tests/strings/vsnprintf.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        tests/strings/vsnprintf.cpp
   3 // Purpose:     wxVsnprintf unit test
   4 // Author:      Francesco Montorsi
   5 //              (part of this file was taken from CMP.c of TRIO package
   6 //               written by Bjorn Reese and Daniel Stenberg)
   7 // Created:     2006-04-01
   8 // Copyright:   (c) 2006 Francesco Montorsi, Bjorn Reese and Daniel Stenberg
   9 ///////////////////////////////////////////////////////////////////////////////
  10
  11 // ----------------------------------------------------------------------------
  12 // headers
  13 // ----------------------------------------------------------------------------
  14
  15 #include "testprec.h"
  16
  17 #ifdef __BORLANDC__
  18     #pragma hdrstop
  19 #endif
  20
  21 #include "wx/crt.h"
  22
  23 #if wxUSE_WXVSNPRINTF
  24
  25 #ifndef WX_PRECOMP
  26     #include "wx/wx.h"
  27     #include "wx/wxchar.h"
  28 #endif // WX_PRECOMP
  29
  30
  31 // NOTE: for more info about the specification of wxVsnprintf() behaviour you can
  32 //       refer to the following page of the GNU libc manual:
  33 //             http://www.gnu.org/software/libc/manual/html_node/Formatted-Output.html
  34
  35
  36 // ----------------------------------------------------------------------------
  37 // global utilities for testing
  38 // ----------------------------------------------------------------------------
  39
  40 #define MAX_TEST_LEN        1024
  41
  42 // temporary buffers
  43 static wxChar buf[MAX_TEST_LEN];
  44 int r;
  45
  46 // these macros makes it possible to write all tests without repeating a lot
  47 // of times the wxT() macro
  48 // NOTE: you should use expected strings with these macros which do not exceed
  49 //       MAX_TEST_LEN as these macro do check if the return value is == (int)wxStrlen(buf)
  50
  51 #define ASSERT_STR_EQUAL( a, b ) \
  52     CPPUNIT_ASSERT_EQUAL( wxString(a), wxString(b) );
  53
  54 #define CMP6(expected, fmt, y, z, w, t)                    \
  55     r=wxSnprintf(buf, MAX_TEST_LEN, wxT(fmt), y, z, w, t); \
  56     CPPUNIT_ASSERT_EQUAL( r, wxStrlen(buf) );          \
  57     ASSERT_STR_EQUAL( wxT(expected), buf );
  58
  59 #define CMP5(expected, fmt, y, z, w)                    \
  60     r=wxSnprintf(buf, MAX_TEST_LEN, wxT(fmt), y, z, w); \
  61     CPPUNIT_ASSERT_EQUAL( r, wxStrlen(buf) );          \
  62     ASSERT_STR_EQUAL( wxT(expected), buf );
  63
  64 #define CMP4(expected, fmt, y, z)                     \
  65     r=wxSnprintf(buf, MAX_TEST_LEN, wxT(fmt), y, z);  \
  66     CPPUNIT_ASSERT_EQUAL( r, wxStrlen(buf) );          \
  67     ASSERT_STR_EQUAL( wxT(expected), buf );
  68
  69 #define CMP3(expected, fmt, y)                        \
  70     r=wxSnprintf(buf, MAX_TEST_LEN, wxT(fmt), y);     \
  71     CPPUNIT_ASSERT_EQUAL( r, wxStrlen(buf) );          \
  72     ASSERT_STR_EQUAL( wxT(expected), buf );
  73
  74 #define CMP3i(expected, fmt, y)                        \
  75     r=wxSnprintf(buf, MAX_TEST_LEN, wxT(fmt), y);     \
  76     CPPUNIT_ASSERT_EQUAL( r, wxStrlen(buf) );          \
  77     WX_ASSERT_MESSAGE( ("Expected \"%s\", got \"%s\"", expected, buf), \
  78                        wxStricmp(expected, buf) == 0 );
  79
  80 #define CMP2(expected, fmt)                           \
  81     r=wxSnprintf(buf, MAX_TEST_LEN, wxT(fmt));        \
  82     CPPUNIT_ASSERT_EQUAL( r, wxStrlen(buf) );          \
  83     ASSERT_STR_EQUAL( wxT(expected), buf );
  84
  85 // NOTE: this macro is used also with too-small buffers (see Miscellaneous())
  86 //       test function, thus the return value can be > size and thus we
  87 //       cannot check if r == (int)wxStrlen(buf)
