#endif
#ifndef WX_PRECOMP
-#include "wx/defs.h"
-#include "wx/string.h"
-#include <wx/intl.h>
+ #include "wx/defs.h"
+ #include "wx/string.h"
+ #include "wx/intl.h"
#endif
#include <ctype.h>
#include <string.h>
#include <stdlib.h>
+#ifdef wxUSE_WCSRTOMBS
+ #include <wchar.h> // for wcsrtombs(), see comments where it's used
+#endif // GNU
+
#ifdef WXSTRING_IS_WXOBJECT
IMPLEMENT_DYNAMIC_CLASS(wxString, wxObject)
#endif //WXSTRING_IS_WXOBJECT
// static data
// ----------------------------------------------------------------------------
-// for an empty string, GetStringData() will return this address
-static int g_strEmpty[] = { -1, // ref count (locked)
- 0, // current length
- 0, // allocated memory
- 0 }; // string data
+// for an empty string, GetStringData() will return this address: this
+// structure has the same layout as wxStringData and it's data() method will
+// return the empty string (dummy pointer)
+static const struct
+{
+ wxStringData data;
+ char dummy;
+} g_strEmpty = { {-1, 0, 0}, '\0' };
+
// empty C style string: points to 'string data' byte of g_strEmpty
-extern const char *g_szNul = (const char *)(&g_strEmpty[3]);
+extern const char *g_szNul = &g_strEmpty.dummy;
// ----------------------------------------------------------------------------
// global functions
// iostream ones.
//
// ATTN: you can _not_ use both of these in the same program!
-#if 0 // def _MSC_VER
- #include <iostream>
- #define NAMESPACE std::
+#if wxUSE_IOSTREAMH
+#include <iostream.h>
+#define NAMESPACE
#else
- #include <iostream.h>
- #define NAMESPACE
-#endif //Visual C++
+#include <iostream>
+# ifdef _MSC_VER
+ using namespace std;
+# endif
+// for msvc (bcc50+ also) you don't need these NAMESPACE defines,
+// using namespace std; takes care of that.
+#define NAMESPACE std::
+#endif
+
NAMESPACE istream& operator>>(NAMESPACE istream& is, wxString& WXUNUSED(str))
{
{
public:
Averager(const char *sz) { m_sz = sz; m_nTotal = m_nCount = 0; }
- ~Averager()
+ ~Averager()
{ printf("wxString: average %s = %f\n", m_sz, ((float)m_nTotal)/m_nCount); }
void Add(size_t n) { m_nTotal += n; m_nCount++; }
wxString::wxString(const wchar_t *pwz)
{
// first get necessary size
+
+ // NB: GNU libc5 wcstombs() is completely broken, don't use it (it doesn't
+ // honor the 3rd parameter, thus it will happily crash here).
+#ifdef wxUSE_WCSRTOMBS
+ // don't know if it's really needed (or if we can pass NULL), but better safe
+ // than quick
+ mbstate_t mbstate;
+ size_t nLen = wcsrtombs((char *) NULL, &pwz, 0, &mbstate);
+#else // !GNU libc
size_t nLen = wcstombs((char *) NULL, pwz, 0);
+#endif // GNU
// empty?
if ( nLen != 0 ) {
{
STATISTICS_ADD(SummandLength, nSrcLen);
- // concatenating an empty string is a NOP, but it happens quite rarely,
- // so we don't waste our time checking for it
- // if ( nSrcLen > 0 )
- wxStringData *pData = GetStringData();
- size_t nLen = pData->nDataLength;
- size_t nNewLen = nLen + nSrcLen;
+ // concatenating an empty string is a NOP
+ if ( nSrcLen > 0 ) {
+ wxStringData *pData = GetStringData();
+ size_t nLen = pData->nDataLength;
+ size_t nNewLen = nLen + nSrcLen;
- // alloc new buffer if current is too small
- if ( pData->IsShared() ) {
- STATISTICS_ADD(ConcatHit, 0);
+ // alloc new buffer if current is too small
+ if ( pData->IsShared() ) {
+ STATISTICS_ADD(ConcatHit, 0);
- // we have to allocate another buffer
- wxStringData* pOldData = GetStringData();
- AllocBuffer(nNewLen);
- memcpy(m_pchData, pOldData->data(), nLen*sizeof(char));
- pOldData->Unlock();
- }
- else if ( nNewLen > pData->nAllocLength ) {
- STATISTICS_ADD(ConcatHit, 0);
+ // we have to allocate another buffer
+ wxStringData* pOldData = GetStringData();
