// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Our base String stream classes.  We implement these to
 * be based on Glib::ustring
 *
 * Authors:
 *   Bob Jamison <rjamison@titan.com>
 *
 * Copyright (C) 2004 Inkscape.org
 *
 * Released under GNU GPL v2+, read the file 'COPYING' for more information.
 */


#include "uristream.h"
#include "io/sys.h"


namespace Inkscape
{
namespace IO
{

//#########################################################################
//# F I L E    I N P U T    S T R E A M
//#########################################################################


/**
 *
 */
FileInputStream::FileInputStream(FILE *source)
    : inf(source)
{
    if (!inf) {
        Glib::ustring err = "FileInputStream passed NULL";
        throw StreamException(err);
    }
}

/**
 *
 */
FileInputStream::~FileInputStream()
{
    close();
}

/**
 * Returns the number of bytes that can be read (or skipped over) from
 * this input stream without blocking by the next caller of a method for
 * this input stream.
 */
int FileInputStream::available()
{
    return 0;
}


/**
 *  Closes this input stream and releases any system resources
 *  associated with the stream.
 */
void FileInputStream::close()
{
            if (!inf)
                return;
            fflush(inf);
            fclose(inf);
            inf=nullptr;
}

/**
 * Reads the next byte of data from the input stream.  -1 if EOF
 */
int FileInputStream::get()
{
    int retVal = -1;
                if (!inf || feof(inf))
                {
                    retVal = -1;
                }
                else
                {
                    retVal = fgetc(inf);
                }

    return retVal;
}




//#########################################################################
//#  F I L E    O U T P U T    S T R E A M
//#########################################################################

FileOutputStream::FileOutputStream(FILE *fp)
    : ownsFile(false)
    , outf(fp)
{
    if (!outf) {
        Glib::ustring err = "FileOutputStream given null file ";
        throw StreamException(err);
    }
}

/**
 *
 */
FileOutputStream::~FileOutputStream()
{
    close();
}

/**
 * Closes this output stream and releases any system resources
 * associated with this stream.
 */
void FileOutputStream::close()
{
            if (!outf)
                return;
            fflush(outf);
            if ( ownsFile )
                fclose(outf);
            outf=nullptr;
}

/**
 *  Flushes this output stream and forces any buffered output
 *  bytes to be written out.
 */
void FileOutputStream::flush()
{
            if (!outf)
                return;
            fflush(outf);
}

/**
 * Writes the specified byte to this output stream.
 */
int FileOutputStream::put(char ch)
{
    unsigned char uch;

            if (!outf)
                return -1;
            uch = (unsigned char)(ch & 0xff);
            if (fputc(uch, outf) == EOF) {
                Glib::ustring err = "ERROR writing to file ";
                throw StreamException(err);
            }

    return 1;
}





} // namespace IO
} // namespace Inkscape


//#########################################################################
//# E N D    O F    F I L E
//#########################################################################

// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :