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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: Writes a simple file and calls fgets() to get a string shorter
** than the first line of the file. Verifies that the correct
** string is returned.
**
**
**==========================================================================*/
#include <palsuite.h>
int __cdecl main(int argc, char **argv)
{
const char outBuf1[] = "This is a test.\n";
const char outBuf2[] = "This is too.";
char inBuf[sizeof(outBuf1) + sizeof(outBuf2)];
const char filename[] = "testfile.tmp";
const int offset = 5; /* value chosen arbitrarily */
int actualLen;
int expectedLen;
FILE * fp;
if (PAL_Initialize(argc, argv))
{
return FAIL;
}
/*write the file that we will use to test */
fp = fopen(filename, "w");
if (fp == NULL)
{
Fail("Unable to open file for write.\n");
}
fwrite(outBuf1, sizeof(outBuf1[0]), sizeof(outBuf1), fp);
fwrite(outBuf2, sizeof(outBuf2[0]), sizeof(outBuf2), fp);
if (fclose(fp) != 0)
{
Fail("Error closing a file opened for write.\n");
}
/*now read back the entire first string*/
fp = fopen(filename, "r");
if (fp == NULL)
{
Fail("Unable to open file for read.\n");
}
/*note: +1 because strlen() returns the length of a string _not_
including the NULL, while fgets() returns a string of specified
maximum length _including_ the NULL.*/
if (fgets(inBuf, strlen(outBuf1) - offset + 1, fp) != inBuf)
{
Fail("Error reading from file using fgets.\n");
}
expectedLen = strlen(outBuf1) - offset;
actualLen = strlen(inBuf);
if (actualLen < expectedLen)
{
Fail("fgets() was asked to read a one-line string and given the "
"length of the string as a parameter. The string it has "
"read is too short.\n");
}
if (actualLen > expectedLen)
{
Fail("fgets() was asked to read a one-line string and given the "
"length of the string as a parameter. The string it has "
"read is too long.\n");
}
if (memcmp(inBuf, outBuf1, actualLen) != 0)
{
/*We didn't read back exactly outBuf1*/
Fail("fgets() was asked to read a one-line string, and given the "
"length of the string as an parameter. It has returned a "
"string of the correct length, but the contents are not "
"correct.\n");
}
if (fclose(fp) != 0)
{
Fail("Error closing file after using fgets().\n");
}
PAL_Terminate();
return PASS;
}
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