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/* ************************************************************************** */
/* * * */
/* * COPYRIGHT NOTICE: * */
/* * * */
/* * Copyright (c) 2000 Gerard Juyn (gerard :at: libmng.com) * */
/* * [You may insert additional notices after this sentence if you modify * */
/* * this source] * */
/* * * */
/* * For the purposes of this copyright and license, "Contributing Authors" * */
/* * is defined as the following set of individuals: * */
/* * * */
/* * Gerard Juyn * */
/* * (hopefully some more to come...) * */
/* * * */
/* * The MNG Library is supplied "AS IS". The Contributing Authors * */
/* * disclaim all warranties, expressed or implied, including, without * */
/* * limitation, the warranties of merchantability and of fitness for any * */
/* * purpose. The Contributing Authors assume no liability for direct, * */
/* * indirect, incidental, special, exemplary, or consequential damages, * */
/* * which may result from the use of the MNG Library, even if advised of * */
/* * the possibility of such damage. * */
/* * * */
/* * Permission is hereby granted to use, copy, modify, and distribute this * */
/* * source code, or portions hereof, for any purpose, without fee, subject * */
/* * to the following restrictions: * */
/* * * */
/* * 1. The origin of this source code must not be misrepresented; * */
/* * you must not claim that you wrote the original software. * */
/* * * */
/* * 2. Altered versions must be plainly marked as such and must not be * */
/* * misrepresented as being the original source. * */
/* * * */
/* * 3. This Copyright notice may not be removed or altered from any source * */
/* * or altered source distribution. * */
/* * * */
/* * The Contributing Authors specifically permit, without fee, and * */
/* * encourage the use of this source code as a component to supporting * */
/* * the MNG and JNG file format in commercial products. If you use this * */
/* * source code in a product, acknowledgment would be highly appreciated. * */
/* * * */
/* ************************************************************************** */
/* * * */
/* * project : mngtree * */
/* * file : mngtree.c copyright (c) 2000 G.Juyn * */
/* * version : 1.0.1 * */
/* * * */
/* * purpose : main project file * */
/* * * */
/* * author : G.Juyn * */
/* * web : http://www.3-t.com * */
/* * email : mailto:info@3-t.com * */
/* * * */
/* * comment : mngtree simply dumps the chunk-structure of the supplied * */
/* * first parameter to stdout (should be a xNG-file) * */
/* * * */
/* * changes : 0.5.2 - 06/03/2000 - G.Juyn * */
/* * - fixed for compilation under Linux * */
/* * 0.5.3 - 06/26/2000 - G.Juyn * */
/* * - changed definition of userdata to mng_ptr * */
/* * 0.5.3 - 06/28/2000 - G.Juyn * */
/* * - changed memory allocation size parameters to mng_size_t * */
/* * * */
/* * 1.0.1 - 12/07/2003 - G.Juyn * */
/* * - fixed inclusion of libmng.h (Thanks Raphael) * */
/* * * */
/* ************************************************************************** */
#include <stdio.h>
#include <stdlib.h>
#include <strings.h>
#include "../../../libmng.h"
/* ************************************************************************** */
typedef struct user_struct {
FILE *hFile; /* file handle */
int iIndent; /* for nice indented formatting */
} userdata;
typedef userdata * userdatap;
/* ************************************************************************** */
mng_ptr myalloc (mng_size_t iSize)
{ /* duh! */
return (mng_ptr)calloc (1, (size_t)iSize);
}
/* ************************************************************************** */
void myfree (mng_ptr pPtr, mng_size_t iSize)
{
free (pPtr); /* duh! */
return;
}
/* ************************************************************************** */
