Starship/src/libultra/os/rdbsend.c

#include "PR/os_internal.h"
#include "PR/rdb.h"
#include "PR/R4300.h"

extern rdbPacket* __osRdb_IP6_Data;
extern u32 __osRdb_IP6_Size;
extern u32 __osRdb_IP6_Ct;
extern u32 __osRdb_IP6_CurWrite;

u32 __osRdb_IP6_Empty = 1;

#define MIN(a, b) (((a) < (b)) ? (a) : (b))

u32 __osRdbSend(u8* buf, u32 size, u32 type) {
    rdbPacket* pPtr;
    rdbPacket pkt;
    u32 len;
    u32 c;
    u32 inCt = 0;
    u32 needFirst = 0;
    u32 mask;
    u32 sent = 0;

    mask = __osDisableInt();

    if (__osRdb_IP6_Empty != 0) {
        __osRdb_IP6_Empty = 0;
        pkt.type = type;

        len = MIN(size, sizeof(pkt.buf));

        pkt.length = len;

        c = 0;
        while (c < len) {
            pkt.buf[c++] = buf[inCt++];
        }

        size -= len;
        sent = len;
        needFirst = 1;
    }

    while (size != 0 && __osRdb_IP6_Ct < __osRdb_IP6_Size) {
        len = MIN(size, sizeof(pPtr->buf));

        pPtr = &__osRdb_IP6_Data[__osRdb_IP6_CurWrite];

        pPtr->type = type;
        pPtr->length = len;

        c = 0;
        while (c < len) {
            pPtr->buf[c++] = buf[inCt++];
        }

        __osRdb_IP6_CurWrite++;
        if (__osRdb_IP6_CurWrite >= __osRdb_IP6_Size) {
            __osRdb_IP6_CurWrite = 0;
        }

        __osRdb_IP6_Ct++;
        size -= len;
        sent += len;
    }

    if (needFirst) {
        *(u32*) RDB_BASE_REG = *(u32*) &pkt;
    }
    __osRestoreInt(mask);

    return sent;
}