Merge pull request #342 from camthesaxman/decompile_unused_8124F94

decompile unused_8124F94

3 files changed, 127 insertions, 286 deletions

diff --git a/asm/unused_8124F94.s b/asm/unused_8124F94.s
deleted file mode 100644
index 335cf4453..000000000
--- a/asm/unused_8124F94.s
+++ /dev/null
@@ -1,285 +0,0 @@
-	.include "constants/gba_constants.inc"
-	.include "constants/species_constants.inc"
-	.include "asm/macros.inc"
-
-	.syntax unified
-
-	.text
-
-	thumb_func_start unref_sub_8124F94
-unref_sub_8124F94: @ 8124F94
-	sub sp, 0x4
-	movs r3, 0
-	strb r3, [r0, 0x1]
-	strb r3, [r0]
-	strh r3, [r0, 0x2]
-	movs r1, 0xC0
-	lsls r1, 19
-	str r1, [r0, 0x4]
-	mov r1, sp
-	strh r3, [r1]
-	ldr r2, _08124FCC @ =0x040000d4
-	str r1, [r2]
-	adds r1, r0, 0
-	adds r1, 0x8
-	str r1, [r2, 0x4]
-	ldr r1, _08124FD0 @ =0x81000040
-	str r1, [r2, 0x8]
-	ldr r1, [r2, 0x8]
-	mov r1, sp
-	strh r3, [r1]
-	str r1, [r2]
-	adds r0, 0x88
-	str r0, [r2, 0x4]
-	ldr r0, _08124FD4 @ =0x810000c0
-	str r0, [r2, 0x8]
-	ldr r0, [r2, 0x8]
-	add sp, 0x4
-	bx lr
-	.align 2, 0
-_08124FCC: .4byte 0x040000d4
-_08124FD0: .4byte 0x81000040
-_08124FD4: .4byte 0x810000c0
-	thumb_func_end unref_sub_8124F94
-
-	thumb_func_start unref_sub_8124FD8
-unref_sub_8124FD8: @ 8124FD8
-	push {r4-r7,lr}
-	adds r4, r0, 0
-	adds r5, r1, 0
-	ldr r7, _08124FE4 @ =0x040000d4
-	b _0812508A
-	.align 2, 0
-_08124FE4: .4byte 0x040000d4
-_08124FE8:
-	ldrb r0, [r4, 0x1]
-	lsls r1, r0, 1
-	adds r1, r0
-	lsls r1, 2
-	adds r0, r4, 0
-	adds r0, 0x88
-	adds r0, r1
-	str r3, [r0]
-	ldrb r1, [r4, 0x1]
-	lsls r0, r1, 1
-	adds r0, r1
-	lsls r0, 2
-	adds r0, r4, r0
-	ldrb r1, [r5, 0x6]
-	adds r0, 0x8E
-	strb r1, [r0]
-	ldrb r1, [r4, 0x1]
-	lsls r0, r1, 1
-	adds r0, r1
-	lsls r0, 2
-	adds r0, r4, r0
-	ldrb r1, [r5, 0x4]
-	adds r0, 0x8C
-	strb r1, [r0]
-	ldrb r1, [r4, 0x1]
-	lsls r0, r1, 1
-	adds r0, r1
-	lsls r0, 2
-	adds r0, r4, r0
-	ldrb r1, [r5, 0x5]
-	adds r0, 0x8D
-	strb r1, [r0]
-	ldrb r1, [r5, 0x4]
-	ldrb r0, [r5, 0x5]
-	adds r6, r1, 0
-	muls r6, r0
-	ldrh r2, [r4, 0x2]
-	adds r1, r2, r6
-	movs r0, 0x80
-	lsls r0, 3
-	cmp r1, r0
-	ble _08125040
-	movs r0, 0x2
-	b _0812509C
-_08125040:
-	ldrh r0, [r5, 0x8]
-	cmp r0, 0
-	bne _08125060
-	str r3, [r7]
-	ldrh r1, [r4, 0x2]
-	lsls r1, 6
-	ldr r0, [r4, 0x4]
-	adds r0, r1
-	str r0, [r7, 0x4]
-	lsls r0, r6, 4
-	movs r1, 0x80
-	lsls r1, 24
-	orrs r0, r1
-	str r0, [r7, 0x8]
-	ldr r0, [r7, 0x8]
-	b _0812506C
-_08125060:
-	lsls r0, r2, 6
-	ldr r1, [r4, 0x4]
-	adds r1, r0
-	adds r0, r3, 0
-	bl sub_800D238
-_0812506C:
-	ldrb r1, [r4, 0x1]
-	lsls r0, r1, 1
-	adds r0, r1
