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 static CYUTF8String Run(CYPool &pool, int client, CYUTF8String code) {
 253     const char *json;
 254     uint32_t size;
 255
 256     if (client == -1) {
 257         mode_ = Running;
 258 #ifdef CY_EXECUTE
 259         json = CYExecute(CYGetJSContext(), pool, code);
 260 #else
 261         json = NULL;
 262 #endif
 263         mode_ = Working;
 264         if (json == NULL)
 265             size = 0;
 266         else
 267             size = strlen(json);
 268     } else {
 269         mode_ = Sending;
 270         size = code.size;
 271         _assert(CYSendAll(client, &size, sizeof(size)));
 272         _assert(CYSendAll(client, code.data, code.size));
 273         mode_ = Waiting;
 274         _assert(CYRecvAll(client, &size, sizeof(size)));
 275         if (size == _not(uint32_t)) {
 276             size = 0;
 277             json = NULL;
 278         } else {
 279             char *temp(new(pool) char[size + 1]);
 280             _assert(CYRecvAll(client, temp, size));
 281             temp[size] = '\0';
 282             json = temp;
 283         }
 284         mode_ = Working;
 285     }
 286
 287     return CYUTF8String(json, size);
 288 }
 289
 290 static CYUTF8String Run(CYPool &pool, int client, const std::string &code) {
 291     return Run(pool, client, CYUTF8String(code.c_str(), code.size()));
 292 }
 293
 294 static std::ostream *out_;
 295
 296 static void Output(CYUTF8String json, std::ostream *out, bool reparse = false) {
 297     CYPool pool;
 298
 299     if (reparse) do {
 300         CYStream stream(json.data, json.data + json.size);
 301         CYDriver driver(pool, stream);
 302         if (driver.Parse(CYMarkExpression))
 303             break;
 304         std::stringbuf str;
 305         CYOptions options;
 306         CYOutput out(str, options);
 307         out.pretty_ = true;
 308         out << *driver.context_;
 309         std::string data(str.str());
 310         json = CYPoolUTF8String(pool, data);
 311         if (json.size == 0)
 312             json.data = NULL;
 313     } while (false);
 314
 315     const char *data(json.data);
 316     size_t size(json.size);
 317
 318     if (data == NULL || out == NULL)
 319         return;
 320
 321     CYLexerHighlight(data, size, *out);
 322     *out << std::endl;
 323 }
 324
 325 int (*append_history$)(int, const char *);
 326
 327 static std::string command_;
 328
 329 static int client_;
 330
 331 static CYUTF8String Run(CYPool &pool, const std::string &code) {
 332     return Run(pool, client_, code);
 333 }
 334
 335 static char **Complete(const char *word, int start, int end) {
 336     rl_attempted_completion_over = ~0;
 337     std::string line(rl_line_buffer, start);
 338     char **values(CYComplete(word, command_ + line, &Run));
 339     mode_ = Parsing;
 340     return values;
 341 }
 342
 343 // need char *, not const char *
 344 static char name_[] = "cycript";
 345 static char break_[] = " \t\n\"\\'`@><=;|&{(" ")}" ".:[]";
 346
 347 class History {
 348   private:
 349     std::string histfile_;
 350     size_t histlines_;
 351
 352   public:
 353     History(std::string histfile) :
 354         histfile_(histfile),
 355         histlines_(0)
 356     {
 357         read_history(histfile_.c_str());
 358
 359         for (HIST_ENTRY *history((history_set_pos(0), current_history())); history; history = next_history())
 360             for (char *character(history->line); *character; ++character)
 361                 if (*character == '\x01') *character = '\n';
 362     }
 363
 364     ~History() { try {
 365         for (HIST_ENTRY *history((history_set_pos(0), current_history())); history; history = next_history())
 366             for (char *character(history->line); *character; ++character)
 367                 if (*character == '\n') *character = '\x01';
 368
 369         if (append_history$ != NULL) {
 370             int fd(_syscall(open(histfile_.c_str(), O_CREAT | O_WRONLY, 0600)));
