lily/lily-guile.cc

   1 /*
   2   lily-guile.cc -- implement assorted SCM interface functions
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 1998--2007 Jan Nieuwenhuizen <janneke@gnu.org>
   7   Han-Wen Nienhuys <hanwen@xs4all.nl>
   8 */
   9
  10 #include "lily-guile.hh"
  11
  12 #include <cstdio>
  13 #include <cstdlib>
  14 #include <cstring> /* strdup, strchr */
  15 #include <cctype>
  16
  17 using namespace std;
  18
  19 #include "dimensions.hh"
  20 #include "direction.hh"
  21 #include "file-path.hh"
  22 #include "international.hh"
  23 #include "libc-extension.hh"
  24 #include "main.hh"
  25 #include "misc.hh"
  26 #include "offset.hh"
  27 #include "pitch.hh"
  28 #include "string-convert.hh"
  29 #include "source-file.hh"
  30 #include "version.hh"
  31 #include "warn.hh"
  32
  33
  34 /*
  35   symbols/strings.
  36  */
  37 string
  38 ly_scm_write_string (SCM s)
  39 {
  40   SCM port = scm_mkstrport (SCM_INUM0,
  41                             scm_make_string (SCM_INUM0, SCM_UNDEFINED),
  42                             SCM_OPN | SCM_WRTNG,
  43                             "ly_write2string");
  44   //  SCM write = scm_eval_3 (ly_symbol2scm ("write"), s, SCM_EOL);
  45   SCM write = scm_primitive_eval (ly_symbol2scm ("write"));
  46
  47   // scm_apply (write, port, SCM_EOL);
  48   scm_call_2 (write, s, port);
  49   return ly_scm2string (scm_strport_to_string (port));
  50 }
  51
  52 SCM
  53 ly_quote_scm (SCM s)
  54 {
  55   return scm_list_n (ly_symbol2scm ("quote"), s, SCM_UNDEFINED);
  56 }
  57
  58 string
  59 ly_symbol2string (SCM s)
  60 {
  61   /*
  62     Ugh. this is not very efficient.
  63   */
  64   SCM str = scm_symbol_to_string (s);
  65   return ly_scm2string (str);
  66 }
  67
  68 string
  69 gulp_file_to_string (string fn, bool must_exist, int size)
  70 {
  71   string s = global_path.find (fn);
  72   if (s == "")
  73     {
  74       if (must_exist)
  75         {
  76           string e = _f ("cannot find file: `%s'", fn);
  77           e += " ";
  78           e += _f ("(load path: `%s')", global_path.to_string ());
  79           error (e);
  80           /* unreachable */
  81         }
  82       return s;
  83     }
  84
  85   if (be_verbose_global)
  86     progress_indication ("[" + s);
  87
  88   vector<char> chars = gulp_file (s, size);
  89   string result (&chars[0], chars.size ());
  90
  91   if (be_verbose_global)
  92     progress_indication ("]");
  93
  94   return result;
  95 }
  96
  97 extern "C" {
  98   // maybe gdb 5.0 becomes quicker if it doesn't do fancy C++ typing?
