mirror of https://github.com/ecmwf/eccodes.git
72 lines
1.7 KiB
C
72 lines
1.7 KiB
C
/*
|
|
* Copyright 2005-2015 ECMWF.
|
|
*
|
|
* This software is licensed under the terms of the Apache Licence Version 2.0
|
|
* which can be obtained at http://www.apache.org/licenses/LICENSE-2.0.
|
|
*
|
|
* In applying this licence, ECMWF does not waive the privileges and immunities granted to it by
|
|
* virtue of its status as an intergovernmental organisation nor does it submit to any jurisdiction.
|
|
*/
|
|
|
|
#include "config.h"
|
|
/* #include <sys/types.h> */
|
|
/* #include <inttypes.h> */
|
|
/* #include <stdio.h> */
|
|
/* #include <stdlib.h> */
|
|
/* #include <errno.h> */
|
|
/* #include <string.h> */
|
|
#include "grib_api_internal.h"
|
|
#include <unistd.h>
|
|
|
|
void usage(char* prog) {
|
|
printf("usage: %s filename\n",prog);
|
|
exit(1);
|
|
}
|
|
|
|
int main(int argc,char* argv[]) {
|
|
off_t offsetin=0,offsetout=0;
|
|
off_t size=100000000;
|
|
size_t rsizein=10,rsizeout=0;
|
|
double doff=0;
|
|
FILE* f=0;
|
|
char str[10];
|
|
int i;
|
|
|
|
if (argc != 2) usage(argv[0]);
|
|
|
|
printf("sizeof(off_t)=%d sizeof(long)=%d\n",sizeof(off_t),sizeof(long));
|
|
|
|
f=fopen(argv[1],"r");
|
|
if (!f) {
|
|
printf("%s\n",strerror(errno));
|
|
exit(errno);
|
|
}
|
|
|
|
offsetin=size;
|
|
for (i=0;i<100000;i++) {
|
|
printf("i=%d ",i);
|
|
if (fseeko(f,offsetin,SEEK_SET) ) {
|
|
printf("fseeko error\n");
|
|
printf("- %d - %s\n",errno,strerror(errno));
|
|
exit(1);
|
|
}
|
|
rsizeout=fread(str,1,rsizein,f);
|
|
if (rsizeout != rsizein ) {
|
|
printf("rsizein=%d rsizeout=%d\n",rsizein,rsizeout);
|
|
printf("end of file\n");
|
|
exit(1);
|
|
}
|
|
offsetout=ftello(f);
|
|
doff=(double)offsetout;
|
|
printf("%20.0f \n",doff);
|
|
if (offsetout != offsetin+rsizeout) {
|
|
printf("offset error: offsetout=%jd offsetin=%jd\n",offsetout,offsetin+rsizeout);
|
|
exit(1);
|
|
}
|
|
offsetin=offsetout+size;
|
|
}
|
|
|
|
fclose(f);
|
|
return 0;
|
|
}
|