Gecko [ www.foryou-vip.com ]

Name	Size	Permission	Date
abstract.rst	723 B	-rw-r--r--	2024-03-19 22:46
allocation.rst	2.64 KB	-rw-r--r--	2024-03-19 22:46
apiabiversion.rst	2.31 KB	-rw-r--r--	2024-03-19 22:46
arg.rst	30.91 KB	-rw-r--r--	2024-03-19 22:46
bool.rst	1.2 KB	-rw-r--r--	2024-03-19 22:46
buffer.rst	22.47 KB	-rw-r--r--	2024-03-19 22:46
bytearray.rst	2.2 KB	-rw-r--r--	2024-03-19 22:46
bytes.rst	9.24 KB	-rw-r--r--	2024-03-19 22:46
call.rst	16.56 KB	-rw-r--r--	2024-03-19 22:46
capsule.rst	5.68 KB	-rw-r--r--	2024-03-19 22:46
cell.rst	1.94 KB	-rw-r--r--	2024-03-19 22:46
code.rst	2.56 KB	-rw-r--r--	2024-03-19 22:46
codec.rst	5.01 KB	-rw-r--r--	2024-03-19 22:46
complex.rst	4.13 KB	-rw-r--r--	2024-03-19 22:46
concrete.rst	2.03 KB	-rw-r--r--	2024-03-19 22:46
contextvars.rst	4.11 KB	-rw-r--r--	2024-03-19 22:46
conversion.rst	5.39 KB	-rw-r--r--	2024-03-19 22:46
coro.rst	862 B	-rw-r--r--	2024-03-19 22:46
datetime.rst	8.46 KB	-rw-r--r--	2024-03-19 22:46
descriptor.rst	1.08 KB	-rw-r--r--	2024-03-19 22:46
dict.rst	8.51 KB	-rw-r--r--	2024-03-19 22:46
exceptions.rst	49.28 KB	-rw-r--r--	2024-03-19 22:46
file.rst	4.25 KB	-rw-r--r--	2024-03-19 22:46
float.rst	2.27 KB	-rw-r--r--	2024-03-19 22:46
function.rst	3.37 KB	-rw-r--r--	2024-03-19 22:46
gcsupport.rst	8.52 KB	-rw-r--r--	2024-03-19 22:46
gen.rst	1.35 KB	-rw-r--r--	2024-03-19 22:46
import.rst	12.61 KB	-rw-r--r--	2024-03-19 22:46
index.rst	632 B	-rw-r--r--	2024-03-19 22:46
init.rst	69.48 KB	-rw-r--r--	2024-03-19 22:46
init_config.rst	48.17 KB	-rw-r--r--	2024-03-19 22:46
intro.rst	32.23 KB	-rw-r--r--	2024-03-19 22:46
iter.rst	1.98 KB	-rw-r--r--	2024-03-19 22:46
iterator.rst	1.67 KB	-rw-r--r--	2024-03-19 22:46
list.rst	4.61 KB	-rw-r--r--	2024-03-19 22:46
long.rst	10.72 KB	-rw-r--r--	2024-03-19 22:46
mapping.rst	3.47 KB	-rw-r--r--	2024-03-19 22:46
marshal.rst	3.71 KB	-rw-r--r--	2024-03-19 22:46
memory.rst	29.92 KB	-rw-r--r--	2024-03-19 22:46
memoryview.rst	2.32 KB	-rw-r--r--	2024-03-19 22:46
method.rst	2.71 KB	-rw-r--r--	2024-03-19 22:46
module.rst	22.79 KB	-rw-r--r--	2024-03-19 22:46
none.rst	736 B	-rw-r--r--	2024-03-19 22:46
number.rst	10.83 KB	-rw-r--r--	2024-03-19 22:46
objbuffer.rst	2.39 KB	-rw-r--r--	2024-03-19 22:46
object.rst	15.16 KB	-rw-r--r--	2024-03-19 22:46
objimpl.rst	300 B	-rw-r--r--	2024-03-19 22:46
refcounting.rst	4.5 KB	-rw-r--r--	2024-03-19 22:46
reflection.rst	1.96 KB	-rw-r--r--	2024-03-19 22:46
sequence.rst	6.62 KB	-rw-r--r--	2024-03-19 22:46
set.rst	6.22 KB	-rw-r--r--	2024-03-19 22:46
slice.rst	4.47 KB	-rw-r--r--	2024-03-19 22:46
stable.rst	6.44 KB	-rw-r--r--	2024-03-19 22:46
structures.rst	18.59 KB	-rw-r--r--	2024-03-19 22:46
sys.rst	16.48 KB	-rw-r--r--	2024-03-19 22:46
tuple.rst	8.45 KB	-rw-r--r--	2024-03-19 22:46
type.rst	9.86 KB	-rw-r--r--	2024-03-19 22:46
typehints.rst	1.67 KB	-rw-r--r--	2024-03-19 22:46
typeobj.rst	127.01 KB	-rw-r--r--	2024-03-19 22:46
unicode.rst	67.9 KB	-rw-r--r--	2024-03-19 22:46
utilities.rst	410 B	-rw-r--r--	2024-03-19 22:46
veryhigh.rst	15.57 KB	-rw-r--r--	2024-03-19 22:46
weakref.rst	3.03 KB	-rw-r--r--	2024-03-19 22:46

Rename

.. highlight:: c

.. _string-conversion:

String conversion and formatting
================================

Functions for number conversion and formatted string output.