  99   void
 100   ly_display_scm (SCM s)
 101   {
 102     scm_display (s, scm_current_output_port ());
 103     scm_newline (scm_current_output_port ());
 104   }
 105 };
 106
 107 /*
 108   STRINGS
 109  */
 110 string
 111 ly_scm2string (SCM str)
 112 {
 113   assert (scm_is_string (str));
 114   string result;
 115   size_t len = scm_c_string_length (str);
 116   if (len) {
 117     result.resize(len);
 118     scm_to_locale_stringbuf(str, &result.at(0), len);
 119   }
 120   return result;
 121 }
 122
 123 SCM
 124 ly_string2scm (string const &str)
 125 {
 126   return scm_from_locale_stringn (str.c_str (),
 127                                   str.length ());
 128 }
 129
 130
 131 char *
 132 ly_scm2newstr (SCM str, size_t *lenp)
 133 {
 134   char* p = scm_to_locale_stringn(str, lenp);
 135   return p;
 136 }
 137
 138 /*
 139   PAIRS
 140 */
 141 SCM
 142 index_get_cell (SCM s, Direction d)
 143 {
 144   assert (d);
 145   return (d == LEFT) ? scm_car (s) : scm_cdr (s);
 146 }
 147
 148 SCM
 149 index_set_cell (SCM s, Direction d, SCM v)
 150 {
 151   if (d == LEFT)
 152     scm_set_car_x (s, v);
 153   else if (d == RIGHT)
 154     scm_set_cdr_x (s, v);
 155   return s;
 156 }
 157
 158 bool
 159 is_number_pair (SCM p)
 160 {
 161   return scm_is_pair (p)
 162     && scm_is_number (scm_car (p)) && scm_is_number (scm_cdr (p));
 163 }
 164
 165
 166 unsigned int
 167 ly_scm_hash (SCM s)
 168 {
 169   return scm_ihashv (s, ~1u);
 170 }
 171
 172 bool
 173 is_axis (SCM s)
 174 {
 175   if (scm_is_number (s))
 176     {
 177       int i = scm_to_int (s);
 178       return i == 0 || i == 1;
 179     }
 180   return false;
 181 }
 182
 183 bool
 184 to_boolean (SCM s)
 185 {
 186   return scm_is_bool (s) && ly_scm2bool (s);
 187 }
 188
 189 /*
 190   DIRECTIONS
 191  */
 192 Direction
 193 to_dir (SCM s)
 194 {
 195   return scm_is_integer (s) ? (Direction) scm_to_int (s) : CENTER;
 196 }
 197
 198 Direction
 199 robust_scm2dir (SCM d, Direction def)
 200 {
 201   if (is_direction (d))
 202     def = to_dir (d);
 203   return def;
 204 }
 205
 206 bool
 207 is_direction (SCM s)
 208 {
 209   if (scm_is_number (s))
 210     {
 211       int i = scm_to_int (s);
 212       return i >= -1 && i <= 1;
 213     }
 214   return false;
 215 }
 216
 217 /*
 218   INTERVALS
 219  */
 220 Interval
 221 ly_scm2interval (SCM p)
 222 {
 223   return Interval (scm_to_double (scm_car (p)), scm_to_double (scm_cdr (p)));
 224 }
 225
 226 Drul_array<Real>
 227 ly_scm2realdrul (SCM p)
 228 {
 229   return Drul_array<Real> (scm_to_double (scm_car (p)),
 230                            scm_to_double (scm_cdr (p)));
 231 }
 232
 233 SCM
 234 ly_interval2scm (Drul_array<Real> i)
 235 {
 236   return scm_cons (scm_from_double (i[LEFT]), scm_from_double (i[RIGHT]));
 237 }
 238
 239
 240 Interval
 241 robust_scm2interval (SCM k, Drul_array<Real> v)
 242 {
 243   Interval i;
 244   i[LEFT] = v[LEFT];
 245   i[RIGHT] = v[RIGHT];
 246   if (is_number_pair (k))
 247     i = ly_scm2interval (k);
 248   return i;
 249 }
 250
 251 Drul_array<Real>
 252 robust_scm2drul (SCM k, Drul_array<Real> v)
 253 {
 254   if (is_number_pair (k))
 255     v = ly_scm2interval (k);
 256   return v;
 257 }
 258
 259 Drul_array<bool>
 260 robust_scm2booldrul (SCM k, Drul_array<bool> def)
 261 {
 262   if (scm_is_pair (k))
 263     {
 264       def[LEFT] = to_boolean (scm_car (k));
 265       def[RIGHT] = to_boolean (scm_cdr (k));
