why did we even use an c dynamic link in node js

package-lock.json

@@ -6,7 +6,7 @@
   "packages": {
     "": {
       "name": "fm-dx-webserver",
-      "version": "1.3.11",
+      "version": "1.3.12",
       "license": "ISC",
       "dependencies": {
         "@mapbox/node-pre-gyp": "2.0.0",

server/datahandler.js

@@ -1,213 +1,7 @@
 /* Libraries / Imports */
-const fs = require('fs');
-const https = require('https');
-const koffi = require('koffi');
-const path = require('path');
-const os = require('os');
-const platform = os.platform();
-const cpuArchitecture = os.arch();
 const { configName, serverConfig, configUpdate, configSave } = require('./server_config');
-let unicode_type;
+const RDSDecoder = require("./rds.js");
-let shared_Library;
-
-if (platform === 'win32') {
-  unicode_type = 'int16_t';
-  arch_type = (cpuArchitecture === 'x64' ? 'mingw64' : 'mingw32');
-  shared_Library=path.join(__dirname, "libraries", arch_type, "librdsparser.dll");
-} else if (platform === 'linux') {
-  unicode_type = 'int32_t';
-  arch_type = (cpuArchitecture === 'x64' ? 'x86_64' :
-               (cpuArchitecture === 'ia32' ? 'x86' :
-               (cpuArchitecture === 'arm64' ? 'aarch64' : cpuArchitecture)));
-  shared_Library=path.join(__dirname, "libraries", arch_type, "librdsparser.so");
-} else if (platform === 'darwin') {
-  unicode_type = 'int32_t';
-  shared_Library=path.join(__dirname, "libraries", "macos", "librdsparser.dylib");
-}
-
-const lib = koffi.load(shared_Library);
 const { fetchTx } = require('./tx_search.js');
-
-koffi.proto('void callback_pi(void *rds, void *user_data)');
-koffi.proto('void callback_pty(void *rds, void *user_data)');
-koffi.proto('void callback_tp(void *rds, void *user_data)');
-koffi.proto('void callback_ta(void *rds, void *user_data)');
-koffi.proto('void callback_ms(void *rds, void *user_data)');
-koffi.proto('void callback_ecc(void *rds, void *user_data)');
-koffi.proto('void callback_country(void *rds, void *user_data)');
-koffi.proto('void callback_af(void *rds, uint32_t af, void *user_data)');
-koffi.proto('void callback_ps(void *rds, void *user_data)');
-koffi.proto('void callback_rt(void *rds, int flag, void *user_data)');
-koffi.proto('void callback_ptyn(void *rds, void *user_data)');
-koffi.proto('void callback_ct(void *rds, void *ct, void *user_data)');
-
-const rdsparser = {
-  new: lib.func('void* rdsparser_new()'),
-  free: lib.func('void rdsparser_free(void *rds)'),
-  clear: lib.func('void rdsparser_clear(void *rds)'),
-  parse_string: lib.func('bool rdsparser_parse_string(void *rds, const char *input)'),
-  set_text_correction: lib.func('void rdsparser_set_text_correction(void *rds, uint8_t text, uint8_t type, uint8_t error)'),
-  set_text_progressive: lib.func('void rdsparser_set_text_progressive(void *rds, uint8_t string, uint8_t state)'),
-  get_pi: lib.func('int32_t rdsparser_get_pi(void *rds)'),
-  get_pty: lib.func('int8_t rdsparser_get_pty(void *rds)'),
-  get_tp: lib.func('int8_t rdsparser_get_tp(void *rds)'),
-  get_ta: lib.func('int8_t rdsparser_get_ta(void *rds)'),
-  get_ms: lib.func('int8_t rdsparser_get_ms(void *rds)'),
-  get_ecc: lib.func('int16_t rdsparser_get_ecc(void *rds)'),
-  get_country: lib.func('int rdsparser_get_country(void *rds)'),
-  get_ps: lib.func('void* rdsparser_get_ps(void *rds)'),
-  get_rt: lib.func('void* rdsparser_get_rt(void *rds, int flag)'),
-  get_ptyn: lib.func('void* rdsparser_get_ptyn(void *rds)'),
-  register_pi: lib.func('void rdsparser_register_pi(void *rds, void *cb)'),
-  register_pty: lib.func('void rdsparser_register_pty(void *rds, void *cb)'),
-  register_tp: lib.func('void rdsparser_register_tp(void *rds, void *cb)'),
-  register_ta: lib.func('void rdsparser_register_ta(void *rds, void *cb)'),