  88 #define CMPTOSIZE(buffer, size, failuremsg, expected, fmt, x, y, z, w)  \
  89     r=wxSnprintf(buffer, size, wxT(fmt), x, y, z, w);                   \
  90     CPPUNIT_ASSERT( r > 0 );                                            \
  91     CPPUNIT_ASSERT_EQUAL_MESSAGE(                                       \
  92         failuremsg,                                                     \
  93         wxString(wxT(expected)).Left(size - 1),                         \
  94         wxString(buffer))
  95
  96 // this is the same as wxSnprintf() but it passes the format string to
  97 // wxVsnprintf() without using WX_ATTRIBUTE_PRINTF and thus suppresses the gcc
  98 // checks (and resulting warnings) for the format string
  99 //
 100 // use with extreme care and only when you're really sure the warnings must be
 101 // suppressed!
 102 template<typename T>
 103 static int
 104 wxUnsafeSnprintf(T *buf, size_t len, const wxChar *fmt, ...)
 105 {
 106     va_list args;
 107     va_start(args, fmt);
 108
 109     int rc = wxVsnprintf(buf, len, fmt, args);
 110
 111     va_end(args);
 112
 113     return rc;
 114 }
 115
 116 // ----------------------------------------------------------------------------
 117 // test class
 118 // ----------------------------------------------------------------------------
 119
 120 class VsnprintfTestCase : public CppUnit::TestCase
 121 {
 122 public:
 123     VsnprintfTestCase() {}
 124
 125     virtual void setUp();
 126
 127 private:
 128     CPPUNIT_TEST_SUITE( VsnprintfTestCase );
 129         CPPUNIT_TEST( C );
 130         CPPUNIT_TEST( D );
 131         CPPUNIT_TEST( X );
 132         CPPUNIT_TEST( O );
 133         CPPUNIT_TEST( P );
 134         CPPUNIT_TEST( N );
 135         CPPUNIT_TEST( E );
 136         CPPUNIT_TEST( F );
 137         CPPUNIT_TEST( G );
 138         CPPUNIT_TEST( S );
 139         CPPUNIT_TEST( Asterisk );
 140         CPPUNIT_TEST( Percent );
 141 #ifdef wxLongLong_t
 142         CPPUNIT_TEST( LongLong );
 143 #endif
 144
 145         CPPUNIT_TEST( BigToSmallBuffer );
 146         CPPUNIT_TEST( WrongFormatStrings );
 147         CPPUNIT_TEST( Miscellaneous );
 148         CPPUNIT_TEST( GlibcMisc1 );
 149         CPPUNIT_TEST( GlibcMisc2 );
 150     CPPUNIT_TEST_SUITE_END();
 151
 152     void C();
 153     void D();
 154     void X();
 155     void O();
 156     void P();
 157     void N();
 158     void E();
 159     void F();
 160     void G();
 161     void S();
 162     void Asterisk();
 163     void Percent();
 164 #ifdef wxLongLong_t
 165     void LongLong();
 166 #endif
 167     void Unicode();
 168
 169     template<typename T>
 170         void DoBigToSmallBuffer(T *buffer, int size);
 171     void BigToSmallBuffer();
 172
 173     void WrongFormatStrings();
 174
 175     // compares the expectedString and the result of wxVsnprintf() char by char
 176     // for all its lenght (not only for first expectedLen chars) and also
 177     // checks the return value
 178     void DoMisc(int expectedLen, const wxString& expectedString,
 179                 size_t max, const wxChar *format, ...);
 180     void Miscellaneous();
 181
 182     void GlibcMisc1();
 183     void GlibcMisc2();
 184
 185     DECLARE_NO_COPY_CLASS(VsnprintfTestCase)
 186 };
 187
 188 // register in the unnamed registry so that these tests are run by default
 189 CPPUNIT_TEST_SUITE_REGISTRATION( VsnprintfTestCase );
 190
 191 // also include in its own registry so that these tests can be run alone
 192 CPPUNIT_TEST_SUITE_NAMED_REGISTRATION( VsnprintfTestCase, "VsnprintfTestCase" );
 193
 194 void VsnprintfTestCase::setUp()
 195 {
 196     // this call is required to avoid check failures when running on machines
 197     // with a locale where the decimal point is not '.'
 198     wxSetlocale(LC_ALL, "C");
 199 }
 200
 201 void VsnprintfTestCase::C()
 202 {
 203     CMP5("hi!", "%c%c%c", wxT('h'), wxT('i'), wxT('!'));
 204
 205     // NOTE:
 206     // the NULL characters _can_ be passed to %c to e.g. create strings
 207     // with embedded NULs (because strings are not always supposed to be
 208     // NUL-terminated).
 209
 210     DoMisc(14, wxT("Hello \0 World!"), 16, wxT("Hello %c World!"), wxT('\0'));
 211 }
 212
 213 void VsnprintfTestCase::D()
 214 {
 215     CMP3("+123456", "%+d", 123456);
 216     CMP3("-123456", "%d", -123456);
 217     CMP3(" 123456", "% d", 123456);
 218     CMP3("    123456", "%10d", 123456);
 219     CMP3("0000123456", "%010d", 123456);
 220     CMP3("-123456   ", "%-10d", -123456);
 221 }
 222
 223 void VsnprintfTestCase::X()
 224 {
 225     CMP3("ABCD", "%X", 0xABCD);
 226     CMP3("0XABCD", "%#X", 0xABCD);
 227     CMP3("0xabcd", "%#x", 0xABCD);
 228 }
 229
 230 void VsnprintfTestCase::O()
 231 {
 232     CMP3("1234567", "%o", 01234567);
 233     CMP3("01234567", "%#o", 01234567);
 234 }
 235
 236 void VsnprintfTestCase::P()
 237 {
 238     // The exact format used for "%p" is not specified by the standard and so
 239     // varies among different platforms, so we need to expect different results
 240     // here (remember that while we test our own wxPrintf() code here, it uses
 241     // the system sprintf() for actual formatting so the results are still
 242     // different under different systems).
 243
 244 #ifdef wxUSING_VC_CRT_IO
 245     // MSVC always prints pointers as %8X on 32 bit systems and as %16X on 64
 246     // bit systems.
 247     #if SIZEOF_VOID_P == 4
 248         CMP3i("00ABCDEF", "%p", (void*)0xABCDEF);
 249         CMP3("00000000", "%p", (void*)NULL);
 250     #elif SIZEOF_VOID_P == 8
 251         CMP3i("0000ABCDEFABCDEF", "%p", (void*)0xABCDEFABCDEF);
 252         CMP3("0000000000000000", "%p", (void*)NULL);
 253     #endif
 254 #elif defined(__MINGW32__)
 255     // mingw32 uses MSVC CRT in old versions but is own implementation now
 256     // which is somewhere in the middle as it uses %8x, so to catch both cases
 257     // we use case-insensitive comparison here.
 258     CMP3("0xabcdef", "%p", (void*)0xABCDEF);
 259     CMP3("0", "%p", (void*)NULL);
 260 #elif defined(__GNUG__)
 261     // glibc prints pointers as %#x except for NULL pointers which are printed
 262     // as '(nil)'.
