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/*
* dump - Example simple BUFR/CREX dump program
*
* Copyright (C) 2010 ARPA-SIM <urpsim@smr.arpa.emr.it>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* Author: Enrico Zini <enrico@enricozini.com>
*/
// Messages are read in a Bulletin class
#include <wreport/bulletin.h>
#include <string>
#include <cstdio>
#include <strings.h>
using namespace std;
/**
* Little enum we use to represent the choice of encoding from the command line
*/
enum Encoding { BUFR, CREX };
/**
* Dump a BUFR or CREX file.
*
* We use a single template for both bulletin types, as they have exactly the
* same API.
*/
template<typename TYPE>
void dump(FILE* in, const char* fname)
{
try {
// Bulletin to use to store the decoded data
TYPE bulletin;
// Each bulletin type has a read function that reads the next
// message from any input stream into a string buffer
string buf;
while (TYPE::read(in, buf, fname))
{
// Decode the raw data filling in the bulletin
bulletin.decode(buf);
// Dump it all to stdout
bulletin.print(stdout);
}
} catch (std::exception& e) {
// Errors are reported through exceptions. All exceptions used
// by wreport are descendents of std::exception
fprintf(stderr, "Error reading %s: %s\n", fname, e.what());
}
}
/// Select the right bulletin type according to the requested format
void dump(Encoding type, FILE* in, const char* fname)
{
switch (type)
{
case BUFR: dump<wreport::BufrBulletin>(in, fname); break;
case CREX: dump<wreport::CrexBulletin>(in, fname); break;
}
}
const char* argv0 = "dump";
/// Print program usage
void usage()
{
fprintf(stderr, "Usage: %s {BUFR|CREX} [file1 [file2...]]\n", argv0);
fprintf(stderr, "Dumps bufr or crex file contents to standard output\n");
}
int main(int argc, const char* argv[])
{
argv0 = argv[0];
if (argc == 1)
{
usage();
return 1;
}
// Detect what encoding type is requested
Encoding type;
if (strcasecmp(argv[1], "BUFR") == 0)
type = BUFR;
else if (strcasecmp(argv[1], "CREX") == 0)
type = CREX;
else
{
usage();
return 1;
}
if (argc == 2)
{
// Dump stdin if no input file was given
printf("Dumping standard input...\n");
dump(type, stdin, "standard input");
} else {
// Else dump all input files
for (int i = 2; i < argc; ++i)
{
printf("Dumping file %s...\n", argv[i]);
FILE* in = fopen(argv[i], "rb");
if (in == NULL)
{
perror("cannot open file");
continue;
}
dump(type, in, argv[i]);
fclose(in);
}
}
return 0;
}
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