-  register_ms: lib.func('void rdsparser_register_ms(void *rds, void *cb)'),
-  register_ecc: lib.func('void rdsparser_register_ecc(void *rds, void *cb)'),
-  register_country: lib.func('void rdsparser_register_country(void *rds, void *cb)'),
-  register_af: lib.func('void rdsparser_register_af(void *rds, void *cb)'),
-  register_ps: lib.func('void rdsparser_register_ps(void *rds, void *cb)'),
-  register_rt: lib.func('void rdsparser_register_rt(void *rds, void *cb)'),
-  register_ptyn: lib.func('void rdsparser_register_ptyn(void *rds, void *cb)'),
-  register_ct: lib.func('void rdsparser_register_ct(void *rds, void *cb)'),
-  string_get_content: lib.func(unicode_type + '* rdsparser_string_get_content(void *string)'),
-  string_get_errors: lib.func('uint8_t* rdsparser_string_get_errors(void *string)'),
-  string_get_length: lib.func('uint8_t rdsparser_string_get_length(void *string)'),
-  ct_get_year: lib.func('uint16_t rdsparser_ct_get_year(void *ct)'),
-  ct_get_month: lib.func('uint8_t rdsparser_ct_get_month(void *ct)'),
-  ct_get_day: lib.func('uint8_t rdsparser_ct_get_day(void *ct)'),
-  ct_get_hour: lib.func('uint8_t rdsparser_ct_get_hour(void *ct)'),
-  ct_get_minute: lib.func('uint8_t rdsparser_ct_get_minute(void *ct)'),
-  ct_get_offset: lib.func('int8_t rdsparser_ct_get_offset(void *ct)'),
-  pty_lookup_short: lib.func('const char* rdsparser_pty_lookup_short(int8_t pty, bool rbds)'),
-  pty_lookup_long: lib.func('const char* rdsparser_pty_lookup_long(int8_t pty, bool rbds)'),
-  country_lookup_name: lib.func('const char* rdsparser_country_lookup_name(int country)'),
-  country_lookup_iso: lib.func('const char* rdsparser_country_lookup_iso(int country)')
-}
-
-const callbacks = {
-  pi: koffi.register(rds => (
-    value = rdsparser.get_pi(rds)
-    //console.log('PI: ' + value.toString(16).toUpperCase())
-  ), 'callback_pi*'),
-
-  pty: koffi.register(rds => (
-    value = rdsparser.get_pty(rds),
-    dataToSend.pty = value
-  ), 'callback_pty*'),
-
-  tp: koffi.register(rds => (
-    value = rdsparser.get_tp(rds),
-    dataToSend.tp = value
-  ), 'callback_tp*'),
-
-  ta: koffi.register(rds => (
-    value = rdsparser.get_ta(rds),
-    dataToSend.ta = value
-  ), 'callback_ta*'),
-
-  ms: koffi.register(rds => (
-    value = rdsparser.get_ms(rds),
-    dataToSend.ms = value
-  ), 'callback_ms*'),
-
-  af: koffi.register((rds, value) => (
-    dataToSend.af.push(value)
-  ), 'callback_af*'),
-
-  ecc: koffi.register(rds => (
-    value = rdsparser.get_ecc(rds),
-    dataToSend.ecc = value
-  ), 'callback_ecc*'),
-
-  country: koffi.register(rds => (
-    value = rdsparser.get_country(rds),
-    display = rdsparser.country_lookup_name(value),
-    iso = rdsparser.country_lookup_iso(value),
-    dataToSend.country_name = display,
-    dataToSend.country_iso = iso
-  ), 'callback_country*'),
-
-  ps: koffi.register(rds => (
-    ps = rdsparser.get_ps(rds),
-    dataToSend.ps = decode_unicode(ps),
-    dataToSend.ps_errors = decode_errors(ps)
-  ), 'callback_ps*'),
-
-  rt: koffi.register((rds, flag) => {
-    const rt = rdsparser.get_rt(rds, flag);
-
-    if (flag === 0) {
-      dataToSend.rt0 = decode_unicode(rt);
-      dataToSend.rt0_errors = decode_errors(rt);
-    }
-
-    if (flag === 1) {
-      dataToSend.rt1 = decode_unicode(rt);
-      dataToSend.rt1_errors = decode_errors(rt);
-    }
-    dataToSend.rt_flag = flag;
-  }, 'callback_rt*'),
-
-  ptyn: koffi.register((rds, flag) => (
-    value = decode_unicode(rdsparser.get_ptyn(rds))
-    /*console.log('PTYN: ' + value)*/
-  ), 'callback_ptyn*'),
-
-  ct: koffi.register((rds, ct) => (
-    year = rdsparser.ct_get_year(ct),
-    month = String(rdsparser.ct_get_month(ct)).padStart(2, '0'),
