// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

// Defines constants, etc. to be used with the |kIoctlTerminal| ioctl.
//
// TODO(vtl): Add constants for indices?

[DartPackage="mojo_services"]
module mojo.files;

// For:
//   Ioctl(kIoctlTerminal, array<uint32>? in_values)
//       => (Error error, array<uint32>? out_values);
//
// A file that is *not* terminal-like should always respond with error
// |UNIMPLEMENTED| (|out_values| is then undefined). The following applies to
// files that *are* terminal-like.
//
// If |in_values| is null or empty, the response should be |OK| (|out_values| is
// undefined). Thus |Ioctl(kIoctlTerminal, null)| can be used as a test for "is
// a terminal".
//
// Otherwise, |in_values[0]| should be one of "subrequest" values described
// below. (Subrequest values unknown to the implementation should be responded
// to with error |UNIMPLEMENTED|.)
//
// Unless otherwise specified, nothing in |in_values| is required. Unless
// otherwise specified, the presence of extra values beyond those specified (if
// any) should result in error |INVALID_ARGUMENT|. In contrast, extra values in
// |out_values| beyond those specified should be ignored.

// Invalid subrequest. The response should error |UNIMPLEMENTED|.
const uint32 kIoctlTerminalInvalid = 0;

// Get terminal ("termios") settings subrequest. On |OK|:
//   * |out_values[0]| is "iflag" (input mode flags);
//   * |out_values[1]| is "oflag" (output mode flags);
//   * |out_values[2]| is "cflag" (control mode flags);
//   * |out_values[3]| is "lflag" (local mode flags);
//   * |out_values[4]| is "ispeed" (input speed; 0 if unavailable);
//   * |out_values[5]| is "ospeed" (output speed; 1 if unavailable);
//   * |out_values[6..]| are "cc" (control/special characters -- there may be
//     any number of these).
// Constants for the flags, etc. are defined further below.
const uint32 kIoctlTerminalGetSettings = 1;

// Set terminal ("termios") settings subrequest. |in_values[1..6]| should be
// like |out_values[0..5]| for |kIoctlTerminalGetSettings|, and |in_values[7..]|
// should be like |out_values[6..]| (any missing "cc" values are left
// untouched and unknown/extra "cc" values are ignored).
const uint32 kIoctlTerminalSetSettings = 2;

// Get terminal "window" size subrequest. |out_values[0..1]| should be the
// number of rows and columns, respectively. This may also result in error
// |UNAVAILABLE| (and no |out_values|), if the size is not available for
// whatever reason.
// TODO(vtl): This is unlike the Linux/POSIX ioctl, I think, which will just use
// a previous/default value.
const uint32 kIoctlTerminalGetWindowSize = 3;

// Set terminal "window" size subrequest. |in_values[1..2]| should be the
// requested number of rows and and columns, respectively. If the error is |OK|
// or |OUT_OF_RANGE|, |out_values[0..1]| should be the actual set number of rows
// and columns (if |OK| these should be the same as the requested values; on
// other errors, |out_values| is undefined).
const uint32 kIoctlTerminalSetWindowSize = 4;

// Constants for "termios" fields ----------------------------------------------

// Number of base/nonoptional fields:
const uint32 kIoctlTerminalTermiosBaseFieldCount = 6;

// Indices for the base fields:
const uint32 kIoctlTerminalTermiosIFlagIndex  = 0;
const uint32 kIoctlTerminalTermiosOFlagIndex  = 1;
const uint32 kIoctlTerminalTermiosCFlagIndex  = 2;
const uint32 kIoctlTerminalTermiosLFlagIndex  = 3;
const uint32 kIoctlTerminalTermiosISpeedIndex = 4;
const uint32 kIoctlTerminalTermiosOSpeedIndex = 5;

// Current number of "cc" fields:
const uint32 kIoctlTerminalTermiosCtrlCharCount = 17;

// "cc" field indices:
// Note: Not all of these may be available.
const uint32 kIoctlTerminalTermiosCtrlCharVINTRIndex    = 17;
const uint32 kIoctlTerminalTermiosCtrlCharVQUITIndex    = 18;
const uint32 kIoctlTerminalTermiosCtrlCharVERASEIndex   = 19;
const uint32 kIoctlTerminalTermiosCtrlCharVKILLIndex    = 20;
const uint32 kIoctlTerminalTermiosCtrlCharVEOFIndex     = 21;
const uint32 kIoctlTerminalTermiosCtrlCharVTIMEIndex    = 22;
const uint32 kIoctlTerminalTermiosCtrlCharVMINIndex     = 23;
const uint32 kIoctlTerminalTermiosCtrlCharVSWTCIndex    = 24;
const uint32 kIoctlTerminalTermiosCtrlCharVSTARTIndex   = 25;
const uint32 kIoctlTerminalTermiosCtrlCharVSTOPIndex    = 26;
const uint32 kIoctlTerminalTermiosCtrlCharVSUSPIndex    = 27;
const uint32 kIoctlTerminalTermiosCtrlCharVEOLIndex     = 28;
const uint32 kIoctlTerminalTermiosCtrlCharVREPRINTIndex = 29;
const uint32 kIoctlTerminalTermiosCtrlCharVDISCARDIndex = 30;
const uint32 kIoctlTerminalTermiosCtrlCharVWERASEIndex  = 31;
const uint32 kIoctlTerminalTermiosCtrlCharVLNEXTIndex   = 32;
const uint32 kIoctlTerminalTermiosCtrlCharVEOL2Index    = 33;

