[gdcm.git] / src / gdcmjasper / src / libjasper / jpc / jpc_cs.c

/*
 * Copyright (c) 1999-2000 Image Power, Inc. and the University of
 *   British Columbia.
 * Copyright (c) 2001-2002 Michael David Adams.
 * All rights reserved.
 */

/* __START_OF_JASPER_LICENSE__
 * 
 * JasPer License Version 2.0
 * 
 * Copyright (c) 1999-2000 Image Power, Inc.
 * Copyright (c) 1999-2000 The University of British Columbia
 * Copyright (c) 2001-2003 Michael David Adams
 * 
 * All rights reserved.
 * 
 * Permission is hereby granted, free of charge, to any person (the
 * "User") obtaining a copy of this software and associated documentation
 * files (the "Software"), to deal in the Software without restriction,
 * including without limitation the rights to use, copy, modify, merge,
 * publish, distribute, and/or sell copies of the Software, and to permit
 * persons to whom the Software is furnished to do so, subject to the
 * following conditions:
 * 
 * 1.  The above copyright notices and this permission notice (which
 * includes the disclaimer below) shall be included in all copies or
 * substantial portions of the Software.
 * 
 * 2.  The name of a copyright holder shall not be used to endorse or
 * promote products derived from the Software without specific prior
 * written permission.
 * 
 * THIS DISCLAIMER OF WARRANTY CONSTITUTES AN ESSENTIAL PART OF THIS
 * LICENSE.  NO USE OF THE SOFTWARE IS AUTHORIZED HEREUNDER EXCEPT UNDER
 * THIS DISCLAIMER.  THE SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS
 * "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
 * PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.  IN NO
 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL
 * INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING
 * FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
 * NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
 * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.  NO ASSURANCES ARE
 * PROVIDED BY THE COPYRIGHT HOLDERS THAT THE SOFTWARE DOES NOT INFRINGE
 * THE PATENT OR OTHER INTELLECTUAL PROPERTY RIGHTS OF ANY OTHER ENTITY.
 * EACH COPYRIGHT HOLDER DISCLAIMS ANY LIABILITY TO THE USER FOR CLAIMS
 * BROUGHT BY ANY OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL
 * PROPERTY RIGHTS OR OTHERWISE.  AS A CONDITION TO EXERCISING THE RIGHTS
 * GRANTED HEREUNDER, EACH USER HEREBY ASSUMES SOLE RESPONSIBILITY TO SECURE
 * ANY OTHER INTELLECTUAL PROPERTY RIGHTS NEEDED, IF ANY.  THE SOFTWARE
 * IS NOT FAULT-TOLERANT AND IS NOT INTENDED FOR USE IN MISSION-CRITICAL
 * SYSTEMS, SUCH AS THOSE USED IN THE OPERATION OF NUCLEAR FACILITIES,
 * AIRCRAFT NAVIGATION OR COMMUNICATION SYSTEMS, AIR TRAFFIC CONTROL
 * SYSTEMS, DIRECT LIFE SUPPORT MACHINES, OR WEAPONS SYSTEMS, IN WHICH
 * THE FAILURE OF THE SOFTWARE OR SYSTEM COULD LEAD DIRECTLY TO DEATH,
 * PERSONAL INJURY, OR SEVERE PHYSICAL OR ENVIRONMENTAL DAMAGE ("HIGH
 * RISK ACTIVITIES").  THE COPYRIGHT HOLDERS SPECIFICALLY DISCLAIM ANY
 * EXPRESS OR IMPLIED WARRANTY OF FITNESS FOR HIGH RISK ACTIVITIES.
 * 
 * __END_OF_JASPER_LICENSE__
 */

/*
 * JPEG-2000 Code Stream Library
 *
 * $Id: jpc_cs.c,v 1.2 2005/06/11 02:05:14 malaterre Exp $
 */

/******************************************************************************\
* Includes.
\******************************************************************************/

#include <stdlib.h>
#include <assert.h>
#include <ctype.h>

#include "jasper/jas_malloc.h"
#include "jasper/jas_debug.h"

#include "jpc_cs.h"

/******************************************************************************\
* Types.
\******************************************************************************/

/* Marker segment table entry. */
typedef struct {
  int id;
  char *name;
  jpc_msops_t ops;
} jpc_mstabent_t;

/******************************************************************************\
* Local prototypes.
\******************************************************************************/

static jpc_mstabent_t *jpc_mstab_lookup(int id);

static int jpc_poc_dumpparms(jpc_ms_t *ms, FILE *out);
static int jpc_poc_putparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *out);
static int jpc_poc_getparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *in);
static void jpc_poc_destroyparms(jpc_ms_t *ms);

static int jpc_unk_getparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *in);
static int jpc_sot_getparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *in);
static int jpc_siz_getparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *in);
static int jpc_cod_getparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *in);
static int jpc_coc_getparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *in);
static int jpc_qcd_getparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *in);
static int jpc_qcc_getparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *in);
static int jpc_rgn_getparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *in);
static int jpc_sop_getparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *in);
static int jpc_ppm_getparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *in);
static int jpc_ppt_getparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *in);
static int jpc_crg_getparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *in);
static int jpc_com_getparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *in);

static int jpc_sot_putparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *out);
static int jpc_siz_putparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *out);
static int jpc_cod_putparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *out);
static int jpc_coc_putparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *out);
static int jpc_qcd_putparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *out);
static int jpc_qcc_putparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *out);
static int jpc_rgn_putparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *out);
static int jpc_unk_putparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *out);
static int jpc_sop_putparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *out);
static int jpc_ppm_putparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *out);
static int jpc_ppt_putparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *out);
static int jpc_crg_putparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *out);
static int jpc_com_putparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *out);

static int jpc_sot_dumpparms(jpc_ms_t *ms, FILE *out);
static int jpc_siz_dumpparms(jpc_ms_t *ms, FILE *out);
static int jpc_cod_dumpparms(jpc_ms_t *ms, FILE *out);
static int jpc_coc_dumpparms(jpc_ms_t *ms, FILE *out);
static int jpc_qcd_dumpparms(jpc_ms_t *ms, FILE *out);
static int jpc_qcc_dumpparms(jpc_ms_t *ms, FILE *out);
static int jpc_rgn_dumpparms(jpc_ms_t *ms, FILE *out);
static int jpc_unk_dumpparms(jpc_ms_t *ms, FILE *out);
static int jpc_sop_dumpparms(jpc_ms_t *ms, FILE *out);
static int jpc_ppm_dumpparms(jpc_ms_t *ms, FILE *out);
static int jpc_ppt_dumpparms(jpc_ms_t *ms, FILE *out);
static int jpc_crg_dumpparms(jpc_ms_t *ms, FILE *out);
static int jpc_com_dumpparms(jpc_ms_t *ms, FILE *out);

