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+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+/*=====================================================================
+**
+** Source: test1.c
+**
+** Purpose: Tests the PAL implementation of the fread function.
+** Open a file in READ mode, and then try to read all
+** the characters, more than all the characters,
+** 0 characters and 0 sized characters and check that
+** the return values are correct.
+**
+** Depends:
+** fopen
+** fseek
+** fclose
+**
+**
+**===================================================================*/
+
+/* Note: testfile should exist in the directory with 15 characters
+ in it ... something got lost if it isn't here.
+*/
+
+/* Note: Under win32, fread() crashes when passed NULL. The test to ensure that
+ it returns 0 has been removed to reflect this.
+*/
+
+#include <palsuite.h>
+
+int __cdecl main(int argc, char **argv)
+{
+ const char filename[] = "testfile";
+ char buffer[128];
+ FILE * fp = NULL;
+ int result;
+
+ if (0 != PAL_Initialize(argc, argv))
+ {
+ return FAIL;
+ }
+
+ /* Open a file in READ mode */
+
+ if((fp = fopen(filename, "r")) == NULL)
+ {
+ Fail("Unable to open a file for reading. Is the file "
+ "in the directory? It should be.");
+ }
+
+ /* Read 15 characters from the file. The file has exactly this many
+ in it.
+ */
+ if((result = fread(buffer,1,15,fp)) == 0)
+ {
+ Fail("ERROR: Zero characters read from the file. It should have "
+ "15 characters in it.");
+ }
+
+ if(result != 15)
+ {
+ Fail("ERROR: The fread function should have returned that it read "
+ "in 15 characters from the file. But it indicates having "
+ "read %i characters.",result);
+ }
+
+ /* Go back to the start of the file */
+
+ if(fseek(fp, 0, SEEK_SET))
+ {
+ Fail("ERROR: fseek failed, and this test depends on it.");
+ }
+
+ /* Attempt to read 17 characters, the return should still be 15 */
+
+ if((result = fread(buffer,1,17,fp)) == 0)
+ {
+ Fail("ERROR: Zero characters read from the file. It should have "
+ "15 characters in it. Though, it attempted to read 17.");
+ }
+
+ if(result != 15)
+ {
+ Fail("ERROR: The fread function should have returned that it read "
+ "in 15 characters from the file. "
+ "But it indicates having read %i characters.",result);
+ }
+
+ /* Back to the start of the file */
+
+ if(fseek(fp, 0, SEEK_SET))
+ {
+ Fail("ERROR: fseek failed, and this test depends on it.");
+ }
+
+ /* Read 0 characters and ensure the function returns 0 */
+
+ if((result = fread(buffer,1,0,fp)) != 0)
+ {
+ Fail("ERROR: The return value should be 0, as we attempted to "
+ "read 0 characters.");
+ }
+
+ /* Read characters of 0 size and ensure the return value is 0 */
+
+ if((result = fread(buffer,0,5,fp)) != 0)
+ {
+ Fail("ERROR: The return value should be 0, as we attempted to "
+ "read 0 sized data.");
+ }
+
+ /* Close the file */
+
+ if(fclose(fp))
+ {
+ Fail("ERROR: fclose failed. Test depends on it.");
+ }
+
+ /* Read 5 characters of 1 size from a closed file pointer
+ and ensure the return value is 0
+ */
+
+ if((result = fread(buffer,1,5,fp)) != 0)
+ {
+ Fail("ERROR: The return value should be 0, as we attempted to "
+ "read data from a closed file pointer.");
+ }
+
+ PAL_Terminate();
+ return PASS;
+}
+
+