 371             _syscall(close(fd));
 372             _assert((*append_history$)(histlines_, histfile_.c_str()) == 0);
 373         } else {
 374             _assert(write_history(histfile_.c_str()) == 0);
 375         }
 376     } catch (const CYException &error) {
 377         CYPool pool;
 378         std::cout << error.PoolCString(pool) << std::endl;
 379     } }
 380
 381     void operator +=(std::string command) {
 382         if (HIST_ENTRY *entry = history_get(where_history()))
 383             if (command == entry->line)
 384                 return;
 385         add_history(command.c_str());
 386         ++histlines_;
 387     }
 388 };
 389
 390 template <typename Type_>
 391 static Type_ *CYmemrchr(Type_ *data, Type_ value, size_t size) {
 392     while (size != 0)
 393         if (data[--size] == value)
 394             return data + size;
 395     return NULL;
 396 }
 397
 398 static void _lblcall(int (*command)(int, int), int count, int key) {
 399     int last(_rl_last_c_pos);
 400     // rl_rubout crashes in _rl_erase_at_end_of_line if _rl_last_c_pos != 0
 401     if (command == &rl_rubout)
 402         _rl_last_c_pos = 0;
 403     for (int i(0); i != count; ++i)
 404         if (command(1, key) != 0)
 405             _assert(false);
 406     _rl_last_c_pos = last;
 407 }
 408
 409 static int CYConsoleKeyReturn(int count, int key) {
 410     if (rl_point != rl_end) {
 411         if (memchr(rl_line_buffer, '\n', rl_end) == NULL) {
 412             _lblcall(&rl_newline, count, key);
 413             return 0;
 414         }
 415
 416       insert:
 417         char *before(CYmemrchr(rl_line_buffer, '\n', rl_point));
 418         if (before == NULL)
 419             before = rl_line_buffer;
 420
 421         int space(before + 1 - rl_line_buffer);
 422         while (space != rl_point && rl_line_buffer[space] == ' ')
 423             ++space;
 424
 425         int adjust(rl_line_buffer + space - 1 - before);
 426         if (space == rl_point && adjust != 0)
 427             _lblcall(&rl_rubout, adjust, '\b');
 428
 429         _lblcall(&rl_insert, count, '\n');
 430         if (adjust != 0)
 431             _lblcall(&rl_insert, adjust, ' ');
 432
 433         return 0;
 434     }
 435
 436     bool done(false);
 437     if (rl_line_buffer[0] == '?')
 438         done = true;
 439     else {
 440         std::string command(rl_line_buffer, rl_end);
 441         command += '\n';
 442         std::stringbuf stream(command);
 443
 444         size_t last(std::string::npos);
 445         for (size_t i(0); i != std::string::npos; i = command.find('\n', i + 1))
 446             ++last;
 447
 448         CYPool pool;
 449         CYDriver driver(pool, stream);
 450         if (driver.Parse() || !driver.errors_.empty())
 451             for (CYDriver::Errors::const_iterator error(driver.errors_.begin()); error != driver.errors_.end(); ++error) {
 452                 if (error->location_.begin.line != last + 1)
 453                     done = true;
 454                 break;
 455             }
 456         else
 457             done = true;
 458     }
 459
 460     if (done) {
 461         _lblcall(&rl_newline, count, key);
 462         return 0;
 463     }
 464
 465     // XXX: this was the most obvious fix, but is seriously dumb
 466     goto insert;
 467 }
 468
 469 static int CYConsoleKeyUp(int count, int key) {
 470     for (; count != 0; --count) {
 471         char *after(CYmemrchr(rl_line_buffer, '\n', rl_point));
 472         if (after == NULL) {
 473             if (int value = rl_get_previous_history(1, key))
 474                 return value;
 475             continue;
 476         }
 477
 478         char *before(CYmemrchr(rl_line_buffer, '\n', after - rl_line_buffer));
 479         if (before == NULL)
 480             before = rl_line_buffer - 1;
 481
 482         ptrdiff_t offset(rl_line_buffer + rl_point - after);
 483         if (offset > after - before)
