mkbookimg_internal.h

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#pragma once
 
#include <fcntl.h>
#include <stddef.h>
#include <stdint.h>
 
#include "ra8_attributes.h"
#include "ra8_fs.h"
 
#ifndef O_CLOEXEC
#define O_CLOEXEC (0)
#endif
 
#ifndef O_DIRECTORY
#define O_DIRECTORY (0)
#endif
 
#ifndef O_NOFOLLOW
#define O_NOFOLLOW (0)
#endif

typedef enum : uint32_t {
  k_block_size           = 512U,        
  k_img_sectors          = 131072U,     
  k_max_books            = 32U,         
  k_stream_chunk_bytes   = 16U * 1024U, 
  k_host_path_cap        = 4096U,       
  k_host_name_cap        = 256U,        
  k_temp_create_attempts = 128U,        
  k_decimal_u64_digits   = 20U,         
  k_decimal_base         = 10U,         
  k_output_create_mode   = 0666U,       
} mkbookimg_limit_t;

typedef struct {
  uint64_t block_count; 
  uint32_t block_size;  
  int      fd;          
  bool     io_failed;   
} mkbookimg_disk_t;

RA8_PRIV void priv_mkbookimg_diag(const char* text);

RA8_PRIV void priv_mkbookimg_diag_u64(uint64_t value);

RA8_PRIV bool priv_mkbookimg_pread_exact(int fd, uint64_t offset, uint8_t* bytes, size_t length);

RA8_PRIV bool priv_mkbookimg_build_image(const ra8_fs_backend_t* backend,
                                         char**                  argv,
                                         int                     book_count,
                                         const mkbookimg_disk_t* disk);