source file of the GNU LilyPond music typesetter
- (c) 1998 Jan Nieuwenhuizen <janneke@gnu.org>
+ (c) 1998--2000 Jan Nieuwenhuizen <janneke@gnu.org>
+
+ Han-Wen Nienhuys <hanwen@cs.uu.nl>
*/
+
#include <stdio.h>
+#include <stdlib.h>
+#include <math.h> // isinf
+
#include "libc-extension.hh"
#include "lily-guile.hh"
#include "main.hh"
+#include "simple-file-storage.hh"
+#include "file-path.hh"
+#include "debug.hh"
+#include "direction.hh"
+#include "offset.hh"
+#include "interval.hh"
+
+SCM
+ly_str02scm (char const*c)
+{
+ // this all really sucks, guile should take char const* arguments!
+ return gh_str02scm ((char*)c);
+}
-#ifdef __cplusplus
-extern "C" {
-#endif
+
+/*
+ Pass string to scm parser, evaluate one expression.
+ Return result value and #chars read.
+
+ Thanks to Gary Houston <ghouston@freewire.co.uk>
+
+ Need guile-1.3.4 (>1.3 anyway) for ftell on str ports -- jcn
+*/
SCM
-ly_append (SCM a, SCM b)
+ly_parse_scm (char const* s, int* n)
{
- return gh_call2 (gh_eval_str ("append"), a, b);
+ SCM str = gh_str02scm ((char*)s);
+ SCM port = scm_mkstrport (SCM_INUM0, str, SCM_OPN | SCM_RDNG,
+ "scm_eval_0str");
+ SCM from = scm_ftell (port);
+
+ SCM form;
+ SCM answer = SCM_UNSPECIFIED;
+
+ /* Read expression from port */
+ if (!SCM_EOF_OBJECT_P (form = scm_read (port)))
+ answer = scm_eval_x (form);
+
+ /*
+ After parsing
+
+ (begin (foo 1 2))
+
+ all seems fine, but after parsing
+
+ (foo 1 2)
+
+ read_buf has been advanced to read_pos - 1,
+ so that scm_ftell returns 1, instead of #parsed chars
+ */
+
+ /*
+ urg: reset read_buf for scm_ftell
+ shouldn't scm_read () do this for us?
+ */
+ scm_fill_input (port);
+ SCM to = scm_ftell (port);
+ *n = gh_scm2int (to) - gh_scm2int (from);
+
+ /* Don't close the port here; if we re-enter this function via a
+ continuation, then the next time we enter it, we'll get an error.
+ It's a string port anyway, so there's no advantage to closing it
+ early.
+
+ scm_close_port (port);
+ */
+
+ return answer;
}
SCM
-ly_list1 (SCM a)
+ly_quote_scm (SCM s)
{
- return gh_call1 (gh_eval_str ("list"), a);
+ return gh_list (ly_symbol2scm ("quote"), s, SCM_UNDEFINED);
}
+
SCM
-ly_list2(SCM a, SCM b)
+ly_symbol2scm(const char *s)
{
- return gh_call2 (gh_eval_str ("list"), a, b);
+ return gh_symbol2scm ((char *)s);
+}
+
+String
+ly_symbol2string (SCM s)
+{
+ assert (gh_symbol_p (s));
+ return String((Byte*)SCM_CHARS (s), (int) SCM_LENGTH(s));
+}
+
+
+/**
+ Read a file, and shove it down GUILE. GUILE also has file read
+ functions, but you can't fiddle with the path of those.
