3 files changed, 108 insertions, 0 deletions
diff --git a/include/list_management.h b/include/list_management.h
new file mode 100644
index 0000000..0a887c7
--- /dev/null
+++ b/include/list_management.h
@@ -0,0 +1,35 @@
+/* SPDX-License-Identifier: Apache-2.0 */
+
+/* Copyright 2025 Thorsten Töpper
+ *
+ * list_management - data handling related code
+ *
+ * vim:ts=4:sw=4:expandtab
+ */
+
+#ifndef LIST_MANAGEMENT_H
+#define LIST_MANAGEMENT_H
+
+#include <time.h>
+
+/* === DEFINITIONS === */
+struct list_node {
+    struct list_node *next;
+    size_t fsize;
+    char fname[256];
+    time_t ftime; /* can be creation, access or modification */
+};
+
+struct list_head {
+    struct list_node *first;
+};
+
+struct list_node *create_node(char *fname, size_t fsize, time_t ftime);
+struct list_head *create_list_sort_reversed(struct list_head *list);
+void destroy_list(struct list_head *list);
+int insert_sorted_by_size(struct list_head *list, struct list_node *node);
+int insert_sorted_by_time(struct list_head *list, struct list_node *node);
+
+
+#endif
+
diff --git a/include/options.h b/include/options.h
new file mode 100644
index 0000000..70f22e4
--- /dev/null
+++ b/include/options.h
@@ -0,0 +1,44 @@
+/* SPDX-License-Identifier: Apache-2.0 */
+
+/* Copyright 2025 Thorsten Töpper
+ *
+ * dir_monitor - print specified stat() information from entries of a given
+ * directory to stdout. Call it via watch for repeated output to a terminal.
+ *
+ * vim:ts=4:sw=4:expandtab
+ */
+
+#ifndef OPTIONS_H
+#define OPTIONS_H
+
+#include <stdbool.h>
+
+#include "output.h"
+#include "list_management.h"
+
+
+
+/* === DEFINITIONS === */
+#define PATH_SEP '/'
+
+enum esort_type { SORT_BY_SIZE, SORT_BY_TIME };
+
+
+/* === GLOBAL VARIABLES === */
+extern bool option_sort_reverse_order;
+extern enum esort_type option_sort_type;
+extern bool option_show_hidden_entries;
+extern bool option_timestamp_long;
+
+
+int parse_arguments(int argc, char **argv);
+void set_option(const char *option_name, char *option_argument);
+/* In theory a part of output, but it's easier to place it near the struct
+ * containing the options in options.c */
+void usage(char *executable);
+
+
+
+
+#endif
+
diff --git a/include/output.h b/include/output.h
new file mode 100644
index 0000000..22f3885
--- /dev/null
+++ b/include/output.h
@@ -0,0 +1,29 @@
+/* SPDX-License-Identifier: Apache-2.0 */
+
+/* Copyright 2025 Thorsten Töpper
+ *
+ * output related functions and definitions
+ *
+ * vim:ts=4:sw=4:expandtab
+ */
+#ifndef OUTPUT_H
+#define OUTPUT_H
+#include <stdio.h>
+
+#include "list_management.h"
+
+
+#define LOGERR(...) {fprintf(stderr, "[%s:%d] %s: ", __FILE__, __LINE__, __func__); fprintf(stderr, __VA_ARGS__);}
+
+#ifdef DEBUGBUILD
+#define DBGTRC(...) LOGERR(__VA_ARGS__)
+#else
+#define DBGTRC(...)
+#endif
+
+
+int fputc_all_cols(char c, FILE *fdout);
+int fputc_width_x(char c, size_t x, FILE *fdout);
+void print_list(struct list_head *list);
+#endif
+