mirror of https://github.com/ecmwf/eccodes.git
87 lines
3.1 KiB
C++
87 lines
3.1 KiB
C++
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/*
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* (C) Copyright 2005- ECMWF.
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*
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* This software is licensed under the terms of the Apache Licence Version 2.0
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* which can be obtained at http://www.apache.org/licenses/LICENSE-2.0.
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*
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* In applying this licence, ECMWF does not waive the privileges and immunities granted to it by
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* virtue of its status as an intergovernmental organisation nor does it submit to any jurisdiction.
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*/
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#include <stdio.h>
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#include "eccodes.h"
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#undef NDEBUG
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#include <assert.h>
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static void usage(const char* app)
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{
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fprintf(stderr, "Usage is: %s input_file ouput_file\n", app);
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}
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int main(int argc, char* argv[])
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{
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FILE* in = NULL;
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FILE* out = NULL;
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codes_handle* source_handle = NULL;
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const void* buffer = NULL;
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int err = 0;
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long totalLength_src = 0, totalLength_dst = 0;
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long edition = 0;
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long dataSectionLength_src = 0, dataSectionLength_dst = 0;
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long bitmapPresent_dst = 0, isConstant = 0;
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size_t messageLength_src = 0, messageLength_dst = 0;
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if (argc != 3) {
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usage(argv[0]);
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return 1;
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}
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in = fopen(argv[1], "rb");
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assert(in);
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out = fopen(argv[2], "wb");
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assert(out);
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while ((source_handle = codes_handle_new_from_file(0, in, PRODUCT_GRIB, &err)) != NULL) {
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codes_handle* clone_handle = codes_handle_clone_lightweight(source_handle);
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assert(clone_handle);
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CODES_CHECK(codes_get_message(source_handle, &buffer, &messageLength_src), 0);
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CODES_CHECK(codes_get_message(clone_handle, &buffer, &messageLength_dst), 0);
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assert( messageLength_src > messageLength_dst );
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CODES_CHECK(codes_get_long(source_handle, "totalLength", &totalLength_src), 0);
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CODES_CHECK(codes_get_long(clone_handle, "totalLength", &totalLength_dst), 0);
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assert(totalLength_src > totalLength_dst);
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CODES_CHECK(codes_get_long(source_handle, "edition", &edition), 0);
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if (edition == 1) {
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CODES_CHECK(codes_get_long(source_handle, "section4Length", &dataSectionLength_src), 0);
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CODES_CHECK(codes_get_long(clone_handle, "section4Length", &dataSectionLength_dst), 0);
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} else if (edition == 2) {
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CODES_CHECK(codes_get_long(source_handle, "section7Length", &dataSectionLength_src), 0);
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CODES_CHECK(codes_get_long(clone_handle, "section7Length", &dataSectionLength_dst), 0);
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}
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//printf("sectionLengths: %ld %ld\n", dataSectionLength_src, dataSectionLength_dst);
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assert( dataSectionLength_src > dataSectionLength_dst );
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codes_get_long(clone_handle, "bitmapPresent", &bitmapPresent_dst);
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assert(bitmapPresent_dst == 0);
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codes_get_long(clone_handle, "isConstant", &isConstant);
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assert(isConstant == 1);
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/* write out the cloned buffer */
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if (fwrite(buffer, 1, messageLength_dst, out) != messageLength_dst) {
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perror(argv[1]);
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return 1;
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}
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codes_handle_delete(clone_handle);
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codes_handle_delete(source_handle);
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}
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fclose(out);
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fclose(in);
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printf("All OK\n");
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return 0;
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}
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