Depending upon termios settings, writing to a terminal device may result in
many more characters being output than were in the buffer provided to the
IIO_Write() function.
IIO_Write() is supposed to return the number of BYTES written, not characters.
Since the provided buffer contains MBCS characters, there can be up to three
bytes per character. Due to the expansion that may occur, "BYTES written"
is interpreted to mean the number of BYTES consumed from the MBCS buffer
provided as a parameter to IIO_Write.
These changes ensure that the correct number of characters are consumed from
the internal Output buffer and the correct number of BYTES consumed from the
buffer parameter are counted and returned.
Update copyright.
Fix some indentation and white space issues.
Improve comments for IIO_Write().
Add debugging instrumentation to count unconsumed data in the Input and Output buffers.
Modify IIO_Write() to:
Accurately count input bytes CONSUMED.
Consume only as many expanded (cooked) characters from the output buffer
as were actually sent to the device.
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Daryl McDaniel <edk2-lists@mc2research.org>
Reviewed-by: Erik Bjorge <erik.c.bjorge@intel.com>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@19589 6f19259b-4bc3-4df7-8a09-765794883524
Adds a subset of the terminal I/O capabilities described in the Single Unix Specification, V4.
Supports:
Erase previous character. Default is Backspace or ^H
Erase line. Default is ^U
TAB characters are supported and, by default, are rendered as 8 spaces. They will still be read as a single TAB character.
Both Canonical and Non-Canonical modes are supported.
If a terminal device is opened with O_TTY_INIT in the mode, the device will be initialized to "sane" values for interactive use. It will be in Canonical mode, Enter will be translated to NewLine and on output, a NewLine is translated to CRLF. Echoing will be on, control characters are output as ^X, and TABs are expanded.
See the new <sys/termios.h> file for more information.
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: daryl.mcdaniel@intel.com
Reviewed-by: erik.c.bjorge@intel.com
Reviewed-by: leroy.p.leahy@intel.com
Reviewed-by: lee.g.rosenbaum@intel.com
Reviewed-by: jaben.carsey@intel.com
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@13989 6f19259b-4bc3-4df7-8a09-765794883524
Daryl McDaniel
darylm503