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dolphin/Externals/wxWidgets3/include/wx/string.h

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///////////////////////////////////////////////////////////////////////////////
// Name: wx/string.h
// Purpose: wxString class
// Author: Vadim Zeitlin
// Modified by:
// Created: 29/01/98
// Copyright: (c) 1998 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
// Licence: wxWindows licence
///////////////////////////////////////////////////////////////////////////////
/*
Efficient string class [more or less] compatible with MFC CString,
wxWidgets version 1 wxString and std::string and some handy functions
missing from string.h.
*/
#ifndef _WX_WXSTRING_H__
#define _WX_WXSTRING_H__
// ----------------------------------------------------------------------------
// headers
// ----------------------------------------------------------------------------
#include "wx/defs.h" // everybody should include this
#if defined(__WXMAC__)
#include <ctype.h>
#endif
#include <string.h>
#include <stdio.h>
#include <stdarg.h>
#include <limits.h>
#include <stdlib.h>
#include "wx/wxcrtbase.h" // for wxChar, wxStrlen() etc.
#include "wx/strvararg.h"
#include "wx/buffer.h" // for wxCharBuffer
#include "wx/strconv.h" // for wxConvertXXX() macros and wxMBConv classes
#include "wx/stringimpl.h"
#include "wx/stringops.h"
#include "wx/unichar.h"
// by default we cache the mapping of the positions in UTF-8 string to the byte
// offset as this results in noticeable performance improvements for loops over
// strings using indices; comment out this line to disable this
//
// notice that this optimization is well worth using even in debug builds as it
// changes asymptotic complexity of algorithms using indices to iterate over
// wxString back to expected linear from quadratic
//
// also notice that wxTLS_TYPE() (__declspec(thread) in this case) is unsafe to
// use in DLL build under pre-Vista Windows so we disable this code for now, if
// anybody really needs to use UTF-8 build under Windows with this optimization
// it would have to be re-tested and probably corrected
// CS: under OSX release builds the string destructor/cache cleanup sometimes
// crashes, disable until we find the true reason or a better workaround
#if wxUSE_UNICODE_UTF8 && !defined(__WINDOWS__) && !defined(__WXOSX__)
#define wxUSE_STRING_POS_CACHE 1
#else
#define wxUSE_STRING_POS_CACHE 0
#endif
#if wxUSE_STRING_POS_CACHE
#include "wx/tls.h"
// change this 0 to 1 to enable additional (very expensive) asserts
// verifying that string caching logic works as expected
#if 0
#define wxSTRING_CACHE_ASSERT(cond) wxASSERT(cond)
#else
#define wxSTRING_CACHE_ASSERT(cond)
#endif
#endif // wxUSE_STRING_POS_CACHE
class WXDLLIMPEXP_FWD_BASE wxString;
// unless this symbol is predefined to disable the compatibility functions, do
// use them
#ifndef WXWIN_COMPATIBILITY_STRING_PTR_AS_ITER
#define WXWIN_COMPATIBILITY_STRING_PTR_AS_ITER 1
#endif
namespace wxPrivate
{
template <typename T> struct wxStringAsBufHelper;
}
// ---------------------------------------------------------------------------
// macros
// ---------------------------------------------------------------------------
// casts [unfortunately!] needed to call some broken functions which require
// "char *" instead of "const char *"
#define WXSTRINGCAST (wxChar *)(const wxChar *)
#define wxCSTRINGCAST (wxChar *)(const wxChar *)
#define wxMBSTRINGCAST (char *)(const char *)
#define wxWCSTRINGCAST (wchar_t *)(const wchar_t *)
// ----------------------------------------------------------------------------
// constants
// ----------------------------------------------------------------------------
// ---------------------------------------------------------------------------
// global functions complementing standard C string library replacements for
// strlen() and portable strcasecmp()
//---------------------------------------------------------------------------
#if WXWIN_COMPATIBILITY_2_8
// Use wxXXX() functions from wxcrt.h instead! These functions are for
// backwards compatibility only.
// checks whether the passed in pointer is NULL and if the string is empty
wxDEPRECATED_MSG("use wxIsEmpty() instead")
inline bool IsEmpty(const char *p) { return (!p || !*p); }
// safe version of strlen() (returns 0 if passed NULL pointer)
wxDEPRECATED_MSG("use wxStrlen() instead")
inline size_t Strlen(const char *psz)
{ return psz ? strlen(psz) : 0; }
// portable strcasecmp/_stricmp
wxDEPRECATED_MSG("use wxStricmp() instead")
inline int Stricmp(const char *psz1, const char *psz2)
{ return wxCRT_StricmpA(psz1, psz2); }
#endif // WXWIN_COMPATIBILITY_2_8
// ----------------------------------------------------------------------------
// wxCStrData
// ----------------------------------------------------------------------------
// Lightweight object returned by wxString::c_str() and implicitly convertible
// to either const char* or const wchar_t*.
class wxCStrData
{
private:
// Ctors; for internal use by wxString and wxCStrData only
wxCStrData(const wxString *str, size_t offset = 0, bool owned = false)
: m_str(str), m_offset(offset), m_owned(owned) {}
public:
// Ctor constructs the object from char literal; they are needed to make
// operator?: compile and they intentionally take char*, not const char*
inline wxCStrData(char *buf);
inline wxCStrData(wchar_t *buf);
inline wxCStrData(const wxCStrData& data);
inline ~wxCStrData();
// AsWChar() and AsChar() can't be defined here as they use wxString and so
// must come after it and because of this won't be inlined when called from
// wxString methods (without a lot of work to extract these wxString methods
// from inside the class itself). But we still define them being inline
// below to let compiler inline them from elsewhere. And because of this we
// must declare them as inline here because otherwise some compilers give
// warnings about them, e.g. mingw32 3.4.5 warns about "<symbol> defined
// locally after being referenced with dllimport linkage" while IRIX
// mipsPro 7.4 warns about "function declared inline after being called".
inline const wchar_t* AsWChar() const;
operator const wchar_t*() const { return AsWChar(); }
inline const char* AsChar() const;
const unsigned char* AsUnsignedChar() const
{ return (const unsigned char *) AsChar(); }
operator const char*() const { return AsChar(); }
operator const unsigned char*() const { return AsUnsignedChar(); }
operator const void*() const { return AsChar(); }
// returns buffers that are valid as long as the associated wxString exists
const wxScopedCharBuffer AsCharBuf() const
{
return wxScopedCharBuffer::CreateNonOwned(AsChar());
}
const wxScopedWCharBuffer AsWCharBuf() const
{
return wxScopedWCharBuffer::CreateNonOwned(AsWChar());
}
inline wxString AsString() const;
// returns the value as C string in internal representation (equivalent
// to AsString().wx_str(), but more efficient)
const wxStringCharType *AsInternal() const;
// allow expressions like "c_str()[0]":
inline wxUniChar operator[](size_t n) const;
wxUniChar operator[](int n) const { return operator[](size_t(n)); }
wxUniChar operator[](long n) const { return operator[](size_t(n)); }
#ifndef wxSIZE_T_IS_UINT
wxUniChar operator[](unsigned int n) const { return operator[](size_t(n)); }
#endif // size_t != unsigned int
// These operators are needed to emulate the pointer semantics of c_str():
// expressions like "wxChar *p = str.c_str() + 1;" should continue to work
// (we need both versions to resolve ambiguities). Note that this means
// the 'n' value is interpreted as addition to char*/wchar_t* pointer, it
// is *not* number of Unicode characters in wxString.
wxCStrData operator+(int n) const
{ return wxCStrData(m_str, m_offset + n, m_owned); }
wxCStrData operator+(long n) const
{ return wxCStrData(m_str, m_offset + n, m_owned); }
wxCStrData operator+(size_t n) const
{ return wxCStrData(m_str, m_offset + n, m_owned); }
// and these for "str.c_str() + (p2 - p1)" (it also works for any integer
// expression but it must be ptrdiff_t and not e.g. int to work in this
// example):
wxCStrData operator-(ptrdiff_t n) const
{
wxASSERT_MSG( n <= (ptrdiff_t)m_offset,
wxT("attempt to construct address before the beginning of the string") );
return wxCStrData(m_str, m_offset - n, m_owned);
}
// this operator is needed to make expressions like "*c_str()" or
// "*(c_str() + 2)" work
inline wxUniChar operator*() const;
private:
// the wxString this object was returned for
const wxString *m_str;
// Offset into c_str() return value. Note that this is *not* offset in
// m_str in Unicode characters. Instead, it is index into the
// char*/wchar_t* buffer returned by c_str(). It's interpretation depends
// on how is the wxCStrData instance used: if it is eventually cast to
// const char*, m_offset will be in bytes form string's start; if it is
// cast to const wchar_t*, it will be in wchar_t values.
size_t m_offset;
// should m_str be deleted, i.e. is it owned by us?
bool m_owned;
friend class WXDLLIMPEXP_FWD_BASE wxString;
};
// ----------------------------------------------------------------------------
// wxString: string class trying to be compatible with std::string, MFC
// CString and wxWindows 1.x wxString all at once
// ---------------------------------------------------------------------------
#if wxUSE_UNICODE_UTF8
// see the comment near wxString::iterator for why we need this
class WXDLLIMPEXP_BASE wxStringIteratorNode
{
public:
wxStringIteratorNode()
: m_str(NULL), m_citer(NULL), m_iter(NULL), m_prev(NULL), m_next(NULL) {}
wxStringIteratorNode(const wxString *str,
wxStringImpl::const_iterator *citer)
{ DoSet(str, citer, NULL); }
wxStringIteratorNode(const wxString *str, wxStringImpl::iterator *iter)
{ DoSet(str, NULL, iter); }
~wxStringIteratorNode()
{ clear(); }
inline void set(const wxString *str, wxStringImpl::const_iterator *citer)
{ clear(); DoSet(str, citer, NULL); }
inline void set(const wxString *str, wxStringImpl::iterator *iter)
{ clear(); DoSet(str, NULL, iter); }
const wxString *m_str;
wxStringImpl::const_iterator *m_citer;
wxStringImpl::iterator *m_iter;
wxStringIteratorNode *m_prev, *m_next;
private:
inline void clear();
inline void DoSet(const wxString *str,
wxStringImpl::const_iterator *citer,
wxStringImpl::iterator *iter);
// the node belongs to a particular iterator instance, it's not copied
// when a copy of the iterator is made
wxDECLARE_NO_COPY_CLASS(wxStringIteratorNode);
};
#endif // wxUSE_UNICODE_UTF8
class WXDLLIMPEXP_BASE wxString
{
// NB: special care was taken in arranging the member functions in such order
// that all inline functions can be effectively inlined, verify that all
// performance critical functions are still inlined if you change order!
public:
// an 'invalid' value for string index, moved to this place due to a CW bug
static const size_t npos;
private:
// if we hadn't made these operators private, it would be possible to
// compile "wxString s; s = 17;" without any warnings as 17 is implicitly
// converted to char in C and we do have operator=(char)
//
// NB: we don't need other versions (short/long and unsigned) as attempt
// to assign another numeric type to wxString will now result in
// ambiguity between operator=(char) and operator=(int)
wxString& operator=(int);
// these methods are not implemented - there is _no_ conversion from int to
// string, you're doing something wrong if the compiler wants to call it!
//
// try `s << i' or `s.Printf("%d", i)' instead
wxString(int);
// buffer for holding temporary substring when using any of the methods
// that take (char*,size_t) or (wchar_t*,size_t) arguments:
template<typename T>
struct SubstrBufFromType
{
T data;
size_t len;
SubstrBufFromType(const T& data_, size_t len_)
: data(data_), len(len_)
{
wxASSERT_MSG( len != npos, "must have real length" );
}
};
#if wxUSE_UNICODE_UTF8
// even char* -> char* needs conversion, from locale charset to UTF-8
typedef SubstrBufFromType<wxScopedCharBuffer> SubstrBufFromWC;
typedef SubstrBufFromType<wxScopedCharBuffer> SubstrBufFromMB;
#elif wxUSE_UNICODE_WCHAR
typedef SubstrBufFromType<const wchar_t*> SubstrBufFromWC;
typedef SubstrBufFromType<wxScopedWCharBuffer> SubstrBufFromMB;
#else
typedef SubstrBufFromType<const char*> SubstrBufFromMB;
typedef SubstrBufFromType<wxScopedCharBuffer> SubstrBufFromWC;
#endif
// Functions implementing primitive operations on string data; wxString
// methods and iterators are implemented in terms of it. The differences
// between UTF-8 and wchar_t* representations of the string are mostly
// contained here.
#if wxUSE_UNICODE_UTF8
static SubstrBufFromMB ConvertStr(const char *psz, size_t nLength,
const wxMBConv& conv);
static SubstrBufFromWC ConvertStr(const wchar_t *pwz, size_t nLength,
const wxMBConv& conv);
#elif wxUSE_UNICODE_WCHAR
static SubstrBufFromMB ConvertStr(const char *psz, size_t nLength,
const wxMBConv& conv);
#else
static SubstrBufFromWC ConvertStr(const wchar_t *pwz, size_t nLength,
const wxMBConv& conv);
#endif
#if !wxUSE_UNICODE_UTF8 // wxUSE_UNICODE_WCHAR or !wxUSE_UNICODE
// returns C string encoded as the implementation expects:
#if wxUSE_UNICODE
static const wchar_t* ImplStr(const wchar_t* str)
{ return str ? str : wxT(""); }
static const SubstrBufFromWC ImplStr(const wchar_t* str, size_t n)
{ return SubstrBufFromWC(str, (str && n == npos) ? wxWcslen(str) : n); }
static wxScopedWCharBuffer ImplStr(const char* str,
const wxMBConv& conv = wxConvLibc)
{ return ConvertStr(str, npos, conv).data; }
static SubstrBufFromMB ImplStr(const char* str, size_t n,
const wxMBConv& conv = wxConvLibc)
{ return ConvertStr(str, n, conv); }
#else
static const char* ImplStr(const char* str,
const wxMBConv& WXUNUSED(conv) = wxConvLibc)
{ return str ? str : ""; }
static const SubstrBufFromMB ImplStr(const char* str, size_t n,
const wxMBConv& WXUNUSED(conv) = wxConvLibc)
{ return SubstrBufFromMB(str, (str && n == npos) ? wxStrlen(str) : n); }
static wxScopedCharBuffer ImplStr(const wchar_t* str)
{ return ConvertStr(str, npos, wxConvLibc).data; }
static SubstrBufFromWC ImplStr(const wchar_t* str, size_t n)
{ return ConvertStr(str, n, wxConvLibc); }
#endif
// translates position index in wxString to/from index in underlying
// wxStringImpl:
static size_t PosToImpl(size_t pos) { return pos; }
static void PosLenToImpl(size_t pos, size_t len,
size_t *implPos, size_t *implLen)
{ *implPos = pos; *implLen = len; }
static size_t LenToImpl(size_t len) { return len; }
static size_t PosFromImpl(size_t pos) { return pos; }
// we don't want to define these as empty inline functions as it could
// result in noticeable (and quite unnecessary in non-UTF-8 build) slowdown
// in debug build where the inline functions are not effectively inlined
#define wxSTRING_INVALIDATE_CACHE()
#define wxSTRING_INVALIDATE_CACHED_LENGTH()
#define wxSTRING_UPDATE_CACHED_LENGTH(n)
#define wxSTRING_SET_CACHED_LENGTH(n)
#else // wxUSE_UNICODE_UTF8
static wxScopedCharBuffer ImplStr(const char* str,
const wxMBConv& conv = wxConvLibc)
{ return ConvertStr(str, npos, conv).data; }
static SubstrBufFromMB ImplStr(const char* str, size_t n,
const wxMBConv& conv = wxConvLibc)
{ return ConvertStr(str, n, conv); }
static wxScopedCharBuffer ImplStr(const wchar_t* str)
{ return ConvertStr(str, npos, wxMBConvUTF8()).data; }
static SubstrBufFromWC ImplStr(const wchar_t* str, size_t n)
{ return ConvertStr(str, n, wxMBConvUTF8()); }
#if wxUSE_STRING_POS_CACHE
// this is an extremely simple cache used by PosToImpl(): each cache element
// contains the string it applies to and the index corresponding to the last
// used position in this wxString in its m_impl string
//
// NB: notice that this struct (and nested Element one) must be a POD or we
// wouldn't be able to use a thread-local variable of this type, in
// particular it should have no ctor -- we rely on statics being
// initialized to 0 instead
struct Cache
{
enum { SIZE = 8 };
struct Element
{
const wxString *str; // the string to which this element applies
size_t pos, // the cached index in this string
impl, // the corresponding position in its m_impl
len; // cached length or npos if unknown
// reset cached index to 0
void ResetPos() { pos = impl = 0; }
// reset position and length
void Reset() { ResetPos(); len = npos; }
};
// cache the indices mapping for the last few string used
Element cached[SIZE];
// the last used index
unsigned lastUsed;
};
#ifndef wxHAS_COMPILER_TLS
// we must use an accessor function and not a static variable when the TLS
// variables support is implemented in the library (and not by the compiler)
// because the global s_cache variable could be not yet initialized when a
// ctor of another global object is executed and if that ctor uses any
// wxString methods, bad things happen
//
// however notice that this approach does not work when compiler TLS is used,
// at least not with g++ 4.1.2 under amd64 as it apparently compiles code
// using this accessor incorrectly when optimizations are enabled (-O2 is
// enough) -- luckily we don't need it then neither as static __thread
// variables are initialized by 0 anyhow then and so we can use the variable
// directly
WXEXPORT static Cache& GetCache()
{
static wxTLS_TYPE(Cache) s_cache;
return wxTLS_VALUE(s_cache);
}
// this helper struct is used to ensure that GetCache() is called during
// static initialization time, i.e. before any threads creation, as otherwise
// the static s_cache construction inside GetCache() wouldn't be MT-safe
friend struct wxStrCacheInitializer;
#else // wxHAS_COMPILER_TLS
static wxTLS_TYPE(Cache) ms_cache;
static Cache& GetCache() { return wxTLS_VALUE(ms_cache); }
#endif // !wxHAS_COMPILER_TLS/wxHAS_COMPILER_TLS
static Cache::Element *GetCacheBegin() { return GetCache().cached; }
static Cache::Element *GetCacheEnd() { return GetCacheBegin() + Cache::SIZE; }
static unsigned& LastUsedCacheElement() { return GetCache().lastUsed; }
// this is used in debug builds only to provide a convenient function,
// callable from a debugger, to show the cache contents
friend struct wxStrCacheDumper;
// uncomment this to have access to some profiling statistics on program
// termination
//#define wxPROFILE_STRING_CACHE
#ifdef wxPROFILE_STRING_CACHE
static struct PosToImplCacheStats
{
unsigned postot, // total non-trivial calls to PosToImpl
poshits, // cache hits from PosToImpl()
mishits, // cached position beyond the needed one
sumpos, // sum of all positions, used to compute the
// average position after dividing by postot
sumofs, // sum of all offsets after using the cache, used to
// compute the average after dividing by hits
lentot, // number of total calls to length()
lenhits; // number of cache hits in length()
} ms_cacheStats;
friend struct wxStrCacheStatsDumper;
#define wxCACHE_PROFILE_FIELD_INC(field) ms_cacheStats.field++
#define wxCACHE_PROFILE_FIELD_ADD(field, val) ms_cacheStats.field += (val)
#else // !wxPROFILE_STRING_CACHE
#define wxCACHE_PROFILE_FIELD_INC(field)
#define wxCACHE_PROFILE_FIELD_ADD(field, val)
#endif // wxPROFILE_STRING_CACHE/!wxPROFILE_STRING_CACHE
// note: it could seem that the functions below shouldn't be inline because
// they are big, contain loops and so the compiler shouldn't be able to
// inline them anyhow, however moving them into string.cpp does decrease the
// code performance by ~5%, at least when using g++ 4.1 so do keep them here
// unless tests show that it's not advantageous any more
// return the pointer to the cache element for this string or NULL if not
// cached
Cache::Element *FindCacheElement() const
{
// profiling seems to show a small but consistent gain if we use this
// simple loop instead of starting from the last used element (there are
// a lot of misses in this function...)
