1 files changed, 544 insertions, 0 deletions
diff --git a/goldfishterm/terminfo.h b/goldfishterm/terminfo.h
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+// Copyright 2021 Benjamin Barenblat
+//
+// Licensed under the Apache License, Version 2.0 (the "License"); you may not
+// use this file except in compliance with the License. You may obtain a copy of
+// the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+// License for the specific language governing permissions and limitations under
+// the License.
+
+// Terminfo entries and the terminfo database.
+
+#ifndef EC_GOLDFISHTERM_TERMINFO_H_
+#define EC_GOLDFISHTERM_TERMINFO_H_
+
+#include <stdint.h>
+
+#include <istream>
+#include <string>
+#include <vector>
+
+#include "third_party/abseil/absl/strings/string_view.h"
+#include "third_party/abseil/absl/types/optional.h"
+
+namespace goldfishterm {
+
+// Boolean terminal capabilities. See terminfo(5) for full documentation.
+enum class BooleanCapability {
+  kAutoLeftMargin = 0,
+  kAutoRightMargin = 1,
+  kNoEscCtlc = 2,
+  kCeolStandoutGlitch = 3,
+  kEatNewlineGlitch = 4,
+  kEraseOverstrike = 5,
+  kGenericType = 6,
+  kHardCopy = 7,
+  kHasMetaKey = 8,
+  kHasStatusLine = 9,
+  kInsertNullGlitch = 10,
+  kMemoryAbove = 11,
+  kMemoryBelow = 12,
+  kMoveInsertMode = 13,
+  kMoveStandoutMode = 14,
+  kOverStrike = 15,
+  kStatusLineEscOk = 16,
+  kDestTabsMagicSmso = 17,
+  kTildeGlitch = 18,
+  kTransparentUnderline = 19,
+  kXonXoff = 20,
+  kNeedsXonXoff = 21,
+  kPrtrSilent = 22,
+  kHardCursor = 23,
+  kNonRevRmcup = 24,
+  kNoPadChar = 25,
+  kNonDestScrollRegion = 26,
+  kCanChange = 27,
+  kBackColorErase = 28,
+  kHueLightnessSaturation = 29,
+  kColAddrGlitch = 30,
+  kCrCancelsMicroMode = 31,
+  kHasPrintWheel = 32,
+  kRowAddrGlitch = 33,
+  kSemiAutoRightMargin = 34,
+  kCpiChangesRes = 35,
+  kLpiChangesRes = 36,
+};
+
+// Numeric terminal capabilities. See terminfo(5) for full documentation.
+enum class NumericCapability {
+  kColumns = 0,
+  kInitTabs = 1,
+  kLines = 2,
+  kLinesOfMemory = 3,
+  kMagicCookieGlitch = 4,
+  kPaddingBaudRate = 5,
+  kVirtualTerminal = 6,
+  kWidthStatusLine = 7,
+  kNumLabels = 8,
+  kLabelHeight = 9,
+  kLabelWidth = 10,
+  kMaxAttributes = 11,
+  kMaximumWindows = 12,
+  kMaxColors = 13,
+  kMaxPairs = 14,
+  kNoColorVideo = 15,
+  kBufferCapacity = 16,
+  kDotVertSpacing = 17,
+  kDotHorzSpacing = 18,
+  kMaxMicroAddress = 19,
+  kMaxMicroJump = 20,
+  kMicroColSize = 21,
+  kMicroLineSize = 22,
+  kNumberOfPins = 23,
+  kOutputResChar = 24,
+  kOutputResLine = 25,
+  kOutputResHorzInch = 26,
+  kOutputResVertInch = 27,
+  kPrintRate = 28,
+  kWideCharSize = 29,
+  kButtons = 30,
+  kBitImageEntwining = 31,
+  kBitImageType = 32,
+};
+
+// String terminal capabilities. See terminfo(5) for full documentation.
