lily/lily-parser.cc

   1 /*
   2   lily-parser.cc -- implement Lily_parser
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 1997--2005 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7   Jan Nieuwenhuizen <janneke@gnu.org>
   8 */
   9
  10 #include "lily-parser.hh"
  11 #include "text-metrics.hh"
  12 #include "book.hh"
  13 #include "lilypond-key.hh"
  14 #include "lily-version.hh"
  15 #include "main.hh"
  16 #include "lily-lexer.hh"
  17 #include "output-def.hh"
  18 #include "paper-book.hh"
  19 #include "parser.hh"
  20 #include "score.hh"
  21 #include "file-name.hh"
  22 #include "file-path.hh"
  23 #include "source.hh"
  24 #include "warn.hh"
  25
  26 Lily_parser::Lily_parser (Sources *sources)
  27 {
  28   book_count_ = 0;
  29   score_count_ = 0;
  30   lexer_ = 0;
  31   sources_ = sources;
  32   default_duration_ = Duration (2, 0);
  33   error_level_ = 0;
  34
  35   smobify_self ();
  36
  37   lexer_ = new Lily_lexer (sources_);
  38   scm_gc_unprotect_object (lexer_->self_scm ());
  39 }
  40
  41 Lily_parser::Lily_parser (Lily_parser const &src)
  42 {
  43   book_count_ = src.book_count_;
  44   score_count_ = src.score_count_;
  45   lexer_ = 0;
  46   sources_ = src.sources_;
  47   default_duration_ = src.default_duration_;
  48   error_level_ = src.error_level_;
  49
  50   smobify_self ();
  51   if (src.lexer_)
  52     lexer_ = new Lily_lexer (*src.lexer_);
  53
  54   scm_gc_unprotect_object (lexer_->self_scm ());
  55 }
  56
  57 Lily_parser::~Lily_parser ()
  58 {
  59 }
  60
  61 #include "ly-smobs.icc"
  62
  63 IMPLEMENT_SMOBS (Lily_parser);
  64 IMPLEMENT_TYPE_P (Lily_parser, "ly:lily-parser?");
  65 IMPLEMENT_DEFAULT_EQUAL_P (Lily_parser);
  66
  67 SCM
  68 Lily_parser::mark_smob (SCM s)
  69 {
  70   Lily_parser *parser = (Lily_parser *) SCM_CELL_WORD_1 (s);
  71   return (parser->lexer_) ? parser->lexer_->self_scm () : SCM_EOL;
  72 }
  73
  74 int
  75 Lily_parser::print_smob (SCM s, SCM port, scm_print_state*)
  76 {
  77   scm_puts ("#<Lily_parser ", port);
  78   Lily_parser *parser = (Lily_parser *) SCM_CELL_WORD_1 (s);
  79   if (parser->lexer_)
  80     scm_display (parser->lexer_->self_scm (), port);
  81   else
  82     scm_puts ("(no lexer yet)", port);
  83   scm_puts (" >", port);
  84   return 1;
  85 }
  86
  87 /* Process one .ly file, or book.  */
  88 void
  89 Lily_parser::parse_file (String init, String name, String out_name)
  90 {
  91   if (output_backend_global == "tex")
  92     {
  93       try_load_text_metrics (out_name);
  94     }
  95
  96   // TODO: use $parser
  97   lexer_->set_identifier (ly_symbol2scm ("parser"),
  98                           self_scm ());
  99   output_basename_ = out_name;
 100
 101   lexer_->main_input_name_ = name;
 102
 103   message (_ ("Parsing..."));
 104   //  progress_indication ("\n");
 105
 106   set_yydebug (0);
 107
 108   lexer_->new_input (init, sources_);
 109
 110   File_name f (name);
 111   String s = global_path.find (f.base_ + ".twy");
 112   s = gulp_file_to_string (s, false);
 113   scm_eval_string (scm_makfrom0str (s.to_str0 ()));
 114
 115   /* Read .ly IN_FILE, lex, parse, write \score blocks from IN_FILE to
 116      OUT_FILE (unless IN_FILE redefines output file name).  */
 117
 118   SCM mod = lexer_->set_current_scope ();
 119   do_yyparse ();
 120   scm_set_current_module (mod);
 121
 122   if (!define_spots_.is_empty ())
 123     {
 124       define_spots_.top ().warning (_ ("braces don't match"));
 125       error_level_ = 1;
 126     }
 127
 128   error_level_ = error_level_ | lexer_->error_level_;
 129   lexer_ = 0;
 130 }
 131
 132 void
 133 Lily_parser::parse_string (String ly_code)
 134 {
 135    // TODO: use $parser
 136   lexer_->set_identifier (ly_symbol2scm ("parser"),
 137                           self_scm ());
 138
 139   lexer_->main_input_name_ = "<string>";
 140   lexer_->is_main_input_ = true;
 141
 142   set_yydebug (0);
 143   lexer_->new_input (lexer_->main_input_name_, ly_code, sources_);
 144
 145   SCM mod = lexer_->set_current_scope ();
 146   do_yyparse ();
 147   scm_set_current_module (mod);
 148
 149   if (!define_spots_.is_empty ())
 150     {
 151       if (define_spots_.is_empty ()
 152           && !error_level_)
 153         programming_error ("define_spots_ don't match, but error_level_ not set.");
 154     }
 155
 156   error_level_ = error_level_ | lexer_->error_level_;
 157 }
 158
 159 char const *
 160 Lily_parser::here_str0 () const
 161 {
 162   return lexer_->here_str0 ();
 163 }
 164
 165 void
 166 Lily_parser::parser_error (String s)
 167 {
 168   lexer_->here_input ().error (_ (s.to_str0 ()));
 169   error_level_ = 1;
 170 }
 171
 172 void
 173 Lily_parser::parser_error (Input const &i, String s)
 174 {
 175   i.error (s);
 176   error_level_ = 1;
 177 }
 178
 179 /****************************************************************/
 180
 181 Output_def *
 182 get_layout (Lily_parser *parser)
 183 {
 184   SCM id = parser->lexer_->lookup_identifier ("$defaultlayout");
 185   Output_def *layout = unsmob_output_def (id);
 186   layout = layout ? layout->clone () : new Output_def;
 187   layout->set_variable (ly_symbol2scm ("is-layout"), SCM_BOOL_T);
 188
 189   return layout;
 190 }
 191
 192 Output_def *
 193 get_midi (Lily_parser *parser)
 194 {
 195   SCM id = parser->lexer_->lookup_identifier ("$defaultmidi");
 196   Output_def *layout = unsmob_output_def (id);
 197   layout = layout ? layout->clone () : new Output_def;
 198   layout->set_variable (ly_symbol2scm ("is-midi"), SCM_BOOL_T);
 199   return layout;
 200 }
 201
 202 Output_def *
 203 get_paper (Lily_parser *parser)
 204 {
 205   SCM id = parser->lexer_->lookup_identifier ("$defaultpaper");
 206   Output_def *layout = unsmob_output_def (id);
 207
 208   layout = layout ? dynamic_cast<Output_def *> (layout->clone ()) : new Output_def;
 209   layout->set_variable (ly_symbol2scm ("is-paper"), SCM_BOOL_T);
 210   return layout;
 211 }
 212