Cache::Element * const cacheBegin = GetCacheBegin();
#ifndef wxHAS_COMPILER_TLS
// during destruction tls calls may return NULL, in this case return NULL
// immediately without accessing anything else
if ( cacheBegin == NULL )
return NULL;
#endif
Cache::Element * const cacheEnd = GetCacheEnd();
for ( Cache::Element *c = cacheBegin; c != cacheEnd; c++ )
{
if ( c->str == this )
return c;
}
return NULL;
}
// unlike FindCacheElement(), this one always returns a valid pointer to the
// cache element for this string, it may have valid last cached position and
// its corresponding index in the byte string or not
Cache::Element *GetCacheElement() const
{
Cache::Element * const cacheBegin = GetCacheBegin();
Cache::Element * const cacheEnd = GetCacheEnd();
Cache::Element * const cacheStart = cacheBegin + LastUsedCacheElement();
// check the last used first, this does no (measurable) harm for a miss
// but does help for simple loops addressing the same string all the time
if ( cacheStart->str == this )
return cacheStart;
// notice that we're going to check cacheStart again inside this call but
// profiling shows that it's still faster to use a simple loop like
// inside FindCacheElement() than manually looping with wrapping starting
// from the cache entry after the start one
Cache::Element *c = FindCacheElement();
if ( !c )
{
// claim the next cache entry for this string
c = cacheStart;
if ( ++c == cacheEnd )
c = cacheBegin;
c->str = this;
c->Reset();
// and remember the last used element
LastUsedCacheElement() = c - cacheBegin;
}
return c;
}
size_t DoPosToImpl(size_t pos) const
{
wxCACHE_PROFILE_FIELD_INC(postot);
// NB: although the case of pos == 1 (and offset from cached position
// equal to 1) are common, nothing is gained by writing special code
// for handling them, the compiler (at least g++ 4.1 used) seems to
// optimize the code well enough on its own
wxCACHE_PROFILE_FIELD_ADD(sumpos, pos);
Cache::Element * const cache = GetCacheElement();
// cached position can't be 0 so if it is, it means that this entry was
// used for length caching only so far, i.e. it doesn't count as a hit
// from our point of view
if ( cache->pos )
{
wxCACHE_PROFILE_FIELD_INC(poshits);
}
if ( pos == cache->pos )
return cache->impl;
// this seems to happen only rarely so just reset the cache in this case
// instead of complicating code even further by seeking backwards in this
// case
if ( cache->pos > pos )
{
wxCACHE_PROFILE_FIELD_INC(mishits);
cache->ResetPos();
}
wxCACHE_PROFILE_FIELD_ADD(sumofs, pos - cache->pos);
wxStringImpl::const_iterator i(m_impl.begin() + cache->impl);
for ( size_t n = cache->pos; n < pos; n++ )
wxStringOperations::IncIter(i);
cache->pos = pos;
cache->impl = i - m_impl.begin();
wxSTRING_CACHE_ASSERT(
(int)cache->impl == (begin() + pos).impl() - m_impl.begin() );
return cache->impl;
}
void InvalidateCache()
{
Cache::Element * const cache = FindCacheElement();
if ( cache )
cache->Reset();
}
void InvalidateCachedLength()
{
Cache::Element * const cache = FindCacheElement();
if ( cache )
cache->len = npos;
}
void SetCachedLength(size_t len)
{
// we optimistically cache the length here even if the string wasn't
// present in the cache before, this seems to do no harm and the
// potential for avoiding length recomputation for long strings looks
// interesting
GetCacheElement()->len = len;
}
void UpdateCachedLength(ptrdiff_t delta)
{
Cache::Element * const cache = FindCacheElement();
if ( cache && cache->len != npos )
{
wxSTRING_CACHE_ASSERT( (ptrdiff_t)cache->len + delta >= 0 );
cache->len += delta;
}
}
#define wxSTRING_INVALIDATE_CACHE() InvalidateCache()
#define wxSTRING_INVALIDATE_CACHED_LENGTH() InvalidateCachedLength()
#define wxSTRING_UPDATE_CACHED_LENGTH(n) UpdateCachedLength(n)
#define wxSTRING_SET_CACHED_LENGTH(n) SetCachedLength(n)
#else // !wxUSE_STRING_POS_CACHE
size_t DoPosToImpl(size_t pos) const
{
return (begin() + pos).impl() - m_impl.begin();
}
#define wxSTRING_INVALIDATE_CACHE()
#define wxSTRING_INVALIDATE_CACHED_LENGTH()
#define wxSTRING_UPDATE_CACHED_LENGTH(n)
#define wxSTRING_SET_CACHED_LENGTH(n)
#endif // wxUSE_STRING_POS_CACHE/!wxUSE_STRING_POS_CACHE
size_t PosToImpl(size_t pos) const
{
return pos == 0 || pos == npos ? pos : DoPosToImpl(pos);
}
void PosLenToImpl(size_t pos, size_t len, size_t *implPos, size_t *implLen) const;
size_t LenToImpl(size_t len) const
{
size_t pos, len2;
PosLenToImpl(0, len, &pos, &len2);
return len2;
}
size_t PosFromImpl(size_t pos) const
{
if ( pos == 0 || pos == npos )
return pos;
else
return const_iterator(this, m_impl.begin() + pos) - begin();
}
#endif // !wxUSE_UNICODE_UTF8/wxUSE_UNICODE_UTF8
public:
// standard types
typedef wxUniChar value_type;
typedef wxUniChar char_type;
typedef wxUniCharRef reference;
typedef wxChar* pointer;
typedef const wxChar* const_pointer;
typedef size_t size_type;
typedef wxUniChar const_reference;
#if wxUSE_STD_STRING
#if wxUSE_UNICODE_UTF8
// random access is not O(1), as required by Random Access Iterator
#define WX_STR_ITERATOR_TAG std::bidirectional_iterator_tag
#else
#define WX_STR_ITERATOR_TAG std::random_access_iterator_tag
#endif
#define WX_DEFINE_ITERATOR_CATEGORY(cat) typedef cat iterator_category;
#else
// not defining iterator_category at all in this case is better than defining
// it as some dummy type -- at least it results in more intelligible error
// messages
#define WX_DEFINE_ITERATOR_CATEGORY(cat)
#endif
#define WX_STR_ITERATOR_IMPL(iterator_name, pointer_type, reference_type) \
private: \
typedef wxStringImpl::iterator_name underlying_iterator; \
public: \
WX_DEFINE_ITERATOR_CATEGORY(WX_STR_ITERATOR_TAG) \
typedef wxUniChar value_type; \
typedef ptrdiff_t difference_type; \
typedef reference_type reference; \
typedef pointer_type pointer; \
\
reference operator[](size_t n) const { return *(*this + n); } \
\
iterator_name& operator++() \
{ wxStringOperations::IncIter(m_cur); return *this; } \
iterator_name& operator--() \
{ wxStringOperations::DecIter(m_cur); return *this; } \
iterator_name operator++(int) \
{ \
iterator_name tmp = *this; \
wxStringOperations::IncIter(m_cur); \
return tmp; \
} \
iterator_name operator--(int) \
{ \
iterator_name tmp = *this; \
wxStringOperations::DecIter(m_cur); \
return tmp; \
} \
\
iterator_name& operator+=(ptrdiff_t n) \
{ \
m_cur = wxStringOperations::AddToIter(m_cur, n); \
return *this; \
} \
iterator_name& operator-=(ptrdiff_t n) \
{ \
m_cur = wxStringOperations::AddToIter(m_cur, -n); \
return *this; \
} \
\
difference_type operator-(const iterator_name& i) const \
{ return wxStringOperations::DiffIters(m_cur, i.m_cur); } \
\
bool operator==(const iterator_name& i) const \
{ return m_cur == i.m_cur; } \
bool operator!=(const iterator_name& i) const \
{ return m_cur != i.m_cur; } \
\
bool operator<(const iterator_name& i) const \
{ return m_cur < i.m_cur; } \
bool operator>(const iterator_name& i) const \
{ return m_cur > i.m_cur; } \
bool operator<=(const iterator_name& i) const \
{ return m_cur <= i.m_cur; } \
bool operator>=(const iterator_name& i) const \
{ return m_cur >= i.m_cur; } \
\
private: \
/* for internal wxString use only: */ \
underlying_iterator impl() const { return m_cur; } \
\
friend class wxString; \
friend class wxCStrData; \
\
private: \
underlying_iterator m_cur
class WXDLLIMPEXP_FWD_BASE const_iterator;
#if wxUSE_UNICODE_UTF8
// NB: In UTF-8 build, (non-const) iterator needs to keep reference
// to the underlying wxStringImpl, because UTF-8 is variable-length
// encoding and changing the value pointer to by an iterator (using
// its operator*) requires calling wxStringImpl::replace() if the old
// and new values differ in their encoding's length.
//
// Furthermore, the replace() call may invalid all iterators for the
// string, so we have to keep track of outstanding iterators and update
// them if replace() happens.
//
// This is implemented by maintaining linked list of iterators for every
// string and traversing it in wxUniCharRef::operator=(). Head of the
// list is stored in wxString. (FIXME-UTF8)
class WXDLLIMPEXP_BASE iterator
{
WX_STR_ITERATOR_IMPL(iterator, wxChar*, wxUniCharRef);
public:
iterator() {}
iterator(const iterator& i)
: m_cur(i.m_cur), m_node(i.str(), &m_cur) {}
iterator& operator=(const iterator& i)
{
if (&i != this)
{
m_cur = i.m_cur;
m_node.set(i.str(), &m_cur);
}
return *this;
}
reference operator*()
{ return wxUniCharRef::CreateForString(*str(), m_cur); }
iterator operator+(ptrdiff_t n) const
{ return iterator(str(), wxStringOperations::AddToIter(m_cur, n)); }
iterator operator-(ptrdiff_t n) const
{ return iterator(str(), wxStringOperations::AddToIter(m_cur, -n)); }
// Normal iterators need to be comparable with the const_iterators so
// declare the comparison operators and implement them below after the
// full const_iterator declaration.
bool operator==(const const_iterator& i) const;
bool operator!=(const const_iterator& i) const;
bool operator<(const const_iterator& i) const;
bool operator>(const const_iterator& i) const;
bool operator<=(const const_iterator& i) const;
bool operator>=(const const_iterator& i) const;
private:
iterator(wxString *wxstr, underlying_iterator ptr)
: m_cur(ptr), m_node(wxstr, &m_cur) {}
wxString* str() const { return const_cast<wxString*>(m_node.m_str); }
wxStringIteratorNode m_node;
friend class const_iterator;
};
class WXDLLIMPEXP_BASE const_iterator
{
// NB: reference_type is intentionally value, not reference, the character
// may be encoded differently in wxString data:
WX_STR_ITERATOR_IMPL(const_iterator, const wxChar*, wxUniChar);
public:
const_iterator() {}
const_iterator(const const_iterator& i)
: m_cur(i.m_cur), m_node(i.str(), &m_cur) {}
const_iterator(const iterator& i)
: m_cur(i.m_cur), m_node(i.str(), &m_cur) {}
const_iterator& operator=(const const_iterator& i)
{
if (&i != this)
{
m_cur = i.m_cur;
m_node.set(i.str(), &m_cur);
}
return *this;
}
const_iterator& operator=(const iterator& i)
{ m_cur = i.m_cur; m_node.set(i.str(), &m_cur); return *this; }
reference operator*() const
{ return wxStringOperations::DecodeChar(m_cur); }
const_iterator operator+(ptrdiff_t n) const
{ return const_iterator(str(), wxStringOperations::AddToIter(m_cur, n)); }
const_iterator operator-(ptrdiff_t n) const
{ return const_iterator(str(), wxStringOperations::AddToIter(m_cur, -n)); }
// Notice that comparison operators taking non-const iterator are not
// needed here because of the implicit conversion from non-const iterator
// to const ones ensure that the versions for const_iterator declared
// inside WX_STR_ITERATOR_IMPL can be used.
private:
// for internal wxString use only:
const_iterator(const wxString *wxstr, underlying_iterator ptr)
: m_cur(ptr), m_node(wxstr, &m_cur) {}
const wxString* str() const { return m_node.m_str; }
wxStringIteratorNode m_node;
};
size_t IterToImplPos(wxString::iterator i) const
{ return wxStringImpl::const_iterator(i.impl()) - m_impl.begin(); }
iterator GetIterForNthChar(size_t n)
{ return iterator(this, m_impl.begin() + PosToImpl(n)); }
const_iterator GetIterForNthChar(size_t n) const
{ return const_iterator(this, m_impl.begin() + PosToImpl(n)); }
#else // !wxUSE_UNICODE_UTF8
class WXDLLIMPEXP_BASE iterator
{
WX_STR_ITERATOR_IMPL(iterator, wxChar*, wxUniCharRef);
public:
iterator() {}
iterator(const iterator& i) : m_cur(i.m_cur) {}
reference operator*()
{ return wxUniCharRef::CreateForString(m_cur); }
iterator operator+(ptrdiff_t n) const
{ return iterator(wxStringOperations::AddToIter(m_cur, n)); }
iterator operator-(ptrdiff_t n) const
{ return iterator(wxStringOperations::AddToIter(m_cur, -n)); }
// As in UTF-8 case above, define comparison operators taking
// const_iterator too.
bool operator==(const const_iterator& i) const;
bool operator!=(const const_iterator& i) const;
bool operator<(const const_iterator& i) const;
bool operator>(const const_iterator& i) const;
bool operator<=(const const_iterator& i) const;
bool operator>=(const const_iterator& i) const;
private:
// for internal wxString use only:
iterator(underlying_iterator ptr) : m_cur(ptr) {}
iterator(wxString *WXUNUSED(str), underlying_iterator ptr) : m_cur(ptr) {}
friend class const_iterator;
};
class WXDLLIMPEXP_BASE const_iterator
{
// NB: reference_type is intentionally value, not reference, the character
// may be encoded differently in wxString data:
WX_STR_ITERATOR_IMPL(const_iterator, const wxChar*, wxUniChar);
public:
const_iterator() {}
const_iterator(const const_iterator& i) : m_cur(i.m_cur) {}
const_iterator(const iterator& i) : m_cur(i.m_cur) {}
reference operator*() const
{ return wxStringOperations::DecodeChar(m_cur); }
const_iterator operator+(ptrdiff_t n) const
{ return const_iterator(wxStringOperations::AddToIter(m_cur, n)); }
const_iterator operator-(ptrdiff_t n) const
{ return const_iterator(wxStringOperations::AddToIter(m_cur, -n)); }
// As in UTF-8 case above, we don't need comparison operators taking
// iterator because we have an implicit conversion from iterator to
// const_iterator so the operators declared by WX_STR_ITERATOR_IMPL will
// be used.
private:
// for internal wxString use only:
const_iterator(underlying_iterator ptr) : m_cur(ptr) {}
const_iterator(const wxString *WXUNUSED(str), underlying_iterator ptr)
: m_cur(ptr) {}
};
iterator GetIterForNthChar(size_t n) { return begin() + n; }
const_iterator GetIterForNthChar(size_t n) const { return begin() + n; }
#endif // wxUSE_UNICODE_UTF8/!wxUSE_UNICODE_UTF8
#undef WX_STR_ITERATOR_TAG
#undef WX_STR_ITERATOR_IMPL
// This method is mostly used by wxWidgets itself and return the offset of
// the given iterator in bytes relative to the start of the buffer
// representing the current string contents in the current locale encoding.
//
// It is inefficient as it involves converting part of the string to this
// encoding (and also unsafe as it simply returns 0 if the conversion fails)
// and so should be avoided if possible, wx itself only uses it to implement
// backwards-compatible API.
ptrdiff_t IterOffsetInMBStr(const const_iterator& i) const
{
const wxString str(begin(), i);
// This is logically equivalent to strlen(str.mb_str()) but avoids
// actually converting the string to multibyte and just computes the
// length that it would have after conversion.
