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use std::collections::HashSet;
use std::cmp::Ordering;
use indexed_data_file::*;
use strings_set_file::*;
pub mod entity;
use entity::FieldEntity;
pub struct Field{
index: IndexedDataFile<FieldEntity>
,strings:StringsSetFile
}
impl Field{
pub fn new(path_prefix:&str) -> Result<Field,std::io::Error>{
match IndexedDataFile::new(&(path_prefix.to_string()+".i")){
Err(e)=>Err(e)
,Ok(index)=>{
match StringsSetFile::new(&(path_prefix.to_string()+".d")){
Ok(strings)=>Ok(Field{
index
,strings
})
,Err(e)=>Err(e)
}
}
}
}
pub fn entity<'a>(&self,id:u32)->Option<&'a FieldEntity>{
if let Some(v)=self.index.triee().entity_value(id){
Some(&v)
}else{
None
}
}
pub fn string<'a>(&self,id:u32)->Option<&'a str>{
if let Some(e)=self.entity(id){
Some(unsafe{std::ffi::CStr::from_ptr(
self.strings.offset(e.addr()) as *const libc::c_char
)}.to_str().unwrap())
}else{
None
}
}
pub fn search_match(&self,str:&str,and:Option<IdSet>)->IdSet{
let mut r:IdSet=HashSet::default();
let tree=self.index.triee();
let (ord,found_id)=tree.search_cb(|data|->Ordering{
let str2=unsafe{
std::ffi::CStr::from_ptr(
self.strings.offset(data.addr()) as *const libc::c_char
)
}.to_str().unwrap();
if str==str2{
Ordering::Equal
}else{
natord::compare(str,str2)
}
});
let found_id_i64=found_id as i64;
if let Some(and)=and{
if ord==Ordering::Equal{
if and.contains(&found_id_i64){
r.insert(found_id_i64);
}
tree.sames_and(&mut r,&and, found_id);
}
}else{
if ord==Ordering::Equal{
r.insert(found_id_i64);
tree.sames(&mut r, found_id);
}
}
r
}
pub fn update(&mut self,id:u32,addr:*const i8) -> Option<u32>{
if let RemoveResult::Unique(data)=self.index.delete(id){
self.strings.remove(&data.string()); }
let cont=unsafe{
std::ffi::CStr::from_ptr(addr)
}.to_str().unwrap();
let tree=self.index.triee();
let (ord,found_id)=tree.search_cb(|data|->Ordering{
let str2=unsafe{
std::ffi::CStr::from_ptr(
self.strings.offset(data.addr()) as *const libc::c_char
)
}.to_str().unwrap();
if cont==str2{
Ordering::Equal
}else{
natord::compare(cont,str2)
}
});
if ord==Ordering::Equal && found_id!=0{
if let Some(_node)=self.index.triee().node(id){
self.index.triee_mut().update_same(found_id,id);
Some(id)
}else{
self.index.insert_same(found_id)
}
}else{
if let Some(word)=self.strings.insert(cont){
let e=FieldEntity::new(
word.address()
,cont.parse().unwrap_or(0.0)
);
if let Some(_entity)=self.index.triee().node(id){
self.index.triee_mut().update_node(
found_id
,id
,e
,ord
);
Some(id)
}else{
self.index.insert_unique(e,found_id,ord)
}
}else{
None
}
}
}
pub fn delete(&mut self,id:u32){
self.index.delete(id);
}
}