From 224535bfe9ef9bfae63168c8ed99c2b70d2f44b1 Mon Sep 17 00:00:00 2001
From: Holger Schemel <info@artsoft.org>
Date: Sat, 7 Aug 2021 21:29:06 +0200
Subject: [PATCH] added setup values to store system and player UUID

---
 src/files.c          | 28 +++++++++++++++++++++-
 src/libgame/misc.c   | 55 ++++++++++++++++++++++++++++++++++++++++++++
 src/libgame/misc.h   |  4 ++++
 src/libgame/system.c |  2 ++
 src/libgame/system.h |  5 ++++
 5 files changed, 93 insertions(+), 1 deletion(-)

diff --git a/src/files.c b/src/files.c
index e9cd8113..8e51f5ad 100644
--- a/src/files.c
+++ b/src/files.c
@@ -9509,6 +9509,14 @@ static struct TokenInfo global_setup_tokens[] =
     TYPE_STRING,
     &setup.player_name,				"player_name"
   },
+  {
+    TYPE_STRING,
+    &setup.player_uuid,				"player_uuid"
+  },
+  {
+    TYPE_STRING,
+    &setup.system_uuid,				"system_uuid"
+  },
   {
     TYPE_SWITCH,
     &setup.multiple_users,			"multiple_users"
@@ -10321,6 +10329,9 @@ static void setSetupInfoToDefaults(struct SetupInfo *si)
 
   si->player_name = getStringCopy(getDefaultUserName(user.nr));
 
+  si->player_uuid = NULL;	// (will be set later)
+  si->system_uuid = NULL;	// (will be set later)
+
   si->multiple_users = TRUE;
 
   si->sound = TRUE;
@@ -10866,6 +10877,20 @@ static void LoadSetup_SpecialPostProcessing(void)
   // make sure that scroll delay value stays inside valid range
   setup.scroll_delay_value =
     MIN(MAX(MIN_SCROLL_DELAY, setup.scroll_delay_value), MAX_SCROLL_DELAY);
+
+  if (setup.player_uuid == NULL ||
+      setup.system_uuid == NULL)
+  {
+    if (setup.player_uuid == NULL)
+      setup.player_uuid = getStringCopy(GetPlayerUUID());
+
+    if (setup.system_uuid == NULL)
+      setup.system_uuid = getStringCopy(GetSystemUUID());
+
+    SaveSetup();
+  }
+
+  SetSystemUUID(setup.system_uuid);
 }
 
 void LoadSetup(void)
@@ -10998,7 +11023,8 @@ void SaveSetup(void)
   for (i = 0; i < ARRAY_SIZE(global_setup_tokens); i++)
   {
     // just to make things nicer :)
-    if (global_setup_tokens[i].value == &setup.multiple_users		||
+    if (global_setup_tokens[i].value == &setup.player_uuid		||
+	global_setup_tokens[i].value == &setup.multiple_users		||
 	global_setup_tokens[i].value == &setup.sound			||
 	global_setup_tokens[i].value == &setup.graphics_set		||
 	global_setup_tokens[i].value == &setup.volume_simple		||
diff --git a/src/libgame/misc.c b/src/libgame/misc.c
index ed4c2606..bd93e1ce 100644
--- a/src/libgame/misc.c
+++ b/src/libgame/misc.c
@@ -549,6 +549,61 @@ boolean getTokenValueFromString(char *string, char **token, char **value)
 }
 
 
+// ----------------------------------------------------------------------------
+// UUID functions
+// ----------------------------------------------------------------------------
+
+#define UUID_BYTES		16
+#define UUID_CHARS		(UUID_BYTES * 2)
+#define UUID_LENGTH		(UUID_CHARS + 4)
+
+static char *getUUID(void)
+{
+  static char uuid[UUID_LENGTH + 1];
+  int data[UUID_BYTES];
+  int count = 0;
+  int i;
+
+  for (i = 0; i < UUID_BYTES; i++)
+    data[i] = GetSimpleRandom(256);
+
+  data[6] = 0x40 | (data[6] & 0x0f);
+  data[8] = 0x80 | (data[8] & 0x3f);
+
+  for (i = 0; i < UUID_BYTES; i++)
+  {
+    sprintf(&uuid[count], "%02x", data[i]);
+    count += 2;
+
+    if (i == 3 || i == 5 || i == 7 || i == 9)
+      strcat(&uuid[count++], "-");
+  }
+
+  return uuid;
+}
+
+char *GetPlayerUUID(void)
+{
+  return getUUID();
+}
+
+char *GetSystemUUID(void)
+{
+  if (program.system_uuid != NULL)
+    return program.system_uuid;
+
+  return getUUID();
+}
+
+void SetSystemUUID(char *uuid)
+{
+  if (program.system_uuid != NULL)
+    checked_free(program.system_uuid);
+
+  program.system_uuid = getStringCopy(uuid);
+}
+
+
 // ----------------------------------------------------------------------------
 // counter functions
 // ----------------------------------------------------------------------------
diff --git a/src/libgame/misc.h b/src/libgame/misc.h
index cb27fa4e..1665a246 100644
--- a/src/libgame/misc.h
+++ b/src/libgame/misc.h
@@ -120,6 +120,10 @@ int log_2(unsigned int);
 
 boolean getTokenValueFromString(char *, char **, char **);
 
+char *GetPlayerUUID(void);
+char *GetSystemUUID(void);
+void SetSystemUUID(char *);
+
 void InitCounter(void);
 unsigned int Counter(void);
 void Delay(unsigned int);
diff --git a/src/libgame/system.c b/src/libgame/system.c
index 28d8ebae..f186c143 100644
--- a/src/libgame/system.c
+++ b/src/libgame/system.c
@@ -103,6 +103,8 @@ void InitProgramInfo(char *argv0, char *config_filename, char *userdata_subdir,
   program.log_file[LOG_OUT_ID] = program.log_file_default[LOG_OUT_ID] = stdout;
   program.log_file[LOG_ERR_ID] = program.log_file_default[LOG_ERR_ID] = stderr;
 
+  program.system_uuid = NULL;
+
   program.headless = FALSE;
 }
 
diff --git a/src/libgame/system.h b/src/libgame/system.h
index 636240d5..bf7ec1a4 100644
--- a/src/libgame/system.h
+++ b/src/libgame/system.h
@@ -1013,6 +1013,8 @@ struct ProgramInfo
   void (*exit_message_function)(char *, va_list);
   void (*exit_function)(int);
 
+  char *system_uuid;		// initialized when reading first setup file
+
   boolean headless;
 };
 
@@ -1431,6 +1433,9 @@ struct SetupInfo
 {
   char *player_name;
 
+  char *player_uuid;
+  char *system_uuid;
+
   boolean multiple_users;
 
   boolean sound;
-- 
2.34.1