#include "wx/wx.h"
#endif // WX_PRECOMP
-#include "wx/tokenzr.h"
-
// ----------------------------------------------------------------------------
// test class
// ----------------------------------------------------------------------------
CPPUNIT_TEST( PChar );
CPPUNIT_TEST( Format );
CPPUNIT_TEST( Constructors );
-#if wxUSE_WCHAR_T
- CPPUNIT_TEST( ConstructorsWithConversion );
- CPPUNIT_TEST( Conversion );
- CPPUNIT_TEST( ConversionUTF7 );
- CPPUNIT_TEST( ConversionUTF8 );
-#endif // wxUSE_WCHAR_T
CPPUNIT_TEST( Extraction );
+ CPPUNIT_TEST( Trim );
CPPUNIT_TEST( Find );
- CPPUNIT_TEST( Tokenizer );
- CPPUNIT_TEST( TokenizerGetPosition );
CPPUNIT_TEST( Replace );
CPPUNIT_TEST( Match );
CPPUNIT_TEST( CaseChanges );
CPPUNIT_TEST( Compare );
CPPUNIT_TEST( CompareNoCase );
+ CPPUNIT_TEST( Contains );
+ CPPUNIT_TEST( ToLong );
+ CPPUNIT_TEST( ToULong );
+#ifdef wxLongLong_t
+ CPPUNIT_TEST( ToLongLong );
+ CPPUNIT_TEST( ToULongLong );
+#endif // wxLongLong_t
+ CPPUNIT_TEST( ToDouble );
+ CPPUNIT_TEST( WriteBuf );
CPPUNIT_TEST_SUITE_END();
void String();
void PChar();
void Format();
void Constructors();
-#if wxUSE_WCHAR_T
- void ConstructorsWithConversion();
- void Conversion();
- void ConversionUTF7();
- void ConversionUTF8();
-#endif // wxUSE_WCHAR_T
void Extraction();
+ void Trim();
void Find();
- void SingleTokenizerTest( wxChar *str, wxChar *delims, size_t count , wxStringTokenizerMode mode );
- void Tokenizer();
- void TokenizerGetPosition();
void Replace();
void Match();
void CaseChanges();
void Compare();
void CompareNoCase();
-
-#if wxUSE_WCHAR_T
- // test if converting s using the given encoding gives ws and vice versa
- //
- // if either of the first 2 arguments is NULL, the conversion is supposed
- // to fail
- void DoTestConversion(const char *s, const wchar_t *w, wxCSConv& conv);
-#endif // wxUSE_WCHAR_T
+ void Contains();
+ void ToLong();
+ void ToULong();
+#ifdef wxLongLong_t
+ void ToLongLong();
+ void ToULongLong();
+#endif // wxLongLong_t
+ void ToDouble();
+ void WriteBuf();
DECLARE_NO_COPY_CLASS(StringTestCase)
};
CPPUNIT_ASSERT( s1 == wxString::Format(_T("%03d"), 18) );
s2.Printf(_T("Number 18: %s\n"), s1.c_str());
CPPUNIT_ASSERT( s2 == wxString::Format(_T("Number 18: %s\n"), s1.c_str()) );
+
+ static const size_t lengths[] = { 1, 512, 1024, 1025, 2048, 4096, 4097 };
+ for ( size_t n = 0; n < WXSIZEOF(lengths); n++ )
+ {
+ const size_t len = lengths[n];
+
+ wxString s(_T('Z'), len);
+ CPPUNIT_ASSERT_EQUAL( len, wxString::Format(_T("%s"), s.c_str()).length());
+ }
}
void StringTestCase::Constructors()
TEST_CTOR((start, end), _T("really"));
}
-#if wxUSE_WCHAR_T
-void StringTestCase::ConstructorsWithConversion()
-{
