treeh.c
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#include "treeh.h"
//initializers & destroyer
tree make_empty_tree(){
return NULL;
}
node* make_empty_node(){
//<=> make_node('\0',NOT_AN_END)
node*n=malloc(sizeof(node));
n->letter='\0';
n->isEnd=NOT_AN_END;
for(int i=0;i<NBCHAR;i++)
n->next[i]=make_empty_tree();
return n;
}
node* make_node(char l,byte 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();
return n;
}
void delete_tree(tree *t){
if(is_empty(*t))return;
for(int i=0;i<NBCHAR;i++)
delete_tree(&((*t)->next[i]));
free(*t);
*t=NULL;
}
//Casual functions
bool is_empty(const tree t){
return t==NULL;
}
bool is_followed(const tree t){
int i;
for(i=0;i<NBCHAR;i++){
if(t->next[i]!=NULL)
return true;
}
return false;
}
//functions is_end
bool is_end(const tree t){return t->isEnd;}
bool is_straight_end(const tree t){return (t->isEnd & STRAIGHT_END);}
bool ends_with_apostrophe(const tree t){return (t->isEnd & APOSTROPHE_END);}
bool is_common_end(const tree t){return (t->isEnd & COMMON_END);}
bool is_proper_end(const tree t){return (t->isEnd & PROPER_END);}
bool is_acronyme_end(const tree t){return (t->isEnd & ACRONYME_END);}
//functions not directly related to the structure
int hash(char c){return c%32-1;}//needs to check c wether isalpha
bool ischar_of_word(char c){return (c=='\'' || isalpha(c));}
bool is_word(const byte endKind){return endKind!=NOT_AN_END;}
byte end_kind(const string s){
byte endKind=NOT_AN_END;
int i=1;
//1st, let's consider all letters
if(!isalpha(s[0]))
return NOT_AN_END;
if(islower(s[0])){
endKind=COMMON_END;
while(islower(s[i]))i++;
}
else {//if isupper(s[0])
endKind=PROPER_END;
if(isalpha(s[1])){
if(islower(s[1])){
endKind=PROPER_END;
i=2;
while(islower(s[i]))i++;
}
else{//if isupper(s[1])
endKind=ACRONYME_END;
i=2;
while(isupper(s[i]))i++;
}
}
}
//then let's consider the end
if(s[i]=='\0'){
return (endKind & STRAIGHT_END);
}
if(s[i]=='\'' && s[i+1]=='s' && s[i+2]=='\0'){
return (endKind & APOSTROPHE_END);
}
return NOT_AN_END;
}