Declare read-only function parameters const

Author: cgzones

src/share/ratelimit.h

@@ -18,7 +18,7 @@ static inline void ratelimit_reset(RateLimit *rl) {
         rl->num = rl->begin = 0;
 }
 
-static inline bool ratelimit_configured(RateLimit *rl) {
+static inline bool ratelimit_configured(const RateLimit *rl) {
         return rl->interval > 0 && rl->burst > 0;
 }
 

src/share/stat-util.c

@@ -32,7 +32,7 @@ int is_dir(const char* path, bool follow) {
         return !!S_ISDIR(st.st_mode);
 }
 
-bool null_or_empty(struct stat *st) {
+bool null_or_empty(const struct stat *st) {
         assert(st);
 
         if (S_ISREG(st->st_mode) && st->st_size <= 0)

src/share/stat-util.h

@@ -12,7 +12,7 @@
 
 int is_dir(const char *path, bool follow);
 
-bool null_or_empty(struct stat *st) _pure_;
+bool null_or_empty(const struct stat *st) _pure_;
 
 int files_same(const char *filea, const char *fileb);