- // the string "Déjà" in UTF-8 and wchar_t:
- const unsigned char utf8Buf[] = {0x44,0xC3,0xA9,0x6A,0xC3,0xA0,0};
- const wchar_t wchar[] = {0x44,0xE9,0x6A,0xE0,0};
- const unsigned char utf8subBuf[] = {0x44,0xC3,0xA9,0x6A,0}; // just "Déj"
- const char *utf8 = (char *)utf8Buf;
- const char *utf8sub = (char *)utf8subBuf;
-
- wxString s1(utf8, wxConvUTF8);
- wxString s2(wchar, wxConvUTF8);
-
-#if wxUSE_UNICODE
- CPPUNIT_ASSERT( s1 == wchar );
- CPPUNIT_ASSERT( s2 == wchar );
-#else
- CPPUNIT_ASSERT( s1 == utf8 );
- CPPUNIT_ASSERT( s2 == utf8 );
-#endif
-
- wxString sub(utf8sub, wxConvUTF8); // "Dej" substring
- wxString s3(utf8, wxConvUTF8, 4);
- wxString s4(wchar, wxConvUTF8, 3);
-
- CPPUNIT_ASSERT( s3 == sub );
- CPPUNIT_ASSERT( s4 == sub );
-
-#if wxUSE_UNICODE
- CPPUNIT_ASSERT ( wxString("\t[pl]open.format.Sformatuj dyskietkê=gfloppy %f",
- wxConvUTF8) == wxT("") ); //should stop at pos 35
-#endif
-}
-
-void StringTestCase::Conversion()
-{
-#if wxUSE_UNICODE
- wxString szTheString(L"The\0String", wxConvLibc, 10);
- wxCharBuffer theBuffer = szTheString.mb_str();
-
- CPPUNIT_ASSERT( memcmp(theBuffer.data(), "The\0String", 11) == 0 );
-
- wxString szTheString2("The\0String", wxConvLocal, 10);
- CPPUNIT_ASSERT( szTheString2.length() == 11 );
- CPPUNIT_ASSERT( wxTmemcmp(szTheString2.c_str(), L"The\0String", 11) == 0 );
-#else
- wxString szTheString(wxT("TheString"));
- szTheString.insert(3, 1, '\0');
- wxWCharBuffer theBuffer = szTheString.wc_str(wxConvLibc);
-
- CPPUNIT_ASSERT( memcmp(theBuffer.data(), L"The\0String", 11 * sizeof(wchar_t)) == 0 );
-
- wxString szLocalTheString(wxT("TheString"));
- szLocalTheString.insert(3, 1, '\0');
- wxWCharBuffer theLocalBuffer = szLocalTheString.wc_str(wxConvLocal);
-
- CPPUNIT_ASSERT( memcmp(theLocalBuffer.data(), L"The\0String", 11 * sizeof(wchar_t)) == 0 );
-#endif
-}
-
-// in case wcscmp is missing
-//
-static int wx_wcscmp(const wchar_t *s1, const wchar_t *s2)
-{
- for (;;) {
- if (*s1 != *s2)
- return *s1 - *s2;
- if (*s1 == 0)
- break;
- s1++;
- s2++;
- }
- return 0;
-}
-
-void
-StringTestCase::DoTestConversion(const char *s,
- const wchar_t *ws,
- wxCSConv& conv)
-{
-#if wxUSE_UNICODE
- if ( ws )
- {
- wxCharBuffer buf(wxString(ws).mb_str(conv));
-
- CPPUNIT_ASSERT( strcmp(buf, s) == 0 );
- }
-#else // wxUSE_UNICODE
- if ( s )
- {
- wxWCharBuffer wbuf(wxString(s).wc_str(conv));
-
- if ( ws )
- CPPUNIT_ASSERT( wx_wcscmp(wbuf, ws) == 0 );
- else
- CPPUNIT_ASSERT( !*wbuf );
- }
-#endif // wxUSE_UNICODE/!wxUSE_UNICODE
-}
-
-struct StringConversionData
-{
- const char *str;
- const wchar_t *wcs;
-};
-
-void StringTestCase::ConversionUTF7()
-{
- static const StringConversionData utf7data[] =
- {
- { "+-", L"+" },
- { "+--", L"+-" },