 266     }
 267   return def;
 268 }
 269
 270 /*
 271   OFFSET
 272 */
 273 SCM
 274 ly_offset2scm (Offset o)
 275 {
 276   return scm_cons (scm_from_double (o[X_AXIS]), scm_from_double (o[Y_AXIS]));
 277 }
 278
 279 Offset
 280 ly_scm2offset (SCM s)
 281 {
 282   return Offset (scm_to_double (scm_car (s)),
 283                  scm_to_double (scm_cdr (s)));
 284 }
 285
 286 Offset
 287 robust_scm2offset (SCM k, Offset o)
 288 {
 289   if (is_number_pair (k))
 290     o = ly_scm2offset (k);
 291   return o;
 292 }
 293 SCM
 294 ly_offsets2scm (vector<Offset> os)
 295 {
 296   SCM l = SCM_EOL;
 297   SCM *tail = &l;
 298   for (vsize i = 0; i < os.size (); i++)
 299     {
 300       *tail = scm_cons (ly_offset2scm (os[i]), SCM_EOL);
 301       tail = SCM_CDRLOC (*tail);
 302     }
 303   return l;
 304 }
 305
 306 vector<Offset>
 307 ly_scm2offsets (SCM s)
 308 {
 309   vector<Offset> os;
 310   for (; scm_is_pair (s); s = scm_cdr (s))
 311     os.push_back (ly_scm2offset (scm_car (s)));
 312   return os;
 313 }
 314
 315
 316
 317
 318 /*
 319   ALIST
 320 */
 321
 322 bool
 323 alist_equal_p (SCM a, SCM b)
 324 {
 325   for (SCM s = a;
 326        scm_is_pair (s); s = scm_cdr (s))
 327     {
 328       SCM key = scm_caar (s);
 329       SCM val = scm_cdar (s);
 330       SCM l = scm_assoc (key, b);
 331
 332       if (l == SCM_BOOL_F
 333           || !ly_is_equal (scm_cdr (l), val))
 334
 335         return false;
 336     }
 337   return true;
 338 }
 339
 340 SCM
 341 ly_alist_vals (SCM alist)
 342 {
 343   SCM x = SCM_EOL;
 344   for (SCM p = alist; scm_is_pair (p); p = scm_cdr (p))
 345     x = scm_cons (scm_cdar (p), x);
 346   return x;
 347 }
 348
 349 /*
 350   LISTS
 351  */
 352
 353 /* Return I-th element, or last elt L. If I < 0, then we take the first
 354    element.
 355
 356    PRE: length (L) > 0  */
 357 SCM
 358 robust_list_ref (int i, SCM l)
 359 {
 360   while (i-- > 0 && scm_is_pair (scm_cdr (l)))
 361     l = scm_cdr (l);
 362   return scm_car (l);
 363 }
 364
 365
 366 SCM
 367 ly_deep_copy (SCM src)
 368 {
 369   if (scm_is_pair (src))
 370     return scm_cons (ly_deep_copy (scm_car (src)), ly_deep_copy (scm_cdr (src)));
 371   else if (scm_is_vector (src))
 372     {
 373       int len = scm_c_vector_length (src);
 374       SCM nv = scm_c_make_vector (len, SCM_UNDEFINED);
 375       for (int i = 0;i < len; i++)
 376         {
 377           SCM si = scm_from_int (i);
 378           scm_vector_set_x (nv, si, ly_deep_copy (scm_vector_ref (src, si)));
 379         }
 380     }
 381   return src;
 382 }
 383
 384 string
 385 print_scm_val (SCM val)
 386 {
 387   string realval = ly_scm_write_string (val);
 388   if (realval.length () > 200)
 389     realval = realval.substr (0, 100)
 390       + "\n :\n :\n"
 391       + realval.substr (realval.length () - 100);
 392   return realval;
 393 }
 394
 395 bool
 396 type_check_assignment (SCM sym, SCM val, SCM type_symbol)
 397 {
 398   bool ok = true;
 399
 400   /*
 401     Always succeeds.
 402
 403
 404     TODO: should remove #f from allowed vals?
 405   */
 406   if (val == SCM_EOL || val == SCM_BOOL_F)
 407     return ok;
 408
 409   if (!scm_is_symbol (sym))
 410 #if 0
 411     return false;
 412 #else
 413   /*
 414     This is used for autoBeamSettings.
 415
 416     TODO: deprecate the use of \override and \revert for
 417     autoBeamSettings?
 418
 419     or use a symbol autoBeamSettingS?
