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-rw-r--r--test/external_common.c121
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diff --git a/test/external_common.c b/test/external_common.c
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+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * Copyright by The HDF Group. *
+ * Copyright by the Board of Trustees of the University of Illinois. *
+ * All rights reserved. *
+ * *
+ * This file is part of HDF5. The full HDF5 copyright notice, including *
+ * terms governing use, modification, and redistribution, is contained in *
+ * the COPYING file, which can be found at the root of the source code *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases. *
+ * If you do not have access to either file, you may request a copy from *
+ * help@hdfgroup.org. *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+/*
+ * Programmer: Raymond Lu <songyulu@hdfgroup.org>
+ * April, 2019
+ *
+ * Purpose: Private function for external.c and external_env.c
+ */
+
+#include "external_common.h"
+
+
+/*-------------------------------------------------------------------------
+ * Function: reset_raw_data_files
+ *
+ * Purpose: Resets the data in the raw data files for tests that
+ * perform dataset I/O on a set of files.
+ *
+ * Return: SUCCEED/FAIL
+ *
+ * Programmer: Dana Robinson
+ * February 2016
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+reset_raw_data_files(void)
+{
+ int fd = 0; /* external file descriptor */
+ size_t i, j; /* iterators */
+ hssize_t n; /* bytes of I/O */
+ char filename[1024]; /* file name */
+ int data[PART_SIZE]; /* raw data buffer */
+ uint8_t *garbage = NULL; /* buffer of garbage data */
+ size_t garbage_count; /* size of garbage buffer */
+ size_t garbage_bytes; /* # of garbage bytes written to file */
+
+ /* Set up garbage buffer */
+ garbage_count = N_EXT_FILES * GARBAGE_PER_FILE;
+ if(NULL == (garbage = (uint8_t *)HDcalloc(garbage_count, sizeof(uint8_t))))
+ goto error;
+ for(i = 0; i < garbage_count; i++)
+ garbage[i] = 0xFF;
+
+ /* The *r files are pre-filled with data and are used to
+ * verify that read operations work correctly.
+ */
+ for(i = 0; i < N_EXT_FILES; i++) {
+
+ /* Open file */
+ HDsprintf(filename, "extern_%lur.raw", (unsigned long)i + 1);
+ if((fd = HDopen(filename, O_RDWR|O_CREAT|O_TRUNC, H5_POSIX_CREATE_MODE_RW)) < 0)
+ goto error;
+
+ /* Write garbage data to the file. This allows us to test the
+ * the ability to set an offset in the raw data file.
+ */
+ garbage_bytes = i * 10;
+ n = HDwrite(fd, garbage, garbage_bytes);
+ if(n < 0 || (size_t)n != garbage_bytes)
+ goto error;
+
+ /* Fill array with data */
+ for(j = 0; j < PART_SIZE; j++) {
+ data[j] = (int)(i * 25 + j);
+ } /* end for */
+
+ /* Write raw data to the file. */
+ n = HDwrite(fd, data, sizeof(data));
+ if(n != sizeof(data))
+ goto error;
+
+ /* Close this file */
+ HDclose(fd);
+
+ } /* end for */
+
+ /* The *w files are only pre-filled with the garbage data and are
+ * used to verify that write operations work correctly. The individual
+ * tests fill in the actual data.
+ */
+ for(i = 0; i < N_EXT_FILES; i++) {
+
+ /* Open file */
+ HDsprintf(filename, "extern_%luw.raw", (unsigned long)i + 1);
+ if((fd = HDopen(filename, O_RDWR|O_CREAT|O_TRUNC, H5_POSIX_CREATE_MODE_RW)) < 0)
+ goto error;
+
+ /* Write garbage data to the file. This allows us to test the
+ * the ability to set an offset in the raw data file.
+ */
+ garbage_bytes = i * 10;
+ n = HDwrite(fd, garbage, garbage_bytes);
+ if(n < 0 || (size_t)n != garbage_bytes)
+ goto error;
+
+ /* Close this file */
+ HDclose(fd);
+
+ } /* end for */
+ HDfree(garbage);
+ return SUCCEED;
+
+error:
+ if(fd)
+ HDclose(fd);
+ if(garbage)
+ HDfree(garbage);
+ return FAIL;
+}