#include <string.h>
#include <stdlib.h>
-#ifdef __SALFORDC__
- #include <clib.h>
-#endif
-
#include "wx/hashmap.h"
+#include "wx/vector.h"
+#include "wx/xlocale.h"
// string handling functions used by wxString:
#if wxUSE_UNICODE_UTF8
#define wxStringStrlen wxStrlen
#endif
+// ----------------------------------------------------------------------------
+// global variables
+// ----------------------------------------------------------------------------
+
+namespace wxPrivate
+{
+
+static UntypedBufferData s_untypedNullData(NULL);
+
+UntypedBufferData * const untypedNullDataPtr = &s_untypedNullData;
+
+} // namespace wxPrivate
// ---------------------------------------------------------------------------
// static class variables definition
//According to STL _must_ be a -1 size_t
const size_t wxString::npos = (size_t) -1;
+#if wxUSE_STRING_POS_CACHE
+
+#ifdef wxHAS_COMPILER_TLS
+
+wxTLS_TYPE(wxString::Cache) wxString::ms_cache;
+
+#else // !wxHAS_COMPILER_TLS
+
+struct wxStrCacheInitializer
+{
+ wxStrCacheInitializer()
+ {
+ // calling this function triggers s_cache initialization in it, and
+ // from now on it becomes safe to call from multiple threads
+ wxString::GetCache();
+ }
+};
+
+/*
+wxString::Cache& wxString::GetCache()
+{
+ static wxTLS_TYPE(Cache) s_cache;
+
+ return wxTLS_VALUE(s_cache);
+}
+*/
+
+static wxStrCacheInitializer gs_stringCacheInit;
+
+#endif // wxHAS_COMPILER_TLS/!wxHAS_COMPILER_TLS
+
+// gdb seems to be unable to display thread-local variables correctly, at least
+// not my 6.4.98 version under amd64, so provide this debugging helper to do it
+#ifdef __WXDEBUG__
+
+struct wxStrCacheDumper
+{
+ static void ShowAll()
+ {
+ puts("*** wxString cache dump:");
+ for ( unsigned n = 0; n < wxString::Cache::SIZE; n++ )
+ {
+ const wxString::Cache::Element&
+ c = wxString::GetCacheBegin()[n];
+
+ printf("\t%u%s\t%p: pos=(%lu, %lu), len=%ld\n",
+ n,
+ n == wxString::LastUsedCacheElement() ? " [*]" : "",
+ c.str,
+ (unsigned long)c.pos,
+ (unsigned long)c.impl,
+ (long)c.len);
+ }
+ }
+};
+
+void wxDumpStrCache() { wxStrCacheDumper::ShowAll(); }
+
+#endif // __WXDEBUG__
+
+#ifdef wxPROFILE_STRING_CACHE
+
+wxString::CacheStats wxString::ms_cacheStats;
+
+struct wxStrCacheStatsDumper
+{
+ ~wxStrCacheStatsDumper()
+ {
+ const wxString::CacheStats& stats = wxString::ms_cacheStats;
+
+ if ( stats.postot )
+ {
+ puts("*** wxString cache statistics:");
+ printf("\tTotal non-trivial calls to PosToImpl(): %u\n",
+ stats.postot);
+ printf("\tHits %u (of which %u not used) or %.2f%%\n",
+ stats.poshits,
+ stats.mishits,
+ 100.*float(stats.poshits - stats.mishits)/stats.postot);
+ printf("\tAverage position requested: %.2f\n",
+ float(stats.sumpos) / stats.postot);
+ printf("\tAverage offset after cached hint: %.2f\n",
+ float(stats.sumofs) / stats.postot);
+ }
+
+ if ( stats.lentot )
+ {
+ printf("\tNumber of calls to length(): %u, hits=%.2f%%\n",
+ stats.lentot, 100.*float(stats.lenhits)/stats.lentot);
+ }
+ }
+};
+
+static wxStrCacheStatsDumper s_showCacheStats;
+
+#endif // wxPROFILE_STRING_CACHE
+
+#endif // wxUSE_STRING_POS_CACHE
+
// ----------------------------------------------------------------------------
// global functions
// ----------------------------------------------------------------------------
