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 // Visual C++ run-time produces different results from glibc (not sure if this
  38 // was tested using other run-times to be honest) so adjust the test results in
  39 // some cases. Remember that while we test our own wxPrintf() code here, it
  40 // uses the system sprintf() for actual formatting so the results are still
  41 // different under different systems.
  42 //
  43 // Notice that MinGW uses VC CRT by default but may use its own printf()
  44 // implementation if __USE_MINGW_ANSI_STDIO is defined. And finally also notice
  45 // that testing for __USE_MINGW_ANSI_STDIO directly results in a warning with
  46 // -Wundef if it involves an operation with undefined __MINGW_FEATURES__ so
  47 // test for the latter too to avoid it.
  48 #if defined(__VISUALC__) || \
  49     (defined(__MINGW32__) && !defined(__MINGW_FEATURES__) || !__USE_MINGW_ANSI_STDIO)
  50     #define USING_VC_CRT
  51 #endif
  52
  53 // ----------------------------------------------------------------------------
  54 // global utilities for testing
  55 // ----------------------------------------------------------------------------
  56
  57 #define MAX_TEST_LEN        1024
  58
  59 // temporary buffers
  60 static wxChar buf[MAX_TEST_LEN];
  61 int r;
  62
  63 // these macros makes it possible to write all tests without repeating a lot
  64 // of times the wxT() macro
  65 // NOTE: you should use expected strings with these macros which do not exceed
  66 //       MAX_TEST_LEN as these macro do check if the return value is == (int)wxStrlen(buf)
  67
  68 #define ASSERT_STR_EQUAL( a, b ) \
  69     CPPUNIT_ASSERT_EQUAL( wxString(a), wxString(b) );
  70
  71 #define CMP6(expected, fmt, y, z, w, t)                    \
  72     r=wxSnprintf(buf, MAX_TEST_LEN, wxT(fmt), y, z, w, t); \
  73     CPPUNIT_ASSERT_EQUAL( r, wxStrlen(buf) );          \
  74     ASSERT_STR_EQUAL( wxT(expected), buf );
  75
  76 #define CMP5(expected, fmt, y, z, w)                    \
  77     r=wxSnprintf(buf, MAX_TEST_LEN, wxT(fmt), y, z, w); \
  78     CPPUNIT_ASSERT_EQUAL( r, wxStrlen(buf) );          \
  79     ASSERT_STR_EQUAL( wxT(expected), buf );
  80
  81 #define CMP4(expected, fmt, y, z)                     \
  82     r=wxSnprintf(buf, MAX_TEST_LEN, wxT(fmt), y, z);  \
  83     CPPUNIT_ASSERT_EQUAL( r, wxStrlen(buf) );          \
  84     ASSERT_STR_EQUAL( wxT(expected), buf );
  85
  86 #define CMP3(expected, fmt, y)                        \
  87     r=wxSnprintf(buf, MAX_TEST_LEN, wxT(fmt), y);     \
  88     CPPUNIT_ASSERT_EQUAL( r, wxStrlen(buf) );          \
  89     ASSERT_STR_EQUAL( wxT(expected), buf );
  90
  91 #define CMP3i(expected, fmt, y)                        \
  92     r=wxSnprintf(buf, MAX_TEST_LEN, wxT(fmt), y);     \
  93     CPPUNIT_ASSERT_EQUAL( r, wxStrlen(buf) );          \
  94     WX_ASSERT_MESSAGE( ("Expected \"%s\", got \"%s\"", expected, buf), \
  95                        wxStricmp(expected, buf) == 0 );
  96
  97 #define CMP2(expected, fmt)                           \
  98     r=wxSnprintf(buf, MAX_TEST_LEN, wxT(fmt));        \
  99     CPPUNIT_ASSERT_EQUAL( r, wxStrlen(buf) );          \
 100     ASSERT_STR_EQUAL( wxT(expected), buf );
 101
 102 // NOTE: this macro is used also with too-small buffers (see Miscellaneous())
 103 //       test function, thus the return value can be > size and thus we
 104 //       cannot check if r == (int)wxStrlen(buf)
 105 #define CMPTOSIZE(buffer, size, failuremsg, expected, fmt, x, y, z, w)  \
 106     r=wxSnprintf(buffer, size, wxT(fmt), x, y, z, w);                   \
 107     CPPUNIT_ASSERT( r > 0 );                                            \
 108     CPPUNIT_ASSERT_EQUAL_MESSAGE(                                       \
 109         failuremsg,                                                     \
 110         wxString(wxT(expected)).Left(size - 1),                         \
 111         wxString(buffer))
 112
 113 // this is the same as wxSnprintf() but it passes the format string to
 114 // wxVsnprintf() without using WX_ATTRIBUTE_PRINTF and thus suppresses the gcc
 115 // checks (and resulting warnings) for the format string
 116 //
 117 // use with extreme care and only when you're really sure the warnings must be
 118 // suppressed!
