Source fs/partition.h

// SafeC Standard Library — MBR Partition Table Parser
// Freestanding-safe.
#pragma once
#include <std/fs/block.h>

#define PART_MAX  4       // MBR has 4 primary partitions

#define PART_TYPE_EMPTY   0x00
#define PART_TYPE_FAT32   0x0B
#define PART_TYPE_FAT32X  0x0C   // FAT32 with LBA
#define PART_TYPE_LINUX   0x83
#define PART_TYPE_SWAP    0x82

namespace std {

struct PartEntry {
    unsigned char  status;      // 0x80 = bootable
    unsigned char  type;        // partition type
    unsigned long  lba_start;   // first LBA (host byte order)
    unsigned long  sector_count;
};

struct PartTable {
    struct PartEntry entries[PART_MAX];
    int              count;     // number of valid (non-empty) entries

    // Access entry by index (0-3).
    // Returns a reference into entries[], or empty (null) if idx is out of
    // range — check entry.type != PART_TYPE_EMPTY too, for a valid index
    // that just has no partition recorded there.
    const ?&PartEntry get(int idx) const;

    // Read and parse the MBR from sector 0 of `dev` into this table.
    // Returns 0 on success, -1 on read error or bad signature.
    int read(&BlockDevice dev);
};

} // namespace std