From 23d2f670808933aa20448194b2a4ff26386d7905 Mon Sep 17 00:00:00 2001
From: Thorsten Töpper <atsutane@freethoughts.de>
Date: Thu, 14 Aug 2025 21:34:19 +0200
Subject: tree_based_check: switch to unsigned values

---
 src/tree_based_check.c | 24 +++++++++++++-----------
 1 file changed, 13 insertions(+), 11 deletions(-)

(limited to 'src')

diff --git a/src/tree_based_check.c b/src/tree_based_check.c
index abf1232..6e76981 100644
--- a/src/tree_based_check.c
+++ b/src/tree_based_check.c
@@ -36,7 +36,7 @@
 
 struct list_node {
     struct list_node *next;
-    char data[FULL_DATABLOCK_SIZE];
+    unsigned char data[FULL_DATABLOCK_SIZE];
 };
 
 struct list_head {
@@ -64,14 +64,14 @@ size_t freed = 0;
 
 struct list_head *create_list_head();
 void destroy_list(struct list_head *head);
-int insert_data_into_list(struct list_head *head, char *data);
+int insert_data_into_list(struct list_head *head, unsigned char *data);
 int remove_data_from_list(struct list_head *head, char *data);
-int check_list_for_data(struct list_head *head, char *data);
+int check_list_for_data(struct list_head *head, unsigned char *data);
 struct tree_root *create_tree_root();
 void destroy_tree_branches(struct tree_branch *branch);
 void destroy_tree(struct tree_root *root);
-int insert_into_tree(struct tree_root *root, char *data);
-int check_tree_for_data(struct tree_root *root, char *data);
+int insert_into_tree(struct tree_root *root, unsigned char *data);
+int check_tree_for_data(struct tree_root *root, unsigned char *data);
 void print_list_plain(struct list_head *head, FILE *fd);
 void print_tree_branch(struct tree_branch *branch, FILE *fd);
 void print_tree(struct tree_root *root, FILE *fd);
@@ -135,7 +135,7 @@ inline void destroy_list(struct list_head *head) {
 }
 
 /* No time consuming duplicate check, data to be processed is expected to be gone sorted through uniq */
-inline int insert_data_into_list(struct list_head *head, char *data) {
+inline int insert_data_into_list(struct list_head *head, unsigned char *data) {
     struct list_node *node;
     if (head == NULL || data == NULL) {
         LOGERR("ERROR: Improper arguments.\n");
@@ -217,7 +217,7 @@ inline int remove_data_from_list(struct list_head *head, char *data) {
  * removed to safe time with future checks. However, in case the input file is
  * sorted, Thread safety has negative performance impact.
  */
-inline int check_list_for_data(struct list_head *head, char *data) {
+inline int check_list_for_data(struct list_head *head, unsigned char *data) {
     struct list_node *node;
     int rc = 1;
     if (head == NULL || data == NULL) {
@@ -275,7 +275,7 @@ inline void destroy_tree(struct tree_root *root) {
     free(root);
 }
 
-inline int insert_into_tree(struct tree_root *root, char *data) {
+inline int insert_into_tree(struct tree_root *root, unsigned char *data) {
     int depth = 0, i =0;
     struct tree_branch *ptr = NULL;
     unsigned char uc = 0;
@@ -323,7 +323,7 @@ inline int insert_into_tree(struct tree_root *root, char *data) {
 
 /* Return values:
  * < 0  ERROR  | == 0 FOUND | > 0 NOT FOUND */
-inline int check_tree_for_data(struct tree_root *root, char *data) {
+inline int check_tree_for_data(struct tree_root *root, unsigned char *data) {
     int depth = 0;
     struct tree_branch *ptr;
     unsigned char uc;
@@ -391,7 +391,8 @@ struct tree_root *read_file_into_tree(char *filename) {
     size_t line_nr=0;
     struct tree_root *root = NULL;
     FILE *fd = NULL;
-    char *line = NULL, *data = NULL;
+    char *line = NULL;
+    unsigned char *data = NULL;
 
     if (filename == NULL || strlen(filename) == 0) {
         return NULL;
@@ -461,7 +462,8 @@ struct tree_root *read_file_into_tree(char *filename) {
 int filter_file_with_tree(char *filename, FILE *output, struct tree_root *root) {
     size_t line_nr=0;
     FILE *fd = NULL;
-    char *line = NULL, *data = NULL;
+    char *line = NULL;
+    unsigned char *data = NULL;
     int check_result = 0;
     int rc = 0;
 
-- 
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