const params for arena allocation funcs

1 files changed, 7 insertions, 7 deletions

diff --git a/arena.h b/arena.h
index 5235204..e963752 100644
--- a/arena.h
+++ b/arena.h
@@ -23,8 +23,8 @@ Arena arena_init(size_t sz);
 void arena_free(Arena *a);
 void arena_reset(Arena *a);
 void *arena_alloc(Arena *a, size_t n, size_t align);
-void *arena_realloc(Arena *a, void *old, size_t oldsz, size_t newsz, size_t align);
-void *arena_concat(Arena *m, void *a, size_t asz, void *b, size_t bsz, size_t align);
+void *arena_realloc(Arena *a, const void *old, size_t oldsz, size_t newsz, size_t align);
+void *arena_concat(Arena *m, const void *a, size_t asz, const void *b, size_t bsz, size_t align);
 
 #define new(a, t)\
     memset(arena_alloc(a, sizeof(t), _Alignof(__typeof__(t))), 0, sizeof(t))
@@ -79,10 +79,10 @@ void *arena_alloc(Arena *a, size_t sz, size_t align) {
 	return p;
 }
 
-void *arena_realloc(Arena *a, void *old, size_t oldsz, size_t newsz, size_t align) {
+void *arena_realloc(Arena *a, const void *old, size_t oldsz, size_t newsz, size_t align) {
 	if (old == a->beg - oldsz) {
 		a->beg = (char*)old + newsz;
-		return old;
+		return (void*)old;
 	} else {
 		void *p = arena_alloc(a, newsz, align);
 		if (old) memcpy(p, old, oldsz);
@@ -90,11 +90,11 @@ void *arena_realloc(Arena *a, void *old, size_t oldsz, size_t newsz, size_t alig
 	}
 }
 
-void *arena_concat(Arena *m, void *a, size_t asz, void *b, size_t bsz, size_t align) {
+void *arena_concat(Arena *m, const void *a, size_t asz, const void *b, size_t bsz, size_t align) {
 	if (!asz)
-		return b;
+		return (void*)b;
 	if (!bsz || (char*)a + asz == b)
-		return a;
+		return (void*)a;
 	void *p = arena_realloc(m, a, asz, asz + bsz, align);
 	memcpy((char*)p + asz, b, bsz);
 	return p;