 119 template<typename T>
 120 static int
 121 wxUnsafeSnprintf(T *buf, size_t len, const wxChar *fmt, ...)
 122 {
 123     va_list args;
 124     va_start(args, fmt);
 125
 126     int rc = wxVsnprintf(buf, len, fmt, args);
 127
 128     va_end(args);
 129
 130     return rc;
 131 }
 132
 133 // ----------------------------------------------------------------------------
 134 // test class
 135 // ----------------------------------------------------------------------------
 136
 137 class VsnprintfTestCase : public CppUnit::TestCase
 138 {
 139 public:
 140     VsnprintfTestCase() {}
 141
 142     virtual void setUp();
 143
 144 private:
 145     CPPUNIT_TEST_SUITE( VsnprintfTestCase );
 146         CPPUNIT_TEST( C );
 147         CPPUNIT_TEST( D );
 148         CPPUNIT_TEST( X );
 149         CPPUNIT_TEST( O );
 150         CPPUNIT_TEST( P );
 151         CPPUNIT_TEST( N );
 152         CPPUNIT_TEST( E );
 153         CPPUNIT_TEST( F );
 154         CPPUNIT_TEST( G );
 155         CPPUNIT_TEST( S );
 156         CPPUNIT_TEST( Asterisk );
 157         CPPUNIT_TEST( Percent );
 158 #ifdef wxLongLong_t
 159         CPPUNIT_TEST( LongLong );
 160 #endif
 161
 162         CPPUNIT_TEST( BigToSmallBuffer );
 163         CPPUNIT_TEST( WrongFormatStrings );
 164         CPPUNIT_TEST( Miscellaneous );
 165         CPPUNIT_TEST( GlibcMisc1 );
 166         CPPUNIT_TEST( GlibcMisc2 );
 167     CPPUNIT_TEST_SUITE_END();
 168
 169     void C();
 170     void D();
 171     void X();
 172     void O();
 173     void P();
 174     void N();
 175     void E();
 176     void F();
 177     void G();
 178     void S();
 179     void Asterisk();
 180     void Percent();
 181 #ifdef wxLongLong_t
 182     void LongLong();
 183 #endif
 184     void Unicode();
 185
 186     template<typename T>
 187         void DoBigToSmallBuffer(T *buffer, int size);
 188     void BigToSmallBuffer();
 189
 190     void WrongFormatStrings();
 191
 192     // compares the expectedString and the result of wxVsnprintf() char by char
 193     // for all its lenght (not only for first expectedLen chars) and also
 194     // checks the return value
 195     void DoMisc(int expectedLen, const wxString& expectedString,
 196                 size_t max, const wxChar *format, ...);
 197     void Miscellaneous();
 198
 199     void GlibcMisc1();
 200     void GlibcMisc2();
 201
 202     DECLARE_NO_COPY_CLASS(VsnprintfTestCase)
 203 };
 204
 205 // register in the unnamed registry so that these tests are run by default
 206 CPPUNIT_TEST_SUITE_REGISTRATION( VsnprintfTestCase );
 207
 208 // also include in it's own registry so that these tests can be run alone
 209 CPPUNIT_TEST_SUITE_NAMED_REGISTRATION( VsnprintfTestCase, "VsnprintfTestCase" );
 210
 211 void VsnprintfTestCase::setUp()
 212 {
 213     // this call is required to avoid check failures when running on machines
 214     // with a locale where the decimal point is not '.'
 215     wxSetlocale(LC_ALL, "C");
 216 }
 217
 218 void VsnprintfTestCase::C()
 219 {
 220     CMP5("hi!", "%c%c%c", wxT('h'), wxT('i'), wxT('!'));
 221
 222     // NOTE:
 223     // the NULL characters _can_ be passed to %c to e.g. create strings
 224     // with embedded NULs (because strings are not always supposed to be
 225     // NUL-terminated).
