summaryrefslogtreecommitdiff
path: root/src/pal/tests/palsuite/c_runtime/fgets/test1/test1.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'src/pal/tests/palsuite/c_runtime/fgets/test1/test1.cpp')
-rw-r--r--src/pal/tests/palsuite/c_runtime/fgets/test1/test1.cpp102
1 files changed, 102 insertions, 0 deletions
diff --git a/src/pal/tests/palsuite/c_runtime/fgets/test1/test1.cpp b/src/pal/tests/palsuite/c_runtime/fgets/test1/test1.cpp
new file mode 100644
index 0000000..5e0e62d
--- /dev/null
+++ b/src/pal/tests/palsuite/c_runtime/fgets/test1/test1.cpp
@@ -0,0 +1,102 @@
+// 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;
+
+}
+
+