/*
  R : A Computer Language for Statistical Data Analysis
  Copyright (C) 1997-2004   Robert Gentleman, Ross Ihaka
                            and the R Development 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, write to the Free Software
  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307,
  U.S.A.
 */

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

#include "Defn.h"
#include "Startup.h"


/* Remove and process common command-line arguments
 *  Formally part of ../unix/sys-common.c.
 */

/*
  This copies the command line arguments to the Rstart
  structure. The memory is obtained from calloc, etc.
  since these are permanent and it is not intended that
  they be modified. This is why they are copied before
  being processed and removed from the list.

  We might store these as a SEXP. I have no strong opinion
  about this.
 */

/* Permanent copy of the command line arguments and the number
   of them passed to the application.
   These are populated via the routine R_set_command_line_arguments().
*/
static int    NumCommandLineArgs = 0;
static char **CommandLineArgs = NULL;


void
R_set_command_line_arguments(int argc, char **argv)
{
    int i;

    NumCommandLineArgs = argc;
    CommandLineArgs = (char**) calloc(argc, sizeof(char*));

    for(i = 0; i < argc; i++)
	CommandLineArgs[i] = strdup(argv[i]);
}


/*
  The .Internal which returns the command line arguments that are stored
  in global variables.
 */
SEXP
do_commandArgs(SEXP call, SEXP op, SEXP args, SEXP env)
{
    int i;
    SEXP vals;

    vals = allocVector(STRSXP, NumCommandLineArgs);
    for(i = 0; i < NumCommandLineArgs; i++)
	SET_STRING_ELT(vals, i, mkChar(CommandLineArgs[i]));
    return(vals);
}

void
R_common_command_line(int *pac, char **argv, Rstart Rp)
{
    int ac = *pac, newac = 1;	/* argv[0] is process name */
    int ierr;
    long lval;
    R_size_t value;
    char *p, **av = argv, msg[1024];
    Rboolean processing = TRUE;

    R_RestoreHistory = 1;
    while(--ac) {
	if(processing && **++av == '-') {
	    if (!strcmp(*av, "--version")) {
		PrintVersion(msg);
		R_ShowMessage(msg);
		exit(0);
	    }
	    else if(!strcmp(*av, "--args")) {
		/* copy this through for further processing */
		argv[newac++] = *av;
		processing = FALSE;
	    }
#if 0
	    else if(!strcmp(*av, "--print-nsize")) {
		Rprintf("%d\n", R_NSize);
		exit(0);
	    }
	    else if(!strcmp(*av, "--print-vsize")) {
		Rprintf("%d\n", R_VSize);
		exit(0);
	    }
#endif
	    else if(!strcmp(*av, "--save")) {
		Rp->SaveAction = SA_SAVE;
	    }
	    else if(!strcmp(*av, "--no-save")) {
		Rp->SaveAction = SA_NOSAVE;
	    }
	    else if(!strcmp(*av, "--restore")) {
		Rp->RestoreAction = SA_RESTORE;
	    }
	    else if(!strcmp(*av, "--no-restore")) {
		Rp->RestoreAction = SA_NORESTORE;
		R_RestoreHistory = 0;
	    }
	    else if(!strcmp(*av, "--no-restore-data")) {
		Rp->RestoreAction = SA_NORESTORE;
	    }
	    else if(!strcmp(*av, "--no-restore-history")) {
		R_RestoreHistory = 0;
	    }
	    else if (!strcmp(*av, "--silent") ||
		     !strcmp(*av, "--quiet") ||
		     !strcmp(*av, "-q")) {
		Rp->R_Quiet = TRUE;
	    }
	    else if (!strcmp(*av, "--vanilla")) {
		Rp->SaveAction = SA_NOSAVE; /* --no-save */
		Rp->RestoreAction = SA_NORESTORE; /* --no-restore */
		Rp->LoadSiteFile = FALSE; /* --no-site-file */
		Rp->LoadInitFile = FALSE; /* --no-init-file */
		R_RestoreHistory = 0;     /* --no-restore-history */
		Rp->NoRenviron = TRUE;
	    }
	    else if (!strcmp(*av, "--no-environ")) {
		Rp->NoRenviron = TRUE;
	    }
	    else if (!strcmp(*av, "--verbose")) {
		Rp->R_Verbose = TRUE;
	    }
	    else if (!strcmp(*av, "--slave") ||
		     !strcmp(*av, "-s")) {
		Rp->R_Quiet = TRUE;
		Rp->R_Slave = TRUE;
		Rp->SaveAction = SA_NOSAVE;
	    }
	    else if (!strcmp(*av, "--no-site-file")) {
		Rp->LoadSiteFile = FALSE;
	    }
	    else if (!strcmp(*av, "--no-init-file")) {
		Rp->LoadInitFile = FALSE;
	    }
	    else if (!strcmp(*av, "--debug-init")) {
	        Rp->DebugInitFile = TRUE;
	    }
	    else if (!strcmp(*av, "-save") ||
		     !strcmp(*av, "-nosave") ||
		     !strcmp(*av, "-restore") ||
		     !strcmp(*av, "-norestore") ||
		     !strcmp(*av, "-noreadline") ||
		     !strcmp(*av, "-quiet") ||
		     !strcmp(*av, "-nsize") ||
		     !strcmp(*av, "-vsize") ||
		     !strcmp(*av, "-V") ||
		     !strcmp(*av, "-n") ||
		     !strcmp(*av, "-v")) {
		snprintf(msg, 1024,
			 "WARNING: option %s no longer supported\n", *av);
		R_ShowMessage(msg);
	    }
            /* mop up --max/min/-n/vsize */
 	    else if(strncmp(*av+7, "size", 4) == 0) {
		if(strlen(*av) < 13) {
		    ac--; av++; p = *av;
		}
		else p = &(*av)[12];
		if (p == NULL) {
		    snprintf(msg, 1024,
			     "WARNING: no value given for %s\n", *av);
		    R_ShowMessage(msg);
		    break;
		}
		value = R_Decode2Long(p, &ierr);
		if(ierr) {
		    if(ierr < 0)
			snprintf(msg, 1024,
				 "WARNING: %s value is invalid: ignored\n",
				 *av);
		    else
			sprintf(msg, "WARNING: %s=%lu`%c': too large and ignored\n",
				*av, (unsigned long) value,
				(ierr == 1) ? 'M': ((ierr == 2) ? 'K' : 'k'));
		    R_ShowMessage(msg);