 226
 227     DoMisc(14, wxT("Hello \0 World!"), 16, wxT("Hello %c World!"), wxT('\0'));
 228 }
 229
 230 void VsnprintfTestCase::D()
 231 {
 232     CMP3("+123456", "%+d", 123456);
 233     CMP3("-123456", "%d", -123456);
 234     CMP3(" 123456", "% d", 123456);
 235     CMP3("    123456", "%10d", 123456);
 236     CMP3("0000123456", "%010d", 123456);
 237     CMP3("-123456   ", "%-10d", -123456);
 238 }
 239
 240 void VsnprintfTestCase::X()
 241 {
 242     CMP3("ABCD", "%X", 0xABCD);
 243     CMP3("0XABCD", "%#X", 0xABCD);
 244     CMP3("0xabcd", "%#x", 0xABCD);
 245 }
 246
 247 void VsnprintfTestCase::O()
 248 {
 249     CMP3("1234567", "%o", 01234567);
 250     CMP3("01234567", "%#o", 01234567);
 251 }
 252
 253 void VsnprintfTestCase::P()
 254 {
 255     // WARNING: printing of pointers is not fully standard.
 256     //          GNU prints them as %#x except for NULL pointers which are
 257     //          printed as '(nil)'.
 258     //          MSVC always print them as %8X on 32 bit systems and as %16X
 259     //          on 64 bit systems
 260     //          mingw32 uses MSVC CRT in old versions but is own implementation
 261     //          now which is somewhere in the middle as it uses %8x, so to
 262     //          catch both cases we use case-insensitive comparison here.
 263 #ifdef USING_VC_CRT
 264     #if SIZEOF_VOID_P == 4
 265         CMP3i("00ABCDEF", "%p", (void*)0xABCDEF);
 266         CMP3("00000000", "%p", (void*)NULL);
 267     #elif SIZEOF_VOID_P == 8
 268         CMP3i("0000ABCDEFABCDEF", "%p", (void*)0xABCDEFABCDEF);
 269         CMP3("0000000000000000", "%p", (void*)NULL);
 270     #endif
 271 #elif defined(__MINGW32__)
 272     CMP3("0xabcdef", "%p", (void*)0xABCDEF);
 273     CMP3("0", "%p", (void*)NULL);
 274 #elif defined(__GNUG__)
 275     CMP3("0xabcdef", "%p", (void*)0xABCDEF);
 276     CMP3("(nil)", "%p", (void*)NULL);
 277 #endif
 278 }
 279
 280 void VsnprintfTestCase::N()
 281 {
 282     int nchar;
 283
 284     wxSnprintf(buf, MAX_TEST_LEN, wxT("%d %s%n\n"), 3, wxT("bears"), &nchar);
 285     CPPUNIT_ASSERT_EQUAL( 7, nchar );
 286 }
 287
 288 void VsnprintfTestCase::E()
 289 {
 290     // NB: there are no standards about the minimum exponent width
 291     //     (and the width of the %e conversion specifier refers to the
 292     //      mantissa, not to the exponent).
 293     //     Since newer MSVC versions use 3 digits as minimum exponent
 294     //     width while GNU libc uses 2 digits as minimum width, here we
 295     //     workaround this problem using for the exponent values with at
 296     //     least three digits.
 297     //     Some examples:
 298     //       printf("%e",2.342E+02);
 299     //     -> under MSVC7.1 prints:      2.342000e+002
 300     //     -> under GNU libc 2.4 prints: 2.342000e+02
 301     CMP3("2.342000e+112", "%e",2.342E+112);
 302     CMP3("-2.3420e-112", "%10.4e",-2.342E-112);
 303     CMP3("-2.3420e-112", "%11.4e",-2.342E-112);
 304     CMP3("   -2.3420e-112", "%15.4e",-2.342E-112);
 305
 306     CMP3("-0.02342", "%G",-2.342E-02);
 307     CMP3("3.1415E-116", "%G",3.1415e-116);
 308     CMP3("0003.141500e+103", "%016e", 3141.5e100);
 309     CMP3("   3.141500e+103", "%16e", 3141.5e100);
 310     CMP3("3.141500e+103   ", "%-16e", 3141.5e100);
 311     CMP3("3.142e+103", "%010.3e", 3141.5e100);
 312 }
 313
 314 void VsnprintfTestCase::F()
 315 {
 316     CMP3("3.300000", "%5f", 3.3);
 317     CMP3("3.000000", "%5f", 3.0);
 318     CMP3("0.000100", "%5f", .999999E-4);
 319     CMP3("0.000990", "%5f", .99E-3);
 320     CMP3("3333.000000", "%5f", 3333.0);
 321 }
 322
 323 void VsnprintfTestCase::G()
 324 {
 325     // NOTE: the same about E() testcase applies here...
