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--2007 Han-Wen Nienhuys <hanwen@xs4all.nl>
   7   Jan Nieuwenhuizen <janneke@gnu.org>
   8 */
   9
  10 #include "lily-parser.hh"
  11
  12 #include "book.hh"
  13 #include "file-name.hh"
  14 #include "file-path.hh"
  15 #include "international.hh"
  16 #include "lily-lexer.hh"
  17 #include "lily-version.hh"
  18 #include "ly-module.hh"
  19 #include "main.hh"
  20 #include "output-def.hh"
  21 #include "paper-book.hh"
  22 #include "parser.hh"
  23 #include "score.hh"
  24 #include "sources.hh"
  25 #include "text-metrics.hh"
  26 #include "warn.hh"
  27 #include "program-option.hh"
  28
  29 #include "ly-smobs.icc"
  30
  31 Lily_parser::Lily_parser (Sources *sources)
  32 {
  33   lexer_ = 0;
  34   sources_ = sources;
  35   default_duration_ = Duration (2, 0);
  36   error_level_ = 0;
  37
  38   smobify_self ();
  39
  40   lexer_ = new Lily_lexer (sources_, this);
  41   lexer_->unprotect ();
  42 }
  43
  44 Lily_parser::Lily_parser (Lily_parser const &src)
  45 {
  46   lexer_ = 0;
  47   sources_ = src.sources_;
  48   default_duration_ = src.default_duration_;
  49   error_level_ = src.error_level_;
  50   output_basename_ = src.output_basename_;
  51
  52   smobify_self ();
  53   if (src.lexer_)
  54     {
  55       lexer_ = new Lily_lexer (*src.lexer_, this);
  56     }
  57
  58   lexer_->unprotect ();
  59 }
  60
  61 Lily_parser::~Lily_parser ()
  62 {
  63 }
  64
  65
  66 SCM
  67 Lily_parser::mark_smob (SCM s)
  68 {
  69   Lily_parser *parser = (Lily_parser *) SCM_CELL_WORD_1 (s);
  70   return (parser->lexer_) ? parser->lexer_->self_scm () : SCM_EOL;
  71 }
  72
  73 int
  74 Lily_parser::print_smob (SCM s, SCM port, scm_print_state*)
  75 {
  76   scm_puts ("#<Lily_parser ", port);
  77   Lily_parser *parser = (Lily_parser *) SCM_CELL_WORD_1 (s);
  78   if (parser->lexer_)
  79     scm_display (parser->lexer_->self_scm (), port);
  80   else
  81     scm_puts ("(no lexer yet)", port);
  82   scm_puts (" >", port);
  83   return 1;
  84 }
  85
  86 /* Process one .ly file, or book.  */
  87 void
  88 Lily_parser::parse_file (string init, string name, string out_name)
  89 {
  90   if (get_output_backend_name () == "tex")
  91     try_load_text_metrics (out_name);
  92
  93   // TODO: use $parser
  94   lexer_->set_identifier (ly_symbol2scm ("parser"), self_scm ());
  95   output_basename_ = out_name;
  96
  97   lexer_->main_input_name_ = name;
  98
  99   message (_ ("Parsing..."));
 100
 101   set_yydebug (0);
 102
 103   lexer_->new_input (init, sources_);
 104
 105   File_name f (name);
 106   string s = global_path.find (f.base_ + ".twy");
 107   s = gulp_file_to_string (s, false, -1);
 108   scm_eval_string (ly_string2scm (s));
 109
 110   /* Read .ly IN_FILE, lex, parse, write \score blocks from IN_FILE to
 111      OUT_FILE (unless IN_FILE redefines output file name).  */
 112
 113   SCM mod = lexer_->set_current_scope ();
 114   do_yyparse ();
