2 lily-guile.cc -- implement assorted Guile bindings
4 source file of the GNU LilyPond music typesetter
6 (c) 1998--2004 Jan Nieuwenhuizen <janneke@gnu.org>
7 Han-Wen Nienhuys <hanwen@cs.uu.nl>
10 #include <math.h> /* isinf */
12 #include "lily-guile.hh"
17 #include "dimensions.hh"
21 source-file.hh includes cmath which undefines isinf and isnan
24 inline int my_isinf (Real r) { return isinf (r); }
25 inline int my_isnan (Real r) { return isnan (r); }
29 LY_DEFINE (ly_gulp_file, "ly:gulp-file",
31 "Read the file @var{name}, and return its contents in a string. "
32 "The file is looked up using the search path.")
34 SCM_ASSERT_TYPE (scm_is_string (name), name, SCM_ARG1, __FUNCTION__, "string");
35 String contents = gulp_file_to_string (ly_scm2string (name), true);
36 return scm_from_locale_stringn (contents.get_str0 (), contents.length ());
39 LY_DEFINE (ly_warn, "ly:warn",
40 1, 0, 1, (SCM str, SCM rest),
41 "Scheme callable function to issue the warning @code{msg}. "
42 "The message is formatted with @code{format} and @code{rest}.")
44 SCM_ASSERT_TYPE (scm_is_string (str), str, SCM_ARG1, __FUNCTION__, "string");
45 progress_indication ("\n");
47 str = scm_simple_format (SCM_BOOL_F, str, rest);
48 warning (ly_scm2string (str));
49 return SCM_UNSPECIFIED;
52 LY_DEFINE (ly_programming_error, "ly:programming-error",
53 1, 0, 1, (SCM str, SCM rest),
54 "Scheme callable function to issue the warning @code{msg}. "
55 "The message is formatted with @code{format} and @code{rest}.")
57 SCM_ASSERT_TYPE (scm_is_string (str), str, SCM_ARG1, __FUNCTION__, "string");
58 progress_indication ("\n");
60 str = scm_simple_format (SCM_BOOL_F, str, rest);
61 programming_error (ly_scm2string (str));
62 return SCM_UNSPECIFIED;
65 LY_DEFINE (ly_dir_p, "ly:dir?",
67 "type predicate. A direction is @code{-1}, @code{0} or "
68 "@code{1}, where @code{-1} represents "
69 "left or down and @code{1} represents right or up.")
71 if (scm_is_number (s))
73 int i = scm_to_int (s);
74 return (i>= -1 && i <= 1) ? SCM_BOOL_T : SCM_BOOL_F;
79 LY_DEFINE (ly_assoc_get, "ly:assoc-get",
81 (SCM key, SCM alist, SCM default_value),
82 "Return value if KEY in ALIST, else DEFAULT-VALUE "
83 "(or #f if not specified).")
85 SCM handle = scm_assoc (key, alist);
87 if (default_value == SCM_UNDEFINED)
88 default_value = SCM_BOOL_F;
90 if (scm_is_pair (handle))
91 return scm_cdr (handle);
97 LY_DEFINE (ly_number2string, "ly:number->string",
99 "Convert @var{num} to a string without generating many decimals.")
101 SCM_ASSERT_TYPE (scm_is_number (s), s, SCM_ARG1, __FUNCTION__, "number");
103 char str[400]; // ugh.
105 if (scm_exact_p (s) == SCM_BOOL_F)
107 Real r (scm_to_double (s));
109 if (my_isinf (r) || my_isnan (r))
111 if (isinf (r) || isnan (r))
114 programming_error ("Infinity or NaN encountered while converting Real number; setting to zero.");
118 sprintf (str, "%08.4f", r);
121 sprintf (str, "%d", scm_to_int (s));
123 return scm_makfrom0str (str);
128 LY_DEFINE (ly_version, "ly:version", 0, 0, 0, (),
129 "Return the current lilypond version as a list, e.g. @code{(1 3 127 uu1)}. ")
131 char const* vs = "\'(" MAJOR_VERSION " " MINOR_VERSION " " PATCH_LEVEL " " MY_PATCH_LEVEL ")" ;
133 return scm_c_eval_string ((char*)vs);
136 LY_DEFINE (ly_unit, "ly:unit", 0, 0, 0, (),
137 "Return the unit used for lengths as a string.")
139 return scm_makfrom0str (INTERNAL_UNIT);
144 LY_DEFINE (ly_dimension_p, "ly:dimension?", 1, 0, 0, (SCM d),
145 "Return @var{d} is a number. Used to distinguish length "
146 "variables from normal numbers.")
148 return scm_number_p (d);
154 LY_DEFINE (ly_protects, "ly:protects",
156 "Return hash of protected objects.")
161 LY_DEFINE (ly_gettext, "ly:gettext",
162 1, 0, 0, (SCM string),
165 SCM_ASSERT_TYPE (scm_is_string (string), string, SCM_ARG1,
166 __FUNCTION__, "string");
167 return scm_makfrom0str (gettext (scm_i_string_chars (string)));
173 LY_DEFINE (ly_output_backend, "ly:output-backend",
175 "Return name of output backend.")
177 return scm_makfrom0str (output_backend_global.to_str0 ());
181 LY_DEFINE (ly_output_formats, "ly:output-formats",
183 "Formats passed to --format as a list of strings, "
184 "used for the output.")
186 Array<String> output_formats = split_string (output_format_global, ',');
189 int output_formats_count = output_formats.size ();
190 for (int i = 0; i < output_formats_count; i ++)
191 lst = scm_cons (scm_makfrom0str (output_formats[i].to_str0 ()), lst);