/**************************************************************************** ** ** Implementation of extended char array operations, and TQByteArray and ** TQCString classes ** ** Created : 920722 ** ** Copyright (C) 2010 Timothy Pearson and (C) 1992-2008 Trolltech ASA. ** ** This file is part of the tools module of the TQt GUI Toolkit. ** ** This file may be used under the terms of the GNU General ** Public License versions 2.0 or 3.0 as published by the Free ** Software Foundation and appearing in the files LICENSE.GPL2 ** and LICENSE.GPL3 included in the packaging of this file. ** Alternatively you may (at your option) use any later version ** of the GNU General Public License if such license has been ** publicly approved by Trolltech ASA (or its successors, if any) ** and the KDE Free TQt Foundation. ** ** Please review the following information to ensure GNU General ** Public Licensing requirements will be met: ** http://trolltech.com/products/qt/licenses/licensing/opensource/. ** If you are unsure which license is appropriate for your use, please ** review the following information: ** http://trolltech.com/products/qt/licenses/licensing/licensingoverview ** or contact the sales department at sales@trolltech.com. ** ** This file may be used under the terms of the Q Public License as ** defined by Trolltech ASA and appearing in the file LICENSE.TQPL ** included in the packaging of this file. Licensees holding valid TQt ** Commercial licenses may use this file in accordance with the TQt ** Commercial License Agreement provided with the Software. ** ** This file is provided "AS IS" with NO WARRANTY OF ANY KIND, ** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR ** A PARTICULAR PURPOSE. Trolltech reserves all rights not granted ** herein. ** **********************************************************************/ #include "tqstring.h" #include "tqregexp.h" #include "tqdatastream.h" #ifdef TQT_THREAD_SUPPORT # include #endif // TQT_THREAD_SUPPORT #include #include #include #include #include #ifndef TQT_NO_COMPRESS #include "../3rdparty/zlib/zlib.h" #endif /***************************************************************************** Safe and portable C string functions; extensions to standard string.h *****************************************************************************/ /*! \relates TQCString This function is normally part of the C library. TQt implements memmove() for platforms that do not provide it. memmove() copies \a len bytes from \a src into \a dst. The data is copied correctly even if \a src and \a dst overlap. */ void *tqmemmove( void *dst, const void *src, uint len ) { register char *d; register char *s; if ( dst > src ) { d = (char *)dst + len - 1; s = (char *)src + len - 1; while ( len-- ) *d-- = *s--; } else if ( dst < src ) { d = (char *)dst; s = (char *)src; while ( len-- ) *d++ = *s++; } return dst; } /*! \relates TQCString Returns a duplicate string. Allocates space for a copy of \a src, copies it, and returns a pointer to the copy. If \a src is 0, it immediately returns 0. The returned string must be deleted using \c delete[]. */ char *tqstrdup( const char *src ) { if ( !src ) return 0; char *dst = new char[strlen(src)+1]; TQ_CHECK_PTR( dst ); return strcpy( dst, src ); } /*! \fn char *qstrcpy( char *dst, const char *src ) \relates TQCString A safe strcpy() function. Copies all characters up to and including the '\0' from \a src into \a dst and returns a pointer to \a dst. */ /*! \relates TQCString A safe strncpy() function. Copies at most \a len bytes from \a src (stopping at \a len or the terminating '\0' whichever comes first) into \a dst and returns a pointer to \a dst. Guarantees that \a dst is '\0'-terminated. If \a src or \a dst is 0, returns 0 immediately. \sa qstrcpy() */ char *tqstrncpy( char *dst, const char *src, uint len ) { if ( !src || !dst ) return 0; strncpy( dst, src, len ); if ( len > 0 ) dst[len-1] = '\0'; return dst; } /*! \fn uint tqstrlen( const char *str ); \relates TQCString A safe strlen function. Returns the number of characters that precede the terminating '\0'. or 0 if \a str is 0. */ /*! \fn int qstrcmp( const char *str1, const char *str2 ); \relates TQCString A safe strcmp() function. Compares \a str1 and \a str2. Returns a negative value if \a str1 is less than \a str2, 0 if \a str1 is equal to \a str2 or a positive value if \a str1 is greater than \a str2. Special case I: Returns 0 if \a str1 and \a str2 are both 0. Special case II: Returns a random nonzero value if \a str1 is 0 or \a str2 is 0 (but not both). \sa tqstrncmp() qstricmp() qstrnicmp() \link #asciinotion Note on character comparisons \endlink */ /*! \fn int tqstrncmp( const char *str1, const char *str2, uint len ); \relates TQCString A safe strncmp() function. Compares at most \a len bytes of \a str1 and \a str2. Returns a negative value if \a str1 is less than \a str2, 0 if \a str1 is equal to \a str2 or a positive value if \a str1 is greater than \a str2. Special case I: Returns 0 if \a str1 and \a str2 are both 0. Special case II: Returns a random nonzero value if \a str1 is 0 or \a str2 is 0 (but not both). \sa qstrcmp(), qstricmp(), qstrnicmp() \link #asciinotion Note on character comparisons \endlink */ /*! \relates TQCString A safe stricmp() function. Compares \a str1 and \a str2 ignoring the case. Returns a negative value if \a str1 is less than \a str2, 0 if \a str1 is equal to \a str2 or a positive value if \a str1 is greater than \a str2. Special case I: Returns 0 if \a str1 and \a str2 are both 0. Special case II: Returns a random nonzero value if \a str1 is 0 or \a str2 is 0 (but not both). \sa qstrcmp(), tqstrncmp(), qstrnicmp() \link #asciinotion Note on character comparisons \endlink */ int tqstricmp( const char *str1, const char *str2 ) { register const uchar *s1 = (const uchar *)str1; register const uchar *s2 = (const uchar *)str2; int res; uchar c; if ( !s1 || !s2 ) return s1 ? 1 : ( s2 ? -1 : 0 ); for ( ; !(res = (c=tolower(*s1)) - tolower(*s2)); s1++, s2++ ) if ( !c ) // strings are equal break; return res; } /*! \relates TQCString A safe strnicmp() function. Compares at most \a len bytes of \a str1 and \a str2 ignoring the case. Returns a negative value if \a str1 is less than \a str2, 0 if \a str1 is equal to \a str2 or a positive value if \a str1 is greater than \a str2. Special case I: Returns 0 if \a str1 and \a str2 are both 0. Special case II: Returns a random nonzero value if \a str1 is 0 or \a str2 is 0 (but not both). \sa qstrcmp(), tqstrncmp() qstricmp() \link #asciinotion Note on character comparisons \endlink */ int tqstrnicmp( const char *str1, const char *str2, uint len ) { register const uchar *s1 = (const uchar *)str1; register const uchar *s2 = (const uchar *)str2; int res; uchar c; if ( !s1 || !s2 ) return s1 ? 1 : ( s2 ? -1 : 0 ); for ( ; len--; s1++, s2++ ) { if ( (res = (c=tolower(*s1)) - tolower(*s2)) ) return res; if ( !c ) // strings are equal break; } return 0; } static TQ_UINT16 crc_tbl[16]; static bool crc_tbl_init = FALSE; static void createCRC16Table() // build CRC16 lookup table { register uint i; register uint j; uint v0, v1, v2, v3; for ( i = 0; i < 16; i++ ) { v0 = i & 1; v1 = ( i >> 1 ) & 1; v2 = ( i >> 2 ) & 1; v3 = ( i >> 3 ) & 1; j = 0; #undef SET_BIT #define SET_BIT(x, b, v) (x) |= (v) << (b) SET_BIT( j, 0, v0 ); SET_BIT( j, 7, v0 ); SET_BIT( j, 12, v0 ); SET_BIT( j, 1, v1 ); SET_BIT( j, 8, v1 ); SET_BIT( j, 13, v1 ); SET_BIT( j, 2, v2 ); SET_BIT( j, 9, v2 ); SET_BIT( j, 14, v2 ); SET_BIT( j, 3, v3 ); SET_BIT( j, 10, v3 ); SET_BIT( j, 15, v3 ); crc_tbl[i] = j; } } /*! \relates TQMemArray Returns the CRC-16 checksum of \a len bytes starting at \a data. The checksum is independent of the byte order (endianness). */ TQ_UINT16 qChecksum( const char *data, uint len ) { if ( !crc_tbl_init ) { // create lookup table #ifdef TQT_THREAD_SUPPORT TQMutexLocker locker( tqt_global_mutexpool ? tqt_global_mutexpool->get( &crc_tbl_init ) : 0 ); #endif // TQT_THREAD_SUPPORT if ( !crc_tbl_init ) { createCRC16Table(); crc_tbl_init = TRUE; } } register TQ_UINT16 crc = 0xffff; uchar c; uchar *p = (uchar *)data; while ( len-- ) { c = *p++; crc = ( (crc >> 4) & 0x0fff ) ^ crc_tbl[((crc ^ c) & 15)]; c >>= 4; crc = ( (crc >> 4) & 0x0fff ) ^ crc_tbl[((crc ^ c) & 15)]; } return ~crc & 0xffff; } /*! \fn TQByteArray tqCompress( const TQByteArray& data ) \relates TQByteArray Compresses the array \a data and returns the compressed byte array using zlib. \sa tqUncompress() */ /*! \relates TQByteArray \overload Compresses the array \a data which is \a nbytes long and returns the compressed byte array. */ #ifndef TQT_NO_COMPRESS TQByteArray tqCompress( const uchar* data, int nbytes ) { if ( nbytes == 0 ) { TQByteArray tmp( 4 ); tmp.fill( 0 ); return tmp; } if ( !data ) { #if defined(TQT_CHECK_RANGE) qWarning( "tqCompress: data is NULL." ); #endif return TQByteArray(); } ulong len = nbytes + nbytes / 100 + 13; TQByteArray bazip; int res; do { bazip.resize( len + 4 ); res = ::compress( (uchar*)bazip.data()+4, &len, (uchar*)data, nbytes ); switch ( res ) { case Z_OK: bazip.resize( len + 4 ); bazip[0] = ( nbytes & 0xff000000 ) >> 24; bazip[1] = ( nbytes & 0x00ff0000 ) >> 16; bazip[2] = ( nbytes & 0x0000ff00 ) >> 8; bazip[3] = ( nbytes & 0x000000ff ); break; case Z_MEM_ERROR: #if defined(TQT_CHECK_RANGE) qWarning( "tqCompress: Z_MEM_ERROR: Not enough memory." ); #endif bazip.resize( 0 ); break; case Z_BUF_ERROR: len *= 2; break; } } while ( res == Z_BUF_ERROR ); return bazip; } #endif /*! \fn TQByteArray tqUncompress( const TQByteArray& data ) \relates TQByteArray Uncompresses the array \a data and returns the uncompressed byte array. Returns an empty TQByteArray if the input data was corrupt. \omit ADD THE FOLLOWING FOR TQt 4.0 This function will uncompress data compressed with tqCompress() from this and any earlier TQt version, back to TQt 3.1 when this feature was added. \endomit \sa tqCompress() */ /*! \relates TQByteArray \overload Uncompresses the array \a data which is \a nbytes long and returns the uncompressed byte array. */ #ifndef TQT_NO_COMPRESS TQByteArray tqUncompress( const uchar* data, int nbytes ) { if ( !data ) { #if defined(TQT_CHECK_RANGE) qWarning( "tqUncompress: data is NULL." ); #endif return TQByteArray(); } if ( nbytes <= 4 ) { #if defined(TQT_CHECK_RANGE) if ( nbytes < 4 || ( data[0]!=0 || data[1]!=0 || data[2]!=0 || data[3]!