saving seems to work

Author: kirjavascript

flex2.idea

@@ -26,6 +26,7 @@ check version in documentation tab (move code)
 logo
 add flex.json to sonic 2 disassembly
 counts for commands (wrap all in doAction, remove doAction from others)
+real command modes
 search (filter)
 have default as logo?
 input type = color
@@ -34,5 +35,4 @@ lil-g/gemini
 ====
 
 object collapse state persistance
-when saving asm, use the object name as the label name :D
 create new file | newFactory={(path)=>{}}

modules/formats/dplc.js

@@ -25,6 +25,9 @@ export function bufferToDPLCs(buffer, format) {
         const dplcOffset = headerOffset + headerSize;
         let sprites = [];
 
+        // prevent crashes from incorrectly read header
+        if (dplcQty > 0xFF) return;
+
         for (let i = 0; i < dplcQty; i++) {
             // convert each line to a binary string to easily extract properties
             const binStr = readBinary(data, dplcOffset + (dplcSize * i), dplcSize);

modules/formats/mapping.js

@@ -24,8 +24,11 @@ export function bufferToMappings(buffer, format) {
 
         const mappingQty = readN(data, headerOffset, headerSize);
         const mappingOffset = headerOffset + headerSize;
+
         let sprites = [];
 
+        if (mappingQty > 0xFF) return; // prevent crashes
+
         for (let i = 0; i < mappingQty; i++) {
             // convert each line to a binary string to easily extract properties
             const binStr = readBinary(data, mappingOffset + (mappingSize * i), mappingSize);

modules/formats/util.js

@@ -1,8 +1,9 @@
 export function getHeaders(data) {
-    let a = 0x7FFF; // ???
+    // https://github.com/sonicretro/SonLVL/blob/master/SonLVLAPI/LevelData.cs#L1466-L1481
+    let a = 0x7FFF; // headers are twos complement
     let headers = [];
-    for (let i = 0; i < data.length && i != a; i += 2) {
-        let header = readWord(data, i);
+    for (let i = 0; i < data.length && i < a; i += 2) {
+        let header = readWord(data, i) & 0x7FFF;
         headers.push(header);
         if (header < a && !(header == 0)) {
             a = header;