 326
 327     CMP3("  3.3", "%5g", 3.3);
 328     CMP3("    3", "%5g", 3.0);
 329     CMP3("9.99999e-115", "%5g", .999999E-114);
 330     CMP3("0.00099", "%5g", .99E-3);
 331     CMP3(" 3333", "%5g", 3333.0);
 332     CMP3(" 0.01", "%5g", 0.01);
 333
 334     CMP3("    3", "%5.g", 3.3);
 335     CMP3("    3", "%5.g", 3.0);
 336     CMP3("1e-114", "%5.g", .999999E-114);
 337     CMP3("0.0001", "%5.g", 1.0E-4);
 338     CMP3("0.001", "%5.g", .99E-3);
 339     CMP3("3e+103", "%5.g", 3333.0E100);
 340     CMP3(" 0.01", "%5.g", 0.01);
 341
 342     CMP3("  3.3", "%5.2g", 3.3);
 343     CMP3("    3", "%5.2g", 3.0);
 344     CMP3("1e-114", "%5.2g", .999999E-114);
 345     CMP3("0.00099", "%5.2g", .99E-3);
 346     CMP3("3.3e+103", "%5.2g", 3333.0E100);
 347     CMP3(" 0.01", "%5.2g", 0.01);
 348 }
 349
 350 void VsnprintfTestCase::S()
 351 {
 352     CMP3("  abc", "%5s", wxT("abc"));
 353     CMP3("    a", "%5s", wxT("a"));
 354     CMP3("abcdefghi", "%5s", wxT("abcdefghi"));
 355     CMP3("abc  ", "%-5s", wxT("abc"));
 356     CMP3("abcdefghi", "%-5s", wxT("abcdefghi"));
 357
 358     CMP3("abcde", "%.5s", wxT("abcdefghi"));
 359
 360     // do the same tests but with Unicode characters:
 361 #if wxUSE_UNICODE
 362
 363     // Unicode code points from U+03B1 to U+03B9 are the greek letters alpha-iota;
 364     // UTF8 encoding of such code points is 0xCEB1 to 0xCEB9
 365
 366 #define ALPHA       "\xCE\xB1"
 367         // alpha
 368 #define ABC         "\xCE\xB1\xCE\xB2\xCE\xB3"
 369         // alpha+beta+gamma
 370 #define ABCDE       "\xCE\xB1\xCE\xB2\xCE\xB3\xCE\xB4\xCE\xB5"
 371         // alpha+beta+gamma+delta+epsilon
 372 #define ABCDEFGHI   "\xCE\xB1\xCE\xB2\xCE\xB3\xCE\xB4\xCE\xB5\xCE\xB6\xCE\xB7\xCE\xB8\xCE\xB9"
 373         // alpha+beta+gamma+delta+epsilon+zeta+eta+theta+iota
 374
 375     // the 'expected' and 'arg' parameters of this macro are supposed to be
 376     // UTF-8 strings
 377 #define CMP3_UTF8(expected, fmt, arg)                                         \
 378     CPPUNIT_ASSERT_EQUAL                                                      \
 379     (                                                                         \
 380         wxString::FromUTF8(expected).length(),                                \
 381         wxSnprintf(buf, MAX_TEST_LEN, fmt, wxString::FromUTF8(arg))           \
 382     );                                                                        \
 383     CPPUNIT_ASSERT_EQUAL                                                      \
 384     (                                                                         \
 385         wxString::FromUTF8(expected),                                         \
 386         buf                                                                   \
 387     )
 388
 389     CMP3_UTF8("  " ABC,     "%5s",  ABC);
 390     CMP3_UTF8("    " ALPHA, "%5s",  ALPHA);
 391     CMP3_UTF8(ABCDEFGHI,    "%5s",  ABCDEFGHI);
 392     CMP3_UTF8(ABC "  ",     "%-5s", ABC);
 393     CMP3_UTF8(ABCDEFGHI,    "%-5s", ABCDEFGHI);
 394     CMP3_UTF8(ABCDE,        "%.5s", ABCDEFGHI);
