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/*
 * Copyright 2019,2020, The PLANIX Project
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 * 1. Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */


#include <stdio.h>
#include <stdlib.h>

#include "mgen.h"

static struct mgen_stream *
mgen_stream_create()
{
        struct mgen_stream * mf;
        mf = malloc(sizeof(struct mgen_stream));
        if (!mf)
                return NULL;

        mgen_ring_init(&(mf->ring),sizeof(MGEN_CHAR));


/*      mf->buf = malloc(MGEN_BUF_BLOCK_SIZE);
        if (!mf->buf){
                free (mf);
                return NULL;
        }*/


        mf->buf = NULL;
        mf->bufmax = 0;
        mf->buflast=0;
        mf->buffirst=0;
        mf->buf_size = MGEN_BUF_SIZE;
        mf->block_size = MGEN_BUF_BLOCK_SIZE;

        mf->line = 1;
        mf->col=1;
        mf->bufptr=0;
        mf->filename = NULL;
/*      mf->eof=0;*/
        return mf;
}

struct mgen_stream *
mgen_open_stream(FILE *infile, const char *prgname)
{
        struct mgen_stream * mf;
        mf = mgen_stream_create();
        if (!mf){
                return NULL;
        }
        mf->prgname = prgname;
        mf->infile = infile;
        return mf;
}

struct mgen_stream *
mgen_open(const char *filename, const char *prgname)
{
        FILE * infile;
        struct mgen_stream * mf;

        infile = fopen(filename,"rt");
        if (infile==NULL)
                return NULL;


        mf = mgen_open_stream(infile,prgname);
/*      mf = mgen_stream_create();*/
        if (!mf){
                (void)fclose(infile);
                return NULL;
        }

/*      mf->infile = infile;*/
        return mf;
}