sravan/system76-edk2
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

StdLib: Add terminal type line editing (Interactive IO) for console devices.

Browse Source 
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
This commit is contained in:
darylm503
2012-12-11 21:19:14 +00:00
parent e575c101d8
commit 6c6c850ad6
23 changed files with 3404 additions and 218 deletions
Download Patch File Download Diff File Expand all files Collapse all files

89
StdLib/LibC/Uefi/InteractiveIO/NonCanonRead.c Normal file
View File

@@ -0,0 +1,89 @@
/** @file
NonCanonical Interactive Input Function.
The functions assume that isatty() is TRUE at the time they are called.
If _S_IWTTY is set, the device returns WIDE characters.
Copyright (c) 2012, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials are licensed and made available
under the terms and conditions of the BSD License which accompanies this
distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php.
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#include <LibConfig.h>
#include <sys/syslimits.h>
#include <sys/termios.h>
#include <Device/IIO.h>
#include <Containers/Fifo.h>
/** Perform a noncanonical read of input.
@param[in] filp Pointer to a file descriptor structure.
@param[in] BufferSize Maximum number of bytes to return.
@retval -1 An error has occurred. Reason in errno.
@retval -1 No data returned. None was ready.
@retval >0 The number of elements returned
**/
ssize_t
IIO_NonCanonRead (
struct __filedes *filp
)
{
cIIO *This;
cFIFO *InBuf;
struct termios *Termio;
EFI_STATUS Status;
ssize_t NumRead;
cc_t tioMin;
cc_t tioTime;
UINT32 InputType;
wchar_t InChar; // Intermediate character buffer
NumRead = -1;
InChar = 0; // Initialize so compilers don't complain.
This = filp->devdata;
Termio = &This->Termio;
InBuf = This->InBuf;
tioMin = Termio->c_cc[VMIN];
tioTime = Termio->c_cc[VTIME];
if(tioMin >= MAX_INPUT) {
tioMin = MAX_INPUT;
}
/* There are four types of processing that may be done, based on
the values of tioMin and tioTime.
Min Time Type
--- ---- ----
0 0 0 Return buffer contents or 1 new char
0 >0 1 Return 0 or 1 character depending on timeout
>0 0 2 Buffer Min chars. Return BufferSize chars.
>0 >0 3 Return up to Min chars. Unless the inter-byte timer expires.
Currently, only type 0 is implemented.
*/
InputType = 0;
if(tioMin != 0) InputType = 2;
if(tioTime != 0) ++InputType;
//switch(InputType) {
// case 0:
if(InBuf->IsEmpty(InBuf)) {
NumRead = filp->f_ops->fo_read(filp, &filp->f_offset, sizeof(wchar_t), &InChar);
if(NumRead > 0) {
Status = InBuf->Write(InBuf, &InChar, 1); // Buffer the character
}
}
// break;
// case 1:
// break;
// case 2:
// break;
// case 3:
// break;
//}
return NumRead;
}