wxSTD ostream& operator<<(wxSTD ostream& os, const wxCStrData& str)
{
-// FIXME-UTF8: always, not only if wxUSE_UNICODE
-#if wxUSE_UNICODE && !defined(__BORLANDC__)
- return os << (const wchar_t*)str.AsWCharBuf();
+#if wxUSE_UNICODE && !wxUSE_UNICODE_UTF8
+ const wxCharBuffer buf(str.AsCharBuf());
+ if ( !buf )
+ os.clear(wxSTD ios_base::failbit);
+ else
+ os << buf.data();
+
+ return os;
#else
- return os << (const char*)str.AsCharBuf();
+ return os << str.AsInternal();
#endif
}
}
#endif
+#if wxUSE_UNICODE && defined(HAVE_WOSTREAM)
+
+wxSTD wostream& operator<<(wxSTD wostream& wos, const wxString& str)
+{
+ return wos << str.wc_str();
+}
+
+wxSTD wostream& operator<<(wxSTD wostream& wos, const wxCStrData& str)
+{
+ return wos << str.AsWChar();
+}
+
+wxSTD wostream& operator<<(wxSTD wostream& wos, const wxWCharBuffer& str)
+{
+ return wos << str.data();
+}
+
+#endif // wxUSE_UNICODE && defined(HAVE_WOSTREAM)
+
#endif // wxUSE_STD_IOSTREAM
// ===========================================================================
size_t *implPos, size_t *implLen) const
{
if ( pos == npos )
+ {
*implPos = npos;
- else
+ }
+ else // have valid start position
{
- const_iterator i = begin() + pos;
- *implPos = wxStringImpl::const_iterator(i.impl()) - m_impl.begin();
+ const const_iterator b = GetIterForNthChar(pos);
+ *implPos = wxStringImpl::const_iterator(b.impl()) - m_impl.begin();
if ( len == npos )
+ {
*implLen = npos;
- else
+ }
+ else // have valid length too
{
- // too large length is interpreted as "to the end of the string"
- // FIXME-UTF8: verify this is the case in std::string, assert
- // otherwise
- if ( pos + len > length() )
- len = length() - pos;
-
- *implLen = (i + len).impl() - i.impl();
+ // we need to handle the case of length specifying a substring
+ // going beyond the end of the string, just as std::string does
+ const const_iterator e(end());
+ const_iterator i(b);
+ while ( len && i <= e )
+ {
+ ++i;
+ --len;
+ }
+
+ *implLen = i.impl() - b.impl();
}
}
}
wxString *str = wxConstCast(m_str, wxString);
// convert the string:
+ //
+ // FIXME-UTF8: we'd like to do the conversion in the existing buffer (if we
+ // have it) but it's unfortunately not obvious to implement
+ // because we don't know how big buffer do we need for the
+ // given string length (in case of multibyte encodings, e.g.
+ // ISO-2022-JP or UTF-8 when internal representation is wchar_t)
+ //
+ // One idea would be to store more than just m_convertedToChar
+ // in wxString: then we could record the length of the string
+ // which was converted the last time and try to reuse the same
+ // buffer if the current length is not greater than it (this
+ // could still fail because string could have been modified in
+ // place but it would work most of the time, so we'd do it and
+ // only allocate the new buffer if in-place conversion returned
+ // an error). We could also store a bit saying if the string
+ // was modified since the last conversion (and update it in all
+ // operation modifying the string, of course) to avoid unneeded
+ // consequential conversions. But both of these ideas require
+ // adding more fields to wxString and require profiling results
+ // to be sure that we really gain enough from them to justify
+ // doing it.
