Merge pull request 'fix(#3): add null pointer checks before all libraw FFI calls' (#19) from fix/issue-3 into master

src/main.rs

@@ -257,45 +257,53 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
 }
 
 fn apply_image_parameters(lr: *mut libraw_data_t, args: &Args) {
+    if lr.is_null() {
+        eprintln!("Warning: libraw pointer is null, skipping parameter application");
+        return;
+    }
     unsafe {
         // Set various processing parameters based on user input
 
         // Apply exposure adjustment
-        if args.exposure != 0.0 {
+        if args.exposure != 0.0 && !lr.is_null() {
             libraw_set_bright(lr, args.exposure);
         }
 
         // Apply contrast (using highlight parameters for demonstration)
-        if args.contrast != 0 {
+        if args.contrast != 0 && !lr.is_null() {
             let value = args.contrast.min(100).max(-100) as c_int;
             libraw_set_highlight(lr, value);
         }
 
         // Apply highlights adjustment
-        if args.highlights != 0 {
+        if args.highlights != 0 && !lr.is_null() {
             let value = args.highlights.min(100).max(-100) as c_int;
             libraw_set_highlight(lr, value);
         }
 
         // Apply clarity (using noise reduction parameters)
-        if args.clarity != 0 {
+        if args.clarity != 0 && !lr.is_null() {
             let value = args.clarity.min(100).max(-100) as c_int;
             libraw_set_fbdd_noiserd(lr, value);
         }
 
         // Apply saturation
-        if args.saturation != 0 {
+        if args.saturation != 0 && !lr.is_null() {
             let value = 1.0 + args.saturation.min(100).max(-100) as f32 / 100.0;
             libraw_set_gamma(lr, 0, value); // Apply gamma adjustment to simulate saturation
         }
 
         // Set output color space (sRGB in this case)
+        if !lr.is_null() {
             libraw_set_output_color(lr, 1); // 1 = sRGB
+        }
 
         // Set output bits per sample
+        if !lr.is_null() {
             libraw_set_output_bps(lr, 8);
         }
     }
+}
 
 #[cfg(test)]
 mod tests {