 484             rl_point = after - rl_line_buffer;
 485         else
 486             rl_point = before + offset - rl_line_buffer;
 487     }
 488
 489     return 0;
 490 }
 491
 492 static int CYConsoleKeyDown(int count, int key) {
 493     for (; count != 0; --count) {
 494         char *after(static_cast<char *>(memchr(rl_line_buffer + rl_point, '\n', rl_end - rl_point)));
 495         if (after == NULL) {
 496             int where(where_history());
 497             if (int value = rl_get_next_history(1, key))
 498                 return value;
 499             if (where != where_history()) {
 500                 char *first(static_cast<char *>(memchr(rl_line_buffer, '\n', rl_end)));
 501                 if (first != NULL)
 502                     rl_point = first - 1 - rl_line_buffer;
 503             }
 504             continue;
 505         }
 506
 507         char *before(CYmemrchr(rl_line_buffer, '\n', rl_point));
 508         if (before == NULL)
 509             before = rl_line_buffer - 1;
 510
 511         char *next(static_cast<char *>(memchr(after + 1, '\n', rl_line_buffer + rl_end - after - 1)));
 512         if (next == NULL)
 513             next = rl_line_buffer + rl_end;
 514
 515         ptrdiff_t offset(rl_line_buffer + rl_point - before);
 516         if (offset > next - after)
 517             rl_point = next - rl_line_buffer;
 518         else
 519             rl_point = after + offset - rl_line_buffer;
 520     }
 521
 522     return 0;
 523 }
 524
 525 static int CYConsoleLineBegin(int count, int key) {
 526     while (rl_point != 0 && rl_line_buffer[rl_point - 1] != '\n')
 527         --rl_point;
 528     return 0;
 529 }
 530
 531 static int CYConsoleLineEnd(int count, int key) {
 532     while (rl_point != rl_end && rl_line_buffer[rl_point] != '\n')
 533         ++rl_point;
 534     if (rl_point != rl_end && rl_editing_mode == 0)
 535         --rl_point;
 536     return 0;
 537 }
 538
 539 static int CYConsoleKeyBack(int count, int key) {
 540     for (; count != 0; --count) {
 541         if (rl_point == 0)
 542             return 1;
 543
 544         char *before(CYmemrchr(rl_line_buffer, '\n', rl_point));
 545         if (before == NULL) {
 546             int adjust(std::min(count, rl_point));
 547             _lblcall(&rl_rubout, adjust, key);
 548             count -= adjust - 1;
 549             continue;
 550         }
 551
 552         int start(before + 1 - rl_line_buffer);
 553         if (start == rl_point) rubout: {
 554             _lblcall(&rl_rubout, 1, key);
 555             continue;
 556         }
 557
 558         for (int i(start); i != rl_point; ++i)
 559             if (rl_line_buffer[i] != ' ')
 560                 goto rubout;
 561         _lblcall(&rl_rubout, (rl_point - start) % 4 ?: 4, key);
 562     }
 563
 564     return 0;
 565 }
 566
 567 static int CYConsoleKeyTab(int count, int key) {
 568     char *before(CYmemrchr(rl_line_buffer, '\n', rl_point));
 569     if (before == NULL) complete:
 570         return rl_complete_internal(rl_completion_mode(&CYConsoleKeyTab));
 571     int start(before + 1 - rl_line_buffer);
 572     for (int i(start); i != rl_point; ++i)
 573         if (rl_line_buffer[i] != ' ')
 574             goto complete;
 575     _lblcall(&rl_insert, 4 - (rl_point - start) % 4, ' ');
 576     return 0;
 577 }
 578
 579 static void CYConsoleRemapBind(Keymap map, rl_command_func_t *from, rl_command_func_t *to) {
 580     char **keyseqs(rl_invoking_keyseqs_in_map(from, map));
 581     if (keyseqs == NULL)
 582         return;
 583     for (char **keyseq(keyseqs); *keyseq != NULL; ++keyseq) {
 584         rl_bind_keyseq_in_map(*keyseq, to, map);
 585         free(*keyseq);
 586     }
 587     free(keyseqs);
 588 }
 589
 590 static void CYConsoleRemapKeys(Keymap map) {
 591     CYConsoleRemapBind(map, &rl_beg_of_line, &CYConsoleLineBegin);
 592     CYConsoleRemapBind(map, &rl_end_of_line, &CYConsoleLineEnd);
 593
