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wxWidgets/tests/strings/vsnprintf.cpp

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///////////////////////////////////////////////////////////////////////////////
// Name: tests/strings/vsnprintf.cpp
// Purpose: wxVsnprintf unit test
// Author: Francesco Montorsi
// (part of this file was taken from CMP.c of TRIO package
// written by Bjorn Reese and Daniel Stenberg)
// Created: 2006-04-01
// RCS-ID: $Id$
// Copyright: (c) 2006 Francesco Montorsi, Bjorn Reese and Daniel Stenberg
///////////////////////////////////////////////////////////////////////////////
// ----------------------------------------------------------------------------
// headers
// ----------------------------------------------------------------------------
#include "testprec.h"
#ifdef __BORLANDC__
#pragma hdrstop
#endif
#include "wx/crt.h"
#if wxUSE_WXVSNPRINTF
#ifndef WX_PRECOMP
#include "wx/wx.h"
#include "wx/wxchar.h"
#endif // WX_PRECOMP
// NOTE: for more info about the specification of wxVsnprintf() behaviour you can
// refer to the following page of the GNU libc manual:
// http://www.gnu.org/software/libc/manual/html_node/Formatted-Output.html
// ----------------------------------------------------------------------------
// global utilities for testing
// ----------------------------------------------------------------------------
#define MAX_TEST_LEN 1024
// temporary buffers
static wxChar buf[MAX_TEST_LEN];
int r;
// these macros makes it possible to write all tests without repeating a lot
// of times the wxT() macro
// NOTE: you should use expected strings with these macros which do not exceed
// MAX_TEST_LEN as these macro do check if the return value is == (int)wxStrlen(buf)
#define ASSERT_STR_EQUAL( a, b ) \
CPPUNIT_ASSERT_EQUAL( wxString(a), wxString(b) );
#define CMP6(expected, fmt, y, z, w, t) \
r=wxSnprintf(buf, MAX_TEST_LEN, wxT(fmt), y, z, w, t); \
CPPUNIT_ASSERT_EQUAL( r, wxStrlen(buf) ); \
ASSERT_STR_EQUAL( wxT(expected), buf );
#define CMP5(expected, fmt, y, z, w) \
r=wxSnprintf(buf, MAX_TEST_LEN, wxT(fmt), y, z, w); \
CPPUNIT_ASSERT_EQUAL( r, wxStrlen(buf) ); \
ASSERT_STR_EQUAL( wxT(expected), buf );
#define CMP4(expected, fmt, y, z) \
r=wxSnprintf(buf, MAX_TEST_LEN, wxT(fmt), y, z); \
CPPUNIT_ASSERT_EQUAL( r, wxStrlen(buf) ); \
ASSERT_STR_EQUAL( wxT(expected), buf );
#define CMP3(expected, fmt, y) \
r=wxSnprintf(buf, MAX_TEST_LEN, wxT(fmt), y); \
CPPUNIT_ASSERT_EQUAL( r, wxStrlen(buf) ); \
ASSERT_STR_EQUAL( wxT(expected), buf );
#define CMP2(expected, fmt) \
r=wxSnprintf(buf, MAX_TEST_LEN, wxT(fmt)); \
CPPUNIT_ASSERT_EQUAL( r, wxStrlen(buf) ); \
ASSERT_STR_EQUAL( wxT(expected), buf );
// NOTE: this macro is used also with too-small buffers (see Miscellaneous())
// test function, thus the return value can be > size and thus we
// cannot check if r == (int)wxStrlen(buf)
#define CMPTOSIZE(buffer, size, failuremsg, expected, fmt, x, y, z, w) \
r=wxSnprintf(buffer, size, wxT(fmt), x, y, z, w); \
CPPUNIT_ASSERT( r > 0 ); \
CPPUNIT_ASSERT_EQUAL_MESSAGE( \
failuremsg, \
wxString(wxT(expected)).Left(size - 1), \
wxString(buffer))
// this is the same as wxSnprintf() but it passes the format string to
// wxVsnprintf() without using WX_ATTRIBUTE_PRINTF and thus suppresses the gcc
// checks (and resulting warnings) for the format string
//
// use with extreme care and only when you're really sure the warnings must be
// suppressed!
template<typename T>
static int
wxUnsafeSnprintf(T *buf, size_t len, const wxChar *fmt, ...)
