ewah: support platforms that require aligned reads

diff --git a/hash.h b/hash.h
index a8b0fbb5b502669f0e6f5db55e4573b8277c04d2..1d43ac0ba0120e947e40476946360efbdee80a93 100644 (file)
--- a/hash.h
+++ b/hash.h
@@ -28,9 +28,9 @@ struct hash_table {
        struct hash_table_entry *array;
 };
 
-extern void *lookup_hash(unsigned int hash, struct hash_table *table);
+extern void *lookup_hash(unsigned int hash, const struct hash_table *table);
 extern void **insert_hash(unsigned int hash, void *ptr, struct hash_table *table);
-extern int for_each_hash(struct hash_table *table, int (*fn)(void *));
+extern int for_each_hash(const struct hash_table *table, int (*fn)(void *, void *), void *data);
 extern void free_hash(struct hash_table *table);
 
 static inline void init_hash(struct hash_table *table)
@@ -40,4 +40,11 @@ static inline void init_hash(struct hash_table *table)
        table->array = NULL;
 }
 
+static inline void preallocate_hash(struct hash_table *table, unsigned int elts)
+{
+       assert(table->size == 0 && table->nr == 0 && table->array == NULL);
+       table->size = elts * 2;
+       table->array = xcalloc(sizeof(struct hash_table_entry), table->size);
+}
+
 #endif