 420   */
 421   return true;
 422 #endif
 423
 424   SCM type = scm_object_property (sym, type_symbol);
 425
 426   if (type != SCM_EOL && !ly_is_procedure (type))
 427     {
 428       warning (_f ("cannot find property type-check for `%s' (%s).",
 429                    ly_symbol2string (sym).c_str (),
 430                    ly_symbol2string (type_symbol).c_str ())
 431                + "  " + _ ("perhaps a typing error?"));
 432
 433       /* Be strict when being anal :) */
 434       if (do_internal_type_checking_global)
 435         scm_throw (ly_symbol2scm ("ly-file-failed"), scm_list_3 (ly_symbol2scm ("typecheck"),
 436                                                                  sym, val));
 437
 438       warning (_ ("doing assignment anyway"));
 439     }
 440   else
 441     {
 442       if (val != SCM_EOL
 443           && ly_is_procedure (type)
 444           && scm_call_1 (type, val) == SCM_BOOL_F)
 445         {
 446           ok = false;
 447           SCM typefunc = ly_lily_module_constant ("type-name");
 448           SCM type_name = scm_call_1 (typefunc, type);
 449
 450           warning (_f ("type check for `%s' failed; value `%s' must be of type `%s'",
 451                        ly_symbol2string (sym).c_str (),
 452                        print_scm_val (val),
 453                        ly_scm2string (type_name).c_str ()));
 454           progress_indication ("\n");
 455         }
 456     }
 457   return ok;
 458 }
 459
 460 /* some SCM abbrevs
 461
 462 zijn deze nou handig?
 463 zijn ze er al in scheme, maar heten ze anders? */
 464
 465 /* Remove doubles from (sorted) list */
 466 SCM
 467 ly_unique (SCM list)
 468 {
 469   SCM unique = SCM_EOL;
 470   for (SCM i = list; scm_is_pair (i); i = scm_cdr (i))
 471     {
 472       if (!scm_is_pair (scm_cdr (i))
 473           || !ly_is_equal (scm_car (i), scm_cadr (i)))
 474         unique = scm_cons (scm_car (i), unique);
 475     }
 476   return scm_reverse_x (unique, SCM_EOL);
 477 }
 478
 479
 480 /* Split list at member s, removing s.
 481    Return (BEFORE . AFTER)  */
 482 SCM
 483 ly_split_list (SCM s, SCM list)
 484 {
 485   SCM before = SCM_EOL;
 486   SCM after = list;
 487   for (; scm_is_pair (after);)
 488     {
 489       SCM i = scm_car (after);
 490       after = scm_cdr (after);
 491       if (ly_is_equal (i, s))
 492         break;
 493       before = scm_cons (i, before);
 494     }
 495   return scm_cons (scm_reverse_x (before, SCM_EOL), after);
 496 }
 497
 498 void
 499 taint (SCM *)
 500 {
 501   /*
 502     nop.
