/*
 *  R : A Computer Language for Statistical Data Analysis
 *  Copyright (C) 1995, 1996  Robert Gentleman and Ross Ihaka
 *  Copyright (C) 1998--2013  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
 *  http://www.r-project.org/Licenses/
 */

#ifdef HAVE_CONFIG_H
# include <config.h>
#endif

#include "Defn.h"
#include <Internal.h>
#include <Rversion.h>

void attribute_hidden PrintGreeting(void)
{
    char buf[384];

    Rprintf("\n");
    PrintVersion_part_1(buf, 384);
    Rprintf("%s\n", buf);

    Rprintf(_("R is free software and comes with ABSOLUTELY NO WARRANTY.\n\
You are welcome to redistribute it under certain conditions.\n\
Type 'license()' or 'licence()' for distribution details.\n\n"));
    Rprintf(_("R is a collaborative project with many contributors.\n\
Type 'contributors()' for more information and\n\
'citation()' on how to cite R or R packages in publications.\n\n"));
    Rprintf(_("Type 'demo()' for some demos, 'help()' for on-line help, or\n\
'help.start()' for an HTML browser interface to help.\n\
Type 'q()' to quit R.\n\n"));
}

SEXP attribute_hidden do_version(SEXP call, SEXP op, SEXP args, SEXP env)
{
    SEXP value, names;
    char buf[128];

    checkArity(op, args);
    PROTECT(value = allocVector(VECSXP,14));
    PROTECT(names = allocVector(STRSXP,14));

    SET_STRING_ELT(names, 0, mkChar("platform"));
    SET_VECTOR_ELT(value, 0, mkString(R_PLATFORM));
    SET_STRING_ELT(names, 1, mkChar("arch"));
    SET_VECTOR_ELT(value, 1, mkString(R_CPU));
    SET_STRING_ELT(names, 2, mkChar("os"));
    SET_VECTOR_ELT(value, 2, mkString(R_OS));

    snprintf(buf, 128, "%s, %s", R_CPU, R_OS);
    SET_STRING_ELT(names, 3, mkChar("system"));
    SET_VECTOR_ELT(value, 3, mkString(buf));

    SET_STRING_ELT(names, 4, mkChar("status"));
    SET_VECTOR_ELT(value, 4, mkString(R_STATUS));
    SET_STRING_ELT(names, 5, mkChar("major"));
    SET_VECTOR_ELT(value, 5, mkString(R_MAJOR));
    SET_STRING_ELT(names, 6, mkChar("minor"));
    SET_VECTOR_ELT(value, 6, mkString(R_MINOR));
    SET_STRING_ELT(names, 7, mkChar("year"));
    SET_VECTOR_ELT(value, 7, mkString(R_YEAR));
    SET_STRING_ELT(names, 8, mkChar("month"));
    SET_VECTOR_ELT(value, 8, mkString(R_MONTH));
    SET_STRING_ELT(names, 9, mkChar("day"));
    SET_VECTOR_ELT(value, 9, mkString(R_DAY));
    SET_STRING_ELT(names, 10, mkChar("svn rev"));

    snprintf(buf, 128, "%d", R_SVN_REVISION);
    SET_VECTOR_ELT(value, 10, mkString(buf));
    SET_STRING_ELT(names, 11, mkChar("language"));
    SET_VECTOR_ELT(value, 11, mkString("R"));

    PrintVersionString(buf, 128);
    SET_STRING_ELT(names, 12, mkChar("version.string"));
    SET_VECTOR_ELT(value, 12, mkString(buf));
    SET_STRING_ELT(names, 13, mkChar("nickname"));
    SET_VECTOR_ELT(value, 13, mkString(R_NICK));

    setAttrib(value, R_NamesSymbol, names);
    UNPROTECT(2);
    return value;
}

void attribute_hidden PrintVersion(char *s, size_t len)
{
    PrintVersion_part_1(s, len);

    strcat(s, "\n"
	   "R is free software and comes with ABSOLUTELY NO WARRANTY.\n"
	   "You are welcome to redistribute it under the terms of the\n"
	   "GNU General Public License versions 2 or 3.\n"
	   "For more information about these matters see\n"
	   "http://www.gnu.org/licenses/.\n");
}

void attribute_hidden PrintVersionString(char *s, size_t len)
{
    if(R_SVN_REVISION <= 0) {// 'svn info' failed in ../../Makefile.in
	snprintf(s, len, "R version %s.%s %s (%s-%s-%s)",
		R_MAJOR, R_MINOR, R_STATUS, R_YEAR, R_MONTH, R_DAY);
    } else if(strlen(R_STATUS) == 0) {
	snprintf(s, len, "R version %s.%s (%s-%s-%s)",
		R_MAJOR, R_MINOR, R_YEAR, R_MONTH, R_DAY);
    } else if(strcmp(R_STATUS, "Under development (unstable)") == 0) {
	snprintf(s, len, "R %s (%s-%s-%s r%d)",
		R_STATUS, R_YEAR, R_MONTH, R_DAY, R_SVN_REVISION);
    } else {
	snprintf(s, len, "R version %s.%s %s (%s-%s-%s r%d)",
		R_MAJOR, R_MINOR, R_STATUS, R_YEAR, R_MONTH, R_DAY,
		R_SVN_REVISION);
    }
}

void attribute_hidden PrintVersion_part_1(char *s, size_t len)
{
#define SPRINTF_2(_FMT, _OBJ) snprintf(tmp, 128, _FMT, _OBJ); strcat(s, tmp)
    char tmp[128];

    PrintVersionString(s, len);
    if(strlen(R_NICK) != 0) {
	char nick[128];
	snprintf(nick, 128, " -- \"%s\"", R_NICK);
	strcat(s, nick);
    }
    SPRINTF_2("\nCopyright (C) %s The R Foundation for Statistical Computing\n",
	      R_YEAR);
/*  strcat(s, "ISBN 3-900051-07-0\n");  */
    SPRINTF_2("Platform: %s", R_PLATFORM);
    if(strlen(R_ARCH)) { SPRINTF_2("/%s", R_ARCH); }
    SPRINTF_2(" (%d-bit)\n", 8*(int)sizeof(void *));
}