wxCharBuffer buf(str->mb_str());
- // FIXME-UTF8: do the conversion in-place in the existing buffer
+ // if it failed, return empty string and not NULL to avoid crashes in code
+ // written with either wxWidgets 2 wxString or std::string behaviour in
+ // mind: neither of them ever returns NULL and so we shouldn't neither
+ if ( !buf )
+ return "";
+
if ( str->m_convertedToChar &&
strlen(buf) == strlen(str->m_convertedToChar) )
{
// convert the string:
wxWCharBuffer buf(str->wc_str());
+ // notice that here, unlike above in AsChar(), conversion can't fail as our
+ // internal UTF-8 is always well-formed -- or the string was corrupted and
+ // all bets are off anyhow
+
// FIXME-UTF8: do the conversion in-place in the existing buffer
if ( str->m_convertedToWChar &&
wxWcslen(buf) == wxWcslen(str->m_convertedToWChar) )
// UTF-8 sequence and psz may be invalid:
if ( wxStringOperations::IsValidUtf8String(psz, nLength) )
{
+ // we must pass the real string length to SubstrBufFromMB ctor
+ if ( nLength == npos )
+ nLength = psz ? strlen(psz) : 0;
return SubstrBufFromMB(wxCharBuffer::CreateNonOwned(psz), nLength);
}
// else: do the roundtrip through wchar_t*
return SubstrBufFromMB("", 0);
// and then to UTF-8:
- SubstrBufFromMB buf(ConvertStr(wcBuf, wcLen, wxMBConvUTF8()));
+ SubstrBufFromMB buf(ConvertStr(wcBuf, wcLen, wxMBConvStrictUTF8()));
// widechar -> UTF-8 conversion isn't supposed to ever fail:
wxASSERT_MSG( buf.data, _T("conversion to UTF-8 failed") );
const wxWCharBuffer wxString::wc_str() const
{
- return wxMBConvUTF8().cMB2WC(m_impl.c_str(),
- m_impl.length() + 1 /* size, not length */,
- NULL);
+ return wxMBConvStrictUTF8().cMB2WC
+ (
+ m_impl.c_str(),
+ m_impl.length() + 1, // size, not length
+ NULL
+ );
}
const wxCharBuffer wxString::mb_str(const wxMBConv& conv) const
// FIXME-UTF8: use wc_str() here once we have buffers with length
size_t wcLen;
- wxWCharBuffer wcBuf(
- wxMBConvUTF8().cMB2WC(m_impl.c_str(),
- m_impl.length() + 1 /* size, not length */,
- &wcLen));
+ wxWCharBuffer wcBuf(wxMBConvStrictUTF8().cMB2WC
+ (
+ m_impl.c_str(),
+ m_impl.length() + 1, // size
+ &wcLen
+ ));
if ( !wcLen )
return wxCharBuffer("");
- return conv.cWC2MB(wcBuf, wcLen, NULL);
+ return conv.cWC2MB(wcBuf, wcLen+1, NULL);
}
#else // ANSI
int wxString::CmpNoCase(const wxString& s) const
{
+#if wxUSE_UNICODE_UTF8
// FIXME-UTF8: use wxUniChar::ToLower/ToUpper once added
- size_t idx = 0;
const_iterator i1 = begin();
const_iterator end1 = end();
const_iterator i2 = s.begin();
const_iterator end2 = s.end();
- for ( ; i1 != end1 && i2 != end2; ++idx, ++i1, ++i2 )
+ for ( ; i1 != end1 && i2 != end2; ++i1, ++i2 )
{
wxUniChar lower1 = (wxChar)wxTolower(*i1);
wxUniChar lower2 = (wxChar)wxTolower(*i2);
else if ( len1 > len2 )
return 1;
return 0;
+#else // wxUSE_UNICODE_WCHAR or ANSI
+ return wxStricmp(m_impl.c_str(), s.m_impl.c_str());
+#endif
}
wxString res;
{
- wxImplStringBuffer buf(res, len);
+ wxStringInternalBuffer buf(res, len);
wxStringCharType *dest = buf;
for ( ; len > 0; --len )
wxString wxString::FromAscii(const char *ascii)
{
- return FromAscii(ascii, strlen(ascii));
+ return FromAscii(ascii, wxStrlen(ascii));
}
-wxString wxString::FromAscii(const char ascii)
+wxString wxString::FromAscii(char ascii)
{
// What do we do with '\0' ?
