Fix parser bug. Add isnan(x) macro.

maximecb · Nov 12, 2023 · 62f8b97 · 62f8b97
1 parent 19d3f29
commit 62f8b97
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Showing 4 changed files with 20 additions and 3 deletions.
diff --git a/ncc/examples/mini_bbs.c b/ncc/examples/mini_bbs.c
@@ -141,11 +141,9 @@ void post_message(user_t* p_user)
     assert(num_messages <= MAX_MESSAGES);
     message_t* p_message = &messages[msg_idx];
 
+    // Initialize the message struct
     p_message->timestamp = time_current_ms();
-
     memcpy(p_message->username, p_user->name, MAX_NAME_LEN);
-
-    //p_user->msg_buf[MAX_MSG_LEN - 1] = '\0';
     memcpy(p_message->text, p_user->msg_buf, sizeof(p_user->msg_buf));
 }
 

diff --git a/ncc/include/math.h b/ncc/include/math.h
@@ -5,6 +5,9 @@
 #define M_PI_F 3.14159266f
 #define INFINITY_F (1.0f / 0.0f)
 
+// Test if a floating-point value is NaN
+#define isnan(x) (x != x)
+
 // Here we use macros for performance because
 // ncc doesn't yet support inline functions
 #define sinf(f) (asm (f) -> float { sin_f32; })

diff --git a/ncc/include/uvm/3dmath.h b/ncc/include/uvm/3dmath.h
@@ -58,6 +58,14 @@ void vec3_normalize(vec3 v)
     }
 }
 
+// Scalar multiplication
+void vec3_mul(vec3 a, float f, vec3 result)
+{
+    result[0] = a[1] * f;
+    result[1] = a[2] * f;
+    result[2] = a[0] * f;
+}
+
 // Compute the dot product of two vectors
 float vec3_dot(vec3 a, vec3 b)
 {

diff --git a/ncc/src/parser.rs b/ncc/src/parser.rs
@@ -210,6 +210,8 @@ fn parse_postfix(input: &mut Input) -> Result<Expr, ParseError>
                 base: Box::new(base_expr),
                 field: field_name
             };
+
+            continue;
         }
 
         // Postfix increment expression
@@ -1373,4 +1375,10 @@ mod tests
         parse_ok("void main() { if (1) { foo(); } }");
         parse_ok("void main() { if (1) { foo(); } else { bar(); } }");
     }
+
+    #[test]
+    fn regress_ptr_buf_idx()
+    {
+        parse_ok("void main(user_t* p_user) { p_user->msg_buf[0]; }");
+    }
 }