hdf5/tools/h5repack/h5repack.c

/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 * Copyright by the Board of Trustees of the University of Illinois.         *
 * All rights reserved.                                                      *
 *                                                                           *
 * This file is part of HDF5.  The full HDF5 copyright notice, including     *
 * terms governing use, modification, and redistribution, is contained in    *
 * the files COPYING and Copyright.html.  COPYING can be found at the root   *
 * of the source code distribution tree; Copyright.html can be found at the  *
 * root level of an installed copy of the electronic HDF5 document set and   *
 * is linked from the top-level documents page.  It can also be found at     *
 * http://hdf.ncsa.uiuc.edu/HDF5/doc/Copyright.html.  If you do not have     *
 * access to either file, you may request a copy from hdfhelp@ncsa.uiuc.edu. *
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

#include <stdlib.h>
#include "h5repack.h"

/*-------------------------------------------------------------------------
 * File: h5repack.c
 * Purpose: Public API functions 
 *-------------------------------------------------------------------------
 */

static int check_options(pack_opt_t *options);


/*-------------------------------------------------------------------------
 * Function: aux_initglb_filter
 *
 * Purpose: auxiliary function, initialize the options global filter
 *
 * Return: void
 *
 *-------------------------------------------------------------------------
 */
static void aux_initglb_filter(pack_opt_t *options)
{
 int k;
 options->filter_g.filtn  = -1;
 for ( k=0; k<CDVALUES; k++) 
  options->filter_g.cd_values[k] = -1;
}


/*-------------------------------------------------------------------------
 * Function: h5repack
 *
 * Purpose: locate all high-level HDF5 objects in the file 
 *  and compress/chunk them using options
 *
 * Algorythm: 2 traversals are made to the file; the 1st builds a list of
 *  the objects, the 2nd makes a copy of them, using the options;
 *  the reason for the 1st traversal is to check for invalid 
 *  object name requests
 *
 * Return: 0, ok, -1, fail
 *
 * Programmer: Pedro Vicente, pvn@ncsa.uiuc.edu
 *
 * Date: September, 22, 2003
 *
 *-------------------------------------------------------------------------
 */
int h5repack(const char* infile, 
             const char* outfile, 
             pack_opt_t *options)
{
 /* check input */
 if (check_options(options)<0)
  return -1;
 
 /* check for objects in input that are in the file */
 if (check_objects(infile,options)<0)
  return -1;
 
 /* copy the file  */
 if (copy_file(infile,outfile,options)<0)
  return -1;

 
 return 0;
}



/*-------------------------------------------------------------------------
 * Function: h5repack_init
 *
 * Purpose: initialize options
 *
 * Return: 0, ok, -1, fail
 *
 *-------------------------------------------------------------------------
 */

int h5repack_init (pack_opt_t *options, 
                   int verbose)
{
 memset(options,0,sizeof(pack_opt_t));
 options->threshold = 1024;
 options->verbose   = verbose;
 return (options_table_init(&(options->op_tbl)));
}

/*-------------------------------------------------------------------------
 * Function: h5repack_end
 *
 * Purpose: free options table
 *
 *-------------------------------------------------------------------------
 */

int h5repack_end  (pack_opt_t *options)
{
 return options_table_free(options->op_tbl);
}

/*-------------------------------------------------------------------------
 * Function: h5repack_addfilter
 *
 * Purpose: add a compression -t option to table 
 *   Example: -t "*:GZIP 6" , STR = "*:GZIP 6"
 *
 * Return: 0, ok, -1, fail
 *
 *-------------------------------------------------------------------------
 */

int h5repack_addfilter(const char* str, 
                       pack_opt_t *options)
{
 obj_list_t      *obj_list=NULL; /*one object list for the -f and -c option entry */
 filter_info_t   filt;           /*filter info for the current -f option entry */
 int             n_objs;         /*number of objects in the current -f or -c option entry */

 if (options->all_filter==1){
  printf("Error: Invalid compression input: all option is present \
   with other objects <%s>\n",str);
  return -1;
 }

