/*
 * io.h
 *
 * Communication between PSSE and the outside world, via libcurl.
 *
 * (c) 2019 Simon Brooke <simon@journeyman.cc>
 * Licensed under GPL version 2.0, or, at your option, any later version.
 */

#ifndef __psse_io_io_h
#define __psse_io_io_h

#include <curl/curl.h>
#include <stdbool.h>

/*
 * wide characters
 */
#include <wctype.h>

#include "io/fopen.h"
#include "memory/pointer.h"

extern CURLSH *io_share;

int initialise_io();
struct pso_pointer initialise_default_streams(struct pso_pointer frame_pointer,
											  struct pso_pointer env);

#define C_IO_IN L"*in*"
#define C_IO_OUT L"*out*"
#define C_IO_LOG L"*log*"
#define C_IO_READBASE L"*read_base*"
#define C_IO_READTABLE L"*read_table*"

extern struct pso_pointer lisp_io_in;
extern struct pso_pointer lisp_io_out;
extern struct pso_pointer lisp_io_log;
extern struct pso_pointer lisp_io_readbase;
extern struct pso_pointer lisp_io_read_table;

extern struct pso_pointer lisp_stdin;
extern struct pso_pointer lisp_stdout;
extern struct pso_pointer lisp_stderr;

#define INITIAL_PROMPT L"psse ]"
#define C_IO_PROMPT L"*prompt*"

extern struct pso_pointer lisp_io_prompt;

URL_FILE *file_to_url_file(FILE *f);
wint_t url_fgetwc(URL_FILE *input);
wint_t url_ungetwc(wint_t wc, URL_FILE *input);

struct pso_pointer push_back_character(struct pso_pointer c,
									   struct pso_pointer r);

struct pso_pointer get_default_stream(bool inputp, struct pso_pointer env);

URL_FILE *stream_get_url_file(struct pso_pointer s);

struct pso_pointer lisp_close(struct pso_pointer frame_pointer);
struct pso_pointer lisp_open(struct pso_pointer frame_pointer);
struct pso_pointer lisp_slurp(struct pso_pointer frame_pointer);

#endif