344 lines
9.3 KiB
C
344 lines
9.3 KiB
C
#include <ultra64.h>
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#include "functions.h"
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#include "variables.h"
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void func_8031FFAC(void);
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void fileProgressFlag_set(s32 index, s32 set);
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s32 bitfield_get_bit(u8 *array, s32 index);
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s32 bitfield_get_n_bits(u8 *array, s32 offset, s32 numBits);
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void bitfield_set_bit(u8 *array, s32 index, s32 set);
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void bitfield_set_n_bits(u8 *array, s32 startIndex, s32 set, s32 length);
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void volatileFlag_clear(void);
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void volatileFlag_set(s32 arg0, s32 arg1);
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s32 fileProgressFlag_getN(s32 offset, s32 numBits);
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void func_8031CE70(f32 *arg0, s32 arg1, s32 arg2);
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void ml_vec3h_to_vec3f(f32 *, s32);
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void func_8028F3D8(f32 *, f32, void(*)(ActorMarker *), ActorMarker *);
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struct unkfunc_80304ED0 *func_80304ED0(void*, f32 *);
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void func_8031CD44(s32, s32, f32, f32, s32);
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void func_80256E24(f32 *, f32, f32, f32, f32, f32);
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#define OBSCURE(ptr) (((((s32)(ptr) ^ 0x746DF219) & 0xFF) + ((((s32)(ptr) >> 0x18) & 0xFF) << 0x18) + ((((s32)(ptr) >> 8) & 0xFFFF) << 8)) ^ 0x19)
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/* .data */
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s32 gVolatileFlagsSize = 0x24; // sizeof(gVolatileFlags)
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/* .bss */
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struct {
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s32 unk0;
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s32 unk4;
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u8 unk8[0x25];
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} gFileProgressFlags;
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struct {
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s32 unk0;
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s32 unk4;
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u8 unk8[0x19];
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} gVolatileFlags;
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u8 glVolatileFlagsCopy[0x21]; //copy of gVolatileFlags
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/* .code */
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void func_8031FC40(void) {
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s32 *scrambled_ptr;
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s32 *unscrambled_ptr;
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u32 a1;
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s32 t0;
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s32 t1;
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u32 a0;
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u8 *ptr;
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u32 v0 = 0x17536C34;
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u32 v1;
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//obsucre address
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t0 = (((s32)&gFileProgressFlags.unk8 & 0xE0000000) >> 15) +
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(((s32)&gFileProgressFlags.unk8 & 0x1FC00000) >> 22) +
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(((s32)&gFileProgressFlags.unk8 & 0x00300000) << 10) +
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(((s32)&gFileProgressFlags.unk8 & 0x000F0000) << 7) +
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(((s32)&gFileProgressFlags.unk8 & 0x0000E000) << 14) +
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(((s32)&gFileProgressFlags.unk8 & 0x00001800) >> 4) +
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(((s32)&gFileProgressFlags.unk8 & 0x00000780) << 10) +
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(((s32)&gFileProgressFlags.unk8 & 0x00000060) << 4) +
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(((s32)&gFileProgressFlags.unk8 & 0x00000018) << 18) +
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(((s32)&gFileProgressFlags.unk8 & 0x00000007) << 11);
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//unobscure address
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t1 = ((t0 & 0x1E0600) << 0xB) | ((s32) (t0 & 0x603800) / 8);
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a0 = (((t0 & 0x1C07F) << 0xF) + ((u32) (t0 & 0xC7800000) >> 0x11)) | (((t0 & 0x38000000) / (1 << 24)) + ((s32) (t0 & 0x180) >> 6)); \
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a1 = a0; \
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a0 = (((a1 & 0x3FE000) << 7)
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| (((t1 >> 8) & 7) + ((a1 << 0xA) & 0xFF800))
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| ((((u32) (t1 & 0xF0000000) >> 0x15) + (a1 & 0xE0000000)) ^ ((s32) ((t1 /0x40) & 0xF000) >> 9)));
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//calculate checksum
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ptr = (u8*)(a0);
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a1 = 0x25;
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for(v1 = 0; v1 < a1; v1++){
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v0 = (((v0 - ptr[v1]) & 0x1F) << 0xF) ^ ((ptr[v1]* 0x1B) + (v0 >> 0xB));
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}
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scrambled_ptr = (s32 *) ((((s32) &gFileProgressFlags & 0x55555555) << 1) + (((s32) &gFileProgressFlags & 0xAAAAAAAA) >> 1));
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unscrambled_ptr = (s32 *) ((((s32) scrambled_ptr & 0x55555555) << 1) | (((s32) scrambled_ptr & 0xAAAAAAAA) >> 1));
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*unscrambled_ptr = v0;
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}
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u32 func_8031FE40(void) {
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u8 *obscured_addr;
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u32 var_v1;
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u32 var_a2;
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u32 var_v0;
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var_v1 = 0xDE1C05;
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var_v0 = 0x25;
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obscured_addr = (u8*)OBSCURE(&gFileProgressFlags.unk8[0]);
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for(var_a2 = 0; var_a2 < var_v0; var_a2++){
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var_v1 += ((var_v1 % 4) + var_a2) * obscured_addr[var_a2];
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}
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return var_v1;
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}
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void func_8031FEC0(void) {
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u32 *obscured_addr;
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obscured_addr = (u32*)OBSCURE(&gFileProgressFlags.unk4);