return dest;
}
-// get all characters after the last occurence of ch
+// get all characters after the last occurrence of ch
// (returns the whole string if ch not found)
wxString wxString::AfterLast(wxUniChar ch) const
{
if ( iPos == wxNOT_FOUND )
str = *this;
else
- str = wx_str() + iPos + 1;
+ str.assign(*this, iPos + 1, npos);
return str;
}
return dest;
}
-// get all characters before the first occurence of ch
+// get all characters before the first occurrence of ch
// (returns the whole string if ch not found)
wxString wxString::BeforeFirst(wxUniChar ch) const
{
int iPos = Find(ch);
- if ( iPos == wxNOT_FOUND ) iPos = length();
+ if ( iPos == wxNOT_FOUND )
+ iPos = length();
return wxString(*this, 0, iPos);
}
-/// get all characters before the last occurence of ch
+/// get all characters before the last occurrence of ch
/// (returns empty string if ch not found)
wxString wxString::BeforeLast(wxUniChar ch) const
{
return str;
}
-/// get all characters after the first occurence of ch
+/// get all characters after the first occurrence of ch
/// (returns empty string if ch not found)
wxString wxString::AfterFirst(wxUniChar ch) const
{
wxString str;
int iPos = Find(ch);
if ( iPos != wxNOT_FOUND )
- str = wx_str() + iPos + 1;
+ str.assign(*this, iPos + 1, npos);
return str;
}
-// replace first (or all) occurences of some substring with another one
+// replace first (or all) occurrences of some substring with another one
size_t wxString::Replace(const wxString& strOld,
const wxString& strNew, bool bReplaceAll)
{
wxCHECK_MSG( !strOld.empty(), 0,
_T("wxString::Replace(): invalid parameter") );
+ wxSTRING_INVALIDATE_CACHE();
+
size_t uiCount = 0; // count of replacements made
- size_t uiOldLen = strOld.length();
- size_t uiNewLen = strNew.length();
+ // optimize the special common case: replacement of one character by
+ // another one (in UTF-8 case we can only do this for ASCII characters)
+ //
+ // benchmarks show that this special version is around 3 times faster
+ // (depending on the proportion of matching characters and UTF-8/wchar_t
+ // build)
+ if ( strOld.m_impl.length() == 1 && strNew.m_impl.length() == 1 )
+ {
+ const wxStringCharType chOld = strOld.m_impl[0],
+ chNew = strNew.m_impl[0];
+
+ // this loop is the simplified version of the one below
+ for ( size_t pos = 0; ; )
+ {
+ pos = m_impl.find(chOld, pos);
+ if ( pos == npos )
+ break;
+
+ m_impl[pos++] = chNew;
- size_t dwPos = 0;
+ uiCount++;
- while ( (*this)[dwPos] != wxT('\0') )
+ if ( !bReplaceAll )
+ break;
+ }
+ }
+ else if ( !bReplaceAll)
{
- //DO NOT USE STRSTR HERE
- //this string can contain embedded null characters,
- //so strstr will function incorrectly
- dwPos = find(strOld, dwPos);
- if ( dwPos == npos )
- break; // exit the loop
- else
+ size_t pos = m_impl.find(strOld, 0);
+ if ( pos != npos )
{
- //replace this occurance of the old string with the new one
- replace(dwPos, uiOldLen, strNew, uiNewLen);
+ m_impl.replace(pos, strOld.m_impl.length(), strNew.m_impl);
+ uiCount = 1;
+ }
+ }
+ else // replace all occurrences
+ {
+ const size_t uiOldLen = strOld.m_impl.length();
+ const size_t uiNewLen = strNew.m_impl.length();
- //move up pos past the string that was replaced
- dwPos += uiNewLen;
+ // first scan the string to find all positions at which the replacement
+ // should be made
+ wxVector<size_t> replacePositions;
- //increase replace count
+ size_t pos;
+ for ( pos = m_impl.find(strOld.m_impl, 0);
+ pos != npos;
+ pos = m_impl.find(strOld.m_impl, pos + uiOldLen))
+ {
+ replacePositions.push_back(pos);
++uiCount;
+ }
- // stop now?