+ AllocBuffer(nNewLen);
+ memcpy(m_pchData, pOldData->data(), nLen*sizeof(char));
+ pOldData->Unlock();
+ }
+ else if ( nNewLen > pData->nAllocLength ) {
+ STATISTICS_ADD(ConcatHit, 0);
- // we have to grow the buffer
- Alloc(nNewLen);
- }
- else {
- STATISTICS_ADD(ConcatHit, 1);
+ // we have to grow the buffer
+ Alloc(nNewLen);
+ }
+ else {
+ STATISTICS_ADD(ConcatHit, 1);
- // the buffer is already big enough
- }
+ // the buffer is already big enough
+ }
- // should be enough space
- wxASSERT( nNewLen <= GetStringData()->nAllocLength );
+ // should be enough space
+ wxASSERT( nNewLen <= GetStringData()->nAllocLength );
- // fast concatenation - all is done in our buffer
- memcpy(m_pchData + nLen, pszSrcData, nSrcLen*sizeof(char));
+ // fast concatenation - all is done in our buffer
+ memcpy(m_pchData + nLen, pszSrcData, nSrcLen*sizeof(char));
- m_pchData[nNewLen] = '\0'; // put terminating '\0'
- GetStringData()->nDataLength = nNewLen; // and fix the length
+ m_pchData[nNewLen] = '\0'; // put terminating '\0'
+ GetStringData()->nDataLength = nNewLen; // and fix the length
+ }
+ //else: the string to append was empty
}
/*
}
// extract string of length nCount starting at nFirst
-// default value of nCount is 0 and means "till the end"
wxString wxString::Mid(size_t nFirst, size_t nCount) const
{
+ wxStringData *pData = GetStringData();
+ size_t nLen = pData->nDataLength;
+
+ // default value of nCount is STRING_MAXLEN and means "till the end"
+ if ( nCount == STRING_MAXLEN )
+ {
+ nCount = nLen - nFirst;
+ }
+
// out-of-bounds requests return sensible things
- if ( nCount == 0 )
- nCount = GetStringData()->nDataLength - nFirst;
+ if ( nFirst + nCount > nLen )
+ {
+ nCount = nLen - nFirst;
+ }
- if ( nFirst + nCount > (size_t)GetStringData()->nDataLength )
- nCount = GetStringData()->nDataLength - nFirst;
- if ( nFirst > (size_t)GetStringData()->nDataLength )
+ if ( nFirst > nLen )
+ {
+ // AllocCopy() will return empty string
nCount = 0;
+ }
wxString dest;
AllocCopy(dest, nCount, nFirst);
+
return dest;
}
// trims spaces (in the sense of isspace) from left or right side
wxString& wxString::Trim(bool bFromRight)
{
- CopyBeforeWrite();
-
- if ( bFromRight )
+ // first check if we're going to modify the string at all
+ if ( !IsEmpty() &&
+ (
+ (bFromRight && isspace(GetChar(Len() - 1))) ||
+ (!bFromRight && isspace(GetChar(0u)))
+ )
+ )
{
- // find last non-space character
- char *psz = m_pchData + GetStringData()->nDataLength - 1;
- while ( isspace(*psz) && (psz >= m_pchData) )
- psz--;
-
- // truncate at trailing space start
- *++psz = '\0';
- GetStringData()->nDataLength = psz - m_pchData;
- }
- else
- {
- // find first non-space character
- const char *psz = m_pchData;
- while ( isspace(*psz) )
- psz++;
-
- // fix up data and length
- int nDataLength = GetStringData()->nDataLength - (psz - m_pchData);
- memmove(m_pchData, psz, (nDataLength + 1)*sizeof(char));
- GetStringData()->nDataLength = nDataLength;
+ // ok, there is at least one space to trim
+ CopyBeforeWrite();
+
+ if ( bFromRight )
+ {
+ // find last non-space character
+ char *psz = m_pchData + GetStringData()->nDataLength - 1;
+ while ( isspace(*psz) && (psz >= m_pchData) )
+ psz--;
+
+ // truncate at trailing space start
+ *++psz = '\0';
+ GetStringData()->nDataLength = psz - m_pchData;
+ }
+ else
+ {
+ // find first non-space character
+ const char *psz = m_pchData;
+ while ( isspace(*psz) )
+ psz++;
+
+ // fix up data and length
+ int nDataLength = GetStringData()->nDataLength - (psz - m_pchData);
+ memmove(m_pchData, psz, (nDataLength + 1)*sizeof(char));
+ GetStringData()->nDataLength = nDataLength;
+ }
}
return *this;
projects / wxWidgets.git / blobdiff