+enum class StringCapability {
+  kBackTab = 0,
+  kBell = 1,
+  kCarriageReturn = 2,
+  kChangeScrollRegion = 3,
+  kClearAllTabs = 4,
+  kClearScreen = 5,
+  kClrEol = 6,
+  kClrEos = 7,
+  kColumnAddress = 8,
+  kCommandCharacter = 9,
+  kCursorAddress = 10,
+  kCursorDown = 11,
+  kCursorHome = 12,
+  kCursorInvisible = 13,
+  kCursorLeft = 14,
+  kCursorMemAddress = 15,
+  kCursorNormal = 16,
+  kCursorRight = 17,
+  kCursorToLl = 18,
+  kCursorUp = 19,
+  kCursorVisible = 20,
+  kDeleteCharacter = 21,
+  kDeleteLine = 22,
+  kDisStatusLine = 23,
+  kDownHalfLine = 24,
+  kEnterAltCharsetMode = 25,
+  kEnterBlinkMode = 26,
+  kEnterBoldMode = 27,
+  kEnterCaMode = 28,
+  kEnterDeleteMode = 29,
+  kEnterDimMode = 30,
+  kEnterInsertMode = 31,
+  kEnterSecureMode = 32,
+  kEnterProtectedMode = 33,
+  kEnterReverseMode = 34,
+  kEnterStandoutMode = 35,
+  kEnterUnderlineMode = 36,
+  kEraseChars = 37,
+  kExitAltCharsetMode = 38,
+  kExitAttributeMode = 39,
+  kExitCaMode = 40,
+  kExitDeleteMode = 41,
+  kExitInsertMode = 42,
+  kExitStandoutMode = 43,
+  kExitUnderlineMode = 44,
+  kFlashScreen = 45,
+  kFormFeed = 46,
+  kFromStatusLine = 47,
+  kInit1string = 48,
+  kInit2string = 49,
+  kInit3string = 50,
+  kInitFile = 51,
+  kInsertCharacter = 52,
+  kInsertLine = 53,
+  kInsertPadding = 54,
+  kKeyBackspace = 55,
+  kKeyCatab = 56,
+  kKeyClear = 57,
+  kKeyCtab = 58,
+  kKeyDc = 59,
+  kKeyDl = 60,
+  kKeyDown = 61,
+  kKeyEic = 62,
+  kKeyEol = 63,
+  kKeyEos = 64,
+  kKeyF0 = 65,
+  kKeyF1 = 66,
+  kKeyF10 = 67,
+  kKeyF2 = 68,
+  kKeyF3 = 69,
+  kKeyF4 = 70,
+  kKeyF5 = 71,
+  kKeyF6 = 72,
+  kKeyF7 = 73,
+  kKeyF8 = 74,
+  kKeyF9 = 75,
+  kKeyHome = 76,
+  kKeyIc = 77,
+  kKeyIl = 78,
+  kKeyLeft = 79,
+  kKeyLl = 80,
+  kKeyNpage = 81,
+  kKeyPpage = 82,
+  kKeyRight = 83,
+  kKeySf = 84,
+  kKeySr = 85,
+  kKeyStab = 86,
+  kKeyUp = 87,
+  kKeypadLocal = 88,
+  kKeypadXmit = 89,
+  kLabF0 = 90,
+  kLabF1 = 91,
+  kLabF10 = 92,
+  kLabF2 = 93,
+  kLabF3 = 94,
+  kLabF4 = 95,
+  kLabF5 = 96,
+  kLabF6 = 97,
+  kLabF7 = 98,
+  kLabF8 = 99,
+  kLabF9 = 100,
+  kMetaOff = 101,
+  kMetaOn = 102,
+  kNewline = 103,
+  kPadChar = 104,
+  kParmDch = 105,
+  kParmDeleteLine = 106,
+  kParmDownCursor = 107,
+  kParmIch = 108,
+  kParmIndex = 109,
+  kParmInsertLine = 110,
+  kParmLeftCursor = 111,
+  kParmRightCursor = 112,
+  kParmRindex = 113,
+  kParmUpCursor = 114,
+  kPkeyKey = 115,
+  kPkeyLocal = 116,
+  kPkeyXmit = 117,
