reactos/rostests/apitests/crt/strlen.c

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/*
* PROJECT: ReactOS api tests
* LICENSE: GPLv2+ - See COPYING in the top level directory
* PURPOSE: Test for strlen
* PROGRAMMER: Timo Kreuzer <timo.kreuzer@reactos.org>
*/
#include <apitest.h>
#include <stdio.h>
#include <tchar.h>
#include <pseh/pseh2.h>
#include <ntstatus.h>
typedef _Return_type_success_(return >= 0) long NTSTATUS, *PNTSTATUS;
#ifdef __GNUC__
#pragma GCC diagnostic ignored "-Wnonnull"
size_t
GCC_builtin_strlen(const char *str)
{
return __builtin_strlen(str);
}
#endif
#define EFLAGS_DF 0x400L
typedef size_t (*PFN_STRLEN)(const char *);
void
Test_strlen(PFN_STRLEN pstrlen)
{
size_t len;
#if defined(_M_IX86) || defined(_M_AMD64)
volatile uintptr_t eflags;
char *teststr = "a\0bcdefghijk";
#endif
/* basic parameter tests */
StartSeh()
len = pstrlen(NULL);
EndSeh(STATUS_ACCESS_VIOLATION);
(void)len;
ok_int((int)pstrlen("test"), 4);
#if defined(_M_IX86) || defined(_M_AMD64)
eflags = __readeflags();
__writeeflags(eflags | EFLAGS_DF);
len = pstrlen(teststr + 4);
eflags = __readeflags();
ok((eflags & EFLAGS_DF) != 0, "Direction flag in ELFAGS was changed.");
/* Only test this for the exported versions, intrinsics might do it
differently. It's up to us to not do fishy stuff! Also crtdll does
not do it like this. */
#ifndef TEST_CRTDLL
if (pstrlen == strlen)
{
ok(len == 8, "Should not have gone backwards (got len %i)", (int)len);
}
#endif // TEST_CRTDLL
#endif
}
START_TEST(strlen)
{
Test_strlen(strlen);
#ifdef __GNUC__
Test_strlen(GCC_builtin_strlen);
#endif // __GNUC__
}