fm_io.h

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#pragma once
 
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
 
#include "fm_name.h"
 
#ifdef __cplusplus
extern "C" {
#endif

#define FM_NAME_BUF (FM_LIST_NAME_MAX + 1u)

typedef enum {
    FM_OK = 0,
    FM_ERR_NO_CARD,     
    FM_ERR_CARD_GONE,   
    FM_ERR_NOT_FOUND,   
    FM_ERR_EXISTS,      
    FM_ERR_FULL,        
    FM_ERR_DENIED,      
    FM_ERR_BUSY,        
    FM_ERR_FIXED,       
    FM_ERR_LOCKED,      
    FM_ERR_NAME,        
    FM_ERR_ARG,         
    FM_ERR_IO,          
    FM_ERR_NOT_EMPTY,   
    FM_ERR_SAME,        
    FM_ERR_TOO_BIG,     
    FM_ERR_ARMED,       
    FM_ERR_LOGGING,     
    FM_ERR_CANCELLED,   
    FM_ERR_COUNT
} fm_err_t;

typedef struct {
    const char *name;   
    uint64_t size;      
    bool is_dir;        
} fm_dirent_t;

typedef struct {
    uint64_t size;      
    bool is_dir;        
    int64_t mtime;      
} fm_stat_t;

typedef enum {
    FM_OPEN_READ = 0,   
    FM_OPEN_NEW         
} fm_mode_t;

typedef void (*fm_visit_fn)(const fm_dirent_t *entry, void *vctx);

typedef struct {
    bool (*mounted)(void *ctx);
    unsigned (*mounts)(void *ctx);
    bool (*hold)(void *ctx, unsigned mount);
    void (*release)(void *ctx);
    fm_err_t (*walk)(void *ctx, const char *dir, fm_visit_fn visit,
                     void *vctx, unsigned *unlisted);
    fm_err_t (*stat)(void *ctx, const char *path, fm_stat_t *out);
    fm_err_t (*mkdir)(void *ctx, const char *path);
    fm_err_t (*unlink)(void *ctx, const char *path);
    fm_err_t (*rmdir)(void *ctx, const char *path);
    fm_err_t (*rename)(void *ctx, const char *from, const char *to);
    fm_err_t (*open)(void *ctx, const char *path, fm_mode_t mode,
                     void **file);
    fm_err_t (*read)(void *ctx, void *file, uint8_t *buf, size_t cap,
                     size_t *got);
    fm_err_t (*write)(void *ctx, void *file, const uint8_t *buf, size_t len);
    fm_err_t (*sync)(void *ctx, void *file);
    fm_err_t (*close)(void *ctx, void *file);
    void *ctx;  
} fm_io_t;
 
#ifdef __cplusplus
}
#endif