-    day = String(rdsparser.ct_get_day(ct)).padStart(2, '0'),
-    hour = String(rdsparser.ct_get_hour(ct)).padStart(2, '0'),
-    minute = String(rdsparser.ct_get_minute(ct)).padStart(2, '0'),
-    offset = rdsparser.ct_get_offset(ct),
-    tz_sign = (offset >= 0 ? '+' : '-'),
-    tz_hour = String(Math.abs(Math.floor(offset / 60))).padStart(2, '0'),
-    tz_minute = String(Math.abs(offset % 60)).padStart(2, '0')
-    //console.log('CT: ' + year + '-' + month + '-' + day + ' ' + hour + ':' + minute + ' (' + tz_sign + tz_hour + ':' + tz_minute + ')')
-  ), 'callback_ct*')
-};
-
-let rds = rdsparser.new()
-rdsparser.set_text_correction(rds, 0, 0, 2);
-rdsparser.set_text_correction(rds, 0, 1, 2);
-rdsparser.set_text_correction(rds, 1, 0, 2);
-rdsparser.set_text_correction(rds, 1, 1, 2);
-rdsparser.set_text_progressive(rds, 0, 1)
-rdsparser.set_text_progressive(rds, 1, 1)
-rdsparser.register_pi(rds, callbacks.pi);
-rdsparser.register_pty(rds, callbacks.pty);
-rdsparser.register_tp(rds, callbacks.tp);
-rdsparser.register_ta(rds, callbacks.ta);
-rdsparser.register_ms(rds, callbacks.ms);
-rdsparser.register_ecc(rds, callbacks.ecc);
-rdsparser.register_country(rds, callbacks.country);
-rdsparser.register_af(rds, callbacks.af);
-rdsparser.register_ps(rds, callbacks.ps);
-rdsparser.register_rt(rds, callbacks.rt);
-rdsparser.register_ptyn(rds, callbacks.ptyn);
-rdsparser.register_ct(rds, callbacks.ct);
-
-const decode_unicode = function(string) {
-    let length = rdsparser.string_get_length(string);
-    if (length) {
-      let content = rdsparser.string_get_content(string);
-      let array = koffi.decode(content, unicode_type + ' [' + length + ']');
-      return String.fromCodePoint.apply(String, array);
-    }
-    return '';
-};
-
-const decode_errors = function(string) {
-    let length = rdsparser.string_get_length(string);
-    if (length) {
-      let errors = rdsparser.string_get_errors(string);
-      let array = koffi.decode(errors, 'uint8_t [' + length + ']');
-      return Uint8Array.from(array).toString();
-    }
-    return '';
-};
-
 const updateInterval = 75;
 
 // Initialize the data object
@@ -229,7 +23,9 @@ var dataToSend = {
   ecc: null,
   af: [],
   rt0: '',
+  rt0_errors: '',
   rt1: '',
+  rt1_errors: '',
   rt_flag: '',
   ims: 0,
   eq: 0,
@@ -251,6 +47,8 @@ var dataToSend = {
   users: 0,
 };
 
+const rds = new RDSDecoder(dataToSend);
+
 const filterMappings = {
   'G11': { eq: 1, ims: 1 },
   'G01': { eq: 0, ims: 1 },
@@ -283,7 +81,7 @@ function rdsReceived() {
 function rdsReset() {
   resetToDefault(dataToSend);
   dataToSend.af.length = 0;
-  rdsparser.clear(rds);
+  rds.clear();
   if (rdsTimeoutTimer) {
     clearTimeout(rdsTimeoutTimer);
     rdsTimeoutTimer = null;
@@ -400,11 +198,18 @@ function handleData(wss, receivedData, rdsWss) {
           data += (((errors & 0x03) == 0) ? modifiedData.slice(12, 16) : '----');
 
           const newDataString = "G:\r\n" + data + "\r\n\r\n";
-          const finalBuffer = Buffer.from(newDataString, 'utf-8');
+          client.send(newDataString);
-          client.send(finalBuffer);
         });
 
-        rdsparser.parse_string(rds, modifiedData);
+        var data2 = "";
+        for(var i = 0; i < modifiedData.length; i++) {
+          data2 += modifiedData[i]
+          if ((i + 1) % 4 === 0 && i !== modifiedData.length - 1) data2 += " ";
+        }
+        var data = [];
+        data2.split(" ").forEach((i) => {data.push(parseInt(i, 16))})
+        
+        rds.decodeGroup(data[0], data[1], data[2], data[3], data[4])
         legacyRdsPiBuffer = null;
         break;
     }

server/rds.js

@@ -0,0 +1,175 @@
+const { rdsEccLookup, iso, countries } = require("./rds_country.js")
