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 // RCS-ID:      $Id$
   9 // Copyright:   (c) 2006 Francesco Montorsi, Bjorn Reese and Daniel Stenberg
  10 ///////////////////////////////////////////////////////////////////////////////
  11
  12 // ----------------------------------------------------------------------------
  13 // headers
  14 // ----------------------------------------------------------------------------
  15
  16 #include "testprec.h"
  17
  18 #ifdef __BORLANDC__
  19     #pragma hdrstop
  20 #endif
  21
  22 #include "wx/crt.h"
  23
  24 #if wxUSE_WXVSNPRINTF
  25
  26 #ifndef WX_PRECOMP
  27     #include "wx/wx.h"
  28     #include "wx/wxchar.h"
  29 #endif // WX_PRECOMP
  30
  31
  32 // NOTE: for more info about the specification of wxVsnprintf() behaviour you can
  33 //       refer to the following page of the GNU libc manual:
  34 //             http://www.gnu.org/software/libc/manual/html_node/Formatted-Output.html
  35
  36
  37 // ----------------------------------------------------------------------------
  38 // global utilities for testing
  39 // ----------------------------------------------------------------------------
  40
  41 #define MAX_TEST_LEN        1024
  42
  43 // temporary buffers
  44 static wxChar buf[MAX_TEST_LEN];
  45 int r;
  46
  47 // these macros makes it possible to write all tests without repeating a lot
  48 // of times the wxT() macro
  49 // NOTE: you should use expected strings with these macros which do not exceed
  50 //       MAX_TEST_LEN as these macro do check if the return value is == (int)wxStrlen(buf)
  51
  52 #define ASSERT_STR_EQUAL( a, b ) \
  53     CPPUNIT_ASSERT_EQUAL( wxString(a), wxString(b) );
  54
  55 #define CMP6(expected, fmt, y, z, w, t)                    \
  56     r=wxSnprintf(buf, MAX_TEST_LEN, wxT(fmt), y, z, w, t); \
  57     CPPUNIT_ASSERT_EQUAL( r, wxStrlen(buf) );          \
  58     ASSERT_STR_EQUAL( wxT(expected), buf );
  59
  60 #define CMP5(expected, fmt, y, z, w)                    \
  61     r=wxSnprintf(buf, MAX_TEST_LEN, wxT(fmt), y, z, w); \
  62     CPPUNIT_ASSERT_EQUAL( r, wxStrlen(buf) );          \
  63     ASSERT_STR_EQUAL( wxT(expected), buf );
  64
  65 #define CMP4(expected, fmt, y, z)                     \
  66     r=wxSnprintf(buf, MAX_TEST_LEN, wxT(fmt), y, z);  \
  67     CPPUNIT_ASSERT_EQUAL( r, wxStrlen(buf) );          \
  68     ASSERT_STR_EQUAL( wxT(expected), buf );
  69
  70 #define CMP3(expected, fmt, y)                        \
  71     r=wxSnprintf(buf, MAX_TEST_LEN, wxT(fmt), y);     \
  72     CPPUNIT_ASSERT_EQUAL( r, wxStrlen(buf) );          \
  73     ASSERT_STR_EQUAL( wxT(expected), buf );
  74
  75 #define CMP3i(expected, fmt, y)                        \
  76     r=wxSnprintf(buf, MAX_TEST_LEN, wxT(fmt), y);     \
  77     CPPUNIT_ASSERT_EQUAL( r, wxStrlen(buf) );          \
  78     WX_ASSERT_MESSAGE( ("Expected \"%s\", got \"%s\"", expected, buf), \
  79                        wxStricmp(expected, buf) == 0 );
  80
  81 #define CMP2(expected, fmt)                           \
  82     r=wxSnprintf(buf, MAX_TEST_LEN, wxT(fmt));        \
  83     CPPUNIT_ASSERT_EQUAL( r, wxStrlen(buf) );          \
  84     ASSERT_STR_EQUAL( wxT(expected), buf );
  85
  86 // NOTE: this macro is used also with too-small buffers (see Miscellaneous())
  87 //       test function, thus the return value can be > size and thus we
  88 //       cannot check if r == (int)wxStrlen(buf)
  89 #define CMPTOSIZE(buffer, size, failuremsg, expected, fmt, x, y, z, w)  \
  90     r=wxSnprintf(buffer, size, wxT(fmt), x, y, z, w);                   \
  91     CPPUNIT_ASSERT( r > 0 );                                            \
  92     CPPUNIT_ASSERT_EQUAL_MESSAGE(                                       \
  93         failuremsg,                                                     \
  94         wxString(wxT(expected)).Left(size - 1),                         \
  95         wxString(buffer))
  96
  97 // this is the same as wxSnprintf() but it passes the format string to
  98 // wxVsnprintf() without using WX_ATTRIBUTE_PRINTF and thus suppresses the gcc
  99 // checks (and resulting warnings) for the format string
 100 //
 101 // use with extreme care and only when you're really sure the warnings must be
 102 // suppressed!