{
va_list args;
va_start(args, fmt);
int rc = wxVsnprintf(buf, len, fmt, args);
va_end(args);
return rc;
}
// ----------------------------------------------------------------------------
// test class
// ----------------------------------------------------------------------------
class VsnprintfTestCase : public CppUnit::TestCase
{
public:
VsnprintfTestCase() {}
virtual void setUp();
private:
CPPUNIT_TEST_SUITE( VsnprintfTestCase );
CPPUNIT_TEST( C );
CPPUNIT_TEST( D );
CPPUNIT_TEST( X );
CPPUNIT_TEST( O );
CPPUNIT_TEST( P );
CPPUNIT_TEST( N );
CPPUNIT_TEST( E );
CPPUNIT_TEST( F );
CPPUNIT_TEST( G );
CPPUNIT_TEST( S );
CPPUNIT_TEST( Asterisk );
CPPUNIT_TEST( Percent );
#ifdef wxLongLong_t
CPPUNIT_TEST( LongLong );
#endif
CPPUNIT_TEST( BigToSmallBuffer );
#if wxUSE_WXVSNPRINTF
CPPUNIT_TEST( WrongFormatStrings );
#endif // wxUSE_WXVSNPRINTF
CPPUNIT_TEST( Miscellaneous );
CPPUNIT_TEST( GlibcMisc1 );
CPPUNIT_TEST( GlibcMisc2 );
CPPUNIT_TEST_SUITE_END();
void C();
void D();
void X();
void O();
void P();
void N();
void E();
void F();
void G();
void S();
void Asterisk();
void Percent();
#ifdef wxLongLong_t
void LongLong();
#endif
void Unicode();
template<typename T>
void DoBigToSmallBuffer(T *buffer, int size);
void BigToSmallBuffer();
#if wxUSE_WXVSNPRINTF
void WrongFormatStrings();
#endif // wxUSE_WXVSNPRINTF
// compares the expectedString and the result of wxVsnprintf() char by char
// for all its lenght (not only for first expectedLen chars) and also
// checks the return value
void DoMisc(int expectedLen, const wxString& expectedString,
size_t max, const wxChar *format, ...);
void Miscellaneous();
void GlibcMisc1();
void GlibcMisc2();
DECLARE_NO_COPY_CLASS(VsnprintfTestCase)
};
// register in the unnamed registry so that these tests are run by default
CPPUNIT_TEST_SUITE_REGISTRATION( VsnprintfTestCase );
// also include in it's own registry so that these tests can be run alone
CPPUNIT_TEST_SUITE_NAMED_REGISTRATION( VsnprintfTestCase, "VsnprintfTestCase" );
void VsnprintfTestCase::setUp()
{
// this call is required to avoid check failures when running on machines
// with a locale where the decimal point is not '.'
wxSetlocale(LC_ALL, "C");
}
void VsnprintfTestCase::C()
{
CMP5("hi!", "%c%c%c", wxT('h'), wxT('i'), wxT('!'));
// NOTE:
// the NULL characters _can_ be passed to %c to e.g. create strings
// with embedded NULs (because strings are not always supposed to be
// NUL-terminated).
DoMisc(14, wxT("Hello \0 World!"), 16, wxT("Hello %c World!"), wxT('\0'));
}
void VsnprintfTestCase::D()
{
CMP3("+123456", "%+d", 123456);
CMP3("-123456", "%d", -123456);
CMP3(" 123456", "% d", 123456);
CMP3(" 123456", "%10d", 123456);
CMP3("0000123456", "%010d", 123456);
CMP3("-123456 ", "%-10d", -123456);
}
void VsnprintfTestCase::X()
{
CMP3("ABCD", "%X", 0xABCD);
CMP3("0XABCD", "%#X", 0xABCD);
CMP3("0xabcd", "%#x", 0xABCD);
}
void VsnprintfTestCase::O()
{
CMP3("1234567", "%o", 01234567);
CMP3("01234567", "%#o", 01234567);
}
void VsnprintfTestCase::P()
{
// WARNING: printing of pointers is not fully standard.
// GNU prints them as %#x except for NULL pointers which are
// printed as '(nil)'.
