5 files changed, 129 insertions, 29 deletions
diff --git a/include/gba/gba.h b/include/gba/gba.h
new file mode 100644
index 000000000..5a9dc9b2d
--- /dev/null
+++ b/include/gba/gba.h
@@ -0,0 +1,34 @@
+#ifndef GUARD_GBA_GBA_H
+#define GUARD_GBA_GBA_H
+
+#include <stddef.h>
+
+typedef unsigned char  u8;
+typedef unsigned short u16;
+typedef unsigned int   u32;
+typedef signed char    s8;
+typedef signed short   s16;
+typedef signed int     s32;
+
+typedef volatile u8  vu8;
+typedef volatile u16 vu16;
+typedef volatile u32 vu32;
+typedef volatile s8  vs8;
+typedef volatile s16 vs16;
+typedef volatile s32 vs32;
+
+typedef float  f32;
+typedef double f64;
+
+typedef u8  bool8;
+typedef u16 bool16;
+typedef u32 bool32;
+
+#define TRUE  1
+#define FALSE 0
+
+#include "gba/io_reg.h"
+#include "gba/syscall.h"
+#include "gba/macro.h"
+
+#endif // GUARD_GBA_GBA_H
diff --git a/include/global.h b/include/global.h
index 0c7fef66e..1747446f3 100644
--- a/include/global.h
+++ b/include/global.h
@@ -1,35 +1,7 @@
 #ifndef GUARD_GLOBAL_H
 #define GUARD_GLOBAL_H
 
-#include <stddef.h>
-
-typedef unsigned char  u8;
-typedef unsigned short u16;
-typedef unsigned int   u32;
-typedef signed char    s8;
-typedef signed short   s16;
-typedef signed int     s32;
-
-typedef volatile u8  vu8;
-typedef volatile u16 vu16;
-typedef volatile u32 vu32;
-typedef volatile s8  vs8;
-typedef volatile s16 vs16;
-typedef volatile s32 vs32;
-
-typedef float  f32;
-typedef double f64;
-
-typedef u8  bool8;
-typedef u16 bool16;
-typedef u32 bool32;
-
-#define TRUE  1
-#define FALSE 0
-
-#include "gba/io_reg.h"
-#include "gba/syscall.h"
-#include "gba/macro.h"
+#include "gba/gba.h"
 
 extern u8 gStringVar1[];
 extern u8 gStringVar2[];
@@ -41,6 +13,14 @@ enum
     FEMALE
 };
 
+struct Time
+{
+    s16 days;
+    s8 hours;
+    s8 minutes;
+    s8 seconds;
+};
+
 struct SaveBlock2
 {
     u8 playerName[8];
@@ -51,6 +31,8 @@ struct SaveBlock2
     u8 playTimeMinutes;
     u8 playTimeSeconds;
     u8 playTimeVBlanks;
+    u8 filler[0x85];
+    struct Time localTimeOffset;
 };
 
 extern struct SaveBlock2 gSaveBlock2;
diff --git a/include/rtc.h b/include/rtc.h
new file mode 100644
index 000000000..5ecff238f
--- /dev/null
+++ b/include/rtc.h
@@ -0,0 +1,54 @@
+#ifndef GUARD_RTC_H
+#define GUARD_RTC_H
+
+#include "gba/gba.h"
+
+#define RTC_INFO_CTRL_UNK1          0x01 // unknown
+#define RTC_INFO_CTRL_IRQ_ENABLE    0x02 // per-minute IRQ enable
+#define RTC_INFO_CTRL_UNK2          0x04 // unknown
+#define RTC_INFO_CTRL_24HOUR        0x40 // 0: 12-hour mode, 1: 24-hour mode
+#define RTC_INFO_CTRL_POWER_FAILURE 0x80 // power failure occurred
+
+enum
+{
+    MONTH_JAN = 1,
+    MONTH_FEB,
+    MONTH_MAR,
+    MONTH_APR,
+    MONTH_MAY,
+    MONTH_JUN,
+    MONTH_JUL,
+    MONTH_AUG,
+    MONTH_SEP,
+    MONTH_OCT,
+    MONTH_NOV,
+    MONTH_DEC
+};
+
+struct RtcInfo
+{
+    u8 year;
+    u8 month;
+    u8 day;
+    u8 dayOfWeek;
+    u8 hour;
+    u8 minute;
+    u8 second;
+    u8 control;
+    u8 unknown1;
+    u8 unknown2;
+};
+
+void RTC_Unprotect();
+void RTC_Protect();
+u8 RTC_Probe();
+bool8 RTC_Reset();
+bool8 RTC_GetControl(struct RtcInfo *rtc);
+bool8 RTC_SetControl(struct RtcInfo *rtc);
+bool8 RTC_GetDateTime(struct RtcInfo *rtc);
+bool8 RTC_SetDateTime(struct RtcInfo *rtc);
+bool8 RTC_GetTime(struct RtcInfo *rtc);
+bool8 RTC_SetTime(struct RtcInfo *rtc);
+bool8 RTC_SetUnknownData(struct RtcInfo *rtc);
+
+#endif // GUARD_RTC_H
diff --git a/include/rtc_util.h b/include/rtc_util.h
new file mode 100644
index 000000000..584b675d6
--- /dev/null
+++ b/include/rtc_util.h
@@ -0,0 +1,20 @@
+#ifndef GUARD_RTC_UTIL_H
+#define GUARD_RTC_UTIL_H
+
+#include "global.h"
+
+void RtcInit();
+u16 RtcGetErrorFlags();
+void RtcReset();
+void FormatDecimalTime(u8 *dest, s32 hour, s32 minute, s32 second);
+void FormatHexTime(u8 *dest, s32 hour, s32 minute, s32 second);
+void FormatHexRtcTime(u8 *dest);
+void FormatDecimalDate(u8 *dest, s32 year, s32 month, s32 day);
+void FormatHexDate(u8 *dest, s32 year, s32 month, s32 day);
+void RtcCalcLocalTime();
+void RtcInitLocalTimeOffset(s32 hours, s32 minutes);
+void RtcCalcLocalTimeOffset(s32 days, s32 hours, s32 minutes, s32 seconds);
+void CalcTimeDifference(struct Time *result, struct Time *t1, struct Time *t2);
+u32 RtcGetMinuteCount();
+
+#endif // GUARD_RTC_UTIL_H
diff --git a/include/string_util.h b/include/string_util.h
index d1b90aa34..0dee55828 100644
--- a/include/string_util.h
+++ b/include/string_util.h
@@ -1,6 +1,16 @@
 #ifndef GUARD_STRING_UTIL_H
 #define GUARD_STRING_UTIL_H
 
+#include "global.h"
+
+#define CHAR_SPACE          0x00
+#define CHAR_QUESTION_MARK  0xAC
+#define CHAR_HYPHEN         0xAE
+#define CHAR_COLON          0xF0
+#define EXT_CTRL_CODE_BEGIN 0xFC // extended control code
+#define PLACEHOLDER_BEGIN   0xFD // string placeholder
+#define EOS                 0xFF // end of string
+
 enum StringConvertMode
 {
     STR_CONV_MODE_LEFT_ALIGN,