- if ( !bReplaceAll )
- break; // exit the loop
+ if ( !uiCount )
+ return 0;
+
+ // allocate enough memory for the whole new string
+ wxString tmp;
+ tmp.m_impl.reserve(m_impl.length() + uiCount*(uiNewLen - uiOldLen));
+
+ // copy this string to tmp doing replacements on the fly
+ size_t replNum = 0;
+ for ( pos = 0; replNum < uiCount; replNum++ )
+ {
+ const size_t nextReplPos = replacePositions[replNum];
+
+ if ( pos != nextReplPos )
+ {
+ tmp.m_impl.append(m_impl, pos, nextReplPos - pos);
+ }
+
+ tmp.m_impl.append(strNew.m_impl);
+ pos = nextReplPos + uiOldLen;
}
+
+ if ( pos != m_impl.length() )
+ {
+ // append the rest of the string unchanged
+ tmp.m_impl.append(m_impl, pos, m_impl.length() - pos);
+ }
+
+ swap(tmp);
}
return uiCount;
return *this;
}
+wxString& wxString::MakeCapitalized()
+{
+ const iterator en = end();
+ iterator it = begin();
+ if ( it != en )
+ {
+ *it = (wxChar)wxToupper(*it);
+ for ( ++it; it != en; ++it )
+ *it = (wxChar)wxTolower(*it);
+ }
+
+ return *this;
+}
+
// ---------------------------------------------------------------------------
// trimming and padding
// ---------------------------------------------------------------------------
// some compilers (VC++ 6.0 not to name them) return true for a call to
-// isspace('ê') in the C locale which seems to be broken to me, but we have to
-// live with this by checking that the character is a 7 bit one - even if this
-// may fail to detect some spaces (I don't know if Unicode doesn't have
+// isspace('\xEA') in the C locale which seems to be broken to me, but we have
+// to live with this by checking that the character is a 7 bit one - even if
+// this may fail to detect some spaces (I don't know if Unicode doesn't have
// space-like symbols somewhere except in the first 128 chars), it is arguably
// still better than trimming away accented letters
inline int wxSafeIsspace(wxChar ch) { return (ch < 127) && wxIsspace(ch); }
// find last non-space character
reverse_iterator psz = rbegin();
while ( (psz != rend()) && wxSafeIsspace(*psz) )
- psz++;
+ ++psz;
// truncate at trailing space start
erase(psz.base(), end());
// find first non-space character
iterator psz = begin();
while ( (psz != end()) && wxSafeIsspace(*psz) )
- psz++;
+ ++psz;
// fix up data and length
erase(begin(), psz);
// it out. Note that number extraction works correctly on UTF-8 strings, so
// we can use wxStringCharType and wx_str() for maximum efficiency.
-template <typename T>
-bool wxStringToIntType(const wxStringCharType *start,
- T *val,
- int base,
- T (*func)(const wxStringCharType*, wxStringCharType**, int))
-{
- wxCHECK_MSG( val, false, _T("NULL output pointer") );
- wxASSERT_MSG( !base || (base > 1 && base <= 36), _T("invalid base") );
-
#ifndef __WXWINCE__
- errno = 0;
+ #define DO_IF_NOT_WINCE(x) x
+#else
+ #define DO_IF_NOT_WINCE(x)
#endif
+#define WX_STRING_TO_X_TYPE_START \
+ wxCHECK_MSG( pVal, false, _T("NULL output pointer") ); \
+ DO_IF_NOT_WINCE( errno = 0; ) \
+ const wxStringCharType *start = wx_str(); \
wxStringCharType *end;
- *val = (*func)(start, &end, base);
- // return true only if scan was stopped by the terminating NUL and if the
- // string was not empty to start with and no under/overflow occurred
- return !*end && (end != start)
-#ifndef __WXWINCE__
- && (errno != ERANGE)
-#endif
- ;
+#define WX_STRING_TO_X_TYPE_END \
+ /* return true only if scan was stopped by the terminating NUL and */ \
+ /* if the string was not empty to start with and no under/overflow */ \
+ /* occurred: */ \
+ if ( *end || end == start DO_IF_NOT_WINCE(|| errno == ERANGE) ) \
+ return false; \
+ *pVal = val; \
+ return true;
+
+bool wxString::ToLong(long *pVal, int base) const
+{
+ wxASSERT_MSG( !base || (base > 1 && base <= 36), _T("invalid base") );
+
+ WX_STRING_TO_X_TYPE_START
+ long val = wxStrtol(start, &end, base);
+ WX_STRING_TO_X_TYPE_END
}
-bool wxString::ToLong(long *val, int base) const