 395 #endif // wxUSE_UNICODE
 396
 397     // test a string which has a NULL character after "ab";
 398     // obviously it should be handled exactly like just as "ab"
 399     CMP3("   ab", "%5s", wxT("ab\0cdefghi"));
 400 }
 401
 402 void VsnprintfTestCase::Asterisk()
 403 {
 404     CMP5("       0.1", "%*.*f", 10, 1, 0.123);
 405     CMP5("    0.1230", "%*.*f", 10, 4, 0.123);
 406     CMP5("0.1", "%*.*f", 3, 1, 0.123);
 407
 408     CMP4("%0.002", "%%%.*f", 3, 0.0023456789);
 409
 410     CMP4("       a", "%*c", 8, 'a');
 411     CMP4("    four", "%*s", 8, "four");
 412     CMP6("    four   four", "%*s %*s", 8, "four", 6, "four");
 413 }
 414
 415 void VsnprintfTestCase::Percent()
 416 {
 417     // some tests without any argument passed through ...
 418     CMP2("%", "%%");
 419     CMP2("%%%", "%%%%%%");
 420
 421     CMP3("%  abc", "%%%5s", wxT("abc"));
 422     CMP3("%  abc%", "%%%5s%%", wxT("abc"));
 423
 424     // do not test odd number of '%' symbols as different implementations
 425     // of snprintf() give different outputs as this situation is not considered
 426     // by any standard (in fact, GCC will also warn you about a spurious % if
 427     // you write %%% as argument of some *printf function !)
 428     // Compare(wxT("%"), wxT("%%%"));
 429 }
 430
 431 #ifdef wxLongLong_t
 432 void VsnprintfTestCase::LongLong()
 433 {
 434     CMP3("123456789", "%lld", (wxLongLong_t)123456789);
 435     CMP3("-123456789", "%lld", (wxLongLong_t)-123456789);
 436
 437     CMP3("123456789", "%llu", (wxULongLong_t)123456789);
 438
 439 #ifdef __WXMSW__
 440     CMP3("123456789", "%I64d", (wxLongLong_t)123456789);
 441     CMP3("123456789abcdef", "%I64x", wxLL(0x123456789abcdef));
 442 #endif
 443 }
 444 #endif
 445
 446 void VsnprintfTestCase::WrongFormatStrings()
 447 {
 448     // test how wxVsnprintf() behaves with wrong format string:
 449
 450 #if 0
 451     // NB: the next 2 tests currently return an error but it would be nice
 452     //     if they didn't (see ticket #9367)
 453
 454     // two positionals with the same index:
 455     r = wxSnprintf(buf, MAX_TEST_LEN, wxT("%1$s %1$s"), "hello");
 456     CPPUNIT_ASSERT(r != -1);
 457
 458     // three positionals with the same index mixed with other pos args:
 459     r = wxSnprintf(buf, MAX_TEST_LEN, wxT("%4$d %2$f %1$s %2$s %3$d"), "hello", "world", 3, 4);
 460     CPPUNIT_ASSERT(r != -1);
 461 #endif
 462
 463     // a missing positional arg should result in an assert
 464     WX_ASSERT_FAILS_WITH_ASSERT(
 465             wxSnprintf(buf, MAX_TEST_LEN, wxT("%1$d %3$d"), 1, 2, 3) );
 466
 467     // positional and non-positionals in the same format string:
 468     r = wxSnprintf(buf, MAX_TEST_LEN, wxT("%1$d %d %3$d"), 1, 2, 3);
 469     CPPUNIT_ASSERT_EQUAL(-1, r);
 470 }
 471
 472 // BigToSmallBuffer() test case helper:
 473 template<typename T>
 474 void VsnprintfTestCase::DoBigToSmallBuffer(T *buffer, int size)
 475 {
 476     // Remember that wx*printf could be mapped either to system
 477     // implementation or to wx implementation.
