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https://github.com/zeldaret/oot
synced 2026-06-16 06:45:49 -04:00
libultra cleanup (#215)
* cleanup libultra * fixes - use quotes instead of <> for includes - add macros for zelda specific thread priorities - fix Makefile - properly format the remaining pfs structs * fix button macros + add CHECK_BTN_ANY/CHECK_BTN_ALL * remove ULTRA_ABS * fix includes * update z_player.c/z_lib.c + run format.sh * merge upstream/master * fix include in En_Goroiwa * fix includes
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@@ -0,0 +1,65 @@
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#include "global.h"
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// Valid addr up to 0x7FF
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// It's the address of a block of 0x20 bytes in the mempak
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// So that means the whole mempak has a 16-bit address space
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u8 __osContAddressCrc(u16 addr) {
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u32 addr32 = addr;
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u32 ret = 0;
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u32 bit;
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s32 i;
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for (bit = 0x400; bit; bit /= 2) {
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ret *= 2;
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if (addr32 & bit) {
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if (ret & 0x20) {
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ret ^= 0x14;
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} else {
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++ret;
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}
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} else {
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if (ret & 0x20) {
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ret ^= 0x15;
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}
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}
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}
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for (i = 0; i < 5; ++i) {
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ret <<= 1;
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if (ret & 0x20) {
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ret ^= 0x15;
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}
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}
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return ret & 0x1f;
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}
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u8 __osContDataCrc(u8* data) {
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s32 ret;
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u32 bit;
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u32 byte;
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ret = 0;
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for (byte = 0x20; byte; --byte, ++data) {
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for (bit = 0x80; bit; bit /= 2) {
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ret *= 2;
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if ((*data & bit) != 0) {
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if ((ret & 0x100) != 0) {
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ret ^= 0x84;
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} else {
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++ret;
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}
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} else {
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if (ret & 0x100) {
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ret ^= 0x85;
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}
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}
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}
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}
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do {
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ret *= 2;
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if (ret & 0x100) {
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ret ^= 0x85;
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}
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++byte;
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} while (byte < 8U);
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return ret;
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}
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