size_t ofs = wxConvLibc.FromWChar(NULL, 0, str.wc_str(), str.length());
return ofs == wxCONV_FAILED ? 0 : static_cast<ptrdiff_t>(ofs);
}
friend class iterator;
friend class const_iterator;
template <typename T>
class reverse_iterator_impl
{
public:
typedef T iterator_type;
WX_DEFINE_ITERATOR_CATEGORY(typename T::iterator_category)
typedef typename T::value_type value_type;
typedef typename T::difference_type difference_type;
typedef typename T::reference reference;
typedef typename T::pointer *pointer;
reverse_iterator_impl() {}
reverse_iterator_impl(iterator_type i) : m_cur(i) {}
reverse_iterator_impl(const reverse_iterator_impl& ri)
: m_cur(ri.m_cur) {}
iterator_type base() const { return m_cur; }
reference operator*() const { return *(m_cur-1); }
reference operator[](size_t n) const { return *(*this + n); }
reverse_iterator_impl& operator++()
{ --m_cur; return *this; }
reverse_iterator_impl operator++(int)
{ reverse_iterator_impl tmp = *this; --m_cur; return tmp; }
reverse_iterator_impl& operator--()
{ ++m_cur; return *this; }
reverse_iterator_impl operator--(int)
{ reverse_iterator_impl tmp = *this; ++m_cur; return tmp; }
// NB: explicit <T> in the functions below is to keep BCC 5.5 happy
reverse_iterator_impl operator+(ptrdiff_t n) const
{ return reverse_iterator_impl<T>(m_cur - n); }
reverse_iterator_impl operator-(ptrdiff_t n) const
{ return reverse_iterator_impl<T>(m_cur + n); }
reverse_iterator_impl operator+=(ptrdiff_t n)
{ m_cur -= n; return *this; }
reverse_iterator_impl operator-=(ptrdiff_t n)
{ m_cur += n; return *this; }
difference_type operator-(const reverse_iterator_impl& i) const
{ return i.m_cur - m_cur; }
bool operator==(const reverse_iterator_impl& ri) const
{ return m_cur == ri.m_cur; }
bool operator!=(const reverse_iterator_impl& ri) const
{ return !(*this == ri); }
bool operator<(const reverse_iterator_impl& i) const
{ return m_cur > i.m_cur; }
bool operator>(const reverse_iterator_impl& i) const
{ return m_cur < i.m_cur; }
bool operator<=(const reverse_iterator_impl& i) const
{ return m_cur >= i.m_cur; }
bool operator>=(const reverse_iterator_impl& i) const
{ return m_cur <= i.m_cur; }
private:
iterator_type m_cur;
};
typedef reverse_iterator_impl<iterator> reverse_iterator;
typedef reverse_iterator_impl<const_iterator> const_reverse_iterator;
private:
// used to transform an expression built using c_str() (and hence of type
// wxCStrData) to an iterator into the string
static const_iterator CreateConstIterator(const wxCStrData& data)
{
return const_iterator(data.m_str,
(data.m_str->begin() + data.m_offset).impl());
}
// in UTF-8 STL build, creation from std::string requires conversion under
// non-UTF8 locales, so we can't have and use wxString(wxStringImpl) ctor;
// instead we define dummy type that lets us have wxString ctor for creation
// from wxStringImpl that couldn't be used by user code (in all other builds,
// "standard" ctors can be used):
#if wxUSE_UNICODE_UTF8 && wxUSE_STL_BASED_WXSTRING
struct CtorFromStringImplTag {};
wxString(CtorFromStringImplTag* WXUNUSED(dummy), const wxStringImpl& src)
: m_impl(src) {}
static wxString FromImpl(const wxStringImpl& src)
{ return wxString((CtorFromStringImplTag*)NULL, src); }
#else
#if !wxUSE_STL_BASED_WXSTRING
wxString(const wxStringImpl& src) : m_impl(src) { }
// else: already defined as wxString(wxStdString) below
#endif
static wxString FromImpl(const wxStringImpl& src) { return wxString(src); }
#endif
public:
// constructors and destructor
// ctor for an empty string
wxString() {}
// copy ctor
wxString(const wxString& stringSrc) : m_impl(stringSrc.m_impl) { }
// string containing nRepeat copies of ch
wxString(wxUniChar ch, size_t nRepeat = 1 )
{ assign(nRepeat, ch); }
wxString(size_t nRepeat, wxUniChar ch)
{ assign(nRepeat, ch); }
wxString(wxUniCharRef ch, size_t nRepeat = 1)
{ assign(nRepeat, ch); }
wxString(size_t nRepeat, wxUniCharRef ch)
{ assign(nRepeat, ch); }
wxString(char ch, size_t nRepeat = 1)
{ assign(nRepeat, ch); }
wxString(size_t nRepeat, char ch)
{ assign(nRepeat, ch); }
wxString(wchar_t ch, size_t nRepeat = 1)
{ assign(nRepeat, ch); }
wxString(size_t nRepeat, wchar_t ch)
{ assign(nRepeat, ch); }
// ctors from char* strings:
wxString(const char *psz)
: m_impl(ImplStr(psz)) {}
wxString(const char *psz, const wxMBConv& conv)
: m_impl(ImplStr(psz, conv)) {}
wxString(const char *psz, size_t nLength)
{ assign(psz, nLength); }
wxString(const char *psz, const wxMBConv& conv, size_t nLength)
{
SubstrBufFromMB str(ImplStr(psz, nLength, conv));
m_impl.assign(str.data, str.len);
}
// and unsigned char*:
wxString(const unsigned char *psz)
: m_impl(ImplStr((const char*)psz)) {}
wxString(const unsigned char *psz, const wxMBConv& conv)
: m_impl(ImplStr((const char*)psz, conv)) {}
wxString(const unsigned char *psz, size_t nLength)
{ assign((const char*)psz, nLength); }
wxString(const unsigned char *psz, const wxMBConv& conv, size_t nLength)
{
SubstrBufFromMB str(ImplStr((const char*)psz, nLength, conv));
m_impl.assign(str.data, str.len);
}
// ctors from wchar_t* strings:
wxString(const wchar_t *pwz)
: m_impl(ImplStr(pwz)) {}
wxString(const wchar_t *pwz, const wxMBConv& WXUNUSED(conv))
: m_impl(ImplStr(pwz)) {}
wxString(const wchar_t *pwz, size_t nLength)
{ assign(pwz, nLength); }
wxString(const wchar_t *pwz, const wxMBConv& WXUNUSED(conv), size_t nLength)
{ assign(pwz, nLength); }
wxString(const wxScopedCharBuffer& buf)
{ assign(buf.data(), buf.length()); }
wxString(const wxScopedWCharBuffer& buf)
{ assign(buf.data(), buf.length()); }
// NB: this version uses m_impl.c_str() to force making a copy of the
// string, so that "wxString(str.c_str())" idiom for passing strings
// between threads works
wxString(const wxCStrData& cstr)
: m_impl(cstr.AsString().m_impl.c_str()) { }
// as we provide both ctors with this signature for both char and unsigned
// char string, we need to provide one for wxCStrData to resolve ambiguity
wxString(const wxCStrData& cstr, size_t nLength)
: m_impl(cstr.AsString().Mid(0, nLength).m_impl) {}
// and because wxString is convertible to wxCStrData and const wxChar *
// we also need to provide this one
wxString(const wxString& str, size_t nLength)
{ assign(str, nLength); }
#if wxUSE_STRING_POS_CACHE
~wxString()
{
// we need to invalidate our cache entry as another string could be
// recreated at the same address (unlikely, but still possible, with the
// heap-allocated strings but perfectly common with stack-allocated ones)
InvalidateCache();
}
#endif // wxUSE_STRING_POS_CACHE
// even if we're not built with wxUSE_STD_STRING_CONV_IN_WXSTRING == 1 it is
// very convenient to allow implicit conversions from std::string to wxString
// and vice verse as this allows to use the same strings in non-GUI and GUI
// code, however we don't want to unconditionally add this ctor as it would
// make wx lib dependent on libstdc++ on some Linux versions which is bad, so
// instead we ask the client code to define this wxUSE_STD_STRING symbol if
// they need it
#if wxUSE_STD_STRING
#if wxUSE_UNICODE_WCHAR
wxString(const wxStdWideString& str) : m_impl(str) {}
#else // UTF-8 or ANSI
wxString(const wxStdWideString& str)
{ assign(str.c_str(), str.length()); }
#endif
#if !wxUSE_UNICODE // ANSI build
// FIXME-UTF8: do this in UTF8 build #if wxUSE_UTF8_LOCALE_ONLY, too
wxString(const std::string& str) : m_impl(str) {}
#else // Unicode
wxString(const std::string& str)
{ assign(str.c_str(), str.length()); }
#endif
#endif // wxUSE_STD_STRING
// Also always provide explicit conversions to std::[w]string in any case,
// see below for the implicit ones.
#if wxUSE_STD_STRING
// We can avoid a copy if we already use this string type internally,
// otherwise we create a copy on the fly:
#if wxUSE_UNICODE_WCHAR && wxUSE_STL_BASED_WXSTRING
#define wxStringToStdWstringRetType const wxStdWideString&
const wxStdWideString& ToStdWstring() const { return m_impl; }
#else
// wxStringImpl is either not std::string or needs conversion
#define wxStringToStdWstringRetType wxStdWideString
wxStdWideString ToStdWstring() const
{
#if wxUSE_UNICODE_WCHAR
wxScopedWCharBuffer buf =
wxScopedWCharBuffer::CreateNonOwned(m_impl.c_str(), m_impl.length());
#else // !wxUSE_UNICODE_WCHAR
wxScopedWCharBuffer buf(wc_str());
#endif
return wxStdWideString(buf.data(), buf.length());
}
#endif
#if (!wxUSE_UNICODE || wxUSE_UTF8_LOCALE_ONLY) && wxUSE_STL_BASED_WXSTRING
// wxStringImpl is std::string in the encoding we want
#define wxStringToStdStringRetType const std::string&
const std::string& ToStdString() const { return m_impl; }
#else
// wxStringImpl is either not std::string or needs conversion
#define wxStringToStdStringRetType std::string
std::string ToStdString() const
{
wxScopedCharBuffer buf(mb_str());
return std::string(buf.data(), buf.length());
}
#endif
#if wxUSE_STD_STRING_CONV_IN_WXSTRING
// Implicit conversions to std::[w]string are not provided by default as
// they conflict with the implicit conversions to "const char/wchar_t *"
// which we use for backwards compatibility but do provide them if
// explicitly requested.
operator wxStringToStdStringRetType() const { return ToStdString(); }
operator wxStringToStdWstringRetType() const { return ToStdWstring(); }
#endif // wxUSE_STD_STRING_CONV_IN_WXSTRING
#undef wxStringToStdStringRetType
#undef wxStringToStdWstringRetType
#endif // wxUSE_STD_STRING
wxString Clone() const
{
// make a deep copy of the string, i.e. the returned string will have
// ref count = 1 with refcounted implementation
return wxString::FromImpl(wxStringImpl(m_impl.c_str(), m_impl.length()));
}
// first valid index position
const_iterator begin() const { return const_iterator(this, m_impl.begin()); }
iterator begin() { return iterator(this, m_impl.begin()); }
// position one after the last valid one
const_iterator end() const { return const_iterator(this, m_impl.end()); }
iterator end() { return iterator(this, m_impl.end()); }
// first element of the reversed string
const_reverse_iterator rbegin() const
{ return const_reverse_iterator(end()); }
reverse_iterator rbegin()
{ return reverse_iterator(end()); }
// one beyond the end of the reversed string
const_reverse_iterator rend() const
{ return const_reverse_iterator(begin()); }
reverse_iterator rend()
{ return reverse_iterator(begin()); }
// std::string methods:
#if wxUSE_UNICODE_UTF8
size_t length() const
{
#if wxUSE_STRING_POS_CACHE
wxCACHE_PROFILE_FIELD_INC(lentot);
Cache::Element * const cache = GetCacheElement();
if ( cache->len == npos )
{
// it's probably not worth trying to be clever and using cache->pos
// here as it's probably 0 anyhow -- you usually call length() before
// starting to index the string
cache->len = end() - begin();
}
else
{
wxCACHE_PROFILE_FIELD_INC(lenhits);
wxSTRING_CACHE_ASSERT( (int)cache->len == end() - begin() );
}
return cache->len;
#else // !wxUSE_STRING_POS_CACHE
return end() - begin();
#endif // wxUSE_STRING_POS_CACHE/!wxUSE_STRING_POS_CACHE
}
#else
size_t length() const { return m_impl.length(); }
#endif
size_type size() const { return length(); }
size_type max_size() const { return npos; }
bool empty() const { return m_impl.empty(); }
// NB: these methods don't have a well-defined meaning in UTF-8 case
size_type capacity() const { return m_impl.capacity(); }
void reserve(size_t sz) { m_impl.reserve(sz); }
void resize(size_t nSize, wxUniChar ch = wxT('\0'))
{
const size_t len = length();
if ( nSize == len)
return;
#if wxUSE_UNICODE_UTF8
if ( nSize < len )
{
wxSTRING_INVALIDATE_CACHE();
// we can't use wxStringImpl::resize() for truncating the string as it
// counts in bytes, not characters
erase(nSize);
return;
}
// we also can't use (presumably more efficient) resize() if we have to
// append characters taking more than one byte
if ( !ch.IsAscii() )
{
append(nSize - len, ch);
}
else // can use (presumably faster) resize() version
#endif // wxUSE_UNICODE_UTF8
{
wxSTRING_INVALIDATE_CACHED_LENGTH();
m_impl.resize(nSize, (wxStringCharType)ch);
}
}
wxString substr(size_t nStart = 0, size_t nLen = npos) const
{
size_t pos, len;
PosLenToImpl(nStart, nLen, &pos, &len);
return FromImpl(m_impl.substr(pos, len));
}
// generic attributes & operations
// as standard strlen()
size_t Len() const { return length(); }
// string contains any characters?
bool IsEmpty() const { return empty(); }
// empty string is "false", so !str will return true
bool operator!() const { return empty(); }
// truncate the string to given length
wxString& Truncate(size_t uiLen);
// empty string contents
void Empty() { clear(); }
// empty the string and free memory
void Clear() { clear(); }
// contents test
// Is an ascii value
bool IsAscii() const;
// Is a number
bool IsNumber() const;
// Is a word
bool IsWord() const;
// data access (all indexes are 0 based)
// read access
wxUniChar at(size_t n) const
{ return wxStringOperations::DecodeChar(m_impl.begin() + PosToImpl(n)); }
wxUniChar GetChar(size_t n) const
{ return at(n); }
// read/write access
wxUniCharRef at(size_t n)
{ return *GetIterForNthChar(n); }
wxUniCharRef GetWritableChar(size_t n)
{ return at(n); }
// write access
void SetChar(size_t n, wxUniChar ch)
{ at(n) = ch; }
// get last character
wxUniChar Last() const
{
wxASSERT_MSG( !empty(), wxT("wxString: index out of bounds") );
return *rbegin();
}
// get writable last character
wxUniCharRef Last()
{
wxASSERT_MSG( !empty(), wxT("wxString: index out of bounds") );
return *rbegin();
}
/*
Note that we we must define all of the overloads below to avoid
ambiguity when using str[0].
*/
wxUniChar operator[](int n) const
{ return at(n); }
wxUniChar operator[](long n) const
{ return at(n); }
wxUniChar operator[](size_t n) const
{ return at(n); }
#ifndef wxSIZE_T_IS_UINT
wxUniChar operator[](unsigned int n) const
{ return at(n); }
#endif // size_t != unsigned int
// operator versions of GetWriteableChar()
wxUniCharRef operator[](int n)
{ return at(n); }
wxUniCharRef operator[](long n)
{ return at(n); }
wxUniCharRef operator[](size_t n)
{ return at(n); }
#ifndef wxSIZE_T_IS_UINT
wxUniCharRef operator[](unsigned int n)
{ return at(n); }
#endif // size_t != unsigned int
/*
Overview of wxString conversions, implicit and explicit:
- wxString has a std::[w]string-like c_str() method, however it does
not return a C-style string directly but instead returns wxCStrData
helper object which is convertible to either "char *" narrow string
or "wchar_t *" wide string. Usually the correct conversion will be
applied by the compiler automatically but if this doesn't happen you
need to explicitly choose one using wxCStrData::AsChar() or AsWChar()
methods or another wxString conversion function.
- One of the places where the conversion does *NOT* happen correctly is
when c_str() is passed to a vararg function such as printf() so you
must *NOT* use c_str() with them. Either use wxPrintf() (all wx
functions do handle c_str() correctly, even if they appear to be
vararg (but they're not, really)) or add an explicit AsChar() or, if
compatibility with previous wxWidgets versions is important, add a
cast to "const char *".
- In non-STL mode only, wxString is also implicitly convertible to
wxCStrData. The same warning as above applies.
- c_str() is polymorphic as it can be converted to either narrow or
wide string. If you explicitly need one or the other, choose to use
mb_str() (for narrow) or wc_str() (for wide) instead. Notice that
these functions can return either the pointer to string directly (if
this is what the string uses internally) or a temporary buffer
containing the string and convertible to it. Again, conversion will
usually be done automatically by the compiler but beware of the
vararg functions: you need an explicit cast when using them.
- There are also non-const versions of mb_str() and wc_str() called
char_str() and wchar_str(). They are only meant to be used with
non-const-correct functions and they always return buffers.
- Finally wx_str() returns whatever string representation is used by
wxString internally. It may be either a narrow or wide string
depending on wxWidgets build mode but it will always be a raw pointer
(and not a buffer).
*/
// explicit conversion to wxCStrData
wxCStrData c_str() const { return wxCStrData(this); }
wxCStrData data() const { return c_str(); }
// implicit conversion to wxCStrData
operator wxCStrData() const { return c_str(); }
// the first two operators conflict with operators for conversion to
// std::string and they must be disabled if those conversions are enabled;
// the next one only makes sense if conversions to char* are also defined
// and not defining it in STL build also helps us to get more clear error
// messages for the code which relies on implicit conversion to char* in
// STL build
#if !wxUSE_STD_STRING_CONV_IN_WXSTRING
operator const char*() const { return c_str(); }
operator const wchar_t*() const { return c_str(); }
// implicit conversion to untyped pointer for compatibility with previous
// wxWidgets versions: this is the same as conversion to const char * so it
// may fail!
operator const void*() const { return c_str(); }
#endif // !wxUSE_STD_STRING_CONV_IN_WXSTRING
// identical to c_str(), for MFC compatibility
const wxCStrData GetData() const { return c_str(); }
// explicit conversion to C string in internal representation (char*,
// wchar_t*, UTF-8-encoded char*, depending on the build):
const wxStringCharType *wx_str() const { return m_impl.c_str(); }
// conversion to *non-const* multibyte or widestring buffer; modifying
// returned buffer won't affect the string, these methods are only useful
// for passing values to const-incorrect functions
wxWritableCharBuffer char_str(const wxMBConv& conv = wxConvLibc) const
{ return mb_str(conv); }
wxWritableWCharBuffer wchar_str() const { return wc_str(); }
// conversion to the buffer of the given type T (= char or wchar_t) and
// also optionally return the buffer length
//
// this is mostly/only useful for the template functions
template <typename T>
wxCharTypeBuffer<T> tchar_str(size_t *len = NULL) const
{
#if wxUSE_UNICODE
// we need a helper dispatcher depending on type
return wxPrivate::wxStringAsBufHelper<T>::Get(*this, len);
#else // ANSI
// T can only be char in ANSI build
if ( len )
*len = length();
return wxCharTypeBuffer<T>::CreateNonOwned(wx_str(), length());
#endif // Unicode build kind
}
// conversion to/from plain (i.e. 7 bit) ASCII: this is useful for
// converting numbers or strings which are certain not to contain special
// chars (typically system functions, X atoms, environment variables etc.)
//
// the behaviour of these functions with the strings containing anything
// else than 7 bit ASCII characters is undefined, use at your own risk.
