#ifdef _WIN32
//#define UNICODE // per le funzioni di conversione da/a UNC
#include <windows.h>
#include <lm.h>
const char slash = '\\';
const char auxslash = '/';
const char wslash = L'\\';
const char wauxslash = L'/';
#else
const char slash = '/';
const char auxslash = '\\';
const char wslash = '/';
const char wauxslash = '\\';
#endif
//=============================================================================
#include "tfilepath.h"
#include "tconvert.h"
//#include "tsystem.h"
#include <math.h>
//#include <tcommon.h> contenuto in tconvert.h
#include <ctype.h>
bool TFilePath::m_underscoreFormatAllowed = true;
namespace
{
/*-- fromSeg位置 と toSeg位置は含まず、それらの間に挟まれている文字列が「数字4ケタ」ならtrueを返す --*/
bool isNumbers(std::wstring str, int fromSeg, int toSeg)
{
if (toSeg - fromSeg != 5)
return false;
for (int pos = fromSeg + 1; pos < toSeg; pos++) {
if (str[pos] < '0' || str[pos] > '9')
return false;
}
return true;
}
};
//TFrameId::operator string() const
string TFrameId::expand(FrameFormat format) const
{
if (m_frame == EMPTY_FRAME)
return "";
else if (m_frame == NO_FRAME)
return "-";
char buffer[80];
ostrstream o_buff(buffer, sizeof(buffer));
if (format == FOUR_ZEROS || format == UNDERSCORE_FOUR_ZEROS) {
o_buff.fill('0');
o_buff.width(4);
o_buff << m_frame;
o_buff.width(0);
} else {
o_buff << m_frame;
}
if (m_letter != '\0')
o_buff << m_letter;
int len = o_buff.pcount();
return string(buffer, len);
}
//-------------------------------------------------------------------
const TFrameId &TFrameId::operator++()
{
++m_frame;
m_letter = 0;
return *this;
}
//-------------------------------------------------------------------
const TFrameId &TFrameId::operator--()
{
if (m_letter > 0)
m_letter = 0;
else
--m_frame;
return *this;
}
//=============================================================================
inline bool isSlash(char c)
{
return c == slash || c == auxslash;
}
//-----------------------------------------------------------------------------
inline bool isSlash(wchar_t c)
{
return c == wslash || c == wauxslash;
}
//-----------------------------------------------------------------------------
// cerca l'ultimo '/' o '\'. Se non c'e' ritorna -1
// di modo che la sottostringa che parte da getLastSlash() + 1 e' nome.frame.tipo
inline int getLastSlash(const wstring &path)
{
int i;
for (i = path.length() - 1; i >= 0 && !isSlash(path[i]); i--) {
}
return i;
}
//-----------------------------------------------------------------------------
/*
void TFilePath::setPath(string path)
{
bool isUncName = false;
// elimino i '//', './' e '/' finali; raddrizzo gli slash 'storti'.
// se il path comincia con "<alpha>:" aggiungo uno slash
int length =path.length();
int pos = 0;
if(path.length()>=2 && isalpha(path[0]) && path[1] == ':')
{
m_path.append(path,0,2);
pos=2;
if(path.length()==2 || !isSlash(path[pos])) m_path.append(1,slash);
}
#ifdef _WIN32
else //se si tratta di un path in formato UNC e' del tipo "\\\\MachineName"
//RICONTROLLARE! SE SI HA IP ADDRESS FALLIVA!
if (path.length() >= 3 && path[0] == '\\' && path[1] == '\\' && (isalpha(path[2]) || isdigit(path[2])) )
{
isUncName = true;
m_path.append(path,0,3);
pos = 3;
}
#endif
for(;pos<length;pos++)
if(path[pos] == '.')
