#ifndef _STDIO_H
#define _STDIO_H

#include <stdarg.h>

typedef struct __sFILE FILE;
typedef unsigned int   size_t;

extern FILE *stdin;
extern FILE *stdout;
extern FILE *stderr;

int  putchar(int c);
int  puts(const char *s);
int  printf(const char *fmt, ...);
int  vprintf(const char *fmt, va_list ap);
int  sprintf(char *buf, const char *fmt, ...);
int  snprintf(char *buf, size_t n, const char *fmt, ...);
int  vsprintf(char *buf, const char *fmt, va_list ap);
int  vsnprintf(char *buf, size_t n, const char *fmt, va_list ap);
int  fprintf(FILE *stream, const char *fmt, ...);
int  vfprintf(FILE *stream, const char *fmt, va_list ap);
void perror(const char *prefix);
int  fputc(int c, FILE *stream);
int  fputs(const char *s, FILE *stream);
int  fflush(FILE *stream);
int  fclose(FILE *stream);

FILE *fopen(const char *path, const char *mode);
size_t fread(void *ptr, size_t size, size_t nmemb, FILE *stream);
size_t fwrite(const void *ptr, size_t size, size_t nmemb, FILE *stream);
int    fseek(FILE *stream, long offset, int whence);
long   ftell(FILE *stream);
int    feof(FILE *stream);
int    ferror(FILE *stream);
void   clearerr(FILE *stream);

#define SEEK_SET 0
#define SEEK_CUR 1
#define SEEK_END 2

#define EOF (-1)

int   getchar(void);
int   fgetc(FILE *stream);
char *fgets(char *buf, int n, FILE *stream);
int   ungetc(int c, FILE *stream);
#define getc(s) fgetc(s)

// Memory-backed FS: register a memory region as a named file so
// fopen can open it.  `cap` should be >= size; use cap > size for
// files that may grow on write.  `writable` controls whether
// fopen("...", "w") / "a" / "r+" succeeds.  Returns 0 on success,
// -1 on duplicate name or table full.
int  mfsRegister(const char *path, void *buf, size_t size, size_t cap,
                 int writable);
int  mfsUnregister(const char *path);

#endif