#if wxUSE_UNICODE
static wxString FromAscii(const char *ascii, size_t len);
static wxString FromAscii(const char *ascii);
static wxString FromAscii(char ascii);
const wxScopedCharBuffer ToAscii(char replaceWith = '_') const;
#else // ANSI
static wxString FromAscii(const char *ascii) { return wxString( ascii ); }
static wxString FromAscii(const char *ascii, size_t len)
{ return wxString( ascii, len ); }
static wxString FromAscii(char ascii) { return wxString( ascii ); }
const char *ToAscii(char WXUNUSED(replaceWith) = '_') const { return c_str(); }
#endif // Unicode/!Unicode
// also provide unsigned char overloads as signed/unsigned doesn't matter
// for 7 bit ASCII characters
static wxString FromAscii(const unsigned char *ascii)
{ return FromAscii((const char *)ascii); }
static wxString FromAscii(const unsigned char *ascii, size_t len)
{ return FromAscii((const char *)ascii, len); }
// conversion to/from UTF-8:
#if wxUSE_UNICODE_UTF8
static wxString FromUTF8Unchecked(const char *utf8)
{
if ( !utf8 )
return wxEmptyString;
wxASSERT( wxStringOperations::IsValidUtf8String(utf8) );
return FromImpl(wxStringImpl(utf8));
}
static wxString FromUTF8Unchecked(const char *utf8, size_t len)
{
if ( !utf8 )
return wxEmptyString;
if ( len == npos )
return FromUTF8Unchecked(utf8);
wxASSERT( wxStringOperations::IsValidUtf8String(utf8, len) );
return FromImpl(wxStringImpl(utf8, len));
}
static wxString FromUTF8(const char *utf8)
{
if ( !utf8 || !wxStringOperations::IsValidUtf8String(utf8) )
return "";
return FromImpl(wxStringImpl(utf8));
}
static wxString FromUTF8(const char *utf8, size_t len)
{
if ( len == npos )
return FromUTF8(utf8);
if ( !utf8 || !wxStringOperations::IsValidUtf8String(utf8, len) )
return "";
return FromImpl(wxStringImpl(utf8, len));
}
const wxScopedCharBuffer utf8_str() const
{ return wxCharBuffer::CreateNonOwned(m_impl.c_str(), m_impl.length()); }
// this function exists in UTF-8 build only and returns the length of the
// internal UTF-8 representation
size_t utf8_length() const { return m_impl.length(); }
#elif wxUSE_UNICODE_WCHAR
static wxString FromUTF8(const char *utf8, size_t len = npos)
{ return wxString(utf8, wxMBConvUTF8(), len); }
static wxString FromUTF8Unchecked(const char *utf8, size_t len = npos)
{
const wxString s(utf8, wxMBConvUTF8(), len);
wxASSERT_MSG( !utf8 || !*utf8 || !s.empty(),
"string must be valid UTF-8" );
return s;
}
const wxScopedCharBuffer utf8_str() const { return mb_str(wxMBConvUTF8()); }
#else // ANSI
static wxString FromUTF8(const char *utf8)
{ return wxString(wxMBConvUTF8().cMB2WC(utf8)); }
static wxString FromUTF8(const char *utf8, size_t len)
{
size_t wlen;
wxScopedWCharBuffer buf(wxMBConvUTF8().cMB2WC(utf8, len == npos ? wxNO_LEN : len, &wlen));
return wxString(buf.data(), wlen);
}
static wxString FromUTF8Unchecked(const char *utf8, size_t len = npos)
{
size_t wlen;
wxScopedWCharBuffer buf
(
wxMBConvUTF8().cMB2WC
(
utf8,
len == npos ? wxNO_LEN : len,
&wlen
)
);
wxASSERT_MSG( !utf8 || !*utf8 || wlen,
"string must be valid UTF-8" );
return wxString(buf.data(), wlen);
}
const wxScopedCharBuffer utf8_str() const
{ return wxMBConvUTF8().cWC2MB(wc_str()); }
#endif
const wxScopedCharBuffer ToUTF8() const { return utf8_str(); }
// functions for storing binary data in wxString:
#if wxUSE_UNICODE
static wxString From8BitData(const char *data, size_t len)
{ return wxString(data, wxConvISO8859_1, len); }
// version for NUL-terminated data:
static wxString From8BitData(const char *data)
{ return wxString(data, wxConvISO8859_1); }
const wxScopedCharBuffer To8BitData() const
{ return mb_str(wxConvISO8859_1); }
#else // ANSI
static wxString From8BitData(const char *data, size_t len)
{ return wxString(data, len); }
// version for NUL-terminated data:
static wxString From8BitData(const char *data)
{ return wxString(data); }
const wxScopedCharBuffer To8BitData() const
{ return wxScopedCharBuffer::CreateNonOwned(wx_str(), length()); }
#endif // Unicode/ANSI
// conversions with (possible) format conversions: have to return a
// buffer with temporary data
//
// the functions defined (in either Unicode or ANSI) mode are mb_str() to
// return an ANSI (multibyte) string, wc_str() to return a wide string and
// fn_str() to return a string which should be used with the OS APIs
// accepting the file names. The return value is always the same, but the
// type differs because a function may either return pointer to the buffer
// directly or have to use intermediate buffer for translation.
#if wxUSE_UNICODE
// this is an optimization: even though using mb_str(wxConvLibc) does the
// same thing (i.e. returns pointer to internal representation as locale is
// always an UTF-8 one) in wxUSE_UTF8_LOCALE_ONLY case, we can avoid the
// extra checks and the temporary buffer construction by providing a
// separate mb_str() overload
#if wxUSE_UTF8_LOCALE_ONLY
const char* mb_str() const { return wx_str(); }
const wxScopedCharBuffer mb_str(const wxMBConv& conv) const
{
return AsCharBuf(conv);
}
#else // !wxUSE_UTF8_LOCALE_ONLY
const wxScopedCharBuffer mb_str(const wxMBConv& conv = wxConvLibc) const
{
return AsCharBuf(conv);
}
#endif // wxUSE_UTF8_LOCALE_ONLY/!wxUSE_UTF8_LOCALE_ONLY
const wxWX2MBbuf mbc_str() const { return mb_str(*wxConvCurrent); }
#if wxUSE_UNICODE_WCHAR
const wchar_t* wc_str() const { return wx_str(); }
#elif wxUSE_UNICODE_UTF8
const wxScopedWCharBuffer wc_str() const
{ return AsWCharBuf(wxMBConvStrictUTF8()); }
#endif
// for compatibility with !wxUSE_UNICODE version
const wxWX2WCbuf wc_str(const wxMBConv& WXUNUSED(conv)) const
{ return wc_str(); }
#if wxMBFILES
const wxScopedCharBuffer fn_str() const { return mb_str(wxConvFile); }
#else // !wxMBFILES
const wxWX2WCbuf fn_str() const { return wc_str(); }
#endif // wxMBFILES/!wxMBFILES
#else // ANSI
const char* mb_str() const { return wx_str(); }
// for compatibility with wxUSE_UNICODE version
const char* mb_str(const wxMBConv& WXUNUSED(conv)) const { return wx_str(); }
const wxWX2MBbuf mbc_str() const { return mb_str(); }
const wxScopedWCharBuffer wc_str(const wxMBConv& conv = wxConvLibc) const
{ return AsWCharBuf(conv); }
const wxScopedCharBuffer fn_str() const
{ return wxConvFile.cWC2WX( wc_str( wxConvLibc ) ); }
#endif // Unicode/ANSI
#if wxUSE_UNICODE_UTF8
const wxScopedWCharBuffer t_str() const { return wc_str(); }
#elif wxUSE_UNICODE_WCHAR
const wchar_t* t_str() const { return wx_str(); }
#else
const char* t_str() const { return wx_str(); }
#endif
// overloaded assignment
// from another wxString
wxString& operator=(const wxString& stringSrc)
{
if ( this != &stringSrc )
{
wxSTRING_INVALIDATE_CACHE();
m_impl = stringSrc.m_impl;
}
return *this;
}
wxString& operator=(const wxCStrData& cstr)
{ return *this = cstr.AsString(); }
// from a character
wxString& operator=(wxUniChar ch)
{
wxSTRING_INVALIDATE_CACHE();
#if wxUSE_UNICODE_UTF8
if ( !ch.IsAscii() )
m_impl = wxStringOperations::EncodeChar(ch);
else
#endif // wxUSE_UNICODE_UTF8
m_impl = (wxStringCharType)ch;
return *this;
}
wxString& operator=(wxUniCharRef ch)
{ return operator=((wxUniChar)ch); }
wxString& operator=(char ch)
{ return operator=(wxUniChar(ch)); }
wxString& operator=(unsigned char ch)
{ return operator=(wxUniChar(ch)); }
wxString& operator=(wchar_t ch)
{ return operator=(wxUniChar(ch)); }
// from a C string - STL probably will crash on NULL,
// so we need to compensate in that case
#if wxUSE_STL_BASED_WXSTRING
wxString& operator=(const char *psz)
{
wxSTRING_INVALIDATE_CACHE();
if ( psz )
m_impl = ImplStr(psz);
else
clear();
return *this;
}
wxString& operator=(const wchar_t *pwz)
{
wxSTRING_INVALIDATE_CACHE();
if ( pwz )
m_impl = ImplStr(pwz);
else
clear();
return *this;
}
#else // !wxUSE_STL_BASED_WXSTRING
wxString& operator=(const char *psz)
{
wxSTRING_INVALIDATE_CACHE();
m_impl = ImplStr(psz);
return *this;
}
wxString& operator=(const wchar_t *pwz)
{
wxSTRING_INVALIDATE_CACHE();
m_impl = ImplStr(pwz);
return *this;
}
#endif // wxUSE_STL_BASED_WXSTRING/!wxUSE_STL_BASED_WXSTRING
wxString& operator=(const unsigned char *psz)
{ return operator=((const char*)psz); }
// from wxScopedWCharBuffer
wxString& operator=(const wxScopedWCharBuffer& s)
{ return assign(s); }
// from wxScopedCharBuffer
wxString& operator=(const wxScopedCharBuffer& s)
{ return assign(s); }
// string concatenation
// in place concatenation
/*
Concatenate and return the result. Note that the left to right
associativity of << allows to write things like "str << str1 << str2
<< ..." (unlike with +=)
*/
// string += string
wxString& operator<<(const wxString& s)
{
#if WXWIN_COMPATIBILITY_2_8 && !wxUSE_STL_BASED_WXSTRING && !wxUSE_UNICODE_UTF8
wxASSERT_MSG( s.IsValid(),
wxT("did you forget to call UngetWriteBuf()?") );
#endif
append(s);
return *this;
}
// string += C string
wxString& operator<<(const char *psz)
{ append(psz); return *this; }
wxString& operator<<(const wchar_t *pwz)
{ append(pwz); return *this; }
wxString& operator<<(const wxCStrData& psz)
{ append(psz.AsString()); return *this; }
// string += char
wxString& operator<<(wxUniChar ch) { append(1, ch); return *this; }
wxString& operator<<(wxUniCharRef ch) { append(1, ch); return *this; }
wxString& operator<<(char ch) { append(1, ch); return *this; }
wxString& operator<<(unsigned char ch) { append(1, ch); return *this; }
wxString& operator<<(wchar_t ch) { append(1, ch); return *this; }
// string += buffer (i.e. from wxGetString)
wxString& operator<<(const wxScopedWCharBuffer& s)
{ return append(s); }
wxString& operator<<(const wxScopedCharBuffer& s)
{ return append(s); }
// string += C string
wxString& Append(const wxString& s)
{
// test for empty() to share the string if possible
if ( empty() )
*this = s;
else
append(s);
return *this;
}
wxString& Append(const char* psz)
{ append(psz); return *this; }
wxString& Append(const wchar_t* pwz)
{ append(pwz); return *this; }
wxString& Append(const wxCStrData& psz)
{ append(psz); return *this; }
wxString& Append(const wxScopedCharBuffer& psz)
{ append(psz); return *this; }
wxString& Append(const wxScopedWCharBuffer& psz)
{ append(psz); return *this; }
wxString& Append(const char* psz, size_t nLen)
{ append(psz, nLen); return *this; }
wxString& Append(const wchar_t* pwz, size_t nLen)
{ append(pwz, nLen); return *this; }
wxString& Append(const wxCStrData& psz, size_t nLen)
{ append(psz, nLen); return *this; }
wxString& Append(const wxScopedCharBuffer& psz, size_t nLen)
{ append(psz, nLen); return *this; }
wxString& Append(const wxScopedWCharBuffer& psz, size_t nLen)
{ append(psz, nLen); return *this; }
// append count copies of given character
wxString& Append(wxUniChar ch, size_t count = 1u)
{ append(count, ch); return *this; }
wxString& Append(wxUniCharRef ch, size_t count = 1u)
{ append(count, ch); return *this; }
wxString& Append(char ch, size_t count = 1u)
{ append(count, ch); return *this; }
wxString& Append(unsigned char ch, size_t count = 1u)
{ append(count, ch); return *this; }
wxString& Append(wchar_t ch, size_t count = 1u)
{ append(count, ch); return *this; }
// prepend a string, return the string itself
wxString& Prepend(const wxString& str)
{ *this = str + *this; return *this; }
// non-destructive concatenation
// two strings
friend wxString WXDLLIMPEXP_BASE operator+(const wxString& string1,
const wxString& string2);
// string with a single char
friend wxString WXDLLIMPEXP_BASE operator+(const wxString& string, wxUniChar ch);
// char with a string
friend wxString WXDLLIMPEXP_BASE operator+(wxUniChar ch, const wxString& string);
// string with C string
friend wxString WXDLLIMPEXP_BASE operator+(const wxString& string,
const char *psz);
friend wxString WXDLLIMPEXP_BASE operator+(const wxString& string,
const wchar_t *pwz);
// C string with string
friend wxString WXDLLIMPEXP_BASE operator+(const char *psz,
const wxString& string);
friend wxString WXDLLIMPEXP_BASE operator+(const wchar_t *pwz,
const wxString& string);
// stream-like functions
// insert an int into string
wxString& operator<<(int i)
{ return (*this) << Format(wxT("%d"), i); }
// insert an unsigned int into string
wxString& operator<<(unsigned int ui)
{ return (*this) << Format(wxT("%u"), ui); }
// insert a long into string
wxString& operator<<(long l)
{ return (*this) << Format(wxT("%ld"), l); }
// insert an unsigned long into string
wxString& operator<<(unsigned long ul)
{ return (*this) << Format(wxT("%lu"), ul); }
#ifdef wxHAS_LONG_LONG_T_DIFFERENT_FROM_LONG
// insert a long long if they exist and aren't longs
wxString& operator<<(wxLongLong_t ll)
{
return (*this) << Format("%" wxLongLongFmtSpec "d", ll);
}
// insert an unsigned long long
wxString& operator<<(wxULongLong_t ull)
{
return (*this) << Format("%" wxLongLongFmtSpec "u" , ull);
}
#endif // wxHAS_LONG_LONG_T_DIFFERENT_FROM_LONG
// insert a float into string
wxString& operator<<(float f)
{ return (*this) << Format(wxT("%f"), f); }
// insert a double into string
wxString& operator<<(double d)
{ return (*this) << Format(wxT("%g"), d); }
// string comparison
// case-sensitive comparison (returns a value < 0, = 0 or > 0)
int Cmp(const char *psz) const
{ return compare(psz); }
int Cmp(const wchar_t *pwz) const
{ return compare(pwz); }
int Cmp(const wxString& s) const
{ return compare(s); }
int Cmp(const wxCStrData& s) const
{ return compare(s); }
int Cmp(const wxScopedCharBuffer& s) const
{ return compare(s); }
int Cmp(const wxScopedWCharBuffer& s) const
{ return compare(s); }
// same as Cmp() but not case-sensitive
int CmpNoCase(const wxString& s) const;
// test for the string equality, either considering case or not
// (if compareWithCase then the case matters)
bool IsSameAs(const wxString& str, bool compareWithCase = true) const
{
#if !wxUSE_UNICODE_UTF8
// in UTF-8 build, length() is O(n) and doing this would be _slower_
if ( length() != str.length() )
return false;
#endif
return (compareWithCase ? Cmp(str) : CmpNoCase(str)) == 0;
}
bool IsSameAs(const char *str, bool compareWithCase = true) const
{ return (compareWithCase ? Cmp(str) : CmpNoCase(str)) == 0; }
bool IsSameAs(const wchar_t *str, bool compareWithCase = true) const
{ return (compareWithCase ? Cmp(str) : CmpNoCase(str)) == 0; }
bool IsSameAs(const wxCStrData& str, bool compareWithCase = true) const
{ return IsSameAs(str.AsString(), compareWithCase); }
bool IsSameAs(const wxScopedCharBuffer& str, bool compareWithCase = true) const
{ return IsSameAs(str.data(), compareWithCase); }
bool IsSameAs(const wxScopedWCharBuffer& str, bool compareWithCase = true) const
{ return IsSameAs(str.data(), compareWithCase); }
// comparison with a single character: returns true if equal
bool IsSameAs(wxUniChar c, bool compareWithCase = true) const;
// FIXME-UTF8: remove these overloads
bool IsSameAs(wxUniCharRef c, bool compareWithCase = true) const
{ return IsSameAs(wxUniChar(c), compareWithCase); }
bool IsSameAs(char c, bool compareWithCase = true) const
{ return IsSameAs(wxUniChar(c), compareWithCase); }
bool IsSameAs(unsigned char c, bool compareWithCase = true) const
{ return IsSameAs(wxUniChar(c), compareWithCase); }
bool IsSameAs(wchar_t c, bool compareWithCase = true) const
{ return IsSameAs(wxUniChar(c), compareWithCase); }
bool IsSameAs(int c, bool compareWithCase = true) const
{ return IsSameAs(wxUniChar(c), compareWithCase); }
// simple sub-string extraction
// return substring starting at nFirst of length nCount (or till the end
// if nCount = default value)
wxString Mid(size_t nFirst, size_t nCount = npos) const;
// operator version of Mid()
wxString operator()(size_t start, size_t len) const
{ return Mid(start, len); }
// check if the string starts with the given prefix and return the rest
// of the string in the provided pointer if it is not NULL; otherwise
// return false
bool StartsWith(const wxString& prefix, wxString *rest = NULL) const;
// check if the string ends with the given suffix and return the
// beginning of the string before the suffix in the provided pointer if
// it is not NULL; otherwise return false
bool EndsWith(const wxString& suffix, wxString *rest = NULL) const;
// get first nCount characters
wxString Left(size_t nCount) const;
// get last nCount characters
wxString Right(size_t nCount) const;
// get all characters before the first occurrence of ch
// (returns the whole string if ch not found) and also put everything
// following the first occurrence of ch into rest if it's non-NULL
wxString BeforeFirst(wxUniChar ch, wxString *rest = NULL) const;
// get all characters before the last occurrence of ch
// (returns empty string if ch not found) and also put everything
// following the last occurrence of ch into rest if it's non-NULL
wxString BeforeLast(wxUniChar ch, wxString *rest = NULL) const;
// get all characters after the first occurrence of ch
// (returns empty string if ch not found)
wxString AfterFirst(wxUniChar ch) const;
// get all characters after the last occurrence of ch
// (returns the whole string if ch not found)
wxString AfterLast(wxUniChar ch) const;
// for compatibility only, use more explicitly named functions above
wxString Before(wxUniChar ch) const { return BeforeLast(ch); }
wxString After(wxUniChar ch) const { return AfterFirst(ch); }
// case conversion
// convert to upper case in place, return the string itself
wxString& MakeUpper();
// convert to upper case, return the copy of the string
wxString Upper() const { return wxString(*this).MakeUpper(); }
// convert to lower case in place, return the string itself
wxString& MakeLower();
// convert to lower case, return the copy of the string
wxString Lower() const { return wxString(*this).MakeLower(); }
// convert the first character to the upper case and the rest to the
// lower one, return the modified string itself
wxString& MakeCapitalized();
// convert the first character to the upper case and the rest to the
// lower one, return the copy of the string
wxString Capitalize() const { return wxString(*this).MakeCapitalized(); }
// trimming/padding whitespace (either side) and truncating
// remove spaces from left or from right (default) side
wxString& Trim(bool bFromRight = true);
// add nCount copies chPad in the beginning or at the end (default)
wxString& Pad(size_t nCount, wxUniChar chPad = wxT(' '), bool bFromRight = true);
// searching and replacing
// searching (return starting index, or -1 if not found)
int Find(wxUniChar ch, bool bFromEnd = false) const; // like strchr/strrchr
int Find(wxUniCharRef ch, bool bFromEnd = false) const
{ return Find(wxUniChar(ch), bFromEnd); }
int Find(char ch, bool bFromEnd = false) const
{ return Find(wxUniChar(ch), bFromEnd); }
int Find(unsigned char ch, bool bFromEnd = false) const
{ return Find(wxUniChar(ch), bFromEnd); }
int Find(wchar_t ch, bool bFromEnd = false) const
{ return Find(wxUniChar(ch), bFromEnd); }
// searching (return starting index, or -1 if not found)
int Find(const wxString& sub) const // like strstr
{
size_type idx = find(sub);
return (idx == npos) ? wxNOT_FOUND : (int)idx;
}
int Find(const char *sub) const // like strstr
{
size_type idx = find(sub);
return (idx == npos) ? wxNOT_FOUND : (int)idx;
}
int Find(const wchar_t *sub) const // like strstr
{
size_type idx = find(sub);
return (idx == npos) ? wxNOT_FOUND : (int)idx;
}
int Find(const wxCStrData& sub) const
{ return Find(sub.AsString()); }
int Find(const wxScopedCharBuffer& sub) const
{ return Find(sub.data()); }
int Find(const wxScopedWCharBuffer& sub) const
{ return Find(sub.data()); }
// replace first (or all of bReplaceAll) occurrences of substring with
// another string, returns the number of replacements made
size_t Replace(const wxString& strOld,
const wxString& strNew,
bool bReplaceAll = true);
// check if the string contents matches a mask containing '*' and '?'