 263     CMP3("0xabcdef", "%p", (void*)0xABCDEF);
 264     CMP3("(nil)", "%p", (void*)NULL);
 265 #endif
 266 }
 267
 268 void VsnprintfTestCase::N()
 269 {
 270     int nchar;
 271
 272     wxSnprintf(buf, MAX_TEST_LEN, wxT("%d %s%n\n"), 3, wxT("bears"), &nchar);
 273     CPPUNIT_ASSERT_EQUAL( 7, nchar );
 274 }
 275
 276 void VsnprintfTestCase::E()
 277 {
 278     // NB: there are no standards about the minimum exponent width
 279     //     (and the width of the %e conversion specifier refers to the
 280     //      mantissa, not to the exponent).
 281     //     Since newer MSVC versions use 3 digits as minimum exponent
 282     //     width while GNU libc uses 2 digits as minimum width, here we
 283     //     workaround this problem using for the exponent values with at
 284     //     least three digits.
 285     //     Some examples:
 286     //       printf("%e",2.342E+02);
 287     //     -> under MSVC7.1 prints:      2.342000e+002
 288     //     -> under GNU libc 2.4 prints: 2.342000e+02
 289     CMP3("2.342000e+112", "%e",2.342E+112);
 290     CMP3("-2.3420e-112", "%10.4e",-2.342E-112);
 291     CMP3("-2.3420e-112", "%11.4e",-2.342E-112);
 292     CMP3("   -2.3420e-112", "%15.4e",-2.342E-112);
 293
 294     CMP3("-0.02342", "%G",-2.342E-02);
 295     CMP3("3.1415E-116", "%G",3.1415e-116);
 296     CMP3("0003.141500e+103", "%016e", 3141.5e100);
 297     CMP3("   3.141500e+103", "%16e", 3141.5e100);
 298     CMP3("3.141500e+103   ", "%-16e", 3141.5e100);
 299     CMP3("3.142e+103", "%010.3e", 3141.5e100);
 300 }
 301
 302 void VsnprintfTestCase::F()
 303 {
 304     CMP3("3.300000", "%5f", 3.3);
 305     CMP3("3.000000", "%5f", 3.0);
 306     CMP3("0.000100", "%5f", .999999E-4);
 307     CMP3("0.000990", "%5f", .99E-3);
 308     CMP3("3333.000000", "%5f", 3333.0);
 309 }
 310
 311 void VsnprintfTestCase::G()
 312 {
 313     // NOTE: the same about E() testcase applies here...
 314
 315     CMP3("  3.3", "%5g", 3.3);
 316     CMP3("    3", "%5g", 3.0);
 317     CMP3("9.99999e-115", "%5g", .999999E-114);
 318     CMP3("0.00099", "%5g", .99E-3);
 319     CMP3(" 3333", "%5g", 3333.0);
 320     CMP3(" 0.01", "%5g", 0.01);
 321
 322     CMP3("    3", "%5.g", 3.3);
 323     CMP3("    3", "%5.g", 3.0);
 324     CMP3("1e-114", "%5.g", .999999E-114);
 325     CMP3("0.0001", "%5.g", 1.0E-4);
 326     CMP3("0.001", "%5.g", .99E-3);
 327     CMP3("3e+103", "%5.g", 3333.0E100);
 328     CMP3(" 0.01", "%5.g", 0.01);
 329
 330     CMP3("  3.3", "%5.2g", 3.3);
 331     CMP3("    3", "%5.2g", 3.0);
 332     CMP3("1e-114", "%5.2g", .999999E-114);
 333     CMP3("0.00099", "%5.2g", .99E-3);
 334     CMP3("3.3e+103", "%5.2g", 3333.0E100);
 335     CMP3(" 0.01", "%5.2g", 0.01);
 336 }
 337
 338 void VsnprintfTestCase::S()
 339 {
 340     CMP3("  abc", "%5s", wxT("abc"));
 341     CMP3("    a", "%5s", wxT("a"));
 342     CMP3("abcdefghi", "%5s", wxT("abcdefghi"));