 478     // In the first case, when the output buffer is too small, the returned
 479     // value can be the number of characters required for the output buffer
 480     // (conforming to ISO C99; implemented in e.g. GNU libc >= 2.1), or
 481     // just a negative number, usually -1; (this is how e.g. MSVC's
 482     // *printf() behaves). Luckily, in all implementations, when the
 483     // output buffer is too small, it's nonetheless filled up to its max size.
 484     //
 485     // Note that in the second case (i.e. when we're using our own implementation),
 486     // wxVsnprintf() will return the number of characters written in the standard
 487     // output or
 488     //   -1         if there was an error in the format string
 489     //   maxSize+1  if the output buffer is too small
 490
 491     wxString errStr;
 492     errStr << "The size of the buffer was " << size;
 493     std::string errMsg(errStr.mb_str());
 494
 495     // test without positionals
 496     CMPTOSIZE(buffer, size, errMsg,
 497               "123456789012 - test - 123 -4.567",
 498               "%i%li - test - %d %.3f",
 499               123, (long int)456789012, 123, -4.567);
 500
 501 #if wxUSE_PRINTF_POS_PARAMS
 502     // test with positional
 503     CMPTOSIZE(buffer, size, errMsg,
 504               "-4.567 123 - test - 456789012 123",
 505               "%4$.3f %1$i - test - %2$li %3$d",
 506               123, (long int)456789012, 123, -4.567);
 507 #endif
 508
 509     // test unicode/ansi conversion specifiers
 510     //
 511     // NB: we use wxUnsafeSnprintf() as %hs and %hc are invalid in printf
 512     //     format and gcc would warn about this otherwise
 513
 514     r = wxUnsafeSnprintf(buffer, size,
 515                          wxT("unicode string/char: %ls/%lc -- ansi string/char: %hs/%hc"),
 516                          L"unicode", L'U', "ansi", 'A');
 517     wxString expected =
 518         wxString(wxT("unicode string/char: unicode/U -- ansi string/char: ansi/A")).Left(size - 1);
 519
 520     CPPUNIT_ASSERT( r != -1 );
 521     CPPUNIT_ASSERT_EQUAL(
 522         expected,
 523         wxString(buffer)
 524     );
 525 }
 526
 527 void VsnprintfTestCase::BigToSmallBuffer()
 528 {
 529     // VC6 can't compile this code
 530 #if !defined(__VISUALC__) || (__VISUALC__ >= 1310)
 531 #if wxUSE_UNICODE
 532     wchar_t bufw[1024], bufw2[16], bufw3[4], bufw4;
 533     DoBigToSmallBuffer(bufw, 1024);
 534     DoBigToSmallBuffer(bufw2, 16);
 535     DoBigToSmallBuffer(bufw3, 4);
 536     DoBigToSmallBuffer(&bufw4, 1);
 537 #endif // wxUSE_UNICODE
 538
 539     char bufa[1024], bufa2[16], bufa3[4], bufa4;
 540     DoBigToSmallBuffer(bufa, 1024);
 541     DoBigToSmallBuffer(bufa2, 16);
 542     DoBigToSmallBuffer(bufa3, 4);
 543     DoBigToSmallBuffer(&bufa4, 1);
 544 #endif // !VC6
 545 }
 546
 547 // Miscellaneous() test case helper:
 548 void VsnprintfTestCase::DoMisc(
 549         int expectedLen,
 550         const wxString& expectedString,
 551         size_t max,
 552         const wxChar *format, ...)
 553 {
 554     const size_t BUFSIZE = MAX_TEST_LEN - 1;
 555     size_t i;
 556     static int count = 0;
 557
 558     wxASSERT(max <= BUFSIZE);
 559
 560     for (i = 0; i < BUFSIZE; i++)
 561         buf[i] = '*';
 562     buf[BUFSIZE] = 0;
 563
 564     va_list ap;
 565     va_start(ap, format);
 566
 567     int n = wxVsnprintf(buf, max, format, ap);
 568
 569     va_end(ap);
 570
 571     // Prepare messages so that it is possible to see from the error which
 572     // test was running.