+ */
+void
+read_lily_scm_file (String fn)
+{
+ String s = global_path.find (fn);
+ if (s == "")
+ {
+ String e = _f ("can't find file: `%s'", fn);
+ e += " ";
+ e += _f ("(load path: `%s')", global_path.str ());
+ error (e);
+ }
+ else
+ progress_indication ("[" + s);
+
+
+ Simple_file_storage f(s);
+
+ gh_eval_str ((char *) f.ch_C());
+ progress_indication ("]");
}
+
SCM
-ly_quote ()
+ly_gulp_file (SCM name)
+{
+ String fn (ly_scm2string (name));
+ String s = global_path.find (fn);
+ if (s == "")
+ {
+ String e = _f ("can't find file: `%s'", fn);
+ e += " ";
+ e += _f ("(load path: `%s')", global_path.str ());
+ error (e);
+ }
+ else
+ progress_indication ("[" + s );
+
+
+ Simple_file_storage f(s);
+ SCM result = ly_str02scm (f.ch_C());
+ progress_indication ("]");
+ return result;
+}
+
+void
+ly_display_scm (SCM s)
+{
+ gh_display (s);
+ gh_newline ();
+}
+
+String
+ly_scm2string (SCM s)
{
- return gh_eval_str ("'quote");
+ assert (gh_string_p (s));
+ int len;
+ char * p = gh_scm2newstr (s , &len);
+
+ String r (p);
+
+ free (p);
+ return r;
}
SCM
-ly_eval (SCM a)
+index_cell (SCM s, Direction d)
{
- return gh_call1 (gh_eval_str ("eval"), a);
+ assert (d);
+ return (d == LEFT) ? gh_car (s) : gh_cdr (s);
}
SCM
-ly_lambda_o ()
+index_set_cell (SCM s, Direction d, SCM v)
+{
+ if (d == LEFT)
+ gh_set_car_x (s, v);
+ else if (d == RIGHT)
+ gh_set_cdr_x (s, v);
+ return s;
+}
+
+SCM
+ly_warning (SCM str)
{
- return gh_eval_str ("'(lambda (o))");
+ assert (gh_string_p (str));
+ warning ("lily-guile: " + ly_scm2string (str));
+ return SCM_BOOL_T;
}
SCM
-ly_func_o (char const* name)
+ly_isdir_p (SCM s)
+{
+ if (gh_number_p (s))
+ {
+ int i = gh_scm2int (s);
+ return (i>= -1 && i <= 1) ? SCM_BOOL_T : SCM_BOOL_F;
+ }
+ return SCM_BOOL_F;
+}
+
+
+
+typedef void (*Void_fptr)();
+Array<Void_fptr> *scm_init_funcs_;
+
+void add_scm_init_func (void (*f)())
{
- char buf[200];
- snprintf (buf, 200, "'(%s o)", name);
- return gh_eval_str (buf);
+ if (!scm_init_funcs_)
+ scm_init_funcs_ = new Array<Void_fptr>;
+
+ scm_init_funcs_->push (f);
}
-#ifdef __cplusplus
+void
+init_lily_guile ()
+{
+ for (int i=scm_init_funcs_->size() ; i--;)
+ (scm_init_funcs_->elem (i)) ();
}
-#endif
-SCM
-lambda_scm (String str, Array<int> args_arr)
+unsigned int ly_scm_hash (SCM s)
+{
+ return scm_ihashv (s, ~1u);
+}
+
+
+
+bool
+isdir_b (SCM s)
{
- if (str.empty_b ())
+ if (gh_number_p (s))
{
- str = "empty";
- args_arr.clear ();
+ int i = gh_scm2int (s);
+ return i>= -1 && i <= 1;
}
- SCM args_scm = SCM_EOL;
- for (int i = args_arr.size () - 1; i >= 0; i--)
- args_scm = gh_cons (gh_int2scm (args_arr[i]), args_scm);
- SCM scm =
- ly_append (ly_lambda_o (),
- ly_list1 (ly_append (ly_func_o (str.ch_l ()), args_scm)));
- return scm;
+ return false;
+}
+
+Direction
+to_dir (SCM s)
+{
+ return (Direction) gh_scm2int (s);
+}
+
+Interval
+ly_scm2interval (SCM p)
+{
+ return Interval (gh_scm2double (gh_car (p)),
+ gh_scm2double (gh_cdr (p)));
+}
+
+SCM
+ly_interval2scm (Interval i)
+{
+ return gh_cons (gh_double2scm (i[LEFT]),
+ gh_double2scm (i[RIGHT]));
+}
+
+
+bool
+to_boolean (SCM s)
+{
+ return gh_boolean_p (s) && gh_scm2bool (s);
+}
+
+/*
+ Appendable list L: the cdr contains the list, the car the last cons
+ in the list.
