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 <libintl.h> /* gettext on MacOS X */
13 #include <math.h> /* isinf */
15 #include <string.h> /* memset */
16 #include <wchar.h> /* wcrtomb */
18 #include "libc-extension.hh"
19 #include "lily-guile.hh"
24 #include "dimensions.hh"
28 source-file.hh includes cmath which undefines isinf and isnan
31 inline int my_isinf (Real r) { return isinf (r); }
32 inline int my_isnan (Real r) { return isnan (r); }
37 Ugh. Gulped file is copied twice. (maybe thrice if you count stdio
40 LY_DEFINE (ly_gulp_file, "ly:gulp-file",
42 "Read the file @var{name}, and return its contents in a string. "
43 "The file is looked up using the search path.")
45 SCM_ASSERT_TYPE (scm_is_string (name), name, SCM_ARG1, __FUNCTION__, "string");
46 String contents = gulp_file_to_string (ly_scm2string (name), true);
47 return scm_from_locale_stringn (contents.get_str0 (), contents.length ());
50 LY_DEFINE (ly_warn, "ly:warn",
51 1, 0, 1, (SCM str, SCM rest),
52 "Scheme callable function to issue the warning @code{msg}. "
53 "The message is formatted with @code{format} and @code{rest}.")
55 SCM_ASSERT_TYPE (scm_is_string (str), str, SCM_ARG1, __FUNCTION__, "string");
56 progress_indication ("\n");
58 str = scm_simple_format (SCM_BOOL_F, str, rest);
59 warning (ly_scm2string (str));
60 return SCM_UNSPECIFIED;
63 LY_DEFINE (ly_programming_error, "ly:programming-error",
64 1, 0, 1, (SCM str, SCM rest),
65 "Scheme callable function to issue the warning @code{msg}. "
66 "The message is formatted with @code{format} and @code{rest}.")
68 SCM_ASSERT_TYPE (scm_is_string (str), str, SCM_ARG1, __FUNCTION__, "string");
69 progress_indication ("\n");
71 str = scm_simple_format (SCM_BOOL_F, str, rest);
72 programming_error (ly_scm2string (str));
73 return SCM_UNSPECIFIED;
76 LY_DEFINE (ly_dir_p, "ly:dir?",
78 "type predicate. A direction is @code{-1}, @code{0} or "
79 "@code{1}, where @code{-1} represents "
80 "left or down and @code{1} represents right or up.")
82 if (scm_is_number (s))
84 int i = scm_to_int (s);
85 return (i>= -1 && i <= 1) ? SCM_BOOL_T : SCM_BOOL_F;
90 LY_DEFINE (ly_assoc_get, "ly:assoc-get",
92 (SCM key, SCM alist, SCM default_value),
93 "Return value if KEY in ALIST, else DEFAULT-VALUE "
94 "(or #f if not specified).")
96 SCM handle = scm_assoc (key, alist);
98 if (default_value == SCM_UNDEFINED)
99 default_value = SCM_BOOL_F;
101 if (scm_is_pair (handle))
102 return scm_cdr (handle);
104 return default_value;
107 LY_DEFINE (ly_number2string, "ly:number->string",
109 "Convert @var{num} to a string without generating many decimals.")
111 SCM_ASSERT_TYPE (scm_is_number (s), s, SCM_ARG1, __FUNCTION__, "number");
113 char str[400]; // ugh.
115 if (scm_exact_p (s) == SCM_BOOL_F)
117 Real r (scm_to_double (s));
119 if (my_isinf (r) || my_isnan (r))
121 if (isinf (r) || isnan (r))
124 programming_error ("Infinity or NaN encountered while converting Real number; setting to zero.");
128 snprintf (str, sizeof (str), "%08.4f", r);
131 snprintf (str, sizeof (str), "%d", scm_to_int (s));
133 return scm_makfrom0str (str);
136 LY_DEFINE (ly_version, "ly:version", 0, 0, 0, (),
137 "Return the current lilypond version as a list, e.g. @code{(1 3 127 uu1)}. ")
139 char const* vs = "\'(" MAJOR_VERSION " " MINOR_VERSION " " PATCH_LEVEL " " MY_PATCH_LEVEL ")" ;
141 return scm_c_eval_string ((char*)vs);
144 LY_DEFINE (ly_unit, "ly:unit", 0, 0, 0, (),
145 "Return the unit used for lengths as a string.")
147 return scm_makfrom0str (INTERNAL_UNIT);
150 LY_DEFINE (ly_dimension_p, "ly:dimension?", 1, 0, 0, (SCM d),
151 "Return @var{d} is a number. Used to distinguish length "
152 "variables from normal numbers.")
154 return scm_number_p (d);
160 LY_DEFINE (ly_protects, "ly:protects",
162 "Return hash of protected objects.")
167 LY_DEFINE (ly_gettext, "ly:gettext",
168 1, 0, 0, (SCM string),
171 SCM_ASSERT_TYPE (scm_is_string (string), string, SCM_ARG1,
172 __FUNCTION__, "string");
173 return scm_makfrom0str (gettext (scm_i_string_chars (string)));
176 LY_DEFINE (ly_output_backend, "ly:output-backend",
178 "Return name of output backend.")
180 return scm_makfrom0str (output_backend_global.to_str0 ());
183 LY_DEFINE (ly_output_formats, "ly:output-formats",
185 "Formats passed to --format as a list of strings, "
186 "used for the output.")
188 Array<String> output_formats = split_string (output_format_global, ',');
191 int output_formats_count = output_formats.size ();
192 for (int i = 0; i < output_formats_count; i ++)
193 lst = scm_cons (scm_makfrom0str (output_formats[i].to_str0 ()), lst);
198 LY_DEFINE (ly_wchar_to_utf_8, "ly:wide-char->utf-8",
200 "Encode the Unicode codepoint @var{wc} as UTF-8")
204 SCM_ASSERT_TYPE (scm_is_integer (wc), wc, SCM_ARG1, __FUNCTION__, "integer");
205 wchar_t wide_char = (wchar_t) scm_to_int (wc);
208 memset (&state, '\0', sizeof (state));
209 memset (buf, '\0', sizeof (buf));
211 wcrtomb (buf, wide_char, &state);
213 return scm_makfrom0str (buf);