2 lily-guile.cc -- implement assorted Guile bindings
4 source file of the GNU LilyPond music typesetter
6 (c) 1998--2005 Jan Nieuwenhuizen <janneke@gnu.org>
7 Han-Wen Nienhuys <hanwen@cs.uu.nl>
12 #include <math.h> /* isinf */
14 #include <libintl.h> // gettext on macos x
16 #include "libc-extension.hh"
17 #include "lily-guile.hh"
22 #include "dimensions.hh"
26 source-file.hh includes cmath which undefines isinf and isnan
29 inline int my_isinf (Real r) { return isinf (r); }
30 inline int my_isnan (Real r) { return isnan (r); }
35 Ugh. Gulped file is copied twice. (maybe thrice if you count stdio
38 LY_DEFINE (ly_gulp_file, "ly:gulp-file",
40 "Read the file @var{name}, and return its contents in a string. "
41 "The file is looked up using the search path.")
43 SCM_ASSERT_TYPE (scm_is_string (name), name, SCM_ARG1, __FUNCTION__, "string");
44 String contents = gulp_file_to_string (ly_scm2string (name), true);
45 return scm_from_locale_stringn (contents.get_str0 (), contents.length ());
48 LY_DEFINE (ly_warn, "ly:warn",
49 1, 0, 1, (SCM str, SCM rest),
50 "Scheme callable function to issue the warning @code{msg}. "
51 "The message is formatted with @code{format} and @code{rest}.")
53 SCM_ASSERT_TYPE (scm_is_string (str), str, SCM_ARG1, __FUNCTION__, "string");
54 progress_indication ("\n");
56 str = scm_simple_format (SCM_BOOL_F, str, rest);
57 warning (ly_scm2string (str));
58 return SCM_UNSPECIFIED;
61 LY_DEFINE (ly_programming_error, "ly:programming-error",
62 1, 0, 1, (SCM str, SCM rest),
63 "Scheme callable function to issue the warning @code{msg}. "
64 "The message is formatted with @code{format} and @code{rest}.")
66 SCM_ASSERT_TYPE (scm_is_string (str), str, SCM_ARG1, __FUNCTION__, "string");
67 progress_indication ("\n");
69 str = scm_simple_format (SCM_BOOL_F, str, rest);
70 programming_error (ly_scm2string (str));
71 return SCM_UNSPECIFIED;
74 LY_DEFINE (ly_dir_p, "ly:dir?",
76 "type predicate. A direction is @code{-1}, @code{0} or "
77 "@code{1}, where @code{-1} represents "
78 "left or down and @code{1} represents right or up.")
80 if (scm_is_number (s))
82 int i = scm_to_int (s);
83 return (i>= -1 && i <= 1) ? SCM_BOOL_T : SCM_BOOL_F;
88 LY_DEFINE (ly_assoc_get, "ly:assoc-get",
90 (SCM key, SCM alist, SCM default_value),
91 "Return value if KEY in ALIST, else DEFAULT-VALUE "
92 "(or #f if not specified).")
94 SCM handle = scm_assoc (key, alist);
96 if (default_value == SCM_UNDEFINED)
97 default_value = SCM_BOOL_F;
99 if (scm_is_pair (handle))
100 return scm_cdr (handle);
102 return default_value;
106 LY_DEFINE (ly_number2string, "ly:number->string",
108 "Convert @var{num} to a string without generating many decimals.")
110 SCM_ASSERT_TYPE (scm_is_number (s), s, SCM_ARG1, __FUNCTION__, "number");
112 char str[400]; // ugh.
114 if (scm_exact_p (s) == SCM_BOOL_F)
116 Real r (scm_to_double (s));
118 if (my_isinf (r) || my_isnan (r))
120 if (isinf (r) || isnan (r))
123 programming_error ("Infinity or NaN encountered while converting Real number; setting to zero.");
127 snprintf (str, sizeof (str), "%08.4f", r);
130 snprintf (str, sizeof (str), "%d", scm_to_int (s));
132 return scm_makfrom0str (str);
137 LY_DEFINE (ly_version, "ly:version", 0, 0, 0, (),
138 "Return the current lilypond version as a list, e.g. @code{(1 3 127 uu1)}. ")
140 char const* vs = "\'(" MAJOR_VERSION " " MINOR_VERSION " " PATCH_LEVEL " " MY_PATCH_LEVEL ")" ;
142 return scm_c_eval_string ((char*)vs);
145 LY_DEFINE (ly_unit, "ly:unit", 0, 0, 0, (),
146 "Return the unit used for lengths as a string.")
148 return scm_makfrom0str (INTERNAL_UNIT);
153 LY_DEFINE (ly_dimension_p, "ly:dimension?", 1, 0, 0, (SCM d),
154 "Return @var{d} is a number. Used to distinguish length "
155 "variables from normal numbers.")
157 return scm_number_p (d);
163 LY_DEFINE (ly_protects, "ly:protects",
165 "Return hash of protected objects.")
170 LY_DEFINE (ly_gettext, "ly:gettext",
171 1, 0, 0, (SCM string),
174 SCM_ASSERT_TYPE (scm_is_string (string), string, SCM_ARG1,
175 __FUNCTION__, "string");
176 return scm_makfrom0str (gettext (scm_i_string_chars (string)));
182 LY_DEFINE (ly_output_backend, "ly:output-backend",
184 "Return name of output backend.")
186 return scm_makfrom0str (output_backend_global.to_str0 ());
190 LY_DEFINE (ly_output_formats, "ly:output-formats",
192 "Formats passed to --format as a list of strings, "
193 "used for the output.")
195 Array<String> output_formats = split_string (output_format_global, ',');
198 int output_formats_count = output_formats.size ();
199 for (int i = 0; i < output_formats_count; i ++)
200 lst = scm_cons (scm_makfrom0str (output_formats[i].to_str0 ()), lst);