 343     CMP3("abc  ", "%-5s", wxT("abc"));
 344     CMP3("abcdefghi", "%-5s", wxT("abcdefghi"));
 345
 346     CMP3("abcde", "%.5s", wxT("abcdefghi"));
 347
 348     // do the same tests but with Unicode characters:
 349 #if wxUSE_UNICODE
 350
 351     // Unicode code points from U+03B1 to U+03B9 are the greek letters alpha-iota;
 352     // UTF8 encoding of such code points is 0xCEB1 to 0xCEB9
 353
 354 #define ALPHA       "\xCE\xB1"
 355         // alpha
 356 #define ABC         "\xCE\xB1\xCE\xB2\xCE\xB3"
 357         // alpha+beta+gamma
 358 #define ABCDE       "\xCE\xB1\xCE\xB2\xCE\xB3\xCE\xB4\xCE\xB5"
 359         // alpha+beta+gamma+delta+epsilon
 360 #define ABCDEFGHI   "\xCE\xB1\xCE\xB2\xCE\xB3\xCE\xB4\xCE\xB5\xCE\xB6\xCE\xB7\xCE\xB8\xCE\xB9"
 361         // alpha+beta+gamma+delta+epsilon+zeta+eta+theta+iota
 362
 363     // the 'expected' and 'arg' parameters of this macro are supposed to be
 364     // UTF-8 strings
 365 #define CMP3_UTF8(expected, fmt, arg)                                         \
 366     CPPUNIT_ASSERT_EQUAL                                                      \
 367     (                                                                         \
 368         wxString::FromUTF8(expected).length(),                                \
 369         wxSnprintf(buf, MAX_TEST_LEN, fmt, wxString::FromUTF8(arg))           \
 370     );                                                                        \
 371     CPPUNIT_ASSERT_EQUAL                                                      \
 372     (                                                                         \
 373         wxString::FromUTF8(expected),                                         \
 374         buf                                                                   \
 375     )
 376
 377     CMP3_UTF8("  " ABC,     "%5s",  ABC);
 378     CMP3_UTF8("    " ALPHA, "%5s",  ALPHA);
 379     CMP3_UTF8(ABCDEFGHI,    "%5s",  ABCDEFGHI);
 380     CMP3_UTF8(ABC "  ",     "%-5s", ABC);
 381     CMP3_UTF8(ABCDEFGHI,    "%-5s", ABCDEFGHI);
 382     CMP3_UTF8(ABCDE,        "%.5s", ABCDEFGHI);
 383 #endif // wxUSE_UNICODE
 384
 385     // test a string which has a NULL character after "ab";
 386     // obviously it should be handled exactly like just as "ab"
 387     CMP3("   ab", "%5s", wxT("ab\0cdefghi"));
 388 }
 389
 390 void VsnprintfTestCase::Asterisk()
 391 {
 392     CMP5("       0.1", "%*.*f", 10, 1, 0.123);
 393     CMP5("    0.1230", "%*.*f", 10, 4, 0.123);
 394     CMP5("0.1", "%*.*f", 3, 1, 0.123);
 395
 396     CMP4("%0.002", "%%%.*f", 3, 0.0023456789);
 397
 398     CMP4("       a", "%*c", 8, 'a');
 399     CMP4("    four", "%*s", 8, "four");
 400     CMP6("    four   four", "%*s %*s", 8, "four", 6, "four");
 401 }
 402
 403 void VsnprintfTestCase::Percent()
 404 {
 405     // some tests without any argument passed through ...
