debufr.c

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#include <ctype.h>
#include <string.h>
#include <stdio.h>
#include <libgen.h>
#include <unistd.h>
 
#include "bufrlib.h"
#include "cobfl.h"
 
#ifdef UNDERSCORE
#define fdebufr fdebufr_
#define prtusage prtusage_
#endif
 
void fdebufr( char *, char *, f77int *, char *, char *, char *, char *, char *,
              size_t, size_t, size_t, size_t, size_t, size_t, size_t );
void prtusage( char * );
 
#define MXFLEN 500
#define MXFLEN_TBLFIL (MXFLEN+50)
 
void prtusage( char *prgnam ) {
    printf( "\nUSAGE:\n" );
    printf( "  %s [-v] [-h] [-b] [-c] [-m] [-o outfile] [-t tabledir] [-f tablefil] [-p prmstg] bufrfile\n\n", prgnam );
    printf( "\nWHERE:\n" );
    printf( "    -v        prints program version information and exits\n\n" );
    printf( "    -h        prints program help and usage information and exits\n\n" );
    printf( "    -b        specifies the \"basic\" option, meaning that only the\n" );
    printf( "              information in Sections 0-3 will be decoded from each\n" );
    printf( "              BUFR message in the bufrfile, and no attempt will be\n" );
    printf( "              made to decode the data in Section 4\n\n" );
    printf( "    -c        specifies that code and flag table meanings should not\n" );
    printf( "              be read from master BUFR tables and included in the output;\n" );
    printf( "              otherwise this feature is enabled by default\n\n" );
    printf( "    -m        specifies that master BUFR tables will be used to\n" );
    printf( "              decode the data messages in the file, regardless of\n" );
    printf( "              whether it contains any embedded DX BUFR table messages.\n" );
    printf( "              This option can be used to view the actual contents of\n" );
    printf( "              DX BUFR table messages, which otherwise would not be\n" );
    printf( "              printed in the output listing.\n\n" );
    printf( "    outfile   [path/]name of file to contain verbose output listing.\n" );
    printf( "              The default is \"bufrfilename.debufr.out\" in the current\n" );
    printf( "              working directory, where bufrfilename is the basename of\n" );
    printf( "              the bufrfile (i.e. bufrfile with any preceding [path/]\n" );
    printf( "              removed).\n\n" );
    printf( "    tabledir  [path/]name of directory containing tables to be used\n" );
    printf( "              for decoding.  This directory contains the DX BUFR tables\n" );
    printf( "              file to be used (if one was specified via the -f option),\n" );
    printf( "              or it may contain all of the master BUFR tables when these\n" );
    printf( "              are being used to decode a file.  If unspecified, the\n" );
    printf( "              default directory location is\n" );
    printf( "          \"/home/jeffa/build/install/tables\"\n\n" );
    printf( "    tablefil  file within tabledir containing DX BUFR tables to be used\n" );
    printf( "              for decoding.\n\n" );
    printf( "     prmstg   string of comma-separated PARAMETER=VALUE pairs, up to a\n" );
    printf( "              maximum of 20.  For each pair, the dynamic allocation\n" );
    printf( "              PARAMETER will be set to VALUE within the underlying\n" );
    printf( "              BUFRLIB software, overriding the default value that would\n" );
    printf( "              otherwise be used.  A complete list of parameters that can\n" );
    printf( "              be dynamically sized is included within the documentation\n" );
    printf( "              for BUFRLIB function isetprm.\n\n" );
    printf( "    bufrfile  [path/]name of BUFR file to be decoded\n\n" );
}
 
int main( int argc, char *argv[ ] ) {
 
    int ch;
 
    char basic = 'N';
    char forcemt = 'N';
    char cfms = 'Y';
    char io = 'r';
    char tbldir[MXFLEN] =
        "/home/jeffa/build/install/tables";
    char outfile[MXFLEN];
    char wkstr[MXFLEN];
    char wkstr2[MXFLEN];
    char tblfil[MXFLEN_TBLFIL];
    char prmstg[300] = "NULLPSTG";
    char bvstr[9] = "        ";
 
    unsigned short ii;
 
    f77int lentd;
    
