From 4a5d65f972708f79d3b7ce6a5317b21de8536dc5 Mon Sep 17 00:00:00 2001
From: Francisco Javier Trujillo Mata <fjtrujy@gmail.com>
Date: Wed, 6 Dec 2023 23:06:32 +0100
Subject: [PATCH] Expose functions for updating timezone properly

---
 ee/libcglue/Makefile            |  9 +++++++--
 ee/libcglue/include/ps2sdkapi.h |  8 ++++++--
 ee/libcglue/src/timezone.c      | 34 ++++++++++++++++++++++++++-------
 3 files changed, 40 insertions(+), 11 deletions(-)

diff --git a/ee/libcglue/Makefile b/ee/libcglue/Makefile
index a7d3ba1ef666..cb1ff65dbc0e 100644
--- a/ee/libcglue/Makefile
+++ b/ee/libcglue/Makefile
@@ -8,7 +8,9 @@
 
 EE_LIB = libcglue.a
 
-CORE_OBJS = timezone.o rtc.o
+CORE_OBJS = rtc.o
+
+TIMEZONE_OBJS = _libcglue_timezone_update.o ps2sdk_setTimezone.o ps2sdk_setDaylightSaving.o
 
 FDMAN_OBJS = __fdman_sema.o __descriptor_data_pool.o __descriptormap.o __fdman_init.o __fdman_deinit.o __fdman_get_new_descriptor.o \
 	__fdman_get_dup_descriptor.o __fdman_release_descriptor.o
@@ -37,13 +39,16 @@ GLUE_OBJS = __dummy_passwd.o __transform_errno.o __transform64_errno.o compile_t
 LOCK_OBJS = __retarget_lock_init.o __retarget_lock_acquire.o __retarget_lock_release.o __retarget_lock_try_acquire.o __retarget_lock_close.o \
 	__retarget_lock_init_recursive.o __retarget_lock_acquire_recursive.o __retarget_lock_release_recursive.o __retarget_lock_try_acquire_recursive.o __retarget_lock_close_recursive.o
 
-EE_OBJS = $(CORE_OBJS) $(SJIS_OBJS) $(TIME_OBJS) $(FDMAN_OBJS) $(INIT_OBJS) $(SLEEP_OBJS) $(TERMINATE_OBJS) $(CWD_OBJS) $(PS2SDKAPI_OBJS) $(GLUE_OBJS) $(LOCK_OBJS)
+EE_OBJS = $(CORE_OBJS) $(TIMEZONE_OBJS) $(SJIS_OBJS) $(TIME_OBJS) $(FDMAN_OBJS) $(INIT_OBJS) $(SLEEP_OBJS) $(TERMINATE_OBJS) $(CWD_OBJS) $(PS2SDKAPI_OBJS) $(GLUE_OBJS) $(LOCK_OBJS)
 
 include $(PS2SDKSRC)/Defs.make
 include $(PS2SDKSRC)/ee/Rules.lib.make
 include $(PS2SDKSRC)/ee/Rules.make
 include $(PS2SDKSRC)/ee/Rules.release
 
+$(TIMEZONE_OBJS:%=$(EE_OBJS_DIR)%): $(EE_SRC_DIR)timezone.c
+	$(EE_C_COMPILE) -DF_$(*:$(EE_OBJS_DIR)%=%) $< -c -o $@
+
 $(SJIS_OBJS:%=$(EE_OBJS_DIR)%): $(EE_SRC_DIR)sjis.c
 	$(EE_C_COMPILE) -DF_$(*:$(EE_OBJS_DIR)%=%) $< -c -o $@
 
diff --git a/ee/libcglue/include/ps2sdkapi.h b/ee/libcglue/include/ps2sdkapi.h
index 46e8c249dd72..398218da92aa 100644
--- a/ee/libcglue/include/ps2sdkapi.h
+++ b/ee/libcglue/include/ps2sdkapi.h
@@ -70,8 +70,6 @@ static inline ps2_clock_t ps2_clock(void) {
     return (ps2_clock_t)(GetTimerSystemTime() >> 8);
 }
 
-extern void _libcglue_timezone_update();
-
 extern s64 _ps2sdk_rtc_offset_from_busclk;
 extern void _libcglue_rtc_update();
 
@@ -80,4 +78,10 @@ extern void _libcglue_rtc_update();
 typedef int64_t off64_t;
 off64_t lseek64(int fd, off64_t offset, int whence);
 
+// Functions to be used related to timezone
+extern void _libcglue_timezone_update();
+
+void ps2sdk_setTimezone(int timezone);
+void ps2sdk_setDaylightSaving(int daylightSaving);
+
 #endif /* __PS2SDKAPI_H__ */
diff --git a/ee/libcglue/src/timezone.c b/ee/libcglue/src/timezone.c
index 39645a4e2e3e..00cdb7dc0e12 100644
--- a/ee/libcglue/src/timezone.c
+++ b/ee/libcglue/src/timezone.c
@@ -21,19 +21,22 @@
 #define OSD_CONFIG_NO_LIBCDVD
 #include "osd_config.h"
 
-__attribute__((weak))
-void _libcglue_timezone_update()
-{
-    /* Initialize timezone from PS2 OSD configuration */
-    int tzOffset = 0;
-	
+static inline void setPS2SDKFunctions() {
 	// Set ps2sdk functions
 	if (_ps2sdk_open == NULL) _set_ps2sdk_open();
 	if (_ps2sdk_close == NULL) _set_ps2sdk_close();
 	if (_ps2sdk_read == NULL) _set_ps2sdk_read();
+}
+
+#ifdef F__libcglue_timezone_update
+__attribute__((weak))
+void _libcglue_timezone_update()
+{
+    /* Initialize timezone from PS2 OSD configuration */
+    setPS2SDKFunctions();
 
 	_io_driver driver = { _ps2sdk_open, _ps2sdk_close, _ps2sdk_read };
-	configGetTimezoneWithIODriver(&driver);
+	int tzOffset = configGetTimezoneWithIODriver(&driver);
     int tzOffsetAbs = tzOffset < 0 ? -tzOffset : tzOffset;
     int hours = tzOffsetAbs / 60;
     int minutes = tzOffsetAbs - hours * 60;
@@ -42,3 +45,20 @@ void _libcglue_timezone_update()
     sprintf(tz, "GMT%s%02i:%02i%s", tzOffset < 0 ? "+" : "-", hours, minutes, daylight ? "DST" : "");
     setenv("TZ", tz, 1);
 }
+#endif
+
+#ifdef F_ps2sdk_setTimezone
+void ps2sdk_setTimezone(int timezone) {
+	setPS2SDKFunctions();
+	_io_driver driver = { _ps2sdk_open, _ps2sdk_close, _ps2sdk_read };
+	configSetTimezoneWithIODriver(timezone, &driver, _libcglue_timezone_update);
+}
+#endif
+
+#ifdef F_ps2sdk_setDaylightSaving
+void ps2sdk_setDaylightSaving(int daylightSaving) {
+	setPS2SDKFunctions();
+	_io_driver driver = { _ps2sdk_open, _ps2sdk_close, _ps2sdk_read };
+	configSetDaylightSavingEnabledWithIODriver(daylightSaving, &driver, _libcglue_timezone_update);
+}
+#endif
\ No newline at end of file