diff options
Diffstat (limited to 'src/corelib/tools/qbytearray.cpp')
| -rw-r--r-- | src/corelib/tools/qbytearray.cpp | 123 |
1 files changed, 54 insertions, 69 deletions
diff --git a/src/corelib/tools/qbytearray.cpp b/src/corelib/tools/qbytearray.cpp index 1e591d6d69..5f5302107b 100644 --- a/src/corelib/tools/qbytearray.cpp +++ b/src/corelib/tools/qbytearray.cpp @@ -165,7 +165,7 @@ int qFindByteArray( This function returns SIZE_MAX (~0) on overflow or if the memory block size would not fit an int. */ -size_t qCalculateBlockSize(size_t elementCount, size_t elementSize, size_t headerSize) Q_DECL_NOTHROW +size_t qCalculateBlockSize(size_t elementCount, size_t elementSize, size_t headerSize) noexcept { unsigned count = unsigned(elementCount); unsigned size = unsigned(elementSize); @@ -206,7 +206,7 @@ size_t qCalculateBlockSize(size_t elementCount, size_t elementSize, size_t heade needed. */ CalculateGrowingBlockSizeResult -qCalculateGrowingBlockSize(size_t elementCount, size_t elementSize, size_t headerSize) Q_DECL_NOTHROW +qCalculateGrowingBlockSize(size_t elementCount, size_t elementSize, size_t headerSize) noexcept { CalculateGrowingBlockSizeResult result = { std::numeric_limits<size_t>::max(),std::numeric_limits<size_t>::max() @@ -239,8 +239,8 @@ qCalculateGrowingBlockSize(size_t elementCount, size_t elementSize, size_t heade 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 nullptr, it immediately returns - nullptr. + pointer to the copy. If \a src is \nullptr, it immediately returns + \nullptr. Ownership is passed to the caller, so the returned string must be deleted using \c delete[]. @@ -258,7 +258,7 @@ char *qstrdup(const char *src) Copies all the characters up to and including the '\\0' from \a src into \a dst and returns a pointer to \a dst. If \a src is - nullptr, it immediately returns nullptr. + \nullptr, it immediately returns \nullptr. This function assumes that \a dst is large enough to hold the contents of \a src. @@ -291,7 +291,7 @@ char *qstrcpy(char *dst, const char *src) 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 nullptr, returns nullptr immediately. + \a src or \a dst is \nullptr, returns \nullptr immediately. This function assumes that \a dst is at least \a len characters long. @@ -326,7 +326,7 @@ char *qstrncpy(char *dst, const char *src, uint len) A safe \c strlen() function. Returns the number of characters that precede the terminating '\\0', - or 0 if \a str is nullptr. + or 0 if \a str is \nullptr. \sa qstrnlen() */ @@ -338,7 +338,7 @@ char *qstrncpy(char *dst, const char *src, uint len) A safe \c strnlen() function. Returns the number of characters that precede the terminating '\\0', but - at most \a maxlen. If \a str is nullptr, returns 0. + at most \a maxlen. If \a str is \nullptr, returns 0. \sa qstrlen() */ @@ -352,10 +352,10 @@ char *qstrncpy(char *dst, const char *src, uint len) 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 1: Returns 0 if \a str1 and \a str2 are both nullptr. + Special case 1: Returns 0 if \a str1 and \a str2 are both \nullptr. Special case 2: Returns an arbitrary non-zero value if \a str1 is - nullptr or \a str2 is nullptr (but not both). + \nullptr or \a str2 is \nullptr (but not both). \sa qstrncmp(), qstricmp(), qstrnicmp(), {8-bit Character Comparisons}, QByteArray::compare() @@ -378,10 +378,10 @@ int qstrcmp(const char *str1, const char *str2) str1 is equal to \a str2 or a positive value if \a str1 is greater than \a str2. - Special case 1: Returns 0 if \a str1 and \a str2 are both nullptr. + Special case 1: Returns 0 if \a str1 and \a str2 are both \nullptr. - Special case 2: Returns a random non-zero value if \a str1 is nullptr - or \a str2 is nullptr (but not both). + Special case 2: Returns a random non-zero value if \a str1 is \nullptr + or \a str2 is \nullptr (but not both). \sa