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/*********************************************************************

This file is part of the argtable2 library.

Copyright (C) 1998-2001,2003-2008 Stewart Heitmann

sheitmann@users.sourceforge.net

The argtable2 library is free software; you can redistribute it and/or

modify it under the terms of the GNU Library General Public License as

published by the Free Software Foundation; either version 2 of the

License, or (at your option) any later version.

This software 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

Library General Public License for more details.

You should have received a copy of the GNU Library General Public

License along with this library; if not, write to the Free Software

Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,

USA.

**********************************************************************/

/* config.h must be included before anything else */

#ifdef HAVE_CONFIG_H

#include "config.h"

#endif

#ifdef HAVE_STDLIB_H

#include <stdlib.h>

#endif

#include "argtable2.h"

/* local error codes */

enum {EMINCOUNT=1,EMAXCOUNT,EBADDOUBLE};

static void resetfn(struct arg_dbl *parent)

    {

    /*printf("%s:resetfn(%p)\n",__FILE__,parent);*/

    parent->count=0;

    }

static int scanfn(struct arg_dbl *parent, const char *argval)

    {

    int errorcode = 0;

    if (parent->count == parent->hdr.maxcount)

        {

        /* maximum number of arguments exceeded */

        errorcode = EMAXCOUNT;

        }

    else if (!argval)

        {

        /* a valid argument with no argument value was given. */

        /* This happens when an optional argument value was invoked. */

        /* leave parent arguiment value unaltered but still count the argument. */

        parent->count++;

        }

    else

        {

        double val;

        char *end;

        /* extract double from argval into val */

        val = strtod(argval,&end);

        /* if success then store result in parent->dval[] array otherwise return error*/

        if (*end==0)

            parent->dval[parent->count++] = val;

        else

            errorcode = EBADDOUBLE;

        }

    /*printf("%s:scanfn(%p) returns %d\n",__FILE__,parent,errorcode);*/

    return errorcode;

    }

static int checkfn(struct arg_dbl *parent)

    {

    int errorcode = (parent->count < parent->hdr.mincount) ? EMINCOUNT : 0;

    /*printf("%s:checkfn(%p) returns %d\n",__FILE__,parent,errorcode);*/

    return errorcode;

    }

static void errorfn(struct arg_dbl *parent, FILE *fp, int errorcode, const char *argval, const char *progname)

    {

    const char *shortopts = parent->hdr.shortopts;

    const char *longopts  = parent->hdr.longopts;

    const char *datatype  = parent->hdr.datatype;

    /* make argval NULL safe */

    argval = argval ? argval : "";

    fprintf(fp,"%s: ",progname);

    switch(errorcode)

        {

        case EMINCOUNT:

            fputs("missing option ",fp);

            arg_print_option(fp,shortopts,longopts,datatype,"\n");

            break;

        case EMAXCOUNT:

            fputs("excess option ",fp);

            arg_print_option(fp,shortopts,longopts,argval,"\n");

            break;

        case EBADDOUBLE:

            fprintf(fp,"invalid argument \"%s\" to option ",argval);

            arg_print_option(fp,shortopts,longopts,datatype,"\n");

            break;

        }

    }

struct arg_dbl* arg_dbl0(const char* shortopts,

                               const char* longopts,

                               const char *datatype,

                               const char *glossary)

    {

    return arg_dbln(shortopts,longopts,datatype,0,1,glossary);

    }

struct arg_dbl* arg_dbl1(const char* shortopts,

                               const char* longopts,

                               const char *datatype,

                               const char *glossary)

    {

    return arg_dbln(shortopts,longopts,datatype,1,1,glossary);

    }

struct arg_dbl* arg_dbln(const char* shortopts,

                               const char* longopts,

                               const char *datatype,

                               int mincount,

                               int maxcount,

                               const char *glossary)

    {

    size_t nbytes;

    struct arg_dbl *result;

        /* foolproof things by ensuring maxcount is not less than mincount */

        maxcount = (maxcount<mincount) ? mincount : maxcount;

    nbytes = sizeof(struct arg_dbl)     /* storage for struct arg_dbl */

           + (maxcount+1) * sizeof(double);  /* storage for dval[maxcount] array plus one extra for padding to memory boundary */

    result = (struct arg_dbl*)malloc(nbytes);

    if (result)

        {

        size_t addr;

        size_t rem;

        /* init the arg_hdr struct */

        result->hdr.flag      = ARG_HASVALUE;

        result->hdr.shortopts = shortopts;

        result->hdr.longopts  = longopts;

        result->hdr.datatype  = datatype ? datatype : "<double>";

        result->hdr.glossary  = glossary;

        result->hdr.mincount  = mincount;

        result->hdr.maxcount  = maxcount;

        result->hdr.parent    = result;

        result->hdr.resetfn   = (arg_resetfn*)resetfn;

        result->hdr.scanfn    = (arg_scanfn*)scanfn;

        result->hdr.checkfn   = (arg_checkfn*)checkfn;

        result->hdr.errorfn   = (arg_errorfn*)errorfn;

        /* Store the dval[maxcount] array on the first double boundary that immediately follows the arg_dbl struct. */

        /* We do the memory alignment purely for SPARC and Motorola systems. They require floats and doubles to be  */

        /* aligned on natural boundaries */

        addr = (size_t)(result+1);

        rem  = addr % sizeof(double);

        result->dval  = (double*)(addr + sizeof(double) - rem);

        /* printf("addr=%p, dval=%p, sizeof(double)=%d rem=%d\n", addr, result->dval, (int)sizeof(double), (int)rem); */

        result->count = 0;

        }

    /*printf("arg_dbln() returns %p\n",result);*/

    return result;

    }