chore: integrate cppcheck into workflow

lsm/include/lsm/bt.h

@@ -28,7 +28,7 @@ void lsm_bt_clear(lsm_bt *bt);
 /**
  * Return the size of the binary tree
  */
-uint64_t lsm_bt_size(lsm_bt *bt);
+uint64_t lsm_bt_size(const lsm_bt *bt);
 
 /**
  * Search for the data stored behind the given key.

lsm/include/lsm/store.h

@@ -117,7 +117,7 @@ lsm_error lsm_store_init(lsm_store **ptr);
  * @param store store to use
  * @return how many elements are in the store
  */
-uint64_t lsm_store_size(lsm_store *store);
+uint64_t lsm_store_size(const lsm_store *store);
 
 /**
  * Open the given database file and load it into a new store object.

lsm/include/lsm/str.h

@@ -34,7 +34,7 @@ lsm_error lsm_str_init_zero(lsm_str **ptr);
  * @param ptr pointer to store newly allocated pointer
  * @param s string to copy into lsm string
  */
-lsm_error lsm_str_init_copy(lsm_str **ptr, char *s);
+lsm_error lsm_str_init_copy(lsm_str **ptr, const char *s);
 
 /**
  * Same as `lsm_str_init_copy`, except that it takes an additional argument
@@ -45,7 +45,7 @@ lsm_error lsm_str_init_copy(lsm_str **ptr, char *s);
  * @param s string to copy into lsm string
  * @param len length of string to copy
  */
-lsm_error lsm_str_init_copy_n(lsm_str **ptr, char *s, uint64_t len);
+lsm_error lsm_str_init_copy_n(lsm_str **ptr, const char *s, uint64_t len);
 
 /**
  * Overwrite an existing lsm_str so it now represents the new provided string.
@@ -65,7 +65,7 @@ void lsm_str_overwrite(lsm_str *str, char *s);
  * @param str lsm_str object to modify
  * @param s string to copy into lsm string
  */
-lsm_error lsm_str_overwrite_copy(lsm_str *str, char *s);
+lsm_error lsm_str_overwrite_copy(lsm_str *str, const char *s);
 
 /**
  * Same as `lsm_str_overwrite_copy`, except the length is explicitely specified,
@@ -75,7 +75,7 @@ lsm_error lsm_str_overwrite_copy(lsm_str *str, char *s);
  * @param s string to copy into lsm string
  * @param len length of the string to copy
  */
-lsm_error lsm_str_overwrite_copy_n(lsm_str *str, char *s, uint64_t len);
+lsm_error lsm_str_overwrite_copy_n(lsm_str *str, const char *s, uint64_t len);
 
 /**
  * Deallocate the existing internal string if needed and replace the lsm_str
@@ -99,7 +99,7 @@ void lsm_str_free(lsm_str *str);
  *
  * @param str string to return length for.
  */
-uint64_t lsm_str_len(lsm_str *str);
+uint64_t lsm_str_len(const lsm_str *str);
 
 /**
  * Return a pointer to the string's underlying char array. Note that this array

lsm/include/lsm/trie.h

@@ -55,6 +55,6 @@ lsm_error lsm_trie_remove(void **data, lsm_trie *trie, lsm_str *key);
  *
  * @param trie trie to return size for
  */
-uint64_t lsm_trie_size(lsm_trie *trie);
+uint64_t lsm_trie_size(const lsm_trie *trie);
 
 #endif