Wiring in a large test to check against a regression for the issue described in https://github.com/Unidata/netcdf-c/pull/457

nc_test/CMakeLists.txt

@@ -51,7 +51,7 @@ IF(USE_PNETCDF)
 ENDIF()
 
 IF(LARGE_FILE_TESTS)
-  SET(TESTS ${TESTS} quick_large_files tst_big_var6 tst_big_var2 tst_big_rvar tst_big_var tst_large)
+  SET(TESTS ${TESTS} quick_large_files tst_big_var6 tst_big_var2 tst_big_rvar tst_big_var tst_large tst_large_cdf5)
   IF(NOT MSVC)
     SET(TESTS ${TESTS} large_files)
   ENDIF()

nc_test/Makefile.am

@@ -16,7 +16,8 @@ tst_*.nc t_nc.nc large_files.nc quick_large_files.nc \
 tst_diskless.nc tst_diskless2.nc \
 tst_diskless3.nc tst_diskless3_file.cdl tst_diskless3_memory.cdl \
 tst_diskless4.cdl tst_diskless4.nc tst_formatx.nc nc_test_cdf5.nc \
-unlim.nc tst_inq_type.nc tst_elatefill.nc tst_global_fillval.nc
+unlim.nc tst_inq_type.nc tst_elatefill.nc tst_global_fillval.nc \
+tst_large_cdf5.nc
 
 check_PROGRAMS =
 
@@ -45,7 +46,7 @@ AM_CPPFLAGS += -I$(top_builddir)/liblib -I$(top_builddir)/include -I$(top_srcdir
 # If the user asked for large file tests, then add them.
 if LARGE_FILE_TESTS
 TESTPROGRAMS += quick_large_files tst_big_var6 tst_big_var2	\
-tst_big_rvar tst_big_var tst_large large_files
+tst_big_rvar tst_big_var tst_large large_files tst_large_cdf5
 endif # LARGE_FILE_TESTS
 
