Console.cpp

   1 /* Cycript - The Truly Universal Scripting Language
   2  * Copyright (C) 2009-2016  Jay Freeman (saurik)
   3 */
   4
   5 /* GNU Affero General Public License, Version 3 {{{ */
   6 /*
   7  * This program is free software: you can redistribute it and/or modify
   8  * it under the terms of the GNU Affero General Public License as published by
   9  * the Free Software Foundation, either version 3 of the License, or
  10  * (at your option) any later version.
  11
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU Affero General Public License for more details.
  16
  17  * You should have received a copy of the GNU Affero General Public License
  18  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19 **/
  20 /* }}} */
  21
  22 #include "cycript.hpp"
  23
  24 #ifdef CY_EXECUTE
  25 #include "JavaScript.hpp"
  26 #endif
  27
  28 #include <cstdio>
  29 #include <complex>
  30 #include <fstream>
  31 #include <sstream>
  32
  33 #ifdef HAVE_READLINE_H
  34 #include <readline.h>
  35 #else
  36 #include <readline/readline.h>
  37 #endif
  38
  39 #ifdef HAVE_HISTORY_H
  40 #include <history.h>
  41 #else
  42 #include <readline/history.h>
  43 #endif
  44
  45 #include <errno.h>
  46 #include <getopt.h>
  47 #include <setjmp.h>
  48 #include <signal.h>
  49 #include <unistd.h>
  50
  51 #include <sys/socket.h>
  52 #include <sys/types.h>
  53 #include <sys/stat.h>
  54 #include <fcntl.h>
  55 #include <netdb.h>
  56
  57 #include <sys/ioctl.h>
  58 #include <sys/types.h>
  59 #include <sys/socket.h>
  60 #include <netinet/in.h>
  61 #include <sys/un.h>
  62
  63 #include <dlfcn.h>
  64 #include <pwd.h>
  65 #include <term.h>
  66
  67 #ifdef __APPLE__
  68 #include <mach/mach_time.h>
  69 #endif
  70
  71 #include "Code.hpp"
  72 #include "Driver.hpp"
  73 #include "Error.hpp"
  74 #include "Highlight.hpp"
  75 #include "Syntax.hpp"
  76
  77 extern "C" int rl_display_fixed;
  78 extern "C" int _rl_vis_botlin;
  79 extern "C" int _rl_last_c_pos;
  80 extern "C" int _rl_last_v_pos;
  81
  82 typedef std::complex<int> CYCursor;
  83
  84 static CYCursor current_;
  85 static int width_;
  86 static size_t point_;
  87
  88 unsigned CYDisplayWidth() {
  89     struct winsize info;
  90     if (ioctl(1, TIOCGWINSZ, &info) != -1)
  91         return info.ws_col;
  92     return tgetnum(const_cast<char *>("co"));
  93 }
  94
  95 void CYDisplayOutput_(bool display, const char *&data) {
  96     for (;; ++data) {
  97         char next(*data);
  98         if (next == '\0' || next == CYIgnoreEnd)
  99             return;
 100         if (display)
 101             putchar(next);
 102     }
 103 }
 104
 105 CYCursor CYDisplayOutput(bool display, int width, const char *data, ssize_t offset = 0) {
 106     CYCursor point(current_);
 107
 108     for (;;) {
 109         if (offset-- == 0)
 110             point = current_;
 111         switch (char next = *data++) {
 112             case '\0':
 113                 return point;
 114             break;
 115
 116             case CYIgnoreStart:
 117                 CYDisplayOutput_(display, data);
 118             case CYIgnoreEnd:
 119                 ++offset;
 120             break;
 121
 122             default:
 123                 if (display)
 124                     putchar(next);
 125                 current_ += CYCursor(0, 1);
 126                 if (current_.imag() != width)
 127                     break;
 128                 current_ = CYCursor(current_.real() + 1, 0);
 129                 if (display)
 130                     putp(clr_eos);
 131             break;
 132
 133             case '\n':
 134                 current_ = CYCursor(current_.real() + 1, 4);
 135                 if (display) {
 136                     putp(clr_eol);
 137                     putchar('\n');
 138                     putchar(' ');
 139                     putchar(' ');
 140                     putchar(' ');
 141                     putchar(' ');
 142                 }
 143             break;
 144
 145         }
 146     }
 147 }
 148
 149 void CYDisplayMove_(char *negative, char *positive, int offset) {
 150     if (offset < 0)
 151         putp(tparm(negative, -offset));
 152     else if (offset > 0)
 153         putp(tparm(positive, offset));
 154 }
 155
 156 void CYDisplayMove(CYCursor target) {
 157     CYCursor offset(target - current_);
 158
 159     CYDisplayMove_(parm_up_cursor, parm_down_cursor, offset.real());
 160
 161     if (char *parm = tparm(column_address, target.imag()))
 162         putp(parm);
 163     else
 164         CYDisplayMove_(parm_left_cursor, parm_right_cursor, offset.imag());
 165
 166     current_ = target;
 167 }
 168
 169 void CYDisplayUpdate() {
 170     current_ = CYCursor(_rl_last_v_pos, _rl_last_c_pos);
 171