- //\u isn't recognized on MSVC 6
-#if !defined(_MSC_VER)
-#if !defined(__GNUC__) || (__GNUC__ >= 3)
- { "+AKM-", L"\u00a3" },
-#endif
-#endif
- // Windows accepts invalid UTF-7 strings and so does our UTF-7
- // conversion code -- this is wrong IMO but the way it is for now
- //
- // notice that converting "+" still behaves as expected because the
- // result is just an empty string, i.e. the same as if there were an
- // error, but converting "a+" results in "a" while it really should
- // fail
- { "+", NULL },
- { "a+", L"a" },
- };
-
- wxCSConv conv(_T("utf-7"));
- for ( size_t n = 0; n < WXSIZEOF(utf7data); n++ )
- {
- const StringConversionData& d = utf7data[n];
- DoTestConversion(d.str, d.wcs, conv);
- }
-}
-
-void StringTestCase::ConversionUTF8()
-{
- static const StringConversionData utf8data[] =
- {
- //\u isn't recognized on MSVC 6
-#if !defined(_MSC_VER)
-#if !defined(__GNUC__) || (__GNUC__ >= 3)
- { "\xc2\xa3", L"\u00a3" },
-#endif
-#endif
- { "\xc2", NULL },
- };
-
- wxCSConv conv(_T("utf-8"));
- for ( size_t n = 0; n < WXSIZEOF(utf8data); n++ )
- {
- const StringConversionData& d = utf8data[n];
- DoTestConversion(d.str, d.wcs, conv);
- }
-}
-
-#endif // wxUSE_WCHAR_T
-
void StringTestCase::Extraction()
{
wxString rest;
- #define TEST_STARTS_WITH( prefix , correct_rest, result ) \
- CPPUNIT_ASSERT( \
- ( s.StartsWith( prefix, &rest ) == result ) && \
- ( ( result == false ) || ( wxStrcmp( correct_rest , rest ) == 0 ) ) \
- )
+ #define TEST_STARTS_WITH(prefix, correct_rest, result) \
+ CPPUNIT_ASSERT_EQUAL(result, s.StartsWith(prefix, &rest)); \
+ if ( result ) \
+ CPPUNIT_ASSERT_EQUAL(wxString(correct_rest), rest)
TEST_STARTS_WITH( _T("Hello"), _T(", world!"), true );
TEST_STARTS_WITH( _T("Hello, "), _T("world!"), true );
TEST_STARTS_WITH( _T("Hi"), _T(""), false );
#undef TEST_STARTS_WITH
-}
-void StringTestCase::Find()
-{
- #define TEST_FIND( str , start , result ) \
- CPPUNIT_ASSERT( wxString(str).find(_T("ell"), start) == result );
-
- TEST_FIND( _T("Well, hello world"), 0, 1 );
- TEST_FIND( _T("Well, hello world"), 6, 7 );
- TEST_FIND( _T("Well, hello world"), 9, wxString::npos );
-
- #undef TEST_FIND
+ #define TEST_ENDS_WITH(suffix, correct_rest, result) \
+ CPPUNIT_ASSERT_EQUAL(result, s.EndsWith(suffix, &rest)); \
+ if ( result ) \
+ CPPUNIT_ASSERT_EQUAL(wxString(correct_rest), rest)
+
+ TEST_ENDS_WITH( _T(""), _T("Hello, world!"), true );
+ TEST_ENDS_WITH( _T("!"), _T("Hello, world"), true );
+ TEST_ENDS_WITH( _T(", world!"), _T("Hello"), true );
+ TEST_ENDS_WITH( _T("ello, world!"), _T("H"), true );
+ TEST_ENDS_WITH( _T("Hello, world!"), _T(""), true );
+ TEST_ENDS_WITH( _T("very long string"), _T(""), false );
