mirror of https://github.com/ecmwf/eccodes.git
64 lines
1.7 KiB
C++
64 lines
1.7 KiB
C++
/*
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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 "grib_api_internal.h"
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#ifndef ECCODES_ON_WINDOWS
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#include <unistd.h>
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#endif
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int main(int argc, char* argv[])
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{
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off_t offsetin = 0, offsetout = 0;
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off_t size = 100000000;
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size_t rsizein = 10, rsizeout = 0;
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double doff = 0;
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FILE* f = 0;
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char str[10];
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int i;
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if (argc != 2) return 1;
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printf("sizeof(off_t)=%zu sizeof(long)=%zu\n", sizeof(off_t), sizeof(long));
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f = fopen(argv[1], "r");
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if (!f) {
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printf("%s\n", strerror(errno));
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exit(errno);
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}
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offsetin = size;
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for (i = 0; i < 100000; i++) {
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printf("i=%d ", i);
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if (fseeko(f, offsetin, SEEK_SET)) {
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printf("fseeko error\n");
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printf("- %d - %s\n", errno, strerror(errno));
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exit(1);
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}
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rsizeout = fread(str, 1, rsizein, f);
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if (rsizeout != rsizein) {
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printf("rsizein=%zu rsizeout=%zu\n", rsizein, rsizeout);
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printf("end of file\n");
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exit(1);
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}
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offsetout = ftello(f);
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doff = (double)offsetout;
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printf("%20.0f \n", doff);
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if (offsetout != offsetin + rsizeout) {
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printf("offset error: offsetout=%jd offsetin=%jd\n", offsetout, offsetin + rsizeout);
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exit(1);
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}
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offsetin = offsetout + size;
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}
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fclose(f);
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return 0;
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}
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