 172     const char *prompt(rl_display_prompt);
 173
 174     std::ostringstream stream;
 175     CYLexerHighlight(rl_line_buffer, rl_end, stream, true);
 176     std::string string(stream.str());
 177     const char *buffer(string.c_str());
 178
 179     int width(CYDisplayWidth());
 180     if (width_ != width) {
 181         current_ = CYCursor();
 182         CYDisplayOutput(false, width, prompt);
 183         current_ = CYDisplayOutput(false, width, buffer, point_);
 184     }
 185
 186     CYDisplayMove(CYCursor());
 187     CYDisplayOutput(true, width, prompt);
 188     CYCursor target(CYDisplayOutput(true, width, stream.str().c_str(), rl_point));
 189
 190     _rl_vis_botlin = current_.real();
 191
 192     if (current_.imag() == 0)
 193         CYDisplayOutput(true, width, " ");
 194     putp(clr_eos);
 195
 196     CYDisplayMove(target);
 197     fflush(stdout);
 198
 199     _rl_last_v_pos = current_.real();
 200     _rl_last_c_pos = current_.imag();
 201
 202     width_ = width;
 203     point_ = rl_point;
 204 }
 205
 206 static volatile enum {
 207     Working,
 208     Parsing,
 209     Running,
 210     Sending,
 211     Waiting,
 212 } mode_;
 213
 214 static jmp_buf ctrlc_;
 215
 216 static void sigint(int) {
 217     switch (mode_) {
 218         case Working:
 219             return;
 220         case Parsing:
 221             longjmp(ctrlc_, 1);
 222         case Running:
 223 #ifndef __ANDROID__
 224             CYCancel();
 225 #endif
 226             return;
 227         case Sending:
 228             return;
 229         case Waiting:
 230             return;
 231     }
 232 }
 233
 234 static bool bison_;
 235 static bool timing_;
 236 static bool strict_;
 237 static bool pretty_;
 238
 239 void Setup(CYDriver &driver) {
 240     if (bison_)
 241         driver.debug_ = 1;
 242     if (strict_)
 243         driver.strict_ = true;
 244 }
 245
 246 void Setup(CYOutput &out, CYDriver &driver, CYOptions &options, bool lower) {
 247     out.pretty_ = pretty_;
 248     if (lower)
 249         driver.Replace(options);
 250 }
 251
 252 class CYRemote {
 253   public:
 254     virtual CYUTF8String Run(CYPool &pool, CYUTF8String code) = 0;
 255
 256     inline CYUTF8String Run(CYPool &pool, const std::string &code) {
 257         return Run(pool, CYUTF8String(code.c_str(), code.size()));
 258     }
 259 };
 260
 261 class CYLocalRemote :
 262     public CYRemote
 263 {
 264   public:
 265     virtual CYUTF8String Run(CYPool &pool, CYUTF8String code) {
 266         const char *json;
 267         uint32_t size;
 268
 269         mode_ = Running;
 270 #ifdef CY_EXECUTE
 271         json = CYExecute(CYGetJSContext(), pool, code);
 272 #else
 273         json = NULL;
 274 #endif
 275         mode_ = Working;
 276         if (json == NULL)
 277             size = 0;
 278         else
 279             size = strlen(json);
 280
 281         return CYUTF8String(json, size);
 282     }
 283 };
 284
 285 class CYSocketRemote :
 286     public CYRemote
 287 {
 288   private:
 289     int socket_;
 290
 291   public:
 292     CYSocketRemote(const char *host, const char *port) {
 293         struct addrinfo hints;
 294         memset(&hints, 0, sizeof(hints));
 295         hints.ai_family = AF_UNSPEC;
 296         hints.ai_socktype = SOCK_STREAM;
 297         hints.ai_protocol = 0;
 298         hints.ai_flags = 0;
 299
 300         struct addrinfo *infos;
 301         _syscall(getaddrinfo(host, port, &hints, &infos));
 302
 303         _assert(infos != NULL); try {
 304             for (struct addrinfo *info(infos); info != NULL; info = info->ai_next) {
 305                 socket_ = _syscall(socket(info->ai_family, info->ai_socktype, info->ai_protocol)); try {
 306                     _syscall(connect(socket_, info->ai_addr, info->ai_addrlen));
 307                     break;
 308                 } catch (...) {
 309                     _syscall(close(socket_));
 310                     throw;
 311                 }
 312             }
 313         } catch (...) {
 314             freeaddrinfo(infos);
 315             throw;
 316         }
 317     }
 318
 319     virtual CYUTF8String Run(CYPool &pool, CYUTF8String code) {
 320         const char *json;
 321         uint32_t size;
 322
 323         mode_ = Sending;
 324         size = code.size;
 325         _assert(CYSendAll(socket_, &size, sizeof(size)));
 326         _assert(CYSendAll(socket_, code.data, code.size));
 327         mode_ = Waiting;
 328         _assert(CYRecvAll(socket_, &size, sizeof(size)));
 329         if (size == _not(uint32_t)) {
 330             size = 0;
 331             json = NULL;
 332         } else {
 333             char *temp(new(pool) char[size + 1]);
 334             _assert(CYRecvAll(socket_, temp, size));
 335             temp[size] = '\0';
