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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.

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

/* glibc2 needs this for strptime */

#define _XOPEN_SOURCE 

/* SunOS also requires this for strptime */

#define _XOPEN_VERSION 4 

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

#ifdef HAVE_CONFIG_H

#include "config.h"

#endif

#ifdef HAVE_STDLIB_H

#include <stdlib.h>

#endif

#ifdef HAVE_STRINGS_H

#include <strings.h>

#endif

#include "argtable2.h"

/* local error codes  */

enum {EMINCOUNT=1,EMAXCOUNT,EBADDATE};

static void resetfn(struct arg_date *parent)

    {

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

    parent->count=0;

    }

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

    {

    int errorcode = 0;

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

        errorcode = EMAXCOUNT;

    else if (!argval)

        {

        /* no argument value was given, leave parent->tmval[] unaltered but still count it */

        parent->count++;

        }

    else

        {

        const char *pend;

        struct tm tm = parent->tmval[parent->count];

        /* parse the given argument value, store result in parent->tmval[] */

        pend = strptime(argval, parent->format, &tm);

        if (pend && pend[0]=='\0')

            parent->tmval[parent->count++] = tm;

        else

            errorcode = EBADDATE;

        }

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

    return errorcode;

    }

static int checkfn(struct arg_date *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_date *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 EBADDATE:

            {

            struct tm tm;

            char buff[200];

            fprintf(fp,"illegal timestamp format \"%s\"\n",argval);

            bzero(&tm,sizeof(tm));

            strptime("1999-12-31 23:59:59","%F %H:%M:%S",&tm);

            strftime(buff, sizeof(buff), parent->format, &tm);

            printf("correct format is \"%s\"\n", buff);

            break;

            }

        }

    }

struct arg_date* arg_date0(const char* shortopts,

                           const char* longopts,

                           const char* format,

                           const char *datatype,

                           const char *glossary)

    {

    return arg_daten(shortopts,longopts,format,datatype,0,1,glossary);

    }

struct arg_date* arg_date1(const char* shortopts,

                           const char* longopts,

                           const char* format,

                           const char *datatype,

                           const char *glossary)

    {

    return arg_daten(shortopts,longopts,format,datatype,1,1,glossary);

    }

struct arg_date* arg_daten(const char* shortopts,

                           const char* longopts,

                           const char* format,

                           const char *datatype,

                           int mincount,

                           int maxcount,

                           const char *glossary)

    {

    size_t nbytes;

    struct arg_date *result;

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

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

    /* default time format is the national date format for the locale */

    if (!format)

        format = "%x";

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

           + maxcount*sizeof(struct tm);     /* storage for tmval[maxcount] array */

    /* allocate storage for the arg_date struct + tmval[] array.    */

    /* we use calloc because we want the tmval[] array zero filled. */

    result = (struct arg_date*)calloc(1,nbytes);

    if (result)

        {

        /* init the arg_hdr struct */

        result->hdr.flag      = ARG_HASVALUE;

        result->hdr.shortopts = shortopts;

        result->hdr.longopts  = longopts;

        result->hdr.datatype  = datatype ? datatype : format;

        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 tmval[maxcount] array immediately after the arg_date struct */

        result->tmval  = (struct tm*)(result+1);

        /* init the remaining arg_date member variables */

        result->count = 0;

        result->format = format;

        }

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

    return result;

    }