 103 template<typename T>
 104 static int
 105 wxUnsafeSnprintf(T *buf, size_t len, const wxChar *fmt, ...)
 106 {
 107     va_list args;
 108     va_start(args, fmt);
 109
 110     int rc = wxVsnprintf(buf, len, fmt, args);
 111
 112     va_end(args);
 113
 114     return rc;
 115 }
 116
 117 // ----------------------------------------------------------------------------
 118 // test class
 119 // ----------------------------------------------------------------------------
 120
 121 class VsnprintfTestCase : public CppUnit::TestCase
 122 {
 123 public:
 124     VsnprintfTestCase() {}
 125
 126     virtual void setUp();
 127
 128 private:
 129     CPPUNIT_TEST_SUITE( VsnprintfTestCase );
 130         CPPUNIT_TEST( C );
 131         CPPUNIT_TEST( D );
 132         CPPUNIT_TEST( X );
 133         CPPUNIT_TEST( O );
 134         CPPUNIT_TEST( P );
 135         CPPUNIT_TEST( N );
 136         CPPUNIT_TEST( E );
 137         CPPUNIT_TEST( F );
 138         CPPUNIT_TEST( G );
 139         CPPUNIT_TEST( S );
 140         CPPUNIT_TEST( Asterisk );
 141         CPPUNIT_TEST( Percent );
 142 #ifdef wxLongLong_t
 143         CPPUNIT_TEST( LongLong );
 144 #endif
 145
 146         CPPUNIT_TEST( BigToSmallBuffer );
 147         CPPUNIT_TEST( WrongFormatStrings );
 148         CPPUNIT_TEST( Miscellaneous );
 149         CPPUNIT_TEST( GlibcMisc1 );
 150         CPPUNIT_TEST( GlibcMisc2 );
 151     CPPUNIT_TEST_SUITE_END();
 152
 153     void C();
 154     void D();
 155     void X();
 156     void O();
 157     void P();
 158     void N();
 159     void E();
 160     void F();
 161     void G();
 162     void S();
 163     void Asterisk();
 164     void Percent();
 165 #ifdef wxLongLong_t
 166     void LongLong();
 167 #endif
 168     void Unicode();
 169
 170     template<typename T>
 171         void DoBigToSmallBuffer(T *buffer, int size);
 172     void BigToSmallBuffer();
 173
 174     void WrongFormatStrings();
 175
 176     // compares the expectedString and the result of wxVsnprintf() char by char
 177     // for all its lenght (not only for first expectedLen chars) and also
 178     // checks the return value
 179     void DoMisc(int expectedLen, const wxString& expectedString,
 180                 size_t max, const wxChar *format, ...);
 181     void Miscellaneous();
 182
 183     void GlibcMisc1();
 184     void GlibcMisc2();
 185
 186     DECLARE_NO_COPY_CLASS(VsnprintfTestCase)
 187 };
 188
 189 // register in the unnamed registry so that these tests are run by default
 190 CPPUNIT_TEST_SUITE_REGISTRATION( VsnprintfTestCase );
 191
 192 // also include in its own registry so that these tests can be run alone
 193 CPPUNIT_TEST_SUITE_NAMED_REGISTRATION( VsnprintfTestCase, "VsnprintfTestCase" );
 194
 195 void VsnprintfTestCase::setUp()
 196 {
 197     // this call is required to avoid check failures when running on machines
 198     // with a locale where the decimal point is not '.'
 199     wxSetlocale(LC_ALL, "C");
 200 }
 201
 202 void VsnprintfTestCase::C()
 203 {
 204     CMP5("hi!", "%c%c%c", wxT('h'), wxT('i'), wxT('!'));
 205
 206     // NOTE:
 207     // the NULL characters _can_ be passed to %c to e.g. create strings
 208     // with embedded NULs (because strings are not always supposed to be
 209     // NUL-terminated).