+  kPrintScreen = 118,
+  kPrtrOff = 119,
+  kPrtrOn = 120,
+  kRepeatChar = 121,
+  kReset1string = 122,
+  kReset2string = 123,
+  kReset3string = 124,
+  kResetFile = 125,
+  kRestoreCursor = 126,
+  kRowAddress = 127,
+  kSaveCursor = 128,
+  kScrollForward = 129,
+  kScrollReverse = 130,
+  kSetAttributes = 131,
+  kSetTab = 132,
+  kSetWindow = 133,
+  kTab = 134,
+  kToStatusLine = 135,
+  kUnderlineChar = 136,
+  kUpHalfLine = 137,
+  kInitProg = 138,
+  kKeyA1 = 139,
+  kKeyA3 = 140,
+  kKeyB2 = 141,
+  kKeyC1 = 142,
+  kKeyC3 = 143,
+  kPrtrNon = 144,
+  kCharPadding = 145,
+  kAcsChars = 146,
+  kPlabNorm = 147,
+  kKeyBtab = 148,
+  kEnterXonMode = 149,
+  kExitXonMode = 150,
+  kEnterAmMode = 151,
+  kExitAmMode = 152,
+  kXonCharacter = 153,
+  kXoffCharacter = 154,
+  kEnaAcs = 155,
+  kLabelOn = 156,
+  kLabelOff = 157,
+  kKeyBeg = 158,
+  kKeyCancel = 159,
+  kKeyClose = 160,
+  kKeyCommand = 161,
+  kKeyCopy = 162,
+  kKeyCreate = 163,
+  kKeyEnd = 164,
+  kKeyEnter = 165,
+  kKeyExit = 166,
+  kKeyFind = 167,
+  kKeyHelp = 168,
+  kKeyMark = 169,
+  kKeyMessage = 170,
+  kKeyMove = 171,
+  kKeyNext = 172,
+  kKeyOpen = 173,
+  kKeyOptions = 174,
+  kKeyPrevious = 175,
+  kKeyPrint = 176,
+  kKeyRedo = 177,
+  kKeyReference = 178,
+  kKeyRefresh = 179,
+  kKeyReplace = 180,
+  kKeyRestart = 181,
+  kKeyResume = 182,
+  kKeySave = 183,
+  kKeySuspend = 184,
+  kKeyUndo = 185,
+  kKeySbeg = 186,
+  kKeyScancel = 187,
+  kKeyScommand = 188,
+  kKeyScopy = 189,
+  kKeyScreate = 190,
+  kKeySdc = 191,
+  kKeySdl = 192,
+  kKeySelect = 193,
+  kKeySend = 194,
+  kKeySeol = 195,
+  kKeySexit = 196,
+  kKeySfind = 197,
+  kKeyShelp = 198,
+  kKeyShome = 199,
+  kKeySic = 200,
+  kKeySleft = 201,
+  kKeySmessage = 202,
+  kKeySmove = 203,
+  kKeySnext = 204,
+  kKeySoptions = 205,
+  kKeySprevious = 206,
+  kKeySprint = 207,
+  kKeySredo = 208,
+  kKeySreplace = 209,
+  kKeySright = 210,
+  kKeySrsume = 211,
+  kKeySsave = 212,
+  kKeySsuspend = 213,
+  kKeySundo = 214,
+  kReqForInput = 215,
+  kKeyF11 = 216,
+  kKeyF12 = 217,
+  kKeyF13 = 218,
+  kKeyF14 = 219,
+  kKeyF15 = 220,
+  kKeyF16 = 221,
+  kKeyF17 = 222,
+  kKeyF18 = 223,
+  kKeyF19 = 224,
+  kKeyF20 = 225,
+  kKeyF21 = 226,
+  kKeyF22 = 227,
+  kKeyF23 = 228,
+  kKeyF24 = 229,
+  kKeyF25 = 230,
+  kKeyF26 = 231,
+  kKeyF27 = 232,
+  kKeyF28 = 233,
+  kKeyF29 = 234,
+  kKeyF30 = 235,
+  kKeyF31 = 236,
+  kKeyF32 = 237,
+  kKeyF33 = 238,
+  kKeyF34 = 239,
+  kKeyF35 = 240,
+  kKeyF36 = 241,