{
pos++;
if(pos>=length)
{
if(pos>1) m_path.append(1,'.');
}
else if(!isSlash(path[pos])) m_path.append(path,pos-1,2);
else {
while(pos+1<length && isSlash(path[pos+1]))
pos++;
}
}
else if(isSlash(path[pos]))
{
do pos++;
while(pos<length && isSlash(path[pos]));
pos--;
m_path.append(1,slash);
}
else
{
m_path.append(1,path[pos]);
}
// rimuovo l'eventuale '/' finale (a meno che m_path == "/" o m_path == "<letter>:\"
// oppure sia UNC (Windows only) )
if(!(m_path.length()==1 && m_path[0] == slash ||
m_path.length()==3 && isalpha(m_path[0]) && m_path[1] == ':' && m_path[2] == slash)
&& m_path.length()>1 && m_path[m_path.length()-1] == slash)
m_path.erase(m_path.length()-1, 1);
if (isUncName && m_path.find_last_of('\\') == 1) // e' indicato solo il nome della macchina...
m_path.append(1, slash);
}
*/
//-----------------------------------------------------------------------------
/*
void append(string &out, wchar_t c)
{
if(32 <= c && c<=127 && c!='&') out.append(1, (char)c);
else if(c=='&') out.append("&");
else
{
ostrstream ss;
ss << "&#" << c << ";" << '\0';
out += ss.str();
ss.freeze(0);
}
}
*/
//-----------------------------------------------------------------------------
void TFilePath::setPath(std::wstring path)
{
bool isUncName = false;
// elimino i '//', './' e '/' finali; raddrizzo gli slash 'storti'.
// se il path comincia con "<alpha>:" aggiungo uno slash
int length = path.length();
int pos = 0;
if (path.length() >= 2 && iswalpha(path[0]) && path[1] == L':') {
m_path.append(1, (wchar_t)path[0]);
m_path.append(1, L':');
// m_path.append(path,0,2);
pos = 2;
if (path.length() == 2 || !isSlash(path[pos]))
m_path.append(1, wslash);
}
//se si tratta di un path in formato UNC e' del tipo "\\\\MachineName"
else if (path.length() >= 3 && path[0] == L'\\' && path[1] == L'\\' && iswalnum(path[2]) ||
path.length() >= 3 && path[0] == L'/' && path[1] == L'/' && iswalnum(path[2])) {
isUncName = true;
m_path.append(2, L'\\');
m_path.append(1, path[2]);
pos = 3;
}
for (; pos < length; pos++)
if (path[pos] == L'.') {
pos++;
if (pos >= length) {
if (pos > 1)
m_path.append(1, L'.');
} else if (!isSlash(path[pos])) {
m_path.append(1, L'.');
m_path.append(1, path[pos]);
} else {
while (pos + 1 < length && isSlash(path[pos + 1]))
pos++;
}
} else if (isSlash(path[pos])) {
int firstSlashPos = pos;
do
pos++;
while (pos < length && isSlash(path[pos]));
if (firstSlashPos == 0 && pos == 4) //Caso "\\\\MachineName"
m_path.append(2, wslash);
else
m_path.append(1, wslash);
pos--;
} else {
m_path.append(1, path[pos]);
}
// rimuovo l'eventuale '/' finale (a meno che m_path == "/" o m_path == "<letter>:\"
// oppure sia UNC (Windows only) )
if (!(m_path.length() == 1 && m_path[0] == wslash ||
m_path.length() == 3 && iswalpha(m_path[0]) && m_path[1] == L':' && m_path[2] == wslash) &&
m_path.length() > 1 && m_path[m_path.length() - 1] == wslash)
m_path.erase(m_path.length() - 1, 1);
if (isUncName && !(m_path.find_last_of(L'\\') > 1 || m_path.find_last_of(L'/') > 1)) // e' indicato solo il nome della macchina...