=0 ) ) qWarning( "tqUncompress: Input data is corrupted." ); #endif return TQByteArray(); } ulong expectedSize = ( data[0] << 24 ) | ( data[1] << 16 ) | ( data[2] << 8 ) | data[3]; ulong len = TQMAX( expectedSize, 1 ); TQByteArray baunzip; int res; do { if ( baunzip.tqresize( len ) ) { res = ::uncompress( (uchar*)baunzip.data(), &len, (uchar*)data+4, nbytes-4 ); } else { res = Z_MEM_ERROR; } switch ( res ) { case Z_OK: if ( len != baunzip.size() ) baunzip.resize( len ); break; case Z_MEM_ERROR: #if defined(TQT_CHECK_RANGE) qWarning( "tqUncompress: Z_MEM_ERROR: Not enough memory." ); #endif break; case Z_BUF_ERROR: len *= 2; break; case Z_DATA_ERROR: #if defined(TQT_CHECK_RANGE) qWarning( "tqUncompress: Z_DATA_ERROR: Input data is corrupted." ); #endif break; } } while ( res == Z_BUF_ERROR ); if ( res != Z_OK ) baunzip = TQByteArray(); return baunzip; } #endif /***************************************************************************** TQByteArray documentation *****************************************************************************/ /*! \class TQByteArray \reentrant \brief The TQByteArray class provides an array of bytes. \ingroup collection \ingroup tools The TQByteArray class provides an explicitly shared array of bytes. It is useful for manipulating memory areas with custom data. TQByteArray is implemented as a TQMemArray\. See the \l TQMemArray documentation for further information. */ /*! \fn TQByteArray::TQByteArray() Constructs an empty TQByteArray. */ /*! \fn TQByteArray::TQByteArray( int size ) Constructs a TQByteArray of size \a size. */ // /***************************************************************************** // TQByteArray stream functions // *****************************************************************************/ // // /*! // \relates TQMemArray // // Writes byte array \a a to the stream \a s and returns a reference // to the stream. // // \sa \link datastreamformat.html Format of the TQDataStream operators \endlink // */ // #ifndef TQT_NO_DATASTREAM // // TQDataStream &operator<<( TQDataStream &s, const TQByteArray &a ) // { // return s.writeBytes( a.data(), a.size() ); // } // // /*! // \relates TQMemArray // // Reads a byte array into \a a from the stream \a s and returns a // reference to the stream. // // \sa \link datastreamformat.html Format of the TQDataStream operators \endlink // */ // // TQDataStream &operator>>( TQDataStream &s, TQByteArray &a ) // { // TQ_UINT32 len; // s >> len; // read size of array // if ( len == 0 || s.eof() ) { // end of file reached // a.resize( 0 ); // return s; // } // if ( !a.resize( (uint)len ) ) { // resize array // #if defined(TQT_CHECK_NULL) // qWarning( "TQDataStream: Not enough memory to read TQByteArray" ); // #endif // len = 0; // } // if ( len > 0 ) // not null array // s.readRawBytes( a.data(), (uint)len ); // return s; // } // // #endif //TQT_NO_DATASTREAM #ifdef USE_QT4 /***************************************************************************** TQByteArray stream functions *****************************************************************************/ #ifndef TQT_NO_DATASTREAM TQDataStream &operator<<( TQDataStream &d, const TQByteArray &s ) { if (d.version() >= QDataStream::Qt_4_0) { QDataStream &qds = operator<<(static_cast(d), static_cast(s)); TQDataStream &tqds = *static_cast(&qds); return tqds; } // we need to add a NUL to keep compatibility with Qt 3's QByteArray QByteArray copy = s; copy.append('\0'); QDataStream &qds = operator<<(static_cast(d), static_cast(s)); TQDataStream &tqds = *static_cast(&qds); return tqds; } TQDataStream &operator>>( TQDataStream &d, TQByteArray &s ) { operator>>(d, static_cast(s)); if (d.version() < QDataStream::Qt_4_0 && s.endsWith('\0')) s.chop(1); // ending NUL return d; } #endif // TQT_NO_DATASTREAM #endif // USE_QT4 #ifdef USE_QT4 /*! \reimp */ TQByteArray::~TQByteArray() { } #endif // USE_QT4 /***************************************************************************** TQCString member functions *****************************************************************************/ // #ifdef USE_QT4 #if 0 QT_BEGIN_NAMESPACE /*! Constructs a string with room for \a size characters, including the '\0'-terminator. Makes a null string if \a size == 0. If \a size \> 0, then the first and last characters in the string are initialized to '\0'. All other characters are uninitialized. \sa resize(), isNull() */ // TQCString::TQCString( int size ) // : TQByteArray( size ) // { // if ( size > 0 ) { // *data() = '\0'; // set terminator // *(data()+(size-1)) = '\0'; // } // } TQCString::TQCString( int size ) : TQByteArray(size, '\0') { } /*! Constructs a string that is a deep copy of \a str. If \a str is 0 a null string is created. \sa isNull() */ TQCString::TQCString( const char *str ) { duplicate( str, tqstrlen(str) + 1 ); } /*! Constructs a string that is a deep copy of \a str. The copy will be at most \a maxsize bytes long including the '\0'-terminator. Example: \code TQCString str( "helloworld", 6 ); // assigns "hello" to str \endcode If \a str contains a 0 byte within the first \a maxsize bytes, the resulting TQCString will be terminated by this 0. If \a str is 0 a null string is created. \sa isNull() */ TQCString::TQCString( const char *str, uint maxsize ) { if ( str == 0 ) return; uint len; // index of first '\0' for ( len = 0; len < maxsize - 1; len++ ) { if ( str[len] == '\0' ) break; } TQByteArray::tqresize( len + 1 ); memcpy( data(), str, len ); data()[len] = 0; } // TQCString(int size) : TQByteArray(size, '\0') {} // TQCString(const char *str) : TQByteArray(str) {} // TQCString(const char *str, uint maxlen) : TQByteArray(str, qMin(tqstrlen(str), maxlen - 1)) {} // // TQCString(const char *str, uint maxlen) : TQByteArray(str, TQMIN(tqstrlen(str)+1, maxlen)) {} // This would seem to be more correct at first glance, however it completely breaks kconfig_compiler. As to why, I don't know!!! [FIXME] TQCString &TQCString::operator=(const TQCString &s) { TQByteArray::operator=(s); return *this; } TQCString &TQCString::operator=(const char *str) { // TQByteArray::operator=(str); return *this; TQByteArray::operator=(duplicate( str, tqstrlen(str)+1 )); return *this; } TQCString &TQCString::operator=(const QByteArray &ba) { TQByteArray::operator=(ba); return *this; } /***************************************************************************** TQCString member functions *****************************************************************************/ /*! \class TQCString \reentrant \brief The TQCString class provides an abstraction of the classic C zero-terminated char array (char *). \compat TQCString tries to behave like a more convenient \c{const char *}. The price of doing this is that some algorithms will perform badly. For example, append() is O(length()) since it scans for a null terminator. Although you might use TQCString for text that is never exposed to the user, for most purposes, and especially for user-visible text, you should use QString. QString provides implicit sharing, Unicode and other internationalization support, and is well optimized. Note that for the TQCString methods that take a \c{const char *} parameter the \c{const char *} must either be 0 (null) or not-null and '\0' (NUL byte) terminated; otherwise the results are undefined. A default constructed TQCString is \e null, i.e. both the length and the data pointer are 0 and isNull() returns true. \note However, if you ask for the data pointer of a null TQCString by calling data(), then because the internal representation of the null TQCString is shared, it will be detached and replaced with a non-shared, empty representation, a non-null data pointer will be returned, and subsequent calls to isNull() will return false. But if you ask for the data pointer of a null TQCString by calling constData(), the shared internal representation is not detached, a null data pointer is returned, and subsequent calls to isNull() will continue to return true. A TQCString that references the empty string ("", a single '\0' char) is \e empty, i.e. isEmpty() returns true. Both null and empty TQCStrings are legal parameters to the methods. Assigning \c{const char *} 0 to TQCString produces a null TQCString. The length() function returns the length of the string; resize() resizes the string and truncate() truncates the string. A string can be filled with a character using fill(). Strings can be left or right padded with characters using leftJustify() and rightJustify(). Characters, strings and regular expressions can be searched for using find() and findRev(), and counted using contains(). Strings and characters can be inserted with insert() and appended with append(). A string can be prepended with prepend(). Characters can be removed from the string with remove() and replaced with replace(). Portions of a string can be extracted using left(), right() and mid(). Whitespace can be removed using stripWhiteSpace() and simplifyWhiteSpace(). Strings can be converted to uppercase or lowercase with upper() and lower() respectively. Strings that contain numbers can be converted to numbers with toShort(), toInt(), toLong(), toULong(), toFloat() and toDouble(). Numbers can be converted to strings with setNum(). Many operators are overloaded to work with TQCStrings. TQCString also supports some more obscure functions, e.g. sprintf(), setStr() and setExpand(). \sidebar Note on Character Comparisons In TQCString the notion of uppercase and lowercase and of which character is greater than or less than another character is locale dependent. This affects functions which support a case insensitive option or which compare or lowercase or uppercase their arguments. Case insensitive operations and comparisons will be accurate if both strings contain only ASCII characters. (If \c $LC_CTYPE is set, most Unix systems do "the right thing".) Functions that this affects include contains(), find(), findRev(), \l operator<(), \l operator<=(), \l operator>(), \l operator>=(), lower() and upper(). This issue does not apply to \l{QString}s since they represent characters using Unicode. \endsidebar Performance note: The TQCString methods for QRegExp searching are implemented by converting the TQCString to a QString and performing the search on that. This implies a deep copy of the TQCString data. If you are going to perform many QRegExp searches on a large TQCString, you will get better performance by converting the TQCString to a QString yourself, and then searching in the QString. */ /*! \fn TQCString TQCString::left(uint len) const \internal */ /*! \fn TQCString TQCString::right(uint len) const \internal */ /*! \fn TQCString TQCString::mid(uint index, uint len) const \internal */ /*! \fn TQCString TQCString::lower() const Use QByteArray::toLower() instead. */ /*! \fn TQCString TQCString::upper() const Use QByteArray::toUpper() instead. */ /*! \fn TQCString TQCString::stripWhiteSpace() const Use QByteArray::trimmed() instead. */ /*! \fn TQCString TQCString::simplifyWhiteSpace() const Use QByteArray::simplified() instead. */ /*! \fn TQCString& TQCString::insert(uint index, const char *c) \internal */ /*! \fn TQCString& TQCString::insert(uint index, char c) \internal */ /*! \fn TQCString& TQCString::prepend(const char *c) \internal */ /*! \fn TQCString& TQCString::remove(uint index, uint len) \internal */ /*! \fn TQCString& TQCString::replace(uint index, uint len, const char *c) \internal */ /*! \fn TQCString& TQCString::replace(char c, const TQCString &after) \internal */ /*! \fn TQCString& TQCString::replace(char c, const char *after) \internal */ /*! \fn TQCString& TQCString::replace(const TQCString &b, const TQCString &a) \internal */ /*! \fn TQCString& TQCString::replace(const char *b, const char *a) \internal */ /*! \fn TQCString& TQCString::replace(char b, char a) \internal */ /*! \fn TQCString::TQCString() Constructs a null string. \sa isNull() */ /*! \fn TQCString::TQCString(const QByteArray &ba) Constructs a copy of \a ba. */ /*! \fn TQCString::TQCString(const TQCString &s) Constructs a shallow copy \a s. */ /*! \fn TQCString::TQCString(int size) Constructs a string with room for \a size characters, including the '\0'-terminator. Makes a null string if \a size == 0. If \a size \> 0, then the first and last characters in the string are initialized to '\0'. All other characters are uninitialized. \sa resize(), isNull() */ /*! \fn TQCString::TQCString(const char *str) Constructs a string that is a deep copy of \a str. If \a str is 0 a null string is created. \sa isNull() */ /*! \fn TQCString::TQCString(const char *str, uint maxsize) Constructs a string that is a deep copy of \a str. The copy will be at most \a maxsize bytes long including the '\0'-terminator. Example: \snippet doc/src/snippets/code/src_qt3support_tools_q3cstring.cpp 