 336             json = temp;
 337         }
 338         mode_ = Working;
 339
 340         return CYUTF8String(json, size);
 341     }
 342 };
 343
 344 void InjectLibrary(pid_t, std::ostream &stream, int, const char *const []);
 345
 346 #ifdef CY_ATTACH
 347 class CYInjectRemote :
 348     public CYRemote
 349 {
 350   private:
 351     int pid_;
 352
 353   public:
 354     CYInjectRemote(int pid) :
 355         pid_(pid)
 356     {
 357         // XXX: wait
 358     }
 359
 360     virtual CYUTF8String Run(CYPool &pool, CYUTF8String code) {
 361         std::ostringstream stream;
 362         const char *args[2] = {"-e", code.data};
 363         InjectLibrary(pid_, stream, 2, args);
 364         std::string json(stream.str());
 365         if (!json.empty() && json[json.size() - 1] == '\n')
 366             json.resize(json.size() - 1);
 367         return CYUTF8String(strdup(json.c_str()), json.size());
 368     }
 369 };
 370 #endif
 371
 372 static std::ostream *out_;
 373
 374 static void Output(CYUTF8String json, std::ostream *out, bool reparse = false) {
 375     CYPool pool;
 376
 377     if (reparse) do {
 378         CYStream stream(json.data, json.data + json.size);
 379         CYDriver driver(pool, stream);
 380         if (driver.Parse(CYMarkExpression))
 381             break;
 382         std::stringbuf str;
 383         CYOptions options;
 384         CYOutput out(str, options);
 385         out.pretty_ = true;
 386         out << *driver.context_;
 387         std::string data(str.str());
 388         json = CYPoolUTF8String(pool, data);
 389         if (json.size == 0)
 390             json.data = NULL;
 391     } while (false);
 392
 393     const char *data(json.data);
 394     size_t size(json.size);
 395
 396     if (size == 0 || out == NULL)
 397         return;
 398
 399     CYLexerHighlight(data, size, *out);
 400     *out << std::endl;
 401 }
 402
 403 int (*append_history$)(int, const char *);
 404
 405 static std::string command_;
 406
 407 static CYRemote *remote_;
 408
 409 static CYUTF8String Run(CYPool &pool, const std::string &code) {
 410     return remote_->Run(pool, code);
 411 }
 412
 413 static char **Complete(const char *word, int start, int end) {
 414     rl_attempted_completion_over = ~0;
 415     std::string line(rl_line_buffer, start);
 416     char **values(CYComplete(word, command_ + line, &Run));
 417     mode_ = Parsing;
 418     return values;
 419 }
 420
 421 // need char *, not const char *
 422 static char name_[] = "cycript";
 423 static char break_[] = " \t\n\"\\'`@><=;|&{(" ")}" ".:[]";
 424
 425 class History {
 426   private:
 427     std::string histfile_;
 428     size_t histlines_;
 429
 430   public:
 431     History(std::string histfile) :
 432         histfile_(histfile),
 433         histlines_(0)
 434     {
 435         read_history(histfile_.c_str());
 436
 437         for (HIST_ENTRY *history((history_set_pos(0), current_history())); history; history = next_history())
 438             for (char *character(history->line); *character; ++character)
 439                 if (*character == '\x01') *character = '\n';
 440     }
 441
 442     ~History() { try {
 443         for (HIST_ENTRY *history((history_set_pos(0), current_history())); history; history = next_history())
 444             for (char *character(history->line); *character; ++character)
 445                 if (*character == '\n') *character = '\x01';
 446
 447         if (append_history$ != NULL) {
 448             int fd(_syscall(open(histfile_.c_str(), O_CREAT | O_WRONLY, 0600)));
 449             _syscall(close(fd));
 450             _assert((*append_history$)(histlines_, histfile_.c_str()) == 0);
 451         } else {
 452             _assert(write_history(histfile_.c_str()) == 0);
 453         }
 454     } catch (const CYException &error) {
 455         CYPool pool;
 456         std::cout << error.PoolCString(pool) << std::endl;
 457     } }
 458
 459     void operator +=(std::string command) {
 460         if (HIST_ENTRY *entry = history_get(where_history()))
 461             if (command == entry->line)
 462                 return;
 463         add_history(command.c_str());
 464         ++histlines_;
 465     }
 466 };
 467
 468 template <typename Type_>
 469 static Type_ *CYmemrchr(Type_ *data, Type_ value, size_t size) {
 470     while (size != 0)
 471         if (data[--size] == value)
 472             return data + size;
 473     return NULL;
 474 }
 475
 476 static void _lblcall(int (*command)(int, int), int count, int key) {
 477     int last(_rl_last_c_pos);
 478     // rl_rubout crashes in _rl_erase_at_end_of_line if _rl_last_c_pos != 0
 479     if (command == &rl_rubout)
 480         _rl_last_c_pos = 0;
 481     for (int i(0); i != count; ++i)
 482         if (command(1, key) != 0)
