/*
 * stdio.h — standard I/O for nulsl-libc.
 *
 * Minimal for now: unbuffered writes to a file descriptor, plus ENOSYS
 * stubs for the buffered/formatting machinery that is still to come.
 * A FILE is just a file descriptor until we grow a real buffering layer.
 */

#ifndef _NULSL_STDIO_H
#define _NULSL_STDIO_H

#include <stddef.h>

#ifdef __cplusplus
extern "C" {
#endif

#define EOF (-1)

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

typedef struct nulsl_file FILE;

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

/* Real, unbuffered. */
int puts(const char *s);
int putchar(int c);

/* Stubs (see docs/architecture.md for the roadmap). */
int printf(const char *fmt, ...);
FILE *fopen(const char *path, const char *mode);
int fclose(FILE *f);
size_t fread(void *ptr, size_t size, size_t nmemb, FILE *f);
size_t fwrite(const void *ptr, size_t size, size_t nmemb, FILE *f);
int fflush(FILE *f);

#ifdef __cplusplus
}
#endif

#endif /* _NULSL_STDIO_H */