| 129 | } |
| 130 | |
| 131 | static s32 VerifyFAT(CARDControl* card, int* outCurrent) |
| 132 | { |
| 133 | u16* fat[2]; |
| 134 | u16* fatp; |
| 135 | u16 nBlock; |
| 136 | u16 cFree; |
| 137 | int i; |
| 138 | u16 checkSum; |
| 139 | u16 checkSumInv; |
| 140 | int errors; |
| 141 | int current; |
| 142 | |
| 143 | current = errors = 0; |
| 144 | for (i = 0; i < 2; i++) |
| 145 | { |
| 146 | fatp = fat[i] = (u16*)((u8*)card->workArea + (3 + i) * CARD_SYSTEM_BLOCK_SIZE); |
| 147 | |
| 148 | __CARDCheckSum(&fatp[CARD_FAT_CHECKCODE], CARD_SYSTEM_BLOCK_SIZE - sizeof(u32), &checkSum, |
| 149 | &checkSumInv); |
| 150 | if (fatp[CARD_FAT_CHECKSUM] != checkSum || fatp[CARD_FAT_CHECKSUMINV] != checkSumInv) |
| 151 | { |
| 152 | ++errors; |
| 153 | current = i; |
| 154 | card->currentFat = 0; |
| 155 | continue; |
| 156 | } |
| 157 | |
| 158 | cFree = 0; |
| 159 | for (nBlock = CARD_NUM_SYSTEM_BLOCK; nBlock < card->cBlock; nBlock++) |
| 160 | { |
| 161 | if (fatp[nBlock] == CARD_FAT_AVAIL) |
| 162 | { |
| 163 | cFree++; |
| 164 | } |
| 165 | } |
| 166 | if (cFree != fatp[CARD_FAT_FREEBLOCKS]) |
| 167 | { |
| 168 | ++errors; |
| 169 | current = i; |
| 170 | card->currentFat = 0; |
| 171 | continue; |
| 172 | } |
| 173 | } |
| 174 | |
| 175 | if (0 == errors) |
| 176 | { |
| 177 | if (card->currentFat == 0) |
| 178 | { |
| 179 | if (((s16)fat[0][CARD_FAT_CHECKCODE] - (s16)fat[1][CARD_FAT_CHECKCODE]) < 0) |
| 180 | { |
| 181 | current = 0; |
| 182 | } |
| 183 | else |
| 184 | { |
| 185 | current = 1; |
| 186 | } |
| 187 | card->currentFat = fat[current]; |
| 188 | memcpy(fat[current], fat[current ^ 1], CARD_SYSTEM_BLOCK_SIZE); |
no test coverage detected