avoid c99-style comments in examples, fix missed VLA

src/examples/suspend_resume_epoll.c

@@ -74,7 +74,7 @@ ahc_echo (void *cls,
 
   if (-1 != req->timerfd)
   {
-    // send response (echo request url)
+    /* send response (echo request url) */
     response = MHD_create_response_from_buffer (strlen (url),
                                                 (void *) url,
                                                 MHD_RESPMEM_MUST_COPY);
@@ -86,7 +86,7 @@ ahc_echo (void *cls,
     MHD_destroy_response (response);
     return ret;
   }
-  // create timer and suspend connection
+  /* create timer and suspend connection */
   req->timerfd = timerfd_create(CLOCK_MONOTONIC, TFD_NONBLOCK);
   if (-1 == req->timerfd)
     {
@@ -183,24 +183,24 @@ main (int argc,
     {
       if (events_list[0].data.ptr)
       {
-        // A timer has timed out
+        /*  A timer has timed out */
         req = events_list[0].data.ptr;
-        // read from the fd so the system knows we heard the notice
+        /* read from the fd so the system knows we heard the notice */
         if (-1 == read(req->timerfd, &timer_expirations, sizeof(timer_expirations)))
         {
           return 1;
         }
-        // Now resume the connection
+        /*  Now resume the connection */
         MHD_resume_connection(req->connection);
       }
     }
     else if (0 == current_event_count)
     {
-      // no events: continue
+      /* no events: continue */
     }
     else
     {
-      // error
+      /* error */
       return 1;
     }
     if (! MHD_run(d))

src/microhttpd/digestauth.c

@@ -59,6 +59,8 @@
  */
 #define MAX_DIGEST SHA256_DIGEST_SIZE
 
+#define MAX_NONCE NONCE_STD_LEN((MAX_DIGEST)+1)
+
 /**
  * Macro to avoid using VLAs if the compiler does not support them.
  */
@@ -69,6 +71,13 @@
  * @param n length of the digest to be used for a VLA
  */
 #define VLA_ARRAY_LEN_DIGEST(n) (((n) <= MAX_DIGEST?1:(mhd_panic(mhd_panic_cls, __FILE__, __LINE__, "VLA too big"),1)),MAX_DIGEST)
+
+/**
+ * Check that @a n is below #MAX_NONCE, then return #MAX_NONCE.
+ *
+ * @param n length of the digest to be used for a VLA
+ */
+#define VLA_ARRAY_LEN_NONCE(n) (((n) <= MAX_NONCE?1:(mhd_panic(mhd_panic_cls, __FILE__, __LINE__, "VLA too big"),1)),MAX_NONCE)
 #else
 /**
  * Check that @a n is below #MAX_DIGEST, then return @a n.
@@ -76,6 +85,13 @@
  * @param n length of the digest to be used for a VLA
  */
 #define VLA_ARRAY_LEN_DIGEST(n) (((n) <= MAX_DIGEST?1:(mhd_panic(mhd_panic_cls, __FILE__, __LINE__, "VLA too big"),1)),n)
+
+/**
+ * Check that @a n is below #MAX_NONCE, then return @a n.
+ *
+ * @param n length of the digest to be used for a VLA
+ */
+#define VLA_ARRAY_LEN_NONCE(n) (((n) <= MAX_NONCE?1:(mhd_panic(mhd_panic_cls, __FILE__, __LINE__, "VLA too big"),1)),n)
 #endif
 
 /**
@@ -1320,7 +1336,7 @@ MHD_queue_auth_fail_response2 (struct MHD_Connection *connection,
   SETUP_DA (algo, da);
 
   {
-    char nonce[NONCE_STD_LEN(da.digest_size) + 1];
+    char nonce[VLA_ARRAY_LEN_NONCE (NONCE_STD_LEN(da.digest_size) + 1)];
     /* Generating the server nonce */
     calculate_nonce ((uint32_t) MHD_monotonic_sec_counter(),
                      connection->method,

w32/common/MHD_config.h

@@ -10,7 +10,9 @@
 #define MSVC 1
 
 /* Define that MS VC does not support VLAs */
+#ifndef __clang__
 #define __STDC_NO_VLA__ 1
+#endif
 
 /* Define to 1 if your C compiler supports inline functions. */
 #define INLINE_FUNC 1