// "iflag" flag values:
const uint32 kIoctlTerminalTermiosIFlagIGNBRK  = 0x0001;
const uint32 kIoctlTerminalTermiosIFlagBRKINT  = 0x0002;
const uint32 kIoctlTerminalTermiosIFlagIGNPAR  = 0x0004;
const uint32 kIoctlTerminalTermiosIFlagPARMRK  = 0x0008;
const uint32 kIoctlTerminalTermiosIFlagINPCK   = 0x0010;
const uint32 kIoctlTerminalTermiosIFlagISTRIP  = 0x0020;
const uint32 kIoctlTerminalTermiosIFlagINLCR   = 0x0040;
const uint32 kIoctlTerminalTermiosIFlagIGNCR   = 0x0080;
const uint32 kIoctlTerminalTermiosIFlagICRNL   = 0x0100;
const uint32 kIoctlTerminalTermiosIFlagIUCLC   = 0x0200;
const uint32 kIoctlTerminalTermiosIFlagIXON    = 0x0400;
const uint32 kIoctlTerminalTermiosIFlagIXANY   = 0x0800;
const uint32 kIoctlTerminalTermiosIFlagIXOFF   = 0x1000;
const uint32 kIoctlTerminalTermiosIFlagIMAXBEL = 0x2000;
const uint32 kIoctlTerminalTermiosIFlagIUTF8   = 0x4000;

// "oflag" flag values:
const uint32 kIoctlTerminalTermiosOFlagOPOST  = 0x0001;
const uint32 kIoctlTerminalTermiosOFlagOLCUC  = 0x0002;
const uint32 kIoctlTerminalTermiosOFlagONLCR  = 0x0004;
const uint32 kIoctlTerminalTermiosOFlagOCRNL  = 0x0008;
const uint32 kIoctlTerminalTermiosOFlagONOCR  = 0x0010;
const uint32 kIoctlTerminalTermiosOFlagONLRET = 0x0020;
const uint32 kIoctlTerminalTermiosOFlagOFILL  = 0x0040;
const uint32 kIoctlTerminalTermiosOFlagOFDEL  = 0x0080;

const uint32 kIoctlTerminalTermiosOFlagNLDLY  = 0x0100;  // Mask.
const uint32 kIoctlTerminalTermiosOFlagNL0    = 0x0000;
const uint32 kIoctlTerminalTermiosOFlagNL1    = 0x0100;

const uint32 kIoctlTerminalTermiosOFlagCRDLY  = 0x0600;  // Mask.
const uint32 kIoctlTerminalTermiosOFlagCR0    = 0x0000;
const uint32 kIoctlTerminalTermiosOFlagCR1    = 0x0200;
const uint32 kIoctlTerminalTermiosOFlagCR2    = 0x0400;
const uint32 kIoctlTerminalTermiosOFlagCR3    = 0x0600;

const uint32 kIoctlTerminalTermiosOFlagTABDLY = 0x1800;  // Mask.
const uint32 kIoctlTerminalTermiosOFlagTAB0   = 0x0000;
const uint32 kIoctlTerminalTermiosOFlagTAB1   = 0x0800;
const uint32 kIoctlTerminalTermiosOFlagTAB2   = 0x1000;
const uint32 kIoctlTerminalTermiosOFlagTAB3   = 0x1800;

const uint32 kIoctlTerminalTermiosOFlagBSDLY  = 0x2000;  // Mask.
const uint32 kIoctlTerminalTermiosOFlagBS0    = 0x0000;
const uint32 kIoctlTerminalTermiosOFlagBS1    = 0x2000;

const uint32 kIoctlTerminalTermiosOFlagVTDLY  = 0x4000;  // Mask.
const uint32 kIoctlTerminalTermiosOFlagVT0    = 0x0000;
const uint32 kIoctlTerminalTermiosOFlagVT1    = 0x4000;

const uint32 kIoctlTerminalTermiosOFlagFFDLY  = 0x8000;  // Mask.
const uint32 kIoctlTerminalTermiosOFlagFF0    = 0x0000;
const uint32 kIoctlTerminalTermiosOFlagFF1    = 0x8000;

// "cflag" flag values:
// Note: We don't have "CBAUD" in our "cflag".
const uint32 kIoctlTerminalTermiosCFlagCSIZE  = 0x0003;  // Mask.
const uint32 kIoctlTerminalTermiosCFlagCS5    = 0x0000;
const uint32 kIoctlTerminalTermiosCFlagCS6    = 0x0001;
const uint32 kIoctlTerminalTermiosCFlagCS7    = 0x0002;
const uint32 kIoctlTerminalTermiosCFlagCS8    = 0x0003;

const uint32 kIoctlTerminalTermiosCFlagCSTOPB = 0x0004;
const uint32 kIoctlTerminalTermiosCFlagCREAD  = 0x0008;
const uint32 kIoctlTerminalTermiosCFlagPARENB = 0x0010;
const uint32 kIoctlTerminalTermiosCFlagPARODD = 0x0020;
const uint32 kIoctlTerminalTermiosCFlagHUPCL  = 0x0040;
const uint32 kIoctlTerminalTermiosCFlagCLOCAL = 0x0080;

// "lflag" flag values:
const uint32 kIoctlTerminalTermiosLFlagISIG   = 0x0001;
const uint32 kIoctlTerminalTermiosLFlagICANON = 0x0002;
const uint32 kIoctlTerminalTermiosLFlagXCASE  = 0x0004;
const uint32 kIoctlTerminalTermiosLFlagECHO   = 0x0008;
const uint32 kIoctlTerminalTermiosLFlagECHOE  = 0x0010;
const uint32 kIoctlTerminalTermiosLFlagECHOK  = 0x0020;
const uint32 kIoctlTerminalTermiosLFlagECHONL = 0x0040;
const uint32 kIoctlTerminalTermiosLFlagNOFLSH = 0x0080;
const uint32 kIoctlTerminalTermiosLFlagTOSTOP = 0x0100;