static void jpc_siz_destroyparms(jpc_ms_t *ms);
static void jpc_qcd_destroyparms(jpc_ms_t *ms);
static void jpc_qcc_destroyparms(jpc_ms_t *ms);
static void jpc_cod_destroyparms(jpc_ms_t *ms);
static void jpc_coc_destroyparms(jpc_ms_t *ms);
static void jpc_unk_destroyparms(jpc_ms_t *ms);
static void jpc_ppm_destroyparms(jpc_ms_t *ms);
static void jpc_ppt_destroyparms(jpc_ms_t *ms);
static void jpc_crg_destroyparms(jpc_ms_t *ms);
static void jpc_com_destroyparms(jpc_ms_t *ms);

static void jpc_qcx_destroycompparms(jpc_qcxcp_t *compparms);
static int jpc_qcx_getcompparms(jpc_qcxcp_t *compparms, jpc_cstate_t *cstate,
  jas_stream_t *in, uint_fast16_t len);
static int jpc_qcx_putcompparms(jpc_qcxcp_t *compparms, jpc_cstate_t *cstate,
  jas_stream_t *out);
static void jpc_cox_destroycompparms(jpc_coxcp_t *compparms);
static int jpc_cox_getcompparms(jpc_ms_t *ms, jpc_cstate_t *cstate,
  jas_stream_t *in, int prtflag, jpc_coxcp_t *compparms);
static int jpc_cox_putcompparms(jpc_ms_t *ms, jpc_cstate_t *cstate,
  jas_stream_t *out, int prtflag, jpc_coxcp_t *compparms);

/******************************************************************************\
* Global data.
\******************************************************************************/

static jpc_mstabent_t jpc_mstab[] = {
  {JPC_MS_SOC, "SOC", {0, 0, 0, 0}},
  {JPC_MS_SOT, "SOT", {0, jpc_sot_getparms, jpc_sot_putparms,
    jpc_sot_dumpparms}},
  {JPC_MS_SOD, "SOD", {0, 0, 0, 0}},
  {JPC_MS_EOC, "EOC", {0, 0, 0, 0}},
  {JPC_MS_SIZ, "SIZ", {jpc_siz_destroyparms, jpc_siz_getparms,
    jpc_siz_putparms, jpc_siz_dumpparms}},
  {JPC_MS_COD, "COD", {jpc_cod_destroyparms, jpc_cod_getparms,
    jpc_cod_putparms, jpc_cod_dumpparms}},
  {JPC_MS_COC, "COC", {jpc_coc_destroyparms, jpc_coc_getparms,
    jpc_coc_putparms, jpc_coc_dumpparms}},
  {JPC_MS_RGN, "RGN", {0, jpc_rgn_getparms, jpc_rgn_putparms,
    jpc_rgn_dumpparms}},
  {JPC_MS_QCD, "QCD", {jpc_qcd_destroyparms, jpc_qcd_getparms,
    jpc_qcd_putparms, jpc_qcd_dumpparms}},
  {JPC_MS_QCC, "QCC", {jpc_qcc_destroyparms, jpc_qcc_getparms,
    jpc_qcc_putparms, jpc_qcc_dumpparms}},
  {JPC_MS_POC, "POC", {jpc_poc_destroyparms, jpc_poc_getparms,
    jpc_poc_putparms, jpc_poc_dumpparms}},
  {JPC_MS_TLM, "TLM", {0, jpc_unk_getparms, jpc_unk_putparms, 0}},
  {JPC_MS_PLM, "PLM", {0, jpc_unk_getparms, jpc_unk_putparms, 0}},
  {JPC_MS_PPM, "PPM", {jpc_ppm_destroyparms, jpc_ppm_getparms,
    jpc_ppm_putparms, jpc_ppm_dumpparms}},
  {JPC_MS_PPT, "PPT", {jpc_ppt_destroyparms, jpc_ppt_getparms,
    jpc_ppt_putparms, jpc_ppt_dumpparms}},
  {JPC_MS_SOP, "SOP", {0, jpc_sop_getparms, jpc_sop_putparms,
    jpc_sop_dumpparms}},
  {JPC_MS_EPH, "EPH", {0, 0, 0, 0}},
  {JPC_MS_CRG, "CRG", {0, jpc_crg_getparms, jpc_crg_putparms,
    jpc_crg_dumpparms}},
  {JPC_MS_COM, "COM", {jpc_com_destroyparms, jpc_com_getparms,
    jpc_com_putparms, jpc_com_dumpparms}},
  {-1, "UNKNOWN",  {jpc_unk_destroyparms, jpc_unk_getparms,
    jpc_unk_putparms, jpc_unk_dumpparms}}
};

/******************************************************************************\
* Code stream manipulation functions.
\******************************************************************************/

/* Create a code stream state object. */
jpc_cstate_t *jpc_cstate_create()
{
  jpc_cstate_t *cstate;
  if (!(cstate = jas_malloc(sizeof(jpc_cstate_t)))) {
    return 0;
  }
  cstate->numcomps = 0;
  return cstate;
}

/* Destroy a code stream state object. */
void jpc_cstate_destroy(jpc_cstate_t *cstate)
{
  jas_free(cstate);
}

/* Read a marker segment from a stream. */
jpc_ms_t *jpc_getms(jas_stream_t *in, jpc_cstate_t *cstate)
{
  jpc_ms_t *ms;
  jpc_mstabent_t *mstabent;
  jas_stream_t *tmpstream;

  if (!(ms = jpc_ms_create(0))) {
    return 0;
  }

  /* Get the marker type. */
  if (jpc_getuint16(in, &ms->id) || ms->id < JPC_MS_MIN ||
    ms->id > JPC_MS_MAX) {
    jpc_ms_destroy(ms);
    return 0;
  }

  mstabent = jpc_mstab_lookup(ms->id);
  ms->ops = &mstabent->ops;

  /* Get the marker segment length and parameters if present. */
  /* Note: It is tacitly assumed that a marker segment cannot have
    parameters unless it has a length field.  That is, there cannot
    be a parameters field without a length field and vice versa. */
  if (JPC_MS_HASPARMS(ms->id)) {
    /* Get the length of the marker segment. */
    if (jpc_getuint16(in, &ms->len) || ms->len < 3) {
      jpc_ms_destroy(ms);
      return 0;
    }
    /* Calculate the length of the marker segment parameters. */
    ms->len -= 2;
    /* Create and prepare a temporary memory stream from which to
      read the marker segment parameters. */
    /* Note: This approach provides a simple way of ensuring that
      we never read beyond the end of the marker segment (even if
      the marker segment length is errantly set too small). */
    if (!(tmpstream = jas_stream_memopen(0, 0))) {
      jpc_ms_destroy(ms);
      return 0;
    }
    if (jas_stream_copy(tmpstream, in, ms->len) ||
      jas_stream_seek(tmpstream, 0, SEEK_SET) < 0) {
      jas_stream_close(tmpstream);
      jpc_ms_destroy(ms);
      return 0;
    }
    /* Get the marker segment parameters. */
    if ((*ms->ops->getparms)(ms, cstate, tmpstream)) {
      ms->ops = 0;
      jpc_ms_destroy(ms);
      jas_stream_close(tmpstream);
      return 0;
    }

    if (jas_getdbglevel() > 0) {
      jpc_ms_dump(ms, stderr);
    }

    if (JAS_CAST(ulong, jas_stream_tell(tmpstream)) != ms->len) {
      fprintf(stderr,
        "warning: trailing garbage in marker segment (%ld bytes)\n",
        ms->len - jas_stream_tell(tmpstream));
    }

