2 lily-guile.cc -- implement assorted guile functions
4 source file of the GNU LilyPond music typesetter
6 (c) 1998--2000 Jan Nieuwenhuizen <janneke@gnu.org>
8 Han-Wen Nienhuys <hanwen@cs.uu.nl>
14 #include <math.h> // isinf
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"
27 ly_str02scm (char const*c)
29 // this all really sucks, guile should take char const* arguments!
30 return gh_str02scm ((char*)c);
36 Pass string to scm parser, evaluate one expression.
37 Return result value and #chars read.
39 Thanks to Gary Houston <ghouston@freewire.co.uk>
41 Need guile-1.3.4 (>1.3 anyway) for ftell on str ports -- jcn
44 ly_parse_scm (char const* s, int* n)
46 SCM str = gh_str02scm ((char*)s);
47 SCM port = scm_mkstrport (SCM_INUM0, str, SCM_OPN | SCM_RDNG,
49 SCM from = scm_ftell (port);
52 SCM answer = SCM_UNSPECIFIED;
54 /* Read expression from port */
55 if (!SCM_EOF_OBJECT_P (form = scm_read (port)))
56 answer = scm_eval_3 (form, 1, SCM_EOL);
63 all seems fine, but after parsing
67 read_buf has been advanced to read_pos - 1,
68 so that scm_ftell returns 1, instead of #parsed chars
72 urg: reset read_buf for scm_ftell
73 shouldn't scm_read () do this for us?
75 scm_fill_input (port);
76 SCM to = scm_ftell (port);
77 *n = gh_scm2int (to) - gh_scm2int (from);
79 /* Don't close the port here; if we re-enter this function via a
80 continuation, then the next time we enter it, we'll get an error.
81 It's a string port anyway, so there's no advantage to closing it
84 scm_close_port (port);
93 return gh_list (ly_symbol2scm ("quote"), s, SCM_UNDEFINED);
98 ly_symbol2scm(const char *s)
100 return gh_symbol2scm ((char *)s);
104 ly_symbol2string (SCM s)
106 assert (gh_symbol_p (s));
107 return String((Byte*)SCM_CHARS (s), (int) SCM_LENGTH(s));
112 gulp_file_to_string (String fn)
114 String s = global_path.find (fn);
117 String e = _f ("can't find file: `%s'", fn);
119 e += _f ("(load path: `%s')", global_path.str ());
122 else if (verbose_global_b)
123 progress_indication ("[" + s );
126 Simple_file_storage f(s);
127 String result (f.ch_C());
128 if (verbose_global_b)
129 progress_indication ("]");
134 ly_gulp_file (SCM fn)
136 return ly_str02scm (gulp_file_to_string (ly_scm2string (fn)).ch_C());
141 Read a file, and shove it down GUILE. GUILE also has file read
142 functions, but you can't fiddle with the path of those.
145 read_lily_scm_file (String fn)
147 gh_eval_str ((char *) gulp_file_to_string (fn).ch_C());
151 // maybe gdb 5.0 becomes quicker if it doesn't do fancy C++ typing?
153 ly_display_scm (SCM s)
161 ly_scm2string (SCM s)
163 assert (gh_string_p (s));
165 char * p = gh_scm2newstr (s , &len);
174 index_cell (SCM s, Direction d)
177 return (d == LEFT) ? gh_car (s) : gh_cdr (s);
181 index_set_cell (SCM s, Direction d, SCM v)
193 assert (gh_string_p (str));
194 warning ("lily-guile: " + ly_scm2string (str));
203 int i = gh_scm2int (s);
204 return (i>= -1 && i <= 1) ? SCM_BOOL_T : SCM_BOOL_F;
211 typedef void (*Void_fptr)();
212 Array<Void_fptr> *scm_init_funcs_;
214 void add_scm_init_func (void (*f)())
216 if (!scm_init_funcs_)
217 scm_init_funcs_ = new Array<Void_fptr>;
219 scm_init_funcs_->push (f);
225 for (int i=scm_init_funcs_->size() ; i--;)
226 (scm_init_funcs_->elem (i)) ();
229 unsigned int ly_scm_hash (SCM s)
231 return scm_ihashv (s, ~1u);
241 int i = gh_scm2int (s);
242 return i>= -1 && i <= 1;
250 return (Direction) gh_scm2int (s);
254 ly_scm2interval (SCM p)
256 return Interval (gh_scm2double (gh_car (p)),
257 gh_scm2double (gh_cdr (p)));
261 ly_interval2scm (Interval i)
263 return gh_cons (gh_double2scm (i[LEFT]),
264 gh_double2scm (i[RIGHT]));
271 return gh_boolean_p (s) && gh_scm2bool (s);
275 Appendable list L: the cdr contains the list, the car the last cons
281 SCM s = gh_cons (SCM_EOL, SCM_EOL);
288 appendable_list_append (SCM l, SCM elt)
290 SCM newcons = gh_cons (elt, SCM_EOL);
292 gh_set_cdr_x (gh_car (l), newcons);
293 gh_set_car_x (l, newcons);
298 ly_offset2scm (Offset o)
300 return gh_cons (gh_double2scm (o[X_AXIS]), gh_double2scm(o[Y_AXIS]));
304 ly_scm2offset (SCM s)
306 return Offset (gh_scm2double (gh_car (s)),
307 gh_scm2double (gh_cdr (s)));
313 char const * cp = "unknown";
314 if (gh_number_p (exp))
318 else if (gh_string_p (exp))
322 else if (gh_procedure_p (exp))
326 else if (gh_boolean_p (exp))
330 else if (gh_pair_p (exp))
335 return ly_str02scm (cp);
339 convert without too many decimals, and leave a space at the end.
344 ly_number2string (SCM s)
346 assert (gh_number_p (s));
348 char str[100]; // ugh.
350 if (scm_integer_p (s) == SCM_BOOL_F)
352 Real r (gh_scm2double (s));
354 if (isinf (r) || isnan (r))
356 programming_error ("Infinity or NaN encountered while converting Real number; setting to zero.");
360 sprintf (str, "%8.4f ", r);
364 sprintf (str, "%d ", gh_scm2int (s));
367 return gh_str02scm (str);
371 Undef this to see if GUILE GC is causing too many swaps.
377 #include <libguile/gc.h>
380 greet_sweep (void *dummy1, void *dummy2, void *dummy3)
382 fprintf(stderr, "entering sweep\n");
386 wave_sweep_goodbye (void *dummy1, void *dummy2, void *dummy3)
388 fprintf(stderr, "leaving sweep\n");
395 return SCM_UNDEFINED;
402 scm_make_gsubr ("ly-warn", 1, 0, 0, (SCM(*)())ly_warning);
403 scm_make_gsubr ("ly-gulp-file", 1,0, 0, (SCM(*)())ly_gulp_file);
404 scm_make_gsubr ("dir?", 1,0, 0, (SCM(*)())ly_isdir_p);
405 scm_make_gsubr ("undefd", 0,0, 0, (SCM(*)())undefd);
406 scm_make_gsubr ("ly-number->string", 1, 0,0, (SCM(*)()) ly_number2string);
410 scm_c_hook_add (&scm_before_mark_c_hook, greet_sweep, 0, 0);
411 scm_c_hook_add (&scm_before_sweep_c_hook, wave_sweep_goodbye, 0, 0);
415 ADD_SCM_INIT_FUNC(funcs, init_functions);
422 return gh_cons (ly_deep_copy (gh_car (l)), ly_deep_copy (gh_cdr (l)));