m_path.append(1, wslash);
}
//-----------------------------------------------------------------------------
TFilePath::TFilePath(const char *path)
{
setPath(toWideString(path));
}
//-----------------------------------------------------------------------------
TFilePath::TFilePath(const string &path)
{
setPath(toWideString(path));
}
//-----------------------------------------------------------------------------
TFilePath::TFilePath(const std::wstring &path)
{
setPath(path);
}
//-----------------------------------------------------------------------------
TFilePath::TFilePath(const QString &path)
{
setPath(path.toStdWString());
}
//-----------------------------------------------------------------------------
bool TFilePath::operator==(const TFilePath &fp) const
{
#ifdef _WIN32
return _wcsicmp(m_path.c_str(), fp.m_path.c_str()) == 0;
#else
return m_path == fp.m_path;
#endif
}
//-----------------------------------------------------------------------------
bool TFilePath::operator<(const TFilePath &fp) const
{
wstring iName = m_path;
wstring jName = fp.m_path;
int i1 = 0, j1 = 0;
int i2 = m_path.find(L"\\");
int j2 = fp.m_path.find(L"\\");
if (i2 == j2 && j2 == -1)
#ifdef _WIN32
return _wcsicmp(m_path.c_str(), fp.m_path.c_str()) < 0;
#else
return m_path < fp.m_path;
#endif
if (!i2) {
++i1;
i2 = m_path.find(L"\\", i1);
}
if (!j2) {
++j1;
j2 = fp.m_path.find(L"\\", j1);
}
while (i2 != -1 || j2 != -1) {
iName = (i2 != -1) ? m_path.substr(i1, i2 - i1) : m_path;
jName = (j2 != -1) ? fp.m_path.substr(j1, j2 - j1) : fp.m_path;
//se le due parti di path, conpresi tra slash sono uguali
//itero il processo di confronto altrimenti ritorno
#ifdef _WIN32
char differ;
differ = _wcsicmp(iName.c_str(), jName.c_str());
if (differ != 0)
return differ < 0 ? true : false;
#else
if (TFilePath(iName) != TFilePath(jName))
return TFilePath(iName) < TFilePath(jName);
#endif
i1 = (i2 != -1) ? i2 + 1 : m_path.size();
j1 = (j2 != -1) ? j2 + 1 : fp.m_path.size();
i2 = m_path.find(L"\\", i1);
j2 = fp.m_path.find(L"\\", j1);
}
iName = m_path.substr(i1, m_path.size() - i1);
jName = fp.m_path.substr(j1, fp.m_path.size() - j1);
#ifdef _WIN32
return _wcsicmp(iName.c_str(), jName.c_str()) < 0;
#else
return TFilePath(iName) < TFilePath(jName);
#endif
}
#ifdef LEVO
bool TFilePath::operator<(const TFilePath &fp) const
{
/*
wstring a = m_path, b = fp.m_path;
for(;;)
{
wstring ka,kb;
int i;
i = a.find_first_of("/\\");
if(i==wstring::npos) {ka = a; a = L"";}
i = b.find_first_of("/\\");
if(i==wstring::npos) {ka = a; a = L"";}
}
*/
wstring a = toLower(m_path), b = toLower(fp.m_path);
return a < b;
}
#endif
//-----------------------------------------------------------------------------
TFilePath &TFilePath::operator+=(const TFilePath &fp)
{
assert(!fp.isAbsolute());
if (fp.isEmpty())
return *this;
else if (isEmpty()) {
*this = fp;
return *this;
} else if (m_path.length() != 1 || m_path[0] != slash) {
assert(!m_path.empty());
if (!isSlash(m_path[m_path.length() - 1]))
m_path.append(1, wslash);
m_path += fp.m_path;
return *this;
} else {
*this = TFilePath(m_path + fp.m_path);
return *this;
}
}
//-----------------------------------------------------------------------------
TFilePath TFilePath::operator+(const TFilePath &fp) const
{
TFilePath ret(*this);
ret += fp;
return ret;
}
//-----------------------------------------------------------------------------
TFilePath &TFilePath::operator+=(const std::wstring &s)
{
if (s.empty())
return *this;
// if(m_path.length()!=1 || m_path[0] != slash)
// m_path += slash;
if (m_path.length() > 0 && !isSlash(m_path[m_path.length() - 1]))
m_path.append(1, wslash);
m_path += s;
return *this;
}
//-----------------------------------------------------------------------------
const wstring TFilePath::getWideString() const
{
return m_path;
/*
std::wstring s;
int n = m_path.size();
for(int i=0;i<n; i++)
{
char c = m_path[i];
if(c!='&') s.append(1, (unsigned short)c);
else
{
i++;
if(m_path[i] == '#')
{
unsigned short w = 0;
i++;
while(i<n)
{
c = m_path[i];
if('0'<=c && c<='9')
w = w*10 + c - '0';
else if('a' <=c && c<='f')
w = w*10 + c - 'a' + 10;
else if('A' <=c && c<='F')
w = w*10 + c - 'A' + 10;
else
break;
i++;
}
s.append(1, w);
}
}
}
return s;
*/
}
/*
#else
const wstring TFilePath::getWideString() const
{
wstring a(L"dummy string");
return a;
}
#endif
*/
//-----------------------------------------------------------------------------
QString TFilePath::getQString() const
{
return QString::fromStdWString(getWideString());