+ TEST_ENDS_WITH( _T("?"), _T(""), false );
+ TEST_ENDS_WITH( _T("Hello, world"), _T(""), false );
+ TEST_ENDS_WITH( _T("Gello, world!"), _T(""), false );
+
+ #undef TEST_ENDS_WITH
}
-void StringTestCase::SingleTokenizerTest( wxChar *str, wxChar *delims, size_t count , wxStringTokenizerMode mode )
+void StringTestCase::Trim()
{
- wxStringTokenizer tkz( str, delims, mode);
- CPPUNIT_ASSERT( tkz.CountTokens() == count );
+ #define TEST_TRIM( str , dir , result ) \
+ CPPUNIT_ASSERT( wxString(str).Trim(dir) == result )
- wxChar *buf, *s = NULL, *last;
+ TEST_TRIM( _T(" Test "), true, _T(" Test") );
+ TEST_TRIM( _T(" "), true, _T("") );
+ TEST_TRIM( _T(" "), true, _T("") );
+ TEST_TRIM( _T(""), true, _T("") );
- if ( tkz.GetMode() == wxTOKEN_STRTOK )
- {
- buf = new wxChar[wxStrlen(str) + 1];
- wxStrcpy(buf, str);
- s = wxStrtok(buf, delims, &last);
- }
- else
- {
- buf = NULL;
- }
-
- size_t count2 = 0;
- while ( tkz.HasMoreTokens() )
- {
- wxString token = tkz.GetNextToken();
- if ( buf )
- {
- CPPUNIT_ASSERT( token == s );
- s = wxStrtok(NULL, delims, &last);
- }
- count2++;
- }
+ TEST_TRIM( _T(" Test "), false, _T("Test ") );
+ TEST_TRIM( _T(" "), false, _T("") );
+ TEST_TRIM( _T(" "), false, _T("") );
+ TEST_TRIM( _T(""), false, _T("") );
- CPPUNIT_ASSERT( count2 == count );
- if ( buf )
- {
- delete [] buf;
- }
-}
-
-void StringTestCase::Tokenizer()
-{
- SingleTokenizerTest( _T(""), _T(" "), 0, wxTOKEN_DEFAULT );
- SingleTokenizerTest( _T("Hello, world"), _T(" "), 2, wxTOKEN_DEFAULT );
- SingleTokenizerTest( _T("Hello, world "), _T(" "), 2, wxTOKEN_DEFAULT );
- SingleTokenizerTest( _T("Hello, world"), _T(","), 2, wxTOKEN_DEFAULT );
- SingleTokenizerTest( _T("Hello, world!"), _T(",!"), 2, wxTOKEN_DEFAULT );
- SingleTokenizerTest( _T("Hello,, world!"), _T(",!"), 3, wxTOKEN_DEFAULT );
- SingleTokenizerTest( _T("Hello, world!"), _T(",!"), 3, wxTOKEN_RET_EMPTY_ALL );
- SingleTokenizerTest( _T("username:password:uid:gid:gecos:home:shell"), _T(":"), 7, wxTOKEN_DEFAULT );
- SingleTokenizerTest( _T("1 \t3\t4 6 "), wxDEFAULT_DELIMITERS, 4, wxTOKEN_DEFAULT );
- SingleTokenizerTest( _T("1 \t3\t4 6 "), wxDEFAULT_DELIMITERS, 6, wxTOKEN_RET_EMPTY );
- SingleTokenizerTest( _T("1 \t3\t4 6 "), wxDEFAULT_DELIMITERS, 9, wxTOKEN_RET_EMPTY_ALL );
- SingleTokenizerTest( _T("01/02/99"), _T("/-"), 3, wxTOKEN_DEFAULT );
- SingleTokenizerTest( _T("01-02/99"), _T("/-"), 3, wxTOKEN_RET_DELIMS );
+ #undef TEST_TRIM
}
-// call this with the string to tokenize, delimeters to use and the expected
-// positions (i.e. results of GetPosition()) after each GetNextToken() call,
-// terminate positions with 0
-static void DoTokenizerGetPosition(const wxChar *s,
- const wxChar *delims, int pos, ...)
