From 8226a31d9c46950df20afaad08c2f22745f74088 Mon Sep 17 00:00:00 2001
From: Kenpachi Developer <Kenpachi.Developer@gmx.de>
Date: Sat, 9 May 2020 20:44:00 +0200
Subject: Add script_is_permanent_variable() function

---
 src/map/script.c | 27 +++++++++++++++++++++++++++
 src/map/script.h |  1 +
 2 files changed, 28 insertions(+)

diff --git a/src/map/script.c b/src/map/script.c
index c08f5e829..e5c407cc7 100644
--- a/src/map/script.c
+++ b/src/map/script.c
@@ -3394,6 +3394,32 @@ static void set_reg_instance_num(struct script_state *st, int64 num, const char
 	}
 }
 
+/**
+ * Validates if a variable is permanent (stored in database) by passed variable name.
+ *
+ * @param name The variable name to validate.
+ * @return True if variable is permanent, otherwise false.
+ *
+ **/
+static bool script_is_permanent_variable(const char *name)
+{
+	nullpo_retr(false, name);
+
+	if (strlen(name) == 0)
+		return false;
+
+	if (ISALNUM(name[0]) != 0)
+		return true; // Permanent characater variable.
+
+	if (name[0] == '#')
+		return true; // Permanent (global) account variable.
+
+	if (strlen(name) > 1 && name[0] == '$' && ISALNUM(name[1]) != 0)
+		return true; // Permanent server variable.
+
+	return false;
+}
+
 /**
  * Stores the value of a script variable
  *
@@ -28250,6 +28276,7 @@ void script_defaults(void)
 	script->load_parameters = script_load_parameters;
 	script->print_line = script_print_line;
 	script->errorwarning_sub = script_errorwarning_sub;
+	script->is_permanent_variable = script_is_permanent_variable;
 	script->set_reg = set_reg;
 	script->set_reg_ref_str = set_reg_npcscope_str;
 	script->set_reg_pc_ref_str = set_reg_pc_ref_str;
diff --git a/src/map/script.h b/src/map/script.h
index 511497a66..5fa81dc0e 100644
--- a/src/map/script.h
+++ b/src/map/script.h
@@ -984,6 +984,7 @@ struct script_interface {
 	void (*load_parameters) (void);
 	const char* (*print_line) (StringBuf *buf, const char *p, const char *mark, int line);
 	void (*errorwarning_sub) (StringBuf *buf, const char *src, const char *file, int start_line, const char *error_msg, const char *error_pos);
+	bool (*is_permanent_variable) (const char *name);
 	int (*set_reg) (struct script_state *st, struct map_session_data *sd, int64 num, const char *name, const void *value, struct reg_db *ref);
 	void (*set_reg_ref_str) (struct script_state* st, struct reg_db *n, int64 num, const char* name, const char *str);
 	void (*set_reg_pc_ref_str) (struct script_state* st, struct reg_db *n, int64 num, const char* name, const char *str);
-- 
cgit v1.2.3-60-g2f50