diff options
Diffstat (limited to 'src/lottery_corner.c')
| -rw-r--r-- | src/lottery_corner.c | 128 |
1 files changed, 70 insertions, 58 deletions
diff --git a/src/lottery_corner.c b/src/lottery_corner.c index f073688e0..c2c25b9ac 100644 --- a/src/lottery_corner.c +++ b/src/lottery_corner.c @@ -1,109 +1,119 @@ #include "global.h" #include "lottery_corner.h" +#include "event_data.h" +#include "items.h" #include "rng.h" +#include "species.h" #include "string_util.h" -#include "var.h" +#include "text.h" extern u16 gScriptResult; extern u16 gSpecialVar_0x8004; -extern struct Pokemon gPlayerParty[6]; extern struct PokemonStorage gPokemonStorage; extern u16 gSpecialVar_0x8005; -extern u16 gUnknown_0840CB04[]; extern u16 gSpecialVar_0x8006; static EWRAM_DATA u16 sWinNumberDigit = 0; static EWRAM_DATA u16 sOtIdDigit = 0; +static const u16 sLotteryPrizes[] = +{ + ITEM_PP_UP, + ITEM_EXP_SHARE, + ITEM_MAX_REVIVE, + ITEM_MASTER_BALL, +}; + static u8 GetMatchingDigits(u16, u16); -void sub_8145A78(void) +void ResetLotteryCorner(void) { u16 rand = Random(); - sub_8145D14((Random() << 16) | rand); - VarSet(0x4045, 0); + SetLotteryNumber((Random() << 16) | rand); + VarSet(VAR_POKELOT_PRIZE, 0); } -void sub_8145AA4(u16 a) +void SetRandomLotteryNumber(u16 i) { u32 var = Random(); - - while(--a != 0xFFFF) - { + + while (--i != 0xFFFF) var = var * 1103515245 + 12345; - } - sub_8145D14(var); + + SetLotteryNumber(var); } -void sub_8145AEC(void) +void RetrieveLotteryNumber(void) { - u16 a = sub_8145D3C(); - gScriptResult = a; + u16 lottoNumber = GetLotteryNumber(); + gScriptResult = lottoNumber; } -//Script special function void PickLotteryCornerTicket(void) { u16 i; u16 j; u32 box; u32 slot; - + gSpecialVar_0x8004 = 0; slot = 0; box = 0; - for(i = 0; i < 6; i++) + for (i = 0; i < 6; i++) { struct Pokemon *pkmn = &gPlayerParty[i]; - + // UB: Too few arguments for function GetMonData - if(GetMonData(pkmn, MON_DATA_SPECIES) != 0) + if (GetMonData(pkmn, MON_DATA_SPECIES) != SPECIES_NONE) { - if(!GetMonData(pkmn, MON_DATA_IS_EGG)) + // do not calculate ticket values for eggs. + if (!GetMonData(pkmn, MON_DATA_IS_EGG)) { u32 otId = GetMonData(pkmn, MON_DATA_OT_ID); - u8 a = GetMatchingDigits(gScriptResult, otId); - - if(a > gSpecialVar_0x8004 && a > 1) + u8 numMatchingDigits = GetMatchingDigits(gScriptResult, otId); + + if (numMatchingDigits > gSpecialVar_0x8004 && numMatchingDigits > 1) { - gSpecialVar_0x8004 = a - 1; + gSpecialVar_0x8004 = numMatchingDigits - 1; box = 14; slot = i; } } } - else + else // pokemon are always arranged from populated spots first to unpopulated, so the moment a NONE species is found, that's the end of the list. break; } - - for(i = 0; i < 14; i++) + + // player has 14 boxes. + for (i = 0; i < 14; i++) { - for(j = 0; j < 0x1E; j++) + // player has 30 slots per box. + for (j = 0; j < 30; j++) { struct BoxPokemon *pkmn = &gPokemonStorage.boxes[i][j]; - + // UB: Too few arguments for function GetMonData - if(GetBoxMonData(pkmn, MON_DATA_SPECIES) != 0 && + if (GetBoxMonData(pkmn, MON_DATA_SPECIES) != SPECIES_NONE && !GetBoxMonData(pkmn, MON_DATA_IS_EGG)) { u32 otId = GetBoxMonData(pkmn, MON_DATA_OT_ID); - u8 a = GetMatchingDigits(gScriptResult, otId); - - if(a > gSpecialVar_0x8004 && a > 1) + u8 numMatchingDigits = GetMatchingDigits(gScriptResult, otId); + + if (numMatchingDigits > gSpecialVar_0x8004 && numMatchingDigits > 1) { - gSpecialVar_0x8004 = a - 1; + gSpecialVar_0x8004 = numMatchingDigits - 1; box = i; slot = j; } } } } - - if(gSpecialVar_0x8004 != 0) + + if (gSpecialVar_0x8004 != 0) { - gSpecialVar_0x8005 = gUnknown_0840CB04[gSpecialVar_0x8004 - 1]; - - if(box == 14) + gSpecialVar_0x8005 = sLotteryPrizes[gSpecialVar_0x8004 - 1]; + + if (box == 14) { gSpecialVar_0x8006 = 0; GetMonData(&gPlayerParty[slot], MON_DATA_NICKNAME, gStringVar1); @@ -120,14 +130,14 @@ void PickLotteryCornerTicket(void) static u8 GetMatchingDigits(u16 winNumber, u16 otId) { u8 i; - u8 matchingDigits = 0; //Why not just use i? - - for(i = 0; i < 5; i++) + u8 matchingDigits = 0; + + for (i = 0; i < 5; i++) { sWinNumberDigit = winNumber % 10; sOtIdDigit = otId % 10; - - if(sWinNumberDigit == sOtIdDigit) + + if (sWinNumberDigit == sOtIdDigit) { winNumber = winNumber / 10; otId = otId / 10; @@ -139,24 +149,26 @@ static u8 GetMatchingDigits(u16 winNumber, u16 otId) return matchingDigits; } -void sub_8145D14(u32 a) +// lottery numbers go from 0 to 99999, not 65535 (0xFFFF). interestingly enough, the function that calls GetLotteryNumber shifts to u16, so it cant be anything above 65535 anyway. +void SetLotteryNumber(u32 lotteryNum) { - u16 b = a >> 16; - u16 c = a; - - VarSet(0x404B, c); - VarSet(0x404C, b); + u16 lowNum = lotteryNum >> 16; + u16 highNum = lotteryNum; + + VarSet(VAR_POKELOT_RND1, highNum); + VarSet(VAR_POKELOT_RND2, lowNum); } -u32 sub_8145D3C(void) +u32 GetLotteryNumber(void) { - u16 var1 = VarGet(0x404B); - u16 var2 = VarGet(0x404C); - - return (var2 << 16) | var1; + u16 highNum = VarGet(VAR_POKELOT_RND1); + u16 lowNum = VarGet(VAR_POKELOT_RND2); + + return (lowNum << 16) | highNum; } -void unref_sub_8145D64(u16 a) +// interestingly, this may have been the original lottery number set function, but GF tried to change it to 32-bit later but didnt finish changing all calls as one GetLotteryNumber still shifts to u16. +void SetLotteryNumber16_Unused(u16 lotteryNum) { - sub_8145D14(a); + SetLotteryNumber(lotteryNum); } |