 503   */
 504 }
 505
 506 /*
 507   display stuff without using stack
 508 */
 509 SCM
 510 display_list (SCM s)
 511 {
 512   SCM p = scm_current_output_port ();
 513
 514   scm_puts ("(", p);
 515   for (; scm_is_pair (s); s = scm_cdr (s))
 516     {
 517       scm_display (scm_car (s), p);
 518       scm_puts (" ", p);
 519     }
 520   scm_puts (")", p);
 521   return SCM_UNSPECIFIED;
 522 }
 523
 524 Slice
 525 int_list_to_slice (SCM l)
 526 {
 527   Slice s;
 528   s.set_empty ();
 529   for (; scm_is_pair (l); l = scm_cdr (l))
 530     if (scm_is_number (scm_car (l)))
 531       s.add_point (scm_to_int (scm_car (l)));
 532   return s;
 533 }
 534
 535 Real
 536 robust_scm2double (SCM k, double x)
 537 {
 538   if (scm_is_number (k))
 539     x = scm_to_double (k);
 540   return x;
 541 }
 542
 543
 544 string
 545 robust_scm2string (SCM k, string s)
 546 {
 547   if (scm_is_string (k))
 548     s = ly_scm2string (k);
 549   return s;
 550 }
 551
 552 int
 553 robust_scm2int (SCM k, int o)
 554 {
 555   if (scm_integer_p (k) == SCM_BOOL_T)
 556     o = scm_to_int (k);
 557   return o;
 558 }
 559
 560
 561 SCM
 562 ly_rational2scm (Rational r)
 563 {
 564   return scm_divide (scm_from_int (r.numerator ()), scm_from_int (r.denominator ()));
 565 }
 566
 567
 568 Rational
 569 ly_scm2rational (SCM r)
 570 {
 571   return Rational (scm_to_int (scm_numerator (r)),
 572                    scm_to_int (scm_denominator (r)));
 573 }
 574
 575 Rational
 576 robust_scm2rational (SCM n, Rational rat)
 577 {
 578   if (ly_is_fraction (n))
 579     return ly_scm2rational (n);
 580   else
 581     return rat;
 582 }
 583
 584 SCM
 585 alist_to_hashq (SCM alist)
 586 {
 587   int i = scm_ilength (alist);
 588   if (i < 0)
 589     return scm_c_make_hash_table (0);
 590
 591   SCM tab = scm_c_make_hash_table (i);
 592   for (SCM s = alist; scm_is_pair (s); s = scm_cdr (s))
 593     {
 594       SCM pt = scm_cdar (s);
 595       scm_hashq_set_x (tab, scm_caar (s), pt);
 596     }
 597   return tab;
 598 }
 599
 600 SCM
 601 ly_hash2alist (SCM tab)
 602 {
 603   SCM func = ly_lily_module_constant ("hash-table->alist");
 604   return scm_call_1 (func, tab);
 605 }
 606
 607
 608 /*
 609   C++ interfacing.
 610  */
 611
 612 string
 613 mangle_cxx_identifier (string cxx_id)
 614 {
 615   if (cxx_id.substr (0, 3) == "ly_")
 616     cxx_id = cxx_id.replace (0, 3, "ly:");
 617   else
 618     {
 619       cxx_id = String_convert::to_lower (cxx_id);
 620       cxx_id = "ly:" + cxx_id;
 621     }
 622   if (cxx_id.substr (cxx_id.length () - 2) == "_p")
 623     cxx_id = cxx_id.replace (cxx_id.length () - 2, 2, "?");
 624   else if (cxx_id.substr (cxx_id.length () - 2) == "_x")
 625     cxx_id = cxx_id.replace (cxx_id.length () - 2, 2, "!");
 626
 627   replace_all (&cxx_id, "_less?", "<?");
 628   replace_all (&cxx_id, "_2_", "->");
 629   replace_all (&cxx_id, "__", "::");
 630   replace_all (&cxx_id, '_', '-');
 631
 632
 633   return cxx_id;
 634 }
 635
 636
 637
 638 SCM
 639 ly_string_array_to_scm (vector<string> a)
 640 {
 641   SCM s = SCM_EOL;
 642   for (vsize i = a.size (); i ; i--)
 643     s = scm_cons (ly_symbol2scm (a[i - 1].c_str ()), s);
 644   return s;
 645 }
 646
 647 /* SYMBOLS is a whitespace separated list.  */
 648 SCM
 649 parse_symbol_list (char const *symbols)
 650 {
 651   while (isspace (*symbols))
 652     *symbols++;
 653   string s = symbols;
 654   replace_all (&s, '\n', ' ');
 655   replace_all (&s, '\t', ' ');
 656   replace_all (&s, "  ", " ");
 657   return ly_string_array_to_scm (string_split (s, ' '));
 658 }
 659
 660 /* GDB debugging. */
 661 struct ly_t_double_cell
 662 {
 663   SCM a;
 664   SCM b;
 665   SCM c;
 666   SCM d;
 667 };
 668
 669 /* inserts at front, removing duplicates */
 670 SCM ly_assoc_prepend_x (SCM alist, SCM key, SCM val)
 671 {
 672   return scm_acons (key, val, scm_assoc_remove_x (alist, key));
 673 }
 674