 406     CMP2("%", "%%");
 407     CMP2("%%%", "%%%%%%");
 408
 409     CMP3("%  abc", "%%%5s", wxT("abc"));
 410     CMP3("%  abc%", "%%%5s%%", wxT("abc"));
 411
 412     // do not test odd number of '%' symbols as different implementations
 413     // of snprintf() give different outputs as this situation is not considered
 414     // by any standard (in fact, GCC will also warn you about a spurious % if
 415     // you write %%% as argument of some *printf function !)
 416     // Compare(wxT("%"), wxT("%%%"));
 417 }
 418
 419 #ifdef wxLongLong_t
 420 void VsnprintfTestCase::LongLong()
 421 {
 422     CMP3("123456789", "%lld", (wxLongLong_t)123456789);
 423     CMP3("-123456789", "%lld", (wxLongLong_t)-123456789);
 424
 425     CMP3("123456789", "%llu", (wxULongLong_t)123456789);
 426
 427 #ifdef __WINDOWS__
 428     CMP3("123456789", "%I64d", (wxLongLong_t)123456789);
 429     CMP3("123456789abcdef", "%I64x", wxLL(0x123456789abcdef));
 430 #endif
 431 }
 432 #endif
 433
 434 void VsnprintfTestCase::WrongFormatStrings()
 435 {
 436     // test how wxVsnprintf() behaves with wrong format string:
 437
 438 #if 0
 439     // NB: the next 2 tests currently return an error but it would be nice
 440     //     if they didn't (see ticket #9367)
 441
 442     // two positionals with the same index:
 443     r = wxSnprintf(buf, MAX_TEST_LEN, wxT("%1$s %1$s"), "hello");
 444     CPPUNIT_ASSERT(r != -1);
 445
 446     // three positionals with the same index mixed with other pos args:
 447     r = wxSnprintf(buf, MAX_TEST_LEN, wxT("%4$d %2$f %1$s %2$s %3$d"), "hello", "world", 3, 4);
 448     CPPUNIT_ASSERT(r != -1);
 449 #endif
 450
 451     // a missing positional arg should result in an assert
 452     WX_ASSERT_FAILS_WITH_ASSERT(
 453             wxSnprintf(buf, MAX_TEST_LEN, wxT("%1$d %3$d"), 1, 2, 3) );
 454
 455     // positional and non-positionals in the same format string:
 456     r = wxSnprintf(buf, MAX_TEST_LEN, wxT("%1$d %d %3$d"), 1, 2, 3);
 457     CPPUNIT_ASSERT_EQUAL(-1, r);
 458 }
 459
 460 // BigToSmallBuffer() test case helper:
 461 template<typename T>
 462 void VsnprintfTestCase::DoBigToSmallBuffer(T *buffer, int size)
 463 {
 464     // Remember that wx*printf could be mapped either to system
 465     // implementation or to wx implementation.
 466     // In the first case, when the output buffer is too small, the returned
 467     // value can be the number of characters required for the output buffer
 468     // (conforming to ISO C99; implemented in e.g. GNU libc >= 2.1), or
 469     // just a negative number, usually -1; (this is how e.g. MSVC's
 470     // *printf() behaves). Luckily, in all implementations, when the
 471     // output buffer is too small, it's nonetheless filled up to its max size.