    /*
    **  Get and process the valid options from the command line:
    */
    wkstr[0] = '\0';  /* initialize to empty string */
    outfile[0] = '\0';  /* initialize to empty string */
    while ( ( ch = getopt ( argc, argv, "vhbcmo:t:f:p:" ) ) != EOF ) {
        switch ( ch ) {
        case 'v':
            bvers ( bvstr, sizeof(bvstr) );
            /* append a trailing NULL to bvstr for printf */
            for ( ii = 0; ii < sizeof(bvstr); ii++ ) {
            if ( ( bvstr[ii] != '.' ) && ( !isdigit(bvstr[ii]) ) ) {
              bvstr[ii] = '\0';
              break;
            }
            }
            printf( "This is debufr v3.1.1, built with BUFRLIB v%s\n",
                bvstr );
            return 0;
        case 'h':
            printf( "\nPROGRAM %s\n", argv[0] );
            printf( "\nABSTRACT: This program decodes a BUFR file and generates a verbose\n" );
            printf( "  listing of the contents.  If a DX BUFR tables file is specified\n" );
            printf( "  (using the -f option) or if the specified BUFR file contains an\n" );
            printf( "  embedded DX BUFR tables message as the first message in the file,\n" );
            printf( "  then this DX BUFR tables information is used to decode the data\n" );
            printf( "  messages in the file.  Otherwise, or whenever the -m option is\n" );
            printf( "  specified, master BUFR tables are read and used to decode the\n" );
            printf( "  data messages in the file.\n" );
            prtusage( argv[0] );
            return 0;
            break;
        case 'b':
            basic = 'Y';
            break;
        case 'm':
            forcemt = 'Y';
            break;
        case 'c':
            cfms = 'N';
            break;
        case 'o':
            strcpy ( outfile, optarg );
            break;
        case 't':
            strcpy ( tbldir, optarg );
            break;
        case 'f':
            strcpy ( wkstr, optarg );
            break;
        case 'p':
            strcpy ( prmstg, optarg );
            break;
        }
    }
 
    /*
    **  There should be one remaining command line argument specifying the
    **  input BUFR file.
    */
    if ( (optind+1) != argc ) {
        printf( "\nERROR: You must specify an input BUFR file to be decoded!\n" );
        prtusage( argv[0] );
        return -1;
        }
 
    /*
    **  Open the input BUFR file.
    */
    cobfl( argv[optind], &io );
 
    /*
    **  Check whether a DX tables file was specified.
    */
    if ( strlen( wkstr ) > 0 ) {
        sprintf( tblfil, "%s%c%s", tbldir, '/', wkstr );
    }
    else {
        strcpy( tblfil, "NULLFILE" );
    }
 
    /*
    **  Check whether an output file was specified.  If not, make a default
    **  filename in the current working directory using the basename of the
    **  input BUFR file.
    */
    if ( strlen( outfile ) == 0 ) {
        strcpy( wkstr2, argv[optind] );
        strcpy( outfile, basename( wkstr2 ) );
        strcat( outfile, ".debufr.out" );
    }
 
    /*
    **  Confirm that the output directory is writeable.
    */
    strcpy( wkstr2, outfile );
    strcpy( wkstr, dirname( wkstr2 ) );
    if ( access( wkstr, W_OK ) != 0 ) {
        printf( "\nERROR: Cannot write output file to directory %s\n",
        ( strcmp( wkstr, "." ) == 0 ? getcwd( wkstr2, MXFLEN ) : wkstr ) );
        prtusage( argv[0] );
        return -1;
    }
 
    /*
    **  Read and decode each message from the input BUFR file.
    */
    lentd = (f77int) strlen(tbldir);
    fdebufr( outfile, tbldir, &lentd, tblfil, prmstg, &basic, &forcemt, &cfms,
         strlen(outfile), strlen(tbldir), strlen(tblfil), strlen(prmstg), 1, 1, 1 );
 
    /*
    **  Close the input BUFR file.
    */
    ccbfl( );
 
    return 0;
}