shithub: riscv

ref: b86a12149ade500326a238753c31b6e0178d3b5b
dir: /sys/src/cmd/gs/src/zfbcp.c/

/* Copyright (C) 1994, 2000 Aladdin Enterprises.  All rights reserved.
  
  This software is provided AS-IS with no warranty, either express or
  implied.
  
  This software is distributed under license and may not be copied,
  modified or distributed except as expressly authorized under the terms
  of the license contained in the file LICENSE in this distribution.
  
  For more information about licensing, please refer to
  http://www.ghostscript.com/licensing/. For information on
  commercial licensing, go to http://www.artifex.com/licensing/ or
  contact Artifex Software, Inc., 101 Lucas Valley Road #110,
  San Rafael, CA  94903, U.S.A., +1(415)492-9861.
*/

/* $Id: zfbcp.c,v 1.5 2002/02/21 22:24:54 giles Exp $ */
/* (T)BCP filter creation */
#include "memory_.h"
#include "ghost.h"
#include "oper.h"
#include "gsstruct.h"
#include "ialloc.h"
#include "stream.h"
#include "strimpl.h"
#include "sbcp.h"
#include "ifilter.h"

/* Define null handlers for the BCP out-of-band signals. */
private int
no_bcp_signal_interrupt(stream_state * st)
{
    return 0;
}
private int
no_bcp_request_status(stream_state * st)
{
    return 0;
}

/* <source> BCPEncode/filter <file> */
/* <source> <dict> BCPEncode/filter <file> */
private int
zBCPE(i_ctx_t *i_ctx_p)
{
    return filter_write_simple(i_ctx_p, &s_BCPE_template);
}

/* <target> BCPDecode/filter <file> */
/* <target> <dict> BCPDecode/filter <file> */
private int
zBCPD(i_ctx_t *i_ctx_p)
{
    stream_BCPD_state state;

    state.signal_interrupt = no_bcp_signal_interrupt;
    state.request_status = no_bcp_request_status;
    return filter_read(i_ctx_p, 0, &s_BCPD_template, (stream_state *)&state, 0);
}

/* <source> TBCPEncode/filter <file> */
/* <source> <dict> TBCPEncode/filter <file> */
private int
zTBCPE(i_ctx_t *i_ctx_p)
{
    return filter_write_simple(i_ctx_p, &s_TBCPE_template);
}

/* <target> TBCPDecode/filter <file> */
/* <target> <dict> TBCPDecode/filter <file> */
private int
zTBCPD(i_ctx_t *i_ctx_p)
{
    stream_BCPD_state state;

    state.signal_interrupt = no_bcp_signal_interrupt;
    state.request_status = no_bcp_request_status;
    return filter_read(i_ctx_p, 0, &s_TBCPD_template, (stream_state *)&state, 0);
}

/* ------ Initialization procedure ------ */

const op_def zfbcp_op_defs[] =
{
    op_def_begin_filter(),
    {"1BCPEncode", zBCPE},
    {"1BCPDecode", zBCPD},
    {"1TBCPEncode", zTBCPE},
    {"1TBCPDecode", zTBCPD},
    op_def_end(0)
};