 483             _assert(false);
 484     _rl_last_c_pos = last;
 485 }
 486
 487 static int CYConsoleKeyReturn(int count, int key) {
 488     if (rl_point != rl_end) {
 489         if (memchr(rl_line_buffer, '\n', rl_end) == NULL) {
 490             _lblcall(&rl_newline, count, key);
 491             return 0;
 492         }
 493
 494       insert:
 495         char *before(CYmemrchr(rl_line_buffer, '\n', rl_point));
 496         if (before == NULL)
 497             before = rl_line_buffer;
 498
 499         int space(before + 1 - rl_line_buffer);
 500         while (space != rl_point && rl_line_buffer[space] == ' ')
 501             ++space;
 502
 503         int adjust(rl_line_buffer + space - 1 - before);
 504         if (space == rl_point && adjust != 0)
 505             _lblcall(&rl_rubout, adjust, '\b');
 506
 507         _lblcall(&rl_insert, count, '\n');
 508         if (adjust != 0)
 509             _lblcall(&rl_insert, adjust, ' ');
 510
 511         return 0;
 512     }
 513
 514     bool done(false);
 515     if (rl_line_buffer[0] == '?')
 516         done = true;
 517     else {
 518         std::string command(rl_line_buffer, rl_end);
 519         command += '\n';
 520         std::stringbuf stream(command);
 521
 522         size_t last(std::string::npos);
 523         for (size_t i(0); i != std::string::npos; i = command.find('\n', i + 1))
 524             ++last;
 525
 526         CYPool pool;
 527         CYDriver driver(pool, stream);
 528         if (driver.Parse() || !driver.errors_.empty())
 529             for (CYDriver::Errors::const_iterator error(driver.errors_.begin()); error != driver.errors_.end(); ++error) {
 530                 if (error->location_.begin.line != last + 1)
 531                     done = true;
 532                 break;
 533             }
 534         else
 535             done = true;
 536     }
 537
 538     if (done) {
 539         _lblcall(&rl_newline, count, key);
 540         return 0;
 541     }
 542
 543     // XXX: this was the most obvious fix, but is seriously dumb
 544     goto insert;
 545 }
 546
 547 static int CYConsoleKeyUp(int count, int key) {
 548     for (; count != 0; --count) {
 549         char *after(CYmemrchr(rl_line_buffer, '\n', rl_point));
 550         if (after == NULL) {
 551             if (int value = rl_get_previous_history(1, key))
 552                 return value;
 553             continue;
 554         }
 555
 556         char *before(CYmemrchr(rl_line_buffer, '\n', after - rl_line_buffer));
 557         if (before == NULL)
 558             before = rl_line_buffer - 1;
 559
 560         ptrdiff_t offset(rl_line_buffer + rl_point - after);
 561         if (offset > after - before)
 562             rl_point = after - rl_line_buffer;
 563         else
 564             rl_point = before + offset - rl_line_buffer;
 565     }
 566
 567     return 0;
 568 }
 569
 570 static int CYConsoleKeyDown(int count, int key) {
 571     for (; count != 0; --count) {
 572         char *after(static_cast<char *>(memchr(rl_line_buffer + rl_point, '\n', rl_end - rl_point)));
 573         if (after == NULL) {
 574             int where(where_history());
 575             if (int value = rl_get_next_history(1, key))
 576                 return value;
 577             if (where != where_history()) {
 578                 char *first(static_cast<char *>(memchr(rl_line_buffer, '\n', rl_end)));
 579                 if (first != NULL)
 580                     rl_point = first - 1 - rl_line_buffer;
 581             }
 582             continue;
 583         }
 584
 585         char *before(CYmemrchr(rl_line_buffer, '\n', rl_point));
 586         if (before == NULL)
 587             before = rl_line_buffer - 1;
 588
 589         char *next(static_cast<char *>(memchr(after + 1, '\n', rl_line_buffer + rl_end - after - 1)));
 590         if (next == NULL)
 591             next = rl_line_buffer + rl_end;
 592
 593         ptrdiff_t offset(rl_line_buffer + rl_point - before);
 594         if (offset > next - after)
 595             rl_point = next - rl_line_buffer;
 596         else
 597             rl_point = after + offset - rl_line_buffer;
 598     }
 599
 600     return 0;
 601 }
 602
 603 static int CYConsoleLineBegin(int count, int key) {
 604     while (rl_point != 0 && rl_line_buffer[rl_point - 1] != '\n')
 605         --rl_point;
 606     return 0;
 607 }
 608
 609 static int CYConsoleLineEnd(int count, int key) {
 610     while (rl_point != rl_end && rl_line_buffer[rl_point] != '\n')
 611         ++rl_point;
 612     if (rl_point != rl_end && rl_editing_mode == 0)
 613         --rl_point;
 614     return 0;
 615 }
 616
 617 static int CYConsoleKeyBack(int count, int key) {
 618     for (; count != 0; --count) {
 619         if (rl_point == 0)
