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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: test3.c
**
** Purpose: Tests the PAL implementation of the fread function.
** Open a file in READ mode, then try to read from the file with
** different 'size' params. Check to ensure the return values and
** the text in the buffer is correct.
**
** Depends:
** fopen
** fseek
** strcmp
** memset
**
**
**===================================================================*/
/* Note: testfile should exist in the directory with 15 characters
in it ... something got lost if it isn't here.
*/
#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.");
}
memset(buffer,'x',128);
/* Put the null one character past the end of the text that was read
in, to ensure that it wasn't reading in 0
*/
buffer[16] = '\0';
/* Attempt to read in 5 bytes at a time. This should return 3 and
contain the full string in the buffer.
*/
if((result = fread(buffer,5,3,fp)) != 3)
{
Fail("ERROR: Attempted to read in data of size 5. The file has "
"15 bytes in it so 3 items should have been read. But the value "
"returned was %d.",result);
}
if(strcmp(buffer, "This is a test.x") != 0)
{
Fail("ERROR: The buffer should have contained the text "
"'This is a test.x' but instead contained '%s'.",buffer);
}
memset(buffer,'x',128);
if(fseek(fp, 0, SEEK_SET))
{
Fail("ERROR: fseek failed, and this test depends on it.");
}
buffer[16] = '\0';
/* Attempt to read in 6 bytes at a time. The return should be 2. The
full string should still be in the buffer.
*/
if((result = fread(buffer,6,3,fp)) != 2)
{
Fail("ERROR: Attempted to read in data of size 6. The file has "
"15 bytes in it, so 2 items should have been read. But the "
"value returned was %d.",result);
}
if(strcmp(buffer, "This is a test.x") != 0)
{
Fail("ERROR: The buffer should have contained the text "
"'This is a test.x' but instead contained '%s'.",buffer);
}
memset(buffer,'x',128);
buffer[7] = '\0';
if(fseek(fp, 0, SEEK_SET))
{
Fail("ERROR: fseek failed, and this test depends on it.");
}
/* Attempt to read in 6 bytes at a time but only one item max.
The return should be 1. The first 6 characters should be in the
buffer.
*/
if((result = fread(buffer,6,1,fp)) != 1)
{
Fail("ERROR: Attempted to read in data of size 6 with a max count "
"of 1. Thus, one item should have been read, but the "
"value returned was %d.",result);
}
if(strcmp(buffer, "This ix") != 0)
{
Fail("ERROR: The buffer should have contained the text "
"'This ix.' but instead contained '%s'.",buffer);
}
PAL_Terminate();
return PASS;
}
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