lily/lily-parser-scheme.cc

   1 /*
   2   This file is part of LilyPond, the GNU music typesetter.
   3
   4   Copyright (C) 2005--2010 Han-Wen Nienhuys <hanwen@xs4all.nl>
   5
   6   LilyPond is free software: you can redistribute it and/or modify
   7   it under the terms of the GNU General Public License as published by
   8   the Free Software Foundation, either version 3 of the License, or
   9   (at your option) any later version.
  10
  11   LilyPond is distributed in the hope that it will be useful,
  12   but WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14   GNU General Public License for more details.
  15
  16   You should have received a copy of the GNU General Public License
  17   along with LilyPond.  If not, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20 #include <unistd.h>
  21
  22 #include "lily-parser.hh"
  23
  24 #include "file-name-map.hh"
  25 #include "file-name.hh"
  26 #include "file-path.hh"
  27 #include "international.hh"
  28 #include "lily-lexer.hh"
  29 #include "ly-module.hh"
  30 #include "main.hh"
  31 #include "program-option.hh"
  32 #include "sources.hh"
  33 #include "warn.hh"
  34
  35 LY_DEFINE (ly_parse_file, "ly:parse-file",
  36            1, 0, 0, (SCM name),
  37            "Parse a single @code{.ly} file."
  38            "  Upon failure, throw @code{ly-file-failed} key.")
  39 {
  40   LY_ASSERT_TYPE (scm_is_string, name, 1);
  41   string file = ly_scm2string (name);
  42   char const *extensions[] = {"ly", "", 0};
  43
  44   string file_name = global_path.find (file, extensions);
  45
  46   /* By default, use base name of input file for output file name,
  47      write output to cwd; do not use root and directory parts of input
  48      file name.  */
  49   File_name out_file_name (file_name);
  50
  51   out_file_name.ext_ = "";
  52   out_file_name.root_ = "";
  53   if (ly_get_option (ly_symbol2scm ("gui")) != SCM_BOOL_T
  54       && ly_get_option (ly_symbol2scm ("strip-output-dir")) == SCM_BOOL_T) {
  55     out_file_name.dir_ = "";
  56   }
  57
  58   /* When running from gui, generate output in .ly source directory.  */
  59   string output_name = output_name_global;
  60   if (!output_name.empty ())
  61     {
  62       /* Interpret --output=DIR to mean --output=DIR/BASE.  */
  63       string dir;
  64       if (is_dir (output_name))
  65         {
  66           dir = output_name;
  67           output_name = "";
  68         }
  69       else
  70         {
  71           File_name out (output_name);
  72           if (is_dir (out.dir_part ()))
  73             {
  74               dir = out.dir_part ();
  75               out_file_name = out.file_part ();
  76             }
  77         }
  78
  79       if (dir != "" && dir != "." && dir != get_working_directory ())
  80         {
  81           global_path.prepend (get_working_directory ());
  82           message (_f ("Changing working directory to: `%s'",
  83                        dir.c_str ()));
  84           chdir (dir.c_str ());
  85         }
  86       else
  87         out_file_name = File_name (output_name);
  88     }
  89
  90   string init;
  91   if (!init_name_global.empty ())
  92     init = init_name_global;
  93   else
  94     init = "init.ly";
  95
  96   string out_file = out_file_name.to_string ();
  97   if (init.length () && global_path.find (init).empty ())
  98     {
  99       warning (_f ("cannot find init file: `%s'", init));
 100       warning (_f ("(search path: `%s')",
 101                    global_path.to_string ().c_str ()));
 102       exit (2);
 103     }
 104
 105
 106   bool error = false;
 107   if ((file_name != "-") && file_name.empty ())
 108     {
 109       warning (_f ("cannot find file: `%s'", file));
 110       error = true;
 111     }
 112   else
 113     {
 114       Sources sources;
 115       sources.set_path (&global_path);
 116
 117       string mapped_fn = map_file_name (file_name);
 118       message (_f ("Processing `%s'", mapped_fn.c_str ()));
 119       progress_indication ("\n");
 120
 121       Lily_parser *parser = new Lily_parser (&sources);
 122
 123       parser->parse_file (init, file_name, out_file);
 124
 125       error = parser->error_level_;
 126
 127       parser->clear ();
 128       parser->unprotect ();
 129     }
 130
 131   /*
 132     outside the if-else to ensure cleanup fo Sources object,
 133   */
 134   if (error)
 135     /* TODO: pass renamed input file too.  */
 136     scm_throw (ly_symbol2scm ("ly-file-failed"),
 137                scm_list_1 (ly_string2scm (file_name)));
 138
 139   return SCM_UNSPECIFIED;
 140 }
 141
 142
 143 LY_DEFINE (ly_parser_lexer, "ly:parser-lexer",
 144            1, 0, 0, (SCM parser_smob),
 145            "Return the lexer for @var{parser-smob}.")