 115
 116   /*
 117     Don't mix cyclic pointers with weak tables.
 118   */
 119   lexer_->set_identifier (ly_symbol2scm ("parser"),
 120                           SCM_EOL);
 121   ly_reexport_module (scm_current_module ());
 122
 123   scm_set_current_module (mod);
 124
 125   if (!define_spots_.empty ())
 126     {
 127       define_spots_.back ().warning (_ ("braces do not match"));
 128       error_level_ = 1;
 129     }
 130
 131   error_level_ = error_level_ | lexer_->error_level_;
 132   clear ();
 133 }
 134
 135 void
 136 Lily_parser::parse_string (string ly_code)
 137 {
 138   // TODO: use $parser
 139   lexer_->set_identifier (ly_symbol2scm ("parser"),
 140                           self_scm ());
 141
 142   lexer_->main_input_name_ = "<string>";
 143   lexer_->is_main_input_ = true;
 144   lexer_->new_input (lexer_->main_input_name_, ly_code, sources_);
 145
 146   SCM mod = lexer_->set_current_scope ();
 147   do_yyparse ();
 148   scm_set_current_module (mod);
 149
 150   if (!define_spots_.empty ())
 151     {
 152       if (define_spots_.empty ()
 153           && !error_level_)
 154         programming_error ("define_spots_ don't match, but error_level_ not set.");
 155     }
 156
 157   error_level_ = error_level_ | lexer_->error_level_;
 158 }
 159
 160 void
 161 Lily_parser::clear ()
 162 {
 163   if (lexer_)
 164     {
 165       while (lexer_->has_scope ())
 166         lexer_->remove_scope ();
 167     }
 168
 169   lexer_ = 0;
 170 }
 171
 172 char const *
 173 Lily_parser::here_str0 () const
 174 {
 175   return lexer_->here_str0 ();
 176 }
 177
 178 void
 179 Lily_parser::parser_error (string s)
 180 {
 181   lexer_->here_input ().error (_ (s.c_str ()));
 182   error_level_ = 1;
 183 }
 184
 185 void
 186 Lily_parser::parser_error (Input const &i, string s)
 187 {
 188   i.error (s);
 189   error_level_ = 1;
 190 }
 191
 192
 193
 194 IMPLEMENT_SMOBS (Lily_parser);
 195 IMPLEMENT_TYPE_P (Lily_parser, "ly:lily-parser?");
 196 IMPLEMENT_DEFAULT_EQUAL_P (Lily_parser);
 197
 198
 199 /****************************************************************
 200   OUTPUT-DEF
 201  ****************************************************************/
 202
 203 Output_def *
 204 get_layout (Lily_parser *parser)
 205 {
 206   SCM id = parser->lexer_->lookup_identifier ("$defaultlayout");
 207   Output_def *layout = unsmob_output_def (id);
 208   layout = layout ? layout->clone () : new Output_def;
 209   layout->set_variable (ly_symbol2scm ("is-layout"), SCM_BOOL_T);
 210
 211   return layout;
 212 }
 213
 214 Output_def *
 215 get_midi (Lily_parser *parser)
 216 {
 217   SCM id = parser->lexer_->lookup_identifier ("$defaultmidi");
 218   Output_def *layout = unsmob_output_def (id);
 219   layout = layout ? layout->clone () : new Output_def;
 220   layout->set_variable (ly_symbol2scm ("is-midi"), SCM_BOOL_T);
 221   return layout;
 222 }
 223
 224 Output_def *
 225 get_paper (Lily_parser *parser)
 226 {
 227   SCM id = parser->lexer_->lookup_identifier ("$defaultpaper");
 228   Output_def *layout = unsmob_output_def (id);
 229
 230   layout = layout ? dynamic_cast<Output_def *> (layout->clone ()) : new Output_def;
 231   layout->set_variable (ly_symbol2scm ("is-paper"), SCM_BOOL_T);
 232   return layout;
 233 }
 234
 235 SCM
 236 get_header (Lily_parser *parser)
 237 {
 238   SCM id = parser->lexer_->lookup_identifier ("$defaultheader");
 239   if (!ly_is_module (id))
 240     id = parser->make_scope ();
 241   else
 242     {
 243       SCM nid = parser->make_scope ();
 244       ly_module_copy (nid, id);
 245       id = nid;
 246     }
 247
 248   return id;
 249 }
 250
 251 SCM
 252 Lily_parser::make_scope () const
 253 {
 254   SCM module = ly_make_anonymous_module (be_safe_global);
 255   return module;
 256 }