+void StringTestCase::Find()
{
- wxStringTokenizer tkz(s, delims);
-
- CPPUNIT_ASSERT( tkz.GetPosition() == 0 );
-
- va_list ap;
- va_start(ap, pos);
-
- for ( ;; )
- {
- if ( !pos )
- {
- CPPUNIT_ASSERT( !tkz.HasMoreTokens() );
- break;
- }
-
- tkz.GetNextToken();
-
- CPPUNIT_ASSERT( tkz.GetPosition() == (size_t)pos );
-
- pos = va_arg(ap, int);
- }
+ #define TEST_FIND( str , start , result ) \
+ CPPUNIT_ASSERT( wxString(str).find(_T("ell"), start) == result );
- va_end(ap);
-}
+ TEST_FIND( _T("Well, hello world"), 0, 1 );
+ TEST_FIND( _T("Well, hello world"), 6, 7 );
+ TEST_FIND( _T("Well, hello world"), 9, wxString::npos );
-void StringTestCase::TokenizerGetPosition()
-{
- DoTokenizerGetPosition(_T("foo"), _T("_"), 3, 0);
- DoTokenizerGetPosition(_T("foo_bar"), _T("_"), 4, 7, 0);
- DoTokenizerGetPosition(_T("foo_bar_"), _T("_"), 4, 8, 0);
+ #undef TEST_FIND
}
void StringTestCase::Replace()
if ( locRu.IsOk() )
{
// try upper casing 8bit strings
- wxString sUpper("\xdf"),
- sLower("\xff");
+ const wchar_t capital_ya[] = { 0x42f, 0 },
+ small_ya[] = { 0x44f, 0 };
+
+ wxString sUpper(wxConvLibc.cWC2MB(capital_ya)),
+ sLower(wxConvLibc.cWC2MB(small_ya));
CPPUNIT_ASSERT( sUpper.Lower() == sLower );
CPPUNIT_ASSERT( sLower.Upper() == sUpper );
CPPUNIT_CNCNEQ_ASSERT( s1, neq3 );
}
+void StringTestCase::Contains()
+{
+ static const struct ContainsData
+ {
+ const wxChar *hay;
+ const wxChar *needle;
+ bool contains;
+ } containsData[] =
+ {
+ { _T(""), _T(""), true },
+ { _T(""), _T("foo"), false },
+ { _T("foo"), _T(""), true },
+ { _T("foo"), _T("f"), true },
+ { _T("foo"), _T("o"), true },
+ { _T("foo"), _T("oo"), true },
+ { _T("foo"), _T("ooo"), false },
+ { _T("foo"), _T("oooo"), false },
+ { _T("foo"), _T("fooo"), false },
+ };
+
+ for ( size_t n = 0; n < WXSIZEOF(containsData); n++ )
+ {
+ const ContainsData& cd = containsData[n];
+ CPPUNIT_ASSERT_EQUAL( cd.contains, wxString(cd.hay).Contains(cd.needle) );
+ }
+}
+
+// flags used in ToLongData.flags
+enum
+{
+ Number_Ok = 0,
+ Number_Invalid = 1,
+ Number_Unsigned = 2, // if not specified, works for signed conversion
+ Number_Signed = 4, // if not specified, works for unsigned
+ Number_LongLong = 8, // only for long long tests
+ Number_Long = 16, // only for long tests
+};
+
+static const struct ToLongData
+{
+ const wxChar *str;
+#ifdef wxLongLong_t
+ wxLongLong_t value;
+#else
+ long value;
+#endif // wxLongLong_t
+ int flags;
+
+ long LValue() const { return value; }
+ unsigned long ULValue() const { return value; }
+#ifdef wxLongLong_t
+ wxLongLong_t LLValue() const { return value; }
+ wxULongLong_t ULLValue() const { return (wxULongLong_t)value; }
+#endif // wxLongLong_t
+
+ bool IsOk() const { return !(flags & Number_Invalid); }
+} longData[] =
+{
+ { _T("1"), 1, Number_Ok },
+ { _T("0"), 0, Number_Ok },
+ { _T("a"), 0, Number_Invalid },
+ { _T("12345"), 12345, Number_Ok },
+ { _T("--1"), 0, Number_Invalid },
+
+ { _T("-1"), -1, Number_Signed | Number_Long },
+ // this is surprizing but consistent with strtoul() behaviour
+ { _T("-1"), ULONG_MAX, Number_Unsigned | Number_Long },
+
+ // this must overflow, even with 64 bit long
+ { _T("922337203685477580711"), 0, Number_Invalid },
+
