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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: getc.c (test 1)
**
** Purpose: Tests the PAL implementation of the getc function.
**
**
**===================================================================*/
#include <palsuite.h>
int __cdecl main(int argc, char *argv[])
{
const char szFileName[] = {"testfile.tmp"};
const char szTestString[] =
{"The quick brown fox jumped over the lazy dog's back."};
FILE* pFile = NULL;
int nCount = 0;
int nChar = 0;
char szBuiltString[256];
if (0 != PAL_Initialize(argc,argv))
{
return FAIL;
}
memset(szBuiltString, 0, 256);
/* create/open a file for read and write */
pFile = fopen(szFileName, "w+");
if (pFile == NULL)
{
Fail("getc: ERROR -> fopen failed to create the file %s with the "
"error code %ld\n",
szFileName,
GetLastError());
}
/* try reading from an empty file */
if ((nChar = getc(pFile)) != EOF)
{
Trace("getc: ERROR -> getc returned \"%c\" when run on "
"an empty file.\n", nChar);
if (fclose(pFile) != 0)
{
Trace("getc: ERROR -> fclose failed to close the file. "
"GetLastError returned %ld\n",
GetLastError());
}
Fail("");
}
// Move the file pointer back to the beginning of the file. Some
// platforms require an fseek() between a getc() that returns EOF
// and any subsequent output to the file.
if (fseek(pFile, 0, SEEK_SET) != 0)
{
Trace("getc: ERROR -> fseek failed to move the file pointer to the "
"beginning of the file. GetLastError returned %ld\n",
GetLastError());
if (fclose(pFile) != 0)
{
Trace("getc: ERROR -> fclose failed to close the file. "
"GetLastError returned %ld\n",
GetLastError());
}
Fail("");
}
/* populate the file with a known string */
nCount = fprintf(pFile, szTestString);
if (nCount != strlen(szTestString))
{
Fail("getc: ERROR -> fprintf failed to write %s. The string is %d "
"characters long but fprintf apparently only wrote %d characters."
" GetLastError returned %ld\n",
szTestString,
strlen(szTestString),
nCount,
GetLastError());
}
/* move the file pointer back to the beginning of the file */
if (fseek(pFile, 0, SEEK_SET) != 0)
{
Trace("getc: ERROR -> fseek failed to move the file pointer to the "
"beginning of the file. GetLastError returned %ld\n",
GetLastError());
if (fclose(pFile) != 0)
{
Trace("getc: ERROR -> fclose failed to close the file. "
"GetLastError returned %ld\n",
GetLastError());
}
Fail("");
}
/* now get the characters one at a time */
nCount = 0;
while ((nChar = getc(pFile)) != EOF)
{
szBuiltString[nCount++] = nChar;
}
/* now, let's see if it worked */
if (strcmp(szBuiltString, szTestString) != 0)
{
Trace("getc: ERROR -> Reading one char at a time, getc built \"%s\" "
"however it should have built \"%s\".\n",
szBuiltString,
szTestString);
if (fclose(pFile) != 0)
{
Trace("getc: ERROR -> fclose failed to close the file. "
"GetLastError returned %ld\n",
GetLastError());
}
Fail("");
}
/* with the file pointer at EOF, try reading past EOF*/
if ((nChar = getc(pFile)) != EOF)
{
Trace("getc: ERROR -> getc returned \"%c\" when reading past "
"the end of the file.\n", nChar);
if (fclose(pFile) != 0)
{
Trace("getc: ERROR -> fclose failed to close the file. "
"GetLastError returned %ld\n",
GetLastError());
}
Fail("");
}
if (fclose(pFile) != 0)
{
Fail("getc: ERROR -> fclose failed to close the file. "
"GetLastError returned %ld\n",
GetLastError());
}
PAL_Terminate();
return PASS;
}
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