 210
 211     DoMisc(14, wxT("Hello \0 World!"), 16, wxT("Hello %c World!"), wxT('\0'));
 212 }
 213
 214 void VsnprintfTestCase::D()
 215 {
 216     CMP3("+123456", "%+d", 123456);
 217     CMP3("-123456", "%d", -123456);
 218     CMP3(" 123456", "% d", 123456);
 219     CMP3("    123456", "%10d", 123456);
 220     CMP3("0000123456", "%010d", 123456);
 221     CMP3("-123456   ", "%-10d", -123456);
 222 }
 223
 224 void VsnprintfTestCase::X()
 225 {
 226     CMP3("ABCD", "%X", 0xABCD);
 227     CMP3("0XABCD", "%#X", 0xABCD);
 228     CMP3("0xabcd", "%#x", 0xABCD);
 229 }
 230
 231 void VsnprintfTestCase::O()
 232 {
 233     CMP3("1234567", "%o", 01234567);
 234     CMP3("01234567", "%#o", 01234567);
 235 }
 236
 237 void VsnprintfTestCase::P()
 238 {
 239     // The exact format used for "%p" is not specified by the standard and so
 240     // varies among different platforms, so we need to expect different results
 241     // here (remember that while we test our own wxPrintf() code here, it uses
 242     // the system sprintf() for actual formatting so the results are still
 243     // different under different systems).
 244
 245 #ifdef wxUSING_VC_CRT_IO
 246     // MSVC always prints pointers as %8X on 32 bit systems and as %16X on 64
 247     // bit systems.
 248     #if SIZEOF_VOID_P == 4
 249         CMP3i("00ABCDEF", "%p", (void*)0xABCDEF);
 250         CMP3("00000000", "%p", (void*)NULL);
 251     #elif SIZEOF_VOID_P == 8
 252         CMP3i("0000ABCDEFABCDEF", "%p", (void*)0xABCDEFABCDEF);
 253         CMP3("0000000000000000", "%p", (void*)NULL);
 254     #endif
 255 #elif defined(__MINGW32__)
 256     // mingw32 uses MSVC CRT in old versions but is own implementation now
 257     // which is somewhere in the middle as it uses %8x, so to catch both cases
 258     // we use case-insensitive comparison here.
 259     CMP3("0xabcdef", "%p", (void*)0xABCDEF);
 260     CMP3("0", "%p", (void*)NULL);
 261 #elif defined(__GNUG__)
 262     // glibc prints pointers as %#x except for NULL pointers which are printed
 263     // as '(nil)'.
 264     CMP3("0xabcdef", "%p", (void*)0xABCDEF);
 265     CMP3("(nil)", "%p", (void*)NULL);
 266 #endif
 267 }
 268
 269 void VsnprintfTestCase::N()
 270 {
 271     int nchar;
 272
 273     wxSnprintf(buf, MAX_TEST_LEN, wxT("%d %s%n\n"), 3, wxT("bears"), &nchar);
 274     CPPUNIT_ASSERT_EQUAL( 7, nchar );
 275 }
 276
 277 void VsnprintfTestCase::E()
 278 {
 279     // NB: there are no standards about the minimum exponent width
 280     //     (and the width of the %e conversion specifier refers to the
 281     //      mantissa, not to the exponent).
 282     //     Since newer MSVC versions use 3 digits as minimum exponent
 283     //     width while GNU libc uses 2 digits as minimum width, here we
 284     //     workaround this problem using for the exponent values with at
 285     //     least three digits.