bool Matches(const wxString& mask) const;
// conversion to numbers: all functions return true only if the whole
// string is a number and put the value of this number into the pointer
// provided, the base is the numeric base in which the conversion should be
// done and must be comprised between 2 and 36 or be 0 in which case the
// standard C rules apply (leading '0' => octal, "0x" => hex)
// convert to a signed integer
bool ToLong(long *val, int base = 10) const;
// convert to an unsigned integer
bool ToULong(unsigned long *val, int base = 10) const;
// convert to wxLongLong
#if defined(wxLongLong_t)
bool ToLongLong(wxLongLong_t *val, int base = 10) const;
// convert to wxULongLong
bool ToULongLong(wxULongLong_t *val, int base = 10) const;
#endif // wxLongLong_t
// convert to a double
bool ToDouble(double *val) const;
// conversions to numbers using C locale
// convert to a signed integer
bool ToCLong(long *val, int base = 10) const;
// convert to an unsigned integer
bool ToCULong(unsigned long *val, int base = 10) const;
// convert to a double
bool ToCDouble(double *val) const;
// create a string representing the given floating point number with the
// default (like %g) or fixed (if precision >=0) precision
// in the current locale
static wxString FromDouble(double val, int precision = -1);
// in C locale
static wxString FromCDouble(double val, int precision = -1);
// formatted input/output
// as sprintf(), returns the number of characters written or < 0 on error
// (take 'this' into account in attribute parameter count)
// int Printf(const wxString& format, ...);
WX_DEFINE_VARARG_FUNC(int, Printf, 1, (const wxFormatString&),
DoPrintfWchar, DoPrintfUtf8)
// as vprintf(), returns the number of characters written or < 0 on error
int PrintfV(const wxString& format, va_list argptr);
// returns the string containing the result of Printf() to it
// static wxString Format(const wxString& format, ...) WX_ATTRIBUTE_PRINTF_1;
WX_DEFINE_VARARG_FUNC(static wxString, Format, 1, (const wxFormatString&),
DoFormatWchar, DoFormatUtf8)
// the same as above, but takes a va_list
static wxString FormatV(const wxString& format, va_list argptr);
// raw access to string memory
// ensure that string has space for at least nLen characters
// only works if the data of this string is not shared
bool Alloc(size_t nLen) { reserve(nLen); return capacity() >= nLen; }
// minimize the string's memory
// only works if the data of this string is not shared
bool Shrink();
#if WXWIN_COMPATIBILITY_2_8 && !wxUSE_STL_BASED_WXSTRING && !wxUSE_UNICODE_UTF8
// These are deprecated, use wxStringBuffer or wxStringBufferLength instead
//
// get writable buffer of at least nLen bytes. Unget() *must* be called
// a.s.a.p. to put string back in a reasonable state!
wxDEPRECATED( wxStringCharType *GetWriteBuf(size_t nLen) );
// call this immediately after GetWriteBuf() has been used
wxDEPRECATED( void UngetWriteBuf() );
wxDEPRECATED( void UngetWriteBuf(size_t nLen) );
#endif // WXWIN_COMPATIBILITY_2_8 && !wxUSE_STL_BASED_WXSTRING && wxUSE_UNICODE_UTF8
// wxWidgets version 1 compatibility functions
// use Mid()
wxString SubString(size_t from, size_t to) const
{ return Mid(from, (to - from + 1)); }
// values for second parameter of CompareTo function
enum caseCompare {exact, ignoreCase};
// values for first parameter of Strip function
enum stripType {leading = 0x1, trailing = 0x2, both = 0x3};
// use Printf()
// (take 'this' into account in attribute parameter count)
// int sprintf(const wxString& format, ...) WX_ATTRIBUTE_PRINTF_2;
WX_DEFINE_VARARG_FUNC(int, sprintf, 1, (const wxFormatString&),
DoPrintfWchar, DoPrintfUtf8)
// use Cmp()
int CompareTo(const wxChar* psz, caseCompare cmp = exact) const
{ return cmp == exact ? Cmp(psz) : CmpNoCase(psz); }
// use length()
size_t Length() const { return length(); }
// Count the number of characters
int Freq(wxUniChar ch) const;
// use MakeLower
void LowerCase() { MakeLower(); }
// use MakeUpper
void UpperCase() { MakeUpper(); }
// use Trim except that it doesn't change this string
wxString Strip(stripType w = trailing) const;
// use Find (more general variants not yet supported)
size_t Index(const wxChar* psz) const { return Find(psz); }
size_t Index(wxUniChar ch) const { return Find(ch); }
// use Truncate
wxString& Remove(size_t pos) { return Truncate(pos); }
wxString& RemoveLast(size_t n = 1) { return Truncate(length() - n); }
wxString& Remove(size_t nStart, size_t nLen)
{ return (wxString&)erase( nStart, nLen ); }
// use Find()
int First( wxUniChar ch ) const { return Find(ch); }
int First( wxUniCharRef ch ) const { return Find(ch); }
int First( char ch ) const { return Find(ch); }
int First( unsigned char ch ) const { return Find(ch); }
int First( wchar_t ch ) const { return Find(ch); }
int First( const wxString& str ) const { return Find(str); }
int Last( wxUniChar ch ) const { return Find(ch, true); }
bool Contains(const wxString& str) const { return Find(str) != wxNOT_FOUND; }
// use empty()
bool IsNull() const { return empty(); }
// std::string compatibility functions
// take nLen chars starting at nPos
wxString(const wxString& str, size_t nPos, size_t nLen)
{ assign(str, nPos, nLen); }
// take all characters from first to last
wxString(const_iterator first, const_iterator last)
: m_impl(first.impl(), last.impl()) { }
#if WXWIN_COMPATIBILITY_STRING_PTR_AS_ITER
// the 2 overloads below are for compatibility with the existing code using
// pointers instead of iterators
wxString(const char *first, const char *last)
{
SubstrBufFromMB str(ImplStr(first, last - first));
m_impl.assign(str.data, str.len);
}
wxString(const wchar_t *first, const wchar_t *last)
{
SubstrBufFromWC str(ImplStr(first, last - first));
m_impl.assign(str.data, str.len);
}
// and this one is needed to compile code adding offsets to c_str() result
wxString(const wxCStrData& first, const wxCStrData& last)
: m_impl(CreateConstIterator(first).impl(),
CreateConstIterator(last).impl())
{
wxASSERT_MSG( first.m_str == last.m_str,
wxT("pointers must be into the same string") );
}
#endif // WXWIN_COMPATIBILITY_STRING_PTR_AS_ITER
// lib.string.modifiers
// append elements str[pos], ..., str[pos+n]
wxString& append(const wxString& str, size_t pos, size_t n)
{
wxSTRING_UPDATE_CACHED_LENGTH(n);
size_t from, len;
str.PosLenToImpl(pos, n, &from, &len);
m_impl.append(str.m_impl, from, len);
return *this;
}
// append a string
wxString& append(const wxString& str)
{
wxSTRING_UPDATE_CACHED_LENGTH(str.length());
m_impl.append(str.m_impl);
return *this;
}
// append first n (or all if n == npos) characters of sz
wxString& append(const char *sz)
{
wxSTRING_INVALIDATE_CACHED_LENGTH();
m_impl.append(ImplStr(sz));
return *this;
}
wxString& append(const wchar_t *sz)
{
wxSTRING_INVALIDATE_CACHED_LENGTH();
m_impl.append(ImplStr(sz));
return *this;
}
wxString& append(const char *sz, size_t n)
{
wxSTRING_INVALIDATE_CACHED_LENGTH();
SubstrBufFromMB str(ImplStr(sz, n));
m_impl.append(str.data, str.len);
return *this;
}
wxString& append(const wchar_t *sz, size_t n)
{
wxSTRING_UPDATE_CACHED_LENGTH(n);
SubstrBufFromWC str(ImplStr(sz, n));
m_impl.append(str.data, str.len);
return *this;
}
wxString& append(const wxCStrData& str)
{ return append(str.AsString()); }
wxString& append(const wxScopedCharBuffer& str)
{ return append(str.data(), str.length()); }
wxString& append(const wxScopedWCharBuffer& str)
{ return append(str.data(), str.length()); }
wxString& append(const wxCStrData& str, size_t n)
{ return append(str.AsString(), 0, n); }
wxString& append(const wxScopedCharBuffer& str, size_t n)
{ return append(str.data(), n); }
wxString& append(const wxScopedWCharBuffer& str, size_t n)
{ return append(str.data(), n); }
// append n copies of ch
wxString& append(size_t n, wxUniChar ch)
{
#if wxUSE_UNICODE_UTF8
if ( !ch.IsAscii() )
{
wxSTRING_INVALIDATE_CACHED_LENGTH();
m_impl.append(wxStringOperations::EncodeNChars(n, ch));
}
else // ASCII
#endif
{
wxSTRING_UPDATE_CACHED_LENGTH(n);
m_impl.append(n, (wxStringCharType)ch);
}
return *this;
}
wxString& append(size_t n, wxUniCharRef ch)
{ return append(n, wxUniChar(ch)); }
wxString& append(size_t n, char ch)
{ return append(n, wxUniChar(ch)); }
wxString& append(size_t n, unsigned char ch)
{ return append(n, wxUniChar(ch)); }
wxString& append(size_t n, wchar_t ch)
{ return append(n, wxUniChar(ch)); }
// append from first to last
wxString& append(const_iterator first, const_iterator last)
{
wxSTRING_INVALIDATE_CACHED_LENGTH();
m_impl.append(first.impl(), last.impl());
return *this;
}
#if WXWIN_COMPATIBILITY_STRING_PTR_AS_ITER
wxString& append(const char *first, const char *last)
{ return append(first, last - first); }
wxString& append(const wchar_t *first, const wchar_t *last)
{ return append(first, last - first); }
wxString& append(const wxCStrData& first, const wxCStrData& last)
{ return append(CreateConstIterator(first), CreateConstIterator(last)); }
#endif // WXWIN_COMPATIBILITY_STRING_PTR_AS_ITER
// same as `this_string = str'
wxString& assign(const wxString& str)
{
wxSTRING_SET_CACHED_LENGTH(str.length());
m_impl = str.m_impl;
return *this;
}
// This is a non-standard-compliant overload taking the first "len"
// characters of the source string.
wxString& assign(const wxString& str, size_t len)
{
#if wxUSE_STRING_POS_CACHE
// It is legal to pass len > str.length() to wxStringImpl::assign() but
// by restricting it here we save some work for that function so it's not
// really less efficient and, at the same time, ensure that we don't
// cache invalid length.
const size_t lenSrc = str.length();
if ( len > lenSrc )
len = lenSrc;
wxSTRING_SET_CACHED_LENGTH(len);
#endif // wxUSE_STRING_POS_CACHE
m_impl.assign(str.m_impl, 0, str.LenToImpl(len));
return *this;
}
// same as ` = str[pos..pos + n]
wxString& assign(const wxString& str, size_t pos, size_t n)
{
size_t from, len;
str.PosLenToImpl(pos, n, &from, &len);
m_impl.assign(str.m_impl, from, len);
// it's important to call this after PosLenToImpl() above in case str is
// the same string as this one
wxSTRING_SET_CACHED_LENGTH(n);
return *this;
}
// same as `= first n (or all if n == npos) characters of sz'
wxString& assign(const char *sz)
{
wxSTRING_INVALIDATE_CACHE();
m_impl.assign(ImplStr(sz));
return *this;
}
wxString& assign(const wchar_t *sz)
{
wxSTRING_INVALIDATE_CACHE();
m_impl.assign(ImplStr(sz));
return *this;
}
wxString& assign(const char *sz, size_t n)
{
wxSTRING_INVALIDATE_CACHE();
SubstrBufFromMB str(ImplStr(sz, n));
m_impl.assign(str.data, str.len);
return *this;
}
wxString& assign(const wchar_t *sz, size_t n)
{
wxSTRING_SET_CACHED_LENGTH(n);
SubstrBufFromWC str(ImplStr(sz, n));
m_impl.assign(str.data, str.len);
return *this;
}
wxString& assign(const wxCStrData& str)
{ return assign(str.AsString()); }
wxString& assign(const wxScopedCharBuffer& str)
{ return assign(str.data(), str.length()); }
wxString& assign(const wxScopedWCharBuffer& str)
{ return assign(str.data(), str.length()); }
wxString& assign(const wxCStrData& str, size_t len)
{ return assign(str.AsString(), len); }
wxString& assign(const wxScopedCharBuffer& str, size_t len)
{ return assign(str.data(), len); }
wxString& assign(const wxScopedWCharBuffer& str, size_t len)
{ return assign(str.data(), len); }
// same as `= n copies of ch'
wxString& assign(size_t n, wxUniChar ch)
{
wxSTRING_SET_CACHED_LENGTH(n);
#if wxUSE_UNICODE_UTF8
if ( !ch.IsAscii() )
m_impl.assign(wxStringOperations::EncodeNChars(n, ch));
else
#endif
m_impl.assign(n, (wxStringCharType)ch);
return *this;
}
wxString& assign(size_t n, wxUniCharRef ch)
{ return assign(n, wxUniChar(ch)); }
wxString& assign(size_t n, char ch)
{ return assign(n, wxUniChar(ch)); }
wxString& assign(size_t n, unsigned char ch)
{ return assign(n, wxUniChar(ch)); }
wxString& assign(size_t n, wchar_t ch)
{ return assign(n, wxUniChar(ch)); }
// assign from first to last
wxString& assign(const_iterator first, const_iterator last)
{
wxSTRING_INVALIDATE_CACHE();
m_impl.assign(first.impl(), last.impl());
return *this;
}
#if WXWIN_COMPATIBILITY_STRING_PTR_AS_ITER
wxString& assign(const char *first, const char *last)
{ return assign(first, last - first); }
wxString& assign(const wchar_t *first, const wchar_t *last)
{ return assign(first, last - first); }
wxString& assign(const wxCStrData& first, const wxCStrData& last)
{ return assign(CreateConstIterator(first), CreateConstIterator(last)); }
#endif // WXWIN_COMPATIBILITY_STRING_PTR_AS_ITER
// string comparison
int compare(const wxString& str) const;
int compare(const char* sz) const;
int compare(const wchar_t* sz) const;
int compare(const wxCStrData& str) const
{ return compare(str.AsString()); }
int compare(const wxScopedCharBuffer& str) const
{ return compare(str.data()); }
int compare(const wxScopedWCharBuffer& str) const
{ return compare(str.data()); }
// comparison with a substring
int compare(size_t nStart, size_t nLen, const wxString& str) const;
// comparison of 2 substrings
int compare(size_t nStart, size_t nLen,
const wxString& str, size_t nStart2, size_t nLen2) const;
// substring comparison with first nCount characters of sz
int compare(size_t nStart, size_t nLen,
const char* sz, size_t nCount = npos) const;
int compare(size_t nStart, size_t nLen,
const wchar_t* sz, size_t nCount = npos) const;
// insert another string
wxString& insert(size_t nPos, const wxString& str)
{ insert(GetIterForNthChar(nPos), str.begin(), str.end()); return *this; }
// insert n chars of str starting at nStart (in str)
wxString& insert(size_t nPos, const wxString& str, size_t nStart, size_t n)
{
wxSTRING_UPDATE_CACHED_LENGTH(n);
size_t from, len;
str.PosLenToImpl(nStart, n, &from, &len);
m_impl.insert(PosToImpl(nPos), str.m_impl, from, len);
return *this;
}
// insert first n (or all if n == npos) characters of sz
wxString& insert(size_t nPos, const char *sz)
{
wxSTRING_INVALIDATE_CACHE();
m_impl.insert(PosToImpl(nPos), ImplStr(sz));
return *this;
}
wxString& insert(size_t nPos, const wchar_t *sz)
{
wxSTRING_INVALIDATE_CACHE();
m_impl.insert(PosToImpl(nPos), ImplStr(sz)); return *this;
}
wxString& insert(size_t nPos, const char *sz, size_t n)
{
wxSTRING_UPDATE_CACHED_LENGTH(n);
SubstrBufFromMB str(ImplStr(sz, n));
m_impl.insert(PosToImpl(nPos), str.data, str.len);
return *this;
}
wxString& insert(size_t nPos, const wchar_t *sz, size_t n)
{
wxSTRING_UPDATE_CACHED_LENGTH(n);
SubstrBufFromWC str(ImplStr(sz, n));
m_impl.insert(PosToImpl(nPos), str.data, str.len);
return *this;
}
// insert n copies of ch
wxString& insert(size_t nPos, size_t n, wxUniChar ch)
{
wxSTRING_UPDATE_CACHED_LENGTH(n);
#if wxUSE_UNICODE_UTF8
if ( !ch.IsAscii() )
m_impl.insert(PosToImpl(nPos), wxStringOperations::EncodeNChars(n, ch));
else
#endif
m_impl.insert(PosToImpl(nPos), n, (wxStringCharType)ch);
return *this;
}
iterator insert(iterator it, wxUniChar ch)
{
wxSTRING_UPDATE_CACHED_LENGTH(1);
#if wxUSE_UNICODE_UTF8
if ( !ch.IsAscii() )
{
size_t pos = IterToImplPos(it);
m_impl.insert(pos, wxStringOperations::EncodeChar(ch));
return iterator(this, m_impl.begin() + pos);
}
else
#endif
return iterator(this, m_impl.insert(it.impl(), (wxStringCharType)ch));
}
void insert(iterator it, const_iterator first, const_iterator last)
{
wxSTRING_INVALIDATE_CACHE();
m_impl.insert(it.impl(), first.impl(), last.impl());
}
#if WXWIN_COMPATIBILITY_STRING_PTR_AS_ITER
void insert(iterator it, const char *first, const char *last)
{ insert(it - begin(), first, last - first); }
void insert(iterator it, const wchar_t *first, const wchar_t *last)
{ insert(it - begin(), first, last - first); }
void insert(iterator it, const wxCStrData& first, const wxCStrData& last)
{ insert(it, CreateConstIterator(first), CreateConstIterator(last)); }
#endif // WXWIN_COMPATIBILITY_STRING_PTR_AS_ITER
void insert(iterator it, size_type n, wxUniChar ch)
{
wxSTRING_UPDATE_CACHED_LENGTH(n);
#if wxUSE_UNICODE_UTF8
if ( !ch.IsAscii() )
m_impl.insert(IterToImplPos(it), wxStringOperations::EncodeNChars(n, ch));
else
#endif
m_impl.insert(it.impl(), n, (wxStringCharType)ch);
}
// delete characters from nStart to nStart + nLen
wxString& erase(size_type pos = 0, size_type n = npos)
{
wxSTRING_INVALIDATE_CACHE();
size_t from, len;
PosLenToImpl(pos, n, &from, &len);
m_impl.erase(from, len);
return *this;
}
// delete characters from first up to last
iterator erase(iterator first, iterator last)
{
wxSTRING_INVALIDATE_CACHE();
return iterator(this, m_impl.erase(first.impl(), last.impl()));
}
iterator erase(iterator first)
{
wxSTRING_UPDATE_CACHED_LENGTH(-1);
return iterator(this, m_impl.erase(first.impl()));
}
void clear()
{
wxSTRING_SET_CACHED_LENGTH(0);
m_impl.clear();
}
// replaces the substring of length nLen starting at nStart
wxString& replace(size_t nStart, size_t nLen, const char* sz)
{
wxSTRING_INVALIDATE_CACHE();
size_t from, len;
PosLenToImpl(nStart, nLen, &from, &len);
m_impl.replace(from, len, ImplStr(sz));
return *this;
}
wxString& replace(size_t nStart, size_t nLen, const wchar_t* sz)
{
wxSTRING_INVALIDATE_CACHE();
size_t from, len;
PosLenToImpl(nStart, nLen, &from, &len);
m_impl.replace(from, len, ImplStr(sz));
return *this;