    /* Close the temporary stream. */
    jas_stream_close(tmpstream);

  } else {
    /* There are no marker segment parameters. */
    ms->len = 0;

    if (jas_getdbglevel() > 0) {
      jpc_ms_dump(ms, stderr);
    }
  }

  /* Update the code stream state information based on the type of
    marker segment read. */
  /* Note: This is a bit of a hack, but I'm not going to define another
    type of virtual function for this one special case. */
  if (ms->id == JPC_MS_SIZ) {
    cstate->numcomps = ms->parms.siz.numcomps;
  }

  return ms;
}

/* Write a marker segment to a stream. */
int jpc_putms(jas_stream_t *out, jpc_cstate_t *cstate, jpc_ms_t *ms)
{
  jas_stream_t *tmpstream;
  int len;

  /* Output the marker segment type. */
  if (jpc_putuint16(out, ms->id)) {
    return -1;
  }

  /* Output the marker segment length and parameters if necessary. */
  if (ms->ops->putparms) {
    /* Create a temporary stream in which to buffer the
      parameter data. */
    if (!(tmpstream = jas_stream_memopen(0, 0))) {
      return -1;
    }
    if ((*ms->ops->putparms)(ms, cstate, tmpstream)) {
      jas_stream_close(tmpstream);
      return -1;
    }
    /* Get the number of bytes of parameter data written. */
    if ((len = jas_stream_tell(tmpstream)) < 0) {
      jas_stream_close(tmpstream);
      return -1;
    }
    ms->len = len;
    /* Write the marker segment length and parameter data to
      the output stream. */
    if (jas_stream_seek(tmpstream, 0, SEEK_SET) < 0 ||
      jpc_putuint16(out, ms->len + 2) ||
      jas_stream_copy(out, tmpstream, ms->len) < 0) {
      jas_stream_close(tmpstream);
      return -1;
    }
    /* Close the temporary stream. */
    jas_stream_close(tmpstream);
  }

  /* This is a bit of a hack, but I'm not going to define another
    type of virtual function for this one special case. */
  if (ms->id == JPC_MS_SIZ) {
    cstate->numcomps = ms->parms.siz.numcomps;
  }

  if (jas_getdbglevel() > 0) {
    jpc_ms_dump(ms, stderr);
  }

  return 0;
}

/******************************************************************************\
* Marker segment operations.
\******************************************************************************/

/* Create a marker segment of the specified type. */
jpc_ms_t *jpc_ms_create(int type)
{
  jpc_ms_t *ms;
  jpc_mstabent_t *mstabent;

  if (!(ms = jas_malloc(sizeof(jpc_ms_t)))) {
    return 0;
  }
  ms->id = type;
  ms->len = 0;
  mstabent = jpc_mstab_lookup(ms->id);
  ms->ops = &mstabent->ops;
  memset(&ms->parms, 0, sizeof(jpc_msparms_t));
  return ms;
}

/* Destroy a marker segment. */
void jpc_ms_destroy(jpc_ms_t *ms)
{
  if (ms->ops && ms->ops->destroyparms) {
    (*ms->ops->destroyparms)(ms);
  }
  jas_free(ms);
}

/* Dump a marker segment to a stream for debugging. */
void jpc_ms_dump(jpc_ms_t *ms, FILE *out)
{
  jpc_mstabent_t *mstabent;
  mstabent = jpc_mstab_lookup(ms->id);
  fprintf(out, "type = 0x%04x (%s);", ms->id, mstabent->name);
  if (JPC_MS_HASPARMS(ms->id)) {
    fprintf(out, " len = %d;", ms->len + 2);
    if (ms->ops->dumpparms) {
      (*ms->ops->dumpparms)(ms, out);
    } else {
      fprintf(out, "\n");
    }
  } else {
    fprintf(out, "\n");
  }
}

/******************************************************************************\
* SOT marker segment operations.
\******************************************************************************/

static int jpc_sot_getparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *in)
{
  jpc_sot_t *sot = &ms->parms.sot;

  /* Eliminate compiler warning about unused variables. */
  cstate = 0;

  if (jpc_getuint16(in, &sot->tileno) ||
    jpc_getuint32(in, &sot->len) ||
    jpc_getuint8(in, &sot->partno) ||
    jpc_getuint8(in, &sot->numparts)) {
    return -1;
  }
  if (jas_stream_eof(in)) {
    return -1;
  }
  return 0;
}

static int jpc_sot_putparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *out)
{
  jpc_sot_t *sot = &ms->parms.sot;

  /* Eliminate compiler warning about unused variables. */
  cstate = 0;

  if (jpc_putuint16(out, sot->tileno) ||
    jpc_putuint32(out, sot->len) ||
    jpc_putuint8(out, sot->partno) ||
    jpc_putuint8(out, sot->numparts)) {
    return -1;
  }
  return 0;
}

static int jpc_sot_dumpparms(jpc_ms_t *ms, FILE *out)
{
  jpc_sot_t *sot = &ms->parms.sot;
  fprintf(out, "tileno = %d; len = %d; partno = %d; numparts = %d\n",
    sot->tileno, sot->len, sot->partno, sot->numparts);
  return 0;
}

/******************************************************************************\
* SIZ marker segment operations.
\******************************************************************************/

static void jpc_siz_destroyparms(jpc_ms_t *ms)
{
  jpc_siz_t *siz = &ms->parms.siz;
  if (siz->comps) {
    jas_free(siz->comps);
  }
}

static int jpc_siz_getparms(jpc_ms_t *ms, jpc_cstate_t *cstate,
  jas_stream_t *in)
{
  jpc_siz_t *siz = &ms->parms.siz;
  unsigned int i;
  uint_fast8_t tmp;

  /* Eliminate compiler warning about unused variables. */
  cstate = 0;

  if (jpc_getuint16(in, &siz->caps) ||
    jpc_getuint32(in, &siz->width) ||
    jpc_getuint32(in, &siz->height) ||
    jpc_getuint32(in, &siz->xoff) ||
    jpc_getuint32(in, &siz->yoff) ||
    jpc_getuint32(in, &siz->tilewidth) ||
    jpc_getuint32(in, &siz->tileheight) ||
    jpc_getuint32(in, &siz->tilexoff) ||
    jpc_getuint32(in, &siz->tileyoff) ||
    jpc_getuint16(in, &siz->numcomps)) {
    return -1;
  }
  if (!siz->width || !siz->height || !siz->tilewidth ||
    !siz->tileheight || !siz->numcomps) {
    return -1;
  }
  if (!(siz->comps = jas_malloc(siz->numcomps * sizeof(jpc_sizcomp_t)))) {
    return -1;
  }
  for (i = 0; i < siz->numcomps; ++i) {
    if (jpc_getuint8(in, &tmp) ||
      jpc_getuint8(in, &siz->comps[i].hsamp) ||
      jpc_getuint8(in, &siz->comps[i].vsamp)) {
      jas_free(siz->comps);
      return -1;
    }
    siz->comps[i].sgnd = (tmp >> 7) & 1;
    siz->comps[i].prec = (tmp & 0x7f) + 1;
  }
  if (jas_stream_eof(in)) {
    jas_free(siz->comps);
    return -1;
  }
  return 0;
}

static int jpc_siz_putparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *out)
{
  jpc_siz_t *siz = &ms->parms.siz;
  unsigned int i;