 /* parse the -f option */
 obj_list=parse_filter(str,&n_objs,&filt,options);
 if (obj_list==NULL)
 {
  return -1;
 }

 if (options->all_filter==1)
 {
  /* if we are compressing all set the global filter type */
  aux_initglb_filter(options);
  options->filter_g=filt;
 }

 if (options->all_filter==0)
  options_add_filter(obj_list,n_objs,filt,options->op_tbl);

 free(obj_list);
 return 0;
}


/*-------------------------------------------------------------------------
 * Function: h5repack_addlayout
 *
 * Purpose: add a layout option
 *
 * Return: 0, ok, -1, fail
 *
 *-------------------------------------------------------------------------
 */


int h5repack_addlayout(const char* str, 
                       pack_opt_t *options)
{
  
 obj_list_t  *obj_list=NULL;     /*one object list for the -t and -c option entry */
 int         n_objs;             /*number of objects in the current -t or -c option entry */
 int         j;
 pack_info_t pack;               /*info about layout to extract from parse */

 if (options->all_layout==1){
  printf("Error: Invalid layout input: all option \
   is present with other objects <%s>\n",str);
  return -1;
 }
 
 /* parse the layout option */
 obj_list=parse_layout(str,&n_objs,&pack,options);
 if (obj_list==NULL)
  return -1;

 /* set global layout option */
 if (options->all_layout==1 )
 {
  options->layout_g=pack.layout;
  if (pack.layout==H5D_CHUNKED) {
   /* if we are chunking all set the global chunking type */
   options->chunk_g.rank=pack.chunk.rank;
   for (j = 0; j < pack.chunk.rank; j++) 
    options->chunk_g.chunk_lengths[j] = pack.chunk.chunk_lengths[j];
  }
 }

 if (options->all_layout==0)
  options_add_layout(obj_list,
   n_objs,
   &pack,
   options->op_tbl);

 free(obj_list);
 return 0;
}


/*-------------------------------------------------------------------------
 * Function: check_options
 *
 * Purpose: print options, checks for invalid options
 *
 * Return: void, return -1 on error
 *
 * Programmer: Pedro Vicente, pvn@ncsa.uiuc.edu
 *
 * Date: September, 22, 2003
 *
 *-------------------------------------------------------------------------
 */
static int check_options(pack_opt_t *options)
{
 int   i, k, j, has_cp=0, has_ck=0;

 unsigned szip_options_mask=H5_SZIP_NN_OPTION_MASK;
 unsigned szip_pixels_per_block;

/*-------------------------------------------------------------------------
 * objects to layout
 *-------------------------------------------------------------------------
 */
 if (options->verbose) 
 {
  printf("\n");
  printf("Objects to modify are...\n");
  if (options->all_layout==1)  {
   printf("\tApply layout to all\n ");
   if (H5D_CHUNKED==options->layout_g) {
    printf("with dimension [");
    for ( j = 0; j < options->chunk_g.rank; j++)  
     printf("%d ",(int)options->chunk_g.chunk_lengths[j]);
    printf("]\n");
   }
  }
 }/* verbose */

 for ( i = 0; i < options->op_tbl->nelems; i++) 
 {
  char* name=options->op_tbl->objs[i].path;
  
  if (options->op_tbl->objs[i].chunk.rank>0)
  {
   if (options->verbose){
    printf("\t<%s> with chunk size ",name); 
    for ( k = 0; k < options->op_tbl->objs[i].chunk.rank; k++) 
     printf("%d ",(int)options->op_tbl->objs[i].chunk.chunk_lengths[k]);
    printf("\n");
   }
   has_ck=1;
  }
  else if (options->op_tbl->objs[i].chunk.rank==-2)
  {
   if (options->verbose)
    printf("\t%s %s\n",name,"NONE"); 
   has_ck=1;
  }
 }
 
 if (options->all_layout==1 && has_ck){
  printf("Error: Invalid chunking input: all option\
   is present with other objects\n");
  return -1;
 }
 
