begin halot file verify

src/mode/sla/x_halot.js

@@ -0,0 +1,74 @@
+(function() {
+    if (!this.navigator && this.process && this.process.env) {
+        let fs = require('fs');
+        let args = process.argv.slice(2);
+        let file = args.shift();
+        let fpos = 0;
+        let view = new DataView(fs.readFileSync(file).buffer);
+
+        function skip(len) {
+            fpos += len;
+            return fpos;
+        }
+
+        function nextU8() {
+            return view.getUint8(fpos++);
+        }
+
+        function nextU16() {
+            let u32 = view.getUint16(fpos);
+            fpos += 2;
+            return u32;
+        }
+
+        function nextU32() {
+            let u32 = view.getUint32(fpos);
+            fpos += 4;
+            return u32;
+        }
+
+        function read_string(dbl) {
+            let len = nextU32();
+            let str = '';
+            while (--len > 0) {
+                if (dbl) {
+                    nextU8();
+                    len--;
+                }
+                str += String.fromCharCode(nextU8());
+            }
+            if (!dbl) {
+                fpos++;
+            }
+            return str;
+        }
+        console.log({
+            file,
+            magic: read_string(),
+            version: nextU16(),
+            model: read_string(),
+            layers: nextU16(),
+            res_x: nextU16(),
+            res_y: nextU16(),
+            height: nextU32(),
+            skip: skip(60),
+            thumb: skip(26914),
+            prev1: skip(168202),
+            prev2: skip(168202),
+            len_x: read_string(true),
+            len_y: read_string(true),
+            layer: read_string(true),
+            layer_light_on: nextU16(),
+            layer_light_off: nextU16(),
+            base_light_on: nextU16(),
+            base_layers: nextU16(),
+            base_lift_dist: nextU16(),
+            base_lift_speed: nextU16(),
+            layer_lift_dist: nextU16(),
+            layer_lift_speed: nextU16(),
+            down_speed: nextU16(),
+            base_light_pwm: nextU16(),
+            layer_light_pwm: nextU16(),
+        });
+    }
+}());