  /* Eliminate compiler warning about unused variables. */
  cstate = 0;

  assert(siz->width && siz->height && siz->tilewidth &&
    siz->tileheight && siz->numcomps);
  if (jpc_putuint16(out, siz->caps) ||
    jpc_putuint32(out, siz->width) ||
    jpc_putuint32(out, siz->height) ||
    jpc_putuint32(out, siz->xoff) ||
    jpc_putuint32(out, siz->yoff) ||
    jpc_putuint32(out, siz->tilewidth) ||
    jpc_putuint32(out, siz->tileheight) ||
    jpc_putuint32(out, siz->tilexoff) ||
    jpc_putuint32(out, siz->tileyoff) ||
    jpc_putuint16(out, siz->numcomps)) {
    return -1;
  }
  for (i = 0; i < siz->numcomps; ++i) {
    if (jpc_putuint8(out, ((siz->comps[i].sgnd & 1) << 7) |
      ((siz->comps[i].prec - 1) & 0x7f)) ||
      jpc_putuint8(out, siz->comps[i].hsamp) ||
      jpc_putuint8(out, siz->comps[i].vsamp)) {
      return -1;
    }
  }
  return 0;
}

static int jpc_siz_dumpparms(jpc_ms_t *ms, FILE *out)
{
  jpc_siz_t *siz = &ms->parms.siz;
  unsigned int i;
  fprintf(out, "caps = 0x%02x;\n", siz->caps);
  fprintf(out, "width = %d; height = %d; xoff = %d; yoff = %d;\n",
    siz->width, siz->height, siz->xoff, siz->yoff);
  fprintf(out, "tilewidth = %d; tileheight = %d; tilexoff = %d; "
    "tileyoff = %d;\n", siz->tilewidth, siz->tileheight, siz->tilexoff,
    siz->tileyoff);
  for (i = 0; i < siz->numcomps; ++i) {
    fprintf(out, "prec[%d] = %d; sgnd[%d] = %d; hsamp[%d] = %d; "
      "vsamp[%d] = %d\n", i, siz->comps[i].prec, i,
      siz->comps[i].sgnd, i, siz->comps[i].hsamp, i,
      siz->comps[i].vsamp);
  }
  return 0;
}

/******************************************************************************\
* COD marker segment operations.
\******************************************************************************/

static void jpc_cod_destroyparms(jpc_ms_t *ms)
{
  jpc_cod_t *cod = &ms->parms.cod;
  jpc_cox_destroycompparms(&cod->compparms);
}

static int jpc_cod_getparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *in)
{
  jpc_cod_t *cod = &ms->parms.cod;
  if (jpc_getuint8(in, &cod->csty)) {
    return -1;
  }
  if (jpc_getuint8(in, &cod->prg) ||
    jpc_getuint16(in, &cod->numlyrs) ||
    jpc_getuint8(in, &cod->mctrans)) {
    return -1;
  }
  if (jpc_cox_getcompparms(ms, cstate, in,
    (cod->csty & JPC_COX_PRT) != 0, &cod->compparms)) {
    return -1;
  }
  if (jas_stream_eof(in)) {
    jpc_cod_destroyparms(ms);
    return -1;
  }
  return 0;
}

static int jpc_cod_putparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *out)
{
  jpc_cod_t *cod = &ms->parms.cod;
  assert(cod->numlyrs > 0 && cod->compparms.numdlvls <= 32);
  assert(cod->compparms.numdlvls == cod->compparms.numrlvls - 1);
  if (jpc_putuint8(out, cod->compparms.csty) ||
    jpc_putuint8(out, cod->prg) ||
    jpc_putuint16(out, cod->numlyrs) ||
    jpc_putuint8(out, cod->mctrans)) {
    return -1;
  }
  if (jpc_cox_putcompparms(ms, cstate, out,
    (cod->csty & JPC_COX_PRT) != 0, &cod->compparms)) {
    return -1;
  }
  return 0;
}

static int jpc_cod_dumpparms(jpc_ms_t *ms, FILE *out)
{
  jpc_cod_t *cod = &ms->parms.cod;
  int i;
  fprintf(out, "csty = 0x%02x;\n", cod->compparms.csty);
  fprintf(out, "numdlvls = %d; qmfbid = %d; mctrans = %d\n",
    cod->compparms.numdlvls, cod->compparms.qmfbid, cod->mctrans);
  fprintf(out, "prg = %d; numlyrs = %d;\n",
    cod->prg, cod->numlyrs);
  fprintf(out, "cblkwidthval = %d; cblkheightval = %d; "
    "cblksty = 0x%02x;\n", cod->compparms.cblkwidthval, cod->compparms.cblkheightval,
    cod->compparms.cblksty);
  if (cod->csty & JPC_COX_PRT) {
    for (i = 0; i < cod->compparms.numrlvls; ++i) {
      fprintf(stderr, "prcwidth[%d] = %d, prcheight[%d] = %d\n",
        i, cod->compparms.rlvls[i].parwidthval,
        i, cod->compparms.rlvls[i].parheightval);
    }
  }
  return 0;
}

/******************************************************************************\
* COC marker segment operations.
\******************************************************************************/

static void jpc_coc_destroyparms(jpc_ms_t *ms)
{
  jpc_coc_t *coc = &ms->parms.coc;
  jpc_cox_destroycompparms(&coc->compparms);
}

static int jpc_coc_getparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *in)
{
  jpc_coc_t *coc = &ms->parms.coc;
  uint_fast8_t tmp;
  if (cstate->numcomps <= 256) {
    if (jpc_getuint8(in, &tmp)) {
      return -1;
    }
    coc->compno = tmp;
  } else {
    if (jpc_getuint16(in, &coc->compno)) {
      return -1;
    }
  }
  if (jpc_getuint8(in, &coc->compparms.csty)) {
    return -1;
  }
  if (jpc_cox_getcompparms(ms, cstate, in,
    (coc->compparms.csty & JPC_COX_PRT) != 0, &coc->compparms)) {
    return -1;
  }
  if (jas_stream_eof(in)) {
    return -1;
  }
  return 0;
}

static int jpc_coc_putparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *out)
{
  jpc_coc_t *coc = &ms->parms.coc;
  assert(coc->compparms.numdlvls <= 32);
  if (cstate->numcomps <= 256) {
    if (jpc_putuint8(out, (uint_fast8_t)coc->compno)) {
      return -1;
    }
  } else {
    if (jpc_putuint16(out, coc->compno)) {
      return -1;
    }
  }
  if (jpc_putuint8(out, coc->compparms.csty)) {
    return -1;
  }
  if (jpc_cox_putcompparms(ms, cstate, out,
    (coc->compparms.csty & JPC_COX_PRT) != 0, &coc->compparms)) {
    return -1;
  }
  return 0;
}

