The following members of class QByteArray are deprecated. They are provided to keep old source code working. We strongly advise against using them in new code.
(deprecated in 6.4) qsizetype |
count() const |
(deprecated) int |
qsnprintf(char *str, int n, const char *fmt, ...) |
(deprecated) int |
qvsnprintf(char *str, int n, const char *fmt, va_list ap) |
(since 6.2, deprecated in 6.8) QByteArray |
operator""_qba(const char *str, int size) |
[noexcept, deprecated in 6.4] qsizetype QByteArray::count() constThis function is deprecated since 6.4. We strongly advise against using it in new code.
Use size() or length() instead.
This is an overloaded function.
Same as size().
[deprecated] int qsnprintf(char *str,
int n, const char *fmt, ...)This function is deprecated. We strongly advise against using it in new code.
Use C++11's std::snprintf() from <cstdio> instead.
A portable snprintf() function, calls qvsnprintf.
fmt is the printf() format string. The result is put into str, which is a buffer of at least n bytes.
Warning: Call this function only when you know what you are doing since it shows different behavior on certain platforms. Use QString::asprintf() to format a string instead.
See also qvsnprintf() and QString::asprintf().
[deprecated] int qvsnprintf(char *str,
int n, const char *fmt, va_list ap)This function is deprecated. We strongly advise against using it in new code.
Use C++11's std::vsnprintf() from <cstdio> instead.
A portable vsnprintf() function. Will call ::vsnprintf(), ::_vsnprintf(), or ::vsnprintf_s depending on the
system, or fall back to an internal version.
fmt is the printf() format string. The result is put into str, which is a buffer of at least n bytes.
The caller is responsible to call va_end() on ap.
Warning: Since vsnprintf() shows different behavior on certain platforms, you should not rely on the return value or on the fact that you will always get a 0 terminated string back. There are also differences in how
%a (hex floats) and %ls (wide strings) are handled on WebAssembly and Android.
Ideally, you should never call this function but use QString::asprintf() instead.
See also qsnprintf() and QString::asprintf().
[noexcept, since 6.2, deprecated in 6.8] QByteArray
operator""_qba(const char *str, int size)This function is deprecated since 6.8. We strongly advise against using it in new code.
Use _ba from Qt::StringLiterals namespace instead.
Literal operator that creates a QByteArray out of the first size characters in the char string literal str.
The QByteArray is created at compile time, and the generated string data is stored in the read-only segment of the compiled object file. Duplicate literals may share the same read-only memory. This functionality is interchangeable with QByteArrayLiteral, but saves typing when many string literals are present in the code.
The following code creates a QByteArray:
auto str = "hello"_qba;
This function was introduced in Qt 6.2.
See also QByteArrayLiteral and QtLiterals::operator""_qs(const char16_t *str, size_t size).
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