}
//-----------------------------------------------------------------------------
ostream &operator<<(ostream &out, const TFilePath &path)
{
wstring w = path.getWideString();
return out << toString(w) << " ";
// string w = path.getString();
// return out << w << " ";
}
//-----------------------------------------------------------------------------
/*
TFilePath TFilePath::operator+ (const TFilePath &fp) const
{
assert(!fp.isAbsolute());
if(fp.isEmpty()) return *this;
else if(isEmpty()) return fp;
else if(m_path.length()!=1 || m_path[0] != slash)
return TFilePath(m_path + slash + fp.m_path);
else
return TFilePath(m_path + fp.m_path);
}
*/
//-----------------------------------------------------------------------------
bool TFilePath::isAbsolute() const
{
return m_path.length() >= 1 && m_path[0] == slash ||
m_path.length() >= 2 && iswalpha(m_path[0]) && m_path[1] == ':';
}
//-----------------------------------------------------------------------------
bool TFilePath::isRoot() const
{
return m_path.length() == 1 && m_path[0] == slash ||
m_path.length() == 3 && iswalpha(m_path[0]) && m_path[1] == ':' && m_path[2] == slash ||
m_path.length() > 2 && m_path[0] == slash && m_path[1] == slash && (string::npos == m_path.find(slash, 2) || m_path.find(slash, 2) == m_path.size() - 1);
}
//-----------------------------------------------------------------------------
// ritorna ""(niente tipo, niente punto), "." (file con tipo) o ".." (file con tipo e frame)
string TFilePath::getDots() const
{
int i = getLastSlash(m_path);
wstring str = m_path.substr(i + 1);
// potrei anche avere a.b.c.d dove d e' l'estensione
i = str.rfind(L".");
if (i == (int)wstring::npos || str == L"..")
return "";
if (str.substr(0, i).rfind(L".") != wstring::npos)
return "..";
else if (m_underscoreFormatAllowed) {
int j = str.substr(0, i).rfind(L"_");
/*-- j == i-1は、フレーム番号を抜いて"A_.tga"のような場合の条件 --*/
return (j != (int)wstring::npos &&
(j == i - 1 || isNumbers(str, j, i)))
? ".."
: ".";
} else
return ".";
}
//-----------------------------------------------------------------------------
string TFilePath::getDottedType() const // ritorna l'estensione con PUNTO (se c'e')
{
int i = getLastSlash(m_path);
wstring str = m_path.substr(i + 1);
i = str.rfind(L".");
if (i == (int)wstring::npos)
return "";
return toLower(toString(str.substr(i)));
}
//-----------------------------------------------------------------------------
string TFilePath::getUndottedType() const // ritorna l'estensione senza PUNTO
{
size_t i = getLastSlash(m_path);
wstring str = m_path.substr(i + 1);
i = str.rfind(L".");
if (i == wstring::npos || i == str.length() - 1)
return "";
return toLower(toString(str.substr(i + 1)));
}
//-----------------------------------------------------------------------------
wstring TFilePath::getWideName() const // noDot! noSlash!
{
int i = getLastSlash(m_path); //cerco l'ultimo slash
wstring str = m_path.substr(i + 1);
i = str.rfind(L".");
if (i == (int)wstring::npos)
return str;
int j = str.substr(0, i).rfind(L".");
if (j != (int)wstring::npos)
i = j;
else if (m_underscoreFormatAllowed) {
j = str.substr(0, i).rfind(L"_");
if (j != (int)wstring::npos && isNumbers(str, j, i))
i = j;
}
return str.substr(0, i);
}
//-----------------------------------------------------------------------------
string TFilePath::getName() const // noDot! noSlash!
{
return toString(getWideName());
}
//-----------------------------------------------------------------------------
// es. TFilePath("/pippo/pluto.0001.gif").getLevelName() == "pluto..gif"
string TFilePath::getLevelName() const
{
return toString(getLevelNameW());
}
//-----------------------------------------------------------------------------
// es. TFilePath("/pippo/pluto.0001.gif").getLevelName() == "pluto..gif"
std::wstring TFilePath::getLevelNameW() const
{
int i = getLastSlash(m_path); //cerco l'ultimo slash
wstring str = m_path.substr(i + 1); // str e' m_path senza directory
int j = str.rfind(L"."); // str[j..] = ".type"
if (j == (int)wstring::npos)
return str; // no frame; no type
i = str.substr(0, j).rfind(L'.');
if (i == (int)wstring::npos && m_underscoreFormatAllowed)
i = str.substr(0, j).rfind(L'_');
if (j == i || j - i == 1) //prova.tif o prova..tif
return str;
if (!isNumbers(str, i, j))
return str;
//prova.0001.tif
return str.erase(i + 1, j - i - 1);
}
//-----------------------------------------------------------------------------
TFilePath TFilePath::getParentDir() const // noSlash!