0 If \a str contains a 0 byte within the first \a maxsize bytes, the resulting TQCString will be terminated by this 0. If \a str is 0 a null string is created. \sa isNull() */ /*! \fn TQCString &TQCString::operator=(const QByteArray &ba) Assigns byte array \a ba to this TQCString. */ /*! \fn TQCString &TQCString::operator=(const TQCString &s) Assigns a shallow copy of \a s to this string and returns a reference to this string. */ /*! \fn TQCString &TQCString::operator=(const char *str) \overload Assigns a deep copy of \a str to this string and returns a reference to this string. If \a str is 0 a null string is created. \sa isNull() */ /* \fn bool TQCString::isNull() const Returns true if the string is null, i.e. if data() == 0; otherwise returns false. A null string is also an empty string. \note If you ask for the data pointer of a null TQCString by calling data(), then because the internal representation of the null TQCString is shared, it will be detached and replaced with a non-shared, empty representation, a non-null data pointer will be returned, and subsequent calls to isNull() will return false. But if you ask for the data pointer of a null TQCString by calling constData(), the shared internal representation is not detached, a null data pointer is returned, and subsequent calls to isNull() will continue to return true. Example: \snippet doc/src/snippets/code/src.qt3support.tools.q3cstring.cpp 1 \sa isEmpty(), length(), size() */ /* \fn bool TQCString::isEmpty() const Returns true if the string is empty, i.e. if length() == 0; otherwise returns false. An empty string is not always a null string. See example in isNull(). \sa isNull(), length(), size() */ /* \fn uint TQCString::length() const Returns the length of the string, excluding the '\0'-terminator. Equivalent to calling \c strlen(data()). Null strings and empty strings have zero length. \sa size(), isNull(), isEmpty() */ /* \fn bool TQCString::truncate(uint pos) Truncates the string at position \a pos. Equivalent to calling \c resize(pos+1). Example: \snippet doc/src/snippets/code/src.qt3support.tools.q3cstring.cpp 2 \sa resize() */ /*! \reimp */ TQCString::~TQCString() { } /*! Implemented as a call to the native vsprintf() (see the manual for your C library). If the string is shorter than 256 characters, this sprintf() calls resize(256) to decrease the chance of memory corruption. The string is resized back to its actual length before sprintf() returns. Example: \snippet doc/src/snippets/code/src_qt3support_tools_q3cstring.cpp 3 \warning All vsprintf() implementations will write past the end of the target string (*this) if the \a format specification and arguments happen to be longer than the target string, and some will also fail if the target string is longer than some arbitrary implementation limit. Giving user-supplied arguments to sprintf() is risky: Sooner or later someone will paste a huge line into your application. */ TQCString &TQCString::sprintf(const char *format, ...) { detach(); va_list ap; va_start(ap, format); if (size() < 256) resize(256); // make string big enough qvsnprintf(data(), size(), format, ap); resize(qstrlen(constData())); va_end(ap); return *this; } /*! \fn TQCString TQCString::copy() const Returns a deep copy of this string. */ /*! Returns a string of length \a width (plus one for the terminating '\0') that contains this string padded with the \a fill character. If the length of the string exceeds \a width and \a truncate is false (the default), then the returned string is a copy of the string. If the length of the string exceeds \a width and \a truncate is true, then the returned string is a left(\a width). Example: \snippet doc/src/snippets/code/src_qt3support_tools_q3cstring.cpp 4 \sa rightJustify() */ TQCString TQCString::leftJustify(uint width, char fill, bool truncate) const { TQCString result; int len = qstrlen(constData()); int padlen = width - len; if (padlen > 0) { result.resize(len+padlen); memcpy(result.data(), constData(), len); memset(result.data()+len, fill, padlen); } else { if (truncate) result = left(width); else result = *this; } return result; } /*! Returns a string of length \a width (plus one for the terminating '\0') that contains zero or more of the \a fill character followed by this string. If the length of the string exceeds \a width and \a truncate is false (the default), then the returned string is a copy of the string. If the length of the string exceeds \a width and \a truncate is true, then the returned string is a left(\a width). Example: \snippet doc/src/snippets/code/src_qt3support_tools_q3cstring.cpp 5 \sa leftJustify() */ TQCString TQCString::rightJustify(uint width, char fill, bool truncate) const { TQCString result; int len = qstrlen(constData()); int padlen = width - len; if (padlen > 0) { result.resize(len+padlen); memset(result.data(), fill, padlen); memcpy(result.data()+padlen, constData(), len); } else { if (truncate) result = left(width); else result = *this; } return result; } /*! Returns the string converted to a \c long value. If \a ok is not 0: *\a ok is set to false if the string is not a number, or if it has trailing garbage; otherwise *\a ok is set to true. */ long TQCString::toLong(bool *ok) const { const char *p = constData(); long val=0; const long max_mult = 214748364; bool is_ok = false; int neg = 0; if (!p) goto bye; while (isspace((uchar) *p)) // skip leading space p++; if (*p == '-') { p++; neg = 1; } else if (*p == '+') { p++; } if (!isdigit((uchar) *p)) goto bye; while (isdigit((uchar) *p)) { if (val > max_mult || (val == max_mult && (*p-'0') > 7+neg)) goto bye; val = 10*val + (*p++ - '0'); } if (neg) val = -val; while (isspace((uchar) *p)) // skip trailing space p++; if (*p == '\0') is_ok = true; bye: if (ok) *ok = is_ok; return is_ok ? val : 0; } /*! Returns the string converted to an \c{unsigned long} value. If \a ok is not 0: *\a ok is set to false if the string is not a number, or if it has trailing garbage; otherwise *\a ok is set to true. */ ulong TQCString::toULong(bool *ok) const { const char *p = constData(); ulong val=0; const ulong max_mult = 429496729; bool is_ok = false; if (!p) goto bye; while (isspace((uchar) *p)) // skip leading space p++; if (*p == '+') p++; if (!isdigit((uchar) *p)) goto bye; while (isdigit((uchar) *p)) { if (val > max_mult || (val == max_mult && (*p-'0') > 5)) goto bye; val = 10*val + (*p++ - '0'); } while (isspace((uchar) *p)) // skip trailing space p++; if (*p == '\0') is_ok = true; bye: if (ok) *ok = is_ok; return is_ok ? val : 0; } /*! Returns the string converted to a \c{short} value. If \a ok is not 0: *\a ok is set to false if the string is not a number, is out of range, or if it has trailing garbage; otherwise *\a ok is set to true. */ short TQCString::toShort(bool *ok) const { long v = toLong(ok); if (ok && *ok && (v < -32768 || v > 32767)) *ok = false; return (short)v; } /*! Returns the string converted to an \c{unsigned short} value. If \a ok is not 0: *\a ok is set to false if the string is not a number, is out of range, or if it has trailing garbage; otherwise *\a ok is set to true. */ ushort TQCString::toUShort(bool *ok) const { ulong v = toULong(ok); if (ok && *ok && (v > 65535)) *ok = false; return (ushort)v; } /*! Returns the string converted to a \c{int} value. If \a ok is not 0: *\a ok is set to false if the string is not a number, or if it has trailing garbage; otherwise *\a ok is set to true. */ int TQCString::toInt(bool *ok) const { return (int)toLong(ok); } /*! Returns the string converted to an \c{unsigned int} value. If \a ok is not 0: *\a ok is set to false if the string is not a number, or if it has trailing garbage; otherwise *\a ok is set to true. */ uint TQCString::toUInt(bool *ok) const { return (uint)toULong(ok); } /*! Returns the string converted to a \c{double} value. If \a ok is not 0: *\a ok is set to false if the string is not a number, or if it has trailing garbage; otherwise *\a ok is set to true. */ double TQCString::toDouble(bool *ok) const { char *end; double val = strtod(constData() ? constData() : "", &end); if (ok) *ok = (constData() && *constData() && (end == 0 || *end == '\0')); return val; } /*! Returns the string converted to a \c{float} value. If \a ok is not 0: *\a ok is set to false if the string is not a number, or if it has trailing garbage; otherwise *\a ok is set to true. */ float TQCString::toFloat(bool *ok) const { return (float)toDouble(ok); } /*! \fn TQCString &TQCString::setStr(const char *str) Makes a deep copy of \a str. Returns a reference to the string. */ /*! \overload Sets the string to the string representation of the number \a n and returns a reference to the string. */ TQCString &TQCString::setNum(long n) { data(); char buf[20]; register char *p = &buf[19]; bool neg; if (n < 0) { neg = true; n = -n; } else { neg = false; } *p = '\0'; do { *--p = ((int)(n%10)) + '0'; n /= 10; } while (n); if (neg) *--p = '-'; *this = p; return *this; } /*! \overload Sets the string to the string representation of the number \a n and returns a reference to the string. */ TQCString &TQCString::setNum(ulong n) { data(); char buf[20]; register char *p = &buf[19]; *p = '\0'; do { *--p = ((int)(n%10)) + '0'; n /= 10; } while (n); *this = p; return *this; } /*! \fn TQCString &TQCString::setNum(int n) \overload Sets the string to the string representation of the number \a n and returns a reference to the string. */ /*! \fn TQCString &TQCString::setNum(uint n) \overload Sets the string to the string representation of the number \a n and returns a reference to the string. */ /*! \fn TQCString &TQCString::setNum(short n) \overload Sets the string to the string representation of the number \a n and returns a reference to the string. */ /*! \fn TQCString &TQCString::setNum(ushort n) \overload Sets the string to the string representation of the number \a n and returns a reference to the string. */ /*! Sets the string to the string representation of the number \a n and returns a reference to the string. The format of the string representation is specified by the format character \a f, and the precision (number of digits after the decimal point) is specified with \a prec. The valid formats for \a f are 'e', 'E', 'f', 'g' and 'G'. The formats are the same as for sprintf(); they are explained in \l QString::arg(). */ TQCString &TQCString::setNum(double n, char f, int prec) { #ifndef QT_NO_DEBUG if (!