 472     //
 473     // Note that in the second case (i.e. when we're using our own implementation),
 474     // wxVsnprintf() will return the number of characters written in the standard
 475     // output or
 476     //   -1         if there was an error in the format string
 477     //   maxSize+1  if the output buffer is too small
 478
 479     wxString errStr;
 480     errStr << "The size of the buffer was " << size;
 481     std::string errMsg(errStr.mb_str());
 482
 483     // test without positionals
 484     CMPTOSIZE(buffer, size, errMsg,
 485               "123456789012 - test - 123 -4.567",
 486               "%i%li - test - %d %.3f",
 487               123, (long int)456789012, 123, -4.567);
 488
 489 #if wxUSE_PRINTF_POS_PARAMS
 490     // test with positional
 491     CMPTOSIZE(buffer, size, errMsg,
 492               "-4.567 123 - test - 456789012 123",
 493               "%4$.3f %1$i - test - %2$li %3$d",
 494               123, (long int)456789012, 123, -4.567);
 495 #endif
 496
 497     // test unicode/ansi conversion specifiers
 498     //
 499     // NB: we use wxUnsafeSnprintf() as %hs and %hc are invalid in printf
 500     //     format and gcc would warn about this otherwise
 501
 502     r = wxUnsafeSnprintf(buffer, size,
 503                          wxT("unicode string/char: %ls/%lc -- ansi string/char: %hs/%hc"),
 504                          L"unicode", L'U', "ansi", 'A');
 505     wxString expected =
 506         wxString(wxT("unicode string/char: unicode/U -- ansi string/char: ansi/A")).Left(size - 1);
 507
 508     CPPUNIT_ASSERT( r != -1 );
 509     CPPUNIT_ASSERT_EQUAL(
 510         expected,
 511         wxString(buffer)
 512     );
 513 }
 514
 515 void VsnprintfTestCase::BigToSmallBuffer()
 516 {
 517     // VC6 can't compile this code
 518 #if !defined(__VISUALC__) || (__VISUALC__ >= 1310)
 519 #if wxUSE_UNICODE
 520     wchar_t bufw[1024], bufw2[16], bufw3[4], bufw4;
 521     DoBigToSmallBuffer(bufw, 1024);
 522     DoBigToSmallBuffer(bufw2, 16);
 523     DoBigToSmallBuffer(bufw3, 4);
 524     DoBigToSmallBuffer(&bufw4, 1);
 525 #endif // wxUSE_UNICODE
 526
 527     char bufa[1024], bufa2[16], bufa3[4], bufa4;
 528     DoBigToSmallBuffer(bufa, 1024);
 529     DoBigToSmallBuffer(bufa2, 16);
 530     DoBigToSmallBuffer(bufa3, 4);
 531     DoBigToSmallBuffer(&bufa4, 1);
 532 #endif // !VC6
 533 }
 534
 535 // Miscellaneous() test case helper:
 536 void VsnprintfTestCase::DoMisc(
 537         int expectedLen,
 538         const wxString& expectedString,
 539         size_t max,
 540         const wxChar *format, ...)
 541 {
 542     const size_t BUFSIZE = MAX_TEST_LEN - 1;
 543     size_t i;
 544     static int count = 0;
 545
 546     wxASSERT(max <= BUFSIZE);
 547
 548     for (i = 0; i < BUFSIZE; i++)
 549         buf[i] = '*';
 550     buf[BUFSIZE] = 0;
 551
 552     va_list ap;
 553     va_start(ap, format);
 554
 555     int n = wxVsnprintf(buf, max, format, ap);
 556
 557     va_end(ap);
 558
 559     // Prepare messages so that it is possible to see from the error which
 560     // test was running.
 561     wxString errStr, overflowStr;
 562     errStr << wxT("No.: ") << ++count << wxT(", expected: ") << expectedLen
 563            << wxT(" '") << expectedString << wxT("', result: ");
 564     overflowStr << errStr << wxT("buffer overflow");
 565     errStr << n << wxT(" '") << buf << wxT("'");
 566
 567     // turn them into std::strings
 568     std::string errMsg(errStr.mb_str());
 569     std::string overflowMsg(overflowStr.mb_str());
 570
 571     CPPUNIT_ASSERT_MESSAGE(errMsg,
 572             (expectedLen == -1 && size_t(n) >= max) || expectedLen == n);
 573
 574     CPPUNIT_ASSERT_MESSAGE(errMsg, expectedString == buf);
 575
 576     for (i = max; i < BUFSIZE; i++)
 577         CPPUNIT_ASSERT_MESSAGE(overflowMsg, buf[i] == '*');
 578 }
 579
 580 void VsnprintfTestCase::Miscellaneous()
 581 {
 582     // expectedLen, expectedString, max, format, ...