 146 {
 147   Lily_parser *parser = unsmob_lily_parser (parser_smob);
 148   return parser->lexer_->self_scm ();
 149 }
 150
 151 LY_DEFINE (ly_parser_clone, "ly:parser-clone",
 152            1, 0, 0, (SCM parser_smob),
 153            "Return a clone of @var{parser-smob}.")
 154 {
 155   LY_ASSERT_SMOB (Lily_parser, parser_smob, 1);
 156   Lily_parser *parser = unsmob_lily_parser (parser_smob);
 157   Lily_parser *clone = new Lily_parser (*parser);
 158
 159   return clone->unprotect ();
 160 }
 161
 162 LY_DEFINE (ly_parser_define_x, "ly:parser-define!",
 163            3, 0, 0, (SCM parser_smob, SCM symbol, SCM val),
 164            "Bind @var{symbol} to @var{val} in @var{parser-smob}'s module.")
 165 {
 166
 167   LY_ASSERT_SMOB (Lily_parser, parser_smob, 1);
 168   Lily_parser *parser = unsmob_lily_parser (parser_smob);
 169
 170   LY_ASSERT_TYPE (ly_is_symbol, symbol, 2);
 171
 172   parser->lexer_->set_identifier (scm_symbol_to_string (symbol), val);
 173   return SCM_UNSPECIFIED;
 174 }
 175
 176 LY_DEFINE (ly_parser_lookup, "ly:parser-lookup",
 177            2, 0, 0, (SCM parser_smob, SCM symbol),
 178            "Look up @var{symbol} in @var{parser-smob}'s module."
 179            "  Return @code{'()} if not defined.")
 180 {
 181   LY_ASSERT_SMOB (Lily_parser, parser_smob, 1);
 182
 183   Lily_parser *parser = unsmob_lily_parser (parser_smob);
 184
 185   LY_ASSERT_TYPE (ly_is_symbol, symbol, 2);
 186
 187   SCM val = parser->lexer_->lookup_identifier (ly_scm2string (scm_symbol_to_string (symbol)));
 188   if (val != SCM_UNDEFINED)
 189     return val;
 190   else
 191     return SCM_EOL;
 192 }
 193
 194 LY_DEFINE (ly_parser_parse_string, "ly:parser-parse-string",
 195            2, 0, 0, (SCM parser_smob, SCM ly_code),
 196            "Parse the string @var{ly-code} with @var{parser-smob}."
 197            "  Upon failure, throw @code{ly-file-failed} key.")
 198 {
 199   LY_ASSERT_SMOB (Lily_parser, parser_smob, 1);
 200   Lily_parser *parser = unsmob_lily_parser (parser_smob);
 201   LY_ASSERT_TYPE (scm_is_string, ly_code, 2);
 202
 203   parser->parse_string (ly_scm2string (ly_code));
 204
 205   return SCM_UNSPECIFIED;
 206 }
 207
 208 LY_DEFINE (ly_parser_set_note_names, "ly:parser-set-note-names",
 209            2, 0, 0, (SCM parser, SCM names),
 210            "Replace current note names in @var{parser}."