+bool wxString::ToULong(unsigned long *pVal, int base) const
{
- return wxStringToIntType(wx_str(), val, base, wxStrtol);
+ wxASSERT_MSG( !base || (base > 1 && base <= 36), _T("invalid base") );
+
+ WX_STRING_TO_X_TYPE_START
+ unsigned long val = wxStrtoul(start, &end, base);
+ WX_STRING_TO_X_TYPE_END
}
-bool wxString::ToULong(unsigned long *val, int base) const
+bool wxString::ToLongLong(wxLongLong_t *pVal, int base) const
{
- return wxStringToIntType(wx_str(), val, base, wxStrtoul);
+ wxASSERT_MSG( !base || (base > 1 && base <= 36), _T("invalid base") );
+
+ WX_STRING_TO_X_TYPE_START
+ wxLongLong_t val = wxStrtoll(start, &end, base);
+ WX_STRING_TO_X_TYPE_END
}
-bool wxString::ToLongLong(wxLongLong_t *val, int base) const
+bool wxString::ToULongLong(wxULongLong_t *pVal, int base) const
{
- return wxStringToIntType(wx_str(), val, base, wxStrtoll);
+ wxASSERT_MSG( !base || (base > 1 && base <= 36), _T("invalid base") );
+
+ WX_STRING_TO_X_TYPE_START
+ wxULongLong_t val = wxStrtoull(start, &end, base);
+ WX_STRING_TO_X_TYPE_END
}
-bool wxString::ToULongLong(wxULongLong_t *val, int base) const
+bool wxString::ToDouble(double *pVal) const
{
- return wxStringToIntType(wx_str(), val, base, wxStrtoull);
+ WX_STRING_TO_X_TYPE_START
+ double val = wxStrtod(start, &end);
+ WX_STRING_TO_X_TYPE_END
}
-bool wxString::ToDouble(double *val) const
+#if wxUSE_XLOCALE
+
+bool wxString::ToCLong(long *pVal, int base) const
{
- wxCHECK_MSG( val, false, _T("NULL pointer in wxString::ToDouble") );
+ wxASSERT_MSG( !base || (base > 1 && base <= 36), _T("invalid base") );
-#ifndef __WXWINCE__
- errno = 0;
+ WX_STRING_TO_X_TYPE_START
+#if wxUSE_UNICODE_UTF8 || !wxUSE_UNICODE
+ long val = wxStrtol_lA(start, &end, base, wxCLocale);
+#else
+ long val = wxStrtol_l(start, &end, base, wxCLocale);
#endif
+ WX_STRING_TO_X_TYPE_END
+}
- const wxChar *start = c_str();
- wxChar *end;
- *val = wxStrtod(start, &end);
+bool wxString::ToCULong(unsigned long *pVal, int base) const
+{
+ wxASSERT_MSG( !base || (base > 1 && base <= 36), _T("invalid base") );
- // return true only if scan was stopped by the terminating NUL and if the
- // string was not empty to start with and no under/overflow occurred
- return !*end && (end != start)
-#ifndef __WXWINCE__
- && (errno != ERANGE)
+ WX_STRING_TO_X_TYPE_START
+#if wxUSE_UNICODE_UTF8 || !wxUSE_UNICODE
+ unsigned long val = wxStrtoul_lA(start, &end, base, wxCLocale);
+#else
+ unsigned long val = wxStrtoul_l(start, &end, base, wxCLocale);
+#endif
+ WX_STRING_TO_X_TYPE_END
+}
+
+bool wxString::ToCDouble(double *pVal) const
+{
+ WX_STRING_TO_X_TYPE_START
+#if wxUSE_UNICODE_UTF8 || !wxUSE_UNICODE
+ double val = wxStrtod_lA(start, &end, wxCLocale);
+#else
+ double val = wxStrtod_l(start, &end, wxCLocale);
#endif
- ;
+ WX_STRING_TO_X_TYPE_END
}
+#endif // wxUSE_XLOCALE
+
// ---------------------------------------------------------------------------
// formatted output
// ---------------------------------------------------------------------------
}
#endif // wxUSE_UNICODE_UTF8
+/*
+ Uses wxVsnprintf and places the result into the this string.
+
+ In ANSI build, wxVsnprintf is effectively vsnprintf but in Unicode build
+ it is vswprintf. Due to a discrepancy between vsnprintf and vswprintf in
+ the ISO C99 (and thus SUSv3) standard the return value for the case of
+ an undersized buffer is inconsistent. For conforming vsnprintf
+ implementations the function must return the number of characters that
+ would have been printed had the buffer been large enough. For conforming
+ vswprintf implementations the function must return a negative number
+ and set errno.
+
+ What vswprintf sets errno to is undefined but Darwin seems to set it to
+ EOVERFLOW. The only expected errno are EILSEQ and EINVAL. Both of
+ those are defined in the standard and backed up by several conformance
+ statements. Note that ENOMEM mentioned in the manual page does not
+ apply to swprintf, only wprintf and fwprintf.
