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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 2)
**
** Purpose: Tests the PAL implementation of the ReadFile function.
** Creates a test file and performs an array of read tests.
**
** Assumes successful:
** CreateFile
** CloseHandle
** WriteFile
** 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";
//Previously number of tests was 6, now 4 refer VSW 312690
#define NOOFTESTS 4
const int PAGESIZE = 4096;
char *readBuffer;
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, dwBytesRead) != 0)
{
Trace("read = %s string = %s", szString, szStringTest);
return FALSE;
}
return TRUE;
}
BOOL readTest(DWORD dwByteCount, char cResult)
{
HANDLE hFile = NULL;
DWORD dwBytesRead;
BOOL bRc = FALSE;
// 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(readBuffer, 0, PAGESIZE);
bRc = ReadFile(hFile, readBuffer, dwByteCount, &dwBytesRead, NULL);
if (bRc == FALSE)
{
// if it failed, was it supposed to fail?
if (cResult == '1')
{
Trace("\nbRc = %d\n", bRc);
Trace("readBuffer = [%s] dwByteCount = %d dwBytesRead = %d\n", readBuffer, 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(readBuffer, dwByteCount, dwBytesRead));
}
}
CloseHandle(hFile);
return TRUE;
}
int __cdecl main(int argc, char *argv[])
{
HANDLE hFile = NULL;
const int BUFFER_SIZE = 2 * PAGESIZE;
DWORD dwByteCount[] = { 0,
10,
strlen(szStringTest),
PAGESIZE
// Commented out two negative test cases : Refer VSW 312690
// 2 * PAGESIZE,
// -1
};
DWORD oldProt;
char szResults[] = "1111"; // Was "111100": Refer VSW 312690
int i;
BOOL bRc = FALSE;
DWORD dwBytesWritten = 0;
if (0 != PAL_Initialize(argc,argv))
{
return FAIL;
}
/* aloocate read-write memery for readBuffer */
if (!(readBuffer = (char*) VirtualAlloc(NULL, BUFFER_SIZE, MEM_COMMIT, PAGE_READWRITE)))
{
Fail("VirtualAlloc failed: GetLastError returns %d\n", GetLastError());
return FAIL;
}
/* write protect the second page of readBuffer */
if (!VirtualProtect(&readBuffer[PAGESIZE], PAGESIZE, PAGE_NOACCESS, &oldProt))
{
Fail("VirtualProtect failed: GetLastError returns %d\n", GetLastError());
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\" (%d).\n",
szReadableFile, GetLastError());
}
bRc = WriteFile(hFile, szStringTest, strlen(szStringTest), &dwBytesWritten, NULL);
CloseHandle(hFile);
for (i = 0; i< NOOFTESTS; i++)
{
bRc = readTest(dwByteCount[i], szResults[i]);
if (bRc != TRUE)
{
Fail("ReadFile: ERROR -> Failed on test[%d]\n", i);
}
}
VirtualFree(readBuffer, BUFFER_SIZE, MEM_RELEASE);
PAL_Terminate();
return PASS;
}
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