(f=='f' || f=='F' || f=='e' || f=='E' || f=='g' || f=='G')) qWarning("TQCString::setNum: Invalid format char '%c'", f); #endif char format[20]; register char *fs = format; // generate format string *fs++ = '%'; // "%.l" if (prec > 99) prec = 99; *fs++ = '.'; if (prec >= 10) { *fs++ = prec / 10 + '0'; *fs++ = prec % 10 + '0'; } else { *fs++ = prec + '0'; } *fs++ = 'l'; *fs++ = f; *fs = '\0'; return sprintf(format, n); } /*! \fn TQCString &TQCString::setNum(float n, char f, int prec) \overload */ /*! Sets the character at position \a index to \a c and expands the string if necessary, padding with spaces. Returns false if \a index was out of range and the string could not be expanded; otherwise returns true. */ bool TQCString::setExpand(uint index, char c) { uint oldlen = length(); if (index >= oldlen) { resize(index+1); if (index > oldlen) memset(data() + oldlen, ' ', index - oldlen); } *(data() + index) = c; return true; } /* \fn TQCString::operator const char *() const Returns the string data. */ /*! \fn TQCString& TQCString::append(const char *str) Appends string \a str to the string and returns a reference to the string. Equivalent to operator+=(). */ #ifndef QT_NO_DATASTREAM /*! \fn QDataStream &operator<<(QDataStream &s, const TQCString &str) \relates TQCString Writes string \a str to the stream \a s. \sa \link datastreamformat.html Format of the QDataStream operators \endlink */ QDataStream &operator<<(QDataStream &d, const TQCString &s) { printf("[WARNING] When using << on a QDataStream instead of a TQDataStream functionality may differ from Qt3\n\r"); if (d.version() >= QDataStream::Qt_4_0) return operator<<(d, static_cast(s)); // we need to add a NUL to keep compatibility with Qt 3's QByteArray QByteArray copy = s; copy.append('\0'); return operator<<(d, copy); } /*! \fn QDataStream &operator>>(QDataStream &s, TQCString &str) \relates TQCString Reads a string into \a str from the stream \a s. \sa \link datastreamformat.html Format of the QDataStream operators \endlink */ QDataStream &operator>>(QDataStream &d, TQCString &s) { printf("[WARNING] When using << on a QDataStream instead of a TQDataStream functionality may differ from Qt3\n\r"); operator>>(d, static_cast(s)); if (d.version() < QDataStream::Qt_4_0 && s.endsWith('\0')) s.chop(1); // ending NUL return d; } #if 0 // I don't think this works... /*! \fn TQDataStream &operator<<(TQDataStream &s, const TQCString &str) \relates TQCString Writes string \a str to the stream \a s. \sa \link datastreamformat.html Format of the TQDataStream operators \endlink */ TQDataStream &operator<<(TQDataStream &d, const TQCString &s) { if (d.version() >= QDataStream::Qt_4_0) { QDataStream &qds = operator<<(static_cast(d), static_cast(s)); TQDataStream &tqds = *static_cast(&qds); return tqds; } // we need to add a NUL to keep compatibility with Qt 3's QByteArray QByteArray copy = s; copy.append('\0'); QDataStream &qds = operator<<(static_cast(d), static_cast(s)); TQDataStream &tqds = *static_cast(&qds); return tqds; } /*! \fn TQDataStream &operator>>(TQDataStream &s, TQCString &str) \relates TQCString Reads a string into \a str from the stream \a s. \sa \link datastreamformat.html Format of the TQDataStream operators \endlink */ TQDataStream &operator>>(TQDataStream &d, TQCString &s) { operator>>(d, static_cast(s)); if (d.version() < QDataStream::Qt_4_0 && s.endsWith('\0')) s.chop(1); // ending NUL return d; } #endif #endif /***************************************************************************** TQCString stream functions *****************************************************************************/ #ifndef TQT_NO_DATASTREAM /*! \relates TQCString Writes string \a str to the stream \a s. \sa \link datastreamformat.html Format of the TQDataStream operators \endlink */ TQDataStream &operator<<( TQDataStream &s, const TQCString &str ) { return static_cast(s.writeBytes( str.data(), str.size() )); } /*! \relates TQCString Reads a string into \a str from the stream \a s. \sa \link datastreamformat.html Format of the TQDataStream operators \endlink */ TQDataStream &operator>>( TQDataStream &s, TQCString &str ) { str.detach(); TQ_UINT32 len; s >> len; // read size of string if ( len == 0 || s.eof() ) { // end of file reached str.resize( 0 ); return s; } if ( !str.TQByteArray::tqresize( (uint)len )) {// resize string #if defined(TQT_CHECK_NULL) qWarning( "TQDataStream: Not enough memory to read TQCString" ); #endif len = 0; } if ( len > 0 ) // not null array s.readRawBytes( str.data(), (uint)len ); return s; } #endif //TQT_NO_DATASTREAM /***************************************************************************** Documentation for related functions *****************************************************************************/ /*! \fn bool operator==(const TQCString &s1, const TQCString &s2) \relates TQCString Returns true if \a s1 and \a s2 are equal; otherwise returns false. Equivalent to qstrcmp(\a s1, \a s2) == 0. */ /*! \fn bool operator==(const TQCString &s1, const char *s2) \overload \relates TQCString Returns true if \a s1 and \a s2 are equal; otherwise returns false. Equivalent to qstrcmp(\a s1, \a s2) == 0. */ /*! \fn bool operator==(const char *s1, const TQCString &s2) \overload \relates TQCString Returns true if \a s1 and \a s2 are equal; otherwise returns false. Equivalent to qstrcmp(\a s1, \a s2) == 0. */ /*! \fn bool operator!=(const TQCString &s1, const TQCString &s2) \relates TQCString Returns true if \a s1 and \a s2 are different; otherwise returns false. Equivalent to qstrcmp(\a s1, \a s2) != 0. */ /*! \fn bool operator!=(const TQCString &s1, const char *s2) \overload \relates TQCString Returns true if \a s1 and \a s2 are different; otherwise returns false. Equivalent to qstrcmp(\a s1, \a s2) != 0. */ /*! \fn bool operator!=(const char *s1, const TQCString &s2) \overload \relates TQCString Returns true if \a s1 and \a s2 are different; otherwise returns false. Equivalent to qstrcmp(\a s1, \a s2) != 0. */ /*! \fn bool operator<(const TQCString &s1, const char *s2) \relates TQCString Returns true if \a s1 is less than \a s2; otherwise returns false. Equivalent to qstrcmp(\a s1, \a s2) \< 0. */ /*! \fn bool operator<(const char *s1, const TQCString &s2) \overload \relates TQCString Returns true if \a s1 is less than \a s2; otherwise returns false. Equivalent to qstrcmp(\a s1, \a s2) \< 0. */ /*! \fn bool operator<=(const TQCString &s1, const char *s2) \relates TQCString Returns true if \a s1 is less than or equal to \a s2; otherwise returns false. Equivalent to qstrcmp(\a s1, \a s2) \<= 0. */ /*! \fn bool operator<=(const char *s1, const TQCString &s2) \overload \relates TQCString Returns true if \a s1 is less than or equal to \a s2; otherwise returns false. Equivalent to qstrcmp(\a s1, \a s2) \<= 0. */ /*! \fn bool operator>(const TQCString &s1, const char *s2) \relates TQCString Returns true if \a s1 is greater than \a s2; otherwise returns false. Equivalent to qstrcmp(\a s1, \a s2) \> 0. */ /*! \fn bool operator>(const char *s1, const TQCString &s2) \overload \relates TQCString Returns true if \a s1 is greater than \a s2; otherwise returns false. Equivalent to qstrcmp(\a s1, \a s2) \> 0. */ /*! \fn bool operator>=(const TQCString &s1, const char *s2) \relates TQCString Returns true if \a s1 is greater than or equal to \a s2; otherwise returns false. Equivalent to qstrcmp(\a s1, \a s2) \>= 0. */ /*! \fn bool operator>=(const char *s1, const TQCString &s2) \overload \relates TQCString Returns true if \a s1 is greater than or equal to \a s2; otherwise returns false. Equivalent to qstrcmp(\a s1, \a s2) \>= 0. */ /*! \fn const TQCString operator+(const TQCString &s1, const TQCString &s2) \relates TQCString Returns a string which consists of the concatenation of \a s1 and \a s2. */ /*! \fn const TQCString operator+(const TQCString &s1, const char *s2) \overload \relates TQCString Returns a string which consists of the concatenation of \a s1 and \a s2. */ /*! \fn const TQCString operator+(const char *s1, const TQCString &s2) \overload \relates TQCString Returns a string which consists of the concatenation of \a s1 and \a s2. */ /*! \fn const TQCString operator+(const TQCString &s, char c) \overload \relates TQCString Returns a string which consists of the concatenation of \a s and \a c. */ /*! \fn const TQCString operator+(char c, const TQCString &s) \overload \relates TQCString Returns a string which consists of the concatenation of \a c and \a s. */ /*! Returns the number of times the character \a c occurs in the string. The match is case sensitive if \a cs is TRUE, or case insensitive if \a cs if FALSE. \sa \link #asciinotion Note on character comparisons \endlink */ int TQCString::contains( char c, bool cs ) const { int count = 0; const char *d = data(); if ( !d ) return 0; if ( cs ) { // case sensitive while ( *d ) if ( *d++ == c ) count++; } else { // case insensitive c = tolower( (uchar) c ); while ( *d ) { if ( tolower((uchar) *d) == c ) count++; d++; } } return count; } /*! \overload Counts the number of overlapping occurrences of \a rx in the string. Example: \code TQString s = "banana and panama"; TQRegExp r = TQRegExp( "a[nm]a", TRUE, FALSE ); s.contains( r ); // 4 matches \endcode \sa find(), findRev() \warning If you want to apply this function repeatedly to the same string it is more efficient to convert the string to a TQString and apply the function to that. */ int TQCString::contains( const QRegExp &rx ) const { TQString d = TQString::fromAscii( data() ); return d.contains( rx ); } /*! \overload Returns the number of times \a str occurs in the string. The match is case sensitive if \a cs is TRUE, or case insensitive if \a cs if FALSE. This function counts overlapping substrings, for example, "banana" contains two occurrences of "ana". \sa findRev() \link #asciinotion Note on character comparisons \endlink */ int TQCString::contains( const char *str, bool cs ) const { int count = 0; int i = -1; uint l = length(); // use find for the faster hashing algorithm while ( ( i = find ( str, i+1, cs, l ) ) != -1 ) count++; return count; } #define REHASH( a ) \ if ( sl_minus_1 < sizeof(uint) * CHAR_BIT ) \ hashHaystack -= (a) << sl_minus_1; \ hashHaystack <<= 1 /*! Finds the first occurrence of the character \a c, starting at position \a index. The search is case sensitive if \a cs is TRUE, or case insensitive if \a cs is FALSE. Returns the position of \a c, or -1 if \a c could not be found. \sa \link #asciinotion Note on character comparisons \endlink */ int TQCString::find( char c, int index, bool cs ) const { if ( (uint)index >= size() ) // index outside string return -1; register const char *d; if ( cs ) { // case sensitive d = strchr( data()+index, c ); } else { d = data()+index; c = tolower( (uchar) c ); while ( *d && tolower((uchar) *d) != c ) d++; if ( !*d && c ) // not found d = 0; } return d ? (int)(d - data()) : -1; } /*! \overload Finds the first occurrence of the string \a str, starting at position \a index. The search is case sensitive if \a cs is TRUE, or case insensitive if \a cs is FALSE. Returns the position of \a str, or -1 if \a str could not be found. \sa \link #asciinotion Note on character comparisons \endlink */ int TQCString::find( const char *str, int index, bool cs ) const { return find( str, index, cs, length() ); } #ifndef TQT_NO_REGEXP_CAPTURE /*! \overload Finds the first occurrence of the regular expression \a rx, starting at position \a index. Returns the position of the next match, or -1 if \a rx was not found. \warning If you want to apply this function repeatedly to the same string it is more efficient to convert the string to a TQString and apply the function to that. */ int TQCString::find( const QRegExp& rx, int index ) const { TQString d = TQString::fromAscii( data() ); return d.find( rx, index ); } #endif // TQT_NO_REGEXP_CAPTURE int TQCString::find( const char *str, int index, bool cs, uint l ) const { if ( (uint)index >= size() ) return -1; if ( !str ) return -1; if ( !*str ) return index; const uint sl = tqstrlen( str ); if ( sl + index > l ) return -1; if ( sl == 1 ) return find( *str, index, cs ); /* See TQString::find() for details. */ const char* needle = str; const char* haystack = data() + index; const char* end = data() + (l-sl); const uint sl_minus_1 = sl-1; uint hashNeedle = 0, hashHaystack = 0,i; if ( cs ) { for ( i = 0; i < sl; ++i ) { hashNeedle = ((hashNeedle<<1) + needle[i] ); hashHaystack = ((hashHaystack<<1) + haystack[i] ); } hashHaystack -= *(haystack+sl_minus_1); while ( haystack <= end ) { hashHaystack += *(haystack+sl_minus_1); if ( hashHaystack == hashNeedle && *needle == *haystack && tqstrncmp( needle, haystack, sl ) == 0 ) return haystack - data(); REHASH( *haystack ); ++haystack; } } else { for ( i = 0; i < sl; ++i ) { hashNeedle = ((hashNeedle<<1) + tolower( needle[i] ) ); hashHaystack = ((hashHaystack<<1) + tolower( haystack[i] ) ); } hashHaystack -= tolower(*(haystack+sl_minus_1)); while ( haystack <= end ) { hashHaystack += tolower(*(haystack+sl_minus_1)); if ( hashHaystack == hashNeedle && qstrnicmp( needle, haystack, sl ) == 0 ) return haystack - data(); REHASH( tolower(*haystack) ); ++haystack; } } return -1; } #ifndef TQT_NO_REGEXP /*! \overload Replaces every occurrence of \a rx in the string with \a str. Returns a reference to the string. Example: \code TQString s = "banana"; s.replace( TQRegExp("a.