qstrcmp(), qstricmp(), qstrnicmp(), {8-bit Character Comparisons}, QByteArray::compare() @@ -398,10 +398,10 @@ int qstrcmp(const char *str1, const char *str2) str1 is equal to \a str2 or a positive value if \a str1 is greater than \a str2. - Special case 1: Returns 0 if \a str1 and \a str2 are both nullptr. + Special case 1: Returns 0 if \a str1 and \a str2 are both \nullptr. - Special case 2: Returns a random non-zero value if \a str1 is nullptr - or \a str2 is nullptr (but not both). + Special case 2: Returns a random non-zero value if \a str1 is \nullptr + or \a str2 is \nullptr (but not both). \sa qstrcmp(), qstrncmp(), qstrnicmp(), {8-bit Character Comparisons}, QByteArray::compare() @@ -491,10 +491,10 @@ int qstricmp(const char *str1, const char *str2) is equal to \a str2 or a positive value if \a str1 is greater than \a str2. - Special case 1: Returns 0 if \a str1 and \a str2 are both nullptr. + Special case 1: Returns 0 if \a str1 and \a str2 are both \nullptr. - Special case 2: Returns a random non-zero value if \a str1 is nullptr - or \a str2 is nullptr (but not both). + Special case 2: Returns a random non-zero value if \a str1 is \nullptr + or \a str2 is \nullptr (but not both). \sa qstrcmp(), qstrncmp(), qstricmp(), {8-bit Character Comparisons}, QByteArray::compare() @@ -523,7 +523,7 @@ int qstrnicmp(const char *str1, const char *str2, uint len) A helper for QByteArray::compare. Compares \a len1 bytes from \a str1 to \a len2 bytes from \a str2. If \a len2 is -1, then \a str2 is expected to be - null-terminated. + '\\0'-terminated. */ int qstrnicmp(const char *str1, qsizetype len1, const char *str2, qsizetype len2) { @@ -1281,7 +1281,7 @@ QByteArray qUncompress(const uchar* data, int nbytes) Assigns \a other to this byte array and returns a reference to this byte array. */ -QByteArray &QByteArray::operator=(const QByteArray & other) Q_DECL_NOTHROW +QByteArray &QByteArray::operator=(const QByteArray & other) noexcept { other.d->ref.ref(); if (!d->ref.deref()) @@ -1765,9 +1765,10 @@ void QByteArray::chop(int n) If \a data is 0, a null byte array is constructed. - If \a size is negative, \a data is assumed to point to a nul-terminated - string and its length is determined dynamically. The terminating - nul-character is not considered part of the byte array. + If \a size is negative, \a data is assumed to point to a + '\\0'-terminated string and its length is determined dynamically. + The terminating \\0 character is not considered part of the + byte array. QByteArray makes a deep copy of the string data. @@ -1924,7 +1925,7 @@ void QByteArray::expand(int i) /*! \internal - Return a QByteArray that is sure to be NUL-terminated. + Return a QByteArray that is sure to be '\\0'-terminated. By default, all QByteArray have an extra NUL at the end, guaranteeing that assumption. However, if QByteArray::fromRawData @@ -2336,8 +2337,8 @@ QByteArray &QByteArray::replace(int pos, int len, const QByteArray &after) \overload - Replaces \a len bytes from index position \a pos with the zero terminated - string \a after. + Replaces \a len bytes from index position \a pos with the + '\\0'-terminated string \a after. Notice: this can change the length of the byte array. */ @@ -2415,7 +2416,7 @@ QByteArray &QByteArray::replace(const char *c, const QByteArray &after) Replaces every occurrence of the string \a before with the string \a after. Since the sizes of the strings are given by \a bsize and \a asize, they - may contain zero characters and do not need to be zero-terminated. + may contain zero characters and do not need to be '\\0'-terminated. */ QByteArray &QByteArray::replace(const char *before, int bsize, const char *after, int asize) @@ -2655,10 +2656,7 @@ QList<QByteArray> QByteArray::split(char sep) const Example: - \code - QByteArray ba("ab"); - ba.repeated(4); // returns "abababab" - \endcode + \snippet code/src_corelib_tools_qbytearray.cpp 49 */ QByteArray QByteArray::repeated(int times) const { @@ -3079,7 +3077,7 @@ bool QByteArray::endsWith(const char *str) const return qstrncmp(d->data() + d->size - len, str, len) == 0; } -/*! +/* Returns true if \a c is an uppercase Latin1 letter. \note The multiplication sign 0xD7 and the sz ligature 0xDF are not treated as uppercase Latin1. @@ -3115,7 +3113,7 @@ bool QByteArray::isUpper() const return true; } -/*! +/* Returns true if \a c is an lowercase Latin1 letter. \note The division sign 0xF7 is not treated as lowercase Latin1, but the small y dieresis 0xFF is. @@ -3284,10 +3282,10 @@ static QByteArray toCase_template(T &input, const uchar * table) } if (firstBad == e) - return qMove(input); + return std::move(input); // transform the rest - QByteArray s = qMove(input); // will copy if T is const QByteArray + QByteArray s = std::move(input); // will copy if T is const QByteArray char *b = s.begin(); // will detach if necessary char *p = b + (firstBad - orig_begin); e = b + s.size(); @@ -3915,7 +3913,7 @@ T toIntegral_helper(const char *data, bool *ok, int base) Returns 0 if the conversion fails. - If \a ok is not \c nullptr, failure is reported by setting *\a{ok} + If \a ok is not \nullptr, failure is reported by setting *\a{ok} to \c false, and success by setting *\a{ok} to \c true. \note The conversion of the number is performed in the default C locale, @@ -3941,7 +3939,7 @@ qlonglong QByteArray::toLongLong(bool *ok, int base) const Returns 0 if the conversion fails. - If \a ok is not \c nullptr, failure is reported by setting *\a{ok} + If \a ok is not \nullptr, failure is reported by setting *\a{ok} to \c false, and success by setting *\a{ok} to \c true. \note The conversion of the number is performed in the default C locale, @@ -3966,7 +3964,7 @@ qulonglong QByteArray::toULongLong(bool *ok, int base) const Returns 0 if the conversion fails. - If \a ok is not \c nullptr, failure is reported by setting *\a{ok} + If \a ok is not \nullptr, failure is reported by setting *\a{ok} to \c false, and success by setting *\a{ok} to \c true. \snippet code/src_corelib_tools_qbytearray.cpp 36 @@ -3993,7 +3991,7 @@ int QByteArray::toInt(bool *ok, int base) const Returns 0 if the conversion fails. - If \a ok is not \c nullptr, failure is reported by setting *\a{ok} + If \a ok is not \nullptr, failure is reported by setting *\a{ok} to \c false, and success by setting *\a{ok} to \c true. \note The conversion of the number is performed in the default C locale, @@ -4020,7 +4018,7 @@ uint QByteArray::toUInt(bool *ok, int base) const Returns 0 if the conversion fails. - If \a ok is not \c nullptr, failure is reported by setting *\a{ok} + If \a ok is not \nullptr, failure is reported by setting *\a{ok} to \c false, and success by setting *\a{ok} to \c true. \snippet code/src_corelib_tools_qbytearray.cpp 37 @@ -4048,7 +4046,7 @@ long QByteArray::toLong(bool *ok, int base) const Returns 0 if the conversion fails. - If \a ok is not \c nullptr, failure is reported by setting *\a{ok} + If \a ok is not \nullptr, failure is reported by setting *\a{ok} to \c false, and success by setting *\a{ok} to \c true. \note The conversion of the number is performed in the default C locale, @@ -4072,7 +4070,7 @@ ulong QByteArray::toULong(bool *ok, int base) const Returns 0 if the conversion fails. - If \a ok is not \c nullptr, failure is reported by setting *\a{ok} + If \a ok is not \nullptr, failure is reported by setting *\a{ok} to \c false, and success by setting *\a{ok} to \c true. \note The conversion of the number is performed in the default C locale, @@ -4097,7 +4095,7 @@ short QByteArray::toShort(bool *ok, int base) const Returns 0 if the conversion fails. - If \a ok is not \c nullptr, failure is reported by setting *\a{ok} + If \a ok is not \nullptr, failure is reported by setting *\a{ok} to \c false, and success by setting *\a{ok} to \c true. \note The conversion of the number is performed in the default C locale, @@ -4115,9 +4113,10 @@ ushort QByteArray::toUShort(bool *ok, int base) const /*! Returns the byte array converted to a \c double value. - Returns 0.0 if the conversion fails. + Returns an infinity if the conversion overflows or 0.0 if the + conversion fails for other reasons (e.g. underflow). - If \a ok is not \c nullptr, failure is reported by setting *\a{ok} + If \a ok is not \nullptr, failure is reported by setting *\a{ok} to \c false, and success by setting *\a{ok} to \c true. \snippet code/src_corelib_tools_qbytearray.cpp 38 @@ -4137,10 +4136,9 @@ ushort QByteArray::toUShort(bool *ok, int base) const double QByteArray::toDouble(bool *ok) const { - QByteArray nulled = nulTerminated(); bool nonNullOk = false; int processed = 0; - double d = qt_asciiToDouble(nulled.constData(), nulled.length(), + double d = qt_asciiToDouble(constData(), size(), nonNullOk, processed, WhitespacesAllowed); if (ok) *ok = nonNullOk; @@ -4150,9 +4148,10 @@ double QByteArray::toDouble(bool *ok) const /*! Returns the byte array converted to a \c float value. - Returns 0.0 if the conversion fails. + Returns an infinity if the conversion overflows or 0.0 if the + conversion fails for other reasons (e.g. underflow). - If \a ok is not \c nullptr, failure is reported by setting *\a{ok} + If \a ok is not \nullptr, failure is reported by setting *\a{ok} to \c false, and success by setting *\a{ok} to \c true. \snippet code/src_corelib_tools_qbytearray.cpp 38float @@ -4542,7 +4541,7 @@ QByteArray QByteArray::number(double n, char f, int prec) \snippet code/src_corelib_tools_qbytearray.cpp 43 \warning A byte array created with fromRawData() is \e not - null-terminated, unless the raw data contains a 0 character at + '\\0'-terminated, unless the raw data contains a 0 character at position \a size. While that does not matter for QDataStream or functions like indexOf(), passing the byte array to a function accepting a \c{const char *} expected to be '\\0'-terminated will @@ -4730,11 +4729,7 @@ QByteArray QByteArray::toHex() const If \a separator is not '\0', the separator character is inserted between the hex bytes. Example: - \code - QByteArray macAddress = QByteArray::fromHex("123456abcdef"); - macAddress.toHex(':'); // returns "12:34:56:ab:cd:ef" - macAddress.toHex(0); // returns "123456abcdef" - \endcode + \snippet code/src_corelib_tools_qbytearray.cpp 50 \sa fromHex() */ @@ -4810,10 +4805,7 @@ void q_fromPercentEncoding(QByteArray *ba) another (for instance, '_' or '='). For example: - \code - QByteArray text = QByteArray::fromPercentEncoding("Qt%20is%20great%33"); - text.data(); // returns "Qt is great!" - \endcode + \snippet code/src_corelib_tools_qbytearray.cpp 51 \note Given invalid input (such as a string containing the sequence "%G5", which is not a valid hexadecimal number) the output will be invalid as @@ -4935,12 +4927,7 @@ void q_normalizePercentEncoding(QByteArray *ba, const char *exclude) Example: - \code - QByteArray text = "{a fishy string?}"; - QByteArray ba = text.toPercentEncoding("{}", "s"); - qDebug(ba.constData()); - // prints "{a fi%73hy %73tring%3F}" - \endcode + \snippet code/src_corelib_tools_qbytearray.cpp 52 The hex encoding uses the numbers 0-9 and the uppercase letters A-F. @@ -5058,9 +5045,7 @@ QByteArray QByteArray::toPercentEncoding(const QByteArray &exclude, const QByteA For instance: - \code - QByteArray ba = QByteArrayLiteral("byte array contents"); - \endcode + \snippet code/src_corelib_tools_qbytearray.cpp 53 Using QByteArrayLiteral instead of a double quoted plain C++ string literal can significantly speed up creation of QByteArray instances from data known |