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