From 8319d207d0e87639c2328334d52f3114587dc48f Mon Sep 17 00:00:00 2001
From: Dnomd343 <i@343.re>
Date: Mon, 16 Jan 2023 20:56:30 +0800
Subject: [PATCH] update: using stack char array

---
 src/core/core.cc            | 22 +++++++++++-----------
 src/short_code/serialize.cc |  3 ++-
 2 files changed, 13 insertions(+), 12 deletions(-)

diff --git a/src/core/core.cc b/src/core/core.cc
index 1c54c1b..9b71b39 100644
--- a/src/core/core.cc
+++ b/src/core/core.cc
@@ -35,6 +35,17 @@
 
 ////////////////////////////////////////
 
+#define RELEASE(NEXT_CODE, FILTER) \
+cache_t next_case = { \
+    .code = NEXT_CODE, \
+    .mask = F_1x1 << next_addr, \
+    .filter = FILTER, \
+    .addr = next_addr \
+}; \
+cache_insert(next_case);
+
+////////////////////////////////////////
+
 #define BFS_INIT \
 int next_addr; \
 int current = 0; \
@@ -49,17 +60,6 @@ int filter = cache[current++].filter;
 
 ////////////////////////////////////////
 
-#define RELEASE(NEXT_CODE, FILTER) \
-cache_t next_case = { \
-    .code = NEXT_CODE, \
-    .mask = F_1x1 << next_addr, \
-    .filter = FILTER, \
-    .addr = next_addr \
-}; \
-cache_insert(next_case);
-
-////////////////////////////////////////
-
 inline void Core::cache_insert(Core::cache_t &next_case) { // try to insert into cache
     auto *cache_ptr = cache;
     for (; cache_ptr < cache + cache_size; ++cache_ptr) {
diff --git a/src/short_code/serialize.cc b/src/short_code/serialize.cc
index f26c221..2e91991 100644
--- a/src/short_code/serialize.cc
+++ b/src/short_code/serialize.cc
@@ -8,7 +8,8 @@ ShortCode ShortCode::from_string(const std::string &short_code) {
 
 std::string ShortCode::to_string() const { // encode as 5-bits string
     uint32_t short_code = code;
-    std::string result(5, '\0'); // short code length 5
+    char result[6]; // short code length 5
+    result[5] = '\0'; // string ending flag
     for (int n = 0; n < 5; ++n) {
         result[4 - n] = SHORT_CODE_TABLE[short_code & 0b11111]; // aka _ % 32
         short_code >>= 5; // aka _ / 32