 594     CYConsoleRemapBind(map, &rl_get_previous_history, &CYConsoleKeyUp);
 595     CYConsoleRemapBind(map, &rl_get_next_history, &CYConsoleKeyDown);
 596
 597     CYConsoleRemapBind(map, &rl_rubout, &CYConsoleKeyBack);
 598     CYConsoleRemapBind(map, &rl_complete, &CYConsoleKeyTab);
 599 }
 600
 601 static void CYConsolePrepTerm(int meta) {
 602     rl_prep_terminal(meta);
 603
 604     CYConsoleRemapKeys(emacs_standard_keymap);
 605     CYConsoleRemapKeys(emacs_meta_keymap);
 606     CYConsoleRemapKeys(emacs_ctlx_keymap);
 607     CYConsoleRemapKeys(vi_insertion_keymap);
 608     CYConsoleRemapKeys(vi_movement_keymap);
 609 }
 610
 611 static void CYOutputRun(const std::string &code, bool reparse = false) {
 612     CYPool pool;
 613     Output(Run(pool, client_, code), &std::cout, reparse);
 614 }
 615
 616 static void Console(CYOptions &options) {
 617     std::string basedir;
 618 #ifdef __ANDROID__
 619     basedir = "/data/local/tmp";
 620 #else
 621     if (const char *home = getenv("HOME"))
 622         basedir = home;
 623     else {
 624         passwd *passwd;
 625         if (const char *username = getenv("LOGNAME"))
 626             passwd = getpwnam(username);
 627         else
 628             passwd = getpwuid(getuid());
 629         basedir = passwd->pw_dir;
 630     }
 631 #endif
 632
 633     basedir += "/.cycript";
 634     mkdir(basedir.c_str(), 0700);
 635
 636     rl_initialize();
 637     rl_readline_name = name_;
 638
 639     History history(basedir + "/history");
 640
 641     bool bypass(false);
 642     bool debug(false);
 643     bool lower(true);
 644     bool reparse(false);
 645
 646     out_ = &std::cout;
 647
 648     rl_completer_word_break_characters = break_;
 649     rl_attempted_completion_function = &Complete;
 650
 651     if (cur_term != NULL) {
 652         rl_redisplay_function = CYDisplayUpdate;
 653         rl_prep_term_function = CYConsolePrepTerm;
 654     }
 655
 656     CYOutputRun("");
 657
 658     for (;;) {
 659         struct sigaction action;
 660         sigemptyset(&action.sa_mask);
 661         action.sa_handler = &sigint;
 662         action.sa_flags = 0;
 663         sigaction(SIGINT, &action, NULL);
 664
 665         if (setjmp(ctrlc_) != 0) {
 666             mode_ = Working;
 667             *out_ << std::endl;
 668             continue;
 669         }
 670
 671         if (bypass) {
 672             rl_bind_key('\r', &rl_newline);
 673             rl_bind_key('\n', &rl_newline);
 674         } else {
 675             rl_bind_key('\r', &CYConsoleKeyReturn);
 676             rl_bind_key('\n', &CYConsoleKeyReturn);
 677         }
 678
 679         mode_ = Parsing;
 680         char *line(readline("cy# "));
 681         mode_ = Working;
 682
 683         if (line == NULL) {
 684             *out_ << std::endl;
 685             break;
 686         }
 687
 688         std::string command(line);
 689         free(line);
 690         if (command.empty())
 691             continue;
 692         history += command;
 693
 694         if (command[0] == '?') {
 695             std::string data(command.substr(1));
 696             if (data == "bypass") {
 697                 bypass = !bypass;
 698                 *out_ << "bypass == " << (bypass ? "true" : "false") << std::endl;
 699             } else if (data == "debug") {
 700                 debug = !debug;
 701                 *out_ << "debug == " << (debug ? "true" : "false") << std::endl;
 702             } else if (data == "destroy") {
 703                 CYDestroyContext();
 704             } else if (data == "gc") {
 705                 *out_ << "collecting... " << std::flush;
 706                 CYGarbageCollect(CYGetJSContext());
 707                 *out_ << "done." << std::endl;
 708             } else if (data == "exit") {
 709                 return;
 710             } else if (data == "lower") {
 711                 lower = !lower;
 712                 *out_ << "lower == " << (lower ? "true" : "false") << std::endl;
