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   {"alias", ALIAS},
  30   {"apply", APPLY},
  31   {"applycontext", APPLYCONTEXT},
  32   {"applyoutput", APPLYOUTPUT},
  33   {"autochange", AUTOCHANGE},
  34   {"simultaneous", SIMULTANEOUS},
  35   {"sequential", SEQUENTIAL},
  36   {"accepts", ACCEPTS},
  37   {"alternative", ALTERNATIVE},
  38   {"bar", BAR},
  39   {"breathe", BREATHE},
  40   {"chordmodifiers", CHORDMODIFIERS},
  41   {"chords", CHORDS},
  42   {"clef", CLEF},
  43   {"consists", CONSISTS},
  44   {"consistsend", CONSISTSEND},
  45   {"context", CONTEXT},
  46   {"default", DEFAULT},
  47   {"denies", DENIES},
  48   {"description", DESCRIPTION},
  49   {"duration", DURATION},
  50   {"grobdescriptions", GROBDESCRIPTIONS},
  51   {"figures",FIGURES},
  52   {"grace", GRACE},
  53   {"header", HEADER},
  54   {"lyrics", LYRICS},
  55   {"key", KEY},
  56   {"mark", MARK},
  57   {"markup", MARKUP},
  58   {"once", ONCE},
  59   {"pitch", PITCH},
  60   {"time", TIME_T},
  61   {"times", TIMES},
  62   {"midi", MIDI},
  63   {"name", NAME},
  64   {"pitchnames", PITCHNAMES},
  65   {"notes", NOTES},
  66   {"outputproperty", OUTPUTPROPERTY},
  67   {"override", OVERRIDE},
  68   {"set", SET},
  69   {"rest", REST},
  70   {"revert", REVERT},
  71   {"partial", PARTIAL},
  72   {"paper", PAPER},
  73   {"property", PROPERTY},
  74   {"relative", RELATIVE},
  75   {"remove", REMOVE},
  76   {"repeat", REPEAT},
  77   {"addlyrics", ADDLYRICS},
  78   {"partcombine", PARTCOMBINE},
  79   {"score", SCORE},
  80   {"skip", SKIP},
  81   {"tempo", TEMPO},
  82   {"translator", TRANSLATOR},
  83   {"transpose", TRANSPOSE},
  84   {"type", TYPE},
  85   {"unset", UNSET},
  86   {0,0}
  87 };
  88
  89
  90 My_lily_lexer::My_lily_lexer ()
  91 {
  92   keytable_ = new Keyword_table (the_key_tab);
  93   scopes_ = SCM_EOL;
  94
  95   add_scope(ly_make_anonymous_module());
  96   errorlevel_ =0;
  97
  98   main_input_b_ = false;
  99 }
 100
 101 void
 102 My_lily_lexer::add_scope (SCM module)
 103 {
 104   ly_reexport_module (scm_current_module());
 105   scm_set_current_module (module);
 106   for (SCM s = scopes_; gh_pair_p (s); s = gh_cdr (s))
 107     {
 108       /*
 109         UGH. how to do this more neatly?
 110       */
 111       SCM expr = scm_list_n (ly_symbol2scm ("module-use!"),
 112                              module, scm_list_n (ly_symbol2scm ("module-public-interface"),
 113                                                  gh_car (s), SCM_UNDEFINED),
 114                              SCM_UNDEFINED);
 115
 116       scm_primitive_eval(expr);
 117     }
 118
 119   scopes_ = scm_cons (module, scopes_);
 120 }
 121
 122 SCM
 123 My_lily_lexer::remove_scope ()
 124 {
 125   SCM sc = gh_car (scopes_);
 126   scopes_ = gh_cdr (scopes_);
 127   scm_set_current_module (gh_car (scopes_));
 128
 129   return sc;
 130 }
 131
 132
 133 int
 134 My_lily_lexer::lookup_keyword (String s)
 135 {
 136   return keytable_->lookup (s.to_str0 ());
 137 }
 138
 139 SCM
 140 My_lily_lexer::lookup_identifier (String s)
 141 {
 142   SCM sym = ly_symbol2scm (s.to_str0());
 143   for (SCM s = scopes_; gh_pair_p (s); s = gh_cdr (s))
 144     {
 145       SCM var = ly_module_lookup (gh_car (s), sym);
 146       if (var != SCM_BOOL_F)
 147         return scm_variable_ref(var);
 148     }
 149
 150   return SCM_UNDEFINED;
 151 }
 152
 153 void
 154 My_lily_lexer::start_main_input ()
 155 {
 156   new_input (main_input_string_, &global_input_file->sources_);
 157   allow_includes_b_ = allow_includes_b_ &&  ! (safe_global_b);
 158 }
 159
 160 void
 161 My_lily_lexer::set_identifier (SCM name, SCM s)
 162 {
 163   assert (gh_string_p (name));
 164
 165   if (lookup_keyword (ly_scm2string (name)) >= 0)
 166     {
 167       size_t sz;
 168       char * str = gh_scm2newstr (name, &sz) ;
 169       warning (_f ("Identifier name is a keyword: `%s'", str));
 170       free  (str);
 171     }
 172
 173   SCM sym = scm_string_to_symbol (name);
 174   SCM mod = gh_car (scopes_);
 175
 176   scm_module_define (mod, sym, s);
 177 }
 178
 179 My_lily_lexer::~My_lily_lexer ()
 180 {
 181   delete keytable_;
 182 }
 183
 184
 185
 186 void
 187 My_lily_lexer::LexerError (char const *s)
 188 {
 189   if (include_stack_.empty ())
 190     {
 191       progress_indication (_f ("error at EOF: %s", s)+ String ("\n"));
 192     }
 193   else
 194     {
 195       errorlevel_ |= 1;
 196       Input spot (get_source_file (), here_str0 ());
 197       spot.error (s);
 198     }
 199 }
 200
 201 char
 202 My_lily_lexer::escaped_char (char c) const
 203 {
 204   switch (c)
 205     {
 206     case 'n':
 207       return '\n';
 208     case 't':
 209       return '\t';
 210
 211     case '\'':
 212     case '\"':
 213     case '\\':
 214       return c;
 215     }
 216   return 0;
 217 }
 218
 219 Input
 220 My_lily_lexer::here_input () const
 221 {
 222   Source_file * f= get_source_file ();
 223   return Input (f, (char*)here_str0 ());
 224 }
 225
 226 void
 227 My_lily_lexer::prepare_for_next_token ()
 228 {
 229   last_input_ = here_input();
 230 }
 231
 232 #if 0
 233 SCM
 234 My_lily_lexer::scan_markup_word (String s)
 235 {
 236   /*
 237     TODO: better implementation:
 238
 239     - make a table of markup functions, for quicker lookup
 240
 241     - error handling.
 242
 243    */
 244   SCM s = scm_c_eval_str ((s + "-markup").to_str0());
 245   yylval.scm = s;
 246   return MARKUP_HEAD;
 247 }
 248 #endif