base64 decoding for embedding image onto the src

.gitattributes

@@ -1,7 +1,10 @@
 *.psd filter=lfs diff=lfs merge=lfs -text
+*.kra filter=lfs diff=lfs merge=lfs -text
 *.ogg filter=lfs diff=lfs merge=lfs -text
 *.tga filter=lfs diff=lfs merge=lfs -text
 *.gz filter=lfs diff=lfs merge=lfs -text
 *.opus filter=lfs diff=lfs merge=lfs -text
 *.pdf filter=lfs diff=lfs merge=lfs -text
 *.zip filter=lfs diff=lfs merge=lfs -text
+*.bytes filter=lfs diff=lfs merge=lfs -text
+*.base64 filter=lfs diff=lfs merge=lfs -text

assets/JS_INIT.js

@@ -65,3 +65,47 @@ system.halt = function() {
     exit();
 };
 Object.freeze(system);
+// some utilities functions
+var base64 = {};
+base64._lookup = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+base64._revLookup = {"=":0,"A":0,"B":1,"C":2,"D":3,"E":4,"F":5,"G":6,"H":7,"I":8,"J":9,"K":10,"L":11,"M":12,"N":13,"O":14,"P":15,"Q":16,"R":17,"S":18,"T":19,"U":20,"V":21,"W":22,"X":23,"Y":24,"Z":25,"a":26,"b":27,"c":28,"d":29,"e":30,"f":31,"g":32,"h":33,"i":34,"j":35,"k":36,"l":37,"m":38,"n":39,"o":40,"p":41,"q":42,"r":43,"s":44,"t":45,"u":46,"v":47,"w":48,"x":49,"y":50,"z":51,"0":52,"1":53,"2":54,"3":55,"4":56,"5":57,"6":58,"7":59,"8":60,"9":61,"+":62,"/":63};
+base64.atobarr = function(base64str) {
+    var ret = [];
+    for (var i = 0; i < base64str.length; i += 4) {
+        var bits = (base64._revLookup[base64str.charAt(i)] << 18) | (base64._revLookup[base64str.charAt(i+1)] << 12) | (base64._revLookup[base64str.charAt(i+2)] << 6) | (base64._revLookup[base64str.charAt(i+3)]);
+        var pads = (base64str.charAt(i+2) == "=") ? 2 : ((base64str.charAt(i+3) == "=") ? 1 : 0);
+
+        ret.push((bits >> 16) & 255);
+        if (pads <= 1) ret.push((bits >> 8) & 255);
+        if (pads == 0) ret.push(bits & 255);
+    }
+    return ret;
+};
+base64.atob = function(base64str) {
+    var ret = "";
+    for (var i = 0; i < base64str.length; i += 4) {
+        var bits = (base64._revLookup[base64str.charAt(i)] << 18) | (base64._revLookup[base64str.charAt(i+1)] << 12) | (base64._revLookup[base64str.charAt(i+2)] << 6) | (base64._revLookup[base64str.charAt(i+3)]);
+        var pads = (base64str.charAt(i+2) == "=") ? 2 : ((base64str.charAt(i+3) == "=") ? 1 : 0);
+
+        ret += String.fromCharCode((bits >> 16) & 255);
+        if (pads <= 1) ret += String.fromCharCode((bits >> 8) & 255);
+        if (pads == 0) ret += String.fromCharCode(bits & 255);
+    }
+    return ret;
+};
+base64.btoa = function(bytes) {
+    if (typeof bytes == "string") {
+        for (var i = 0; i < bytes.length; i += 3) {
+
+        }
+    }
+    else if (Array.isArray(bytes)) {
+        for (var i = 0; i < bytes.length; i += 3) {
+
+        }
+    }
+    else {
+        throw "Unknown byte representation (with typeof "+typeof bytes+")";
+    }
+};
+Object.freeze(base64);

assets/tbas/basic.js

@@ -77,6 +77,14 @@ function BasicArr() {
         this.dimsize = dimsize;
     }
 }
+// Abstract Syntax Tree
+// creates empty tree node
+function BasicAST() {
+    this.depth = 0;
+    this.leaves = [];
+    this.value = undefined;
+    this.type = "null"; // literal, operator, variable, function
+}
 basicInterpreterStatus.gosubStack = [];
 basicInterpreterStatus.variables = {};
 basicInterpreterStatus.defuns = {};
@@ -108,6 +116,38 @@ basicFunctions._isSeparator = function(code) {
 basicFunctions._isOperator = function(code) {
     return (code == 0x21 || code == 0x23 || code == 0x25 || code == 0x2A || code == 0x2B || code == 0x2D || code == 0x2E || code == 0x2F || (code >= 0x3C && code <= 0x3E) || code == 0x5E || code == 0x7C);
 };
+basicFunctions._parseTokens = function(tokens, states) {
+    // a line has one of these forms:
+    // VARIABLE = LITERAL
+    // VARIABLE = FUNCTION ARGUMENTS
+    // FUNCTION
+    // FUNCTION ARGUMENTS --arguments may contain another function call
+    // "FOR" VARIABLE "=" ARGUMENT "TO" ARGUMENT
+    // "FOR" VARIABLE "=" ARGUMENT "TO" ARGUMENT "STEP" ARGUMENT
+    // "IF" EXPRESSION "THEN" EXPRESSION
+    // "IF" EXPRESSION "THEN" EXPRESSION "ELSE" EXPRESSION
+    // "IF" EXPRESSION "GOTO" ARGUMENT
+    // "IF" EXPRESSION "GOTO" ARGUMENT "ELSE" EXPRESSION
+    // "WHILE" EXPRESSION
+
+    var i, j, k;
+    var headWord = tokens[0].toLowerCase();
+    var treeHead = BasicAST();
+
+    // is this a builtin function?
+    if (typeof basicInterpreterStatus.builtin[headWord] != "undefined") {
+        treeHead.value = headWord;
+        treeHead.type = "function";
+
+        // find and mark position of separators
+        var separators = [];
+        for (i = 1; i < tokens.length; i++) if (states[i] == "sep") separators.push(i);
+
+        // parse and populate leaves
+        // TODO
+    }
+
+};
 // @returns: line number for the next command, normally (lnum + 1); if GOTO or GOSUB was met, returns its line number
 basicFunctions._interpretLine = function(lnum, cmd) {
     var _debugprintStateTransition = false;
@@ -350,6 +390,11 @@ basicFunctions._interpretLine = function(lnum, cmd) {
 
     // END TOKENISE
 
+    // PARSING (SYNTAX ANALYSIS)
+    var syntaxTree = basicFunctions._parseTokens(tokens, modes);
+    // END PARSING
+
+
     println(tokens.join("~"));
     println(modes.join(" "));
 

src/net/torvald/tsvm/VMGUI.kt

@@ -61,6 +61,7 @@ class VMGUI(val appConfig: LwjglApplicationConfiguration) : ApplicationAdapter()
 
         //val fr = FileReader("./assets/tvdos/command.js")
         val fr = FileReader("./assets/tbas/basic.js")
+        //val fr = FileReader("./assets/jscon.js")
         val prg = fr.readText()
         fr.close()