 286     //     Some examples:
 287     //       printf("%e",2.342E+02);
 288     //     -> under MSVC7.1 prints:      2.342000e+002
 289     //     -> under GNU libc 2.4 prints: 2.342000e+02
 290     CMP3("2.342000e+112", "%e",2.342E+112);
 291     CMP3("-2.3420e-112", "%10.4e",-2.342E-112);
 292     CMP3("-2.3420e-112", "%11.4e",-2.342E-112);
 293     CMP3("   -2.3420e-112", "%15.4e",-2.342E-112);
 294
 295     CMP3("-0.02342", "%G",-2.342E-02);
 296     CMP3("3.1415E-116", "%G",3.1415e-116);
 297     CMP3("0003.141500e+103", "%016e", 3141.5e100);
 298     CMP3("   3.141500e+103", "%16e", 3141.5e100);
 299     CMP3("3.141500e+103   ", "%-16e", 3141.5e100);
 300     CMP3("3.142e+103", "%010.3e", 3141.5e100);
 301 }
 302
 303 void VsnprintfTestCase::F()
 304 {
 305     CMP3("3.300000", "%5f", 3.3);
 306     CMP3("3.000000", "%5f", 3.0);
 307     CMP3("0.000100", "%5f", .999999E-4);
 308     CMP3("0.000990", "%5f", .99E-3);
 309     CMP3("3333.000000", "%5f", 3333.0);
 310 }
 311
 312 void VsnprintfTestCase::G()
 313 {
 314     // NOTE: the same about E() testcase applies here...
 315
 316     CMP3("  3.3", "%5g", 3.3);
 317     CMP3("    3", "%5g", 3.0);
 318     CMP3("9.99999e-115", "%5g", .999999E-114);
 319     CMP3("0.00099", "%5g", .99E-3);
 320     CMP3(" 3333", "%5g", 3333.0);
 321     CMP3(" 0.01", "%5g", 0.01);
 322
 323     CMP3("    3", "%5.g", 3.3);
 324     CMP3("    3", "%5.g", 3.0);
 325     CMP3("1e-114", "%5.g", .999999E-114);
 326     CMP3("0.0001", "%5.g", 1.0E-4);
 327     CMP3("0.001", "%5.g", .99E-3);
 328     CMP3("3e+103", "%5.g", 3333.0E100);
 329     CMP3(" 0.01", "%5.g", 0.01);
 330
 331     CMP3("  3.3", "%5.2g", 3.3);
 332     CMP3("    3", "%5.2g", 3.0);
 333     CMP3("1e-114", "%5.2g", .999999E-114);
 334     CMP3("0.00099", "%5.2g", .99E-3);
 335     CMP3("3.3e+103", "%5.2g", 3333.0E100);
 336     CMP3(" 0.01", "%5.2g", 0.01);
 337 }
 338
 339 void VsnprintfTestCase::S()
 340 {
 341     CMP3("  abc", "%5s", wxT("abc"));
 342     CMP3("    a", "%5s", wxT("a"));
 343     CMP3("abcdefghi", "%5s", wxT("abcdefghi"));
 344     CMP3("abc  ", "%-5s", wxT("abc"));
 345     CMP3("abcdefghi", "%-5s", wxT("abcdefghi"));
 346
 347     CMP3("abcde", "%.5s", wxT("abcdefghi"));
 348
 349     // do the same tests but with Unicode characters:
 350 #if wxUSE_UNICODE
 351
 352     // Unicode code points from U+03B1 to U+03B9 are the greek letters alpha-iota;
 353     // UTF8 encoding of such code points is 0xCEB1 to 0xCEB9
 354
 355 #define ALPHA       "\xCE\xB1"
 356         // alpha
 357 #define ABC         "\xCE\xB1\xCE\xB2\xCE\xB3"
 358         // alpha+beta+gamma
 359 #define ABCDE       "\xCE\xB1\xCE\xB2\xCE\xB3\xCE\xB4\xCE\xB5"
 360         // alpha+beta+gamma+delta+epsilon
 361 #define ABCDEFGHI   "\xCE\xB1\xCE\xB2\xCE\xB3\xCE\xB4\xCE\xB5\xCE\xB6\xCE\xB7\xCE\xB8\xCE\xB9"
 362         // alpha+beta+gamma+delta+epsilon+zeta+eta+theta+iota
 363
 364     // the 'expected' and 'arg' parameters of this macro are supposed to be
 365     // UTF-8 strings
 366 #define CMP3_UTF8(expected, fmt, arg)                                         \
 367     CPPUNIT_ASSERT_EQUAL                                                      \
 368     (                                                                         \
 369         wxString::FromUTF8(expected).length(),                                \
 370         wxSnprintf(buf, MAX_TEST_LEN, fmt, wxString::FromUTF8(arg))           \
 371     );                                                                        \
 372     CPPUNIT_ASSERT_EQUAL                                                      \