 713             } else if (data == "reparse") {
 714                 reparse = !reparse;
 715                 *out_ << "reparse == " << (reparse ? "true" : "false") << std::endl;
 716             }
 717
 718             continue;
 719         }
 720
 721         std::string code;
 722         if (bypass)
 723             code = command;
 724         else try {
 725             std::stringbuf stream(command);
 726
 727             CYPool pool;
 728             CYDriver driver(pool, stream);
 729             Setup(driver);
 730
 731             if (driver.Parse() || !driver.errors_.empty()) {
 732                 for (CYDriver::Errors::const_iterator error(driver.errors_.begin()); error != driver.errors_.end(); ++error) {
 733                     CYPosition begin(error->location_.begin);
 734                     CYPosition end(error->location_.end);
 735
 736                     /*if (begin.line != lines2.size()) {
 737                         std::cerr << "  | ";
 738                         std::cerr << lines2[begin.line - 1] << std::endl;
 739                     }*/
 740
 741                     std::cerr << "....";
 742                     for (size_t i(0); i != begin.column; ++i)
 743                         std::cerr << '.';
 744                     if (begin.line != end.line || begin.column == end.column)
 745                         std::cerr << '^';
 746                     else for (size_t i(0), e(end.column - begin.column); i != e; ++i)
 747                         std::cerr << '^';
 748                     std::cerr << std::endl;
 749
 750                     std::cerr << "  | ";
 751                     std::cerr << error->message_ << std::endl;
 752
 753                     break;
 754                 }
 755
 756                 continue;
 757             }
 758
 759             if (driver.script_ == NULL)
 760                 continue;
 761
 762             std::stringbuf str;
 763             CYOutput out(str, options);
 764             Setup(out, driver, options, lower);
 765             out << *driver.script_;
 766             code = str.str();
 767         } catch (const CYException &error) {
 768             CYPool pool;
 769             std::cout << error.PoolCString(pool) << std::endl;
 770             continue;
 771         }
 772
 773         if (debug) {
 774             std::cout << "cy= ";
 775             CYLexerHighlight(code.c_str(), code.size(), std::cout);
 776             std::cout << std::endl;
 777         }
 778
 779         CYOutputRun(code, reparse);
 780     }
 781 }
 782
 783 void InjectLibrary(pid_t, int, const char *const []);
 784
 785 static uint64_t CYGetTime() {
 786 #ifdef __APPLE__
 787     return mach_absolute_time();
 788 #else
 789     struct timespec spec;
 790     clock_gettime(CLOCK_MONOTONIC, &spec);
 791     return spec.tv_sec * UINT64_C(1000000000) + spec.tv_nsec;
 792 #endif
 793 }
 794
 795 int Main(int argc, char * const argv[], char const * const envp[]) {
 796     bool tty(isatty(STDIN_FILENO));
 797     bool compile(false);
 798     bool target(false);
 799     CYOptions options;
 800
 801     append_history$ = (int (*)(int, const char *)) (dlsym(RTLD_DEFAULT, "append_history"));
 802
 803 #ifdef CY_ATTACH
 804     pid_t pid(_not(pid_t));
 805 #endif
 806
 807     const char *host(NULL);
 808     const char *port(NULL);
 809
 810     const char *argv0(argv[0]);
 811
 812     optind = 1;
 813
 814     for (;;) {
 815         int option(getopt_long(argc, argv,
 816             "c"
 817             "g:"
 818             "n:"
 819 #ifdef CY_ATTACH
 820             "p:"
 821 #endif
 822             "r:"
 823             "s"
 824         , (const struct option[]) {
 825             {NULL, no_argument, NULL, 'c'},
 826             {NULL, required_argument, NULL, 'g'},
 827             {NULL, required_argument, NULL, 'n'},
 828 #ifdef CY_ATTACH
 829             {NULL, required_argument, NULL, 'p'},
 830 #endif