{
int i = getLastSlash(m_path); //cerco l'ultimo slash
if (i < 0) {
if (m_path.length() >= 2 && ('a' <= m_path[0] && m_path[0] <= 'z' || 'A' <= m_path[0] && m_path[0] <= 'Z') && m_path[1] == ':')
return TFilePath(m_path.substr(0, 2));
else
return TFilePath("");
} else if (i == 0)
return TFilePath("/");
else
return TFilePath(m_path.substr(0, i));
}
//-----------------------------------------------------------------------------
bool TFilePath::isLevelName() const
{
try {
return getFrame() == TFrameId(TFrameId::EMPTY_FRAME);
}
catch (...) {
return false;
}
}
TFrameId TFilePath::getFrame() const
{
int i = getLastSlash(m_path); //cerco l'ultimo slash
wstring str = m_path.substr(i + 1); // str e' il path senza parentdir
i = str.rfind(L'.');
if (i == (int)wstring::npos || str == L"." || str == L"..")
return TFrameId(TFrameId::NO_FRAME);
int j;
j = str.substr(0, i).rfind(L'.');
if (j == (int)wstring::npos && m_underscoreFormatAllowed)
j = str.substr(0, i).rfind(L'_');
if (j == (int)wstring::npos)
return TFrameId(TFrameId::NO_FRAME);
if (i == j + 1)
return TFrameId(TFrameId::EMPTY_FRAME);
/*-- 間が数字でない場合（ファイル名にまぎれた"_" や "."がある場合）を除外する --*/
if (!isNumbers(str, j, i))
return TFrameId(TFrameId::NO_FRAME);
int k, number = 0;
for (k = j + 1; k < i && iswdigit(str[k]); k++)
number = number * 10 + str[k] - L'0';
char letter = '\0';
if (iswalpha(str[k]))
letter = str[k++] + ('a' - L'a');
if (number == 0 || k < i) // || letter!='\0')
throw(toString(m_path) + ": malformed frame name.");
return TFrameId(number, letter);
}
//-----------------------------------------------------------------------------
TFilePath TFilePath::withType(const string &type) const
{
assert(type.length() < 2 || type.substr(0, 2) != "..");
int i = getLastSlash(m_path); //cerco l'ultimo slash
wstring str = m_path.substr(i + 1); // str e' il path senza parentdir
int j = str.rfind(L'.');
if (j == (int)wstring::npos || str == L"..")
// il path originale non ha tipo
{
if (type == "")
return *this;
else if (type[0] == '.')
return TFilePath(m_path + toWideString(type));
else
return TFilePath(m_path + toWideString("." + type));
} else
// il path originale ha gia' il tipo
{
if (type == "")
return TFilePath(m_path.substr(0, i + j + 1));
else if (type[0] == '.')
