lily/my-lily-lexer.cc

   1 /*
   2   my-lily-lexer.cc -- implement My_lily_lexer
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c)  1997--2003 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7 */
   8
   9 #include <ctype.h>
  10 #include <sstream>
  11
  12 #include "lily-proto.hh"
  13 #include "scm-hash.hh"
  14 #include "interval.hh"
  15 #include "input-file-results.hh"
  16 #include "lily-guile.hh"
  17 #include "parser.hh"
  18 #include "keyword.hh"
  19 #include "my-lily-lexer.hh"
  20 #include "warn.hh"
  21 #include "source-file.hh"
  22 #include "main.hh"
  23 #include "input.hh"
  24 #include "moment.hh"
  25 #include "ly-modules.hh"
  26
  27
  28 static Keyword_ent the_key_tab[]={
  29   {"acciaccatura", ACCIACCATURA},
  30   {"accepts", ACCEPTS},
  31   {"addlyrics", ADDLYRICS},
  32   {"alias", ALIAS},
  33   {"alternative", ALTERNATIVE},
  34   {"apply", APPLY},
  35   {"applycontext", APPLYCONTEXT},
  36   {"applyoutput", APPLYOUTPUT},
  37   {"appoggiatura", APPOGGIATURA},
  38   {"autochange", AUTOCHANGE},
  39   {"bar", BAR},
  40   {"breathe", BREATHE},
  41   {"chordmodifiers", CHORDMODIFIERS},
  42   {"chords", CHORDS},
  43   {"clef", CLEF},
  44   {"consists", CONSISTS},
  45   {"consistsend", CONSISTSEND},
  46   {"context", CONTEXT},
  47   {"default", DEFAULT},
  48   {"denies", DENIES},
  49   {"description", DESCRIPTION},
  50   {"figures",FIGURES},
  51   {"grace", GRACE},
  52   {"grobdescriptions", GROBDESCRIPTIONS},
  53   {"header", HEADER},
  54   {"key", KEY},
  55   {"lyrics", LYRICS},
  56   {"mark", MARK},
  57   {"markup", MARKUP},
  58   {"midi", MIDI},
  59   {"name", NAME},
  60   {"new", NEWCONTEXT},
  61   {"notes", NOTES},
  62   {"octave", OCTAVE},
  63   {"once", ONCE},
  64   {"override", OVERRIDE},
  65   {"paper", PAPER},
  66   {"partcombine", PARTCOMBINE},
  67   {"partial", PARTIAL},
  68   {"pitchnames", PITCHNAMES},
  69   {"property", PROPERTY},
  70   {"relative", RELATIVE},
  71   {"remove", REMOVE},
  72   {"repeat", REPEAT},
  73   {"rest", REST},
  74   {"revert", REVERT},
  75   {"score", SCORE},
  76   {"sequential", SEQUENTIAL},
  77   {"set", SET},
  78   {"simultaneous", SIMULTANEOUS},
  79   {"skip", SKIP},
  80   {"tag", TAG},
  81   {"tempo", TEMPO},
  82   {"time", TIME_T},
  83   {"times", TIMES},
  84   {"translator", TRANSLATOR},
  85   {"transpose", TRANSPOSE},
  86   {"type", TYPE},
  87   {"unset", UNSET},
  88   {0,0}
  89 };
  90
  91
  92 My_lily_lexer::My_lily_lexer ()
  93 {
  94   //  yy_flex_debug = 1;
  95
  96   keytable_ = new Keyword_table (the_key_tab);
  97
  98   chordmodifier_tab_ = scm_make_vector (gh_int2scm (1), SCM_EOL);
  99   pitchname_tab_ = scm_make_vector (gh_int2scm (1), SCM_EOL);
 100
 101   scopes_ = SCM_EOL;
 102
 103   add_scope(ly_make_anonymous_module());
 104   errorlevel_ =0;
 105
 106   main_input_b_ = false;
 107 }
 108
 109 void
 110 My_lily_lexer::add_scope (SCM module)
 111 {
 112   ly_reexport_module (scm_current_module());
 113   scm_set_current_module (module);
 114   for (SCM s = scopes_; gh_pair_p (s); s = gh_cdr (s))