 620             return 1;
 621
 622         char *before(CYmemrchr(rl_line_buffer, '\n', rl_point));
 623         if (before == NULL) {
 624             int adjust(std::min(count, rl_point));
 625             _lblcall(&rl_rubout, adjust, key);
 626             count -= adjust - 1;
 627             continue;
 628         }
 629
 630         int start(before + 1 - rl_line_buffer);
 631         if (start == rl_point) rubout: {
 632             _lblcall(&rl_rubout, 1, key);
 633             continue;
 634         }
 635
 636         for (int i(start); i != rl_point; ++i)
 637             if (rl_line_buffer[i] != ' ')
 638                 goto rubout;
 639         _lblcall(&rl_rubout, (rl_point - start) % 4 ?: 4, key);
 640     }
 641
 642     return 0;
 643 }
 644
 645 static int CYConsoleKeyTab(int count, int key) {
 646     char *before(CYmemrchr(rl_line_buffer, '\n', rl_point));
 647     if (before == NULL) complete:
 648         return rl_complete_internal(rl_completion_mode(&CYConsoleKeyTab));
 649     int start(before + 1 - rl_line_buffer);
 650     for (int i(start); i != rl_point; ++i)
 651         if (rl_line_buffer[i] != ' ')
 652             goto complete;
 653     _lblcall(&rl_insert, 4 - (rl_point - start) % 4, ' ');
 654     return 0;
 655 }
 656
 657 static void CYConsoleRemapBind(Keymap map, rl_command_func_t *from, rl_command_func_t *to) {
 658     char **keyseqs(rl_invoking_keyseqs_in_map(from, map));
 659     if (keyseqs == NULL)
 660         return;
 661     for (char **keyseq(keyseqs); *keyseq != NULL; ++keyseq) {
 662         rl_bind_keyseq_in_map(*keyseq, to, map);
 663         free(*keyseq);
 664     }
 665     free(keyseqs);
 666 }
 667
 668 static void CYConsoleRemapKeys(Keymap map) {
 669     CYConsoleRemapBind(map, &rl_beg_of_line, &CYConsoleLineBegin);
 670     CYConsoleRemapBind(map, &rl_end_of_line, &CYConsoleLineEnd);
 671
 672     CYConsoleRemapBind(map, &rl_get_previous_history, &CYConsoleKeyUp);
 673     CYConsoleRemapBind(map, &rl_get_next_history, &CYConsoleKeyDown);
 674
 675     CYConsoleRemapBind(map, &rl_rubout, &CYConsoleKeyBack);
 676     CYConsoleRemapBind(map, &rl_complete, &CYConsoleKeyTab);
 677 }
 678
 679 static void CYConsolePrepTerm(int meta) {
 680     rl_prep_terminal(meta);
 681
 682     CYConsoleRemapKeys(emacs_standard_keymap);
 683     CYConsoleRemapKeys(emacs_meta_keymap);
 684     CYConsoleRemapKeys(emacs_ctlx_keymap);
 685     CYConsoleRemapKeys(vi_insertion_keymap);
 686     CYConsoleRemapKeys(vi_movement_keymap);
 687 }
 688
 689 static void CYOutputRun(const std::string &code, bool reparse = false) {
 690     CYPool pool;
 691     Output(Run(pool, code), &std::cout, reparse);
 692 }
 693
 694 static void Console(CYOptions &options) {
 695     std::string basedir;
 696 #ifdef __ANDROID__
 697     basedir = "/data/local/tmp";
 698 #else
 699     if (const char *home = getenv("HOME"))
 700         basedir = home;
 701     else {
 702         passwd *passwd;
 703         if (const char *username = getenv("LOGNAME"))
 704             passwd = getpwnam(username);
 705         else
 706             passwd = getpwuid(getuid());
 707         basedir = passwd->pw_dir;
 708     }
 709 #endif
 710
 711     basedir += "/.cycript";
 712     mkdir(basedir.c_str(), 0700);
 713
 714     rl_initialize();
 715     rl_readline_name = name_;
 716
 717     History history(basedir + "/history");
 718
 719     bool bypass(false);
 720     bool debug(false);
 721     bool lower(true);
 722     bool reparse(false);
 723
 724     out_ = &std::cout;
 725
 726     rl_completer_word_break_characters = break_;
 727     rl_attempted_completion_function = &Complete;
 728
 729     if (cur_term != NULL) {
 730         rl_redisplay_function = CYDisplayUpdate;
 731         rl_prep_term_function = CYConsolePrepTerm;
 732     }
 733
 734     CYOutputRun("");
 735
 736     for (;;) {
 737         struct sigaction action;
 738         sigemptyset(&action.sa_mask);
 739         action.sa_handler = &sigint;
 740         action.sa_flags = 0;
 741         sigaction(SIGINT, &action, NULL);
 742
 743         if (setjmp(ctrlc_) != 0) {
 744             mode_ = Working;
 745             *out_ << std::endl;
 746             continue;
 747         }
 748
 749         if (bypass) {
 750             rl_bind_key('\r', &rl_newline);
 751             rl_bind_key('\n', &rl_newline);
 752         } else {
 753             rl_bind_key('\r', &CYConsoleKeyReturn);
 754             rl_bind_key('\n', &CYConsoleKeyReturn);
 755         }
 756
 757         mode_ = Parsing;
 758         char *line(readline("cy# "));
 759         mode_ = Working;
 760
 761         if (line == NULL) {
 762             *out_ << std::endl;
 763             break;
 764         }
 765
 766         std::string command(line);
 767         free(line);