static int jpc_coc_dumpparms(jpc_ms_t *ms, FILE *out)
{
  jpc_coc_t *coc = &ms->parms.coc;
  fprintf(out, "compno = %d; csty = 0x%02x; numdlvls = %d;\n",
    coc->compno, coc->compparms.csty, coc->compparms.numdlvls);
  fprintf(out, "cblkwidthval = %d; cblkheightval = %d; "
    "cblksty = 0x%02x; qmfbid = %d;\n", coc->compparms.cblkwidthval,
    coc->compparms.cblkheightval, coc->compparms.cblksty, coc->compparms.qmfbid);
  return 0;
}
/******************************************************************************\
* COD/COC marker segment operation helper functions.
\******************************************************************************/

static void jpc_cox_destroycompparms(jpc_coxcp_t *compparms)
{
  /* Eliminate compiler warning about unused variables. */
  compparms = 0;
}

static int jpc_cox_getcompparms(jpc_ms_t *ms, jpc_cstate_t *cstate,
  jas_stream_t *in, int prtflag, jpc_coxcp_t *compparms)
{
  uint_fast8_t tmp;
  int i;

  /* Eliminate compiler warning about unused variables. */
  ms = 0;
  cstate = 0;

  if (jpc_getuint8(in, &compparms->numdlvls) ||
    jpc_getuint8(in, &compparms->cblkwidthval) ||
    jpc_getuint8(in, &compparms->cblkheightval) ||
    jpc_getuint8(in, &compparms->cblksty) ||
    jpc_getuint8(in, &compparms->qmfbid)) {
    return -1;
  }
  compparms->numrlvls = compparms->numdlvls + 1;
  if (prtflag) {
    for (i = 0; i < compparms->numrlvls; ++i) {
      if (jpc_getuint8(in, &tmp)) {
        jpc_cox_destroycompparms(compparms);
        return -1;
      }
      compparms->rlvls[i].parwidthval = tmp & 0xf;
      compparms->rlvls[i].parheightval = (tmp >> 4) & 0xf;
    }
/* Sigh.  This bit should be in the same field in both COC and COD mrk segs. */
compparms->csty |= JPC_COX_PRT;
  } else {
  }
  if (jas_stream_eof(in)) {
    jpc_cox_destroycompparms(compparms);
    return -1;
  }
  return 0;
}

static int jpc_cox_putcompparms(jpc_ms_t *ms, jpc_cstate_t *cstate,
  jas_stream_t *out, int prtflag, jpc_coxcp_t *compparms)
{
  int i;
  assert(compparms->numdlvls <= 32);

  /* Eliminate compiler warning about unused variables. */
  ms = 0;
  cstate = 0;

  if (jpc_putuint8(out, compparms->numdlvls) ||
    jpc_putuint8(out, compparms->cblkwidthval) ||
    jpc_putuint8(out, compparms->cblkheightval) ||
    jpc_putuint8(out, compparms->cblksty) ||
    jpc_putuint8(out, compparms->qmfbid)) {
    return -1;
  }
  if (prtflag) {
    for (i = 0; i < compparms->numrlvls; ++i) {
      if (jpc_putuint8(out,
        ((compparms->rlvls[i].parheightval & 0xf) << 4) |
        (compparms->rlvls[i].parwidthval & 0xf))) {
        return -1;
      }
    }
  }
  return 0;
}

/******************************************************************************\
* RGN marker segment operations.
\******************************************************************************/

static int jpc_rgn_getparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *in)
{
  jpc_rgn_t *rgn = &ms->parms.rgn;
  uint_fast8_t tmp;
  if (cstate->numcomps <= 256) {
    if (jpc_getuint8(in, &tmp)) {
      return -1;
    }
    rgn->compno = tmp;
  } else {
    if (jpc_getuint16(in, &rgn->compno)) {
      return -1;
    }
  }
  if (jpc_getuint8(in, &rgn->roisty) ||
    jpc_getuint8(in, &rgn->roishift)) {
    return -1;
  }
  return 0;
}

static int jpc_rgn_putparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *out)
{
  jpc_rgn_t *rgn = &ms->parms.rgn;
  if (cstate->numcomps <= 256) {
    if (jpc_putuint8(out, (uint_fast8_t)rgn->compno)) {
      return -1;
    }
  } else {
    if (jpc_putuint16(out, rgn->compno)) {
      return -1;
    }
  }
  if (jpc_putuint8(out, rgn->roisty) ||
    jpc_putuint8(out, rgn->roishift)) {
    return -1;
  }
  return 0;
}

static int jpc_rgn_dumpparms(jpc_ms_t *ms, FILE *out)
{
  jpc_rgn_t *rgn = &ms->parms.rgn;
  fprintf(out, "compno = %d; roisty = %d; roishift = %d\n",
    rgn->compno, rgn->roisty, rgn->roishift);
  return 0;
}

/******************************************************************************\
* QCD marker segment operations.
\******************************************************************************/

static void jpc_qcd_destroyparms(jpc_ms_t *ms)
{
  jpc_qcd_t *qcd = &ms->parms.qcd;
  jpc_qcx_destroycompparms(&qcd->compparms);
}

static int jpc_qcd_getparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *in)
{
  jpc_qcxcp_t *compparms = &ms->parms.qcd.compparms;
  return jpc_qcx_getcompparms(compparms, cstate, in, ms->len);
}

static int jpc_qcd_putparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *out)
{
  jpc_qcxcp_t *compparms = &ms->parms.qcd.compparms;
  return jpc_qcx_putcompparms(compparms, cstate, out);
}

static int jpc_qcd_dumpparms(jpc_ms_t *ms, FILE *out)
{
  jpc_qcd_t *qcd = &ms->parms.qcd;
  int i;
  fprintf(out, "qntsty = %d; numguard = %d; numstepsizes = %d\n",
    (int) qcd->compparms.qntsty, qcd->compparms.numguard, qcd->compparms.numstepsizes);
  for (i = 0; i < qcd->compparms.numstepsizes; ++i) {
    fprintf(out, "expn[%d] = 0x%04x; mant[%d] = 0x%04x;\n",
      i, (unsigned) JPC_QCX_GETEXPN(qcd->compparms.stepsizes[i]),
      i, (unsigned) JPC_QCX_GETMANT(qcd->compparms.stepsizes[i]));
  }
  return 0;
}