-	lsls r0, 2
-	adds r0, r4, r0
-	ldrh r1, [r4, 0x2]
-	adds r0, 0x90
-	strh r1, [r0]
-	ldrh r0, [r4, 0x2]
-	adds r0, r6, r0
-	strh r0, [r4, 0x2]
-	ldrb r0, [r4, 0x1]
-	adds r0, 0x1
-	strb r0, [r4, 0x1]
-	adds r5, 0xC
-_0812508A:
-	ldrb r0, [r4, 0x1]
-	cmp r0, 0x1F
-	bhi _0812509A
-	ldr r3, [r5]
-	cmp r3, 0
-	bne _08124FE8
-	movs r0, 0
-	b _0812509C
-_0812509A:
-	movs r0, 0x1
-_0812509C:
-	pop {r4-r7}
-	pop {r1}
-	bx r1
-	thumb_func_end unref_sub_8124FD8
-
-	thumb_func_start unref_sub_81250A4
-unref_sub_81250A4: @ 81250A4
-	push {r4,r5,lr}
-	sub sp, 0x20
-	adds r4, r0, 0
-	adds r5, r1, 0
-	b _081250FC
-_081250AE:
-	ldrb r1, [r4]
-	lsls r1, 3
-	adds r0, r4, 0
-	adds r0, 0x8
-	adds r0, r1
-	str r2, [r0]
-	ldrb r0, [r4]
-	lsls r0, 3
-	adds r0, r4, r0
-	ldrb r1, [r5, 0x4]
-	strb r1, [r0, 0xC]
-	ldrb r0, [r5, 0x5]
-	cmp r0, 0
-	bne _081250D8
-	ldrb r1, [r4]
-	lsls r1, 4
-	adds r0, r2, 0
-	movs r2, 0x20
-	bl LoadPalette
-	b _081250EC
-_081250D8:
-	adds r0, r2, 0
-	mov r1, sp
-	bl sub_800D238
-	ldrb r1, [r4]
-	lsls r1, 4
-	mov r0, sp
-	movs r2, 0x20
-	bl LoadPalette
-_081250EC:
-	ldrb r0, [r4]
-	lsls r1, r0, 3
-	adds r1, r4, r1
-	strb r0, [r1, 0xD]
-	ldrb r0, [r4]
-	adds r0, 0x1
-	strb r0, [r4]
-	adds r5, 0x8
-_081250FC:
-	ldrb r0, [r4]
-	cmp r0, 0xF
-	bhi _0812510C
-	ldr r2, [r5]
-	cmp r2, 0
-	bne _081250AE
-	movs r0, 0
-	b _0812510E
-_0812510C:
-	movs r0, 0x1
-_0812510E:
-	add sp, 0x20
-	pop {r4,r5}
-	pop {r1}
-	bx r1
-	thumb_func_end unref_sub_81250A4
-
-	thumb_func_start unref_sub_8125118
-unref_sub_8125118: @ 8125118
-	push {r4-r7,lr}
-	ldr r4, _0812514C @ =0xfffffe00
-	add sp, r4
-	adds r5, r0, 0
-	adds r6, r1, 0
-	movs r2, 0x80
-	lsls r2, 2
-	mov r0, sp
-	movs r1, 0
-	bl memset
-	ldrb r7, [r6, 0x5]
-	ldr r0, [r6]
-	mov r1, sp
-	bl sub_800D238
-	ldrb r4, [r5]
-	cmp r4, r7
-	bcs _08125186
-_0812513E:
-	ldrb r0, [r5]
-	adds r0, r4
-	cmp r0, 0xF
-	ble _08125150
-	movs r0, 0x1
-	b _08125188
-	.align 2, 0
-_0812514C: .4byte 0xfffffe00
-_08125150:
-	lsls r2, r4, 3
-	adds r0, r5, 0
-	adds r0, 0x8
-	adds r0, r2
-	ldr r1, [r6]
-	str r1, [r0]
-	adds r2, r5, r2
-	ldrb r0, [r6, 0x4]
-	adds r0, r4, r0
-	strb r0, [r2, 0xC]
-	ldrb r0, [r5]
-	strb r0, [r2, 0xD]
-	lsls r0, r4, 5
-	add r0, sp
-	ldrb r1, [r5]
-	lsls r1, 4
-	movs r2, 0x20
-	bl LoadPalette
-	ldrb r0, [r5]
-	adds r0, 0x1
-	strb r0, [r5]
-	adds r0, r4, 0x1
-	lsls r0, 24
-	lsrs r4, r0, 24
-	cmp r4, r7
-	bcc _0812513E
-_08125186:
-	movs r0, 0
-_08125188:
-	movs r3, 0x80
-	lsls r3, 2
-	add sp, r3
-	pop {r4-r7}
-	pop {r1}
-	bx r1
-	thumb_func_end unref_sub_8125118
-
-	.align 2, 0 @ Don't pad with nop.