+
+class RDSDecoder {
+  constructor(data) {
+    this.data = data;
+    this.clear()
+  }
+
+  clear() {
+    this.data.pi = '?';
+    this.ps = Array(8).fill(' ');
+    this.ps_errors = Array(8).fill("0");
+    this.rt0 = Array(64).fill(' ');
+    this.rt0_errors = Array(64).fill("0");
+    this.rt1 = Array(64).fill(' ');
+    this.rt1_errors = Array(64).fill("0");
+    this.data.ps = '';
+    this.data.rt1 = '';
+    this.data.rt0 = '';
+    this.data.pty = 0;
+    this.data.tp = 0;
+    this.data.ta = 0;
+    this.data.ms = -1;
+    this.data.rt_flag = 0;
+    this.rt1_to_clear = false;
+    this.rt0_to_clear = false;
+    this.data.ecc = null;
+    this.data.country_name = ""
+    this.data.country_iso = "UN"
+
+    this.af_len = 0;
+    this.data.af = []
+    this.af_am_follows = false;
+  }
+
+  decodeGroup(blockA, blockB, blockC, blockD, error) {
+    if(error > 2) return; // TODO: handle errors
+    // console.log(error)
+    this.data.pi = blockA.toString(16).toUpperCase().padStart(4, '0');
+
+    const group = (blockB >> 12) & 0xF;
+    const version = (blockB >> 11) & 0x1;
+    this.data.tp = Number((blockB >> 10) & 1);
+    this.data.pty = (blockB >> 5) & 0b11111;
+
+    if (group === 0) {
+        this.data.ta = (blockB >> 4) & 1;
+        this.data.ms = (blockB >> 3) & 1;
+
+        if(version === 0) {
+            var af_high = blockC >> 8;
+            var af_low = blockC & 0xFF;
+            var BASE = 224;
+            var FILLER = 205;
+            var AM_FOLLOWS = 250;
+
+            if(af_high >= BASE && af_high <= (BASE+25)) {
+                this.af_len = af_high-BASE;
+                if(this.af_len !== this.data.af.length)  {
+                    this.data.af = [];
+                    this.af_am_follows = false;
+
+                    if(af_low != FILLER && af_low != AM_FOLLOWS) this.data.af.push((af_low+875)*100)
+                    else if(af_low == AM_FOLLOWS) this.af_am_follows = true;
+                }
+            } else if(this.data.af.length != this.af_len) {
+                if(!(af_high == AM_FOLLOWS || this.af_am_follows)) {
+                    var freq = (af_high+875)*100;
+                    if(!this.data.af.includes(freq)) this.data.af.push(freq);
+                }
+                if(this.af_am_follows) this.af_am_follows = false;
+                if(!(af_high == AM_FOLLOWS || af_low == FILLER || af_low == AM_FOLLOWS)) {
+                    var freq = (af_low+875)*100;
+                    if(!this.data.af.includes(freq)) this.data.af.push(freq);
+                }
+                if(af_low == AM_FOLLOWS) this.af_am_follows = true;
+            }
+        }
+
+        const idx = blockB & 0x3;
+        this.ps[idx * 2] = String.fromCharCode(blockD >> 8);
+        this.ps[idx * 2 + 1] = String.fromCharCode(blockD & 0xFF);
+        this.ps_errors[idx * 2] = error;
+        this.ps_errors[idx * 2 + 1] = error;
+        this.data.ps = this.ps.join('');
+        this.data.ps_errors = this.ps_errors.join(',');
+    } else if (group === 1 && version === 0) {
+        var la = Boolean(blockC & 0x8000);
+        var variant_code = (blockC >> 12) & 0x7;
+        switch (variant_code) {
+            case 0:
+                this.data.ecc = blockC & 0xff;
+                this.data.country_name = rdsEccLookup(blockA, this.data.ecc);
+                if(this.data.country_name.length === 0) this.data.country_iso = "UN";
+                else this.data.country_iso = iso[countries.indexOf(this.data.country_name)]
+                break;
+            default:
+                break;
+        }
+    } else if (group === 2) {
+        const idx = blockB & 0b1111;
+        this.rt_ab = Boolean((blockB >> 4) & 1);