.. c:function:: int PyOS_snprintf(char *str, size_t size,  const char *format, ...)

Output not more than *size* bytes to *str* according to the format string
   *format* and the extra arguments. See the Unix man page :manpage:`snprintf(3)`.

.. c:function:: int PyOS_vsnprintf(char *str, size_t size, const char *format, va_list va)

Output not more than *size* bytes to *str* according to the format string
   *format* and the variable argument list *va*. Unix man page
   :manpage:`vsnprintf(3)`.

:c:func:`PyOS_snprintf` and :c:func:`PyOS_vsnprintf` wrap the Standard C library
functions :c:func:`snprintf` and :c:func:`vsnprintf`. Their purpose is to
guarantee consistent behavior in corner cases, which the Standard C functions do
not.

The wrappers ensure that ``str[size-1]`` is always ``'\0'`` upon return. They
never write more than *size* bytes (including the trailing ``'\0'``) into str.
Both functions require that ``str != NULL``, ``size > 0``, ``format != NULL``
and ``size < INT_MAX``. Note that this means there is no equivalent to the C99
``n = snprintf(NULL, 0, ...)`` which would determine the necessary buffer size.

The return value (*rv*) for these functions should be interpreted as follows:

* When ``0 <= rv < size``, the output conversion was successful and *rv*
  characters were written to *str* (excluding the trailing ``'\0'`` byte at
  ``str[rv]``).

* When ``rv >= size``, the output conversion was truncated and a buffer with
  ``rv + 1`` bytes would have been needed to succeed. ``str[size-1]`` is ``'\0'``
  in this case.

* When ``rv < 0``, "something bad happened." ``str[size-1]`` is ``'\0'`` in
  this case too, but the rest of *str* is undefined. The exact cause of the error
  depends on the underlying platform.

The following functions provide locale-independent string to number conversions.

.. c:function:: double PyOS_string_to_double(const char *s, char **endptr, PyObject *overflow_exception)

Convert a string ``s`` to a :c:expr:`double`, raising a Python
   exception on failure.  The set of accepted strings corresponds to
   the set of strings accepted by Python's :func:`float` constructor,
   except that ``s`` must not have leading or trailing whitespace.
   The conversion is independent of the current locale.

If ``endptr`` is ``NULL``, convert the whole string.  Raise
   :exc:`ValueError` and return ``-1.0`` if the string is not a valid
   representation of a floating-point number.

If endptr is not ``NULL``, convert as much of the string as
   possible and set ``*endptr`` to point to the first unconverted
   character.  If no initial segment of the string is the valid
   representation of a floating-point number, set ``*endptr`` to point
   to the beginning of the string, raise ValueError, and return
   ``-1.0``.

If ``s`` represents a value that is too large to store in a float
   (for example, ``"1e500"`` is such a string on many platforms) then
   if ``overflow_exception`` is ``NULL`` return ``Py_HUGE_VAL`` (with
   an appropriate sign) and don't set any exception.  Otherwise,
   ``overflow_exception`` must point to a Python exception object;
   raise that exception and return ``-1.0``.  In both cases, set
   ``*endptr`` to point to the first character after the converted value.

If any other error occurs during the conversion (for example an
   out-of-memory error), set the appropriate Python exception and
   return ``-1.0``.

.. versionadded:: 3.1

.. c:function:: char* PyOS_double_to_string(double val, char format_code, int precision, int flags, int *ptype)

Convert a :c:expr:`double` *val* to a string using supplied
   *format_code*, *precision*, and *flags*.

*format_code* must be one of ``'e'``, ``'E'``, ``'f'``, ``'F'``,
   ``'g'``, ``'G'`` or ``'r'``.  For ``'r'``, the supplied *precision*
   must be 0 and is ignored.  The ``'r'`` format code specifies the
   standard :func:`repr` format.

*flags* can be zero or more of the values ``Py_DTSF_SIGN``,
   ``Py_DTSF_ADD_DOT_0``, or ``Py_DTSF_ALT``, or-ed together:

* ``Py_DTSF_SIGN`` means to always precede the returned string with a sign
     character, even if *val* is non-negative.

* ``Py_DTSF_ADD_DOT_0`` means to ensure that the returned string will not look
     like an integer.

* ``Py_DTSF_ALT`` means to apply "alternate" formatting rules.  See the
     documentation for the :c:func:`PyOS_snprintf` ``'#'`` specifier for
     details.

If *ptype* is non-``NULL``, then the value it points to will be set to one of
   ``Py_DTST_FINITE``, ``Py_DTST_INFINITE``, or ``Py_DTST_NAN``, signifying that
   *val* is a finite number, an infinite number, or not a number, respectively.

The return value is a pointer to *buffer* with the converted string or
   ``NULL`` if the conversion failed. The caller is responsible for freeing the
   returned string by calling :c:func:`PyMem_Free`.

.. versionadded:: 3.1

.. c:function:: int PyOS_stricmp(const char *s1, const char *s2)

Case insensitive comparison of strings. The function works almost
   identically to :c:func:`strcmp` except that it ignores the case.

.. c:function:: int PyOS_strnicmp(const char *s1, const char *s2, Py_ssize_t  size)

Case insensitive comparison of strings. The function works almost
   identically to :c:func:`strncmp` except that it ignores the case.