🚚 Fix crash when trying to read beyond last disk file

src/fileReader.c

@@ -33,7 +33,7 @@ void initFileReader(char path[], unsigned long offset) {
 
 
 //Reads the given amount of bytes from the file and writes them into the given buffer. Automatically opens next file if EOF is reached.
-void getBytes(uint8_t* buffer, unsigned long numBytes) {
+void getBytes(uint8_t* buffer, unsigned long numBytes, bool isLast) {
   uint8_t* bufferPosition = buffer;
   unsigned long remainingBytes = numBytes;
 
@@ -52,7 +52,8 @@ void getBytes(uint8_t* buffer, unsigned long numBytes) {
     remainingBytes -= availableBytes;
 
     //If we've reached end of file, close file and open next file
-    if (file.offset == file.size) {
+    //Unless we've reached the end, in that case don't open next file in case we've reached the end of the last disk
+    if (!isLast && file.offset == file.size) {
       openNextFile();
     }
   }

src/fileReader.h

@@ -4,4 +4,4 @@
 
 void initFileReader(char path[], unsigned long offset);
 
-void getBytes(uint8_t* buffer, unsigned long numBytes);
+void getBytes(uint8_t* buffer, unsigned long numBytes, bool isLast);

src/main.c

@@ -95,7 +95,7 @@ int main(int argc, char *argv[]) {
   while (remainingBytes > 0 || !hasReachedEnd) {
     if (needToRead) {
       chunkSize = min(BUFFER_SIZE - uncompressedPosition, remainingBytes);
-      getBytes(compressedChunk, chunkSize);
+      getBytes(compressedChunk, chunkSize, chunkSize == remainingBytes);
       remainingBytes -= chunkSize;
 
       //Decrypt file if it is encrypted