2 lily-guile.cc -- implement assorted guile functions
4 source file of the GNU LilyPond music typesetter
6 (c) 1998--2001 Jan Nieuwenhuizen <janneke@gnu.org>
8 Han-Wen Nienhuys <hanwen@cs.uu.nl>
14 #include <math.h> /* isinf */
15 #include <string.h> /* strdup, strchr */
16 #include "libc-extension.hh"
17 #include "lily-guile.hh"
19 #include "simple-file-storage.hh"
20 #include "file-path.hh"
22 #include "direction.hh"
24 #include "interval.hh"
29 return ly_car (scm_last_pair (list));
33 ly_str02scm (char const*c)
35 // this all really sucks, guile should take char const* arguments!
36 return gh_str02scm ((char*)c);
43 SCM port = scm_mkstrport (SCM_INUM0,
44 scm_make_string (SCM_INUM0, SCM_UNDEFINED),
47 // SCM write = scm_eval_3 (ly_symbol2scm ("write"), s, SCM_EOL);
48 SCM write = scm_primitive_eval (ly_symbol2scm ("write"));
50 // scm_apply (write, port, SCM_EOL);
51 gh_call2 (write, s, port);
52 return scm_strport_to_string (port);
57 Pass string to scm parser, evaluate one expression.
58 Return result value and #chars read.
60 Thanks to Gary Houston <ghouston@freewire.co.uk>
62 Need guile-1.3.4 (>1.3 anyway) for ftell on str ports -- jcn
65 ly_parse_scm (char const* s, int* n)
67 SCM str = ly_str02scm (s);
68 SCM port = scm_mkstrport (SCM_INUM0, str, SCM_OPN | SCM_RDNG,
70 SCM from = scm_ftell (port);
73 SCM answer = SCM_UNSPECIFIED;
75 /* Read expression from port */
76 if (!SCM_EOF_OBJECT_P (form = scm_read (port)))
77 answer = scm_primitive_eval (form);
84 all seems fine, but after parsing
88 read_buf has been advanced to read_pos - 1,
89 so that scm_ftell returns 1, instead of #parsed chars
93 urg: reset read_buf for scm_ftell
94 shouldn't scm_read () do this for us?
96 scm_fill_input (port);
97 SCM to = scm_ftell (port);
98 *n = gh_scm2int (to) - gh_scm2int (from);
100 /* Don't close the port here; if we re-enter this function via a
101 continuation, then the next time we enter it, we'll get an error.
102 It's a string port anyway, so there's no advantage to closing it
105 scm_close_port (port);
114 return scm_list_n (ly_symbol2scm ("quote"), s, SCM_UNDEFINED);
120 ly_symbol2string (SCM s)
122 assert (gh_symbol_p (s));
123 return String ((Byte*)SCM_STRING_CHARS (s), (int) SCM_STRING_LENGTH (s));
128 gulp_file_to_string (String fn)
130 String s = global_path.find (fn);
133 String e = _f ("can't find file: `%s'", fn);
135 e += _f ("(load path: `%s')", global_path.str ());
138 else if (verbose_global_b)
139 progress_indication ("[" + s);
142 Simple_file_storage f (s);
143 String result (f.ch_C ());
144 if (verbose_global_b)
145 progress_indication ("]");
150 ly_gulp_file (SCM fn)
152 return ly_str02scm (gulp_file_to_string (ly_scm2string (fn)).ch_C ());
157 Read a file, and shove it down GUILE. GUILE also has file read
158 functions, but you can't fiddle with the path of those.
161 read_lily_scm_file (String fn)
163 gh_eval_str ((char *) gulp_file_to_string (fn).ch_C ());
167 // maybe gdb 5.0 becomes quicker if it doesn't do fancy C++ typing?
169 ly_display_scm (SCM s)
177 ly_scm2string (SCM s)
179 assert (gh_string_p (s));
182 char *p = gh_scm2newstr (s , &len);
191 index_cell (SCM s, Direction d)
194 return (d == LEFT) ? ly_car (s) : ly_cdr (s);
198 index_set_cell (SCM s, Direction d, SCM v)
210 assert (gh_string_p (str));
211 warning ("lily-guile: " + ly_scm2string (str));
220 int i = gh_scm2int (s);
221 return (i>= -1 && i <= 1) ? SCM_BOOL_T : SCM_BOOL_F;
227 ly_number_pair_p (SCM p)
229 return gh_pair_p (p) && gh_number_p (ly_car (p)) && gh_number_p (ly_cdr (p));
235 return gh_number_p (a) && (gh_scm2int (a) == 0 || gh_scm2int (a) == 1);
238 typedef void (*Void_fptr) ();
239 Array<Void_fptr> *scm_init_funcs_;
241 void add_scm_init_func (void (*f) ())
243 if (!scm_init_funcs_)
244 scm_init_funcs_ = new Array<Void_fptr>;
246 scm_init_funcs_->push (f);
249 extern void init_cxx_function_smobs ();
252 prepend_load_path (String p )
256 "(set! %%load-path (cons \"%s\" %%load-path))", p.ch_C());
258 scm_c_eval_string (s);
262 init_lily_guile (String p )
264 // very very ugh: LILYPONDPREFIX (a hack), if set, overrules DATADIR.
265 // DATADIR (the default) should work too!