return TFilePath(m_path.substr(0, i + j + 1) + toWideString(type));
else
return TFilePath(m_path.substr(0, i + j + 2) + toWideString(type));
}
}
//-----------------------------------------------------------------------------
TFilePath TFilePath::withName(const string &name) const
{
return withName(toWideString(name));
}
//-----------------------------------------------------------------------------
TFilePath TFilePath::withName(const std::wstring &name) const
{
int i = getLastSlash(m_path); //cerco l'ultimo slash
wstring str = m_path.substr(i + 1); // str e' il path senza parentdir
int j;
j = str.rfind(L'.');
if (j == (int)wstring::npos) {
if (m_underscoreFormatAllowed) {
j = str.rfind(L'_');
if (j != (int)wstring::npos)
return TFilePath(m_path.substr(0, i + 1) + name + str.substr(j));
}
return TFilePath(m_path.substr(0, i + 1) + name);
}
int k;
k = str.substr(0, j).rfind(L".");
if (k == (int)wstring::npos && m_underscoreFormatAllowed)
k = str.substr(0, j).rfind(L"_");
if (k == (int)(wstring::npos))
k = j;
else if (k != j - 1 && !isNumbers(str, k, j))
k = j;
return TFilePath(m_path.substr(0, i + 1) + name + str.substr(k));
}
//-----------------------------------------------------------------------------
TFilePath TFilePath::withParentDir(const TFilePath &dir) const
{
int i = getLastSlash(m_path); //cerco l'ultimo slash
return dir + TFilePath(m_path.substr(i + 1));
}
//-----------------------------------------------------------------------------
TFilePath TFilePath::withFrame(const TFrameId &frame, TFrameId::FrameFormat format) const
{
const wstring dot = L".", dotDot = L"..";
int i = getLastSlash(m_path); //cerco l'ultimo slash
wstring str = m_path.substr(i + 1); // str e' il path senza parentdir
assert(str != dot && str != dotDot);
int j = str.rfind(L'.');
char *ch = ".";
if (m_underscoreFormatAllowed &&
(format == TFrameId::UNDERSCORE_FOUR_ZEROS || format == TFrameId::UNDERSCORE_NO_PAD))
ch = "_";
if (j == (int)wstring::npos) {
if (frame.isEmptyFrame() || frame.isNoFrame())
return *this;
else
return TFilePath(m_path + toWideString(ch + frame.expand(format)));
}
string frameString;
if (frame.isNoFrame())
frameString = "";
else
frameString = ch + frame.expand(format);
int k = str.substr(0, j).rfind(L'.');
if (k != (int)wstring::npos)
return TFilePath(m_path.substr(0, k + i + 1) + toWideString(frameString) + str.substr(j));
else if (m_underscoreFormatAllowed) {
k = str.substr(0, j).rfind(L'_');
if (k != (int)wstring::npos &&
(k == j - 1 || isNumbers(str, k, j))) /*-- "_." の並びか、"_[数字]."の並びのとき --*/
return TFilePath(m_path.substr(0, k + i + 1) + ((frame.isNoFrame()) ? L"" : toWideString("_" + frame.expand(format))) + str.substr(j));
}
return TFilePath(m_path.substr(0, j + i + 1) + toWideString(frameString) + str.substr(j));
}
//-----------------------------------------------------------------------------
bool TFilePath::isAncestorOf(const TFilePath &possibleDescendent) const
{
size_t len = m_path.length();
if (len == 0) {
// il punto e' antenato di tutti i path non assoluti
return !possibleDescendent.isAbsolute();
}
// un path e' antenato di se stesso
if (m_path == possibleDescendent.m_path)
return true;
int possibleDescendentLen = possibleDescendent.m_path.length();
// altrimenti l'antenato deve essere piu' corto
if ((int)len >= possibleDescendentLen)
return false;
// e deve coincidere con la prima parte del discendente
if (toLower(m_path) != toLower(possibleDescendent.m_path.substr(0, len)))
return false;
// se l'antenato non finisce con slash ci deve essere uno slash nel discendente, subito dopo
if (m_path[len - 1] != wslash && possibleDescendent.m_path[len] != wslash)
return false;
return true;
}
//-----------------------------------------------------------------------------
TFilePath TFilePath::operator-(const TFilePath &fp) const
{
if (toLower(m_path) == toLower(fp.m_path))
return TFilePath("");
if (!fp.isAncestorOf(*this))
return *this;
int len = fp.m_path.length();
if (len == 0 || fp.m_path[len - 1] != wslash)
len++;
return TFilePath(m_path.substr(len));
}
//-----------------------------------------------------------------------------
bool TFilePath::match(const TFilePath &fp) const
{
return getParentDir() == fp.getParentDir() &&
getName() == fp.getName() &&
getFrame() == fp.getFrame() &&
getType() == fp.getType();
}
//-----------------------------------------------------------------------------
void TFilePath::split(wstring &head, TFilePath &tail) const
{
TFilePath ancestor = getParentDir();
if (ancestor == TFilePath()) {
head = getWideString();
tail = TFilePath();
return;
}
for (;;) {
if (ancestor.isRoot())
break;
TFilePath p = ancestor.getParentDir();
if (p == TFilePath())
break;
ancestor = p;
}
head = ancestor.getWideString();
tail = *this - ancestor;
}