is_debug.c

#include "global.h"
#include "attributes.h"

typedef struct ISVDbg {
    /* 0x00 */ u32 magic; // "IS64"
    /* 0x04 */ u32 get;
    /* 0x08 */ u8 unk_08[0xC];
    /* 0x14 */ u32 put;
    /* 0x18 */ u8 unk_18[0x8];
    /* 0x20 */ u8 data[0xFFE0];
} ISVDbg; // size = 0x10000

#define gISVDbgPrnAdrs ((ISVDbg*)0xB3FF0000)
#define ASCII_TO_U32(a, b, c, d) ((u32)((a << 24) | (b << 16) | (c << 8) | (d << 0)))

#if DEBUG_FEATURES
OSPiHandle* sISVHandle; // official name : is_Handle

void isPrintfInit(void) {
    sISVHandle = osCartRomInit();
    osEPiWriteIo(sISVHandle, (u32)&gISVDbgPrnAdrs->put, 0);
    osEPiWriteIo(sISVHandle, (u32)&gISVDbgPrnAdrs->get, 0);
    osEPiWriteIo(sISVHandle, (u32)&gISVDbgPrnAdrs->magic, ASCII_TO_U32('I', 'S', '6', '4'));
}
#endif

void osSyncPrintfUnused(const char* fmt, ...) {
    va_list args;
    va_start(args, fmt);

#if DEBUG_FEATURES
    _Printf(is_proutSyncPrintf, NULL, fmt, args);
#endif

    va_end(args);
}

void osSyncPrintf(const char* fmt, ...) {
    va_list args;
    va_start(args, fmt);

#if DEBUG_FEATURES
    _Printf(is_proutSyncPrintf, NULL, fmt, args);
#endif

    va_end(args);
}

// assumption
void rmonPrintf(const char* fmt, ...) {
    va_list args;
    va_start(args, fmt);

#if DEBUG_FEATURES
    _Printf(is_proutSyncPrintf, NULL, fmt, args);
#endif

    va_end(args);
}

#if OOT_VERSION < PAL_1_0
void func_800015F4(void) {
}
#endif

#if DEBUG_FEATURES
void* is_proutSyncPrintf(void* arg, const char* str, size_t count) {
    u32 data;
    s32 pos;
    s32 start;
    s32 end;

    osEPiReadIo(sISVHandle, (u32)&gISVDbgPrnAdrs->magic, &data);
    if (data != ASCII_TO_U32('I', 'S', '6', '4')) {
        return (void*)1;
    }
    osEPiReadIo(sISVHandle, (u32)&gISVDbgPrnAdrs->get, &data);
    pos = data;
    osEPiReadIo(sISVHandle, (u32)&gISVDbgPrnAdrs->put, &data);
    start = data;
    end = start + count;
    if (end >= 0xFFE0) {
        end -= 0xFFE0;
        if (pos < end || start < pos) {
            return (void*)1;
        }
    } else {
        if (start < pos && pos < end) {
            return (void*)1;
        }
    }
    while (count) {
        u32 addr = (u32)&gISVDbgPrnAdrs->data + (start & 0xFFFFFFC);
        s32 shift = ((3 - (start & 3)) * 8);

        if (*str) {
            osEPiReadIo(sISVHandle, addr, &data);
            osEPiWriteIo(sISVHandle, addr, (*str << shift) | (data & ~(0xFF << shift)));

            start++;
            if (start >= 0xFFE0) {
                start -= 0xFFE0;
            }
        }
        count--;
        str++;
    }
    osEPiWriteIo(sISVHandle, (u32)&gISVDbgPrnAdrs->put, start);

    return (void*)1;
}

NORETURN void func_80002384(const char* exp, const char* file, int line) {
    osSyncPrintf("File:%s Line:%d  %s \n", file, line, exp);
    while (true) {
        ;
    }
}
#endif