*a"), "" ); // becomes "b" s = "banana"; s.replace( TQRegExp("^[bn]a"), "X" ); // becomes "Xnana" s = "banana"; s.replace( TQRegExp("^[bn]a"), "" ); // becomes "nana" \endcode \warning If you want to apply this function repeatedly to the same string it is more efficient to convert the string to a TQString and apply the function to that. */ TQCString &TQCString::replace( const QRegExp &rx, const char *str ) { TQString d = TQString::fromAscii( data() ); TQString r = TQString::fromAscii( str ); d.replace( rx, r ); setStr( d.ascii() ); return *this; } #endif //TQT_NO_REGEXP /*! Appends string \a str to the string and returns a reference to the string. */ TQCString& TQCString::operator+=( const char *str ) { // if ( !str ) // return *this; // nothing to append // detach(); // uint len1 = length(); // uint len2 = tqstrlen(str); // if ( !TQByteArray::tqresize( len1 + len2 + 1 ) ) // return *this; // no memory // memcpy( data() + len1, str, len2 + 1 ); // return *this; uint len2 = tqstrlen(QByteArray::constData()); QByteArray::tqresize(len2); // Get rid of the old null terminator QByteArray::append(str); return *this; } /*! \overload Appends character \a c to the string and returns a reference to the string. */ TQCString &TQCString::operator+=( char c ) { // detach(); // uint len = length(); // if ( !TQByteArray::tqresize( len + 2 ) ) // return *this; // no memory // *(data() + len) = c; // *(data() + len+1) = '\0'; // return *this; uint len2 = tqstrlen(QByteArray::constData()); QByteArray::tqresize(len2); // Get rid of the old null terminator QByteArray::append(c); return *this; } TQCString& TQCString::operator+=( const QString qs ) { uint len2 = tqstrlen(QByteArray::constData()); QByteArray::tqresize(len2); // Get rid of the old null terminator QByteArray tmp = qs.toAscii(); return append(tmp); } TQCString& TQCString::operator+=( const QByteArray qba ) { uint len2 = tqstrlen(QByteArray::constData()); QByteArray::tqresize(len2); // Get rid of the old null terminator return append(qba); } TQCString& TQCString::operator+=( const TQCString tqcs ) { return operator+=(tqcs.constData()); } QT_END_NAMESPACE #else // USE_QT4 /*! \class TQCString tqcstring.h \reentrant \brief The TQCString class provides an abstraction of the classic C zero-terminated char array (char *). \ingroup text \ingroup collection \ingroup tools \ingroup shared TQCString inherits TQByteArray, which is defined as TQMemArray\. Since TQCString is a TQMemArray, it uses \link shclass.html explicit sharing\endlink with a reference count. TQCString tries to behave like a more convenient \c{const char *}. The price of doing this is that some algorithms will perform badly. For example, append() is O(length()) since it scans for a null terminator. Although you might use TQCString for text that is never exposed to the user, for most purposes, and especially for user-visible text, you should use TQString. TQString provides implicit sharing, Unicode and other internationalization support, and is well optimized. Note that for the TQCString methods that take a \c{const char *} parameter the \c{const char *} must either be 0 (null) or not-null and '\0' (NUL byte) terminated; otherwise the results are undefined. A TQCString that has not been assigned to anything is \e null, i.e. both the length and the data pointer is 0. A TQCString that references the empty string ("", a single '\0' char) is \e empty. Both null and empty TQCStrings are legal parameters to the methods. Assigning \c{const char *} 0 to TQCString produces a null TQCString. The length() function returns the length of the string; resize() resizes the string and truncate() truncates the string. A string can be filled with a character using fill(). Strings can be left or right padded with characters using leftJustify() and rightJustify(). Characters, strings and regular expressions can be searched for using find() and findRev(), and counted using contains(). Strings and characters can be inserted with insert() and appended with append(). A string can be prepended with prepend(). Characters can be removed from the string with remove() and replaced with replace(). Portions of a string can be extracted using left(), right() and mid(). Whitespace can be removed using stripWhiteSpace() and simplifyWhiteSpace(). Strings can be converted to uppercase or lowercase with upper() and lower() respectively. Strings that contain numbers can be converted to numbers with toShort(), toInt(), toLong(), toULong(), toFloat() and toDouble(). Numbers can be converted to strings with setNum(). Many operators are overloaded to work with TQCStrings. TQCString also supports some more obscure functions, e.g. sprintf(), setStr() and setExpand(). \target asciinotion \sidebar Note on Character Comparisons In TQCString the notion of uppercase and lowercase and of which character is greater than or less than another character is locale dependent. This affects functions which support a case insensitive option or which compare or lowercase or uppercase their arguments. Case insensitive operations and comparisons will be accurate if both strings contain only ASCII characters. (If \c $LC_CTYPE is set, most Unix systems do "the right thing".) Functions that this affects include contains(), find(), findRev(), \l operator<(), \l operator<=(), \l operator>(), \l operator>=(), lower() and upper(). This issue does not apply to \l{TQString}s since they represent characters using Unicode. \endsidebar Performance note: The TQCString methods for TQRegExp searching are implemented by converting the TQCString to a TQString and performing the search on that. This implies a deep copy of the TQCString data. If you are going to perform many TQRegExp searches on a large TQCString, you will get better performance by converting the TQCString to a TQString yourself, and then searching in the TQString. */ /*! \fn TQCString::TQCString() Constructs a null string. \sa isNull() */ /*! \fn TQCString::TQCString( const TQCString &s ) Constructs a shallow copy \a s. \sa assign() */ /*! Constructs a string with room for \a size characters, including the '\0'-terminator. Makes a null string if \a size == 0. If \a size \> 0, then the first and last characters in the string are initialized to '\0'. All other characters are uninitialized. \sa resize(), isNull() */ TQCString::TQCString( int size ) : TQByteArray( size ) { if ( size > 0 ) { *data() = '\0'; // set terminator *(data()+(size-1)) = '\0'; } } /*! Constructs a string that is a deep copy of \a str. If \a str is 0 a null string is created. \sa isNull() */ TQCString::TQCString( const char *str ) { duplicate( str, tqstrlen(str) + 1 ); } /*! Constructs a string that is a deep copy of \a str. The copy will be at most \a maxsize bytes long including the '\0'-terminator. Example: \code TQCString str( "helloworld", 6 ); // assigns "hello" to str \endcode If \a str contains a 0 byte within the first \a maxsize bytes, the resulting TQCString will be terminated by this 0. If \a str is 0 a null string is created. \sa isNull() */ TQCString::TQCString( const char *str, uint maxsize ) { if ( str == 0 ) return; uint len; // index of first '\0' for ( len = 0; len < maxsize - 1; len++ ) { if ( str[len] == '\0' ) break; } TQByteArray::tqresize( len + 1 ); memcpy( data(), str, len ); data()[len] = 0; } /*! \reimp */ TQCString::~TQCString() { } TQCString &TQCString::operator=(const QByteArray &ba) { TQByteArray::operator=(ba); return *this; } /*! \fn TQCString &TQCString::operator=( const TQCString &s ) Assigns a shallow copy of \a s to this string and returns a reference to this string. */ /*! \overload TQCString &TQCString::operator=( const char *str ) Assigns a deep copy of \a str to this string and returns a reference to this string. If \a str is 0 a null string is created. \sa isNull() */ /*! \fn bool TQCString::isNull() const Returns TRUE if the string is null, i.e. if data() == 0; otherwise returns FALSE. A null string is also an empty string. Example: \code TQCString a; // a.data() == 0, a.size() == 0, a.length() == 0 TQCString b == ""; // b.data() == "", b.size() == 1, b.length() == 0 a.isNull(); // TRUE because a.data() == 0 a.isEmpty(); // TRUE because a.length() == 0 b.isNull(); // FALSE because b.data() == "" b.isEmpty(); // TRUE because b.length() == 0 \endcode \sa isEmpty(), length(), size() */ /*! \fn bool TQCString::isEmpty() const Returns TRUE if the string is empty, i.e. if length() == 0; otherwise returns FALSE. An empty string is not always a null string. See example in isNull(). \sa isNull(), length(), size() */ /*! \fn uint TQCString::length() const Returns the length of the string, excluding the '\0'-terminator. Equivalent to calling \c strlen(data()). Null strings and empty strings have zero length. \sa size(), isNull(), isEmpty() */ /*! \fn bool TQCString::truncate( uint pos ) Truncates the string at position \a pos. Equivalent to calling \c resize(pos+1). Example: \code TQCString s = "truncate this string"; s.truncate( 5 ); // s == "trunc" \endcode \sa resize() */ /*! Extends or shrinks the string to \a len bytes, including the '\0'-terminator. A '\0'-terminator is set at position \c{len - 1} unless \c{len == 0}. Example: \code TQCString s = "resize this string"; s.resize( 7 ); // s == "resize" \endcode \sa truncate() */ bool TQCString::tqresize( uint len ) { detach(); uint wasNull = isNull(); if ( !TQByteArray::tqresize(len) ) return FALSE; if ( len ) data()[len - 1] = '\0'; if ( len > 0 && wasNull ) data()[0] = '\0'; return TRUE; } /*! Implemented as a call to the native vsprintf() (see the manual for your C library). If the string is shorter than 256 characters, this sprintf() calls resize(256) to decrease the chance of memory corruption. The string is resized back to its actual length before sprintf() returns. Example: \code TQCString s; s.sprintf( "%d - %s", 1, "first" ); // result < 256 chars TQCString big( 25000 ); // very long string big.sprintf( "%d - %s", 2, longString ); // result < 25000 chars \endcode \warning All vsprintf() implementations will write past the end of the target string (*this) if the \a format specification and arguments happen to be longer than the target string, and some will also fail if the target string is longer than some arbitrary implementation limit. Giving user-supplied arguments to sprintf() is risky: Sooner or later someone will paste a huge line into your application. */ TQCString &TQCString::sprintf( const char *format, ... ) { detach(); va_list ap; va_start( ap, format ); if ( size() < 256 ) TQByteArray::tqresize( 256 ); // make string big enough #ifdef TQT_VSNPRINTF TQT_VSNPRINTF( data(), size(), format, ap ); #else vsprintf( data(), format, ap ); #endif resize( tqstrlen(data()) + 1 ); // truncate va_end( ap ); return *this; } /*! Fills the string with \a len bytes of character \a c, followed by a '\0'-terminator. If \a len is negative, then the current string length is used. Returns FALSE is \a len is nonnegative and there is not enough memory to resize the string; otherwise returns TRUE. */ bool TQCString::fill( char c, int len ) { detach(); if ( len < 0 ) len = length(); if ( !TQByteArray::fill(c,len+1) ) return FALSE; *(data()+len) = '\0'; return TRUE; } /*! \fn TQCString TQCString::copy() const Returns a deep copy of this string. \sa detach() */ /*! Finds the first occurrence of the character \a c, starting at position \a index. The search is case sensitive if \a cs is TRUE, or case insensitive if \a cs is FALSE. Returns the position of \a c, or -1 if \a c could not be found. \sa \link #asciinotion Note on character comparisons \endlink */ int TQCString::find( char c, int index, bool cs ) const { if ( (uint)index >= size() ) // index outside string return -1; register const char *d; if ( cs ) { // case sensitive d = strchr( data()+index, c ); } else { d = data()+index; c = tolower( (uchar) c ); while ( *d && tolower((uchar) *d) != c ) d++; if ( !