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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_STRING_H

#include <string.h>

#endif

#ifdef HAVE_STDLIB_H

#include <stdlib.h>

#endif

#include "argtable2.h"

#ifdef WIN32

# define FILESEPARATOR '\\'

#else

# define FILESEPARATOR '/'

#endif

/* local error codes */

enum {EMINCOUNT=1,EMAXCOUNT};

static void resetfn(struct arg_file *parent)

    {

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

    parent->count=0;

    }

/* Returns ptr to the base filename within *filename */

static const char* arg_basename(const char *filename)

    {

    const char *result = (filename ? strrchr(filename,FILESEPARATOR) : NULL);

    if (result)

        result++;

    else

        result = filename;

    return result;

    }

/* Returns ptr to the file extension within *filename */

static const char* arg_extension(const char *filename)

    {

    const char *result = (filename ? strrchr(filename,'.') : NULL);

    if (filename && !result)

        result = filename+strlen(filename);

    return result;

    }

static int scanfn(struct arg_file *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

        {

        parent->filename[parent->count]  = argval;

        parent->basename[parent->count]  = arg_basename(argval);

        parent->extension[parent->count] = arg_extension(argval);

        parent->count++;

        }

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

    return errorcode;

    }

static int checkfn(struct arg_file *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_file *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;

        default:

            fprintf(fp,"unknown error at \"%s\"\n",argval);

        }

    }

struct arg_file* arg_file0(const char* shortopts,

                           const char* longopts,

                           const char *datatype,

                           const char *glossary)

    {

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

    }

struct arg_file* arg_file1(const char* shortopts,

                           const char* longopts,

                           const char *datatype,

                           const char *glossary)

    {

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

    }

struct arg_file* arg_filen(const char* shortopts,

                           const char* longopts,

                           const char *datatype,

                           int mincount,

                           int maxcount,

                           const char *glossary)

    {

    size_t nbytes;

    struct arg_file *result;

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

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

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

           + sizeof(char*) * maxcount    /* storage for filename[maxcount] array */

           + sizeof(char*) * maxcount    /* storage for basename[maxcount] array */

           + sizeof(char*) * maxcount;   /* storage for extension[maxcount] array */

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

    if (result)

        {

        int i;

        /* init the arg_hdr struct */

        result->hdr.flag      = ARG_HASVALUE;

        result->hdr.shortopts = shortopts;

        result->hdr.longopts  = longopts;

        result->hdr.glossary  = glossary;

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

        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 filename,basename,extension arrays immediately after the arg_file struct */

        result->filename  = (const char**)(result+1);

        result->basename  = result->filename + maxcount;

        result->extension = result->basename + maxcount;

        result->count = 0;

        /* foolproof the string pointers by initialising them with empty strings */

        for (i=0; i<maxcount; i++)

            {

            result->filename[i] = "";

            result->basename[i] = "";

            result->extension[i] = "";

            }

        }

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

    return result;

    }