 211            "  @var{names} is an alist of symbols.  This only has effect"
 212            " if the current mode is notes.")
 213 {
 214   LY_ASSERT_SMOB (Lily_parser, parser, 1);
 215   Lily_parser *p = unsmob_lily_parser (parser);
 216
 217   if (p->lexer_->is_note_state ())
 218     {
 219       p->lexer_->pop_state ();
 220       p->lexer_->push_note_state (alist_to_hashq (names));
 221     }
 222
 223   return SCM_UNSPECIFIED;
 224 }
 225
 226 LY_DEFINE (ly_parser_set_repetition_symbol, "ly:parser-set-repetition-symbol",
 227            2, 0, 0, (SCM parser, SCM sym),
 228            "Replace the current repetition symbol in @var{parser}."
 229            "  @var{sym} is the new repetition symbol.")
 230 {
 231   LY_ASSERT_SMOB (Lily_parser, parser, 1);
 232   Lily_parser *p = unsmob_lily_parser (parser);
 233
 234   p->lexer_->chord_repetition_.repetition_symbol_ = sym;
 235
 236   return SCM_UNSPECIFIED;
 237 }
 238
 239 LY_DEFINE (ly_parser_set_repetition_function, "ly:parser-set-repetition-function",
 240            2, 0, 0, (SCM parser, SCM fun),
 241            "Replace the current repetition function in @var{parser}."
 242            "  @var{fun} is the new repetition function.")
 243 {
 244   LY_ASSERT_SMOB (Lily_parser, parser, 1);
 245   Lily_parser *p = unsmob_lily_parser (parser);
 246
 247   p->lexer_->chord_repetition_.repetition_function_ = fun;
 248
 249   return SCM_UNSPECIFIED;
 250 }
 251
 252 LY_DEFINE (ly_parser_output_name, "ly:parser-output-name",
 253            1, 0, 0, (SCM parser),
 254            "Return the base name of the output file.")
 255 {
 256   LY_ASSERT_SMOB (Lily_parser, parser, 1);
 257   Lily_parser *p = unsmob_lily_parser (parser);
 258
 259   return ly_string2scm (p->output_basename_);
 260 }
 261
 262 LY_DEFINE (ly_parser_error, "ly:parser-error",
 263            2, 1, 0, (SCM parser, SCM msg, SCM input),
 264            "Display an error message and make the parser fail.")
 265 {
 266   LY_ASSERT_SMOB (Lily_parser, parser, 1);
 267   Lily_parser *p = unsmob_lily_parser (parser);
 268
 269   LY_ASSERT_TYPE (scm_is_string, msg, 2);
 270   string s = ly_scm2string (msg);
 271
 272   Input *i = unsmob_input (input);
 273   if (i)
 274     p->parser_error (*i, s);
 275   else
 276     p->parser_error (s);
 277
 278   return parser;
 279 }
 280
 281 LY_DEFINE (ly_parser_clear_error, "ly:parser-clear-error",
 282            1, 0, 0, (SCM parser),
 283            "Clear the error flag for the parser.")
 284 {
 285   LY_ASSERT_SMOB (Lily_parser, parser, 1);
 286   Lily_parser *p = unsmob_lily_parser (parser);
 287
 288
 289   p->error_level_ = 0;
 290   p->lexer_->error_level_ = 0;
 291
 292   return SCM_UNSPECIFIED;
 293 }
 294
 295 LY_DEFINE (ly_parser_has_error_p, "ly:parser-has-error?",
 296            1, 0, 0, (SCM parser),
 297            "Does @var{parser} have an error flag?")
 298 {
 299   LY_ASSERT_SMOB (Lily_parser, parser, 1);
 300   Lily_parser *p = unsmob_lily_parser (parser);
 301
 302   return scm_from_bool (p->error_level_ || p->lexer_->error_level_);
 303 }