/*-------------------------------------------------------------------------
 * objects to compress/uncompress
 *-------------------------------------------------------------------------
 */
 
 if (options->verbose) 
 {
  printf("Objects to filter are...\n");
  if (options->all_filter==1) 
  {
   H5Z_filter_t filtn=options->filter_g.filtn;
   switch (filtn)
   {
   case H5Z_FILTER_NONE:
     printf("\tUncompress all %s\n",get_sfilter(filtn));
    break;
   case H5Z_FILTER_SZIP:
     printf("\tCompress all with %s compression\n",get_sfilter(filtn));
    break;
   case H5Z_FILTER_DEFLATE:
     printf("\tCompress all with %s compression, parameter %d\n",
      get_sfilter(filtn),
      options->filter_g.cd_values[0]);
    break;
   };
  }
 } /* verbose */

 for ( i = 0; i < options->op_tbl->nelems; i++) 
 {
  pack_info_t pack  = options->op_tbl->objs[i];
  char*       name = pack.path;

  for ( j=0; j<pack.nfilters; j++)
  {
   if (options->verbose) 
   {
    printf("\t<%s> with %s filter",
     name,
     get_sfilter(pack.filter[j].filtn));
   }

   has_cp=1;
   
   /*check for invalid combination of options */
   switch (pack.filter[j].filtn)
   {
   default:
    break;
   case H5Z_FILTER_SZIP:
    
    szip_pixels_per_block=pack.filter[j].cd_values[0];
    
    /* check szip parameters */
    if (check_szip(pack.chunk.rank,
     pack.chunk.chunk_lengths,
     0, /* do not test size */
     szip_options_mask,
     szip_pixels_per_block)==0)
    {
     /* Return: 1=can apply the filter
                0=cannot apply the filter 
        Reset this object filter info 
      */

     options->op_tbl->objs[i].filter[j].filtn=-1;
     options->op_tbl->objs[i].chunk.rank=-1;
     printf("\tObject <%s> cannot be filtered\n",name);


    }
     
    break;
   } /* switch */
  } /* j */
 } /* i */
 
 if (options->all_filter==1 && has_cp){
  printf("Error: Invalid compression input: all option\
   is present with other objects\n");
  return -1;
 }
 return 0;
}

/*-------------------------------------------------------------------------
 * Function: read_info
 *
 * Purpose: read comp and chunk options from file
 *
 * Return: void, exit on error
 *
 * Programmer: Pedro Vicente, pvn@ncsa.uiuc.edu
 *
 * Date: September, 22, 2003
 *
 *-------------------------------------------------------------------------
 */

void read_info(const char *filename,
               pack_opt_t *options) 
{

 char stype[10];
 char comp_info[1024];
 FILE *fp;
 char c;
 int  i, rc=1;

 
 if ((fp = fopen(filename, "r")) == (FILE *)NULL) {
  printf( "Cannot open options file %s", filename);
  exit(1);
 }

 /* Cycle until end of file reached */
 while( 1 )
 {
  rc=fscanf(fp, "%s", stype);
  if (rc==-1)
   break;
   
 /*-------------------------------------------------------------------------
  * comp
  *-------------------------------------------------------------------------
  */
  if (strcmp(stype,"-t") == 0) { 

   /* find begining of info */
   i=0; c='0';
   while( c!='"' )
   {
    fscanf(fp, "%c", &c);
   }
   c='0';
   /* go until end */
   while( c!='"' )
   {
    fscanf(fp, "%c", &c);
    comp_info[i]=c;
    i++;
   }
   comp_info[i-1]='\0'; /*cut the last " */    

   if (h5repack_addfilter(comp_info,options)==-1){
    printf( "Could not add compression option. Exiting\n");
    exit(1);
   }
  }
 /*-------------------------------------------------------------------------
  * chunk
  *-------------------------------------------------------------------------
  */
  else if (strcmp(stype,"-c") == 0) { 
   
   /* find begining of info */
   i=0; c='0';
   while( c!='"' )
   {
    fscanf(fp, "%c", &c);
   }
   c='0';
   /* go until end */
   while( c!='"' )
   {
    fscanf(fp, "%c", &c);
    comp_info[i]=c;
    i++;
   }
   comp_info[i-1]='\0'; /*cut the last " */    

   if (h5repack_addlayout(comp_info,options)==-1){
    printf( "Could not add chunck option. Exiting\n");
    exit(1);
   }
  }
 /*-------------------------------------------------------------------------
  * not valid
  *-------------------------------------------------------------------------
  */
  else {
   printf( "Bad file format for %s", filename);
   exit(1);
  }
 }

 fclose(fp);
 return;
}