made functions static

1 files changed, 4 insertions, 2 deletions

diff --git a/strbst.c b/strbst.c
index b8b5dce..16c2e61 100644
--- a/strbst.c
+++ b/strbst.c
@@ -58,8 +58,10 @@ e   b   =>   a   c
     *bst = (*bst)->right; // tip = b
     (*bst)->left->right = flip;
 }
+// NOTE: These functions are valid because `b` is guaranteed in the
+// conditions where the rotations are called.
 
-int insnode(strbstnode** bst, strbstnode* new) {
+static int insnode(strbstnode** bst, strbstnode* new) {
     // returns height of right node minus height of left node ("bias")
     if (!*bst) { // When an empty node is reached,
         *bst = new; // place the node
@@ -96,7 +98,7 @@ void insbst(strbst* bst, char* ind, void* data) {
     insnode(&(bst->head), newbstnode(ind, data)); // allows recursion
 }
 
-void* querynode(strbstnode* node, char* ind){
+static void* querynode(strbstnode* node, char* ind){
     // tail-recursive finding algorithm
     if (!node) return NULL; // NULL => node not found
     int cmp = strcmp(ind, node->ind);