2 lily-guile.cc -- implement assorted guile functions
4 source file of the GNU LilyPond music typesetter
6 (c) 1998--1999 Jan Nieuwenhuizen <janneke@gnu.org>
8 Han-Wen Nienhuys <hanwen@cs.uu.nl>
15 #include "libc-extension.hh"
16 #include "lily-guile.hh"
18 #include "simple-file-storage.hh"
19 #include "file-path.hh"
23 ly_ch_C_to_scm (char const*c)
25 // this all really sucks, guile should take char const* arguments!
26 return gh_str02scm ((char*)c);
30 ly_ch_C_eval_scm (char const*c)
32 // this all really sucks, guile should take char const* arguments!
33 return gh_eval_str ((char*)c);
38 Pass string to scm parser, evaluate one expression.
39 Return result value and #chars read.
41 Thanks to Gary Houston <ghouston@freewire.co.uk>
43 Need guile-1.3.4 (>1.3 anyway) for ftell on str ports -- jcn
46 ly_parse_scm (char const* s, int* n)
48 SCM str = gh_str02scm ((char*)s);
49 SCM port = scm_mkstrport (SCM_INUM0, str, SCM_OPN | SCM_RDNG,
51 SCM from = scm_ftell (port);
54 SCM answer = SCM_UNSPECIFIED;
56 /* Read expression from port */
57 if (!SCM_EOF_OBJECT_P (form = scm_read (port)))
58 answer = scm_eval_x (form);
60 SCM to = scm_ftell (port);
61 *n = gh_scm2int (to) - gh_scm2int (from);
63 /* Don't close the port here; if we re-enter this function via a
64 continuation, then the next time we enter it, we'll get an error.
65 It's a string port anyway, so there's no advantage to closing it
72 scm_m_quote doesn't use any env, but needs one for a good signature in GUILE.
78 return scm_m_quote (scm_cons2 (SCM_EOL, s, SCM_EOL) ,SCM_EOL); // apparently env arg is ignored.
82 See: libguile/symbols.c
85 scm_string_to_symbol(s)
89 ly_symbol (String name)
91 return gh_car (scm_intern ((char*)name.ch_C(), name.length_i()));
95 symbol_to_string (SCM s)
97 return String((Byte*)SCM_CHARS (s), (int) SCM_LENGTH(s));
101 ly_set_scm (String name, SCM val)
103 return scm_sysintern ((char*)name.ch_C(), val);
108 Read a file, and shove it down GUILE. GUILE also has file read
109 functions, but you can't fiddle with the path of those.
112 read_lily_scm_file (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 ());
126 Simple_file_storage f(s);
128 ly_ch_C_eval_scm ((char *) f.ch_C());
129 *mlog << "]" << flush;
134 ly_gulp_file (SCM name)
136 String fn (ly_scm2string (name));
137 String s = global_path.find (fn);
140 String e = _f ("Can't find file: `%s'", fn);
142 e += _f ("(load path: `%s')", global_path.str ());
149 Simple_file_storage f(s);
150 return ly_ch_C_to_scm (f.ch_C());
154 ly_display_scm (SCM s)
161 ly_scm2string (SCM s)
164 char * p = gh_scm2newstr (s , &len);
173 index_cell (SCM s, Direction d)
176 return (d == LEFT) ? SCM_CAR (s) : SCM_CDR (s);
181 array_to_list (SCM *a , int l)
184 for (int i= l; i--; )
186 list = gh_cons (a[i], list);
194 assert (gh_string_p (str));
195 warning ("lily-guile: " + ly_scm2string (str));
202 scm_make_gsubr ("ly-warn", 1, 0, 0, (SCM(*)(...))ly_warning);
203 scm_make_gsubr ("ly-gulp-file", 1,0, 0, (SCM(*)(...))ly_gulp_file);
206 extern void init_symbols ();
207 extern void init_smobs (); // guh -> .hh