/*
 *  R : A Computer Language for Statistical Data Analysis
 *  Copyright (C) 2004-2020 The R Core Team
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, a copy is available at
 *  https://www.R-project.org/Licenses/
 */

#ifndef R_INTERNET_MODULE_H
#define R_INTERNET_MODULE_H


#include <Rinternals.h>


typedef SEXP (*R_DownloadRoutine)(SEXP args);
typedef Rconnection (*R_NewUrlRoutine)(const char *description, const char * const mode,
				       SEXP headers, int method);
typedef Rconnection (*R_NewSockRoutine)(const char *host, int port, int server,
                                        int serverfd, const char * const mode,
                                        int timeout);
typedef Rconnection (*R_NewServSockRoutine)(int port);

typedef void * (*R_HTTPOpenRoutine)(const char *url, const char *agent,
				    const char *headers, const int cacheOK);
typedef int    (*R_HTTPReadRoutine)(void *ctx, char *dest, int len);
typedef void   (*R_HTTPCloseRoutine)(void *ctx);

typedef void * (*R_FTPOpenRoutine)(const char *url);
typedef int    (*R_FTPReadRoutine)(void *ctx, char *dest, int len);
typedef void   (*R_FTPCloseRoutine)(void *ctx);

typedef void   (*R_SockOpenRoutine)(int *port);
typedef void   (*R_SockListenRoutine)(int *sockp, char **buf, int *len);
typedef void   (*R_SockConnectRoutine)(int *port, char **host);
typedef void   (*R_SockCloseRoutine)(int *sockp);

typedef void   (*R_SockReadRoutine)(int *sockp, char **buf, int *maxlen);
typedef void   (*R_SockWriteRoutine)(int *sockp, char **buf, int *start, int *end, int *len);
typedef int    (*R_SockSelectRoutine)(int nsock, int *insockfd, int *ready, int *write, double timeout);

typedef int    (*R_HTTPDCreateRoutine)(const char *ip, int port);
typedef void   (*R_HTTPDStopRoutine)();

typedef SEXP (*R_CurlRoutine)(SEXP call, SEXP op, SEXP args, SEXP rho);

typedef struct {
    R_DownloadRoutine download;
    R_NewUrlRoutine   newurl;
    R_NewSockRoutine  newsock;
    R_NewServSockRoutine newservsock;

    R_HTTPOpenRoutine  HTTPOpen;
    R_HTTPReadRoutine  HTTPRead;
    R_HTTPCloseRoutine HTTPClose;

    R_FTPOpenRoutine   FTPOpen;
    R_FTPReadRoutine   FTPRead;
    R_FTPCloseRoutine  FTPClose;

    R_SockOpenRoutine     sockopen;
    R_SockListenRoutine   socklisten;
    R_SockConnectRoutine  sockconnect;
    R_SockCloseRoutine    sockclose;

    R_SockReadRoutine     sockread;
    R_SockWriteRoutine    sockwrite;
    R_SockSelectRoutine   sockselect;

    R_HTTPDCreateRoutine  HTTPDCreate;
    R_HTTPDStopRoutine    HTTPDStop;

    R_CurlRoutine curlVersion;
    R_CurlRoutine curlGetHeaders;
    R_CurlRoutine curlDownload;
    R_NewUrlRoutine   newcurlurl;
} R_InternetRoutines;

R_InternetRoutines *R_setInternetRoutines(R_InternetRoutines *routines);

#endif /* ifndef R_INTERNET_MODULE_H */