rostests/apitests/crt/strlen.c

   1 /*
   2  * PROJECT:         ReactOS api tests
   3  * LICENSE:         GPLv2+ - See COPYING in the top level directory
   4  * PURPOSE:         Test for strlen
   5  * PROGRAMMER:      Timo Kreuzer <timo.kreuzer@reactos.org>
   6  */
   7
   8 #include <apitest.h>
   9
  10 #include <stdio.h>
  11 #include <tchar.h>
  12 #include <pseh/pseh2.h>
  13 #include <ntstatus.h>
  14 typedef _Return_type_success_(return >= 0) long NTSTATUS, *PNTSTATUS;
  15
  16 #ifdef __GNUC__
  17 #pragma GCC diagnostic ignored "-Wnonnull"
  18
  19 size_t
  20 GCC_builtin_strlen(const char *str)
  21 {
  22     return __builtin_strlen(str);
  23 }
  24 #endif
  25
  26 #define EFLAGS_DF 0x400L
  27
  28 typedef size_t (*PFN_STRLEN)(const char *);
  29
  30 void
  31 Test_strlen(PFN_STRLEN pstrlen)
  32 {
  33     size_t len;
  34 #if defined(_M_IX86) || defined(_M_AMD64)
  35     volatile uintptr_t eflags;
  36     char *teststr = "a\0bcdefghijk";
  37 #endif
  38
  39     /* basic parameter tests */
  40     StartSeh()
  41         len = pstrlen(NULL);
  42     EndSeh(STATUS_ACCESS_VIOLATION);
  43     (void)len;
  44
  45     ok_int((int)pstrlen("test"), 4);
  46
  47 #if defined(_M_IX86) || defined(_M_AMD64)
  48     eflags = __readeflags();
  49     __writeeflags(eflags | EFLAGS_DF);
  50     len = pstrlen(teststr + 4);
  51     eflags = __readeflags();
  52     ok((eflags & EFLAGS_DF) != 0, "Direction flag in ELFAGS was changed.");
  53
  54     /* Only test this for the exported versions, intrinsics might do it
  55        differently. It's up to us to not do fishy stuff! Also crtdll does
  56        not do it like this. */
  57 #ifndef TEST_CRTDLL
  58     if (pstrlen == strlen)
  59     {
  60         ok(len == 8, "Should not have gone backwards (got len %i)", (int)len);
  61     }
  62 #endif // TEST_CRTDLL
  63 #endif
  64 }
  65
  66 START_TEST(strlen)
  67 {
  68     Test_strlen(strlen);
  69 #ifdef __GNUC__
  70     Test_strlen(GCC_builtin_strlen);
  71 #endif // __GNUC__
  72 }