mng_bool myopenstream (mng_handle hMNG)
{
return MNG_TRUE; /* already opened in main function */
}
/* ************************************************************************** */
mng_bool myclosestream (mng_handle hMNG)
{
return MNG_TRUE; /* gets closed in main function */
}
/* ************************************************************************** */
mng_bool myreaddata (mng_handle hMNG,
mng_ptr pBuf,
mng_uint32 iSize,
mng_uint32 *iRead)
{ /* get to my file handle */
userdatap pMydata = (userdatap)mng_get_userdata (hMNG);
/* read it */
*iRead = fread (pBuf, 1, iSize, pMydata->hFile);
/* iRead will indicate EOF */
return MNG_TRUE;
}
/* ************************************************************************** */
mng_bool myiterchunk (mng_handle hMNG,
mng_handle hChunk,
mng_chunkid iChunktype,
mng_uint32 iChunkseq)
{ /* get to my file handle */
userdatap pMydata = (userdatap)mng_get_userdata (hMNG);
char aCh[4];
char zIndent[80];
int iX;
/* decode the chunkname */
aCh[0] = (char)((iChunktype >> 24) & 0xFF);
aCh[1] = (char)((iChunktype >> 16) & 0xFF);
aCh[2] = (char)((iChunktype >> 8) & 0xFF);
aCh[3] = (char)((iChunktype ) & 0xFF);
/* indent less ? */
if ( (iChunktype == MNG_UINT_MEND) || (iChunktype == MNG_UINT_IEND) ||
(iChunktype == MNG_UINT_ENDL) )
pMydata->iIndent -= 2;
/* this looks ugly; but I haven't
figured out how to do it prettier */
for (iX = 0; iX < pMydata->iIndent; iX++)
zIndent[iX] = ' ';
zIndent[pMydata->iIndent] = '\0';
/* print a nicely indented line */
printf ("%s%c%c%c%c\n", zIndent, aCh[0], aCh[1], aCh[2], aCh[3]);
/* indent more ? */
if ( (iChunktype == MNG_UINT_MHDR) || (iChunktype == MNG_UINT_IHDR) ||
(iChunktype == MNG_UINT_JHDR) || (iChunktype == MNG_UINT_DHDR) ||
(iChunktype == MNG_UINT_BASI) || (iChunktype == MNG_UINT_LOOP) )
pMydata->iIndent += 2;
return MNG_TRUE; /* keep'm coming... */
}
/* ************************************************************************** */
int dumptree (char * zFilename)
{
userdatap pMydata;
mng_handle hMNG;
mng_retcode iRC;
/* get a data buffer */
pMydata = (userdatap)calloc (1, sizeof (userdata));
if (pMydata == NULL) /* oke ? */
{
fprintf (stderr, "Cannot allocate a data buffer.\n");
return 1;
}
/* can we open the file ? */
if ((pMydata->hFile = fopen (zFilename, "rb")) == NULL)
{ /* error out if we can't */
fprintf (stderr, "Cannot open input file %s.\n", zFilename);
return 1;
}
/* let's initialize the library */
hMNG = mng_initialize ((mng_ptr)pMydata, myalloc, myfree, MNG_NULL);
if (!hMNG) /* did that work out ? */
{
fprintf (stderr, "Cannot initialize libmng.\n");
iRC = 1;
}
else
{ /* setup callbacks */
if ( ((iRC = mng_setcb_openstream (hMNG, myopenstream )) != 0) ||
((iRC = mng_setcb_closestream (hMNG, myclosestream)) != 0) ||
((iRC = mng_setcb_readdata (hMNG, myreaddata )) != 0) )
fprintf (stderr, "Cannot set callbacks for libmng.\n");
else
{ /* read the file into memory */
if ((iRC = mng_read (hMNG)) != 0)
fprintf (stderr, "Cannot read the file.\n");
else
{
pMydata->iIndent = 2; /* start of the indenting at a nice level */
printf ("Starting dump of %s.\n\n", zFilename);
/* run through the chunk list */
if ((iRC = mng_iterate_chunks (hMNG, 0, myiterchunk)) != 0)
fprintf (stderr, "Cannot iterate the chunks.\n");
printf ("\nDone.\n");
}
}
mng_cleanup (&hMNG); /* cleanup the library */
}
fclose (pMydata->hFile); /* cleanup */
free (pMydata);
return iRC;
}
/* ************************************************************************** */
int main(int argc, char *argv[])
{
if (argc > 1) /* need that first parameter ! */
return dumptree (argv[1]);
else
printf ("\nUsage: mngtree <file.mng>\n\n");
return 0;
}
/* ************************************************************************** */
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