// MSVC always print them as %8X on 32 bit systems and as %16X
// on 64 bit systems
// mingw32 uses MSVC CRT by default so uses the same rules
#if defined(__VISUALC__) || (defined(__MINGW32__) && !__USE_MINGW_ANSI_STDIO)
#if SIZEOF_VOID_P == 4
CMP3("00ABCDEF", "%p", (void*)0xABCDEF);
CMP3("00000000", "%p", (void*)NULL);
#elif SIZEOF_VOID_P == 8
CMP3("0000ABCDEFABCDEF", "%p", (void*)0xABCDEFABCDEF);
CMP3("0000000000000000", "%p", (void*)NULL);
#endif
#elif defined(__MINGW32__)
CMP3("0xabcdef", "%p", (void*)0xABCDEF);
CMP3("0", "%p", (void*)NULL);
#elif defined(__GNUG__)
CMP3("0xabcdef", "%p", (void*)0xABCDEF);
CMP3("(nil)", "%p", (void*)NULL);
#endif
}
void VsnprintfTestCase::N()
{
int nchar;
wxSnprintf(buf, MAX_TEST_LEN, wxT("%d %s%n\n"), 3, wxT("bears"), &nchar);
CPPUNIT_ASSERT_EQUAL( 7, nchar );
}
void VsnprintfTestCase::E()
{
// NB: there are no standards about the minimum exponent width
// (and the width of the %e conversion specifier refers to the
// mantissa, not to the exponent).
// Since newer MSVC versions use 3 digits as minimum exponent
// width while GNU libc uses 2 digits as minimum width, here we
// workaround this problem using for the exponent values with at
// least three digits.
// Some examples:
// printf("%e",2.342E+02);
// -> under MSVC7.1 prints: 2.342000e+002
// -> under GNU libc 2.4 prints: 2.342000e+02
CMP3("2.342000e+112", "%e",2.342E+112);
CMP3("-2.3420e-112", "%10.4e",-2.342E-112);
CMP3("-2.3420e-112", "%11.4e",-2.342E-112);
CMP3(" -2.3420e-112", "%15.4e",-2.342E-112);
CMP3("-0.02342", "%G",-2.342E-02);
CMP3("3.1415E-116", "%G",3.1415e-116);
CMP3("0003.141500e+103", "%016e", 3141.5e100);
CMP3(" 3.141500e+103", "%16e", 3141.5e100);
CMP3("3.141500e+103 ", "%-16e", 3141.5e100);
CMP3("3.142e+103", "%010.3e", 3141.5e100);
}
void VsnprintfTestCase::F()
{
CMP3("3.300000", "%5f", 3.3);
CMP3("3.000000", "%5f", 3.0);
CMP3("0.000100", "%5f", .999999E-4);
CMP3("0.000990", "%5f", .99E-3);
CMP3("3333.000000", "%5f", 3333.0);
}
void VsnprintfTestCase::G()
{
// NOTE: the same about E() testcase applies here...
CMP3(" 3.3", "%5g", 3.3);
CMP3(" 3", "%5g", 3.0);
CMP3("9.99999e-115", "%5g", .999999E-114);
CMP3("0.00099", "%5g", .99E-3);
CMP3(" 3333", "%5g", 3333.0);
CMP3(" 0.01", "%5g", 0.01);
CMP3(" 3", "%5.g", 3.3);
CMP3(" 3", "%5.g", 3.0);
CMP3("1e-114", "%5.g", .999999E-114);
CMP3("0.0001", "%5.g", 1.0E-4);
CMP3("0.001", "%5.g", .99E-3);
CMP3("3e+103", "%5.g", 3333.0E100);
CMP3(" 0.01", "%5.g", 0.01);
CMP3(" 3.3", "%5.2g", 3.3);