 573     wxString errStr, overflowStr;
 574     errStr << wxT("No.: ") << ++count << wxT(", expected: ") << expectedLen
 575            << wxT(" '") << expectedString << wxT("', result: ");
 576     overflowStr << errStr << wxT("buffer overflow");
 577     errStr << n << wxT(" '") << buf << wxT("'");
 578
 579     // turn them into std::strings
 580     std::string errMsg(errStr.mb_str());
 581     std::string overflowMsg(overflowStr.mb_str());
 582
 583     CPPUNIT_ASSERT_MESSAGE(errMsg,
 584             (expectedLen == -1 && size_t(n) >= max) || expectedLen == n);
 585
 586     CPPUNIT_ASSERT_MESSAGE(errMsg, expectedString == buf);
 587
 588     for (i = max; i < BUFSIZE; i++)
 589         CPPUNIT_ASSERT_MESSAGE(overflowMsg, buf[i] == '*');
 590 }
 591
 592 void VsnprintfTestCase::Miscellaneous()
 593 {
 594     // expectedLen, expectedString, max, format, ...
 595     DoMisc(5,  wxT("-1234"),   8, wxT("%d"), -1234);
 596     DoMisc(7,  wxT("1234567"), 8, wxT("%d"), 1234567);
 597     DoMisc(-1, wxT("1234567"), 8, wxT("%d"), 12345678);
 598     DoMisc(-1, wxT("-123456"), 8, wxT("%d"), -1234567890);
 599
 600     DoMisc(6,  wxT("123456"),  8, wxT("123456"));
 601     DoMisc(7,  wxT("1234567"), 8, wxT("1234567"));
 602     DoMisc(-1, wxT("1234567"), 8, wxT("12345678"));
 603
 604     DoMisc(6,  wxT("123450"),  8, wxT("12345%d"), 0);
 605     DoMisc(7,  wxT("1234560"), 8, wxT("123456%d"), 0);
 606     DoMisc(-1, wxT("1234567"), 8, wxT("1234567%d"), 0);
 607     DoMisc(-1, wxT("1234567"), 8, wxT("12345678%d"), 0);
 608
 609     DoMisc(6,  wxT("12%45%"),  8, wxT("12%%45%%"));
 610     DoMisc(7,  wxT("12%45%7"), 8, wxT("12%%45%%7"));
 611     DoMisc(-1, wxT("12%45%7"), 8, wxT("12%%45%%78"));
 612
 613     DoMisc(5,  wxT("%%%%%"),   6, wxT("%%%%%%%%%%"));
 614     DoMisc(6,  wxT("%%%%12"),  7, wxT("%%%%%%%%%d"), 12);
 615 }
 616
 617
 618 /* (C) Copyright C E Chew
 619 *
 620 * Feel free to copy, use and distribute this software provided:
 621 *
 622 *        1. you do not pretend that you wrote it
 623 *        2. you leave this copyright notice intact.
 624 */
 625
 626 void VsnprintfTestCase::GlibcMisc1()
 627 {
 628     CMP3("     ",    "%5.s", "xyz");
 629     CMP3("   33",    "%5.f", 33.3);
 630 #ifdef USING_VC_CRT
 631     // see the previous notes about the minimum width of mantissa:
 632     CMP3("  3e+008", "%8.e", 33.3e7);
 633     CMP3("  3E+008", "%8.E", 33.3e7);
 634     CMP3("3e+001",    "%.g",  33.3);
 635     CMP3("3E+001",    "%.G",  33.3);
 636 #else
 637     CMP3("   3e+08", "%8.e", 33.3e7);
 638     CMP3("   3E+08", "%8.E", 33.3e7);
 639     CMP3("3e+01",    "%.g",  33.3);
 640     CMP3("3E+01",    "%.G",  33.3);
 641 #endif
 642 }
 643
 644 void VsnprintfTestCase::GlibcMisc2()
 645 {
 646     int prec;
 647     wxString test_format;
 648
 649     prec = 0;
 650     CMP4("3", "%.*g", prec, 3.3);
 651
 652     prec = 0;
 653     CMP4("3", "%.*G", prec, 3.3);
 654
 655     prec = 0;
 656     CMP4("      3", "%7.*G", prec, 3.33);
 657
 658     prec = 3;
 659     CMP4(" 041", "%04.*o", prec, 33);
 660
 661     prec = 7;
 662     CMP4("  0000033", "%09.*u", prec, 33);
 663
 664     prec = 3;
 665     CMP4(" 021", "%04.*x", prec, 33);
 666
 667     prec = 3;
 668     CMP4(" 021", "%04.*X", prec, 33);
 669 }
 670
 671 #endif // wxUSE_WXVSNPRINTF
 672