actually parsing grammar and generating a def.c file

1 files changed, 9 insertions, 1 deletions

diff --git a/util/arena.h b/util/arena.h
index 3d82b95..1142321 100644
--- a/util/arena.h
+++ b/util/arena.h
@@ -9,18 +9,26 @@ struct arena_ctx {
     size_t offset;
 };
 
+
 #define ARENA_CTX_INIT(buffer, sz) (struct arena_ctx){(buffer), (sz), 0}
 void *arena_allocate(struct arena_ctx *ctx, size_t sz);
 void arena_reset(struct arena_ctx *ctx);
 
 #ifdef ARENA_IMPLEMENTATION
+#define ARENA_ALLIGNMENT 2
 
+// #include <assert.h>
 void *arena_allocate(struct arena_ctx *ctx, size_t sz)
 {
+    if(sz % ARENA_ALLIGNMENT != 0)
+        sz += ARENA_ALLIGNMENT - (sz % ARENA_ALLIGNMENT);
+
     if(ctx->offset + sz > ctx->size) return NULL;
 
-    void *off = ctx->buffer + ctx->offset;
+    void *off = (void *)((intptr_t)ctx->buffer + ctx->offset);
     ctx->offset += sz;
+
+    // assert(((intptr_t)off & 0x1) == 0);
     return off;
 }