/******************************************************************************\
* QCC marker segment operations.
\******************************************************************************/

static void jpc_qcc_destroyparms(jpc_ms_t *ms)
{
  jpc_qcc_t *qcc = &ms->parms.qcc;
  jpc_qcx_destroycompparms(&qcc->compparms);
}

static int jpc_qcc_getparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *in)
{
  jpc_qcc_t *qcc = &ms->parms.qcc;
  uint_fast8_t tmp;
  int len;
  len = ms->len;
  if (cstate->numcomps <= 256) {
    jpc_getuint8(in, &tmp);
    qcc->compno = tmp;
    --len;
  } else {
    jpc_getuint16(in, &qcc->compno);
    len -= 2;
  }
  if (jpc_qcx_getcompparms(&qcc->compparms, cstate, in, len)) {
    return -1;
  }
  if (jas_stream_eof(in)) {
    jpc_qcc_destroyparms(ms);
    return -1;
  }
  return 0;
}

static int jpc_qcc_putparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *out)
{
  jpc_qcc_t *qcc = &ms->parms.qcc;
  if (cstate->numcomps <= 256) {
    jpc_putuint8(out, (uint_fast8_t)qcc->compno);
  } else {
    jpc_putuint16(out, qcc->compno);
  }
  if (jpc_qcx_putcompparms(&qcc->compparms, cstate, out)) {
    return -1;
  }
  return 0;
}

static int jpc_qcc_dumpparms(jpc_ms_t *ms, FILE *out)
{
  jpc_qcc_t *qcc = &ms->parms.qcc;
  int i;
  fprintf(out, "compno = %d; qntsty = %d; numguard = %d; "
    "numstepsizes = %d\n", qcc->compno, qcc->compparms.qntsty, qcc->compparms.numguard,
    qcc->compparms.numstepsizes);
  for (i = 0; i < qcc->compparms.numstepsizes; ++i) {
    fprintf(out, "expn[%d] = 0x%04x; mant[%d] = 0x%04x;\n",
      i, (unsigned) JPC_QCX_GETEXPN(qcc->compparms.stepsizes[i]),
      i, (unsigned) JPC_QCX_GETMANT(qcc->compparms.stepsizes[i]));
  }
  return 0;
}

/******************************************************************************\
* QCD/QCC marker segment helper functions.
\******************************************************************************/

static void jpc_qcx_destroycompparms(jpc_qcxcp_t *compparms)
{
  if (compparms->stepsizes) {
    jas_free(compparms->stepsizes);
  }
}

static int jpc_qcx_getcompparms(jpc_qcxcp_t *compparms, jpc_cstate_t *cstate,
  jas_stream_t *in, uint_fast16_t len)
{
  uint_fast8_t tmp;
  int n;
  int i;

  /* Eliminate compiler warning about unused variables. */
  cstate = 0;

  n = 0;
  jpc_getuint8(in, &tmp);
  ++n;
  compparms->qntsty = tmp & 0x1f;
  compparms->numguard = (tmp >> 5) & 7;
  switch (compparms->qntsty) {
  case JPC_QCX_SIQNT:
    compparms->numstepsizes = 1;
    break;
  case JPC_QCX_NOQNT:
    compparms->numstepsizes = (len - n);
    break;
  case JPC_QCX_SEQNT:
    /* XXX - this is a hack */
    compparms->numstepsizes = (len - n) / 2;
    break;
  }
if (compparms->numstepsizes > 0) {
  compparms->stepsizes = jas_malloc(compparms->numstepsizes *
    sizeof(uint_fast32_t));
  assert(compparms->stepsizes);
  for (i = 0; i < compparms->numstepsizes; ++i) {
    if (compparms->qntsty == JPC_QCX_NOQNT) {
      jpc_getuint8(in, &tmp);
      compparms->stepsizes[i] = JPC_QCX_EXPN(tmp >> 3);
    } else {
      jpc_getuint16(in, &compparms->stepsizes[i]);
    }
  }
} else {
  compparms->stepsizes = 0;
}
  if (jas_stream_error(in) || jas_stream_eof(in)) {
    jpc_qcx_destroycompparms(compparms);
    return -1;
  }
  return 0;
}

static int jpc_qcx_putcompparms(jpc_qcxcp_t *compparms, jpc_cstate_t *cstate,
  jas_stream_t *out)
{
  int i;

  /* Eliminate compiler warning about unused variables. */
  cstate = 0;

  jpc_putuint8(out, ((compparms->numguard & 7) << 5) | compparms->qntsty);
  for (i = 0; i < compparms->numstepsizes; ++i) {
    if (compparms->qntsty == JPC_QCX_NOQNT) {
      jpc_putuint8(out, JPC_QCX_GETEXPN(
        compparms->stepsizes[i]) << 3);
    } else {
      jpc_putuint16(out, compparms->stepsizes[i]);
    }
  }
  return 0;
}

/******************************************************************************\
* SOP marker segment operations.
\******************************************************************************/

static int jpc_sop_getparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *in)
{
  jpc_sop_t *sop = &ms->parms.sop;

  /* Eliminate compiler warning about unused variable. */
  cstate = 0;

  if (jpc_getuint16(in, &sop->seqno)) {
    return -1;
  }
  return 0;
}

static int jpc_sop_putparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *out)
{
  jpc_sop_t *sop = &ms->parms.sop;

  /* Eliminate compiler warning about unused variable. */
  cstate = 0;

  if (jpc_putuint16(out, sop->seqno)) {
    return -1;
  }
  return 0;
}

static int jpc_sop_dumpparms(jpc_ms_t *ms, FILE *out)
{
  jpc_sop_t *sop = &ms->parms.sop;
  fprintf(out, "seqno = %d;\n", sop->seqno);
  return 0;
}

/******************************************************************************\
* PPM marker segment operations.
\******************************************************************************/

static void jpc_ppm_destroyparms(jpc_ms_t *ms)
{
  jpc_ppm_t *ppm = &ms->parms.ppm;
  if (ppm->data) {
    jas_free(ppm->data);
  }
}

static int jpc_ppm_getparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *in)
{
  jpc_ppm_t *ppm = &ms->parms.ppm;

  /* Eliminate compiler warning about unused variables. */
  cstate = 0;

  ppm->data = 0;

  if (ms->len < 1) {
    goto error;
  }
  if (jpc_getuint8(in, &ppm->ind)) {
    goto error;
  }

  ppm->len = ms->len - 1;
  if (ppm->len > 0) {
    if (!(ppm->data = jas_malloc(ppm->len * sizeof(unsigned char)))) {
      goto error;
    }
    if (JAS_CAST(uint, jas_stream_read(in, ppm->data, ppm->len)) != ppm->len) {
      goto error;
    }
  } else {
    ppm->data = 0;
  }
  return 0;

error:
  jpc_ppm_destroyparms(ms);
  return -1;
}

static int jpc_ppm_putparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *out)
{
  jpc_ppm_t *ppm = &ms->parms.ppm;

  /* Eliminate compiler warning about unused variables. */
  cstate = 0;

  if (JAS_CAST(uint, jas_stream_write(out, (char *) ppm->data, ppm->len)) != ppm->len) {
    return -1;
  }
  return 0;
}

static int jpc_ppm_dumpparms(jpc_ms_t *ms, FILE *out)
{
  jpc_ppm_t *ppm = &ms->parms.ppm;
  fprintf(out, "ind=%d; len = %d;\n", ppm->ind, ppm->len);
  if (ppm->len > 0) {
    fprintf(out, "data =\n");
    jas_memdump(out, ppm->data, ppm->len);
  }
  return 0;
}

/******************************************************************************\
* PPT marker segment operations.
\******************************************************************************/

static void jpc_ppt_destroyparms(jpc_ms_t *ms)
{
  jpc_ppt_t *ppt = &ms->parms.ppt;
  if (ppt->data) {
    jas_free(ppt->data);
  }
}

static int jpc_ppt_getparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *in)
{
  jpc_ppt_t *ppt = &ms->parms.ppt;