CMP3(" 3", "%5.2g", 3.0);
CMP3("1e-114", "%5.2g", .999999E-114);
CMP3("0.00099", "%5.2g", .99E-3);
CMP3("3.3e+103", "%5.2g", 3333.0E100);
CMP3(" 0.01", "%5.2g", 0.01);
}
void VsnprintfTestCase::S()
{
CMP3(" abc", "%5s", wxT("abc"));
CMP3(" a", "%5s", wxT("a"));
CMP3("abcdefghi", "%5s", wxT("abcdefghi"));
CMP3("abc ", "%-5s", wxT("abc"));
CMP3("abcdefghi", "%-5s", wxT("abcdefghi"));
CMP3("abcde", "%.5s", wxT("abcdefghi"));
// do the same tests but with Unicode characters:
#if wxUSE_UNICODE
// Unicode code points from U+03B1 to U+03B9 are the greek letters alpha-iota;
// UTF8 encoding of such code points is 0xCEB1 to 0xCEB9
#define ALPHA "\xCE\xB1"
// alpha
#define ABC "\xCE\xB1\xCE\xB2\xCE\xB3"
// alpha+beta+gamma
#define ABCDE "\xCE\xB1\xCE\xB2\xCE\xB3\xCE\xB4\xCE\xB5"
// alpha+beta+gamma+delta+epsilon
#define ABCDEFGHI "\xCE\xB1\xCE\xB2\xCE\xB3\xCE\xB4\xCE\xB5\xCE\xB6\xCE\xB7\xCE\xB8\xCE\xB9"
// alpha+beta+gamma+delta+epsilon+zeta+eta+theta+iota
// the 'expected' and 'arg' parameters of this macro are supposed to be
// UTF-8 strings
#define CMP3_UTF8(expected, fmt, arg) \
CPPUNIT_ASSERT_EQUAL \
( \
wxString::FromUTF8(expected).length(), \
wxSnprintf(buf, MAX_TEST_LEN, fmt, wxString::FromUTF8(arg)) \
); \
CPPUNIT_ASSERT_EQUAL \
( \
wxString::FromUTF8(expected), \
buf \
)
CMP3_UTF8(" " ABC, "%5s", ABC);
CMP3_UTF8(" " ALPHA, "%5s", ALPHA);
CMP3_UTF8(ABCDEFGHI, "%5s", ABCDEFGHI);
CMP3_UTF8(ABC " ", "%-5s", ABC);
CMP3_UTF8(ABCDEFGHI, "%-5s", ABCDEFGHI);
CMP3_UTF8(ABCDE, "%.5s", ABCDEFGHI);
#endif // wxUSE_UNICODE
// test a string which has a NULL character after "ab";
// obviously it should be handled exactly like just as "ab"
CMP3(" ab", "%5s", wxT("ab\0cdefghi"));
}
void VsnprintfTestCase::Asterisk()
{
CMP5(" 0.1", "%*.*f", 10, 1, 0.123);
CMP5(" 0.1230", "%*.*f", 10, 4, 0.123);
CMP5("0.1", "%*.*f", 3, 1, 0.123);
CMP4("%0.002", "%%%.*f", 3, 0.0023456789);
CMP4(" a", "%*c", 8, 'a');
CMP4(" four", "%*s", 8, "four");
CMP6(" four four", "%*s %*s", 8, "four", 6, "four");
}
void VsnprintfTestCase::Percent()
{
// some tests without any argument passed through ...
CMP2("%", "%%");
CMP2("%%%", "%%%%%%");
CMP3("% abc", "%%%5s", wxT("abc"));
CMP3("% abc%", "%%%5s%%", wxT("abc"));
// do not test odd number of '%' symbols as different implementations
// of snprintf() give different outputs as this situation is not considered
// by any standard (in fact, GCC will also warn you about a spurious % if
// you write %%% as argument of some *printf function !)
