treeh.c
1.45 KB
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#include "treeh.h"
//initializers & destroyer
tree make_empty_tree(){
return NULL;
}
node* make_empty_node(){
node*n=malloc(sizeof(node));
n->letter='\0';
n->isEnd=false;
for(int i=0;i<NBCHAR;i++)
n->next[i]=make_empty_tree();
}
node* make_node(char l,bool end){
node*n=malloc(sizeof(node));
n->letter=l;
n->isEnd=end;
for(int i=0;i<NBCHAR;i++)
n->next[i]=make_empty_tree();
}
void delete_tree(tree t){
if(is_empty(t))return;
for(int i=0;i<NBCHAR;i++)
delete_tree(t->next[i]);
free(t);
}
//Casual functions
bool is_empty(tree t){
return t==NULL;
}
bool is_followed(tree t){
int i;
for(i=0;i<NBCHAR;i++){
if(t->next[i]!=NULL)
return true;
}
return false;
}
bool is_end(tree t){
return t->isEnd;
}
int hash(char c){
//needs to check c wether isalpha or '\''
if(c='\'')
return 0;
return c%32;
}
//
bool addto_tree(tree t,string s,unsigned int index,bool isIn){
//recursive, when called : set isIn to true
//return wether s is already in t or not
if(s[0]=='\0'){
t->isEnd=true;
return isIn;
}
if(t->next[hash(s[0])]==NULL)
t->next[hash(s[0])]=make_node(s[0],false);
}
void addto_tree2(tree t,string s){
//faster than addto_tree, used when it is knowned the word is not yet in dictionnary
if(s[0]=='\0'){
t->isEnd=true;
return;
}
t->next[hash(s[0])]=make_node(s[0],false);
addto_tree2(t->next[hash(s[0])],
}
void loadfrom_file(tree,FILE*){}
void loadfrom_keyboard(tree){}