2 scm-option.cc -- implement option setting from Scheme
4 source file of the GNU LilyPond music typesetter
6 (c) 2001--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
11 #include "parse-scm.hh"
13 #include "lily-guile.hh"
14 #include "scm-option.hh"
19 This interface to option setting is meant for setting options are
20 useful to a limited audience. The reason for this interface is that
21 making command line options clutters up the command-line option name
25 preferably, also dont use TESTING_LEVEL_GLOBAL, since it defeats
26 another purpose of this very versatile interface, which is to
27 support multiple debug/testing options concurrently.
32 /* Write midi as formatted ascii stream? */
33 bool midi_debug_global_b;
35 /* General purpose testing flag */
36 int testing_level_global;
39 Backwards compatibility.
41 bool lily_1_8_relative = false;
42 bool lily_1_8_compatibility_used = false;
45 crash if internally the wrong type is used for a grob property.
47 bool internal_type_checking_global_b;
51 What is this function for ?
53 LY_DEFINE (ly_option_usage, "ly:option-usage", 0, 0, 0, (SCM),
54 "Print ly:set-option usage")
56 printf ( _("lilypond -e EXPR means:").to_str0 ());
58 printf (_ (" Evalute the Scheme EXPR before parsing any .ly files.").to_str0 ());
60 printf (_ (" Multiple -e options may be given, they will be evaluated sequentially.").to_str0 ());
62 printf (_(" The function ly:set-option allows for access to some internal variables.").to_str0 ());
64 printf (_ ("Usage: lilypond-bin -e \"(ly-set-option SYMBOL VAL)\"").to_str0 ());
66 printf (_ ("Use help as SYMBOL to get online help.").to_str0 ());
69 return SCM_UNSPECIFIED;
74 @item -T,--no-timestamps
75 don't timestamp the output
78 Switch on any experimental features. Not for general public use.
83 LY_DEFINE (ly_set_option, "ly:set-option", 1, 1, 0, (SCM var, SCM val),
84 "Set a global option value. Supported options include\n"
90 "If set to true, generate human readable MIDI\n"
91 "@item internal-type-checking\n"
92 "Set paranoia for property assignments\n"
93 "@item parse-protect\n"
94 "If protection is switched on, errors in inline scheme are caught in the parser. \n"
95 "If off, GUILE will halt on errors, and give a stack trace. Default is protected evaluation. \n"
96 "@item old-relative\n"
97 "Relative for simultaneous music functions similar to chord syntax\n"
98 "@item new-relative\n"
99 "Relative for simultaneous music functions similar to sequential music\n"
102 "This function is useful to call from the command line: @code{lilypond -e\n"
103 "\"(ly-set-option 'midi-debug #t)\"}.\n")
105 if (val == SCM_UNDEFINED)
108 if (var == ly_symbol2scm ("help"))
109 /* lilypond -e "(ly-set-option 'help #t)" */
110 ly_option_usage (SCM_EOL);
111 else if (var == ly_symbol2scm ("midi-debug"))
112 midi_debug_global_b = to_boolean (val);
113 else if (var == ly_symbol2scm ("testing-level"))
114 testing_level_global = ly_scm2int (val);
115 else if (var == ly_symbol2scm ("parse-protect" ))
116 parse_protect_global = to_boolean (val);
117 else if (var == ly_symbol2scm ("internal-type-checking"))
118 internal_type_checking_global_b = to_boolean (val);
119 else if (var == ly_symbol2scm ("old-relative"))
121 lily_1_8_relative = true;
122 /* Needs to be reset for each file that uses this option. */
123 lily_1_8_compatibility_used = false;
125 else if (var == ly_symbol2scm ("new-relative"))
126 lily_1_8_relative = false;
127 else if (var == ly_symbol2scm ("debug-beam"))
129 extern bool debug_beam_quanting_flag;
130 debug_beam_quanting_flag = true;
133 warning (_f ("No such internal option: %s", ly_scm2string (var)));
135 return SCM_UNSPECIFIED;
138 LY_DEFINE (ly_get_option, "ly:get-option", 1, 0, 0, (SCM var),
139 "Get a global option setting. Supported options include\n"
141 "@item old-relative-used\n"
142 "Report whether old-relative compatibility mode is necessary\n"
143 "@item old-relative\n"
144 "Report whether old-relative compatibility mode is used\n"
146 "Report whether we are running in verbose mode\n"
150 SCM o = SCM_UNSPECIFIED;
152 if (var == ly_symbol2scm ("safe")) // heavily used; put in front.
153 o = ly_bool2scm (safe_global_b);
154 else if (var == ly_symbol2scm ("old-relative-used"))
155 o = ly_bool2scm (lily_1_8_compatibility_used);
156 else if (var == ly_symbol2scm ("old-relative"))
157 o = ly_bool2scm (lily_1_8_relative);
158 else if (var == ly_symbol2scm ("verbose"))
159 o = ly_bool2scm (verbose_global_b);
161 warning (_f ("No such internal option: %s", ly_scm2string (var)));