#ifndef CGE_FILE_H
#define CGE_FILE_H

#include <stdint.h>
#include <stddef.h>

enum CgeFileMode {
    CGE_FILE_READ       = (1 << 0),
    CGE_FILE_WRITE      = (1 << 1),
    CGE_FILE_READWRITE  = (1 << 0) | (1 << 1),
    CGE_FILE_APPEND     = (1 << 4),
    CGE_FILE_TRUNCATE   = (1 << 5),
    CGE_FILE_CREATE     = (1 << 6),
    CGE_FILE_EXIST      = (1 << 7),
};

enum CgeFileSeek {
    CGE_FILE_SET,
    CGE_FILE_CUR,
    CGE_FILE_END,
};

enum CgeFileFlags {
    CGE_FILE_OK     = (1 << 0),
    CGE_FILE_ERROR  = (1 << 1),
    CGE_FILE_EOF    = (1 << 2),
};

enum CgeFileCode {
    CGE_FILE_EOK,             /* Success */
    CGE_FILE_EUNKNOWN,        /* Unknown or unexpected error */
    CGE_FILE_EOOM,            /* Out of memory */
    CGE_FILE_ENOSPC,          /* No space left on device */
    CGE_FILE_EINVAL,          /* Invalid mode/flag combination */
    CGE_FILE_ENOENT,          /* No such file or directory */
    CGE_FILE_EACCES,          /* Permission denied */
    CGE_FILE_EROFS,           /* Read-only file system */
    CGE_FILE_EEXIST,          /* File already exists */
    CGE_FILE_EISDIR,          /* Is a directory */
    CGE_FILE_EMFILE,          /* Too many open files */
    CGE_FILE_ENAMETOOLONG     /* File name too long */
};

typedef struct CgeFile CgeFile;

CgeFile *CgeFileNew(const char *path, int mode, int *result);
void CgeFileFree(CgeFile *file);
int CgeFileRead(CgeFile *file, char *buffer, size_t size, size_t *actual);
int CgeFileWrite(CgeFile *file, const char *buffer, size_t size,
                 size_t *actual);
int CgeFilePeek(CgeFile *file, char *buffer, size_t size, size_t *actual);
int CgeFileTell(CgeFile *file, int64_t *offset);
int CgeFileSeek(CgeFile *file, int64_t offset, int whence);
int CgeFileFlush(CgeFile *file);
int CgeFileSize(CgeFile *file, int64_t *size);
int CgeFileFlags(CgeFile *file, int *flags);
int CgeFileError(CgeFile *file);
int CgeFileEndOfFile(CgeFile *file);
int CgeFileClear(CgeFile *file);
int CgeFileErrorCode(CgeFile *file);

#endif /* CGE_FILE_H */