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_x (form);
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 Read a file, and shove it down GUILE. GUILE also has file read
113 functions, but you can't fiddle with the path of those.
116 read_lily_scm_file (String fn)
118 String s = global_path.find (fn);
121 String e = _f ("can't find file: `%s'", fn);
123 e += _f ("(load path: `%s')", global_path.str ());
127 progress_indication ("[" + s);
130 Simple_file_storage f(s);
132 gh_eval_str ((char *) f.ch_C());
133 progress_indication ("]");
138 ly_gulp_file (SCM name)
140 String fn (ly_scm2string (name));
141 String s = global_path.find (fn);
144 String e = _f ("can't find file: `%s'", fn);
146 e += _f ("(load path: `%s')", global_path.str ());
150 progress_indication ("[" + s );
153 Simple_file_storage f(s);
154 SCM result = ly_str02scm (f.ch_C());
155 progress_indication ("]");
160 ly_display_scm (SCM s)
167 ly_scm2string (SCM s)
169 assert (gh_string_p (s));
171 char * p = gh_scm2newstr (s , &len);
180 index_cell (SCM s, Direction d)
183 return (d == LEFT) ? gh_car (s) : gh_cdr (s);
187 index_set_cell (SCM s, Direction d, SCM v)
199 assert (gh_string_p (str));
200 warning ("lily-guile: " + ly_scm2string (str));
209 int i = gh_scm2int (s);
210 return (i>= -1 && i <= 1) ? SCM_BOOL_T : SCM_BOOL_F;
217 typedef void (*Void_fptr)();
218 Array<Void_fptr> *scm_init_funcs_;
220 void add_scm_init_func (void (*f)())
222 if (!scm_init_funcs_)
223 scm_init_funcs_ = new Array<Void_fptr>;
225 scm_init_funcs_->push (f);
231 for (int i=scm_init_funcs_->size() ; i--;)
232 (scm_init_funcs_->elem (i)) ();
235 unsigned int ly_scm_hash (SCM s)
237 return scm_ihashv (s, ~1u);
247 int i = gh_scm2int (s);
248 return i>= -1 && i <= 1;
256 return (Direction) gh_scm2int (s);
260 ly_scm2interval (SCM p)
262 return Interval (gh_scm2double (gh_car (p)),
263 gh_scm2double (gh_cdr (p)));
267 ly_interval2scm (Interval i)
269 return gh_cons (gh_double2scm (i[LEFT]),
270 gh_double2scm (i[RIGHT]));
277 return gh_boolean_p (s) && gh_scm2bool (s);
281 Appendable list L: the cdr contains the list, the car the last cons
287 SCM s = gh_cons (SCM_EOL, SCM_EOL);
294 appendable_list_append (SCM l, SCM elt)
296 SCM newcons = gh_cons (elt, SCM_EOL);
298 gh_set_cdr_x (gh_car (l), newcons);
299 gh_set_car_x (l, newcons);
304 ly_offset2scm (Offset o)
306 return gh_cons (gh_double2scm (o[X_AXIS]), gh_double2scm(o[Y_AXIS]));
310 ly_scm2offset (SCM s)
312 return Offset (gh_scm2double (gh_car (s)),
313 gh_scm2double (gh_cdr (s)));
319 char const * cp = "unknown";
320 if (gh_number_p (exp))
324 else if (gh_string_p (exp))
328 else if (gh_procedure_p (exp))
332 else if (gh_boolean_p (exp))
336 else if (gh_pair_p (exp))
341 return ly_str02scm (cp);
345 convert without too many decimals, and leave a space at the end.
350 ly_number2string (SCM s)
352 assert (gh_number_p (s));
354 char str[100]; // ugh.
356 if (scm_integer_p (s))
358 Real r (gh_scm2double (s));
360 if (isinf (r) || isnan (r))
362 programming_error ("Infinity or NaN encountered while converting Real number; setting to zero.");
366 sprintf (str, "%8.4f ", r);
370 sprintf (str, "%d ", gh_scm2int (s));
373 return gh_str02scm (str);
377 Undef this to see if GUILE GC is causing too many swaps.
383 #include <libguile/gc.h>
386 greet_sweep (void *dummy1, void *dummy2, void *dummy3)
388 fprintf(stderr, "entering sweep\n");
392 wave_sweep_goodbye (void *dummy1, void *dummy2, void *dummy3)
394 fprintf(stderr, "leaving sweep\n");
401 scm_make_gsubr ("ly-warn", 1, 0, 0, (SCM(*)(...))ly_warning);
402 scm_make_gsubr ("ly-gulp-file", 1,0, 0, (SCM(*)(...))ly_gulp_file);
403 scm_make_gsubr ("dir?", 1,0, 0, (SCM(*)(...))ly_isdir_p);
404 scm_make_gsubr ("ly-number->string", 1, 0,0, (SCM(*)(...)) ly_number2string);
408 scm_c_hook_add (&scm_before_mark_c_hook, greet_sweep, 0, 0);
409 scm_c_hook_add (&scm_before_sweep_c_hook, wave_sweep_goodbye, 0, 0);
414 ADD_SCM_INIT_FUNC(funcs, init_functions);