266 prepend_load_path (DIR_DATADIR);
267 prepend_load_path (DIR_DATADIR "/scm");
269 prepend_load_path (p);
271 // todo: junk this. We should make real modules iso. just loading files.
272 prepend_load_path (p + "/scm/");
274 SCM last_mod = scm_current_module ();
275 scm_set_current_module (scm_c_resolve_module ("guile"));
277 init_cxx_function_smobs ();
278 for (int i=scm_init_funcs_->size () ; i--;)
279 (scm_init_funcs_->elem (i)) ();
281 if (verbose_global_b)
282 progress_indication ("\n");
283 read_lily_scm_file ("lily.scm");
284 scm_set_current_module (last_mod);
287 unsigned int ly_scm_hash (SCM s)
289 return scm_ihashv (s, ~1u);
299 int i = gh_scm2int (s);
300 return i>= -1 && i <= 1;
311 int i = gh_scm2int (s);
312 return i== 0 || i == 1;
321 return (Direction) gh_scm2int (s);
325 ly_scm2interval (SCM p)
327 return Interval (gh_scm2double (ly_car (p)),
328 gh_scm2double (ly_cdr (p)));
332 ly_interval2scm (Interval i)
334 return gh_cons (gh_double2scm (i[LEFT]),
335 gh_double2scm (i[RIGHT]));
344 return gh_boolean_p (s) && gh_scm2bool (s);
348 Appendable list L: the cdr contains the list, the car the last cons
354 SCM s = gh_cons (SCM_EOL, SCM_EOL);
361 appendable_list_append (SCM l, SCM elt)
363 SCM newcons = gh_cons (elt, SCM_EOL);
365 gh_set_cdr_x (ly_car (l), newcons);
366 gh_set_car_x (l, newcons);
371 ly_offset2scm (Offset o)
373 return gh_cons (gh_double2scm (o[X_AXIS]), gh_double2scm (o[Y_AXIS]));
377 ly_scm2offset (SCM s)
379 return Offset (gh_scm2double (ly_car (s)),
380 gh_scm2double (ly_cdr (s)));
386 char const * cp = "unknown";
387 if (gh_number_p (exp))
391 else if (gh_string_p (exp))
395 else if (gh_procedure_p (exp))
399 else if (gh_boolean_p (exp))
403 else if (gh_pair_p (exp))
408 return ly_str02scm (cp);
412 convert without too many decimals, and leave a space at the end.
417 ly_number2string (SCM s)
419 assert (gh_number_p (s));
421 char str[400]; // ugh.
423 if (scm_exact_p (s) == SCM_BOOL_F)
425 Real r (gh_scm2double (s));
427 if (isinf (r) || isnan (r))
429 programming_error ("Infinity or NaN encountered while converting Real number; setting to zero.");
433 sprintf (str, "%8.4f ", r);
437 sprintf (str, "%d ", gh_scm2int (s));
440 return ly_str02scm (str);
444 Undef this to see if GUILE GC is causing too many swaps.
450 #include <libguile/gc.h>
453 greet_sweep (void *dummy1, void *dummy2, void *dummy3)
455 fprintf (stderr, "entering sweep\n");
459 wave_sweep_goodbye (void *dummy1, void *dummy2, void *dummy3)
461 fprintf (stderr, "leaving sweep\n");
466 #include "version.hh"
470 char const* vs = "\' (" MAJOR_VERSION " " MINOR_VERSION " " PATCH_LEVEL " " MY_PATCH_LEVEL ")" ;
472 return gh_eval_str ((char*)vs);
478 scm_c_define_gsubr ("ly-warn", 1, 0, 0,
479 (Scheme_function_unknown)ly_warning);
480 scm_c_define_gsubr ("ly-version", 0, 0, 0,
481 (Scheme_function_unknown)ly_version);
482 scm_c_define_gsubr ("ly-gulp-file", 1,0, 0,
483 (Scheme_function_unknown)ly_gulp_file);
484 scm_c_define_gsubr ("dir?", 1,0, 0, (Scheme_function_unknown)ly_isdir_p);
485 scm_c_define_gsubr ("ly-number->string", 1, 0,0,
486 (Scheme_function_unknown) ly_number2string);
490 scm_c_hook_add (&scm_before_mark_c_hook, greet_sweep, 0, 0);
491 scm_c_hook_add (&scm_before_sweep_c_hook, wave_sweep_goodbye, 0, 0);
495 ADD_SCM_INIT_FUNC (funcs, init_functions);
502 return gh_cons (ly_deep_copy (ly_car (l)), ly_deep_copy (ly_cdr (l)));
512 ly_assoc_chain (SCM key, SCM achain)
514 if (gh_pair_p (achain))
516 SCM handle = scm_assoc (key, ly_car (achain));
517 if (gh_pair_p (handle))
520 return ly_assoc_chain (key, ly_cdr (achain));
527 LIST has the form "sym1 sym2 sym3"
530 parse_symbol_list (const char * list)
532 char * s = strdup (list);
534 SCM create_list = SCM_EOL;
540 char *next = strchr (s, ' ');
544 create_list = gh_cons (ly_symbol2scm (s), create_list);
554 ly_truncate_list (int k, SCM l )
564 for (; gh_pair_p (s) && k--; s = ly_cdr (s))
569 gh_set_cdr_x (s, SCM_EOL);
575 SCM my_gh_symbol2scm (const char* x)
577 return gh_symbol2scm ((char*)x);