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| Source at commit 1091 created 12 years 10 months ago. By meklort, Initial FDisk Partiton scheme implimentation. | |
|---|---|
| 1 | /*␊ |
| 2 | * Copyright (c) 2011 Evan Lojewski. All rights reserved.␊ |
| 3 | *␊ |
| 4 | */␊ |
| 5 | #include <GUIDPartition.hpp>␊ |
| 6 | ␊ |
| 7 | ␊ |
| 8 | GUIDPartition::GUIDPartition(Disk* disk, UInt8 partitionNumber) : Partition(disk, partitionNumber)␊ |
| 9 | {␊ |
| 10 | mDisk = disk;␊ |
| 11 | mNumSectors = 0;␊ |
| 12 | mBeginSector = 0;␊ |
| 13 | mPartitionNumber = partitionNumber;␊ |
| 14 | mNumPartitions = 0;␊ |
| 15 | ␊ |
| 16 | if(mDisk)␊ |
| 17 | {␊ |
| 18 | // read in lba1, this contains the partition map if it's GPT␊ |
| 19 | mDisk->Read(1, 1, mLBABUffer);␊ |
| 20 | mGPTHeader = (gpt_hdr*)mLBABUffer;␊ |
| 21 | }␊ |
| 22 | else␊ |
| 23 | {␊ |
| 24 | mGPTHeader = NULL;␊ |
| 25 | }␊ |
| 26 | ␊ |
| 27 | if(isGPTDisk())␊ |
| 28 | {␊ |
| 29 | mNumPartitions = mGPTHeader->hdr_entries;␊ |
| 30 | }␊ |
| 31 | ␊ |
| 32 | mGPTHeader = NULL;␊ |
| 33 | ␊ |
| 34 | if(mPartitionNumber >= 0 && mPartitionNumber < mNumPartitions)␊ |
| 35 | {␊ |
| 36 | // read in partition entry.␊ |
| 37 | mDisk->Read(2 + mPartitionNumber, 1, mLBABUffer);␊ |
| 38 | ␊ |
| 39 | mGPTEntry = (gpt_ent*) mLBABUffer;␊ |
| 40 | ␊ |
| 41 | mNumSectors = mGPTEntry->ent_lba_end - mGPTEntry->ent_lba_start;␊ |
| 42 | mBeginSector = mGPTEntry->ent_lba_start;␊ |
| 43 | //mUUID = mGPTEntry->ent_uuid;␊ |
| 44 | }␊ |
| 45 | }␊ |
| 46 | ␊ |
| 47 | GUIDPartition::~GUIDPartition()␊ |
| 48 | {␊ |
| 49 | ␊ |
| 50 | }␊ |
| 51 | ␊ |
| 52 | ␊ |
| 53 | bool GUIDPartition::isGPTDisk()␊ |
| 54 | {␊ |
| 55 | static bool status = false;␊ |
| 56 | ␊ |
| 57 | if(status) return status;␊ |
| 58 | ␊ |
| 59 | if(!mGPTHeader) return false;␊ |
| 60 | ␊ |
| 61 | if(mGPTHeader->hdr_sig[0] == 'E' &&␊ |
| 62 | mGPTHeader->hdr_sig[1] == 'F' &&␊ |
| 63 | mGPTHeader->hdr_sig[2] == 'I' &&␊ |
| 64 | mGPTHeader->hdr_sig[3] == ' ' &&␊ |
| 65 | mGPTHeader->hdr_sig[4] == 'P' &&␊ |
| 66 | mGPTHeader->hdr_sig[5] == 'A' &&␊ |
| 67 | mGPTHeader->hdr_sig[6] == 'R' &&␊ |
| 68 | mGPTHeader->hdr_sig[7] == 'T') return true;␊ |
| 69 | ␊ |
| 70 | return false;␊ |
| 71 | }␊ |
| 72 | |
