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"use strict";
const assert = require("assert");
const defs = require('./defs.js');
class TString {
constructor(L, str) {
this.hash = null;
this.realstring = str;
}
getstr() {
return this.realstring;
}
tsslen() {
return this.realstring.length;
}
}
const luaS_eqlngstr = function(a, b) {
assert(a instanceof TString);
assert(b instanceof TString);
return a == b || (a.realstring.length == b.realstring.length && a.realstring.join() == b.realstring.join());
};
/* converts strings (arrays) to a consistent map key */
const luaS_hash = function(str) {
assert(Array.isArray(str));
return str.map(e => `${e}|`).join('');
};
const luaS_hashlongstr = function(ts) {
assert(ts instanceof TString);
if(ts.hash === null) {
ts.hash = luaS_hash(ts.getstr());
}
return ts.hash;
};
/* variant that takes ownership of array */
const luaS_bless = function(L, str) {
Object.freeze(str);
return new TString(L, str);
};
/* makes a copy */
const luaS_new = function(L, str) {
return luaS_bless(L, str.slice(0));
};
/* takes a js string */
const luaS_newliteral = function(L, str) {
return luaS_bless(L, defs.to_luastring(str));
};
module.exports.luaS_eqlngstr = luaS_eqlngstr;
module.exports.luaS_hash = luaS_hash;
module.exports.luaS_hashlongstr = luaS_hashlongstr;
module.exports.luaS_bless = luaS_bless;
module.exports.luaS_new = luaS_new;
module.exports.luaS_newliteral = luaS_newliteral;
module.exports.TString = TString;
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