diff --git a/ld_script.txt b/ld_script.txt
index efd2c1d35..503629849 100755
--- a/ld_script.txt
+++ b/ld_script.txt
@@ -239,7 +239,7 @@ SECTIONS {
         asm/cable_car.o(.text);
         asm/roulette_util.o(.text);
         asm/cable_car_util.o(.text);
-        asm/unused_8124F94.o(.text);
+        src/unused_8124F94.o(.text);
         src/save.o(.text);
         src/mystery_event_script.o(.text);
         asm/mystery_event_script.o(.text);
diff --git a/src/unused_8124F94.c b/src/unused_8124F94.c
new file mode 100644
index 000000000..93b569058
--- /dev/null
+++ b/src/unused_8124F94.c
@@ -0,0 +1,126 @@
+#include "global.h"
+#include "decompress.h"
+#include "palette.h"
+
+struct UnknownStruct2
+{
+    void *src;
+    u8 unk4;
+    u8 unk5;
+    u8 unk6;
+    u16 unk8;
+};
+
+struct UnknownStruct3
+{
+    u16 *paletteSrc;
+    u8 unk4;
+    u8 paletteCount;
+};
+
+struct UnknownStruct1
+{
+    u8 paletteNum;
+    u8 unk1;
+    u16 unk2;
+    u8 *dest;
+    struct UnknownStruct3 unk8[16];
+    struct UnknownStruct2 unk88[32];
+};
+
+void unref_sub_8124F94(struct UnknownStruct1 *a)
+{
+    a->unk1 = 0;
+    a->paletteNum = 0;
+    a->unk2 = 0;
+    a->dest = (void *)VRAM;
+    DmaFill16(3, 0, a->unk8, sizeof(a->unk8));
+    DmaFill16(3, 0, a->unk88, sizeof(a->unk88));
+}
+
+u8 unref_sub_8124FD8(struct UnknownStruct1 *a, const struct UnknownStruct2 *b)
+{
+    while (1)
+    {
+        s32 r6;
+        s32 temp;
+
+        // Couldn't get it to match any other way
+        if (a->unk1 < 32 && b->src == NULL)
+            return 0;
+        if (a->unk1 >= 32)
+            break;
+
+        a->unk88[a->unk1].src = b->src;
+        a->unk88[a->unk1].unk6 = b->unk6;
+        a->unk88[a->unk1].unk4 = b->unk4;
+        a->unk88[a->unk1].unk5 = b->unk5;
+        r6 = b->unk4 * b->unk5;
+        if (a->unk2 + r6 > 0x400)
+            return 2;
+        if (b->unk8 == 0)
+        {
+            DmaCopy16(3, b->src, a->dest + a->unk2 * 64, r6 * 32);
+        }
+        else
+        {
+            sub_800D238(b->src, a->dest + a->unk2 * 64);
+        }
+        a->unk88[a->unk1].unk8 = a->unk2;
+        temp = r6 + a->unk2;
+        a->unk2 = temp;
+        a->unk1++;
+        b++;
+    }
+    return 1;
+}
+
+u8 unref_sub_81250A4(struct UnknownStruct1 *a, struct UnknownStruct3 *b)
+{
+    while (1)
+    {
+        // Couldn't get it to match any other way
+        if (a->paletteNum < 16 && b->paletteSrc == NULL)
+            return 0;
+        if (a->paletteNum >= 16)
+            break;
+
+        a->unk8[a->paletteNum].paletteSrc = b->paletteSrc;
+        a->unk8[a->paletteNum].unk4 = b->unk4;
+        if (b->paletteCount == 0)
+        {
+            LoadPalette(b->paletteSrc, a->paletteNum * 16, 32);
+        }
+        else
+        {
+            u16 palette[16];
+
+            sub_800D238(b->paletteSrc, palette);
+            LoadPalette(palette, a->paletteNum * 16, 32);
+        }
+        a->unk8[a->paletteNum].paletteCount = a->paletteNum;
+        a->paletteNum = a->paletteNum + 1;
+        b++;
+    }
+    return 1;
+}
+
+u8 unref_sub_8125118(struct UnknownStruct1 *a, struct UnknownStruct3 *b)
+{
+    u16 palettes[16][16] = {0};
+    u8 r7 = b->paletteCount;
+    u8 i;
+
+    sub_800D238(b->paletteSrc, palettes);
+    for (i = a->paletteNum; i < r7; i++)
+    {
+        if (a->paletteNum + i >= 16)
+            return 1;
+        a->unk8[i].paletteSrc = b->paletteSrc;
+        a->unk8[i].unk4 = b->unk4 + i;
+        a->unk8[i].paletteCount = a->paletteNum;
+        LoadPalette(palettes[i], a->paletteNum * 16, sizeof(palettes[i]));
+        a->paletteNum++;
+    }
+    return 0;
+}