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https://github.com/Unidata/netcdf-c.git
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85 lines
3.0 KiB
C
85 lines
3.0 KiB
C
/* This program adds two new variables to an existing netCDF file.
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* It is used to test if netCDF can correctly calculate the file offsets
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* for the two new variables, in particular for files that align the
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* fix-size variables to a boundary larger than 4 bytes, for instance
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* a file created by PnetCDF with default alignment of 512 bytes.
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*
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* This program should run after tst_pnetcdf.c and takes the output file
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* from tst_pnetcdf.c as input on the command-line.
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*
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* To check the file offsets for all variables, adding a printf statement is
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* necessary in netcdf-4.3.3.1/libsrc/nc3internal.c around line 222,
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* for example,
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* printf("var %s: begin=%ld len=%ld end=%ld\n",(*vpp)->name->cp, (*vpp)->begin, (*vpp)->len, (*vpp)->begin+(*vpp)->len);
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*
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* Check the first new variable's begin to see whether it is less than
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* the last variable's offset in the existing file.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <netcdf.h>
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#define ERR {if(err!=NC_NOERR){printf("Error at line=%d: %s\n", __LINE__, nc_strerror(err));}}
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int main(int argc, char** argv) {
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int i, j, err, nerrs, ncid, varid[5], dimid[2];
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int old_buf[3][5], get_buf[3][5], new_buf[1024];
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if (argc != 2) {
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printf("Usage: %s [filename]\n",argv[0]);
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exit(0);
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}
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err = nc_open(argv[1], NC_WRITE, &ncid); ERR
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/* read all fixed-size variables */
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err = nc_inq_varid(ncid, "fixed_var_1", &varid[0]);
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err = nc_inq_varid(ncid, "fixed_var_3", &varid[1]);
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err = nc_inq_varid(ncid, "fixed_var_5", &varid[2]);
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err = nc_get_var_int(ncid, varid[0], old_buf[0]); ERR
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err = nc_get_var_int(ncid, varid[1], old_buf[1]); ERR
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err = nc_get_var_int(ncid, varid[2], old_buf[2]); ERR
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err = nc_redef(ncid); ERR
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/* add 2 new dimensions */
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err = nc_def_dim(ncid, "new_dim_1", 32, &dimid[0]); ERR
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err = nc_def_dim(ncid, "new_dim_2", 32, &dimid[1]); ERR
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/* add 2 new dimensions */
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err = nc_def_var(ncid, "new_var1", NC_INT, 2, dimid, &varid[3]); ERR
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err = nc_def_var(ncid, "new_var2", NC_FLOAT, 2, dimid, &varid[4]); ERR
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err = nc_enddef(ncid); ERR
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/* write more than 512 bytes (the default alignment used in PnetCDF) */
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for (i=0; i<1024; i++) new_buf[i] = -1;
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err = nc_put_var_int(ncid, varid[3], new_buf); ERR
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/* read and check all variables from the original file */
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err = nc_get_var_int(ncid, varid[0], get_buf[0]); ERR
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err = nc_get_var_int(ncid, varid[1], get_buf[1]); ERR
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err = nc_get_var_int(ncid, varid[2], get_buf[2]); ERR
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nerrs = 0;
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for (i=0; i<3; i++) {
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char varname[32];
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sprintf(varname, "fixed_var_%d",2*i+1);
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for (j=0; j<5; j++) {
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if (get_buf[i][j] != old_buf[i][j]) {
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printf("Error in %s line %d: expecting %s[%d]=%d but got %d\n",
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__FILE__,__LINE__,varname,j,old_buf[i][j],get_buf[i][j]);
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nerrs++;
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}
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}
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}
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err = nc_close(ncid); ERR
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if (nerrs > 0) exit(-1);
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/*
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SUMMARIZE_ERR;
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FINAL_RESULTS;
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*/
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return 0;
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}
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