  /* Eliminate compiler warning about unused variables. */
  cstate = 0;

  ppt->data = 0;

  if (ms->len < 1) {
    goto error;
  }
  if (jpc_getuint8(in, &ppt->ind)) {
    goto error;
  }
  ppt->len = ms->len - 1;
  if (ppt->len > 0) {
    if (!(ppt->data = jas_malloc(ppt->len * sizeof(unsigned char)))) {
      goto error;
    }
    if (jas_stream_read(in, (char *) ppt->data, ppt->len) != JAS_CAST(int, ppt->len)) {
      goto error;
    }
  } else {
    ppt->data = 0;
  }
  return 0;

error:
  jpc_ppt_destroyparms(ms);
  return -1;
}

static int jpc_ppt_putparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *out)
{
  jpc_ppt_t *ppt = &ms->parms.ppt;

  /* Eliminate compiler warning about unused variable. */
  cstate = 0;

  if (jpc_putuint8(out, ppt->ind)) {
    return -1;
  }
  if (jas_stream_write(out, (char *) ppt->data, ppt->len) != JAS_CAST(int, ppt->len)) {
    return -1;
  }
  return 0;
}

static int jpc_ppt_dumpparms(jpc_ms_t *ms, FILE *out)
{
  jpc_ppt_t *ppt = &ms->parms.ppt;
  fprintf(out, "ind=%d; len = %d;\n", ppt->ind, ppt->len);
  if (ppt->len > 0) {
    fprintf(out, "data =\n");
    jas_memdump(out, ppt->data, ppt->len);
  }
  return 0;
}

/******************************************************************************\
* POC marker segment operations.
\******************************************************************************/

static void jpc_poc_destroyparms(jpc_ms_t *ms)
{
  jpc_poc_t *poc = &ms->parms.poc;
  if (poc->pchgs) {
    jas_free(poc->pchgs);
  }
}

static int jpc_poc_getparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *in)
{
  jpc_poc_t *poc = &ms->parms.poc;
  jpc_pocpchg_t *pchg;
  int pchgno;
  uint_fast8_t tmp;
  poc->numpchgs = (cstate->numcomps > 256) ? (ms->len / 9) :
    (ms->len / 7);
  if (!(poc->pchgs = jas_malloc(poc->numpchgs * sizeof(jpc_pocpchg_t)))) {
    goto error;
  }
  for (pchgno = 0, pchg = poc->pchgs; pchgno < poc->numpchgs; ++pchgno,
    ++pchg) {
    if (jpc_getuint8(in, &pchg->rlvlnostart)) {
      goto error;
    }
    if (cstate->numcomps > 256) {
      if (jpc_getuint16(in, &pchg->compnostart)) {
        goto error;
      }
    } else {
      if (jpc_getuint8(in, &tmp)) {
        goto error;
      };
      pchg->compnostart = tmp;
    }
    if (jpc_getuint16(in, &pchg->lyrnoend) ||
      jpc_getuint8(in, &pchg->rlvlnoend)) {
      goto error;
    }
    if (cstate->numcomps > 256) {
      if (jpc_getuint16(in, &pchg->compnoend)) {
        goto error;
      }
    } else {
      if (jpc_getuint8(in, &tmp)) {
        goto error;
      }
      pchg->compnoend = tmp;
    }
    if (jpc_getuint8(in, &pchg->prgord)) {
      goto error;
    }
    if (pchg->rlvlnostart > pchg->rlvlnoend ||
      pchg->compnostart > pchg->compnoend) {
      goto error;
    }
  }
  return 0;

error:
  jpc_poc_destroyparms(ms);
  return -1;
}

static int jpc_poc_putparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *out)
{
  jpc_poc_t *poc = &ms->parms.poc;
  jpc_pocpchg_t *pchg;
  int pchgno;
  for (pchgno = 0, pchg = poc->pchgs; pchgno < poc->numpchgs; ++pchgno,
    ++pchg) {
    if (jpc_putuint8(out, pchg->rlvlnostart) ||
      ((cstate->numcomps > 256) ?
      jpc_putuint16(out, pchg->compnostart) :
      jpc_putuint8(out, (uint_fast8_t)pchg->compnostart)) ||
      jpc_putuint16(out, pchg->lyrnoend) ||
      jpc_putuint8(out, pchg->rlvlnoend) ||
      ((cstate->numcomps > 256) ?
      jpc_putuint16(out, pchg->compnoend) :
      jpc_putuint8(out, (uint_fast8_t)pchg->compnoend)) ||
      jpc_putuint8(out, pchg->prgord)) {
      return -1;
    }
  }
  return 0;
}

static int jpc_poc_dumpparms(jpc_ms_t *ms, FILE *out)
{
  jpc_poc_t *poc = &ms->parms.poc;
  jpc_pocpchg_t *pchg;
  int pchgno;
  for (pchgno = 0, pchg = poc->pchgs; pchgno < poc->numpchgs;
    ++pchgno, ++pchg) {
    fprintf(out, "po[%d] = %d; ", pchgno, pchg->prgord);
    fprintf(out, "cs[%d] = %d; ce[%d] = %d; ",
      pchgno, pchg->compnostart, pchgno, pchg->compnoend);
    fprintf(out, "rs[%d] = %d; re[%d] = %d; ",
      pchgno, pchg->rlvlnostart, pchgno, pchg->rlvlnoend);
    fprintf(out, "le[%d] = %d\n", pchgno, pchg->lyrnoend);
  }
  return 0;
}

/******************************************************************************\
* CRG marker segment operations.
\******************************************************************************/

static void jpc_crg_destroyparms(jpc_ms_t *ms)
{
  jpc_crg_t *crg = &ms->parms.crg;
  if (crg->comps) {
    jas_free(crg->comps);
  }
}

static int jpc_crg_getparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *in)
{
  jpc_crg_t *crg = &ms->parms.crg;
  jpc_crgcomp_t *comp;
  uint_fast16_t compno;
  crg->numcomps = cstate->numcomps;
  if (!(crg->comps = jas_malloc(cstate->numcomps * sizeof(uint_fast16_t)))) {
    return -1;
  }
  for (compno = 0, comp = crg->comps; compno < cstate->numcomps;
    ++compno, ++comp) {
    if (jpc_getuint16(in, &comp->hoff) ||
      jpc_getuint16(in, &comp->voff)) {
      jpc_crg_destroyparms(ms);
      return -1;
    }
  }
  return 0;
}

static int jpc_crg_putparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *out)
{
  jpc_crg_t *crg = &ms->parms.crg;
  int compno;
  jpc_crgcomp_t *comp;

  /* Eliminate compiler warning about unused variables. */
  cstate = 0;

  for (compno = 0, comp = crg->comps; compno < crg->numcomps; ++compno,
    ++comp) {
    if (jpc_putuint16(out, comp->hoff) ||
      jpc_putuint16(out, comp->voff)) {
      return -1;
    }
  }
  return 0;
}

static int jpc_crg_dumpparms(jpc_ms_t *ms, FILE *out)
{
  jpc_crg_t *crg = &ms->parms.crg;
  int compno;
  jpc_crgcomp_t *comp;
  for (compno = 0, comp = crg->comps; compno < crg->numcomps; ++compno,
    ++comp) {
    fprintf(out, "hoff[%d] = %d; voff[%d] = %d\n", compno,
      comp->hoff, compno, comp->voff);
  }
  return 0;
}

