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+++ b/symbian-qemu-0.9.1-12/python-2.6.1/Doc/library/msvcrt.rst	Fri Jul 31 15:01:17 2009 +0100
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+
+:mod:`msvcrt` -- Useful routines from the MS VC++ runtime
+=========================================================
+
+.. module:: msvcrt
+   :platform: Windows
+   :synopsis: Miscellaneous useful routines from the MS VC++ runtime.
+.. sectionauthor:: Fred L. Drake, Jr. <fdrake@acm.org>
+
+
+These functions provide access to some useful capabilities on Windows platforms.
+Some higher-level modules use these functions to build the  Windows
+implementations of their services.  For example, the :mod:`getpass` module uses
+this in the implementation of the :func:`getpass` function.
+
+Further documentation on these functions can be found in the Platform API
+documentation.
+
+The module implements both the normal and wide char variants of the console I/O
+api. The normal API deals only with ASCII characters and is of limited use
+for internationalized applications. The wide char API should be used where 
+ever possible
+
+.. _msvcrt-files:
+
+File Operations
+---------------
+
+
+.. function:: locking(fd, mode, nbytes)
+
+   Lock part of a file based on file descriptor *fd* from the C runtime.  Raises
+   :exc:`IOError` on failure.  The locked region of the file extends from the
+   current file position for *nbytes* bytes, and may continue beyond the end of the
+   file.  *mode* must be one of the :const:`LK_\*` constants listed below. Multiple
+   regions in a file may be locked at the same time, but may not overlap.  Adjacent
+   regions are not merged; they must be unlocked individually.
+
+
+.. data:: LK_LOCK
+          LK_RLCK
+
+   Locks the specified bytes. If the bytes cannot be locked, the program
+   immediately tries again after 1 second.  If, after 10 attempts, the bytes cannot
+   be locked, :exc:`IOError` is raised.
+
+
+.. data:: LK_NBLCK
+          LK_NBRLCK
+
+   Locks the specified bytes. If the bytes cannot be locked, :exc:`IOError` is
+   raised.
+
+
+.. data:: LK_UNLCK
+
+   Unlocks the specified bytes, which must have been previously locked.
+
+
+.. function:: setmode(fd, flags)
+
+   Set the line-end translation mode for the file descriptor *fd*. To set it to
+   text mode, *flags* should be :const:`os.O_TEXT`; for binary, it should be
+   :const:`os.O_BINARY`.
+
+
+.. function:: open_osfhandle(handle, flags)
+
+   Create a C runtime file descriptor from the file handle *handle*.  The *flags*
+   parameter should be a bitwise OR of :const:`os.O_APPEND`, :const:`os.O_RDONLY`,
+   and :const:`os.O_TEXT`.  The returned file descriptor may be used as a parameter
+   to :func:`os.fdopen` to create a file object.
+
+
+.. function:: get_osfhandle(fd)
+
+   Return the file handle for the file descriptor *fd*.  Raises :exc:`IOError` if
+   *fd* is not recognized.
+
+
+.. _msvcrt-console:
+
+Console I/O
+-----------
+
+
+.. function:: kbhit()
+
+   Return true if a keypress is waiting to be read.
+
+
+.. function:: getch()
+
+   Read a keypress and return the resulting character.  Nothing is echoed to the
+   console.  This call will block if a keypress is not already available, but will
+   not wait for :kbd:`Enter` to be pressed. If the pressed key was a special
+   function key, this will return ``'\000'`` or ``'\xe0'``; the next call will
+   return the keycode.  The :kbd:`Control-C` keypress cannot be read with this
+   function.
+
+   
+.. function:: getwch()
+
+   Wide char variant of :func:`getch`, returning a Unicode value.
+   
+   .. versionadded:: 2.6
+   
+
+.. function:: getche()
+
+   Similar to :func:`getch`, but the keypress will be echoed if it  represents a
+   printable character.
+
+
+.. function:: getwche()
+
+   Wide char variant of :func:`getche`, returning a Unicode value.
+   
+   .. versionadded:: 2.6
+
+
+.. function:: putch(char)
+
+   Print the character *char* to the console without buffering.
+
+   
+.. function:: putwch(unicode_char)
+
+   Wide char variant of :func:`putch`, accepting a Unicode value.
+   
+   .. versionadded:: 2.6
+   
+
+.. function:: ungetch(char)
+
+   Cause the character *char* to be "pushed back" into the console buffer; it will
+   be the next character read by :func:`getch` or :func:`getche`.
+
+   
+.. function:: ungetwch(unicode_char)
+
+   Wide char variant of :func:`ungetch`, accepting a Unicode value.
+   
+   .. versionadded:: 2.6
+
+
+.. _msvcrt-other:
+
+Other Functions
+---------------
+
+
+.. function:: heapmin()
+
+   Force the :cfunc:`malloc` heap to clean itself up and return unused blocks to
+   the operating system.  This only works on Windows NT.  On failure, this raises
+   :exc:`IOError`.
+