+#ifdef wxLongLong_t
+ { _T("2147483648"), wxLL(2147483648), Number_LongLong },
+ { _T("-2147483648"), wxLL(-2147483648), Number_LongLong | Number_Signed },
+ { _T("9223372036854775808"), wxULL(9223372036854775808), Number_LongLong |
+ Number_Unsigned },
+#endif // wxLongLong_t
+};
+
+void StringTestCase::ToLong()
+{
+ long l;
+ for ( size_t n = 0; n < WXSIZEOF(longData); n++ )
+ {
+ const ToLongData& ld = longData[n];
+
+ if ( ld.flags & (Number_LongLong | Number_Unsigned) )
+ continue;
+
+ CPPUNIT_ASSERT_EQUAL( ld.IsOk(), wxString(ld.str).ToLong(&l) );
+ if ( ld.IsOk() )
+ CPPUNIT_ASSERT_EQUAL( ld.LValue(), l );
+ }
+}
+
+void StringTestCase::ToULong()
+{
+ unsigned long ul;
+ for ( size_t n = 0; n < WXSIZEOF(longData); n++ )
+ {
+ const ToLongData& ld = longData[n];
+
+ if ( ld.flags & (Number_LongLong | Number_Signed) )
+ continue;
+
+ CPPUNIT_ASSERT_EQUAL( ld.IsOk(), wxString(ld.str).ToULong(&ul) );
+ if ( ld.IsOk() )
+ CPPUNIT_ASSERT_EQUAL( ld.ULValue(), ul );
+ }
+}
+
+#ifdef wxLongLong_t
+
+void StringTestCase::ToLongLong()
+{
+ wxLongLong_t l;
+ for ( size_t n = 0; n < WXSIZEOF(longData); n++ )
+ {
+ const ToLongData& ld = longData[n];
+
+ if ( ld.flags & (Number_Long | Number_Unsigned) )
+ continue;
+
+ CPPUNIT_ASSERT_EQUAL( ld.IsOk(), wxString(ld.str).ToLongLong(&l) );
+ if ( ld.IsOk() )
+ CPPUNIT_ASSERT_EQUAL( ld.LLValue(), l );
+ }
+}
+
+void StringTestCase::ToULongLong()
+{
+ wxULongLong_t ul;
+ for ( size_t n = 0; n < WXSIZEOF(longData); n++ )
+ {
+ const ToLongData& ld = longData[n];
+
+ if ( ld.flags & (Number_Long | Number_Signed) )
+ continue;
+
+ CPPUNIT_ASSERT_EQUAL( ld.IsOk(), wxString(ld.str).ToULongLong(&ul) );
+ if ( ld.IsOk() )
+ CPPUNIT_ASSERT_EQUAL( ld.ULLValue(), ul );
+ }
+}
+
+#endif // wxLongLong_t
+
+void StringTestCase::ToDouble()
+{
+ double d;
+ static const struct ToDoubleData
+ {
+ const wxChar *str;
+ double value;
+ bool ok;
+ } doubleData[] =
+ {
+ { _T("1"), 1, true },
+ { _T("1.23"), 1.23, true },
+ { _T(".1"), .1, true },
+ { _T("1."), 1, true },
+ { _T("1.."), 0, false },
+ { _T("0"), 0, true },
+ { _T("a"), 0, false },
+ { _T("12345"), 12345, true },
+ { _T("-1"), -1, true },
+ { _T("--1"), 0, false },
+ };
+
+ // we need to use decimal point, not comma or whatever is its value for the
+ // current locale
+ wxSetlocale(LC_ALL, _T("C"));
+
+ size_t n;
+ for ( n = 0; n < WXSIZEOF(doubleData); n++ )
+ {
+ const ToDoubleData& ld = doubleData[n];
+ CPPUNIT_ASSERT_EQUAL( ld.ok, wxString(ld.str).ToDouble(&d) );
+ if ( ld.ok )
+ CPPUNIT_ASSERT_EQUAL( ld.value, d );
+ }
+}
+
+void StringTestCase::WriteBuf()
+{
+ wxString s;
+ wxStrcpy(wxStringBuffer(s, 10), _T("foo"));
+
+ CPPUNIT_ASSERT_EQUAL(_T('f'), s[0u]);
+ CPPUNIT_ASSERT_EQUAL(_T('o'), s[1]);
+ CPPUNIT_ASSERT_EQUAL(_T('o'), s[2]);
+ CPPUNIT_ASSERT_EQUAL(3u, s.length());
+
+ {
+ wxChar *p = s.GetWriteBuf(10);
+ wxStrcpy(p, _T("barrbaz"));
+ s.UngetWriteBuf(4);
+
+ CPPUNIT_ASSERT_EQUAL(_T('b'), s[0u]);
+ CPPUNIT_ASSERT_EQUAL(_T('a'), s[1]);
+ CPPUNIT_ASSERT_EQUAL(_T('r'), s[2]);
+ CPPUNIT_ASSERT_EQUAL(_T('r'), s[3]);
+ CPPUNIT_ASSERT_EQUAL(4u, s.length());
+
+ CPPUNIT_ASSERT_EQUAL( 0, wxStrcmp(_T("barr"), s) );
+ }
+}
+
projects / wxWidgets.git / blobdiff