 831             {NULL, required_argument, NULL, 'r'},
 832             {NULL, no_argument, NULL, 's'},
 833         {0, 0, 0, 0}}, NULL));
 834
 835         switch (option) {
 836             case -1:
 837                 goto getopt;
 838
 839             case ':':
 840             case '?':
 841                 fprintf(stderr,
 842                     "usage: cycript [-c]"
 843 #ifdef CY_ATTACH
 844                     " [-p <pid|name>]"
 845 #endif
 846                     " [-r <host:port>]"
 847                     " [<script> [<arg>...]]\n"
 848                 );
 849                 return 1;
 850
 851             target:
 852                 if (!target)
 853                     target = true;
 854                 else {
 855                     fprintf(stderr, "only one of -[c"
 856 #ifdef CY_ATTACH
 857                     "p"
 858 #endif
 859                     "r] may be used at a time\n");
 860                     return 1;
 861                 }
 862             break;
 863
 864             case 'c':
 865                 compile = true;
 866             goto target;
 867
 868             case 'g':
 869                 if (false);
 870                 else if (strcmp(optarg, "rename") == 0)
 871                     options.verbose_ = true;
 872                 else if (strcmp(optarg, "bison") == 0)
 873                     bison_ = true;
 874                 else if (strcmp(optarg, "timing") == 0)
 875                     timing_ = true;
 876                 else {
 877                     fprintf(stderr, "invalid name for -g\n");
 878                     return 1;
 879                 }
 880             break;
 881
 882             case 'n':
 883                 if (false);
 884                 else if (strcmp(optarg, "minify") == 0)
 885                     pretty_ = true;
 886                 else {
 887                     fprintf(stderr, "invalid name for -n\n");
 888                     return 1;
 889                 }
 890             break;
 891
 892 #ifdef CY_ATTACH
 893             case 'p': {
 894                 size_t size(strlen(optarg));
 895                 char *end;
 896
 897                 pid = strtoul(optarg, &end, 0);
 898                 if (optarg + size != end) {
 899                     // XXX: arg needs to be escaped in some horrendous way of doom
 900                     // XXX: this is a memory leak now because I just don't care enough
 901                     char *command;
 902                     int writ(asprintf(&command, "ps axc|sed -e '/^ *[0-9]/{s/^ *\\([0-9]*\\)\\( *[^ ]*\\)\\{3\\} *-*\\([^ ]*\\)/\\3 \\1/;/^%s /{s/^[^ ]* //;q;};};d'", optarg));
 903                     _assert(writ != -1);
 904
 905                     if (FILE *pids = popen(command, "r")) {
 906                         char value[32];
 907                         size = 0;
 908
 909                         for (;;) {
 910                             size_t read(fread(value + size, 1, sizeof(value) - size, pids));
 911                             if (read == 0)
 912                                 break;
 913                             else {
 914                                 size += read;
 915                                 if (size == sizeof(value))
 916                                     goto fail;
 917                             }
 918                         }
 919
 920                       size:
 921                         if (size == 0)
 922                             goto fail;
 923                         if (value[size - 1] == '\n') {
 924                             --size;
 925                             goto size;
 926                         }
 927
 928                         value[size] = '\0';
 929                         size = strlen(value);
 930                         pid = strtoul(value, &end, 0);
 931                         if (value + size != end) fail:
 932                             pid = _not(pid_t);
 933                         _syscall(pclose(pids));