*d && c ) // not found d = 0; } return d ? (int)(d - data()) : -1; } #define REHASH( a ) \ if ( sl_minus_1 < sizeof(uint) * CHAR_BIT ) \ hashHaystack -= (a) << sl_minus_1; \ hashHaystack <<= 1 /*! \overload Finds the first occurrence of the string \a str, starting at position \a index. The search is case sensitive if \a cs is TRUE, or case insensitive if \a cs is FALSE. Returns the position of \a str, or -1 if \a str could not be found. \sa \link #asciinotion Note on character comparisons \endlink */ int TQCString::find( const char *str, int index, bool cs ) const { return find( str, index, cs, length() ); } int TQCString::find( const char *str, int index, bool cs, uint l ) const { if ( (uint)index >= size() ) return -1; if ( !str ) return -1; if ( !*str ) return index; const uint sl = tqstrlen( str ); if ( sl + index > l ) return -1; if ( sl == 1 ) return find( *str, index, cs ); /* See TQString::find() for details. */ const char* needle = str; const char* haystack = data() + index; const char* end = data() + (l-sl); const uint sl_minus_1 = sl-1; uint hashNeedle = 0, hashHaystack = 0,i; if ( cs ) { for ( i = 0; i < sl; ++i ) { hashNeedle = ((hashNeedle<<1) + needle[i] ); hashHaystack = ((hashHaystack<<1) + haystack[i] ); } hashHaystack -= *(haystack+sl_minus_1); while ( haystack <= end ) { hashHaystack += *(haystack+sl_minus_1); if ( hashHaystack == hashNeedle && *needle == *haystack && tqstrncmp( needle, haystack, sl ) == 0 ) return haystack - data(); REHASH( *haystack ); ++haystack; } } else { for ( i = 0; i < sl; ++i ) { hashNeedle = ((hashNeedle<<1) + tolower( needle[i] ) ); hashHaystack = ((hashHaystack<<1) + tolower( haystack[i] ) ); } hashHaystack -= tolower(*(haystack+sl_minus_1)); while ( haystack <= end ) { hashHaystack += tolower(*(haystack+sl_minus_1)); if ( hashHaystack == hashNeedle && qstrnicmp( needle, haystack, sl ) == 0 ) return haystack - data(); REHASH( tolower(*haystack) ); ++haystack; } } return -1; } /*! Finds the first occurrence of the character \a c, starting at position \a index and searching backwards. The search is case sensitive if \a cs is TRUE, or case insensitive if \a cs is FALSE. Returns the position of \a c, or -1 if \a c could not be found. \sa \link #asciinotion Note on character comparisons \endlink */ int TQCString::findRev( char c, int index, bool cs ) const { register const char *b = data(); register const char *d; if ( index < 0 ) index = length(); if ( (uint)index >= size() ) return -1; d = b + index; if ( cs ) { while ( d >= b && *d != c ) d--; } else { c = tolower( (uchar) c ); while ( d >= b && tolower((uchar) *d) != c ) d--; } return d >= b ? (int)(d - b) : -1; } /*! \overload Finds the first occurrence of the string \a str, starting at position \a index and searching backwards. The search is case sensitive if \a cs is TRUE, or case insensitive if \a cs is FALSE. Returns the position of \a str, or -1 if \a str could not be found. \sa \link #asciinotion Note on character comparisons \endlink */ int TQCString::findRev( const char *str, int index, bool cs ) const { /* See TQString::find() for explanations. */ const uint sl = tqstrlen( str ); const uint l = length(); int delta = l-sl; if ( index < 0 ) index = delta; if ( index < 0 || index > (int)l ) return -1; if ( index > delta ) index = delta; if ( sl == 1 ) return findRev( *str, index, cs ); const char* needle = str; const char* haystack = data() + index; const char* end = data(); const uint sl_minus_1 = sl-1; const char* n = needle+sl_minus_1; const char* h = haystack+sl_minus_1; uint hashNeedle = 0, hashHaystack = 0, i; if ( cs ) { for ( i = 0; i < sl; ++i ) { hashNeedle = ((hashNeedle<<1) + *(n-i) ); hashHaystack = ((hashHaystack<<1) + *(h-i) ); } hashHaystack -= *haystack; while ( haystack >= end ) { hashHaystack += *haystack; if ( hashHaystack == hashNeedle && tqstrncmp( needle, haystack, sl ) == 0 ) return haystack-data(); --haystack; REHASH( *(haystack+sl) ); } } else { for ( i = 0; i < sl; ++i ) { hashNeedle = ((hashNeedle<<1) + tolower( *(n-i) ) ); hashHaystack = ((hashHaystack<<1) + tolower( *(h-i) ) ); } hashHaystack -= tolower(*haystack); while ( haystack >= end ) { hashHaystack += tolower(*haystack); if ( hashHaystack == hashNeedle && qstrnicmp( needle, haystack, sl ) == 0 ) return haystack-data(); --haystack; REHASH( tolower(*(haystack+sl)) ); } } return -1; } /*! Returns the number of times the character \a c occurs in the string. The match is case sensitive if \a cs is TRUE, or case insensitive if \a cs if FALSE. \sa \link #asciinotion Note on character comparisons \endlink */ int TQCString::contains( char c, bool cs ) const { int count = 0; const char *d = data(); if ( !d ) return 0; if ( cs ) { // case sensitive while ( *d ) if ( *d++ == c ) count++; } else { // case insensitive c = tolower( (uchar) c ); while ( *d ) { if ( tolower((uchar) *d) == c ) count++; d++; } } return count; } /*! \overload Returns the number of times \a str occurs in the string. The match is case sensitive if \a cs is TRUE, or case insensitive if \a cs if FALSE. This function counts overlapping substrings, for example, "banana" contains two occurrences of "ana". \sa findRev() \link #asciinotion Note on character comparisons \endlink */ int TQCString::contains( const char *str, bool cs ) const { int count = 0; int i = -1; uint l = length(); // use find for the faster hashing algorithm while ( ( i = find ( str, i+1, cs, l ) ) != -1 ) count++; return count; } /*! Returns a substring that contains the \a len leftmost characters of the string. The whole string is returned if \a len exceeds the length of the string. Example: \code TQCString s = "Pineapple"; TQCString t = s.left( 4 ); // t == "Pine" \endcode \sa right(), mid() */ TQCString TQCString::left( uint len ) const { if ( isEmpty() ) { TQCString empty; return empty; } else if ( len >= size() ) { TQCString same( data() ); return same; } else { TQCString s( len+1 ); strncpy( s.data(), data(), len ); *(s.data()+len) = '\0'; return s; } } /*! Returns a substring that contains the \a len rightmost characters of the string. The whole string is returned if \a len exceeds the length of the string. Example: \code TQCString s = "Pineapple"; TQCString t = s.right( 5 ); // t == "apple" \endcode \sa left(), mid() */ TQCString TQCString::right( uint len ) const { if ( isEmpty() ) { TQCString empty; return empty; } else { uint l = length(); if ( len > l ) len = l; char *p = const_cast(data()) + (l - len); return TQCString( p ); } } /*! Returns a substring that contains at most \a len characters from this string, starting at position \a index. Returns a null string if the string is empty or if \a index is out of range. Returns the whole string from \a index if \a index+len exceeds the length of the string. Example: \code TQCString s = "Two pineapples"; TQCString t = s.mid( 4, 3 ); // t == "pin" \endcode \sa left(), right() */ TQCString TQCString::mid( uint index, uint len ) const { uint slen = tqstrlen( data() ); if ( isEmpty() || index >= slen ) { TQCString empty; return empty; } else { if ( len > slen-index ) len = slen - index; register char *p = const_cast(data())+index; TQCString s( len+1 ); strncpy( s.data(), p, len ); *(s.data()+len) = '\0'; return s; } } /*! Returns a string of length \a width (plus one for the terminating '\0') that contains this string padded with the \a fill character. If the length of the string exceeds \a width and \a truncate is FALSE (the default), then the returned string is a copy of the string. If the length of the string exceeds \a width and \a truncate is TRUE, then the returned string is a left(\a width). Example: \code TQCString s("apple"); TQCString t = s.leftJustify(8, '.'); // t == "apple..." \endcode \sa rightJustify() */ TQCString TQCString::leftJustify( uint width, char fill, bool truncate ) const { TQCString result; int len = tqstrlen(data()); int padlen = width - len; if ( padlen > 0 ) { result.TQByteArray::tqresize( len+padlen+1 ); memcpy( result.data(), data(), len ); memset( result.data()+len, fill, padlen ); result[len+padlen] = '\0'; } else { if ( truncate ) result = left( width ); else result = copy(); } return result; } /*! Returns a string of length \a width (plus one for the terminating '\0') that contains zero or more of the \a fill character followed by this string. If the length of the string exceeds \a width and \a truncate is FALSE (the default), then the returned string is a copy of the string. If the length of the string exceeds \a width and \a truncate is TRUE, then the returned string is a left(\a width). Example: \code TQCString s("pie"); TQCString t = s.rightJustify(8, '.'); // t == ".....pie" \endcode \sa leftJustify() */ TQCString TQCString::rightJustify( uint width, char fill, bool truncate ) const { TQCString result; int len = tqstrlen(data()); int padlen = width - len; if ( padlen > 0 ) { result.TQByteArray::tqresize( len+padlen+1 ); memset( result.data(), fill, padlen ); memcpy( result.data()+padlen, data(), len ); result[len+padlen] = '\0'; } else { if ( truncate ) result = left( width ); else result = copy(); } return result; } /*! Returns a new string that is a copy of this string converted to lower case. Example: \code TQCString s("Credit"); TQCString t = s.lower(); // t == "credit" \endcode \sa upper() \link #asciinotion Note on character comparisons \endlink */ TQCString TQCString::lower() const { TQCString s( data() ); register char *p = s.data(); if ( p ) { while ( *p ) { *p = tolower( (uchar) *p ); p++; } } return s; } /*! Returns a new string that is a copy of this string converted to upper case. Example: \code TQCString s( "Debit" ); TQCString t = s.upper(); // t == "DEBIT" \endcode \sa lower() \link #asciinotion Note on character comparisons \endlink */ TQCString TQCString::upper() const { TQCString s( data() ); register char *p = s.data(); if ( p ) { while ( *p ) { *p = toupper(*p); p++; } } return s; } /*! Returns a new string that has white space removed from the start and the end. White space means the decimal ASCII codes 9, 10, 11, 12, 13 and 32. Example: \code TQCString s = " space "; TQCString t = s.stripWhiteSpace(); // t == "space" \endcode \sa simplifyWhiteSpace() */ TQCString TQCString::stripWhiteSpace() const { if ( isEmpty() ) // nothing to do return copy(); register char *s = const_cast(data()); TQCString result = s; int reslen = result.length(); if ( !isspace((uchar) s[0]) && !isspace((uchar) s[reslen-1]) ) return result; // returns a copy s = result.data(); int start = 0; int end = reslen - 1; while ( isspace((uchar) s[start]) ) // skip white space from start start++; if ( s[start] == '\0' ) { // only