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*obscured_addr = func_8031FE40();
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}
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bool fileProgressFlag_get(enum file_progress_e index) {
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return bitfield_get_bit(gFileProgressFlags.unk8, index);
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}
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s32 fileProgressFlag_getN(s32 offset, s32 numBits) {
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return bitfield_get_n_bits(gFileProgressFlags.unk8, offset, numBits);
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}
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s32 fileProgressFlag_getAndSet(s32 index, s32 set) {
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s32 ret;
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ret = fileProgressFlag_get(index);
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fileProgressFlag_set(index, set);
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return ret;
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}
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void func_8031FFAC(void) {
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s32 i;
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for (i = 0; i < 37; i++) {
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gFileProgressFlags.unk8[i] = 0;
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}
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func_8031FC40();
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func_8031FEC0();
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}
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void fileProgressFlag_set(s32 index, s32 set) {
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bitfield_set_bit(gFileProgressFlags.unk8, index, set);
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func_8031FC40();
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func_8031FEC0();
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}
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void fileProgressFlag_setN(s32 startIndex, s32 set, s32 length) {
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bitfield_set_n_bits(gFileProgressFlags.unk8, startIndex, set, length);
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func_8031FC40();
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func_8031FEC0();
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}
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void fileProgressFlag_getSizeAndPtr(s32 *size, u8 **addr) {
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*size = 0x25;
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*addr = gFileProgressFlags.unk8;
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}
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// Returns a single bit from a byte array
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s32 bitfield_get_bit(u8 *array, s32 index) {
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s32 ret;
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if (array[index / 8] & (1 << (index & 7))) {
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ret = 1;
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} else {
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ret = 0;
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}
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return ret;
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}
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// Extracts an integer of the given number of bits from a byte array at the starting bit offset
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s32 bitfield_get_n_bits(u8 *array, s32 offset, s32 numBits) {
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s32 ret = 0;
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s32 i;
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for (i = 0; i < numBits; i++) {
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ret |= (bitfield_get_bit(array, offset + i) << i);
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}
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return ret;
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}
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// Sets or clears a single bit in a byte array
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void bitfield_set_bit(u8 *array, s32 index, s32 set) {
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if (set) {
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array[index / 8] |= (1 << (index & 7));
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} else {
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array[index / 8] &= ~(1 << (index & 7));
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}
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}
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// Sets or clears a range of bits in a byte array
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void bitfield_set_n_bits(u8 *array, s32 startIndex, s32 set, s32 length) {
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s32 i;
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for (i = 0; i < length; i++) {
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bitfield_set_bit(array, startIndex + i, (1 << i) & set);
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}
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}
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s32 dummy_func_80320240(void){return 1;}
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s32 dummy_func_80320248(void){return 1;}
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u32 func_80320250(void) {
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u32 checksum = 0x6CE9E91F;
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u8 *obscured_addr = (u8*)OBSCURE(&gVolatileFlags.unk8[0]);
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s32 len = 25;
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u32 i;
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for (i = 0; i < len; i++) {
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s32 val = obscured_addr[i];
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checksum = val ^ (((checksum + val & 0xF) << 0x18) ^ (checksum >> 3));
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}
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return checksum;
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}
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void func_803202D0(void) {
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s32 addr = (s32) &gVolatileFlags.unk0;
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addr ^= 0x7EDDF5F4;
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addr ^= 0x7BEF9D80;
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addr ^= 0x5326874;
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*(s32*)(addr) = func_80320250();
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}
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s32 func_80320320(void) {
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s32 addr = (s32) &gVolatileFlags.unk8[0];
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s32 checksum = 0x281E421C;
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s32 len = 25;
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s32 scrambled;
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u32 i;
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// Scrambles the address of D_803831D8
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scrambled = (addr >> 8) & 0xFF0000;
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scrambled += (addr & 0xFF) << 8;