 934                     }
 935
 936                     if (pid == _not(pid_t)) {
 937                         fprintf(stderr, "unable to find process `%s' using ps\n", optarg);
 938                         return 1;
 939                     }
 940                 }
 941             } goto target;
 942 #endif
 943
 944             case 'r': {
 945                 //size_t size(strlen(optarg));
 946
 947                 char *colon(strrchr(optarg, ':'));
 948                 if (colon == NULL) {
 949                     fprintf(stderr, "missing colon in hostspec\n");
 950                     return 1;
 951                 }
 952
 953                 /*char *end;
 954                 port = strtoul(colon + 1, &end, 10);
 955                 if (end != optarg + size) {
 956                     fprintf(stderr, "invalid port in hostspec\n");
 957                     return 1;
 958                 }*/
 959
 960                 host = optarg;
 961                 *colon = '\0';
 962                 port = colon + 1;
 963             } goto target;
 964
 965             case 's':
 966                 strict_ = true;
 967             break;
 968
 969             default:
 970                 _assert(false);
 971         }
 972     }
 973
 974   getopt:
 975     argc -= optind;
 976     argv += optind;
 977
 978     const char *script;
 979
 980 #ifdef CY_ATTACH
 981     if (pid != _not(pid_t) && argc > 1) {
 982         fprintf(stderr, "-p cannot set argv\n");
 983         return 1;
 984     }
 985 #endif
 986
 987     if (argc == 0)
 988         script = NULL;
 989     else {
 990         script = argv[0];
 991         if (strcmp(script, "-") == 0)
 992             script = NULL;
 993         --argc;
 994         ++argv;
 995     }
 996
 997 #ifdef CY_EXECUTE
 998     // XXX: const_cast?! wtf gcc :(
 999     CYSetArgs(argv0, script, argc, const_cast<const char **>(argv));
1000 #endif
1001
1002 #ifdef CY_ATTACH
1003     if (pid == _not(pid_t))
1004         client_ = -1;
1005     else {
1006         struct Socket {
1007             int fd_;
1008
1009             Socket(int fd) :
1010                 fd_(fd)
1011             {
1012             }
1013
1014             ~Socket() {
1015                 close(fd_);
1016             }
1017
1018             operator int() {
1019                 return fd_;
1020             }
1021         } server(_syscall(socket(PF_UNIX, SOCK_STREAM, 0)));
1022
1023         struct sockaddr_un address;
1024         memset(&address, 0, sizeof(address));
1025         address.sun_family = AF_UNIX;
1026
1027         const char *tmp;
1028 #if defined(__APPLE__) && (defined(__arm__) || defined(__arm64__))
1029         tmp = "/Library/Caches";
1030 #else
1031         tmp = "/tmp";
1032 #endif
1033
1034         sprintf(address.sun_path, "%s/.s.cy.%u", tmp, getpid());
1035         unlink(address.sun_path);
1036
1037         struct File {
1038             const char *path_;
1039
1040             File(const char *path) :
1041                 path_(path)
1042             {
1043             }
1044
1045             ~File() {
1046                 unlink(path_);
1047             }
1048         } file(address.sun_path);
1049
1050         _syscall(bind(server, reinterpret_cast<sockaddr *>(&address), sizeof(address)));
1051         _syscall(chmod(address.sun_path, 0777));
1052
1053         _syscall(listen(server, 1));
1054         const char *const argv[] = {address.sun_path, NULL};
1055         InjectLibrary(pid, 1, argv);
1056         client_ = _syscall(accept(server, NULL, NULL));
1057     }
1058 #else
1059     client_ = -1;
1060 #endif
1061
1062     if (client_ == -1 && host != NULL && port != NULL) {
1063         struct addrinfo hints;
1064         memset(&hints, 0, sizeof(hints));
1065         hints.ai_family = AF_UNSPEC;
1066         hints.ai_socktype = SOCK_STREAM;
1067         hints.ai_protocol = 0;
1068         hints.ai_flags = 0;
1069
1070         struct addrinfo *infos;
