blockFileInternal.h (2554B)
1 #pragma once 2 3 static blockFileFunctionst *blockFileF = NULL; 4 5 /* TODO declare structs for private data and add a void pointer to the private data in the class declaration */ 6 7 // file format 8 // block 0 reserved > first 8 bytes: blockSize, next byte: block index size 32bits (0) or 64bits (1) 9 // block 1 data 10 // block 2 data 11 // ... 12 13 typedef struct { 14 u64 blockSize; 15 uint8_t blockIndexSize:1; // 0 32bits - 1 64bits TODO 32 only for now 16 } block0; 17 18 // block format 19 // byte 0: 20 // bit 0: 0 block in a chain - 1 first block in chain 21 // bit 1: 0 not compressed - 1 compressed with lz4 22 // dataSize u64 - size of the document, only first block 23 // nextBlock u32 or u64 - 0 means no next block 24 // (blCount u64 - how many block for this document) 25 // decompressedSize u32 - only when document is compressed, only first block 26 // data 27 // 28 // First block 29 // 1 or 3 30 // dataSize 31 // nextBlock 32 // decompressedSize 33 // data 34 // 35 // Other blocks 36 // 0 37 // nextBlock 38 // data 39 40 #define PACKED __attribute__((__packed__)) 41 42 typedef struct PACKED { 43 u8 chain:1; // 0 block in a chain - 1 first block in chain 44 u8 z:1; // 0 not compressed - 1 compressed with lz4 45 u64 nextBlock; 46 // end of header in chain block 47 u64 dataSize; 48 // end of header in not compressed document 49 uint32_t decompressedSize; 50 } blockt; 51 52 struct PACKED firstBlockHeader { 53 u8 chain:1; // 0 block in a chain - 1 first block in chain 54 u8 z:1; // 0 not compressed - 1 compressed with lz4 55 u64 nextBlock; 56 u64 dataSize; 57 }; 58 59 struct PACKED firstBlockHeaderCompressed { 60 u8 chain:1; // 0 block in a chain - 1 first block in chain 61 u8 z:1; // 0 not compressed - 1 compressed with lz4 62 u64 nextBlock; 63 u64 dataSize; 64 uint32_t decompressedSize; 65 }; 66 67 struct PACKED blockheader { 68 u8 chain:1; // 0 block in a chain - 1 first block in chain 69 u8 z:1; // 0 not compressed - 1 compressed with lz4 70 u64 nextBlock; 71 }; 72 73 74 75 // API 76 // open open file 77 // load load all documents in file 78 // add add data, return first block 79 // get get data by block 80 // remove remove data 81 // delete delete file 82 // close close file 83 84 #define uI u32 85 86 dArrayT(freeBlocks, uI); 87 88 typedef enum {READWRITE, APPEND} fmodet; 89 90 struct privateBlockFile { 91 u64 count; // block count 92 u64 blockSize; 93 freeBlocks freeBlocks; 94 const char *name; 95 char *freeName; 96 FILE *f; 97 fmodet fmode; 98 FILE *freeF; 99 flagsBlockFilet defaultFlags; 100 }; 101 102 // save freeBlocks in a file 103 104 #define fil (*(self->file)) 105 #define BLOCKSIZE 64 106