+  kKeyF37 = 242,
+  kKeyF38 = 243,
+  kKeyF39 = 244,
+  kKeyF40 = 245,
+  kKeyF41 = 246,
+  kKeyF42 = 247,
+  kKeyF43 = 248,
+  kKeyF44 = 249,
+  kKeyF45 = 250,
+  kKeyF46 = 251,
+  kKeyF47 = 252,
+  kKeyF48 = 253,
+  kKeyF49 = 254,
+  kKeyF50 = 255,
+  kKeyF51 = 256,
+  kKeyF52 = 257,
+  kKeyF53 = 258,
+  kKeyF54 = 259,
+  kKeyF55 = 260,
+  kKeyF56 = 261,
+  kKeyF57 = 262,
+  kKeyF58 = 263,
+  kKeyF59 = 264,
+  kKeyF60 = 265,
+  kKeyF61 = 266,
+  kKeyF62 = 267,
+  kKeyF63 = 268,
+  kClrBol = 269,
+  kClearMargins = 270,
+  kSetLeftMargin = 271,
+  kSetRightMargin = 272,
+  kLabelFormat = 273,
+  kSetClock = 274,
+  kDisplayClock = 275,
+  kRemoveClock = 276,
+  kCreateWindow = 277,
+  kGotoWindow = 278,
+  kHangup = 279,
+  kDialPhone = 280,
+  kQuickDial = 281,
+  kTone = 282,
+  kPulse = 283,
+  kFlashHook = 284,
+  kFixedPause = 285,
+  kWaitTone = 286,
+  kUser0 = 287,
+  kUser1 = 288,
+  kUser2 = 289,
+  kUser3 = 290,
+  kUser4 = 291,
+  kUser5 = 292,
+  kUser6 = 293,
+  kUser7 = 294,
+  kUser8 = 295,
+  kUser9 = 296,
+  kOrigPair = 297,
+  kOrigColors = 298,
+  kInitializeColor = 299,
+  kInitializePair = 300,
+  kSetColorPair = 301,
+  kSetForeground = 302,
+  kSetBackground = 303,
+  kChangeCharPitch = 304,
+  kChangeLinePitch = 305,
+  kChangeResHorz = 306,
+  kChangeResVert = 307,
+  kDefineChar = 308,
+  kEnterDoublewideMode = 309,
+  kEnterDraftQuality = 310,
+  kEnterItalicsMode = 311,
+  kEnterLeftwardMode = 312,
+  kEnterMicroMode = 313,
+  kEnterNearLetterQuality = 314,
+  kEnterNormalQuality = 315,
+  kEnterShadowMode = 316,
+  kEnterSubscriptMode = 317,
+  kEnterSuperscriptMode = 318,
+  kEnterUpwardMode = 319,
+  kExitDoublewideMode = 320,
+  kExitItalicsMode = 321,
+  kExitLeftwardMode = 322,
+  kExitMicroMode = 323,
+  kExitShadowMode = 324,
+  kExitSubscriptMode = 325,
+  kExitSuperscriptMode = 326,
+  kExitUpwardMode = 327,
+  kMicroColumnAddress = 328,
+  kMicroDown = 329,
+  kMicroLeft = 330,
+  kMicroRight = 331,
+  kMicroRowAddress = 332,
+  kMicroUp = 333,
+  kOrderOfPins = 334,
+  kParmDownMicro = 335,
+  kParmLeftMicro = 336,
+  kParmRightMicro = 337,
+  kParmUpMicro = 338,
+  kSelectCharSet = 339,
+  kSetBottomMargin = 340,
+  kSetBottomMarginParm = 341,
+  kSetLeftMarginParm = 342,
+  kSetRightMarginParm = 343,
+  kSetTopMargin = 344,
+  kSetTopMarginParm = 345,
+  kStartBitImage = 346,
+  kStartCharSetDef = 347,
+  kStopBitImage = 348,
+  kStopCharSetDef = 349,
+  kSubscriptCharacters = 350,