+        // TODO: rt_errors
+        if(this.rt_ab) {
+            if(this.rt1_to_clear) {
+                this.rt1 = Array(64).fill(' ');
+                this.rt1_errors = Array(64).fill("0");
+                this.rt1_to_clear = false;
+            }
+
+            if(version == 0) {
+                this.rt1[idx * 4]     = String.fromCharCode(blockC >> 8);
+                this.rt1[idx * 4 + 1] = String.fromCharCode(blockC & 0xFF);
+                this.rt1[idx * 4 + 2] = String.fromCharCode(blockD >> 8);
+                this.rt1[idx * 4 + 3] = String.fromCharCode(blockD & 0xFF);
+                this.rt1_errors[idx * 4] = error;
+                this.rt1_errors[idx * 4 + 1] = error;
+                this.rt1_errors[idx * 4 + 2] = error;
+                this.rt1_errors[idx * 4 + 3] = error;
+            } else {
+                this.rt1[idx * 2]     = String.fromCharCode(blockD >> 8);
+                this.rt1[idx * 2 + 1] = String.fromCharCode(blockD & 0xFF);
+                this.rt1_errors[idx * 2] = error;
+                this.rt1_errors[idx * 2 + 1] = error;
+            }
+
+            var i = this.rt1.indexOf("\r")
+            while(i != -1) {
+                this.rt1[i] = " ";
+                i = this.rt1.indexOf("\r");
+            }
+
+            this.data.rt1 = this.rt1.join('');
+            this.data.rt1_errors = this.rt1_errors.join(',');
+            this.data.rt_flag = 1;
+            this.rt0_to_clear = true;
+        } else {
+            if(this.rt0_to_clear) {
+                this.rt0 = Array(64).fill(' ');
+                this.rt0_errors = Array(64).fill("0");
+                this.rt0_to_clear = false;
+            }
+            if(version == 0) {
+                this.rt0[idx * 4]     = String.fromCharCode(blockC >> 8);
+                this.rt0[idx * 4 + 1] = String.fromCharCode(blockC & 0xFF);
+                this.rt0[idx * 4 + 2] = String.fromCharCode(blockD >> 8);
+                this.rt0[idx * 4 + 3] = String.fromCharCode(blockD & 0xFF);
+                this.rt0_errors[idx * 4] = error;
+                this.rt0_errors[idx * 4 + 1] = error;
+                this.rt0_errors[idx * 4 + 2] = error;
+                this.rt0_errors[idx * 4 + 3] = error;
+            } else {
+                this.rt0[idx * 2]     = String.fromCharCode(blockD >> 8);
+                this.rt0[idx * 2 + 1] = String.fromCharCode(blockD & 0xFF);
+                this.rt0_errors[idx * 2] = error;
+                this.rt0_errors[idx * 2 + 1] = error;
+            }
+
+            var i = this.rt0.indexOf("\r");
+            while(i != -1) {
+                this.rt0[i] = " ";
+                i = this.rt0.indexOf("\r");
+            }
+
+            this.data.rt0 = this.rt0.join('');
+            this.data.rt0_errors = this.rt0_errors.join(',');
+            this.data.rt_flag = 0;
+            this.rt1_to_clear = true;
+        }
+    } else {
+        // console.log(group, version)
+    }
+  }
+}
+module.exports = RDSDecoder;

server/rds_country.js

@@ -0,0 +1,632 @@
+var countries = [
+        "Albania",
+    "Estonia",
+    "Algeria",
+    "Ethiopia",
+    "Andorra",
+    "Angola",
+    "Finland",
+    "Armenia",
+    "France",
+    "Ascension Island",
+    "Gabon",
+    "Austria",
+    "Gambia",
+    "Azerbaijan",
+    "Georgia",
+    "Germany",
+    "Bahrein",
+    "Ghana",
+    "Belarus",
+    "Gibraltar",
+    "Belgium",
+    "Greece",
+    "Benin",
+    "Guinea",
+    "Bosnia Herzegovina",
+    "Guinea-Bissau",
+    "Botswana",
+    "Hungary",
+    "Bulgaria",
+    "Iceland",
+    "Burkina Faso",
+    "Iraq",
+    "Burundi",
+    "Ireland",
+    "Cabinda",
+    "Israel",
+    "Cameroon",
+    "Italy",
+    "Jordan",
+    "Cape Verde",
+    "Kazakhstan",