		} else {
		    if(!strncmp(*av, "--min-nsize", 11)) Rp->nsize = value;
		    if(!strncmp(*av, "--max-nsize", 11)) Rp->max_nsize = value;
		    if(!strncmp(*av, "--min-vsize", 11)) Rp->vsize = value;
		    if(!strncmp(*av, "--max-vsize", 11)) Rp->max_vsize = value;
		}
	    }
	    else if(strncmp(*av, "--max-ppsize", 12) == 0) {
		if(strlen(*av) < 14) {
		    ac--; av++; p = *av;
		} else p = &(*av)[13];
		if (p == NULL) {
		    R_ShowMessage("WARNING: no value given for -max-ppsize given\n");
		    break;
		}
		lval = strtol(p, &p, 10);
		if (lval < 0)
		    R_ShowMessage("WARNING: -max-ppsize value is negative: ignored\n");
		else if (lval < 10000)
		    R_ShowMessage("WARNING: -max-ppsize value is too small: ignored\n");

		else if (lval > 100000)
		    R_ShowMessage("WARNING: -max-ppsize value is too large: ignored\n");
		else Rp->ppsize = lval;
	    }
#if 0
	    else if(strncmp(*av, "--vsize", 7) == 0) {
		if(strlen(*av) < 9) {
		    ac--; av++; p = *av;
		}
		else
		    p = &(*av)[8];
		if (p == NULL) {
		    R_ShowMessage("WARNING: no vsize given\n");
		    break;
		}
		value = R_Decode2Long(p, &ierr);
		if(ierr) {
		    if(ierr < 0) /* R_common_badargs(); */
			sprintf(msg, "WARNING: --vsize value is invalid: ignored\n");
		    else
			sprintf(msg, "WARNING: --vsize=%ld`%c': too large and ignored\n",
				value,
				(ierr == 1) ? 'M': ((ierr == 2) ? 'K' : 'k'));
		    R_ShowMessage(msg);

		} else
		    Rp->vsize = value;
	    }
	    else if(strncmp(*av, "--nsize", 7) == 0) {
		if(strlen(*av) < 9) {
		    ac--; av++; p = *av;
		}
		else
		    p = &(*av)[8];
		if (p == NULL) {
		    R_ShowMessage("WARNING: no nsize given\n");
		    break;
		}
		value = R_Decode2Long(p, &ierr);
		if(ierr) {
		    if(ierr < 0) /* R_common_badargs(); */
			sprintf(msg, "WARNING: --nsize value is invalid: ignored\n");
		    else
		    sprintf(msg, "WARNING: --nsize=%lu`%c': too large and ignored\n",
			    value,
			    (ierr == 1) ? 'M': ((ierr == 2) ? 'K':'k'));
		    R_ShowMessage(msg);
		} else
		    Rp->nsize = value;
	    }
#endif
	    else { /* unknown -option */
		argv[newac++] = *av;
	    }
	}
	else {
	    argv[newac++] = *av;
	}
    }
    *pac = newac;
    return;
}