 if BUILD_BENCHMARKS

nc_test/tst_large_cdf5.c

@@ -0,0 +1,179 @@
+/*
+  Copyright 2017, UCAR/Unidata
+  See COPYRIGHT file for copying and redistribution conditions.
+
+  This program tests the large file bug in netCDF 3.6.2,
+  creating byte and short variables larger than 4 GiB.
+
+  This program is based on tst_large.c, and tests against
+  CDF5.
+
+  $Id: tst_large.c,v 1.16 2010/05/18 20:20:01 russ Exp $
+*/
+#include <config.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <nc_tests.h>
+#include "err_macros.h"
+#include <netcdf.h>
+
+/* Test with both classic and 64-bit offset files. If netcdf-4 is
+ * included, test with both netCDF-4 format variants also. */
+#ifdef USE_NETCDF4
+#define NUM_FORMATS (4)
+#else
+#define NUM_FORMATS (2)
+#endif
+
+#define NUMDIMS 2		/* rank of each variable in tests */
+#define DIM1 2048
+#define DIM2 2097153		/* DIM1*DIM2*sizeof(char)   > 2**32 */
+#define DIM3 1024
+#define DIM4 2097153		/* DIM3*DIM4*sizeof(short)  > 2**32  */
+
+/*
+ * In netCDF-3.6.2, a divide by zero occurs on 32-bit platforms when
+ * creating a variable for which the product of dimensions is exactly
+ * 2**32.  Check that this bug has been fixed.
+ */
+static int
+test_big_var(const char *testfile) {
+    int ncid, varid, dimids[NUMDIMS];
+    int cflag = NC_CLOBBER;
+    nc_type type = NC_BYTE;
+    size_t index[NUMDIMS];
+    signed char nval = 99;
+    int nval_in;
+
+    /* Define the file with one large variable. */
+    if (nc_create(testfile, cflag|NC_64BIT_DATA, &ncid)) ERR;
+    if (nc_set_fill(ncid, NC_NOFILL, NULL)) ERR;
+    if (nc_def_dim(ncid, "dim1", DIM1, &dimids[0])) ERR;
+    if (nc_def_dim(ncid, "dim2", DIM2 - 1, &dimids[1])) ERR;
+    if (nc_def_var(ncid, "var", type, NUMDIMS, dimids, &varid)) ERR;
+    if (nc_enddef(ncid)) ERR;
+
+    /* Write one datum, near the end of the variable. */
+    index[0] = DIM1 - 1;
+    index[1] = DIM2 - 2;
+    if (nc_put_var1_schar(ncid, varid, index, &nval)) ERR;
+    if (nc_close(ncid)) ERR;
+
+    /* Reopen the file and check that datum. */
+    if (nc_open(testfile, NC_NOWRITE, &ncid)) ERR;
+    if (nc_inq_varid(ncid, "var", &varid)) ERR;
+    if (nc_get_var1_int(ncid, varid, index, &nval_in)) ERR;
+    if (nval != nval_in)
+	ERR;
+    if (nc_close(ncid)) ERR;
+    return 0;
+}
+
+static int
+test_large_byte_var(const char *testfile) {
+    int ncid, varid, dimids[NUMDIMS];
+    size_t index[NUMDIMS] = {0, 0};
+    signed char vals[DIM2];
+    signed char char_val_in;
+    size_t start[NUMDIMS], count[NUMDIMS];
+    int j;
+
+    if (nc_create(testfile, NC_CLOBBER|NC_64BIT_DATA, &ncid)) ERR;
+    if (nc_set_fill(ncid, NC_NOFILL, NULL)) ERR;
+    if (nc_def_dim(ncid, "dim1", DIM1, &dimids[0])) ERR;
+    if (nc_def_dim(ncid, "dim2", DIM2, &dimids[1])) ERR;
+    if (nc_def_var(ncid, "var", NC_BYTE, NUMDIMS, dimids, &varid)) ERR;
+    if (nc_enddef(ncid)) ERR;
+
+    for (j = 0; j < DIM2; j++) {
+       vals[j] = 9 * (j + 11); /* note vals[j] is 99 when j==0 */
+    }
+    start[1] = 0;
+    count[0] = 1;
+    count[1] = DIM2;
+    for (start[0] = 0; start[0] < DIM1; start[0]++) {
+	if (nc_put_vara_schar(ncid, varid, start, count, vals))
+	{
+	    ERR;
+	    break;
+	}
+    }
+
+    if (nc_close(ncid)) ERR;
+    if (nc_open(testfile, NC_NOWRITE, &ncid)) ERR;
+    if (nc_inq_varid(ncid, "var", &varid)) ERR;
+    if (nc_get_var1_schar(ncid, varid, index, &char_val_in)) ERR;
+    if (char_val_in != 99)	/* see above, the value written when start[0]==0, j==0 */
+	ERR;
+    if (nc_close(ncid)) ERR;
+    return 0;
+}
+
+static int
+test_large_short_var(const char *testfile) {
+    int ncid, varid, dimids[NUMDIMS];
+    int int_val_in, int_val_out = 99;
+    size_t index[2];
+    int cflag = NC_CLOBBER;
+
+    if (nc_create(testfile, cflag|NC_64BIT_DATA, &ncid)) ERR;
+    if (nc_def_dim(ncid, "dim3", DIM3, &dimids[0])) ERR;
+    if (nc_def_dim(ncid, "dim4", DIM4, &dimids[1])) ERR;
+    if (nc_def_var(ncid, "var", NC_SHORT, NUMDIMS, dimids, &varid)) ERR;
+    if (nc_enddef(ncid)) ERR;
+    index[0] = 0;
+    index[1] = 1;
+    if (nc_put_var1_int(ncid, varid, index, &int_val_out)) ERR;
+    if (nc_close(ncid)) ERR;
+    if (nc_open(testfile, NC_NOWRITE, &ncid)) ERR;
+    if (nc_inq_varid(ncid, "var", &varid)) ERR;
+    if (nc_get_var1_int(ncid, varid, index, &int_val_in)) ERR;
+    if (int_val_in != int_val_out)
+	ERR;
+#ifndef NOFILL
+    index[0] = 1;
+    index[1] = 2;
+    if (nc_get_var1_int(ncid, varid, index, &int_val_in)) ERR;
+    if (int_val_in != NC_FILL_SHORT)
+	ERR;
+#endif
+    if (nc_close(ncid)) ERR;
+    return 0;
+}
+
+#define FILE_NAME "tst_large_cdf5.nc"
+
+int
+main(int argc, char **argv) {
+    int i;
+    char testfile[NC_MAX_NAME + 1];
+
+    sprintf(testfile, "%s/%s", TEMP_LARGE, FILE_NAME);
+
+    printf("\n*** Testing fix for 3.6.2 large file bug in %s.\n",
+	   testfile);
+   /* Go thru formats and run all tests for each of two (for netCDF-3
+    * only builds), or 4 (for netCDF-4 builds) different formats. */
+    for (i = NC_FORMAT_CLASSIC; i <= NUM_FORMATS; i++)
+    {
+       nc_set_default_format(i, NULL);
+
+       printf("*** testing format %d with a variable with 2**32 values...", i);
+       test_big_var(testfile);
+       (void) remove(testfile);
+       SUMMARIZE_ERR;
+
+       printf("*** testing format %d with a byte variable with > 2**32 values...", i);
+       test_large_byte_var(testfile);
+       (void) remove(testfile);
+       SUMMARIZE_ERR;
+
+       printf("*** testing format %d with a short variable with > 2**32 values...", i);
+       test_large_short_var(testfile);
+       (void) remove(testfile);
+       SUMMARIZE_ERR;
+    }
+
+    FINAL_RESULTS;
+}