tvdos app package wip

assets/disk0/home/appexec.js

@@ -0,0 +1,114 @@
+const filepath = exec_args[1]
+
+if (!filepath) {
+    println(`Usage: appexec path/to/application.app`)
+    return 0
+}
+
+const file = files.open(_G.shell.resolvePathInput(filepath).full)
+
+if (!file.exists) {
+    println("File not found.")
+    return 1
+}
+
+if (file.isDirectory) {
+    println("Not an app file.")
+    return 2
+}
+
+const filebytes = file.sread()
+
+
+// check magic
+if (filebytes.substring(0,4) != "\x7FApP") {
+    println("Not an app file.")
+    return 2
+}
+
+const endianness = filebytes.charCodeAt(4)
+const sectionComp = filebytes.charCodeAt(6)
+const sectionCount = filebytes.charCodeAt(7)
+const targetOS = filebytes.charCodeAt(8)
+
+const decompFun = (1 == sectionComp) ? (b) => gzip.decomp(b) : (b) => b
+const decompToPtrFun = (1 == sectionComp) ? (b, target) => gzip.decompTo(b, target) : TODO()
+
+if (targetOS != 1 && targetOS != 0) {
+    println("App is not an TVDOS executable.")
+    return 3
+}
+
+
+function strToInt48(str) {
+    let s = [...str].map(it=>it.charCodeAt(0))
+    return ((4294967296 + (s[0] << 40)) + (s[1] << 32) + (s[2] << 24) + (s[3] << 16) + (s[4] << 8) + s[5]) - 4294967296
+
+}
+function makeHash(length) {
+	let e = "YBNDRFG8EJKMCPQXOTLVWIS2A345H769"
+	let m = e.length
+	let s = ""
+	for (let i = 0; i < length; i++) {
+	    s += e[Math.floor(Math.random()*m)]
+	}
+    return s
+}
+
+const PATH_MOUNT = `$:/TMP/${makeHash(32)}/`
+
+// READ SECTIONS
+
+let sectionTable = []
+let rodata = {}
+
+for (let i = 0; i < sectionCount; i++) {
+    let sectName = filebytes.substring(16 * (i+1), 16 * (i+1) + 10).trimNull()
+    let sectOffset = strToInt48(filebytes.substring(16 * (i+1) + 10, 16 * (i+1) + 16))
+    sectionTable.push([sectName, sectOffset])
+}
+
+for (let i = 0; i < sectionTable.length - 1; i++) {
+    let [sectName, sectOffset] = sectionTable[i]
+    let nextSectOffset = sectionTable[i+1][1]
+
+    let uncompLen = strToInt48(filebytes.substring(sectOffset, sectOffset + 6))
+    let compPayload = filebytes.substring(sectOffset + 6, nextSectOffset)
+
+    if ("RODATA" == sectName) {
+        let rodataPtr = 0
+        while (rodataPtr < nextSectOffset - sectOffset) {
+            let labelLen = filebytes.charCodeAt(sectOffset + rodataPtr)
+            let label = filebytes.substring(sectOffset + rodataPtr + 1, sectOffset + rodataPtr + 1 + labelLen)
+            let payloadLen = strToInt48(filebytes.substring(sectOffset + rodataPtr + 1 + labelLen, sectOffset + rodataPtr + 1 + labelLen + 6))
+            let uncompLen = strToInt48(filebytes.substring(sectOffset + rodataPtr + 1 + labelLen + 6, sectOffset + rodataPtr + 1 + labelLen + 12))
+            let sectPayload = filebytes.substring(sectOffset + rodataPtr + 1 + labelLen + 12, sectOffset + rodataPtr + 1 + labelLen + 12 + payloadLen)
+
+
+            try {
+                let ptr = sys.malloc(uncompLen)
+                decompToPtrFun(sectPayload, ptr)
+                rodata[label] = ptr
+            }
+            catch (e) {
+                rodata[label] = null
+            }
+
+            decompFun(payload)
+
+            rodataPtr += 13 + labelLen + payloadLen
+        }
+    }
+    else if ("TEXT" == sectName) {
+        let program = String.fromCharCode.apply(null, decompFun(compPayload))
+
+        // inject RODATA map
+        let rodataSnippet = `const __RODATA=Object.freeze(${JSON.stringify(rodata)});`
+
+        files.open(PATH_MOUNT + "run.com").swrite(rodataSnippet+program)
+    }
+}
+
+_G.shell.execute(PATH_MOUNT + "run.com")
+
+// TODO delete PATH_MOUNT

assets/disk0/tvdos/TVDOS.SYS

@@ -51,7 +51,7 @@ class PmemFSfile {
         // Javascript array OR JVM byte[]
         else if (Array.isArray(bytes) || bytes.toString().startsWith("[B")) {
             this.data = ""
-            for (let i = 0; i < array.length; i++) {
+            for (let i = 0; i < bytes.length; i++) {
                 this.data += String.fromCharCode(bytes[i])
             }
         }