+
+ Official manual page:
+ http://www.opengroup.org/onlinepubs/009695399/functions/swprintf.html
+
+ Some conformance statements (AIX, Solaris):
+ http://www.opengroup.org/csq/view.mhtml?RID=ibm%2FSD1%2F3
+ http://www.theopengroup.org/csq/view.mhtml?norationale=1&noreferences=1&RID=Fujitsu%2FSE2%2F10
+
+ Since EILSEQ and EINVAL are rather common but EOVERFLOW is not and since
+ EILSEQ and EINVAL are specifically defined to mean the error is other than
+ an undersized buffer and no other errno are defined we treat those two
+ as meaning hard errors and everything else gets the old behavior which
+ is to keep looping and increasing buffer size until the function succeeds.
+
+ In practice it's impossible to determine before compilation which behavior
+ may be used. The vswprintf function may have vsnprintf-like behavior or
+ vice-versa. Behavior detected on one release can theoretically change
+ with an updated release. Not to mention that configure testing for it
+ would require the test to be run on the host system, not the build system
+ which makes cross compilation difficult. Therefore, we make no assumptions
+ about behavior and try our best to handle every known case, including the
+ case where wxVsnprintf returns a negative number and fails to set errno.
+
+ There is yet one more non-standard implementation and that is our own.
+ Fortunately, that can be detected at compile-time.
+
+ On top of all that, ISO C99 explicitly defines snprintf to write a null
+ character to the last position of the specified buffer. That would be at
+ at the given buffer size minus 1. It is supposed to do this even if it
+ turns out that the buffer is sized too small.
+
+ Darwin (tested on 10.5) follows the C99 behavior exactly.
+
+ Glibc 2.6 almost follows the C99 behavior except vswprintf never sets
+ errno even when it fails. However, it only seems to ever fail due
+ to an undersized buffer.
+*/
#if wxUSE_UNICODE_UTF8
template<typename BufferType>
#else
// only a copy
va_list argptrcopy;
wxVaCopy(argptrcopy, argptr);
+
+#ifndef __WXWINCE__
+ // Set errno to 0 to make it determinate if wxVsnprintf fails to set it.
+ errno = 0;
+#endif
int len = wxVsnprintf(buf, size, format, argptrcopy);
va_end(argptrcopy);
// some implementations of vsnprintf() don't NUL terminate
// the string if there is not enough space for it so
// always do it manually
+ // FIXME: This really seems to be the wrong and would be an off-by-one
+ // bug except the code above allocates an extra character.
buf[size] = _T('\0');
// vsnprintf() may return either -1 (traditional Unix behaviour) or the
// assume it only returns error if there is not enough space, but
// as we don't know how much we need, double the current size of
// the buffer
- size *= 2;
+#ifndef __WXWINCE__
+ if( (errno == EILSEQ) || (errno == EINVAL) )
+ // If errno was set to one of the two well-known hard errors
+ // then fail immediately to avoid an infinite loop.
+ return -1;
+ else
+#endif // __WXWINCE__
+ // still not enough, as we don't know how much we need, double the
+ // current size of the buffer
+ size *= 2;
#endif // wxUSE_WXVSNPRINTF/!wxUSE_WXVSNPRINTF
}
else if ( len >= size )
{
#if wxUSE_WXVSNPRINTF
- // we know that our own implementation of wxVsnprintf() returns
+ // we know that our own implementation of wxVsnprintf() returns
// size+1 when there's not enough space but that's not the size
// of the required buffer!
size *= 2; // so we just double the current size of the buffer
#else
// some vsnprintf() implementations NUL-terminate the buffer and
// some don't in len == size case, to be safe always add 1
+ // FIXME: I don't quite understand this comment. The vsnprintf
+ // function is specifically defined to return the number of
+ // characters printed not including the null terminator.
+ // So OF COURSE you need to add 1 to get the right buffer size.
+ // The following line is definitely correct, no question.
size = len + 1;
#endif
}
#if wxUSE_STL_BASED_WXSTRING
typedef wxStringTypeBuffer<char> Utf8Buffer;
#else
- typedef wxImplStringBuffer Utf8Buffer;
+ typedef wxStringInternalBuffer Utf8Buffer;
#endif
#endif
return count;
}
-// convert to upper case, return the copy of the string
-wxString wxString::Upper() const
-{ wxString s(*this); return s.MakeUpper(); }
-
-// convert to lower case, return the copy of the string
-wxString wxString::Lower() const { wxString s(*this); return s.MakeLower(); }
projects / wxWidgets.git / blobdiff