+    "Central African Republic",
+    "Kenya",
+    "Chad",
+    "Kosovo",
+    "Comoros",
+    "Kuwait",
+    "DR Congo",
+    "Kyrgyzstan",
+    "Republic of Congo",
+    "Latvia",
+    "Cote d'Ivoire",
+    "Lebanon",
+    "Croatia",
+    "Lesotho",
+    "Cyprus",
+    "Liberia",
+    "Czechia",
+    "Libya",
+    "Denmark",
+    "Liechtenstein",
+    "Djiboutia",
+    "Lithuania",
+    "Egypt",
+    "Luxembourg",
+    "Equatorial Guinea",
+    "Macedonia",
+    "Eritrea",
+    "Madagascar",
+    "Seychelles",
+    "Malawi",
+    "Sierra Leone",
+    "Mali",
+    "Slovakia",
+    "Malta",
+    "Slovenia",
+    "Mauritania",
+    "Somalia",
+    "Mauritius",
+    "South Africa",
+    "Moldova",
+    "South Sudan",
+    "Monaco",
+    "Spain",
+    "Mongolia",
+    "Sudan",
+    "Montenegro",
+    "Swaziland",
+    "Morocco",
+    "Sweden",
+    "Mozambique",
+    "Switzerland",
+    "Namibia",
+    "Syria",
+    "Netherlands",
+    "Tajikistan",
+    "Niger",
+    "Tanzania",
+    "Nigeria",
+    "Togo",
+    "Norway",
+    "Tunisia",
+    "Oman",
+    "Turkey",
+    "Palestine",
+    "Turkmenistan",
+    "Poland",
+    "Uganda",
+    "Portugal",
+    "Ukraine",
+    "Qatar",
+    "United Arab Emirates",
+    "Romania",
+    "United Kingdom",
+    "Russia",
+    "Uzbekistan",
+    "Rwanda",
+    "Vatican",
+    "San Marino",
+    "Western Sahara",
+    "Sao Tome and Principe",
+    "Yemen",
+    "Saudi Arabia",
+    "Zambia",
+    "Senegal",
+    "Zimbabwe",
+    "Serbia",
+    "Anguilla",
+    "Guyana",
+    "Antigua and Barbuda",
+    "Haiti",
+    "Argentina",
+    "Honduras",
+    "Aruba",
+    "Jamaica",
+    "Bahamas",
+    "Martinique",
+    "Barbados",
+    "Mexico",
+    "Belize",
+    "Montserrat",
+    "Brazil/Bermuda",
+    "Brazil/AN",
+    "Bolivia",
+    "Nicaragua",
+    "Brazil",
+    "Panama",
+    "Canada",
+    "Paraguay",
+    "Cayman Islands",
+    "Peru",
+    "Chile",
+    "USA/VI/PR",
+    "Colombia",
+    "St. Kitts",
+    "Costa Rica",
+    "St. Lucia",
+    "Cuba",
+    "St. Pierre and Miquelon",
+    "Dominica",
+    "St. Vincent",
+    "Dominican Republic",
+    "Suriname",
+    "El Salvador",
+    "Trinidad and Tobago",
+    "Turks and Caicos islands",
+    "Falkland Islands",
+    "Greenland",
+    "Uruguay",
+    "Grenada",
+    "Venezuela",
+    "Guadeloupe",
+    "Virgin Islands",
+    "Guatemala",
+    "Afghanistan",
+    "South Korea",
+    "Laos",
+    "Australia Capital Territory",
+    "Macao",
+    "Australia New South Wales",
+    "Malaysia",
+    "Australia Victoria",
+    "Maldives",
+    "Australia Queensland",
+    "Marshall Islands",
+    "Australia South Australia",
+    "Micronesia",
+    "Australia Western Australia",
+    "Myanmar",
+    "Australia Tasmania",
+    "Nauru",
+    "Australia Northern Territory",
+    "Nepal",
+    "Bangladesh",
+    "New Zealand",
+    "Bhutan",
+    "Pakistan",
+    "Brunei Darussalam",
+    "Papua New Guinea",
+    "Cambodia",
+    "Philippines",
+    "China",
+    "Samoa",
+    "Singapore",
+    "Solomon Islands",
+    "Fiji",
+    "Sri Lanka",
+    "Hong Kong",
+    "Taiwan",
+    "India",
+    "Thailand",
+    "Indonesia",
+    "Tonga",
+    "Iran",
+    "Vanuatu",
+    "Japan",
+    "Vietnam",
+    "Kiribati",
+    "North Korea",
+    "Brazil/Equator"
+]
+
+var iso = [
+        "AL",
+    "EE",
+    "DZ",
+    "ET",
+    "AD",
+    "AO",
+    "FI",
+    "AM",
+    "FR",
+    "SH",
+    "GA",
+    "AT",
+    "GM",
+    "AZ",
+    "GE",
+    "DE",
+    "BH",
+    "GH",
+    "BY",
+    "GI",
+    "BE",
+    "GR",
+    "BJ",
+    "GN",
+    "BA",
+    "GW",
+    "BW",
+    "HU",
+    "BG",
+    "IS",
+    "BF",
+    "IQ",
+    "BI",
+    "IE",
+    "--",
+    "IL",
+    "CM",