+ */
+SCM
+appendable_list ()
+{
+ SCM s = gh_cons (SCM_EOL, SCM_EOL);
+ gh_set_car_x (s, s);
+
+ return s;
+}
+
+void
+appendable_list_append (SCM l, SCM elt)
+{
+ SCM newcons = gh_cons (elt, SCM_EOL);
+
+ gh_set_cdr_x (gh_car (l), newcons);
+ gh_set_car_x (l, newcons);
+}
+
+
+SCM
+ly_offset2scm (Offset o)
+{
+ return gh_cons (gh_double2scm (o[X_AXIS]), gh_double2scm(o[Y_AXIS]));
+}
+
+Offset
+ly_scm2offset (SCM s)
+{
+ return Offset (gh_scm2double (gh_car (s)),
+ gh_scm2double (gh_cdr (s)));
}
SCM
-lambda_scm (String str, Array<Scalar> args_arr)
+ly_type (SCM exp)
{
- if (str.empty_b ())
+ char const * cp = "unknown";
+ if (gh_number_p (exp))
+ {
+ cp = "number";
+ }
+ else if (gh_string_p (exp))
+ {
+ cp = "string";
+ }
+ else if (gh_procedure_p (exp))
+ {
+ cp = "procedure";
+ }
+ else if (gh_boolean_p (exp))
+ {
+ cp = "boolean";
+ }
+ else if (gh_pair_p (exp))
{
- str = "empty";
- args_arr.clear ();
+ cp = "list";
}
- SCM args_scm = SCM_EOL;
- for (int i = args_arr.size () - 1; i >= 0; i--)
- args_scm = gh_cons (gh_str02scm (args_arr[i].ch_l ()), args_scm);
- SCM scm =
- ly_append (ly_lambda_o (),
- ly_list1 (ly_append (ly_func_o (str.ch_l ()), args_scm)));
- return scm;
+
+ return ly_str02scm (cp);
}
+/*
+ convert without too many decimals, and leave a space at the end.
+ */
+
+
SCM
-lambda_scm (String str, Array<Real> args_arr)
+ly_number2string (SCM s)
{
- if (str.empty_b ())
+ assert (gh_number_p (s));
+
+ char str[100]; // ugh.
+
+ if (scm_integer_p (s))
+ {
+ Real r (gh_scm2double (s));
+
+ if (isinf (r) || isnan (r))
+ {
+ programming_error ("Infinity or NaN encountered while converting Real number; setting to zero.");
+ r = 0.0;
+ }
+
+ sprintf (str, "%8.4f ", r);
+ }
+ else
{
- str = "empty";
- args_arr.clear ();
+ sprintf (str, "%d ", gh_scm2int (s));
}
- SCM args_scm = SCM_EOL;
- for (int i = args_arr.size () - 1; i >= 0; i--)
- args_scm = gh_cons (gh_double2scm (args_arr[i]), args_scm);
- SCM scm =
- ly_append (ly_lambda_o (),
- ly_list1 (ly_append (ly_func_o (str.ch_l ()), args_scm)));
- return scm;
+
+ return gh_str02scm (str);
+}
+
+#define TEST_GC
+
+#ifdef TEST_GC
+#include <libguile/gc.h>
+
+static void *
+greet_sweep (void *dummy1, void *dummy2, void *dummy3)
+{
+ fprintf(stderr, "entering sweep\n");
+}
+
+static void *
+wave_sweep_goodbye (void *dummy1, void *dummy2, void *dummy3)
+{
+ fprintf(stderr, "leaving sweep\n");
}
+#endif
+
+static void
+init_functions ()
+{
+ scm_make_gsubr ("ly-warn", 1, 0, 0, (SCM(*)(...))ly_warning);
+ scm_make_gsubr ("ly-gulp-file", 1,0, 0, (SCM(*)(...))ly_gulp_file);
+ scm_make_gsubr ("dir?", 1,0, 0, (SCM(*)(...))ly_isdir_p);
+ scm_make_gsubr ("ly-number->string", 1, 0,0, (SCM(*)(...)) ly_number2string);
+
+#ifdef TEST_GC
+ scm_c_hook_add (&scm_before_mark_c_hook, greet_sweep, 0, 0);
+ scm_c_hook_add (&scm_before_sweep_c_hook, wave_sweep_goodbye, 0, 0);
+#endif
+
+}
+ADD_SCM_INIT_FUNC(funcs, init_functions);