 115     {
 116       /*
 117         UGH. how to do this more neatly?
 118       */
 119       SCM expr = scm_list_n (ly_symbol2scm ("module-use!"),
 120                              module, scm_list_n (ly_symbol2scm ("module-public-interface"),
 121                                                  gh_car (s), SCM_UNDEFINED),
 122                              SCM_UNDEFINED);
 123
 124       scm_primitive_eval(expr);
 125     }
 126
 127   scopes_ = scm_cons (module, scopes_);
 128 }
 129
 130 SCM
 131 My_lily_lexer::remove_scope ()
 132 {
 133   SCM sc = gh_car (scopes_);
 134   scopes_ = gh_cdr (scopes_);
 135   scm_set_current_module (gh_car (scopes_));
 136
 137   return sc;
 138 }
 139
 140
 141 int
 142 My_lily_lexer::lookup_keyword (String s)
 143 {
 144   return keytable_->lookup (s.to_str0 ());
 145 }
 146
 147 SCM
 148 My_lily_lexer::lookup_identifier (String s)
 149 {
 150   SCM sym = ly_symbol2scm (s.to_str0());
 151   for (SCM s = scopes_; gh_pair_p (s); s = gh_cdr (s))
 152     {
 153       SCM var = ly_module_lookup (gh_car (s), sym);
 154       if (var != SCM_BOOL_F)
 155         return scm_variable_ref(var);
 156     }
 157
 158   return SCM_UNDEFINED;
 159 }
 160
 161 void
 162 My_lily_lexer::start_main_input ()
 163 {
 164   new_input (main_input_string_, &global_input_file->sources_);
 165   allow_includes_b_ = allow_includes_b_ &&  ! (safe_global_b);
 166
 167   scm_module_define (gh_car (scopes_),
 168                      ly_symbol2scm ("input-file-name"),
 169                      scm_makfrom0str (main_input_string_.to_str0()));
 170 }
 171
 172 void
 173 My_lily_lexer::set_identifier (SCM name, SCM s)
 174 {
 175   assert (gh_string_p (name));
 176
 177   if (lookup_keyword (ly_scm2string (name)) >= 0)
 178     {
 179       size_t sz;
 180       char * str = gh_scm2newstr (name, &sz) ;
 181       warning (_f ("Identifier name is a keyword: `%s'", str));
 182       free  (str);
 183     }
 184
 185   SCM sym = scm_string_to_symbol (name);
 186   SCM mod = gh_car (scopes_);
 187
 188   scm_module_define (mod, sym, s);
 189 }
 190
 191 My_lily_lexer::~My_lily_lexer ()
 192 {
 193   delete keytable_;
 194 }
 195
 196
 197
 198 void
 199 My_lily_lexer::LexerError (char const *s)
 200 {
 201   if (include_stack_.empty ())
 202     {
 203       progress_indication (_f ("error at EOF: %s", s)+ String ("\n"));
 204     }
 205   else
 206     {
 207       errorlevel_ |= 1;
 208       Input spot (get_source_file (), here_str0 ());
 209       spot.error (s);
 210     }
 211 }
 212
 213 char
 214 My_lily_lexer::escaped_char (char c) const
 215 {
 216   switch (c)
 217     {
 218     case 'n':
 219       return '\n';
 220     case 't':
 221       return '\t';
 222
 223     case '\'':
 224     case '\"':
 225     case '\\':
 226       return c;
 227     }
 228   return 0;
 229 }
 230
 231 Input
 232 My_lily_lexer::here_input () const
 233 {
 234   Source_file * f= get_source_file ();
 235   return Input (f, (char*)here_str0 ());
 236 }
 237
 238 void
 239 My_lily_lexer::prepare_for_next_token ()
 240 {
 241   last_input_ = here_input();
 242 }