1071         _syscall(getaddrinfo(host, port, &hints, &infos));
1072
1073         _assert(infos != NULL); try {
1074             for (struct addrinfo *info(infos); info != NULL; info = info->ai_next) {
1075                 int client(_syscall(socket(info->ai_family, info->ai_socktype, info->ai_protocol))); try {
1076                     _syscall(connect(client, info->ai_addr, info->ai_addrlen));
1077                     client_ = client;
1078                     break;
1079                 } catch (...) {
1080                     _syscall(close(client));
1081                     throw;
1082                 }
1083             }
1084         } catch (...) {
1085             freeaddrinfo(infos);
1086             throw;
1087         }
1088     }
1089
1090     if (script == NULL && tty)
1091         Console(options);
1092     else {
1093         std::istream *stream;
1094         if (script == NULL) {
1095             stream = &std::cin;
1096             script = "<stdin>";
1097         } else {
1098             stream = new std::fstream(script, std::ios::in | std::ios::binary);
1099             _assert(!stream->fail());
1100         }
1101
1102         if (timing_) {
1103             std::stringbuf buffer;
1104             stream->get(buffer, '\0');
1105             _assert(!stream->fail());
1106
1107             double average(0);
1108             int samples(-50);
1109             uint64_t start(CYGetTime());
1110
1111             for (;;) {
1112                 stream = new std::istringstream(buffer.str());
1113
1114                 CYPool pool;
1115                 CYDriver driver(pool, *stream->rdbuf(), script);
1116                 Setup(driver);
1117
1118                 uint64_t begin(CYGetTime());
1119                 driver.Parse();
1120                 uint64_t end(CYGetTime());
1121
1122                 delete stream;
1123
1124                 average += (end - begin - average) / ++samples;
1125
1126                 uint64_t now(CYGetTime());
1127                 if (samples == 0)
1128                     average = 0;
1129                 else if ((now - start) / 1000000000 >= 1)
1130                     std::cout << std::fixed << average << '\t' << (end - begin) << '\t' << samples << std::endl;
1131                 else continue;
1132
1133                 start = now;
1134             }
1135
1136             stream = new std::istringstream(buffer.str());
1137             std::cin.get();
1138         }
1139
1140         CYPool pool;
1141         CYDriver driver(pool, *stream->rdbuf(), script);
1142         Setup(driver);
1143
1144         bool failed(driver.Parse());
1145
1146         if (failed || !driver.errors_.empty()) {
1147             for (CYDriver::Errors::const_iterator i(driver.errors_.begin()); i != driver.errors_.end(); ++i)
1148                 std::cerr << i->location_.begin << ": " << i->message_ << std::endl;
1149             return 1;
1150         } else if (driver.script_ != NULL) {
1151             std::stringbuf str;
1152             CYOutput out(str, options);
1153             Setup(out, driver, options, true);
1154             out << *driver.script_;
1155             std::string code(str.str());
1156             if (compile)
1157                 std::cout << code;
1158             else {
1159                 CYUTF8String json(Run(pool, client_, code));
1160                 if (CYStartsWith(json, "throw ")) {
1161                     CYLexerHighlight(json.data, json.size, std::cerr);
1162                     std::cerr << std::endl;
1163                     return 1;
1164                 }
1165             }
1166         }
1167     }
1168
1169     return 0;
1170 }
1171
1172 _visible int main(int argc, char * const argv[], char const * const envp[]) {
1173     try {
1174         return Main(argc, argv, envp);
1175     } catch (const CYException &error) {
1176         CYPool pool;
1177         fprintf(stderr, "%s\n", error.PoolCString(pool));
1178         return 1;
1179     }
1180 }