 768         if (command.empty())
 769             continue;
 770         history += command;
 771
 772         if (command[0] == '?') {
 773             std::string data(command.substr(1));
 774             if (data == "bypass") {
 775                 bypass = !bypass;
 776                 *out_ << "bypass == " << (bypass ? "true" : "false") << std::endl;
 777             } else if (data == "debug") {
 778                 debug = !debug;
 779                 *out_ << "debug == " << (debug ? "true" : "false") << std::endl;
 780             } else if (data == "destroy") {
 781                 CYDestroyContext();
 782             } else if (data == "gc") {
 783                 *out_ << "collecting... " << std::flush;
 784                 CYGarbageCollect(CYGetJSContext());
 785                 *out_ << "done." << std::endl;
 786             } else if (data == "exit") {
 787                 return;
 788             } else if (data == "lower") {
 789                 lower = !lower;
 790                 *out_ << "lower == " << (lower ? "true" : "false") << std::endl;
 791             } else if (data == "reparse") {
 792                 reparse = !reparse;
 793                 *out_ << "reparse == " << (reparse ? "true" : "false") << std::endl;
 794             }
 795
 796             continue;
 797         }
 798
 799         std::string code;
 800         if (bypass)
 801             code = command;
 802         else try {
 803             std::stringbuf stream(command);
 804
 805             CYPool pool;
 806             CYDriver driver(pool, stream);
 807             Setup(driver);
 808
 809             if (driver.Parse() || !driver.errors_.empty()) {
 810                 for (CYDriver::Errors::const_iterator error(driver.errors_.begin()); error != driver.errors_.end(); ++error) {
 811                     CYPosition begin(error->location_.begin);
 812                     CYPosition end(error->location_.end);
 813
 814                     /*if (begin.line != lines2.size()) {
 815                         std::cerr << "  | ";
 816                         std::cerr << lines2[begin.line - 1] << std::endl;
 817                     }*/
 818
 819                     std::cerr << "....";
 820                     for (size_t i(0); i != begin.column; ++i)
 821                         std::cerr << '.';
 822                     if (begin.line != end.line || begin.column == end.column)
 823                         std::cerr << '^';
 824                     else for (size_t i(0), e(end.column - begin.column); i != e; ++i)
 825                         std::cerr << '^';
 826                     std::cerr << std::endl;
 827
 828                     std::cerr << "  | ";
 829                     std::cerr << error->message_ << std::endl;
 830
 831                     break;
 832                 }
 833
 834                 continue;
 835             }
 836
 837             if (driver.script_ == NULL)
 838                 continue;
 839
 840             std::stringbuf str;
 841             CYOutput out(str, options);
 842             Setup(out, driver, options, lower);
 843             out << *driver.script_;
 844             code = str.str();
 845         } catch (const CYException &error) {
 846             CYPool pool;
 847             std::cout << error.PoolCString(pool) << std::endl;
 848             continue;
 849         }
 850
 851         if (debug) {
 852             std::cout << "cy= ";
 853             CYLexerHighlight(code.c_str(), code.size(), std::cout);
 854             std::cout << std::endl;
 855         }
 856
 857         CYOutputRun(code, reparse);
 858     }
 859 }
 860
 861 static uint64_t CYGetTime() {
 862 #ifdef __APPLE__
 863     return mach_absolute_time();
 864 #else
 865     struct timespec spec;
 866     clock_gettime(CLOCK_MONOTONIC, &spec);
 867     return spec.tv_sec * UINT64_C(1000000000) + spec.tv_nsec;
 868 #endif
 869 }
 870
 871 int Main(int argc, char * const argv[], char const * const envp[]) {
 872     bool tty(isatty(STDIN_FILENO));
 873     bool compile(false);
 874     bool target(false);
 875     CYOptions options;
 876
 877     append_history$ = (int (*)(int, const char *)) (dlsym(RTLD_DEFAULT, "append_history"));
 878
 879 #ifdef CY_ATTACH
 880     pid_t pid(_not(pid_t));
 881 #endif
 882
 883     const char *host(NULL);
 884     const char *port(NULL);
 885
 886     const char *argv0(argv[0]);
 887
 888     optind = 1;
 889
 890     for (;;) {
 891         int option(getopt_long(argc, argv,
 892             "c"
 893             "g:"
 894             "n:"
 895 #ifdef CY_ATTACH
 896             "p:"
 897 #endif
 898             "r:"
 899             "s"
 900         , (const struct option[]) {
 901             {NULL, no_argument, NULL, 'c'},
 902             {NULL, required_argument, NULL, 'g'},
