From 35db39c62aae3da177a063b30ba3434d74a02b90 Mon Sep 17 00:00:00 2001
From: Alexey Andreyev <aa13q@ya.ru>
Date: Fri, 20 Aug 2021 10:52:24 +0300
Subject: [PATCH] Fix snprintf usage when geohashing

Contributes to github issue #368.
---
 geohash.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/geohash.c b/geohash.c
index ffac1d1..87a54c4 100644
--- a/geohash.c
+++ b/geohash.c
@@ -112,8 +112,9 @@ char* get_neighbor(char *hash, int direction) {
     char **border = is_odd ? odd_borders : even_borders;
     char **neighbor = is_odd ? odd_neighbors : even_neighbors; 
     
-    char *base = malloc(sizeof(char) * (MAX_GEOHASH_LENGTH + 1));
-    snprintf(base, MAX_GEOHASH_LENGTH, "%s", hash);
+    size_t geohash_b_size = MAX_GEOHASH_LENGTH + 1;
+    char *base = malloc(sizeof(char) * geohash_b_size);
+    snprintf(base, geohash_b_size, "%s", hash);
     
 	if(index_for_char(last_char, border[direction]) != -1)
 		base = get_neighbor(base, direction);