}
// replaces the substring of length nLen starting at nStart
wxString& replace(size_t nStart, size_t nLen, const wxString& str)
{
wxSTRING_INVALIDATE_CACHE();
size_t from, len;
PosLenToImpl(nStart, nLen, &from, &len);
m_impl.replace(from, len, str.m_impl);
return *this;
}
// replaces the substring with nCount copies of ch
wxString& replace(size_t nStart, size_t nLen, size_t nCount, wxUniChar ch)
{
wxSTRING_INVALIDATE_CACHE();
size_t from, len;
PosLenToImpl(nStart, nLen, &from, &len);
#if wxUSE_UNICODE_UTF8
if ( !ch.IsAscii() )
m_impl.replace(from, len, wxStringOperations::EncodeNChars(nCount, ch));
else
#endif
m_impl.replace(from, len, nCount, (wxStringCharType)ch);
return *this;
}
// replaces a substring with another substring
wxString& replace(size_t nStart, size_t nLen,
const wxString& str, size_t nStart2, size_t nLen2)
{
wxSTRING_INVALIDATE_CACHE();
size_t from, len;
PosLenToImpl(nStart, nLen, &from, &len);
size_t from2, len2;
str.PosLenToImpl(nStart2, nLen2, &from2, &len2);
m_impl.replace(from, len, str.m_impl, from2, len2);
return *this;
}
// replaces the substring with first nCount chars of sz
wxString& replace(size_t nStart, size_t nLen,
const char* sz, size_t nCount)
{
wxSTRING_INVALIDATE_CACHE();
size_t from, len;
PosLenToImpl(nStart, nLen, &from, &len);
SubstrBufFromMB str(ImplStr(sz, nCount));
m_impl.replace(from, len, str.data, str.len);
return *this;
}
wxString& replace(size_t nStart, size_t nLen,
const wchar_t* sz, size_t nCount)
{
wxSTRING_INVALIDATE_CACHE();
size_t from, len;
PosLenToImpl(nStart, nLen, &from, &len);
SubstrBufFromWC str(ImplStr(sz, nCount));
m_impl.replace(from, len, str.data, str.len);
return *this;
}
wxString& replace(size_t nStart, size_t nLen,
const wxString& s, size_t nCount)
{
wxSTRING_INVALIDATE_CACHE();
size_t from, len;
PosLenToImpl(nStart, nLen, &from, &len);
m_impl.replace(from, len, s.m_impl.c_str(), s.LenToImpl(nCount));
return *this;
}
wxString& replace(iterator first, iterator last, const char* s)
{
wxSTRING_INVALIDATE_CACHE();
m_impl.replace(first.impl(), last.impl(), ImplStr(s));
return *this;
}
wxString& replace(iterator first, iterator last, const wchar_t* s)
{
wxSTRING_INVALIDATE_CACHE();
m_impl.replace(first.impl(), last.impl(), ImplStr(s));
return *this;
}
wxString& replace(iterator first, iterator last, const char* s, size_type n)
{
wxSTRING_INVALIDATE_CACHE();
SubstrBufFromMB str(ImplStr(s, n));
m_impl.replace(first.impl(), last.impl(), str.data, str.len);
return *this;
}
wxString& replace(iterator first, iterator last, const wchar_t* s, size_type n)
{
wxSTRING_INVALIDATE_CACHE();
SubstrBufFromWC str(ImplStr(s, n));
m_impl.replace(first.impl(), last.impl(), str.data, str.len);
return *this;
}
wxString& replace(iterator first, iterator last, const wxString& s)
{
wxSTRING_INVALIDATE_CACHE();
m_impl.replace(first.impl(), last.impl(), s.m_impl);
return *this;
}
wxString& replace(iterator first, iterator last, size_type n, wxUniChar ch)
{
wxSTRING_INVALIDATE_CACHE();
#if wxUSE_UNICODE_UTF8
if ( !ch.IsAscii() )
m_impl.replace(first.impl(), last.impl(),
wxStringOperations::EncodeNChars(n, ch));
else
#endif
m_impl.replace(first.impl(), last.impl(), n, (wxStringCharType)ch);
return *this;
}
wxString& replace(iterator first, iterator last,
const_iterator first1, const_iterator last1)
{
wxSTRING_INVALIDATE_CACHE();
m_impl.replace(first.impl(), last.impl(), first1.impl(), last1.impl());
return *this;
}
wxString& replace(iterator first, iterator last,
const char *first1, const char *last1)
{ replace(first, last, first1, last1 - first1); return *this; }
wxString& replace(iterator first, iterator last,
const wchar_t *first1, const wchar_t *last1)
{ replace(first, last, first1, last1 - first1); return *this; }
// swap two strings
void swap(wxString& str)
{
#if wxUSE_STRING_POS_CACHE
// we modify not only this string but also the other one directly so we
// need to invalidate cache for both of them (we could also try to
// exchange their cache entries but it seems unlikely to be worth it)
InvalidateCache();
str.InvalidateCache();
#endif // wxUSE_STRING_POS_CACHE
m_impl.swap(str.m_impl);
}
// find a substring
size_t find(const wxString& str, size_t nStart = 0) const
{ return PosFromImpl(m_impl.find(str.m_impl, PosToImpl(nStart))); }
// find first n characters of sz
size_t find(const char* sz, size_t nStart = 0, size_t n = npos) const
{
SubstrBufFromMB str(ImplStr(sz, n));
return PosFromImpl(m_impl.find(str.data, PosToImpl(nStart), str.len));
}
size_t find(const wchar_t* sz, size_t nStart = 0, size_t n = npos) const
{
SubstrBufFromWC str(ImplStr(sz, n));
return PosFromImpl(m_impl.find(str.data, PosToImpl(nStart), str.len));
}
size_t find(const wxScopedCharBuffer& s, size_t nStart = 0, size_t n = npos) const
{ return find(s.data(), nStart, n); }
size_t find(const wxScopedWCharBuffer& s, size_t nStart = 0, size_t n = npos) const
{ return find(s.data(), nStart, n); }
size_t find(const wxCStrData& s, size_t nStart = 0, size_t n = npos) const
{ return find(s.AsWChar(), nStart, n); }
// find the first occurrence of character ch after nStart
size_t find(wxUniChar ch, size_t nStart = 0) const
{
#if wxUSE_UNICODE_UTF8
if ( !ch.IsAscii() )
return PosFromImpl(m_impl.find(wxStringOperations::EncodeChar(ch),
PosToImpl(nStart)));
else
#endif
return PosFromImpl(m_impl.find((wxStringCharType)ch,
PosToImpl(nStart)));
}
size_t find(wxUniCharRef ch, size_t nStart = 0) const
{ return find(wxUniChar(ch), nStart); }
size_t find(char ch, size_t nStart = 0) const
{ return find(wxUniChar(ch), nStart); }
size_t find(unsigned char ch, size_t nStart = 0) const
{ return find(wxUniChar(ch), nStart); }
size_t find(wchar_t ch, size_t nStart = 0) const
{ return find(wxUniChar(ch), nStart); }
// rfind() family is exactly like find() but works right to left
// as find, but from the end
size_t rfind(const wxString& str, size_t nStart = npos) const
{ return PosFromImpl(m_impl.rfind(str.m_impl, PosToImpl(nStart))); }
// as find, but from the end
size_t rfind(const char* sz, size_t nStart = npos, size_t n = npos) const
{
SubstrBufFromMB str(ImplStr(sz, n));
return PosFromImpl(m_impl.rfind(str.data, PosToImpl(nStart), str.len));
}
size_t rfind(const wchar_t* sz, size_t nStart = npos, size_t n = npos) const
{
SubstrBufFromWC str(ImplStr(sz, n));
return PosFromImpl(m_impl.rfind(str.data, PosToImpl(nStart), str.len));
}
size_t rfind(const wxScopedCharBuffer& s, size_t nStart = npos, size_t n = npos) const
{ return rfind(s.data(), nStart, n); }
size_t rfind(const wxScopedWCharBuffer& s, size_t nStart = npos, size_t n = npos) const
{ return rfind(s.data(), nStart, n); }
size_t rfind(const wxCStrData& s, size_t nStart = npos, size_t n = npos) const
{ return rfind(s.AsWChar(), nStart, n); }
// as find, but from the end
size_t rfind(wxUniChar ch, size_t nStart = npos) const
{
#if wxUSE_UNICODE_UTF8
if ( !ch.IsAscii() )
return PosFromImpl(m_impl.rfind(wxStringOperations::EncodeChar(ch),
PosToImpl(nStart)));
else
#endif
return PosFromImpl(m_impl.rfind((wxStringCharType)ch,
PosToImpl(nStart)));
}
size_t rfind(wxUniCharRef ch, size_t nStart = npos) const
{ return rfind(wxUniChar(ch), nStart); }
size_t rfind(char ch, size_t nStart = npos) const
{ return rfind(wxUniChar(ch), nStart); }
size_t rfind(unsigned char ch, size_t nStart = npos) const
{ return rfind(wxUniChar(ch), nStart); }
size_t rfind(wchar_t ch, size_t nStart = npos) const
{ return rfind(wxUniChar(ch), nStart); }
// find first/last occurrence of any character (not) in the set:
#if wxUSE_STL_BASED_WXSTRING && !wxUSE_UNICODE_UTF8
// FIXME-UTF8: this is not entirely correct, because it doesn't work if
// sizeof(wchar_t)==2 and surrogates are present in the string;
// should we care? Probably not.
size_t find_first_of(const wxString& str, size_t nStart = 0) const
{ return m_impl.find_first_of(str.m_impl, nStart); }
size_t find_first_of(const char* sz, size_t nStart = 0) const
{ return m_impl.find_first_of(ImplStr(sz), nStart); }
size_t find_first_of(const wchar_t* sz, size_t nStart = 0) const
{ return m_impl.find_first_of(ImplStr(sz), nStart); }
size_t find_first_of(const char* sz, size_t nStart, size_t n) const
{ return m_impl.find_first_of(ImplStr(sz), nStart, n); }
size_t find_first_of(const wchar_t* sz, size_t nStart, size_t n) const
{ return m_impl.find_first_of(ImplStr(sz), nStart, n); }
size_t find_first_of(wxUniChar c, size_t nStart = 0) const
{ return m_impl.find_first_of((wxChar)c, nStart); }
size_t find_last_of(const wxString& str, size_t nStart = npos) const
{ return m_impl.find_last_of(str.m_impl, nStart); }
size_t find_last_of(const char* sz, size_t nStart = npos) const
{ return m_impl.find_last_of(ImplStr(sz), nStart); }
size_t find_last_of(const wchar_t* sz, size_t nStart = npos) const
{ return m_impl.find_last_of(ImplStr(sz), nStart); }
size_t find_last_of(const char* sz, size_t nStart, size_t n) const
{ return m_impl.find_last_of(ImplStr(sz), nStart, n); }
size_t find_last_of(const wchar_t* sz, size_t nStart, size_t n) const
{ return m_impl.find_last_of(ImplStr(sz), nStart, n); }
size_t find_last_of(wxUniChar c, size_t nStart = npos) const
{ return m_impl.find_last_of((wxChar)c, nStart); }
size_t find_first_not_of(const wxString& str, size_t nStart = 0) const
{ return m_impl.find_first_not_of(str.m_impl, nStart); }
size_t find_first_not_of(const char* sz, size_t nStart = 0) const
{ return m_impl.find_first_not_of(ImplStr(sz), nStart); }
size_t find_first_not_of(const wchar_t* sz, size_t nStart = 0) const
{ return m_impl.find_first_not_of(ImplStr(sz), nStart); }
size_t find_first_not_of(const char* sz, size_t nStart, size_t n) const
{ return m_impl.find_first_not_of(ImplStr(sz), nStart, n); }
size_t find_first_not_of(const wchar_t* sz, size_t nStart, size_t n) const
{ return m_impl.find_first_not_of(ImplStr(sz), nStart, n); }
size_t find_first_not_of(wxUniChar c, size_t nStart = 0) const
{ return m_impl.find_first_not_of((wxChar)c, nStart); }
size_t find_last_not_of(const wxString& str, size_t nStart = npos) const
{ return m_impl.find_last_not_of(str.m_impl, nStart); }
size_t find_last_not_of(const char* sz, size_t nStart = npos) const
{ return m_impl.find_last_not_of(ImplStr(sz), nStart); }
size_t find_last_not_of(const wchar_t* sz, size_t nStart = npos) const
{ return m_impl.find_last_not_of(ImplStr(sz), nStart); }
size_t find_last_not_of(const char* sz, size_t nStart, size_t n) const
{ return m_impl.find_last_not_of(ImplStr(sz), nStart, n); }
size_t find_last_not_of(const wchar_t* sz, size_t nStart, size_t n) const
{ return m_impl.find_last_not_of(ImplStr(sz), nStart, n); }
size_t find_last_not_of(wxUniChar c, size_t nStart = npos) const
{ return m_impl.find_last_not_of((wxChar)c, nStart); }
#else
// we can't use std::string implementation in UTF-8 build, because the
// character sets would be interpreted wrongly:
// as strpbrk() but starts at nStart, returns npos if not found
size_t find_first_of(const wxString& str, size_t nStart = 0) const
#if wxUSE_UNICODE // FIXME-UTF8: temporary
{ return find_first_of(str.wc_str(), nStart); }
#else
{ return find_first_of(str.mb_str(), nStart); }
#endif
// same as above
size_t find_first_of(const char* sz, size_t nStart = 0) const;
size_t find_first_of(const wchar_t* sz, size_t nStart = 0) const;
size_t find_first_of(const char* sz, size_t nStart, size_t n) const;
size_t find_first_of(const wchar_t* sz, size_t nStart, size_t n) const;
// same as find(char, size_t)
size_t find_first_of(wxUniChar c, size_t nStart = 0) const
{ return find(c, nStart); }
// find the last (starting from nStart) char from str in this string
size_t find_last_of (const wxString& str, size_t nStart = npos) const
#if wxUSE_UNICODE // FIXME-UTF8: temporary
{ return find_last_of(str.wc_str(), nStart); }
#else
{ return find_last_of(str.mb_str(), nStart); }
#endif
// same as above
size_t find_last_of (const char* sz, size_t nStart = npos) const;
size_t find_last_of (const wchar_t* sz, size_t nStart = npos) const;
size_t find_last_of(const char* sz, size_t nStart, size_t n) const;
size_t find_last_of(const wchar_t* sz, size_t nStart, size_t n) const;
// same as above
size_t find_last_of(wxUniChar c, size_t nStart = npos) const
{ return rfind(c, nStart); }
// find first/last occurrence of any character not in the set
// as strspn() (starting from nStart), returns npos on failure
size_t find_first_not_of(const wxString& str, size_t nStart = 0) const
#if wxUSE_UNICODE // FIXME-UTF8: temporary
{ return find_first_not_of(str.wc_str(), nStart); }
#else
{ return find_first_not_of(str.mb_str(), nStart); }
#endif
// same as above
size_t find_first_not_of(const char* sz, size_t nStart = 0) const;
size_t find_first_not_of(const wchar_t* sz, size_t nStart = 0) const;
size_t find_first_not_of(const char* sz, size_t nStart, size_t n) const;
size_t find_first_not_of(const wchar_t* sz, size_t nStart, size_t n) const;
// same as above
size_t find_first_not_of(wxUniChar ch, size_t nStart = 0) const;
// as strcspn()
size_t find_last_not_of(const wxString& str, size_t nStart = npos) const
#if wxUSE_UNICODE // FIXME-UTF8: temporary
{ return find_last_not_of(str.wc_str(), nStart); }
#else
{ return find_last_not_of(str.mb_str(), nStart); }
#endif
// same as above
size_t find_last_not_of(const char* sz, size_t nStart = npos) const;
size_t find_last_not_of(const wchar_t* sz, size_t nStart = npos) const;
size_t find_last_not_of(const char* sz, size_t nStart, size_t n) const;
size_t find_last_not_of(const wchar_t* sz, size_t nStart, size_t n) const;
// same as above
size_t find_last_not_of(wxUniChar ch, size_t nStart = npos) const;
#endif // wxUSE_STL_BASED_WXSTRING && !wxUSE_UNICODE_UTF8 or not
// provide char/wchar_t/wxUniCharRef overloads for char-finding functions
// above to resolve ambiguities:
size_t find_first_of(wxUniCharRef ch, size_t nStart = 0) const
{ return find_first_of(wxUniChar(ch), nStart); }
size_t find_first_of(char ch, size_t nStart = 0) const
{ return find_first_of(wxUniChar(ch), nStart); }
size_t find_first_of(unsigned char ch, size_t nStart = 0) const
{ return find_first_of(wxUniChar(ch), nStart); }
size_t find_first_of(wchar_t ch, size_t nStart = 0) const
{ return find_first_of(wxUniChar(ch), nStart); }
size_t find_last_of(wxUniCharRef ch, size_t nStart = npos) const
{ return find_last_of(wxUniChar(ch), nStart); }
size_t find_last_of(char ch, size_t nStart = npos) const
{ return find_last_of(wxUniChar(ch), nStart); }
size_t find_last_of(unsigned char ch, size_t nStart = npos) const
{ return find_last_of(wxUniChar(ch), nStart); }
size_t find_last_of(wchar_t ch, size_t nStart = npos) const
{ return find_last_of(wxUniChar(ch), nStart); }
size_t find_first_not_of(wxUniCharRef ch, size_t nStart = 0) const
{ return find_first_not_of(wxUniChar(ch), nStart); }
size_t find_first_not_of(char ch, size_t nStart = 0) const
{ return find_first_not_of(wxUniChar(ch), nStart); }
size_t find_first_not_of(unsigned char ch, size_t nStart = 0) const
{ return find_first_not_of(wxUniChar(ch), nStart); }
size_t find_first_not_of(wchar_t ch, size_t nStart = 0) const
{ return find_first_not_of(wxUniChar(ch), nStart); }
size_t find_last_not_of(wxUniCharRef ch, size_t nStart = npos) const
{ return find_last_not_of(wxUniChar(ch), nStart); }
size_t find_last_not_of(char ch, size_t nStart = npos) const
{ return find_last_not_of(wxUniChar(ch), nStart); }
size_t find_last_not_of(unsigned char ch, size_t nStart = npos) const
{ return find_last_not_of(wxUniChar(ch), nStart); }
size_t find_last_not_of(wchar_t ch, size_t nStart = npos) const
{ return find_last_not_of(wxUniChar(ch), nStart); }
// and additional overloads for the versions taking strings:
size_t find_first_of(const wxCStrData& sz, size_t nStart = 0) const
{ return find_first_of(sz.AsString(), nStart); }
size_t find_first_of(const wxScopedCharBuffer& sz, size_t nStart = 0) const
{ return find_first_of(sz.data(), nStart); }
size_t find_first_of(const wxScopedWCharBuffer& sz, size_t nStart = 0) const
{ return find_first_of(sz.data(), nStart); }
size_t find_first_of(const wxCStrData& sz, size_t nStart, size_t n) const
{ return find_first_of(sz.AsWChar(), nStart, n); }
size_t find_first_of(const wxScopedCharBuffer& sz, size_t nStart, size_t n) const
{ return find_first_of(sz.data(), nStart, n); }
size_t find_first_of(const wxScopedWCharBuffer& sz, size_t nStart, size_t n) const
{ return find_first_of(sz.data(), nStart, n); }
size_t find_last_of(const wxCStrData& sz, size_t nStart = 0) const
{ return find_last_of(sz.AsString(), nStart); }
size_t find_last_of(const wxScopedCharBuffer& sz, size_t nStart = 0) const
{ return find_last_of(sz.data(), nStart); }
size_t find_last_of(const wxScopedWCharBuffer& sz, size_t nStart = 0) const
{ return find_last_of(sz.data(), nStart); }
size_t find_last_of(const wxCStrData& sz, size_t nStart, size_t n) const
{ return find_last_of(sz.AsWChar(), nStart, n); }
size_t find_last_of(const wxScopedCharBuffer& sz, size_t nStart, size_t n) const
{ return find_last_of(sz.data(), nStart, n); }
size_t find_last_of(const wxScopedWCharBuffer& sz, size_t nStart, size_t n) const
