+++ /dev/null
-/** @file\r
- Canonical Interactive Input Function.\r
-\r
- The functions assume that isatty() is TRUE at the time they are called.\r
-\r
- Copyright (c) 2012 - 2014, Intel Corporation. All rights reserved.<BR>\r
- This program and the accompanying materials are licensed and made available\r
- under the terms and conditions of the BSD License which accompanies this\r
- distribution. The full text of the license may be found at\r
- http://opensource.org/licenses/bsd-license.php.\r
-\r
- THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
- WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
-**/\r
-#include <Uefi.h>\r
-\r
-#include <LibConfig.h>\r
-\r
-#include <errno.h>\r
-#include <sys/syslimits.h>\r
-#include <sys/termios.h>\r
-#include <Device/IIO.h>\r
-#include <MainData.h>\r
-#include "IIOutilities.h"\r
-#include "IIOechoCtrl.h"\r
-\r
-/** Read a line from the input file in canonical mode.\r
- Perform echoing and input processing as directed by the termios flags.\r
-\r
- @param[in] filp A pointer to a file descriptor structure.\r
-\r
- @return The number of characters in the input buffer, or -1 if there\r
- was an error.\r
-**/\r
-ssize_t\r
-IIO_CanonRead (\r
- struct __filedes *filp\r
- )\r
-{\r
- cIIO *This;\r
- cFIFO *InBuf;\r
- struct termios *Termio;\r
- struct __filedes *fpOut;\r
- size_t NumRead;\r
- wint_t InChar;\r
- tcflag_t IFlag;\r
- tcflag_t LFlag;\r
- BOOLEAN EchoIsOK;\r
- BOOLEAN Activate;\r
- BOOLEAN FirstRead;\r
- int OutMode;\r
- UINTN MaxColumn;\r
- UINTN MaxRow;\r
-\r
- NumRead = MAX_INPUT; // Workaround "potentially uninitialized" warning\r
- EchoIsOK = FALSE;\r
- FirstRead = TRUE;\r
- This = filp->devdata;\r
- Termio = &This->Termio;\r
- InBuf = This->InBuf;\r
-\r
- // Get a copy of the flags we are going to use\r
- IFlag = Termio->c_iflag;\r
- LFlag = Termio->c_lflag;\r
-\r
- /* Determine what the current screen size is. Also validates the output device. */\r
- OutMode = IIO_GetOutputSize(STDOUT_FILENO, &MaxColumn, &MaxRow);\r
- if(OutMode >= 0) {\r
- /* Set the maximum screen dimensions. */\r
- This->MaxColumn = MaxColumn;\r
- This->MaxRow = MaxRow;\r
-\r
- /* Record where the cursor is at the beginning of this Input operation.\r
- The currently set stdout device is used to determine this. If there is\r
- no stdout, or stdout is not an interactive device, nothing is recorded.\r
- */\r
- if (IIO_GetCursorPosition(STDOUT_FILENO, &This->InitialXY.Column, &This->InitialXY.Row) >= 0) {\r
- This->CurrentXY.Column = This->InitialXY.Column;\r
- This->CurrentXY.Row = This->InitialXY.Row;\r
- EchoIsOK = TRUE; // Can only echo to stdout\r
- }\r
- }\r
-\r
- // For now, we only echo to stdout.\r
- fpOut = &gMD->fdarray[STDOUT_FILENO];\r
-\r
- // Input and process characters until BufferSize is exhausted.\r
- do {\r
- InChar = IIO_GetInChar(filp, FirstRead);\r
- if (InChar == WEOF) {\r
- NumRead = 0;\r
- break;\r
- }\r
- FirstRead = FALSE;\r
- Activate = TRUE;\r
- if(InChar == CHAR_CARRIAGE_RETURN) {\r
- if((IFlag & IGNCR) != 0) {\r
- continue; // Restart the do loop, discarding the CR\r
- }\r
- else if((IFlag & ICRNL) != 0) {\r
- InChar = L'\n';\r
- }\r
- }\r
- else if(InChar == CHAR_LINEFEED) {\r
- if((IFlag & INLCR) != 0) {\r
- InChar = L'\r';\r
- }\r
- }\r
- else if(CCEQ(Termio->c_cc[VINTR], InChar)) {\r
- if((LFlag & ISIG) != 0) {\r
- // Raise Signal\r
- // Flush Input Buffer\r
- // Return to caller\r
- InChar = IIO_ECHO_DISCARD;\r
- errno = EINTR;\r
- }\r
- else {\r
- Activate = FALSE;\r
- }\r
- }\r
- else if(CCEQ(Termio->c_cc[VQUIT], InChar)) {\r
- if((LFlag & ISIG) != 0) {\r
- // Raise Signal\r
- // Flush Input Buffer\r
- // Return to caller\r
- InChar = IIO_ECHO_DISCARD;\r
- errno = EINTR;\r
- }\r
- else {\r
- Activate = FALSE;\r
- }\r
- }\r
- else if(CCEQ(Termio->c_cc[VEOF], InChar)) {\r
- InChar = WEOF;\r
- NumRead = 0;\r
- EchoIsOK = FALSE; // Buffer, but don't echo this character\r
- }\r
- else if(CCEQ(Termio->c_cc[VEOL], InChar)) {\r
- EchoIsOK = FALSE; // Buffer, but don't echo this character\r
- }\r
- else if(CCEQ(Termio->c_cc[VERASE], InChar)) {\r
- InChar = IIO_ECHO_ERASE;\r
- Activate = FALSE;\r
- }\r
- else if(CCEQ(Termio->c_cc[VKILL], InChar)) {\r
- InChar = IIO_ECHO_KILL;\r
- Activate = FALSE;\r
- }\r
- else {\r
- if((InChar < TtySpecKeyMin) || (InChar >= TtyFunKeyMax)) {\r
- Activate = FALSE;\r
- }\r
- }\r
- /** The Echo function is responsible for:\r
- * Adding the character to the input buffer, if appropriate.\r
- * Removing characters from the input buffer for ERASE and KILL processing.\r
- * Visually removing characters from the screen if ECHOE is set.\r
- * Ensuring one can not backspace beyond the beginning of the input text.\r
- * Sending final echo strings to output.\r
- **/\r
- (void)This->Echo(fpOut, (wchar_t)InChar, EchoIsOK);\r
- NumRead = InBuf->Count(InBuf, AsElements);\r
- } while((NumRead < MAX_INPUT) &&\r
- (Activate == FALSE));\r
-\r
- return (ssize_t)NumRead;\r
-}\r
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