+    "IT",
+    "JO",
+    "CV",
+    "KZ",
+    "CF",
+    "KE",
+    "TD",
+    "XK",
+    "KM",
+    "KW",
+    "CD",
+    "KG",
+    "CG",
+    "LV",
+    "CI",
+    "LB",
+    "HR",
+    "LS",
+    "CY",
+    "LR",
+    "CZ",
+    "LY",
+    "DK",
+    "LI",
+    "DJ",
+    "LT",
+    "EG",
+    "LU",
+    "GQ",
+    "MK",
+    "ER",
+    "MG",
+    "SC",
+    "MW",
+    "SL",
+    "ML",
+    "SK",
+    "MT",
+    "SI",
+    "MR",
+    "SO",
+    "MU",
+    "ZA",
+    "MD",
+    "SS",
+    "MC",
+    "ES",
+    "MN",
+    "SD",
+    "ME",
+    "SZ",
+    "MA",
+    "SE",
+    "MZ",
+    "CH",
+    "NA",
+    "SY",
+    "NL",
+    "TJ",
+    "NE",
+    "TZ",
+    "NG",
+    "TG",
+    "NO",
+    "TN",
+    "OM",
+    "TR",
+    "PS",
+    "TM",
+    "PL",
+    "UG",
+    "PT",
+    "UA",
+    "QA",
+    "AE",
+    "RO",
+    "GB",
+    "RU",
+    "UZ",
+    "RW",
+    "VA",
+    "SM",
+    "EH",
+    "ST",
+    "YE",
+    "SA",
+    "ZM",
+    "SN",
+    "ZW",
+    "RS",
+    "AI",
+    "GY",
+    "AG",
+    "HT",
+    "AR",
+    "HN",
+    "AW",
+    "JM",
+    "BS",
+    "MQ",
+    "BB",
+    "MX",
+    "BZ",
+    "MS",
+    "--",
+    "--",
+    "BO",
+    "NI",
+    "BR",
+    "PA",
+    "CA",
+    "PY",
+    "KY",
+    "PE",
+    "CL",
+    "--",
+    "CO",
+    "KN",
+    "CR",
+    "LC",
+    "CU",
+    "PM",
+    "DM",
+    "VC",
+    "DO",
+    "SR",
+    "SN",
+    "TT",
+    "TB",
+    "FK",
+    "GL",
+    "UY",
+    "GD",
+    "VE",
+    "GP",
+    "VG",
+    "GT",
+    "AF",
+    "KR",
+    "LA",
+    "AU",
+    "MO",
+    "AU",
+    "MY",
+    "AU",
+    "MV",
+    "AU",
+    "MH",
+    "AU",
+    "FM",
+    "AU",
+    "MM",
+    "AU",
+    "NR",
+    "AU",
+    "NP",
+    "BD",
+    "NZ",
+    "BT",
+    "PK",
+    "BN",
+    "PG",
+    "KH",
+    "PH",
+    "CN",
+    "WS",
+    "SG",
+    "SB",
+    "FJ",
+    "LK",
+    "HK",
+    "TW",
+    "IN",
+    "TH",
+    "ID",
+    "TO",
+    "IR",
+    "VU",
+    "JP",
+    "VN",
+    "KI",
+    "KP",
+    "--"
+]
+
+// RDS ECC Lookup Tables - Converted from C to JavaScript
+
+const rdsEccA0A6Lut = [
+  // A0
+  [
+    "USA/VI/PR", "USA/VI/PR", "USA/VI/PR", "USA/VI/PR", "USA/VI/PR",
+    "USA/VI/PR", "USA/VI/PR", "USA/VI/PR", "USA/VI/PR", "USA/VI/PR",
+    "USA/VI/PR", null, "USA/VI/PR", "USA/VI/PR", null
+  ],
+  // A1
+  [
+    null, null, null, null, null,
+    null, null, null, null, null,
+    "Canada", "Canada", "Canada", "Canada", "Greenland"
+  ],
+  // A2
+  [
+    "Anguilla", "Antigua and Barbuda", "Brazil/Equator", "Falkland Islands", "Barbados",
+    "Belize", "Cayman Islands", "Costa Rica", "Cuba", "Argentina",
+    "Brazil", "Brazil/Bermuda", "Brazil/AN", "Guadeloupe", "Bahamas"
+  ],
+  // A3
+  [
+    "Bolivia", "Colombia", "Jamaica", "Martinique", null,
+    "Paraguay", "Nicaragua", null, "Panama", "Dominica",
+    "Dominican Republic", "Chile", "Grenada", "Turks and Caicos islands", "Guyana"
+  ],
+  // A4
+  [
+    "Guatemala", "Honduras", "Aruba", null, "Montserrat",
+    "Trinidad and Tobago", "Peru", "Suriname", "Uruguay", "St. Kitts",
+    "St. Lucia", "El Salvador", "Haiti", "Venezuela", "Virgin Islands"
+  ],
+  // A5
+  [
+    null, null, null, null, null,
+    null, null, null, null, null,
+    "Mexico", "St. Vincent", "Mexico", "Mexico", "Mexico"
+  ],
+  // A6
+  [
+    null, null, null, null, null,
+    null, null, null, null, null,
+    null, null, null, null, "St. Pierre and Miquelon"
+  ]
+];
+
+const rdsEccD0D4Lut = [
+  // D0
+  [
+    "Cameroon", "Central African Republic", "Djiboutia", "Madagascar", "Mali",
+    "Angola", "Equatorial Guinea", "Gabon", "Guinea", "South Africa",
+    "Burkina Faso", "Republic of Congo", "Togo", "Benin", "Malawi"
+  ],
+  // D1
+  [