 903             {NULL, required_argument, NULL, 'n'},
 904 #ifdef CY_ATTACH
 905             {NULL, required_argument, NULL, 'p'},
 906 #endif
 907             {NULL, required_argument, NULL, 'r'},
 908             {NULL, no_argument, NULL, 's'},
 909         {0, 0, 0, 0}}, NULL));
 910
 911         switch (option) {
 912             case -1:
 913                 goto getopt;
 914
 915             case ':':
 916             case '?':
 917                 fprintf(stderr,
 918                     "usage: cycript [-c]"
 919 #ifdef CY_ATTACH
 920                     " [-p <pid|name>]"
 921 #endif
 922                     " [-r <host:port>]"
 923                     " [<script> [<arg>...]]\n"
 924                 );
 925                 return 1;
 926
 927             target:
 928                 if (!target)
 929                     target = true;
 930                 else {
 931                     fprintf(stderr, "only one of -[c"
 932 #ifdef CY_ATTACH
 933                     "p"
 934 #endif
 935                     "r] may be used at a time\n");
 936                     return 1;
 937                 }
 938             break;
 939
 940             case 'c':
 941                 compile = true;
 942             goto target;
 943
 944             case 'g':
 945                 if (false);
 946                 else if (strcmp(optarg, "rename") == 0)
 947                     options.verbose_ = true;
 948                 else if (strcmp(optarg, "bison") == 0)
 949                     bison_ = true;
 950                 else if (strcmp(optarg, "timing") == 0)
 951                     timing_ = true;
 952                 else {
 953                     fprintf(stderr, "invalid name for -g\n");
 954                     return 1;
 955                 }
 956             break;
 957
 958             case 'n':
 959                 if (false);
 960                 else if (strcmp(optarg, "minify") == 0)
 961                     pretty_ = true;
 962                 else {
 963                     fprintf(stderr, "invalid name for -n\n");
 964                     return 1;
 965                 }
 966             break;
 967
 968 #ifdef CY_ATTACH
 969             case 'p': {
 970                 size_t size(strlen(optarg));
 971                 char *end;
 972
 973                 pid = strtoul(optarg, &end, 0);
 974                 if (optarg + size != end) {
 975                     // XXX: arg needs to be escaped in some horrendous way of doom
 976                     // XXX: this is a memory leak now because I just don't care enough
 977                     char *command;
 978                     int writ(asprintf(&command, "ps axc|sed -e '/^ *[0-9]/{s/^ *\\([0-9]*\\)\\( *[^ ]*\\)\\{3\\} *-*\\([^ ]*\\)/\\3 \\1/;/^%s /{s/^[^ ]* //;q;};};d'", optarg));
 979                     _assert(writ != -1);
 980
 981                     if (FILE *pids = popen(command, "r")) {
 982                         char value[32];
 983                         size = 0;
 984
 985                         for (;;) {
 986                             size_t read(fread(value + size, 1, sizeof(value) - size, pids));
 987                             if (read == 0)
 988                                 break;
 989                             else {
 990                                 size += read;
 991                                 if (size == sizeof(value))
 992                                     goto fail;
 993                             }
 994                         }
 995
 996                       size:
 997                         if (size == 0)
 998                             goto fail;
 999                         if (value[size - 1] == '\n') {
1000                             --size;
1001                             goto size;
1002                         }
1003
1004                         value[size] = '\0';
1005                         size = strlen(value);
1006                         pid = strtoul(value, &end, 0);
1007                         if (value + size != end) fail:
1008                             pid = _not(pid_t);
1009                         _syscall(pclose(pids));
1010                     }
1011
1012                     if (pid == _not(pid_t)) {
1013                         fprintf(stderr, "unable to find process `%s' using ps\n", optarg);
1014                         return 1;
1015                     }
1016                 }
1017             } goto target;
1018 #endif
1019
1020             case 'r': {
1021                 //size_t size(strlen(optarg));
1022
1023                 char *colon(strrchr(optarg, ':'));
1024                 if (colon == NULL) {
1025                     fprintf(stderr, "missing colon in hostspec\n");
1026                     return 1;
1027                 }
1028
1029                 /*char *end;
