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