/******************************************************************************\
* Operations for COM marker segment.
\******************************************************************************/

static void jpc_com_destroyparms(jpc_ms_t *ms)
{
  jpc_com_t *com = &ms->parms.com;
  if (com->data) {
    jas_free(com->data);
  }
}

static int jpc_com_getparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *in)
{
  jpc_com_t *com = &ms->parms.com;

  /* Eliminate compiler warning about unused variables. */
  cstate = 0;

  if (jpc_getuint16(in, &com->regid)) {
    return -1;
  }
  com->len = ms->len - 2;
  if (com->len > 0) {
    if (!(com->data = jas_malloc(com->len))) {
      return -1;
    }
    if (jas_stream_read(in, com->data, com->len) != JAS_CAST(int, com->len)) {
      return -1;
    }
  } else {
    com->data = 0;
  }
  return 0;
}

static int jpc_com_putparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *out)
{
  jpc_com_t *com = &ms->parms.com;

  /* Eliminate compiler warning about unused variables. */
  cstate = 0;

  if (jpc_putuint16(out, com->regid)) {
    return -1;
  }
  if (jas_stream_write(out, com->data, com->len) != JAS_CAST(int, com->len)) {
    return -1;
  }
  return 0;
}

static int jpc_com_dumpparms(jpc_ms_t *ms, FILE *out)
{
  jpc_com_t *com = &ms->parms.com;
  unsigned int i;
  int printable;
  fprintf(out, "regid = %d;\n", com->regid);
  printable = 1;
  for (i = 0; i < com->len; ++i) {
    if (!isprint(com->data[i])) {
      printable = 0;
      break;
    }
  }
  if (printable) {
    fprintf(out, "data = ");
    fwrite(com->data, sizeof(char), com->len, out);
    fprintf(out, "\n");
  }
  return 0;
}

/******************************************************************************\
* Operations for unknown types of marker segments.
\******************************************************************************/

static void jpc_unk_destroyparms(jpc_ms_t *ms)
{
  jpc_unk_t *unk = &ms->parms.unk;
  if (unk->data) {
    jas_free(unk->data);
  }
}

static int jpc_unk_getparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *in)
{
  jpc_unk_t *unk = &ms->parms.unk;

  /* Eliminate compiler warning about unused variables. */
  cstate = 0;

  if (ms->len > 0) {
    if (!(unk->data = jas_malloc(ms->len * sizeof(unsigned char)))) {
      return -1;
    }
    if (jas_stream_read(in, (char *) unk->data, ms->len) != JAS_CAST(int, ms->len)) {
      jas_free(unk->data);
      return -1;
    }
    unk->len = ms->len;
  } else {
    unk->data = 0;
    unk->len = 0;
  }
  return 0;
}

static int jpc_unk_putparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *out)
{
  /* Eliminate compiler warning about unused variables. */
  cstate = 0;
  ms = 0;
  out = 0;

  /* If this function is called, we are trying to write an unsupported
    type of marker segment.  Return with an error indication.  */
  return -1;
}

static int jpc_unk_dumpparms(jpc_ms_t *ms, FILE *out)
{
  unsigned int i;
  jpc_unk_t *unk = &ms->parms.unk;
  for (i = 0; i < unk->len; ++i) {
    fprintf(out, "%02x ", unk->data[i]);
  }
  return 0;
}

/******************************************************************************\
* Primitive I/O operations.
\******************************************************************************/

int jpc_getuint8(jas_stream_t *in, uint_fast8_t *val)
{
  int c;
  if ((c = jas_stream_getc(in)) == EOF) {
    return -1;
  }
  if (val) {
    *val = c;
  }
  return 0;
}

int jpc_putuint8(jas_stream_t *out, uint_fast8_t val)
{
  if (jas_stream_putc(out, val & 0xff) == EOF) {
    return -1;
  }
  return 0;
}

int jpc_getuint16(jas_stream_t *in, uint_fast16_t *val)
{
  uint_fast16_t v;
  int c;
  if ((c = jas_stream_getc(in)) == EOF) {
    return -1;
  }
  v = c;
  if ((c = jas_stream_getc(in)) == EOF) {
    return -1;
  }
  v = (v << 8) | c;
  if (val) {
    *val = v;
  }
  return 0;
}

int jpc_putuint16(jas_stream_t *out, uint_fast16_t val)
{
  if (jas_stream_putc(out, (val >> 8) & 0xff) == EOF ||
    jas_stream_putc(out, val & 0xff) == EOF) {
    return -1;
  }
  return 0;
}

int jpc_getuint32(jas_stream_t *in, uint_fast32_t *val)
{
  uint_fast32_t v;
  int c;
  if ((c = jas_stream_getc(in)) == EOF) {
    return -1;
  }
  v = c;
  if ((c = jas_stream_getc(in)) == EOF) {
    return -1;
  }
  v = (v << 8) | c;
  if ((c = jas_stream_getc(in)) == EOF) {
    return -1;
  }
  v = (v << 8) | c;
  if ((c = jas_stream_getc(in)) == EOF) {
    return -1;
  }
  v = (v << 8) | c;
  if (val) {
    *val = v;
  }
  return 0;
}

int jpc_putuint32(jas_stream_t *out, uint_fast32_t val)
{
  if (jas_stream_putc(out, (val >> 24) & 0xff) == EOF ||
    jas_stream_putc(out, (val >> 16) & 0xff) == EOF ||
    jas_stream_putc(out, (val >> 8) & 0xff) == EOF ||
    jas_stream_putc(out, val & 0xff) == EOF) {
    return -1;
  }
  return 0;
}

/******************************************************************************\
* Miscellany
\******************************************************************************/

static jpc_mstabent_t *jpc_mstab_lookup(int id)
{
  jpc_mstabent_t *mstabent;
  for (mstabent = jpc_mstab;; ++mstabent) {
    if (mstabent->id == id || mstabent->id < 0) {
      return mstabent;
    }
  }
  assert(0);
  return 0;
}

int jpc_validate(jas_stream_t *in)
{
  int n;
  int i;
  unsigned char buf[2];

  assert(JAS_STREAM_MAXPUTBACK >= 2);

  if ((n = jas_stream_read(in, (char *) buf, 2)) < 0) {
    return -1;
  }
  for (i = n - 1; i >= 0; --i) {
    if (jas_stream_ungetc(in, buf[i]) == EOF) {
      return -1;
    }
  }
  if (n < 2) {
    return -1;
  }
  if (buf[0] == (JPC_MS_SOC >> 8) && buf[1] == (JPC_MS_SOC & 0xff)) {
    return 0;
  }
  return -1;
}

int jpc_getdata(jas_stream_t *in, jas_stream_t *out, long len)
{
  return jas_stream_copy(out, in, len);
}

int jpc_putdata(jas_stream_t *out, jas_stream_t *in, long len)
{
  return jas_stream_copy(out, in, len);
}