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scrambled = addr ^ scrambled;
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// Unscrambles the address of D_803831D8
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addr = (scrambled & 0xFF000000) >> 8;
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addr += (scrambled << 8) & 0xFF00;
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addr ^= scrambled;
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for (i = 0; i < len; i++) {
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checksum += (1 + i) * ((u8*)addr)[i];
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}
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return checksum;
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}
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void func_803203A0(void) {
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u32 *obscured_addr = (u32*)OBSCURE(&gVolatileFlags.unk4);
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*obscured_addr = func_80320320();
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}
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s32 volatileFlag_get(s32 index) {
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return bitfield_get_bit(gVolatileFlags.unk8, index);
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}
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s32 volatileFlag_getN(s32 index, s32 numBits) {
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return bitfield_get_n_bits(gVolatileFlags.unk8, index, numBits);
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}
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s32 volatileFlag_getAndSet(s32 index, s32 arg1) {
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s32 temp_v0;
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temp_v0 = volatileFlag_get(index);
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volatileFlag_set(index, arg1);
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return temp_v0;
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}
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void volatileFlag_clear(void) {
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s32 i;
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for (i = 0; i < 25; i++) {
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gVolatileFlags.unk8[i] = 0;
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}
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func_803202D0();
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func_803203A0();
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}
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void volatileFlag_set(s32 index, s32 set) {
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bitfield_set_bit(gVolatileFlags.unk8, index, set);
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func_803202D0();
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func_803203A0();
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}
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void volatileFlag_setN(s32 startIndex, s32 set, s32 length) {
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bitfield_set_n_bits(gVolatileFlags.unk8, startIndex, set, length);
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func_803202D0();
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func_803203A0();
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}
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s32 func_8032056C(void) {
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s32 temp_a0;
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s32 temp_a1;
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s32 temp_a1_2;
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s32 phi_t9;
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s32 addr = (s32)&gVolatileFlags;
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s32 temp_v1;
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temp_v1 = ((addr & 0xE0000000) >> 15) +
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((addr & 0x1FC00000) >> 22) +
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((addr & 0x00300000) << 10) +
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((addr & 0x000F0000) << 7) +
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((addr & 0x0000E000) << 14) +
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((addr & 0x00001800) >> 4) +
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((addr & 0x00000780) << 10) +
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((addr & 0x00000060) << 4) +
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((addr & 0x00000018) << 18) +
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((addr & 0x00000007) << 11);
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phi_t9 = (temp_v1 & 0x38000000) / (1 << 24);
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temp_a0 = ((temp_v1 & 0x1E0600) << 0xB) | ((s32) (temp_v1 & 0x603800) / 8);
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temp_a1 = (((temp_v1 & 0x1C07F) << 15) + ((temp_v1 & 0xC7800000) >> 17)) |
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(phi_t9 + ((s32) (temp_v1 & 0x180) >> 6));
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temp_a1 = ((temp_a1 & 0x3FE000) << 7) |
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(((temp_a0 >> 8) & 7) + ((temp_a1 << 0xA) & 0xFF800)) |
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((((u32) (temp_a0 & 0xF0000000) >> 0x15) + (temp_a1 & 0xE0000000)) ^ ((s32) ((temp_a0 / 0x40) & 0xF000) >> 9));
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return func_80320250() == *(s32*)temp_a1;
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}
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s32 func_80320708(void) {
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u16 temp_t6;
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s32 addr;
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temp_t6 = ((s32) &gVolatileFlags.unk4 >> 0x10);
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addr = (s32) &gVolatileFlags.unk4 ^ temp_t6;
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return func_80320320() == *(s32*)(addr ^ temp_t6);
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}
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void volatileFlag_backupAll(void) {
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s32 i;
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u8 *dst;
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u8 *src;
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src = (u8 *) &gVolatileFlags;
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dst = glVolatileFlagsCopy;
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for(i = 0; i < gVolatileFlagsSize; i++){
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dst[i] = src[i];
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}
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}
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void volatileFlag_restoreAll(void) {
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s32 i;
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u8 *dst;
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u8 *src;
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src = glVolatileFlagsCopy;
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dst = (u8 *) &gVolatileFlags;
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for(i = 0; i < gVolatileFlagsSize; i++) {
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dst[i] = src[i];
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}
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}
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