1030                 port = strtoul(colon + 1, &end, 10);
1031                 if (end != optarg + size) {
1032                     fprintf(stderr, "invalid port in hostspec\n");
1033                     return 1;
1034                 }*/
1035
1036                 host = optarg;
1037                 *colon = '\0';
1038                 port = colon + 1;
1039             } goto target;
1040
1041             case 's':
1042                 strict_ = true;
1043             break;
1044
1045             default:
1046                 _assert(false);
1047         }
1048     }
1049
1050   getopt:
1051     argc -= optind;
1052     argv += optind;
1053
1054     const char *script;
1055
1056 #ifdef CY_ATTACH
1057     if (pid != _not(pid_t) && argc > 1) {
1058         fprintf(stderr, "-p cannot set argv\n");
1059         return 1;
1060     }
1061 #endif
1062
1063     if (argc == 0)
1064         script = NULL;
1065     else {
1066         script = argv[0];
1067         if (strcmp(script, "-") == 0)
1068             script = NULL;
1069         --argc;
1070         ++argv;
1071     }
1072
1073 #ifdef CY_EXECUTE
1074     // XXX: const_cast?! wtf gcc :(
1075     CYSetArgs(argv0, script, argc, const_cast<const char **>(argv));
1076 #endif
1077
1078 #ifdef CY_ATTACH
1079     if (remote_ == NULL && pid != _not(pid_t))
1080         remote_ = new CYInjectRemote(pid);
1081 #endif
1082
1083     if (remote_ == NULL && host != NULL && port != NULL)
1084         remote_ = new CYSocketRemote(host, port);
1085
1086     if (remote_ == NULL)
1087         remote_ = new CYLocalRemote();
1088
1089     if (script == NULL && tty)
1090         Console(options);
1091     else {
1092         std::istream *stream;
1093         if (script == NULL) {
1094             stream = &std::cin;
1095             script = "<stdin>";
1096         } else {
1097             stream = new std::fstream(script, std::ios::in | std::ios::binary);
1098             _assert(!stream->fail());
1099         }
1100
1101         if (timing_) {
1102             std::stringbuf buffer;
1103             stream->get(buffer, '\0');
1104             _assert(!stream->fail());
1105
1106             double average(0);
1107             int samples(-50);
1108             uint64_t start(CYGetTime());
1109
1110             for (;;) {
1111                 stream = new std::istringstream(buffer.str());
1112
1113                 CYPool pool;
1114                 CYDriver driver(pool, *stream->rdbuf(), script);
1115                 Setup(driver);
1116
1117                 uint64_t begin(CYGetTime());
1118                 driver.Parse();
1119                 uint64_t end(CYGetTime());
1120
1121                 delete stream;
1122
1123                 average += (end - begin - average) / ++samples;
1124
1125                 uint64_t now(CYGetTime());
1126                 if (samples == 0)
1127                     average = 0;
1128                 else if ((now - start) / 1000000000 >= 1)
1129                     std::cout << std::fixed << average << '\t' << (end - begin) << '\t' << samples << std::endl;
1130                 else continue;
1131
1132                 start = now;
1133             }
1134
1135             stream = new std::istringstream(buffer.str());
1136             std::cin.get();
1137         }
1138
1139         CYPool pool;
1140         CYDriver driver(pool, *stream->rdbuf(), script);
1141         Setup(driver);
1142
1143         bool failed(driver.Parse());
1144
1145         if (failed || !driver.errors_.empty()) {
1146             for (CYDriver::Errors::const_iterator i(driver.errors_.begin()); i != driver.errors_.end(); ++i)
1147                 std::cerr << i->location_.begin << ": " << i->message_ << std::endl;
1148             return 1;
1149         } else if (driver.script_ != NULL) {
1150             std::stringbuf str;
1151             CYOutput out(str, options);
1152             Setup(out, driver, options, true);
1153             out << *driver.script_;
1154             std::string code(str.str());
1155             if (compile)
1156                 std::cout << code;
1157             else {
1158                 CYUTF8String json(Run(pool, code));
1159                 if (CYStartsWith(json, "throw ")) {
1160                     CYLexerHighlight(json.data, json.size, std::cerr);
1161                     std::cerr << std::endl;
1162                     return 1;
1163                 }
1164             }
1165         }
1166     }
1167
1168     return 0;
1169 }
1170
1171 _visible int main(int argc, char * const argv[], char const * const envp[]) {
1172     try {
1173         return Main(argc, argv, envp);
1174     } catch (const CYException &error) {
1175         CYPool pool;
1176         fprintf(stderr, "%s\n", error.PoolCString(pool));
1177         return 1;
1178     }
1179 }