white space result.resize( 1 ); return result; } while ( end && isspace((uchar) s[end]) ) // skip white space from end end--; end -= start - 1; memmove( result.data(), &s[start], end ); result.resize( end + 1 ); return result; } /*! Returns a new string that has white space removed from the start and the end, plus any sequence of internal white space replaced with a single space (ASCII 32). White space means the decimal ASCII codes 9, 10, 11, 12, 13 and 32. \code TQCString s = " lots\t of\nwhite space "; TQCString t = s.simplifyWhiteSpace(); // t == "lots of white space" \endcode \sa stripWhiteSpace() */ TQCString TQCString::simplifyWhiteSpace() const { if ( isEmpty() ) // nothing to do return copy(); TQCString result( size() ); char *from = const_cast(data()); char *to = result.data(); char *first = to; for ( ;; ) { while ( isspace((uchar) *from) ) from++; while ( *from && !isspace((uchar) *from) ) *to++ = *from++; if ( *from ) *to++ = 0x20; // ' ' else break; } if ( to > first && *(to-1) == 0x20 ) to--; *to = '\0'; result.resize( (int)(to - result.data()) + 1 ); return result; } /*! \overload Inserts string \a s into the string at position \a index. If \a index is beyond the end of the string, the string is padded with spaces (ASCII 32) to length \a index and then \a s is appended. \code TQCString s = "I like fish"; s.insert( 2, "don't "); // s == "I don't like fish" s = "x"; // index 01234 s.insert( 3, "yz" ); // s == "x yz" \endcode */ TQCString &TQCString::insert( uint index, const char *s ) { int len = tqstrlen(s); if ( len == 0 ) return *this; uint olen = length(); int nlen = olen + len; if ( index >= olen ) { // insert after end of string detach(); if ( TQByteArray::tqresize(nlen+index-olen+1 ) ) { memset( data()+olen, ' ', index-olen ); memcpy( data()+index, s, len+1 ); } } else { detach(); if ( TQByteArray::tqresize(nlen+1 ) ) { // normal insert memmove( data()+index+len, data()+index, olen-index+1 ); memcpy( data()+index, s, len ); } } return *this; } /*! Inserts character \a c into the string at position \a index and returns a reference to the string. If \a index is beyond the end of the string, the string is padded with spaces (ASCII 32) to length \a index and then \a c is appended. Example: \code TQCString s = "Yes"; s.insert( 3, '!'); // s == "Yes!" \endcode \sa remove(), replace() */ TQCString &TQCString::insert( uint index, char c ) // insert char { char buf[2]; buf[0] = c; buf[1] = '\0'; return insert( index, buf ); } /*! \fn TQCString &TQCString::prepend( const char *s ) Prepend \a s to the string. Equivalent to insert(0, s). \sa insert() */ /*! Removes \a len characters from the string, starting at position \a index, and returns a reference to the string. If \a index is out of range, nothing happens. If \a index is valid, but \a index + \a len is larger than the length of the string, the string is truncated at position \a index. \code TQCString s = "Montreal"; s.remove( 1, 4 ); // s == "Meal" \endcode \sa insert(), replace() */ TQCString &TQCString::remove( uint index, uint len ) { uint olen = length(); if ( index + len >= olen ) { // range problems if ( index < olen ) { // index ok detach(); resize( index+1 ); } } else if ( len != 0 ) { detach(); memmove( data()+index, data()+index+len, olen-index-len+1 ); TQByteArray::tqresize(olen-len+1 ); } return *this; } /*! Replaces \a len characters from the string, starting at position \a index, with \a str, and returns a reference to the string. If \a index is out of range, nothing is removed and \a str is appended at the end of the string. If \a index is valid, but \a index + \a len is larger than the length of the string, \a str replaces the rest of the string from position \a index. \code TQCString s = "Say yes!"; s.replace( 4, 3, "NO" ); // s == "Say NO!" \endcode \sa insert(), remove() */ TQCString &TQCString::replace( uint index, uint len, const char *str ) { remove( index, len ); insert( index, str ); return *this; } /*! \overload Replaces every occurrence of the character \a c in the string with \a after. Returns a reference to the string. Example: \code TQCString s = "a,b,c"; s.replace( ',', " or " ); // s == "a or b or c" \endcode */ TQCString &TQCString::replace( char c, const char *after ) { char str[2]; str[0] = c; str[1] = '\0'; return replace( str, after ); } /*! \overload Replaces every occurrence of the string \a before in the string with the string \a after. Returns a reference to the string. Example: \code TQCString s = "Greek is Greek"; s.replace( "Greek", "English" ); // s == "English is English" \endcode */ TQCString &TQCString::replace( const char *before, const char *after ) { if ( before == after || isNull() ) return *this; detach(); int index = 0; const int bl = before ? int(strlen( before )) : 0; const int al = after ? int(strlen( after )) : 0; char *d = data(); uint len = length(); if ( bl == al ) { if ( bl ) { while( (index = find( before, index, TRUE, len ) ) != -1 ) { memcpy( d+index, after, al ); index += bl; } } } else if ( al < bl ) { uint to = 0; uint movestart = 0; uint num = 0; while( (index = find( before, index, TRUE, len ) ) != -1 ) { if ( num ) { int msize = index - movestart; if ( msize > 0 ) { memmove( d + to, d + movestart, msize ); to += msize; } } else { to = index; } if ( al ) { memcpy( d + to, after, al ); to += al; } index += bl; movestart = index; num++; } if ( num ) { int msize = len - movestart; if ( msize > 0 ) memmove( d + to, d + movestart, msize ); resize( len - num*(bl-al) + 1 ); } } else { // the most complex case. We don't want to loose performance by doing repeated // copies and reallocs of the string. while( index != -1 ) { uint indices[4096]; uint pos = 0; while( pos < 4095 ) { index = find(before, index, TRUE, len); if ( index == -1 ) break; indices[pos++] = index; index += bl; // avoid infinite loop if ( !bl ) index++; } if ( !pos ) break; // we have a table of replacement positions, use them for fast replacing int adjust = pos*(al-bl); // index has to be adjusted in case we get back into the loop above. if ( index != -1 ) index += adjust; uint newlen = len + adjust; int moveend = len; if ( newlen > len ) { resize( newlen + 1 ); len = newlen; } d = data(); while( pos ) { pos--; int movestart = indices[pos] + bl; int insertstart = indices[pos] + pos*(al-bl); int moveto = insertstart + al; memmove( d + moveto, d + movestart, (moveend - movestart) ); if ( after ) memcpy( d + insertstart, after, al ); moveend = movestart - bl; } } } return *this; } /*! \overload Replaces every occurrence of \a c1 with the char \a c2. Returns a reference to the string. */ TQCString &TQCString::replace( char c1, char c2 ) { detach(); uint i = 0; char *d = data(); uint len = length(); while ( i < len ) { if ( d[i] == c1 ) d[i] = c2; i++; } return *this; } #ifndef TQT_NO_REGEXP_CAPTURE /*! \overload Finds the first occurrence of the regular expression \a rx, starting at position \a index. Returns the position of the next match, or -1 if \a rx was not found. \warning If you want to apply this function repeatedly to the same string it is more efficient to convert the string to a TQString and apply the function to that. */ int TQCString::find( const TQRegExp& rx, int index ) const { TQString d = TQString::fromAscii( data() ); return d.find( rx, index ); } /*! \overload Finds the first occurrence of the regular expression \a rx, starting at position \a index and searching backwards. Returns the position of the next match (backwards), or -1 if \a rx was not found. \warning If you want to apply this function repeatedly to the same string it is more efficient to convert the string to a TQString and apply the function to that. */ int TQCString::findRev( const TQRegExp& rx, int index ) const { TQString d = TQString::fromAscii( data() ); return d.findRev( rx, index ); } /*! \overload Counts the number of overlapping occurrences of \a rx in the string. Example: \code TQString s = "banana and panama"; TQRegExp r = TQRegExp( "a[nm]a", TRUE, FALSE ); s.contains( r ); // 4 matches \endcode \sa find(), findRev() \warning If you want to apply this function repeatedly to the same string it is more efficient to convert the string to a TQString and apply the function to that. */ int TQCString::contains( const TQRegExp &rx ) const { TQString d = TQString::fromAscii( data() ); return d.contains( rx ); } /*! \overload Replaces every occurrence of \a rx in the string with \a str. Returns a reference to the string. Example: \code TQString s = "banana"; s.replace( TQRegExp("a.*a"), "" ); // becomes "b" s = "banana"; s.replace( TQRegExp("^[bn]a"), "X" ); // becomes "Xnana" s = "banana"; s.replace( TQRegExp("^[bn]a"), "" ); // becomes "nana" \endcode \warning If you want to apply this function repeatedly to the same string it is more efficient to convert the string to a TQString and apply the function to that. */ TQCString &TQCString::replace( const TQRegExp &rx, const char *str ) { TQString d = TQString::fromAscii( data() ); TQString r = TQString::fromAscii( str ); d.replace( rx, r ); setStr( d.ascii() ); return *this; } #endif //TQT_NO_REGEXP /*! Returns the string converted to a \c long value. If \a ok is not 0: \a *ok is set to FALSE if the string is not a number, or if it has trailing garbage; otherwise \a *ok is set to TRUE. */ long TQCString::toLong( bool *ok ) const { char *p = const_cast(data()); long val=0; const long max_mult = LONG_MAX / 10; bool is_ok = FALSE; int neg = 0; if ( !p ) goto bye; while ( isspace((uchar) *p) ) // skip leading space p++; if ( *p == '-' ) { p++; neg = 1; } else if ( *p == '+' ) { p++; } if ( !isdigit((uchar) *p) ) goto bye; while ( isdigit((uchar) *p) ) { if ( val > max_mult || (val == max_mult && (*p-'0') > 7+neg) ) goto bye; val = 10*val + (*p++ - '0'); } if ( neg ) val = -val; while ( isspace((uchar) *p) ) // skip trailing space p++; if ( *p == '\0' ) is_ok = TRUE; bye: if ( ok ) *ok = is_ok; return is_ok ? val : 0; } /*! Returns the string converted to an \c{unsigned long} value. If \a ok is not 0: \a *ok is set to FALSE if the string is not a number, or if it has trailing garbage; otherwise \a *ok is set to TRUE. */ ulong TQCString::toULong( bool *ok ) const { char *p = const_cast(data()); ulong val=0; const ulong max_mult = ULONG_MAX / 10; bool is_ok = FALSE; if ( !p ) goto bye; while ( isspace((uchar) *p) ) // skip leading space p++; if ( *p == '+' ) p++; if ( !isdigit((uchar) *p) ) goto bye; while ( isdigit((uchar) *p) ) { if ( val > max_mult || (val == max_mult && (*p-'0') > 5) ) goto bye; val = 10*val + (*p++ - '0'); } while ( isspace((uchar) *p) ) // skip trailing space p++; if ( *p == '\0' ) is_ok = TRUE; bye: if ( ok ) *ok = is_ok; return is_ok ? val : 0; } /*! Returns the string converted to a \c{short} value. If \a ok is not 0: \a *ok is set to FALSE if the string is not a number, is out of range, or if it has trailing garbage; otherwise \a *ok is set to TRUE. */ short TQCString::toShort( bool *ok ) const { long v = toLong( ok ); if ( v < SHRT_MIN || v > SHRT_MAX ) { if ( ok ) *ok = FALSE; v = 0; } return (short)v; } /*! Returns the string converted to an \c{unsigned short} value. If \a ok is not 0: \a *ok is set to FALSE if the string is not a number, is out of range, or if it has trailing garbage; otherwise \a *ok is set to TRUE. */ ushort TQCString::toUShort( bool *ok ) const { ulong v = toULong( ok ); if ( v > USHRT_MAX ) { if ( ok ) *ok = FALSE; v = 0; } return (ushort)v; } /*! Returns the string converted to a \c{int} value. If \a ok is not 0: \a *ok is set to FALSE if the string is not a number, or if it has trailing garbage; otherwise \a *ok is set to TRUE. */ int TQCString::toInt( bool *ok ) const { long v = toLong( ok ); if ( v < INT_MIN || v > INT_MAX ) { if ( ok ) *ok = FALSE; v = 0; } return (int)v; } /*! Returns the string converted to an \c{unsigned int} value. If \a ok is not 0: \a *ok is set to FALSE if the string is not a number, or if it has trailing garbage; otherwise \a *ok is set to TRUE. */ uint TQCString::toUInt( bool *ok ) const { ulong v = toULong( ok ); if ( v > UINT_MAX ) { if ( ok ) *ok = FALSE; v = 0; } return (uint)v; } /*! Returns the string converted to a \c{double} value. If \a ok is not 0: \a *ok is set to FALSE if the string is not a number, or if it has trailing garbage; otherwise \a *ok is set to TRUE. */ double TQCString::toDouble( bool *ok ) const { char *end; double val = strtod( data() ? data() : "", &end ); if ( ok ) *ok = ( data() && *data() && ( end == 0 || *end == '\0' ) ); return val; } /*! Returns the string converted to a \c{float} value. If \a ok is not 0: \a *ok is set to FALSE if the string is not a number, or if it has trailing garbage; otherwise \a *ok is set to TRUE. */ float TQCString::toFloat( bool *ok ) const { return (float)toDouble( ok ); } /*! Makes a deep copy of \a str. Returns a reference to the string. */ TQCString &TQCString::setStr( const char *str ) { detach(); if ( str ) { // valid string // store( str, tqstrlen(str)+1 ); int slen = tqstrlen(str)+1; resize(slen); memcpy(QByteArray::data(), str, slen); } else // empty resize( 0 ); return *this; } /*! \overload Sets the string to the string representation of the number \a n and returns a reference to the string. */ TQCString &TQCString::setNum( long n ) { detach(); char buf[20]; register char *p = &buf[19]; bool neg; if ( n < 0 ) { neg = TRUE; n = -n; } else { neg = FALSE; } *p = '\0'; do { *--p = ((int)(n%10)) + '0'; n /= 10; } while ( n ); if ( neg ) *--p = '-'; // store( p, tqstrlen(p)+1 ); int slen = tqstrlen(p)+1; resize(slen); memcpy(QByteArray::data(), p, slen); return *this; } /*! \overload Sets the string to the string representation of the number \a n and returns a reference to the string. */ TQCString &TQCString::setNum( ulong n ) { detach(); char buf[20]; register char *p = &buf[19]; *p = '\0'; do { *--p = ((int)(n%10)) + '0'; n /= 10; } while ( n ); // store( p, tqstrlen(p)+1 ); int slen = tqstrlen(p)+1; resize(slen); memcpy(QByteArray::data(), p, slen); return *this; } /*! \overload TQCString &TQCString::setNum( int n ) Sets the string to the string representation of the number \a n and returns a reference to the string. */ /*! \overload TQCString &TQCString::setNum( uint n ) Sets the string to the string representation of the number \a n and returns a reference to the string. */ /*! \overload TQCString &TQCString::setNum( short n ) Sets the string to the string representation of the number \a n and returns a reference to the string. */ /*! \overload TQCString &TQCString::setNum( ushort n ) Sets the string to the string representation of the number \a n and returns a reference to the string. */ /*! Sets the string to the string representation of the number \a n and returns a reference to the string. The format of the string representation is specified by the format character \a f, and the precision (number of digits after the decimal point) is specified with \a prec. The valid formats for \a f are 'e', 'E', 'f', 'g' and 'G'. The formats are the same as for sprintf(); they are explained in \l TQString::arg(). */ TQCString &TQCString::setNum( double n, char f, int prec ) { #if defined(TQT_CHECK_RANGE) if ( !(f=='f' || f=='F' || f=='e' || f=='E' || f=='g' || f=='G') ) qWarning( "TQCString::setNum: Invalid format char '%c'", f ); #endif char format[20]; register char *fs = format; // generate format string *fs++ = '%'; // "%.l" if ( prec > 99 ) prec = 99; *fs++ = '.'; if ( prec >= 10 ) { *fs++ = prec / 10 + '0'; *fs++ = prec % 10 + '0'; } else { *fs++ = prec + '0'; } *fs++ = 'l'; *fs++ = f; *fs = '\0'; return sprintf( format, n ); } /*! \overload TQCString &TQCString::setNum( float n, char f, int prec ) */ /*! Sets the character at position \a index to \a c and expands the string if necessary, padding with spaces. Returns FALSE if \a index was out of range and the string could not be expanded; otherwise returns TRUE. */ bool TQCString::setExpand( uint index, char c ) { detach(); uint oldlen = length(); if ( index >= oldlen ) { if ( !TQByteArray::tqresize( index+2 ) ) // no memory return FALSE; if ( index > oldlen ) memset( data() + oldlen, ' ', index - oldlen ); *(data() + index+1) = '\0'; // terminate padded string } *(data() + index) = c; return TRUE; } /*! \fn TQCString::operator const char *() const Returns the string data. */ /*! \fn TQCString& TQCString::append( const char *str ) Appends string \a str to the string and returns a reference to the string. Equivalent to operator+=(). */ /*! Appends string \a str to the string and returns a reference to the string. */ TQCString& TQCString::operator+=( const char *str ) { if ( !str ) return *this; // nothing to append detach(); uint len1 = length(); uint len2 = tqstrlen(str); if ( !TQByteArray::tqresize( len1 + len2 + 1 ) ) return *this; // no memory memcpy( data() + len1, str, len2 + 1 ); return *this; } /*! \overload Appends character \a c to the string and returns a reference to the string. */ TQCString &TQCString::operator+=( char c ) { detach(); uint len = length(); if ( !TQByteArray::tqresize( len + 2 ) ) return *this; // no memory *(data() + len) = c; *(data() + len+1) = '\0'; return *this; } TQCString& TQCString::operator+=( const QString qs ) { uint len2 = tqstrlen(QByteArray::constData()); TQByteArray::tqresize(len2); // Get rid of the old null terminator QByteArray tmp = qs.toAscii(); return append(tmp); } TQCString& TQCString::operator+=( const QByteArray qba ) { uint len2 = tqstrlen(QByteArray::constData()); TQByteArray::tqresize(len2); // Get rid of the old null terminator return append(qba); } TQCString& TQCString::operator+=( const TQCString tqcs ) { return operator+=(tqcs.constData()); } /***************************************************************************** TQCString stream functions *****************************************************************************/ #ifndef TQT_NO_DATASTREAM /*! \relates TQCString Writes string \a str to the stream \a s. \sa \link datastreamformat.html Format of the TQDataStream operators \endlink */ TQDataStream &operator<<( TQDataStream &s, const TQCString &str ) { return static_cast(s.writeBytes( str.data(), str.size() )); } /*! \relates TQCString Reads a string into \a str from the stream \a s. \sa \link datastreamformat.html Format of the TQDataStream operators \endlink */ TQDataStream &operator>>( TQDataStream &s, TQCString &str ) { str.detach(); TQ_UINT32 len; s >> len; // read size of string if ( len == 0 || s.eof() ) { // end of file reached str.resize( 0 ); return s; } if ( !str.TQByteArray::tqresize( (uint)len )) {// resize string #if defined(TQT_CHECK_NULL) qWarning( "TQDataStream: Not enough memory to read TQCString" ); #endif len = 0; } if ( len > 0 ) // not null array s.readRawBytes( str.data(), (uint)len ); return s; } #endif //TQT_NO_DATASTREAM /***************************************************************************** Documentation for related functions *****************************************************************************/ /*! \fn bool operator==( const TQCString &s1, const TQCString &s2 ) \relates TQCString Returns TRUE if \a s1 and \a s2 are equal; otherwise returns FALSE. Equivalent to qstrcmp(\a s1, \a s2) == 0. */ /*! \overload bool operator==( const TQCString &s1, const char *s2 ) \relates TQCString Returns TRUE if \a s1 and \a s2 are equal; otherwise returns FALSE. Equivalent to qstrcmp(\a s1, \a s2) == 0. */ /*! \overload bool operator==( const char *s1, const TQCString &s2 ) \relates TQCString Returns TRUE if \a s1 and \a s2 are equal; otherwise returns FALSE. Equivalent to qstrcmp(\a s1, \a s2) == 0. */ /*! \fn bool operator!=( const TQCString &s1, const TQCString &s2 ) \relates TQCString Returns TRUE if \a s1 and \a s2 are different; otherwise returns FALSE. Equivalent to qstrcmp(\a s1, \a s2) != 0. */ /*! \overload bool operator!=( const TQCString &s1, const char *s2 ) \relates TQCString Returns TRUE if \a s1 and \a s2 are different; otherwise returns FALSE. Equivalent to qstrcmp(\a s1, \a s2) != 0. */ /*! \overload bool operator!=( const char *s1, const TQCString &s2 ) \relates TQCString Returns TRUE if \a s1 and \a s2 are different; otherwise returns FALSE. Equivalent to qstrcmp(\a s1, \a s2) != 0. */ /*! \fn bool operator<( const TQCString &s1, const char *s2 ) \relates TQCString Returns TRUE if \a s1 is less than \a s2; otherwise returns FALSE. Equivalent to qstrcmp(\a s1, \a s2) \< 0. \sa \link #asciinotion Note on character comparisons \endlink */ /*! \overload bool operator<( const char *s1, const TQCString &s2 ) \relates TQCString Returns TRUE if \a s1 is less than \a s2; otherwise returns FALSE. Equivalent to qstrcmp(\a s1, \a s2) \< 0. \sa \link #asciinotion Note on character comparisons \endlink */ /*! \fn bool operator<=( const TQCString &s1, const char *s2 ) \relates TQCString Returns TRUE if \a s1 is less than or equal to \a s2; otherwise returns FALSE. Equivalent to qstrcmp(\a s1, \a s2) \<= 0. \sa \link #asciinotion Note on character comparisons \endlink */ /*! \overload bool operator<=( const char *s1, const TQCString &s2 ) \relates TQCString Returns TRUE if \a s1 is less than or equal to \a s2; otherwise returns FALSE. Equivalent to qstrcmp(\a s1, \a s2) \<= 0. \sa \link #asciinotion Note on character comparisons \endlink */ /*! \fn bool operator>( const TQCString &s1, const char *s2 ) \relates TQCString Returns TRUE if \a s1 is greater than \a s2; otherwise returns FALSE. Equivalent to qstrcmp(\a s1, \a s2) \> 0. \sa \link #asciinotion Note on character comparisons \endlink */ /*! \overload bool operator>( const char *s1, const TQCString &s2 ) \relates TQCString Returns TRUE if \a s1 is greater than \a s2; otherwise returns FALSE. Equivalent to qstrcmp(\a s1, \a s2) \> 0. \sa \link #asciinotion Note on character comparisons \endlink */ /*! \fn bool operator>=( const TQCString &s1, const char *s2 ) \relates TQCString Returns TRUE if \a s1 is greater than or equal to \a s2; otherwise returns FALSE. Equivalent to qstrcmp(\a s1, \a s2) \>= 0. \sa \link #asciinotion Note on character comparisons \endlink */ /*! \overload bool operator>=( const char *s1, const TQCString &s2 ) \relates TQCString Returns TRUE if \a s1 is greater than or equal to \a s2; otherwise returns FALSE. Equivalent to qstrcmp(\a s1, \a s2) \>= 0. \sa \link #asciinotion Note on character comparisons \endlink */ /*! \fn const TQCString operator+( const TQCString &s1, const TQCString &s2 ) \relates TQCString Returns a string which consists of the concatenation of \a s1 and \a s2. */ /*! \overload const TQCString operator+( const TQCString &s1, const char *s2 ) \relates TQCString Returns a string which consists of the concatenation of \a s1 and \a s2. */ /*! \overload const TQCString operator+( const char *s1, const TQCString &s2 ) \relates TQCString Returns a string which consists of the concatenation of \a s1 and \a s2. */ /*! \overload const TQCString operator+( const TQCString &s, char c ) \relates TQCString Returns a string which consists of the concatenation of \a s and \a c. */ /*! \overload const TQCString operator+( char c, const TQCString &s ) \relates TQCString Returns a string which consists of the concatenation of \a c and \a s. */ #endif // USE_QT4