kfile.h

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#ifndef KERN_KFILE_H
#define KERN_KFILE_H

#include <cfg/compiler.h>
#include <cfg/debug.h>
#include <cfg/macros.h>

/* fwd decl */
struct KFile;

typedef int32_t kfile_off_t; 

typedef enum KSeekMode
{
    KSM_SEEK_SET, 
    KSM_SEEK_CUR, 
    KSM_SEEK_END, 
} KSeekMode;

typedef size_t (*ReadFunc_t) (struct KFile *fd, void *buf, size_t size);

typedef size_t (*WriteFunc_t) (struct KFile *fd, const void *buf, size_t size);

typedef kfile_off_t (*SeekFunc_t) (struct KFile *fd, kfile_off_t offset, KSeekMode whence);

typedef struct KFile * (*ReOpenFunc_t) (struct KFile *fd);

typedef int (*CloseFunc_t) (struct KFile *fd);

typedef int (*FlushFunc_t) (struct KFile *fd);

typedef int (*ErrorFunc_t) (struct KFile *fd);

typedef void (*ClearErrFunc_t) (struct KFile *fd);
/* \} */

typedef struct KFile
{
    ReadFunc_t     read;
    WriteFunc_t    write;
    ReOpenFunc_t   reopen;
    CloseFunc_t    close;
    SeekFunc_t     seek;
    FlushFunc_t    flush;
    ErrorFunc_t    error;
    ClearErrFunc_t clearerr;
    DB(id_t _type); 

    /* NOTE: these must _NOT_ be size_t on 16bit CPUs! */
    uint32_t seek_pos;
    uint32_t size;
} KFile;

kfile_off_t kfile_genericSeek(struct KFile *fd, kfile_off_t offset, KSeekMode whence);

struct KFile * kfile_genericReopen(struct KFile *fd);

int kfile_putc(int c, struct KFile *fd); 
int kfile_getc(struct KFile *fd);  
int kfile_printf(struct KFile *fd, const char *format, ...);
int kfile_print(struct KFile *fd, const char *s);
int kfile_gets(struct KFile *fd, char *buf, int size);
int kfile_gets_echo(struct KFile *fd, char *buf, int size, bool echo);

INLINE size_t kfile_read(struct KFile *fd, void *buf, size_t size)
{
    ASSERT(fd->read);
    return fd->read(fd, buf, size);
}

INLINE size_t kfile_write(struct KFile *fd, const void *buf, size_t size)
{
    ASSERT(fd->write);
    return fd->write(fd, buf, size);
}

INLINE KFile * kfile_reopen(struct KFile *fd)
{
    ASSERT(fd->reopen);
    return fd->reopen(fd);
}

INLINE int kfile_close(struct KFile *fd)
{
    ASSERT(fd->close);
    return fd->close(fd);
}

INLINE kfile_off_t kfile_seek(struct KFile *fd, kfile_off_t offset, KSeekMode whence)
{
    ASSERT(fd->seek);
    return fd->seek(fd, offset, whence);
}

INLINE int kfile_flush(struct KFile *fd)
{
    ASSERT(fd->flush);
    return fd->flush(fd);
}

INLINE int kfile_error(struct KFile *fd)
{
    ASSERT(fd->error);
    return fd->error(fd);
}

INLINE void kfile_clearerr(struct KFile *fd)
{
    ASSERT(fd->clearerr);
    fd->clearerr(fd);
}
/* \} */

bool kfile_test(KFile *fd, uint8_t *test_buf, uint8_t *save_buf, size_t size);

#endif /* KERN_KFILE_H */