
#ifdef __linux__
target=fopen(strcat((char*)ar3,".wav"),"w+");
#endif
#ifdef __WIN32
target=fopen(strcat((char*)ar3,".wav"),"w+b");
#endif
break;
}
case 0x4d42 : {
fseek(source,28,SEEK_SET);
fread(&b,1,1,source);
if (b != 0x18) return 5;
fseek(source,29,SEEK_SET);
fread(&b,1,1,source);
if (b != 0) return 4;
space=55;
#ifdef __linux__
target=fopen(strcat((char*)ar3,".bmp"),"w+");
#endif
#ifdef __WIN32
target=fopen(strcat((char*)ar3,".bmp"),"w+b");
#endif
break;
}
default: {
return 2;
}
}
if(target == NULL ) {
return 1 ;
}
div = type/8;
if(noise) {
unsigned short *a,*b;
fseek(source,space,SEEK_SET);
a = (unsigned short*) calloc(2,size0-space);
b=a;
fread(a,size0-space,1,source);
fseek(source,space,SEEK_SET);
for(unsigned long i = 0; i< size0 -space; i++) {
a[i]^=rand()%2;
}
fwrite(a,size0-space,1,source);
}
fseek(source,0,SEEK_SET);
if ( (size1 * 8 ) < (( size0 - space )/(div)) ) {
for(i=0; i<(space-1); i++) {
fscanf(source,"%c",&a);
fprintf(target,"%c",a);
}
for (i = 0; i < size1; i++) {
fscanf(txt,"%c",&a);
for (j = 0; j < 8; j++) {
fread(&b0,div,1,source);
if (a & 0x80) {
b0 ^= 1;
}
fwrite(&b0,div,1,target);
a<<=1;
}
}
fread(&b0,div,1,source);
b0^=2;
fwrite(&b0,div,1,target);
for(i=0; i< (size0 - size1*type - space -((div)-1)); i++) {
fscanf(source,"%c",&a);
fprintf(target,"%c",a);
}
}
else {
switch(space) {
case 55:
remove(strcat((char*)ar3,".bmp"));
break;
case 59:
remove(strcat((char*)ar3,".wav"));
break;
default:
break;
}
return 3;
}
fclose(source);
fclose(target);
fclose(txt);
return 0;
}
int Engine::unhide(const char *ar1, const char *ar2,const char* ar3) {
int i,space = 55,type = 8,div;
#ifdef __linux__
FILE* source=fopen(ar2,"r");
FILE* target=fopen(ar1,"r");
FILE* txt=fopen(strcat((char*)ar3,".txt"),"w+");
#endif
#ifdef __WIN32
FILE* source=fopen(ar2,"rb");
FILE* target=fopen(ar1,"rb");
FILE* txt=fopen(strcat((char*)ar3,".txt"),"w+b");
#endif
if(source == NULL || target == NULL || txt == NULL) {
return 1;
}
unsigned char b=0,c=0;
unsigned short a0=0,b0=0;
int size0=size_of_file(source),k=0;
if(size0 != size_of_file(target)) return 6;
if(fread(&b0,2,1,source) != 1 )
return 1;
switch(b0) {
case 0x4952 : {
fseek(source,34,SEEK_SET);
fscanf(source,"%c",&b);
type = b;
fseek(source,20,SEEK_SET);
fread(&b,1,1,source);
if(b!=1) return 4;
space=59;
break;
}
case 0x4d42 : {
fseek(target,28,SEEK_SET);
fread(&b,1,1,target);
if (b != 0x18) return 5;
fseek(source,28,SEEK_SET);
fread(&b,1,1,source);
if (b != 0x18) return 5;
fseek(source,29,SEEK_SET);
fread(&b,1,1,source);
if (b != 0) return 4;
space=55;
break;
}
default: {
return 2;
}
}
div = type/8;
fseek(source,space-1,SEEK_SET);
fseek(target,space-1,SEEK_SET);
for (i = 0; i < size0-space; i++) {
fread(&a0,div,1,source);
fread(&b0,div,1,target);
if ((a0 ^ b0) == 2 ) {
break;
}
c ^= a0 ^ b0 ;
k++;
if( k == 8) {
fprintf(txt,"%c",c);
c=0;
k=0;
}
c<<=1;
}
fclose(source);
fclose(target);
fclose(txt);
return 0;
}