{ return find_last_of(sz.data(), nStart, n); }
size_t find_first_not_of(const wxCStrData& sz, size_t nStart = 0) const
{ return find_first_not_of(sz.AsString(), nStart); }
size_t find_first_not_of(const wxScopedCharBuffer& sz, size_t nStart = 0) const
{ return find_first_not_of(sz.data(), nStart); }
size_t find_first_not_of(const wxScopedWCharBuffer& sz, size_t nStart = 0) const
{ return find_first_not_of(sz.data(), nStart); }
size_t find_first_not_of(const wxCStrData& sz, size_t nStart, size_t n) const
{ return find_first_not_of(sz.AsWChar(), nStart, n); }
size_t find_first_not_of(const wxScopedCharBuffer& sz, size_t nStart, size_t n) const
{ return find_first_not_of(sz.data(), nStart, n); }
size_t find_first_not_of(const wxScopedWCharBuffer& sz, size_t nStart, size_t n) const
{ return find_first_not_of(sz.data(), nStart, n); }
size_t find_last_not_of(const wxCStrData& sz, size_t nStart = 0) const
{ return find_last_not_of(sz.AsString(), nStart); }
size_t find_last_not_of(const wxScopedCharBuffer& sz, size_t nStart = 0) const
{ return find_last_not_of(sz.data(), nStart); }
size_t find_last_not_of(const wxScopedWCharBuffer& sz, size_t nStart = 0) const
{ return find_last_not_of(sz.data(), nStart); }
size_t find_last_not_of(const wxCStrData& sz, size_t nStart, size_t n) const
{ return find_last_not_of(sz.AsWChar(), nStart, n); }
size_t find_last_not_of(const wxScopedCharBuffer& sz, size_t nStart, size_t n) const
{ return find_last_not_of(sz.data(), nStart, n); }
size_t find_last_not_of(const wxScopedWCharBuffer& sz, size_t nStart, size_t n) const
{ return find_last_not_of(sz.data(), nStart, n); }
// string += string
wxString& operator+=(const wxString& s)
{
wxSTRING_INVALIDATE_CACHED_LENGTH();
m_impl += s.m_impl;
return *this;
}
// string += C string
wxString& operator+=(const char *psz)
{
wxSTRING_INVALIDATE_CACHED_LENGTH();
m_impl += ImplStr(psz);
return *this;
}
wxString& operator+=(const wchar_t *pwz)
{
wxSTRING_INVALIDATE_CACHED_LENGTH();
m_impl += ImplStr(pwz);
return *this;
}
wxString& operator+=(const wxCStrData& s)
{
wxSTRING_INVALIDATE_CACHED_LENGTH();
m_impl += s.AsString().m_impl;
return *this;
}
wxString& operator+=(const wxScopedCharBuffer& s)
{ return append(s); }
wxString& operator+=(const wxScopedWCharBuffer& s)
{ return append(s); }
// string += char
wxString& operator+=(wxUniChar ch)
{
wxSTRING_UPDATE_CACHED_LENGTH(1);
#if wxUSE_UNICODE_UTF8
if ( !ch.IsAscii() )
m_impl += wxStringOperations::EncodeChar(ch);
else
#endif
m_impl += (wxStringCharType)ch;
return *this;
}
wxString& operator+=(wxUniCharRef ch) { return *this += wxUniChar(ch); }
wxString& operator+=(int ch) { return *this += wxUniChar(ch); }
wxString& operator+=(char ch) { return *this += wxUniChar(ch); }
wxString& operator+=(unsigned char ch) { return *this += wxUniChar(ch); }
wxString& operator+=(wchar_t ch) { return *this += wxUniChar(ch); }
private:
#if !wxUSE_STL_BASED_WXSTRING
// helpers for wxStringBuffer and wxStringBufferLength
wxStringCharType *DoGetWriteBuf(size_t nLen)
{
return m_impl.DoGetWriteBuf(nLen);
}
void DoUngetWriteBuf()
{
wxSTRING_INVALIDATE_CACHE();
m_impl.DoUngetWriteBuf();
}
void DoUngetWriteBuf(size_t nLen)
{
wxSTRING_INVALIDATE_CACHE();
m_impl.DoUngetWriteBuf(nLen);
}
#endif // !wxUSE_STL_BASED_WXSTRING
#if !wxUSE_UTF8_LOCALE_ONLY
int DoPrintfWchar(const wxChar *format, ...);
static wxString DoFormatWchar(const wxChar *format, ...);
#endif
#if wxUSE_UNICODE_UTF8
int DoPrintfUtf8(const char *format, ...);
static wxString DoFormatUtf8(const char *format, ...);
#endif
#if !wxUSE_STL_BASED_WXSTRING
// check string's data validity
bool IsValid() const { return m_impl.GetStringData()->IsValid(); }
#endif
private:
wxStringImpl m_impl;
// buffers for compatibility conversion from (char*)c_str() and
// (wchar_t*)c_str(): the pointers returned by these functions should remain
// valid until the string itself is modified for compatibility with the
// existing code and consistency with std::string::c_str() so returning a
// temporary buffer won't do and we need to cache the conversion results
// TODO-UTF8: benchmark various approaches to keeping compatibility buffers
template<typename T>
struct ConvertedBuffer
{
// notice that there is no need to initialize m_len here as it's unused
// as long as m_str is NULL
ConvertedBuffer() : m_str(NULL) {}
~ConvertedBuffer()
{ free(m_str); }
bool Extend(size_t len)
{
// add extra 1 for the trailing NUL
void * const str = realloc(m_str, sizeof(T)*(len + 1));
if ( !str )
return false;
m_str = static_cast<T *>(str);
m_len = len;
return true;
}
const wxScopedCharTypeBuffer<T> AsScopedBuffer() const
{
return wxScopedCharTypeBuffer<T>::CreateNonOwned(m_str, m_len);
}
T *m_str; // pointer to the string data
size_t m_len; // length, not size, i.e. in chars and without last NUL
};
#if wxUSE_UNICODE
// common mb_str() and wxCStrData::AsChar() helper: performs the conversion
// and returns either m_convertedToChar.m_str (in which case its m_len is
// also updated) or NULL if it failed
//
// there is an important exception: in wxUSE_UNICODE_UTF8 build if conv is a
// UTF-8 one, we return m_impl.c_str() directly, without doing any conversion
// as optimization and so the caller needs to check for this before using
// m_convertedToChar
//
// NB: AsChar() returns char* in any build, unlike mb_str()
const char *AsChar(const wxMBConv& conv) const;
// mb_str() implementation helper
wxScopedCharBuffer AsCharBuf(const wxMBConv& conv) const
{
#if wxUSE_UNICODE_UTF8
// avoid conversion if we can
if ( conv.IsUTF8() )
{
return wxScopedCharBuffer::CreateNonOwned(m_impl.c_str(),
m_impl.length());
}
#endif // wxUSE_UNICODE_UTF8
// call this solely in order to fill in m_convertedToChar as AsChar()
// updates it as a side effect: this is a bit ugly but it's a completely
// internal function so the users of this class shouldn't care or know
// about it and doing it like this, i.e. having a separate AsChar(),
// allows us to avoid the creation and destruction of a temporary buffer
// when using wxCStrData without duplicating any code
if ( !AsChar(conv) )
{
// although it would be probably more correct to return NULL buffer
// from here if the conversion fails, a lot of existing code doesn't
// expect mb_str() (or wc_str()) to ever return NULL so return an
// empty string otherwise to avoid crashes in it
//
// also, some existing code does check for the conversion success and
// so asserting here would be bad too -- even if it does mean that
// silently losing data is possible for badly written code
return wxScopedCharBuffer::CreateNonOwned("", 0);
}
return m_convertedToChar.AsScopedBuffer();
}
ConvertedBuffer<char> m_convertedToChar;
#endif // !wxUSE_UNICODE
#if !wxUSE_UNICODE_WCHAR
// common wc_str() and wxCStrData::AsWChar() helper for both UTF-8 and ANSI
// builds: converts the string contents into m_convertedToWChar and returns
// NULL if the conversion failed (this can only happen in ANSI build)
//
// NB: AsWChar() returns wchar_t* in any build, unlike wc_str()
const wchar_t *AsWChar(const wxMBConv& conv) const;
// wc_str() implementation helper
wxScopedWCharBuffer AsWCharBuf(const wxMBConv& conv) const
{
if ( !AsWChar(conv) )
return wxScopedWCharBuffer::CreateNonOwned(L"", 0);
return m_convertedToWChar.AsScopedBuffer();
}
ConvertedBuffer<wchar_t> m_convertedToWChar;
#endif // !wxUSE_UNICODE_WCHAR
#if wxUSE_UNICODE_UTF8
// FIXME-UTF8: (try to) move this elsewhere (TLS) or solve differently
// assigning to character pointer to by wxString::iterator may
// change the underlying wxStringImpl iterator, so we have to
// keep track of all iterators and update them as necessary:
struct wxStringIteratorNodeHead
{
wxStringIteratorNodeHead() : ptr(NULL) {}
wxStringIteratorNode *ptr;
// copying is disallowed as it would result in more than one pointer into
// the same linked list
wxDECLARE_NO_COPY_CLASS(wxStringIteratorNodeHead);
};
wxStringIteratorNodeHead m_iterators;
friend class WXDLLIMPEXP_FWD_BASE wxStringIteratorNode;
friend class WXDLLIMPEXP_FWD_BASE wxUniCharRef;
#endif // wxUSE_UNICODE_UTF8
friend class WXDLLIMPEXP_FWD_BASE wxCStrData;
friend class wxStringInternalBuffer;
friend class wxStringInternalBufferLength;
};
// string iterator operators that satisfy STL Random Access Iterator
// requirements:
inline wxString::iterator operator+(ptrdiff_t n, wxString::iterator i)
{ return i + n; }
inline wxString::const_iterator operator+(ptrdiff_t n, wxString::const_iterator i)
{ return i + n; }
inline wxString::reverse_iterator operator+(ptrdiff_t n, wxString::reverse_iterator i)
{ return i + n; }
inline wxString::const_reverse_iterator operator+(ptrdiff_t n, wxString::const_reverse_iterator i)
{ return i + n; }
// notice that even though for many compilers the friend declarations above are
// enough, from the point of view of C++ standard we must have the declarations
// here as friend ones are not injected in the enclosing namespace and without
// them the code fails to compile with conforming compilers such as xlC or g++4
wxString WXDLLIMPEXP_BASE operator+(const wxString& string1, const wxString& string2);
wxString WXDLLIMPEXP_BASE operator+(const wxString& string, const char *psz);
wxString WXDLLIMPEXP_BASE operator+(const wxString& string, const wchar_t *pwz);
wxString WXDLLIMPEXP_BASE operator+(const char *psz, const wxString& string);
wxString WXDLLIMPEXP_BASE operator+(const wchar_t *pwz, const wxString& string);
wxString WXDLLIMPEXP_BASE operator+(const wxString& string, wxUniChar ch);
wxString WXDLLIMPEXP_BASE operator+(wxUniChar ch, const wxString& string);
inline wxString operator+(const wxString& string, wxUniCharRef ch)
{ return string + (wxUniChar)ch; }
inline wxString operator+(const wxString& string, char ch)
{ return string + wxUniChar(ch); }
inline wxString operator+(const wxString& string, wchar_t ch)
{ return string + wxUniChar(ch); }
inline wxString operator+(wxUniCharRef ch, const wxString& string)
{ return (wxUniChar)ch + string; }
inline wxString operator+(char ch, const wxString& string)
{ return wxUniChar(ch) + string; }
inline wxString operator+(wchar_t ch, const wxString& string)
{ return wxUniChar(ch) + string; }
#define wxGetEmptyString() wxString()
// ----------------------------------------------------------------------------
// helper functions which couldn't be defined inline
// ----------------------------------------------------------------------------
namespace wxPrivate
{
#if wxUSE_UNICODE_WCHAR
template <>
struct wxStringAsBufHelper<char>
{
static wxScopedCharBuffer Get(const wxString& s, size_t *len)
{
wxScopedCharBuffer buf(s.mb_str());
if ( len )
*len = buf ? strlen(buf) : 0;
return buf;
}
};
template <>
struct wxStringAsBufHelper<wchar_t>
{
static wxScopedWCharBuffer Get(const wxString& s, size_t *len)
{
const size_t length = s.length();
if ( len )
*len = length;
return wxScopedWCharBuffer::CreateNonOwned(s.wx_str(), length);
}
};
#elif wxUSE_UNICODE_UTF8
template <>
struct wxStringAsBufHelper<char>
{
static wxScopedCharBuffer Get(const wxString& s, size_t *len)
{
const size_t length = s.utf8_length();
if ( len )
*len = length;
return wxScopedCharBuffer::CreateNonOwned(s.wx_str(), length);
}
};
template <>
struct wxStringAsBufHelper<wchar_t>
{
static wxScopedWCharBuffer Get(const wxString& s, size_t *len)
{
wxScopedWCharBuffer wbuf(s.wc_str());
if ( len )
*len = wxWcslen(wbuf);
return wbuf;
}
};
#endif // Unicode build kind
} // namespace wxPrivate
// ----------------------------------------------------------------------------
// wxStringBuffer: a tiny class allowing to get a writable pointer into string
// ----------------------------------------------------------------------------
#if !wxUSE_STL_BASED_WXSTRING
// string buffer for direct access to string data in their native
// representation:
class wxStringInternalBuffer
{
public:
typedef wxStringCharType CharType;
wxStringInternalBuffer(wxString& str, size_t lenWanted = 1024)
: m_str(str), m_buf(NULL)
{ m_buf = m_str.DoGetWriteBuf(lenWanted); }
~wxStringInternalBuffer() { m_str.DoUngetWriteBuf(); }
operator wxStringCharType*() const { return m_buf; }
private:
wxString& m_str;
wxStringCharType *m_buf;
wxDECLARE_NO_COPY_CLASS(wxStringInternalBuffer);
};
class wxStringInternalBufferLength
{
public:
typedef wxStringCharType CharType;
wxStringInternalBufferLength(wxString& str, size_t lenWanted = 1024)
: m_str(str), m_buf(NULL), m_len(0), m_lenSet(false)
{
m_buf = m_str.DoGetWriteBuf(lenWanted);
wxASSERT(m_buf != NULL);
}
~wxStringInternalBufferLength()
{
wxASSERT(m_lenSet);
m_str.DoUngetWriteBuf(m_len);
}
operator wxStringCharType*() const { return m_buf; }
void SetLength(size_t length) { m_len = length; m_lenSet = true; }
private:
wxString& m_str;
wxStringCharType *m_buf;
size_t m_len;
bool m_lenSet;
wxDECLARE_NO_COPY_CLASS(wxStringInternalBufferLength);
};
#endif // !wxUSE_STL_BASED_WXSTRING
template<typename T>
class wxStringTypeBufferBase
{
public:
typedef T CharType;
wxStringTypeBufferBase(wxString& str, size_t lenWanted = 1024)
: m_str(str), m_buf(lenWanted)
{
// for compatibility with old wxStringBuffer which provided direct
// access to wxString internal buffer, initialize ourselves with the
// string initial contents
size_t len;
const wxCharTypeBuffer<CharType> buf(str.tchar_str<CharType>(&len));
if ( buf )
{
if ( len > lenWanted )
{
// in this case there is not enough space for terminating NUL,
// ensure that we still put it there
m_buf.data()[lenWanted] = 0;
len = lenWanted - 1;
}
memcpy(m_buf.data(), buf, (len + 1)*sizeof(CharType));
}
//else: conversion failed, this can happen when trying to get Unicode
// string contents into a char string
}
operator CharType*() { return m_buf.data(); }
protected:
wxString& m_str;
wxCharTypeBuffer<CharType> m_buf;
};
template<typename T>
class wxStringTypeBufferLengthBase : public wxStringTypeBufferBase<T>
{
public:
wxStringTypeBufferLengthBase(wxString& str, size_t lenWanted = 1024)
: wxStringTypeBufferBase<T>(str, lenWanted),
m_len(0),
m_lenSet(false)
{ }
~wxStringTypeBufferLengthBase()
{
wxASSERT_MSG( this->m_lenSet, "forgot to call SetLength()" );
}
void SetLength(size_t length) { m_len = length; m_lenSet = true; }
protected:
size_t m_len;
bool m_lenSet;
};
template<typename T>
class wxStringTypeBuffer : public wxStringTypeBufferBase<T>
{
public:
wxStringTypeBuffer(wxString& str, size_t lenWanted = 1024)
: wxStringTypeBufferBase<T>(str, lenWanted)
{ }
~wxStringTypeBuffer()
{
this->m_str.assign(this->m_buf.data());
}
wxDECLARE_NO_COPY_CLASS(wxStringTypeBuffer);
};
template<typename T>
class wxStringTypeBufferLength : public wxStringTypeBufferLengthBase<T>
{
public:
wxStringTypeBufferLength(wxString& str, size_t lenWanted = 1024)
: wxStringTypeBufferLengthBase<T>(str, lenWanted)
{ }
~wxStringTypeBufferLength()
{
this->m_str.assign(this->m_buf.data(), this->m_len);
}
wxDECLARE_NO_COPY_CLASS(wxStringTypeBufferLength);
};
#if wxUSE_STL_BASED_WXSTRING
class wxStringInternalBuffer : public wxStringTypeBufferBase<wxStringCharType>
{
public:
wxStringInternalBuffer(wxString& str, size_t lenWanted = 1024)
: wxStringTypeBufferBase<wxStringCharType>(str, lenWanted) {}
~wxStringInternalBuffer()
{ m_str.m_impl.assign(m_buf.data()); }
wxDECLARE_NO_COPY_CLASS(wxStringInternalBuffer);
};
class wxStringInternalBufferLength
: public wxStringTypeBufferLengthBase<wxStringCharType>
{
public:
wxStringInternalBufferLength(wxString& str, size_t lenWanted = 1024)
: wxStringTypeBufferLengthBase<wxStringCharType>(str, lenWanted) {}
~wxStringInternalBufferLength()
{
m_str.m_impl.assign(m_buf.data(), m_len);
}
wxDECLARE_NO_COPY_CLASS(wxStringInternalBufferLength);
};
#endif // wxUSE_STL_BASED_WXSTRING
#if wxUSE_STL_BASED_WXSTRING || wxUSE_UNICODE_UTF8
typedef wxStringTypeBuffer<wxChar> wxStringBuffer;
typedef wxStringTypeBufferLength<wxChar> wxStringBufferLength;
#else // if !wxUSE_STL_BASED_WXSTRING && !wxUSE_UNICODE_UTF8
typedef wxStringInternalBuffer wxStringBuffer;
typedef wxStringInternalBufferLength wxStringBufferLength;
#endif // !wxUSE_STL_BASED_WXSTRING && !wxUSE_UNICODE_UTF8
#if wxUSE_UNICODE_UTF8
typedef wxStringInternalBuffer wxUTF8StringBuffer;
typedef wxStringInternalBufferLength wxUTF8StringBufferLength;
#elif wxUSE_UNICODE_WCHAR
// Note about inlined dtors in the classes below: this is done not for
// performance reasons but just to avoid linking errors in the MSVC DLL build
// under Windows: if a class has non-inline methods it must be declared as
// being DLL-exported but, due to an extremely interesting feature of MSVC 7
// and later, any template class which is used as a base of a DLL-exported
// class is implicitly made DLL-exported too, as explained at the bottom of
// http://msdn.microsoft.com/en-us/library/twa2aw10.aspx (just to confirm: yes,
// _inheriting_ from a class can change whether it is being exported from DLL)
//
// But this results in link errors because the base template class is not DLL-
// exported, whether it is declared with WXDLLIMPEXP_BASE or not, because it
// does have only inline functions. So the simplest fix is to just make all the
// functions of these classes inline too.