 373     (                                                                         \
 374         wxString::FromUTF8(expected),                                         \
 375         buf                                                                   \
 376     )
 377
 378     CMP3_UTF8("  " ABC,     "%5s",  ABC);
 379     CMP3_UTF8("    " ALPHA, "%5s",  ALPHA);
 380     CMP3_UTF8(ABCDEFGHI,    "%5s",  ABCDEFGHI);
 381     CMP3_UTF8(ABC "  ",     "%-5s", ABC);
 382     CMP3_UTF8(ABCDEFGHI,    "%-5s", ABCDEFGHI);
 383     CMP3_UTF8(ABCDE,        "%.5s", ABCDEFGHI);
 384 #endif // wxUSE_UNICODE
 385
 386     // test a string which has a NULL character after "ab";
 387     // obviously it should be handled exactly like just as "ab"
 388     CMP3("   ab", "%5s", wxT("ab\0cdefghi"));
 389 }
 390
 391 void VsnprintfTestCase::Asterisk()
 392 {
 393     CMP5("       0.1", "%*.*f", 10, 1, 0.123);
 394     CMP5("    0.1230", "%*.*f", 10, 4, 0.123);
 395     CMP5("0.1", "%*.*f", 3, 1, 0.123);
 396
 397     CMP4("%0.002", "%%%.*f", 3, 0.0023456789);
 398
 399     CMP4("       a", "%*c", 8, 'a');
 400     CMP4("    four", "%*s", 8, "four");
 401     CMP6("    four   four", "%*s %*s", 8, "four", 6, "four");
 402 }
 403
 404 void VsnprintfTestCase::Percent()
 405 {
 406     // some tests without any argument passed through ...
 407     CMP2("%", "%%");
 408     CMP2("%%%", "%%%%%%");
 409
 410     CMP3("%  abc", "%%%5s", wxT("abc"));
 411     CMP3("%  abc%", "%%%5s%%", wxT("abc"));
 412
 413     // do not test odd number of '%' symbols as different implementations
 414     // of snprintf() give different outputs as this situation is not considered
 415     // by any standard (in fact, GCC will also warn you about a spurious % if
 416     // you write %%% as argument of some *printf function !)
 417     // Compare(wxT("%"), wxT("%%%"));
 418 }
 419
 420 #ifdef wxLongLong_t
 421 void VsnprintfTestCase::LongLong()
 422 {
 423     CMP3("123456789", "%lld", (wxLongLong_t)123456789);
 424     CMP3("-123456789", "%lld", (wxLongLong_t)-123456789);
 425
 426     CMP3("123456789", "%llu", (wxULongLong_t)123456789);
 427
 428 #ifdef __WINDOWS__
 429     CMP3("123456789", "%I64d", (wxLongLong_t)123456789);
 430     CMP3("123456789abcdef", "%I64x", wxLL(0x123456789abcdef));
 431 #endif
 432 }
 433 #endif
 434
 435 void VsnprintfTestCase::WrongFormatStrings()
 436 {
 437     // test how wxVsnprintf() behaves with wrong format string:
 438
 439 #if 0
 440     // NB: the next 2 tests currently return an error but it would be nice
 441     //     if they didn't (see ticket #9367)
 442
 443     // two positionals with the same index:
 444     r = wxSnprintf(buf, MAX_TEST_LEN, wxT("%1$s %1$s"), "hello");
 445     CPPUNIT_ASSERT(r != -1);
 446
 447     // three positionals with the same index mixed with other pos args:
 448     r = wxSnprintf(buf, MAX_TEST_LEN, wxT("%4$d %2$f %1$s %2$s %3$d"), "hello", "world", 3, 4);
 449     CPPUNIT_ASSERT(r != -1);
 450 #endif
 451
 452     // a missing positional arg should result in an assert
 453     WX_ASSERT_FAILS_WITH_ASSERT(
 454             wxSnprintf(buf, MAX_TEST_LEN, wxT("%1$d %3$d"), 1, 2, 3) );
 455
 456     // positional and non-positionals in the same format string:
 457     r = wxSnprintf(buf, MAX_TEST_LEN, wxT("%1$d %d %3$d"), 1, 2, 3);
 458     CPPUNIT_ASSERT_EQUAL(-1, r);
 459 }
 460
 461 // BigToSmallBuffer() test case helper:
 462 template<typename T>
 463 void VsnprintfTestCase::DoBigToSmallBuffer(T *buffer, int size)
 464 {
 465     // Remember that wx*printf could be mapped either to system
 466     // implementation or to wx implementation.