// Compare(wxT("%"), wxT("%%%"));
}
#ifdef wxLongLong_t
void VsnprintfTestCase::LongLong()
{
CMP3("123456789", "%lld", (wxLongLong_t)123456789);
CMP3("-123456789", "%lld", (wxLongLong_t)-123456789);
CMP3("123456789", "%llu", (wxULongLong_t)123456789);
#ifdef __WXMSW__
CMP3("123456789", "%I64d", (wxLongLong_t)123456789);
CMP3("123456789abcdef", "%I64x", wxLL(0x123456789abcdef));
#endif
}
#endif
// this test is only for our own implementation, the system implementation
// doesn't always give errors for invalid format strings (e.g. glibc doesn't)
// and as it's not required too (the behaviour is "undefined" according to the
// spec), there is really no sense in testing for it
#if wxUSE_WXVSNPRINTF
void VsnprintfTestCase::WrongFormatStrings()
{
// test how wxVsnprintf() behaves with wrong format string:
#if 0
// NB: the next 2 tests currently return an error but it would be nice
// if they didn't (see ticket #9367)
// two positionals with the same index:
r = wxSnprintf(buf, MAX_TEST_LEN, wxT("%1$s %1$s"), "hello");
CPPUNIT_ASSERT(r != -1);
// three positionals with the same index mixed with other pos args:
r = wxSnprintf(buf, MAX_TEST_LEN, wxT("%4$d %2$f %1$s %2$s %3$d"), "hello", "world", 3, 4);
CPPUNIT_ASSERT(r != -1);
#endif
// a missing positional arg: this should result in an error but not all
// implementations detect it (e.g. glibc doesn't)
r = wxSnprintf(buf, MAX_TEST_LEN, wxT("%1$d %3$d"), 1, 2, 3);
CPPUNIT_ASSERT_EQUAL(-1, r);
// positional and non-positionals in the same format string:
r = wxSnprintf(buf, MAX_TEST_LEN, wxT("%1$d %d %3$d"), 1, 2, 3);
CPPUNIT_ASSERT_EQUAL(-1, r);
}
#endif // wxUSE_WXVSNPRINTF
// BigToSmallBuffer() test case helper:
template<typename T>
void VsnprintfTestCase::DoBigToSmallBuffer(T *buffer, int size)
{
// Remember that wx*printf could be mapped either to system
// implementation or to wx implementation.
// In the first case, when the output buffer is too small, the returned
// value can be the number of characters required for the output buffer
// (conforming to ISO C99; implemented in e.g. GNU libc >= 2.1), or
// just a negative number, usually -1; (this is how e.g. MSVC's
// *printf() behaves). Luckily, in all implementations, when the
// output buffer is too small, it's nonetheless filled up to its max size.
//
// Note that in the second case (i.e. when we're using our own implementation),
// wxVsnprintf() will return the number of characters written in the standard
// output or
// -1 if there was an error in the format string
// maxSize+1 if the output buffer is too small
wxString errStr;
errStr << "The size of the buffer was " << size;
std::string errMsg(errStr.mb_str());
// test without positionals
CMPTOSIZE(buffer, size, errMsg,
"123456789012 - test - 123 -4.567",
"%i%li - test - %d %.3f",
123, (long int)456789012, 123, -4.567);
#if wxUSE_PRINTF_POS_PARAMS
// test with positional
CMPTOSIZE(buffer, size, errMsg,
"-4.567 123 - test - 456789012 123",
"%4$.3f %1$i - test - %2$li %3$d",
123, (long int)456789012, 123, -4.567);
#endif
// test unicode/ansi conversion specifiers
//
// NB: we use wxUnsafeSnprintf() as %hs and %hc are invalid in printf
// format and gcc would warn about this otherwise
r = wxUnsafeSnprintf(buffer, size,
wxT("unicode string/char: %ls/%lc -- ansi string/char: %hs/%hc"),
L"unicode", L'U', "ansi", 'A');
wxString expected =
wxString(wxT("unicode string/char: unicode/U -- ansi string/char: ansi/A")).Left(size - 1);
CPPUNIT_ASSERT( r != -1 );
CPPUNIT_ASSERT_EQUAL(
expected,
wxString(buffer)
);
}
void VsnprintfTestCase::BigToSmallBuffer()
{
// VC6 can't compile this code
#if !defined(__VISUALC__) || (__VISUALC__ >= 1310)
#if wxUSE_UNICODE
wchar_t bufw[1024], bufw2[16], bufw3[4], bufw4;
DoBigToSmallBuffer(bufw, 1024);
DoBigToSmallBuffer(bufw2, 16);
DoBigToSmallBuffer(bufw3, 4);
DoBigToSmallBuffer(&bufw4, 1);
#endif // wxUSE_UNICODE
char bufa[1024], bufa2[16], bufa3[4], bufa4;
DoBigToSmallBuffer(bufa, 1024);
DoBigToSmallBuffer(bufa2, 16);
DoBigToSmallBuffer(bufa3, 4);
DoBigToSmallBuffer(&bufa4, 1);
#endif // !VC6
}
// Miscellaneous() test case helper:
void VsnprintfTestCase::DoMisc(
int expectedLen,
const wxString& expectedString,
size_t max,
const wxChar *format, ...)
