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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: ReadFile.c (test 3)
**
** Purpose: Tests the PAL implementation of the ReadFile function.
** Creates a test file and performs an array of sequential read
** tests.
**
** Assumes successful:
** CreateFile
** CloseHandle
** memset
** WriteFile
** CreateFile
** CloseHandle
** GetLastError
**
**
**===================================================================*/
#include <palsuite.h>
const char* szStringTest = "The quick fox jumped over the lazy dog's back.\0";
const char* szEmptyString = "";
const char* szReadableFile = "Readable.txt";
const char* szResultsFile = "Results.txt";
BOOL validateResults(const char* szString, // string read
DWORD dwByteCount, // amount requested
DWORD dwBytesRead) // amount read
{
// were the correct number of bytes read?
if (dwBytesRead > dwByteCount)
{
Trace("bytes read > bytes asked for\n");
return FALSE;
}
if (dwBytesRead != strlen(szString))
{
Trace("bytes read != length of read string\n");
return FALSE;
}
//
// compare results
//
if (memcmp(szString, szStringTest, dwByteCount) != 0)
{
Trace("read = %s string = %s", szString, szStringTest);
return FALSE;
}
return TRUE;
}
BOOL readTest(DWORD dwByteCount, char cResult)
{
HANDLE hFile = NULL;
DWORD dwBytesRead = 0;
DWORD dwTotal = 0;
DWORD dwRequested = 0;
BOOL bRc = FALSE;
char szString[100];
char* szPtr = szString;
int i = 0;
// open the test file
hFile = CreateFile(szReadableFile,
GENERIC_READ,
FILE_SHARE_READ,
NULL,
OPEN_EXISTING,
FILE_ATTRIBUTE_NORMAL,
NULL);
if(hFile == INVALID_HANDLE_VALUE)
{
Trace("ReadFile: ERROR -> Unable to open file \"%s\".\n",
szReadableFile);
return FALSE;
}
memset(szString, 0, 100);
for (i = 0; i < 5; i++)
{
bRc = ReadFile(hFile, szPtr, dwByteCount, &dwBytesRead, NULL);
szPtr += dwByteCount;
dwTotal += dwBytesRead;
dwRequested += dwByteCount;
}
if (bRc == FALSE)
{
// if it failed, was it supposed to fail?
if (cResult == '1')
{
Trace("\nbRc = %d\n", bRc);
Trace("szString = [%s] dwByteCount = %d dwBytesRead = %d\n",
szString,
dwByteCount,
dwBytesRead);
Trace ("cresult = 1\n");
Trace ("getlasterror = %d\n", GetLastError());
CloseHandle(hFile);
return FALSE;
}
}
else
{
CloseHandle(hFile);
// if it passed, was it supposed to pass?
if (cResult == '0')
{
Trace ("cresult = 0\n");
return FALSE;
}
else
{
return (validateResults(szString, dwRequested, dwTotal));
}
}
CloseHandle(hFile);
return TRUE;
}
int __cdecl main(int argc, char **argv)
{
HANDLE hFile = NULL;
DWORD dwByteCount[4] = {0, 1, 2, 3};
char szResults[4] = {'1', '1', '1', '1'};
int i;
BOOL bRc = FALSE;
DWORD dwBytesWritten = 0;
if (0 != PAL_Initialize(argc,argv))
{
return FAIL;
}
// create the test file
hFile = CreateFile(szReadableFile,
GENERIC_WRITE,
FILE_SHARE_WRITE,
NULL,
CREATE_ALWAYS,
FILE_ATTRIBUTE_NORMAL,
NULL);
if(hFile == INVALID_HANDLE_VALUE)
{
Fail("ReadFile: ERROR -> Unable to create file \"%s\".\n",
szReadableFile);
}
bRc = WriteFile(hFile, szStringTest, strlen(szStringTest),
&dwBytesWritten,
NULL);
CloseHandle(hFile);
for (i = 0; i < 4; i++)
{
bRc = readTest(dwByteCount[i], szResults[i]);
if (bRc != TRUE)
{
Fail("ReadFile: ERROR -> Failed on test[%d]\n", i);
}
}
PAL_Terminate();
return PASS;
}
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