class wxUTF8StringBuffer : public wxStringTypeBufferBase<char>
{
public:
wxUTF8StringBuffer(wxString& str, size_t lenWanted = 1024)
: wxStringTypeBufferBase<char>(str, lenWanted) {}
~wxUTF8StringBuffer()
{
wxMBConvStrictUTF8 conv;
size_t wlen = conv.ToWChar(NULL, 0, m_buf);
wxCHECK_RET( wlen != wxCONV_FAILED, "invalid UTF-8 data in string buffer?" );
wxStringInternalBuffer wbuf(m_str, wlen);
conv.ToWChar(wbuf, wlen, m_buf);
}
wxDECLARE_NO_COPY_CLASS(wxUTF8StringBuffer);
};
class wxUTF8StringBufferLength : public wxStringTypeBufferLengthBase<char>
{
public:
wxUTF8StringBufferLength(wxString& str, size_t lenWanted = 1024)
: wxStringTypeBufferLengthBase<char>(str, lenWanted) {}
~wxUTF8StringBufferLength()
{
wxCHECK_RET(m_lenSet, "length not set");
wxMBConvStrictUTF8 conv;
size_t wlen = conv.ToWChar(NULL, 0, m_buf, m_len);
wxCHECK_RET( wlen != wxCONV_FAILED, "invalid UTF-8 data in string buffer?" );
wxStringInternalBufferLength wbuf(m_str, wlen);
conv.ToWChar(wbuf, wlen, m_buf, m_len);
wbuf.SetLength(wlen);
}
wxDECLARE_NO_COPY_CLASS(wxUTF8StringBufferLength);
};
#endif // wxUSE_UNICODE_UTF8/wxUSE_UNICODE_WCHAR
// ---------------------------------------------------------------------------
// wxString comparison functions: operator versions are always case sensitive
// ---------------------------------------------------------------------------
#define wxCMP_WXCHAR_STRING(p, s, op) 0 op s.Cmp(p)
wxDEFINE_ALL_COMPARISONS(const wxChar *, const wxString&, wxCMP_WXCHAR_STRING)
#undef wxCMP_WXCHAR_STRING
inline bool operator==(const wxString& s1, const wxString& s2)
{ return s1.IsSameAs(s2); }
inline bool operator!=(const wxString& s1, const wxString& s2)
{ return !s1.IsSameAs(s2); }
inline bool operator< (const wxString& s1, const wxString& s2)
{ return s1.Cmp(s2) < 0; }
inline bool operator> (const wxString& s1, const wxString& s2)
{ return s1.Cmp(s2) > 0; }
inline bool operator<=(const wxString& s1, const wxString& s2)
{ return s1.Cmp(s2) <= 0; }
inline bool operator>=(const wxString& s1, const wxString& s2)
{ return s1.Cmp(s2) >= 0; }
inline bool operator==(const wxString& s1, const wxCStrData& s2)
{ return s1 == s2.AsString(); }
inline bool operator==(const wxCStrData& s1, const wxString& s2)
{ return s1.AsString() == s2; }
inline bool operator!=(const wxString& s1, const wxCStrData& s2)
{ return s1 != s2.AsString(); }
inline bool operator!=(const wxCStrData& s1, const wxString& s2)
{ return s1.AsString() != s2; }
inline bool operator==(const wxString& s1, const wxScopedWCharBuffer& s2)
{ return (s1.Cmp((const wchar_t *)s2) == 0); }
inline bool operator==(const wxScopedWCharBuffer& s1, const wxString& s2)
{ return (s2.Cmp((const wchar_t *)s1) == 0); }
inline bool operator!=(const wxString& s1, const wxScopedWCharBuffer& s2)
{ return (s1.Cmp((const wchar_t *)s2) != 0); }
inline bool operator!=(const wxScopedWCharBuffer& s1, const wxString& s2)
{ return (s2.Cmp((const wchar_t *)s1) != 0); }
inline bool operator==(const wxString& s1, const wxScopedCharBuffer& s2)
{ return (s1.Cmp((const char *)s2) == 0); }
inline bool operator==(const wxScopedCharBuffer& s1, const wxString& s2)
{ return (s2.Cmp((const char *)s1) == 0); }
inline bool operator!=(const wxString& s1, const wxScopedCharBuffer& s2)
{ return (s1.Cmp((const char *)s2) != 0); }
inline bool operator!=(const wxScopedCharBuffer& s1, const wxString& s2)
{ return (s2.Cmp((const char *)s1) != 0); }
inline wxString operator+(const wxString& string, const wxScopedWCharBuffer& buf)
{ return string + (const wchar_t *)buf; }
inline wxString operator+(const wxScopedWCharBuffer& buf, const wxString& string)
{ return (const wchar_t *)buf + string; }
inline wxString operator+(const wxString& string, const wxScopedCharBuffer& buf)
{ return string + (const char *)buf; }
inline wxString operator+(const wxScopedCharBuffer& buf, const wxString& string)
{ return (const char *)buf + string; }
// comparison with char
inline bool operator==(const wxUniChar& c, const wxString& s) { return s.IsSameAs(c); }
inline bool operator==(const wxUniCharRef& c, const wxString& s) { return s.IsSameAs(c); }
inline bool operator==(char c, const wxString& s) { return s.IsSameAs(c); }
inline bool operator==(wchar_t c, const wxString& s) { return s.IsSameAs(c); }
inline bool operator==(int c, const wxString& s) { return s.IsSameAs(c); }
inline bool operator==(const wxString& s, const wxUniChar& c) { return s.IsSameAs(c); }
inline bool operator==(const wxString& s, const wxUniCharRef& c) { return s.IsSameAs(c); }
inline bool operator==(const wxString& s, char c) { return s.IsSameAs(c); }
inline bool operator==(const wxString& s, wchar_t c) { return s.IsSameAs(c); }
inline bool operator!=(const wxUniChar& c, const wxString& s) { return !s.IsSameAs(c); }
inline bool operator!=(const wxUniCharRef& c, const wxString& s) { return !s.IsSameAs(c); }
inline bool operator!=(char c, const wxString& s) { return !s.IsSameAs(c); }
inline bool operator!=(wchar_t c, const wxString& s) { return !s.IsSameAs(c); }
inline bool operator!=(int c, const wxString& s) { return !s.IsSameAs(c); }
inline bool operator!=(const wxString& s, const wxUniChar& c) { return !s.IsSameAs(c); }
inline bool operator!=(const wxString& s, const wxUniCharRef& c) { return !s.IsSameAs(c); }
inline bool operator!=(const wxString& s, char c) { return !s.IsSameAs(c); }
inline bool operator!=(const wxString& s, wchar_t c) { return !s.IsSameAs(c); }
// wxString iterators comparisons
inline bool wxString::iterator::operator==(const const_iterator& i) const
{ return i == *this; }
inline bool wxString::iterator::operator!=(const const_iterator& i) const
{ return i != *this; }
inline bool wxString::iterator::operator<(const const_iterator& i) const
{ return i > *this; }
inline bool wxString::iterator::operator>(const const_iterator& i) const
{ return i < *this; }
inline bool wxString::iterator::operator<=(const const_iterator& i) const
{ return i >= *this; }
inline bool wxString::iterator::operator>=(const const_iterator& i) const
{ return i <= *this; }
// comparison with C string in Unicode build
#if wxUSE_UNICODE
#define wxCMP_CHAR_STRING(p, s, op) wxString(p) op s
wxDEFINE_ALL_COMPARISONS(const char *, const wxString&, wxCMP_CHAR_STRING)
#undef wxCMP_CHAR_STRING
#endif // wxUSE_UNICODE
// we also need to provide the operators for comparison with wxCStrData to
// resolve ambiguity between operator(const wxChar *,const wxString &) and
// operator(const wxChar *, const wxChar *) for "p == s.c_str()"
//
// notice that these are (shallow) pointer comparisons, not (deep) string ones
#define wxCMP_CHAR_CSTRDATA(p, s, op) p op s.AsChar()
#define wxCMP_WCHAR_CSTRDATA(p, s, op) p op s.AsWChar()
wxDEFINE_ALL_COMPARISONS(const wchar_t *, const wxCStrData&, wxCMP_WCHAR_CSTRDATA)
wxDEFINE_ALL_COMPARISONS(const char *, const wxCStrData&, wxCMP_CHAR_CSTRDATA)
#undef wxCMP_CHAR_CSTRDATA
#undef wxCMP_WCHAR_CSTRDATA
// ----------------------------------------------------------------------------
// Implement hashing using C++11 std::hash<>.
// ----------------------------------------------------------------------------
// Check for both compiler and standard library support for C++11: normally the
// former implies the latter but under Mac OS X < 10.7 C++11 compiler can (and
// even has to be) used with non-C++11 standard library, so explicitly exclude
// this case.
#if (__cplusplus >= 201103L || wxCHECK_VISUALC_VERSION(10)) \
&& ( (!defined __GLIBCXX__) || (__GLIBCXX__ > 20070719) )
// Don't do this if ToStdWstring() is not available. We could work around it
// but, presumably, if using std::wstring is undesirable, then so is using
// std::hash<> anyhow.
#if wxUSE_STD_STRING
#include <functional>
namespace std
{
template<>
struct hash<wxString>
{
size_t operator()(const wxString& s) const
{
return std::hash<std::wstring>()(s.ToStdWstring());
}
};
} // namespace std
#endif // wxUSE_STD_STRING
#endif // C++11
// ---------------------------------------------------------------------------
// Implementation only from here until the end of file
// ---------------------------------------------------------------------------
#if wxUSE_STD_IOSTREAM
#include "wx/iosfwrap.h"
WXDLLIMPEXP_BASE wxSTD ostream& operator<<(wxSTD ostream&, const wxString&);
WXDLLIMPEXP_BASE wxSTD ostream& operator<<(wxSTD ostream&, const wxCStrData&);
WXDLLIMPEXP_BASE wxSTD ostream& operator<<(wxSTD ostream&, const wxScopedCharBuffer&);
#ifndef __BORLANDC__
WXDLLIMPEXP_BASE wxSTD ostream& operator<<(wxSTD ostream&, const wxScopedWCharBuffer&);
#endif
#if wxUSE_UNICODE && defined(HAVE_WOSTREAM)
WXDLLIMPEXP_BASE wxSTD wostream& operator<<(wxSTD wostream&, const wxString&);
WXDLLIMPEXP_BASE wxSTD wostream& operator<<(wxSTD wostream&, const wxCStrData&);
WXDLLIMPEXP_BASE wxSTD wostream& operator<<(wxSTD wostream&, const wxScopedWCharBuffer&);
#endif // wxUSE_UNICODE && defined(HAVE_WOSTREAM)
#endif // wxUSE_STD_IOSTREAM
// ---------------------------------------------------------------------------
// wxCStrData implementation
// ---------------------------------------------------------------------------
inline wxCStrData::wxCStrData(char *buf)
: m_str(new wxString(buf)), m_offset(0), m_owned(true) {}
inline wxCStrData::wxCStrData(wchar_t *buf)
: m_str(new wxString(buf)), m_offset(0), m_owned(true) {}
inline wxCStrData::wxCStrData(const wxCStrData& data)
: m_str(data.m_owned ? new wxString(*data.m_str) : data.m_str),
m_offset(data.m_offset),
m_owned(data.m_owned)
{
}
inline wxCStrData::~wxCStrData()
{
if ( m_owned )
delete const_cast<wxString*>(m_str); // cast to silence warnings
}
// AsChar() and AsWChar() implementations simply forward to wxString methods
inline const wchar_t* wxCStrData::AsWChar() const
{
const wchar_t * const p =
#if wxUSE_UNICODE_WCHAR
m_str->wc_str();
#elif wxUSE_UNICODE_UTF8
m_str->AsWChar(wxMBConvStrictUTF8());
#else
m_str->AsWChar(wxConvLibc);
#endif
// in Unicode build the string always has a valid Unicode representation
// and even if a conversion is needed (as in UTF8 case) it can't fail
//
// but in ANSI build the string contents might be not convertible to
// Unicode using the current locale encoding so we do need to check for
// errors
#if !wxUSE_UNICODE
if ( !p )
{
// if conversion fails, 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
// from its c_str() and so we shouldn't neither
//
// notice that the same is done in AsChar() below and
// wxString::wc_str() and mb_str() for the same reasons
return L"";
}
#endif // !wxUSE_UNICODE
return p + m_offset;
}
inline const char* wxCStrData::AsChar() const
{
#if wxUSE_UNICODE && !wxUSE_UTF8_LOCALE_ONLY
const char * const p = m_str->AsChar(wxConvLibc);
if ( !p )
return "";
#else // !wxUSE_UNICODE || wxUSE_UTF8_LOCALE_ONLY
const char * const p = m_str->mb_str();
#endif // wxUSE_UNICODE && !wxUSE_UTF8_LOCALE_ONLY
return p + m_offset;
}
inline wxString wxCStrData::AsString() const
{
if ( m_offset == 0 )
return *m_str;
else
return m_str->Mid(m_offset);
}
inline const wxStringCharType *wxCStrData::AsInternal() const
{
#if wxUSE_UNICODE_UTF8
return wxStringOperations::AddToIter(m_str->wx_str(), m_offset);
#else
return m_str->wx_str() + m_offset;
#endif
}
inline wxUniChar wxCStrData::operator*() const
{
if ( m_str->empty() )
return wxUniChar(wxT('\0'));
else
return (*m_str)[m_offset];
}
inline wxUniChar wxCStrData::operator[](size_t n) const
{
// NB: we intentionally use operator[] and not at() here because the former
// works for the terminating NUL while the latter does not
return (*m_str)[m_offset + n];
}
// ----------------------------------------------------------------------------
// more wxCStrData operators
// ----------------------------------------------------------------------------
// we need to define those to allow "size_t pos = p - s.c_str()" where p is
// some pointer into the string
inline size_t operator-(const char *p, const wxCStrData& cs)
{
return p - cs.AsChar();
}
inline size_t operator-(const wchar_t *p, const wxCStrData& cs)
{
return p - cs.AsWChar();
}
// ----------------------------------------------------------------------------
// implementation of wx[W]CharBuffer inline methods using wxCStrData
// ----------------------------------------------------------------------------
// FIXME-UTF8: move this to buffer.h
inline wxCharBuffer::wxCharBuffer(const wxCStrData& cstr)
: wxCharTypeBufferBase(cstr.AsCharBuf())
{
}
inline wxWCharBuffer::wxWCharBuffer(const wxCStrData& cstr)
: wxCharTypeBufferBase(cstr.AsWCharBuf())
{
}
#if wxUSE_UNICODE_UTF8
// ----------------------------------------------------------------------------
// implementation of wxStringIteratorNode inline methods
// ----------------------------------------------------------------------------
void wxStringIteratorNode::DoSet(const wxString *str,
wxStringImpl::const_iterator *citer,
wxStringImpl::iterator *iter)
{
m_prev = NULL;
m_iter = iter;
m_citer = citer;
m_str = str;
if ( str )
{
m_next = str->m_iterators.ptr;
const_cast<wxString*>(m_str)->m_iterators.ptr = this;
if ( m_next )
m_next->m_prev = this;
}
else
{
m_next = NULL;
}
}
void wxStringIteratorNode::clear()
{
if ( m_next )
m_next->m_prev = m_prev;
if ( m_prev )
m_prev->m_next = m_next;
else if ( m_str ) // first in the list
const_cast<wxString*>(m_str)->m_iterators.ptr = m_next;
m_next = m_prev = NULL;
m_citer = NULL;
m_iter = NULL;
m_str = NULL;
}
#endif // wxUSE_UNICODE_UTF8
#if WXWIN_COMPATIBILITY_2_8
// lot of code out there doesn't explicitly include wx/crt.h, but uses
// CRT wrappers that are now declared in wx/wxcrt.h and wx/wxcrtvararg.h,
// so let's include this header now that wxString is defined and it's safe
// to do it:
#include "wx/crt.h"
#endif
// ----------------------------------------------------------------------------
// Checks on wxString characters
// ----------------------------------------------------------------------------
template<bool (T)(const wxUniChar& c)>
inline bool wxStringCheck(const wxString& val)
{
for ( wxString::const_iterator i = val.begin();
i != val.end();
++i )
if (T(*i) == 0)
return false;
return true;
}
#endif // _WX_WXSTRING_H_
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