{
const size_t BUFSIZE = MAX_TEST_LEN - 1;
size_t i;
static int count = 0;
wxASSERT(max <= BUFSIZE);
for (i = 0; i < BUFSIZE; i++)
buf[i] = '*';
buf[BUFSIZE] = 0;
va_list ap;
va_start(ap, format);
int n = wxVsnprintf(buf, max, format, ap);
va_end(ap);
// Prepare messages so that it is possible to see from the error which
// test was running.
wxString errStr, overflowStr;
errStr << wxT("No.: ") << ++count << wxT(", expected: ") << expectedLen
<< wxT(" '") << expectedString << wxT("', result: ");
overflowStr << errStr << wxT("buffer overflow");
errStr << n << wxT(" '") << buf << wxT("'");
// turn them into std::strings
std::string errMsg(errStr.mb_str());
std::string overflowMsg(overflowStr.mb_str());
CPPUNIT_ASSERT_MESSAGE(errMsg,
(expectedLen == -1 && size_t(n) >= max) || expectedLen == n);
CPPUNIT_ASSERT_MESSAGE(errMsg, expectedString == buf);
for (i = max; i < BUFSIZE; i++)
CPPUNIT_ASSERT_MESSAGE(overflowMsg, buf[i] == '*');
}
void VsnprintfTestCase::Miscellaneous()
{
// expectedLen, expectedString, max, format, ...
DoMisc(5, wxT("-1234"), 8, wxT("%d"), -1234);
DoMisc(7, wxT("1234567"), 8, wxT("%d"), 1234567);
DoMisc(-1, wxT("1234567"), 8, wxT("%d"), 12345678);
DoMisc(-1, wxT("-123456"), 8, wxT("%d"), -1234567890);
DoMisc(6, wxT("123456"), 8, wxT("123456"));
DoMisc(7, wxT("1234567"), 8, wxT("1234567"));
DoMisc(-1, wxT("1234567"), 8, wxT("12345678"));
DoMisc(6, wxT("123450"), 8, wxT("12345%d"), 0);
DoMisc(7, wxT("1234560"), 8, wxT("123456%d"), 0);
DoMisc(-1, wxT("1234567"), 8, wxT("1234567%d"), 0);
DoMisc(-1, wxT("1234567"), 8, wxT("12345678%d"), 0);
DoMisc(6, wxT("12%45%"), 8, wxT("12%%45%%"));
DoMisc(7, wxT("12%45%7"), 8, wxT("12%%45%%7"));
DoMisc(-1, wxT("12%45%7"), 8, wxT("12%%45%%78"));
DoMisc(5, wxT("%%%%%"), 6, wxT("%%%%%%%%%%"));
DoMisc(6, wxT("%%%%12"), 7, wxT("%%%%%%%%%d"), 12);
}
/* (C) Copyright C E Chew
*
* Feel free to copy, use and distribute this software provided:
*
* 1. you do not pretend that you wrote it
* 2. you leave this copyright notice intact.
*/
void VsnprintfTestCase::GlibcMisc1()
{
CMP3(" ", "%5.s", "xyz");
CMP3(" 33", "%5.f", 33.3);
#if defined(__VISUALC__)
// see the previous notes about the minimum width of mantissa:
CMP3(" 3e+008", "%8.e", 33.3e7);
CMP3(" 3E+008", "%8.E", 33.3e7);
CMP3("3e+001", "%.g", 33.3);
CMP3("3E+001", "%.G", 33.3);
#else
CMP3(" 3e+08", "%8.e", 33.3e7);
CMP3(" 3E+08", "%8.E", 33.3e7);
CMP3("3e+01", "%.g", 33.3);
CMP3("3E+01", "%.G", 33.3);
#endif
}
void VsnprintfTestCase::GlibcMisc2()
{
int prec;
wxString test_format;
prec = 0;
CMP4("3", "%.*g", prec, 3.3);
prec = 0;
CMP4("3", "%.*G", prec, 3.3);
prec = 0;
CMP4(" 3", "%7.*G", prec, 3.33);
prec = 3;
CMP4(" 041", "%04.*o", prec, 33);
prec = 7;
CMP4(" 0000033", "%09.*u", prec, 33);
prec = 3;
CMP4(" 021", "%04.*x", prec, 33);
prec = 3;
CMP4(" 021", "%04.*X", prec, 33);
}
#endif // wxUSE_WXVSNPRINTF
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