 583     DoMisc(5,  wxT("-1234"),   8, wxT("%d"), -1234);
 584     DoMisc(7,  wxT("1234567"), 8, wxT("%d"), 1234567);
 585     DoMisc(-1, wxT("1234567"), 8, wxT("%d"), 12345678);
 586     DoMisc(-1, wxT("-123456"), 8, wxT("%d"), -1234567890);
 587
 588     DoMisc(6,  wxT("123456"),  8, wxT("123456"));
 589     DoMisc(7,  wxT("1234567"), 8, wxT("1234567"));
 590     DoMisc(-1, wxT("1234567"), 8, wxT("12345678"));
 591
 592     DoMisc(6,  wxT("123450"),  8, wxT("12345%d"), 0);
 593     DoMisc(7,  wxT("1234560"), 8, wxT("123456%d"), 0);
 594     DoMisc(-1, wxT("1234567"), 8, wxT("1234567%d"), 0);
 595     DoMisc(-1, wxT("1234567"), 8, wxT("12345678%d"), 0);
 596
 597     DoMisc(6,  wxT("12%45%"),  8, wxT("12%%45%%"));
 598     DoMisc(7,  wxT("12%45%7"), 8, wxT("12%%45%%7"));
 599     DoMisc(-1, wxT("12%45%7"), 8, wxT("12%%45%%78"));
 600
 601     DoMisc(5,  wxT("%%%%%"),   6, wxT("%%%%%%%%%%"));
 602     DoMisc(6,  wxT("%%%%12"),  7, wxT("%%%%%%%%%d"), 12);
 603 }
 604
 605
 606 /* (C) Copyright C E Chew
 607 *
 608 * Feel free to copy, use and distribute this software provided:
 609 *
 610 *        1. you do not pretend that you wrote it
 611 *        2. you leave this copyright notice intact.
 612 */
 613
 614 void VsnprintfTestCase::GlibcMisc1()
 615 {
 616     CMP3("     ",    "%5.s", "xyz");
 617     CMP3("   33",    "%5.f", 33.3);
 618 #ifdef wxUSING_VC_CRT_IO
 619     // see the previous notes about the minimum width of mantissa:
 620     CMP3("  3e+008", "%8.e", 33.3e7);
 621     CMP3("  3E+008", "%8.E", 33.3e7);
 622     CMP3("3e+001",    "%.g",  33.3);
 623     CMP3("3E+001",    "%.G",  33.3);
 624 #else
 625     CMP3("   3e+08", "%8.e", 33.3e7);
 626     CMP3("   3E+08", "%8.E", 33.3e7);
 627     CMP3("3e+01",    "%.g",  33.3);
 628     CMP3("3E+01",    "%.G",  33.3);
 629 #endif
 630 }
 631
 632 void VsnprintfTestCase::GlibcMisc2()
 633 {
 634     int prec;
 635     wxString test_format;
 636
 637     prec = 0;
 638     CMP4("3", "%.*g", prec, 3.3);
 639
 640     prec = 0;
 641     CMP4("3", "%.*G", prec, 3.3);
 642
 643     prec = 0;
 644     CMP4("      3", "%7.*G", prec, 3.33);
 645
 646     prec = 3;
 647     CMP4(" 041", "%04.*o", prec, 33);
 648
 649     prec = 7;
 650     CMP4("  0000033", "%09.*u", prec, 33);
 651
 652     prec = 3;
 653     CMP4(" 021", "%04.*x", prec, 33);
 654
 655     prec = 3;
 656     CMP4(" 021", "%04.*X", prec, 33);
 657 }
 658
 659 #endif // wxUSE_WXVSNPRINTF
 660