Port menews_jisan.c from FireRed

1 files changed, 147 insertions, 0 deletions

diff --git a/src/mevent_news.c b/src/mevent_news.c
new file mode 100644
index 000000000..f5a061c84
--- /dev/null
+++ b/src/mevent_news.c
@@ -0,0 +1,147 @@
+#include "global.h"
+#include "mevent.h"
+#include "random.h"
+#include "event_data.h"
+#include "mevent_news.h"
+
+static u32 sub_801DCAC(struct MysteryEventStruct *);
+static void sub_801DD10(struct MysteryEventStruct *);
+static u32 sub_801DD44(struct MysteryEventStruct *);
+static void sub_801DCD8(struct MysteryEventStruct *);
+static void sub_801DCCC(struct MysteryEventStruct *);
+
+void sub_801DB68(u32 a0)
+{
+    struct MysteryEventStruct *r5 = sub_801B044();
+
+    r5->unk_0_0 = a0;
+    switch (a0)
+    {
+    case 0:
+        break;
+    case 1:
+    case 2:
+        r5->unk_1 = (Random() % 15) + 16;
+        break;
+    case 3:
+        r5->unk_1 = (Random() % 15) + 1;
+        break;
+    }
+}
+
+void sub_801DBC0(void)
+{
+    struct MysteryEventStruct *r5 = sub_801B044();
+
+    r5->unk_0_0 = 0;
+    r5->unk_0_2 = 0;
+    r5->unk_0_5 = 0;
+    r5->unk_1 = 0;
+    VarSet(VAR_0x402E, 0);
+}
+
+void sub_801DBDC(void)
+{
+    u16 *r4 = GetVarPointer(VAR_0x402E);
+    struct MysteryEventStruct *r2 = sub_801B044();
+    struct MysteryEventStruct r0 = *r2;
+
+    if ((u8)r0.unk_0_5 > 4 && ++(*r4) > 0x1f3)
+    {
+        r2->unk_0_5 = 0;
+        *r4 = 0;
+    }
+}
+
+u16 sub_801DC20(void)
+{
+    u16 *r6 = &gSpecialVar_Result;
+    struct MysteryEventStruct *r4 = sub_801B044();
+    u16 r5;
+
+    if (!IsMysteryEventEnabled() || !sub_801B0CC())
+        return 0;
+
+    r5 = sub_801DD44(r4);
+
+    switch (r5)
+    {
+    case 0:
+        break;
+    case 1:
+        *r6 = sub_801DCAC(r4);
+        break;
+    case 2:
+        *r6 = sub_801DCAC(r4);
+        break;
+    case 3:
+        break;
+    case 4:
+        *r6 = sub_801DCAC(r4);
+        sub_801DCD8(r4);
+        break;
+    case 5:
+        *r6 = sub_801DCAC(r4);
+        sub_801DCCC(r4);
+        break;
+    case 6:
+        break;
+    }
+
+    return r5;
+}
+
+static u32 sub_801DCAC(struct MysteryEventStruct *a0)
+{
+    u32 r4;
+
+    a0->unk_0_0 = 0;
+    r4 = a0->unk_1 + 0x84;
+    a0->unk_1 = 0;
+    sub_801DD10(a0);
+    return r4;
+}
+
+static void sub_801DCCC(struct MysteryEventStruct *a0)
+{
+    a0->unk_0_2 = 0;
+}
+
+static void sub_801DCD8(struct MysteryEventStruct *a0)
+{
+    a0->unk_0_2++;
+    if ((u8)a0->unk_0_2 > 4)
+        a0->unk_0_2 = 4;
+}
+
+static void sub_801DD10(struct MysteryEventStruct *a0)
+{
+    a0->unk_0_5++;
+    if ((u8)a0->unk_0_5 > 5)
+        a0->unk_0_5 = 5;
+}
+
+static u32 sub_801DD44(struct MysteryEventStruct *a0)
+{
+    struct MysteryEventStruct r0;
+    if ((u8)a0->unk_0_5 == 5)
+        return 6;
+
+    r0 = *a0;
+    switch (r0.unk_0_0)
+    {
+    case 0:
+        return 3;
+    case 1:
+        return 1;
+    case 2:
+        return 2;
+    case 3:
+        if ((u8)r0.unk_0_2 < 3)
+            return 4;
+        return 5;
+    default:
+        AGB_ASSERT(0);
+        return 0;
+    }
+}