Function __CARDAllocBlock

src/dolphin/src/card/CARDBlock.c:74–121

}

s32 __CARDAllocBlock(s32 chan, u32 cBlock, CARDCallback callback) {
  CARDControl* card;
  u16* fat;
  u16 iBlock;
  u16 startBlock;
  u16 prevBlock;
  u16 count;

  card = &__CARDBlock[chan];
  if (!card->attached) {
    return CARD_RESULT_NOCARD;
  }

  fat = __CARDGetFatBlock(card);
  if (fat[3] < cBlock) {
    return CARD_RESULT_INSSPACE;
  }

  fat[3] -= cBlock;
  startBlock = 0xFFFF;
  iBlock = fat[4];
  count = 0;
  while (0 < cBlock) {
    if (card->cBlock - 5 < ++count) {
      return CARD_RESULT_BROKEN;
    }

    iBlock++;
    if (!CARDIsValidBlockNo(card, iBlock)) {
      iBlock = 5;
    }

    if (fat[iBlock] == 0x0000u) {
      if (startBlock == 0xFFFF) {
        startBlock = iBlock;
      } else {
        fat[prevBlock] = iBlock;
      }
      prevBlock = iBlock;
      fat[iBlock] = 0xFFFF;
      --cBlock;
    }
  }
  fat[4] = iBlock;
  card->startBlock = startBlock;

  return __CARDUpdateFatBlock(chan, fat, callback);
}

s32 __CARDFreeBlock(s32 chan, u16 nBlock, CARDCallback callback) {
  CARDControl* card;