+    "Namibia", "Liberia", "Ghana", "Mauritania", "Sao Tome and Principe",
+    "Cape Verde", "Senegal", "Gambia", "Burundi", "Ascension Island",
+    "Botswana", "Comoros", "Tanzania", "Ethiopia", "Nigeria"
+  ],
+  // D2
+  [
+    "Sierra Leone", "Zimbabwe", "Mozambique", "Uganda", "Swaziland",
+    "Kenya", "Somalia", "Niger", "Chad", "Guinea-Bissau",
+    "DR Congo", "Cote d'Ivoire", null, "Zambia", "Eritrea"
+  ],
+  // D3
+  [
+    null, null, "Western Sahara", "Cabinda", "Rwanda",
+    "Lesotho", null, "Seychelles", null, "Mauritius",
+    null, "Sudan", null, null, null
+  ],
+  // D4
+  [
+    null, null, null, null, null,
+    null, null, null, null, "South Sudan",
+    null, null, null, null, null
+  ]
+];
+
+const rdsEccE0E5Lut = [
+  // E0
+  [
+    "Germany", "Algeria", "Andorra", "Israel", "Italy",
+    "Belgium", "Russia", "Palestine", "Albania", "Austria",
+    "Hungary", "Malta", "Germany", null, "Egypt"
+  ],
+  // E1
+  [
+    "Greece", "Cyprus", "San Marino", "Switzerland", "Jordan",
+    "Finland", "Luxembourg", "Bulgaria", "Denmark", "Gibraltar",
+    "Iraq", "United Kingdom", "Libya", "Romania", "France"
+  ],
+  // E2
+  [
+    "Morocco", "Czechia", "Poland", "Vatican", "Slovakia",
+    "Syria", "Tunisia", null, "Liechtenstein", "Iceland",
+    "Monaco", "Lithuania", "Serbia", "Spain", "Norway"
+  ],
+  // E3
+  [
+    "Montenegro", "Ireland", "Turkey", null, "Tajikistan",
+    null, null, "Netherlands", "Latvia", "Lebanon",
+    "Azerbaijan", "Croatia", "Kazakhstan", "Sweden", "Belarus"
+  ],
+  // E4
+  [
+    "Moldova", "Estonia", "Macedonia", null, null,
+    "Ukraine", "Kosovo", "Portugal", "Slovenia", "Armenia",
+    "Uzbekistan", "Georgia", null, "Turkmenistan", "Bosnia Herzegovina"
+  ],
+  // E5
+  [
+    null, null, "Kyrgyzstan", null, null,
+    null, null, null, null, null,
+    null, null, null, null, null
+  ]
+];
+
+const rdsEccF0F4Lut = [
+  // F0
+  [
+    "Australia Capital Territory", "Australia New South Wales", "Australia Victoria", "Australia Queensland", "Australia South Australia",
+    "Australia Western Australia", "Australia Tasmania", "Australia Northern Territory", "Saudi Arabia", "Afghanistan",
+    "Myanmar", "China", "North Korea", "Bahrein", "Malaysia"
+  ],
+  // F1
+  [
+    "Kiribati", "Bhutan", "Bangladesh", "Pakistan", "Fiji",
+    "Oman", "Nauru", "Iran", "New Zealand", "Solomon Islands",
+    "Brunei Darussalam", "Sri Lanka", "Taiwan", "South Korea", "Hong Kong"
+  ],
+  // F2
+  [
+    "Kuwait", "Qatar", "Cambodia", "Samoa", "India",
+    "Macao", "Vietnam", "Philippines", "Japan", "Singapore",
+    "Maldives", "Indonesia", "United Arab Emirates", "Nepal", "Vanuatu"
+  ],
+  // F3
+  [
+    "Laos", "Thailand", "Tonga", null, null,
+    null, null, "China", "Papua New Guinea", null,
+    "Yemen", null, null, "Micronesia", "Mongolia"
+  ],
+  // F4
+  [
+    null, null, null, null, null,
+    null, null, null, "China", null,
+    "Marshall Islands", null, null, null, null
+  ]
+];
+
+function rdsEccLookup(pi, ecc) {
+  const PI_UNKNOWN = -1;
+  
+  const piCountry = (pi >> 12) & 0xF;
+  
+  if (pi === PI_UNKNOWN || piCountry === 0) {
+    return ""
+  }
+  
+  const piId = piCountry - 1;
+  
+  const eccRanges = [
+    { min: 0xA0, max: 0xA6, lut: rdsEccA0A6Lut },
+    { min: 0xD0, max: 0xD4, lut: rdsEccD0D4Lut },
+    { min: 0xE0, max: 0xE5, lut: rdsEccE0E5Lut },
+    { min: 0xF0, max: 0xF4, lut: rdsEccF0F4Lut }
+  ];
+  
+  // Check each range
+  for (const range of eccRanges) {
+    if (ecc >= range.min && ecc <= range.max) {
+      const eccId = ecc - range.min;
+      return range.lut[eccId][piId];
+    }
+  }
+  
+  return ""
+}
+
+module.exports = {
+    rdsEccLookup,
+    iso,
+    countries
+};