+  kSuperscriptCharacters = 351,
+  kTheseCauseCr = 352,
+  kZeroMotion = 353,
+  kCharSetNames = 354,
+  kKeyMouse = 355,
+  kMouseInfo = 356,
+  kReqMousePos = 357,
+  kGetMouse = 358,
+  kSetAForeground = 359,
+  kSetABackground = 360,
+  kPkeyPlab = 361,
+  kDeviceType = 362,
+  kCodeSetInit = 363,
+  kSet0DesSeq = 364,
+  kSet1DesSeq = 365,
+  kSet2DesSeq = 366,
+  kSet3DesSeq = 367,
+  kSetLrMargin = 368,
+  kSetTbMargin = 369,
+  kBitImageRepeat = 370,
+  kBitImageNewline = 371,
+  kBitImageCarriageReturn = 372,
+  kColorNames = 373,
+  kDefineBitImageRegion = 374,
+  kEndBitImageRegion = 375,
+  kSetColorBand = 376,
+  kSetPageLength = 377,
+  kDisplayPcChar = 378,
+  kEnterPcCharsetMode = 379,
+  kExitPcCharsetMode = 380,
+  kEnterScancodeMode = 381,
+  kExitScancodeMode = 382,
+  kPcTermOptions = 383,
+  kScancodeEscape = 384,
+  kAltScancodeEsc = 385,
+  kEnterHorizontalHlMode = 386,
+  kEnterLeftHlMode = 387,
+  kEnterLowHlMode = 388,
+  kEnterRightHlMode = 389,
+  kEnterTopHlMode = 390,
+  kEnterVerticalHlMode = 391,
+  kSetAAttributes = 392,
+  kSetPglenInch = 393,
+};
+
+// An entry from the terminfo database.
+//
+// This class is thread-safe.
+class TerminfoEntry final {
+ public:
+  // Looks up a terminfo entry in the system terminfo database. Throws
+  // std::runtime_error if no valid system entry exists for the specified
+  // terminal.
+  //
+  // This function is thread-hostile (it inspects the environment).
+  static TerminfoEntry FromSystemDatabase(absl::string_view terminal_name);
+
+  // Parses an entry from binary data. Throws std::runtime_error if the data are
+  // invalid.
+  explicit TerminfoEntry(std::istream&);
+
+  TerminfoEntry(const TerminfoEntry&) noexcept = default;
+  TerminfoEntry& operator=(const TerminfoEntry&) noexcept = default;
+  TerminfoEntry(TerminfoEntry&&) noexcept = default;
+  TerminfoEntry& operator=(TerminfoEntry&&) noexcept = default;
+
+  const std::string& name() const noexcept { return names_[0]; }
+  const std::vector<std::string>& names() const noexcept { return names_; }
+
+  bool get(BooleanCapability) const noexcept;
+  absl::optional<int> get(NumericCapability) const noexcept;
+  const absl::optional<std::string>& get(StringCapability) const noexcept;
+
+ private:
+  std::vector<std::string> names_;
+  std::vector<int8_t> booleans_;
+  std::vector<int32_t> numbers_;
+  std::vector<absl::optional<std::string>> strings_;
+};
+
+}  // namespace goldfishterm
+
+#endif  // EC_GOLDFISHTERM_TERMINFO_H_