 467     // In the first case, when the output buffer is too small, the returned
 468     // value can be the number of characters required for the output buffer
 469     // (conforming to ISO C99; implemented in e.g. GNU libc >= 2.1), or
 470     // just a negative number, usually -1; (this is how e.g. MSVC's
 471     // *printf() behaves). Luckily, in all implementations, when the
 472     // output buffer is too small, it's nonetheless filled up to its max size.
 473     //
 474     // Note that in the second case (i.e. when we're using our own implementation),
 475     // wxVsnprintf() will return the number of characters written in the standard
 476     // output or
 477     //   -1         if there was an error in the format string
 478     //   maxSize+1  if the output buffer is too small
 479
 480     wxString errStr;
 481     errStr << "The size of the buffer was " << size;
 482     std::string errMsg(errStr.mb_str());
 483
 484     // test without positionals
 485     CMPTOSIZE(buffer, size, errMsg,
 486               "123456789012 - test - 123 -4.567",
 487               "%i%li - test - %d %.3f",
 488               123, (long int)456789012, 123, -4.567);
 489
 490 #if wxUSE_PRINTF_POS_PARAMS
 491     // test with positional
 492     CMPTOSIZE(buffer, size, errMsg,
 493               "-4.567 123 - test - 456789012 123",
 494               "%4$.3f %1$i - test - %2$li %3$d",
 495               123, (long int)456789012, 123, -4.567);
 496 #endif
 497
 498     // test unicode/ansi conversion specifiers
 499     //
 500     // NB: we use wxUnsafeSnprintf() as %hs and %hc are invalid in printf
 501     //     format and gcc would warn about this otherwise
 502
 503     r = wxUnsafeSnprintf(buffer, size,
 504                          wxT("unicode string/char: %ls/%lc -- ansi string/char: %hs/%hc"),
 505                          L"unicode", L'U', "ansi", 'A');
 506     wxString expected =
 507         wxString(wxT("unicode string/char: unicode/U -- ansi string/char: ansi/A")).Left(size - 1);
 508
 509     CPPUNIT_ASSERT( r != -1 );
 510     CPPUNIT_ASSERT_EQUAL(
 511         expected,
 512         wxString(buffer)
 513     );
 514 }
 515
 516 void VsnprintfTestCase::BigToSmallBuffer()
 517 {
 518     // VC6 can't compile this code
 519 #if !defined(__VISUALC__) || (__VISUALC__ >= 1310)
 520 #if wxUSE_UNICODE
 521     wchar_t bufw[1024], bufw2[16], bufw3[4], bufw4;
 522     DoBigToSmallBuffer(bufw, 1024);
 523     DoBigToSmallBuffer(bufw2, 16);
 524     DoBigToSmallBuffer(bufw3, 4);
 525     DoBigToSmallBuffer(&bufw4, 1);
 526 #endif // wxUSE_UNICODE
 527
 528     char bufa[1024], bufa2[16], bufa3[4], bufa4;
 529     DoBigToSmallBuffer(bufa, 1024);
 530     DoBigToSmallBuffer(bufa2, 16);
 531     DoBigToSmallBuffer(bufa3, 4);
 532     DoBigToSmallBuffer(&bufa4, 1);
 533 #endif // !VC6
 534 }
 535
 536 // Miscellaneous() test case helper:
 537 void VsnprintfTestCase::DoMisc(
 538         int expectedLen,
 539         const wxString& expectedString,
 540         size_t max,
 541         const wxChar *format, ...)
 542 {
 543     const size_t BUFSIZE = MAX_TEST_LEN - 1;
 544     size_t i;
 545     static int count = 0;
 546
 547     wxASSERT(max <= BUFSIZE);
 548
 549     for (i = 0; i < BUFSIZE; i++)
 550         buf[i] = '*';
 551     buf[BUFSIZE] = 0;
 552
 553     va_list ap;
 554     va_start(ap, format);
 555
 556     int n = wxVsnprintf(buf, max, format, ap);
 557
 558     va_end(ap);
 559
 560     // Prepare messages so that it is possible to see from the error which
 561     // test was running.
 562     wxString errStr, overflowStr;
 563     errStr << wxT("No.: ") << ++count << wxT(", expected: ") << expectedLen
 564            << wxT(" '") << expectedString << wxT("', result: ");
 565     overflowStr << errStr << wxT("buffer overflow");
 566     errStr << n << wxT(" '") << buf << wxT("'");
 567
 568     // turn them into std::strings
 569     std::string errMsg(errStr.mb_str());
 570     std::string overflowMsg(overflowStr.mb_str());
 571
 572     CPPUNIT_ASSERT_MESSAGE(errMsg,
 573             (expectedLen == -1 && size_t(n) >= max) || expectedLen == n);
 574
 575     CPPUNIT_ASSERT_MESSAGE(errMsg, expectedString == buf);
 576
 577     for (i = max; i < BUFSIZE; i++)
 578         CPPUNIT_ASSERT_MESSAGE(overflowMsg, buf[i] == '*');
 579 }
 580
 581 void VsnprintfTestCase::Miscellaneous()
 582 {
 583     // expectedLen, expectedString, max, format, ...
 584     DoMisc(5,  wxT("-1234"),   8, wxT("%d"), -1234);
 585     DoMisc(7,  wxT("1234567"), 8, wxT("%d"), 1234567);
 586     DoMisc(-1, wxT("1234567"), 8, wxT("%d"), 12345678);
 587     DoMisc(-1, wxT("-123456"), 8, wxT("%d"), -1234567890);
 588
 589     DoMisc(6,  wxT("123456"),  8, wxT("123456"));
 590     DoMisc(7,  wxT("1234567"), 8, wxT("1234567"));
 591     DoMisc(-1, wxT("1234567"), 8, wxT("12345678"));
 592
 593     DoMisc(6,  wxT("123450"),  8, wxT("12345%d"), 0);
 594     DoMisc(7,  wxT("1234560"), 8, wxT("123456%d"), 0);
 595     DoMisc(-1, wxT("1234567"), 8, wxT("1234567%d"), 0);
 596     DoMisc(-1, wxT("1234567"), 8, wxT("12345678%d"), 0);
 597
 598     DoMisc(6,  wxT("12%45%"),  8, wxT("12%%45%%"));
 599     DoMisc(7,  wxT("12%45%7"), 8, wxT("12%%45%%7"));
 600     DoMisc(-1, wxT("12%45%7"), 8, wxT("12%%45%%78"));
 601
 602     DoMisc(5,  wxT("%%%%%"),   6, wxT("%%%%%%%%%%"));
 603     DoMisc(6,  wxT("%%%%12"),  7, wxT("%%%%%%%%%d"), 12);
 604 }
 605
 606
 607 /* (C) Copyright C E Chew
 608 *
 609 * Feel free to copy, use and distribute this software provided:
 610 *
 611 *        1. you do not pretend that you wrote it
 612 *        2. you leave this copyright notice intact.
 613 */
 614
 615 void VsnprintfTestCase::GlibcMisc1()
 616 {
 617     CMP3("     ",    "%5.s", "xyz");
 618     CMP3("   33",    "%5.f", 33.3);
 619 #ifdef wxUSING_VC_CRT_IO
 620     // see the previous notes about the minimum width of mantissa:
 621     CMP3("  3e+008", "%8.e", 33.3e7);
 622     CMP3("  3E+008", "%8.E", 33.3e7);
 623     CMP3("3e+001",    "%.g",  33.3);
 624     CMP3("3E+001",    "%.G",  33.3);
 625 #else
 626     CMP3("   3e+08", "%8.e", 33.3e7);
 627     CMP3("   3E+08", "%8.E", 33.3e7);
 628     CMP3("3e+01",    "%.g",  33.3);
 629     CMP3("3E+01",    "%.G",  33.3);
 630 #endif
 631 }
 632
 633 void VsnprintfTestCase::GlibcMisc2()
 634 {
 635     int prec;
 636     wxString test_format;
 637
 638     prec = 0;
 639     CMP4("3", "%.*g", prec, 3.3);
 640
 641     prec = 0;
 642     CMP4("3", "%.*G", prec, 3.3);
 643
 644     prec = 0;
 645     CMP4("      3", "%7.*G", prec, 3.33);
 646
 647     prec = 3;
 648     CMP4(" 041", "%04.*o", prec, 33);
 649
 650     prec = 7;
 651     CMP4("  0000033", "%09.*u", prec, 33);
 652
 653     prec = 3;
 654     CMP4(" 021", "%04.*x", prec, 33);
 655
 656     prec = 3;
 657     CMP4(" 021", "%04.*X", prec, 33);
 658 }
 659
 660 #endif // wxUSE_WXVSNPRINTF
 661