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--2002 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7 */
   8
   9 #include <ctype.h>
  10
  11 #include <sstream>
  12
  13 #include "lily-proto.hh"
  14 #include "scm-hash.hh"
  15 #include "interval.hh"
  16 #include "input-file-results.hh"
  17 #include "lily-guile.hh"
  18 #include "parser.hh"
  19 #include "keyword.hh"
  20 #include "my-lily-lexer.hh"
  21 #include "warn.hh"
  22 #include "source-file.hh"
  23 #include "main.hh"
  24 #include "input.hh"
  25 #include "moment.hh"
  26
  27 static Keyword_ent the_key_tab[]={
  28   {"alias", ALIAS},
  29   {"apply", APPLY},
  30   {"arpeggio", ARPEGGIO },
  31   {"autochange", AUTOCHANGE},
  32   {"spanrequest", SPANREQUEST},
  33   {"commandspanrequest", COMMANDSPANREQUEST},
  34   {"simultaneous", SIMULTANEOUS},
  35   {"sequential", SEQUENTIAL},
  36   {"accepts", ACCEPTS},
  37   {"alternative", ALTERNATIVE},
  38   {"bar", BAR},
  39   {"breathe", BREATHE},
  40   {"char", CHAR_T},
  41   {"chordmodifiers", CHORDMODIFIERS},
  42   {"chords", CHORDS},
  43   {"clef", CLEF},
  44   {"cm", CM_T},
  45   {"consists", CONSISTS},
  46   {"consistsend", CONSISTSEND},
  47   {"context", CONTEXT},
  48   {"default", DEFAULT},
  49   {"denies", DENIES},
  50   {"duration", DURATION},
  51   {"dynamicscript", DYNAMICSCRIPT},
  52   {"grobdescriptions", GROBDESCRIPTIONS},
  53   {"figures",FIGURES},
  54   {"grace", GRACE},
  55   {"glissando", GLISSANDO},
  56   {"header", HEADER},
  57   {"in", IN_T},
  58   {"lyrics", LYRICS},
  59   {"key", KEY},
  60   {"mark", MARK},
  61   {"once", ONCE},
  62   {"pitch", PITCH},
  63   {"time", TIME_T},
  64   {"times", TIMES},
  65   {"midi", MIDI},
  66   {"mm", MM_T},
  67   {"name", NAME},
  68   {"pitchnames", PITCHNAMES},
  69   {"notes", NOTES},
  70   {"outputproperty", OUTPUTPROPERTY},
  71   {"override", OVERRIDE},
  72   {"set", SET},
  73   {"rest", REST},
  74   {"revert", REVERT},
  75   {"partial", PARTIAL},
  76   {"paper", PAPER},
  77   {"penalty", PENALTY},
  78   {"property", PROPERTY},
  79   {"pt", PT_T},
  80   {"relative", RELATIVE},
  81   {"remove", REMOVE},
  82   {"repeat", REPEAT},
  83   {"addlyrics", ADDLYRICS},
  84   {"partcombine", PARTCOMBINE},
  85   {"score", SCORE},
  86   {"script", SCRIPT},
  87   {"stylesheet", STYLESHEET},
  88   {"skip", SKIP},
  89   {"tempo", TEMPO},
  90   {"translator", TRANSLATOR},
  91   {"transpose", TRANSPOSE},
  92   {"type", TYPE},
  93   {"unset", UNSET},
  94   {0,0}
  95 };
  96
  97 My_lily_lexer::My_lily_lexer ()
  98 {
  99   keytable_ = new Keyword_table (the_key_tab);
 100   toplevel_variable_tab_ = new Scheme_hash_table ;
 101   scopes_.push (toplevel_variable_tab_);
 102
 103   errorlevel_ = 0;
 104   main_input_b_ = false;
 105 }
 106
 107 int
 108 My_lily_lexer::lookup_keyword (String s)
 109 {
 110   return keytable_->lookup (s.to_str0 ());
 111 }
 112
 113 SCM
 114 My_lily_lexer::lookup_identifier (String s)
 115 {
 116   SCM sym = ly_symbol2scm (s.to_str0 ());
 117
 118   for (int i = scopes_.size (); i--;)
 119     {
 120       SCM val = SCM_UNSPECIFIED;
 121       if (scopes_[i]->try_retrieve (sym, &val))
 122         return val;
 123     }
 124   return SCM_UNSPECIFIED;
 125 }
 126
 127 void
 128 My_lily_lexer::start_main_input ()
 129 {
 130   new_input (main_input_string_, &global_input_file->sources_);
 131   allow_includes_b_ = allow_includes_b_ &&  ! (safe_global_b);
 132 }
 133
 134 void
 135 My_lily_lexer::set_identifier (SCM name, SCM s)
 136 {
 137   assert (gh_string_p (name));
 138
 139   if (lookup_keyword (ly_scm2string (name)) >= 0)
 140     {
 141       size_t sz;
 142       char * str = gh_scm2newstr (name, &sz) ;
 143       warning (_f ("Identifier name is a keyword: `%s'", str));
 144       free  (str);
 145     }
 146
 147   scopes_.top ()->set (scm_string_to_symbol (name), s);
 148 }
 149
 150 My_lily_lexer::~My_lily_lexer ()
 151 {
 152   delete keytable_;
 153   scm_gc_unprotect_object (toplevel_variable_tab_->self_scm ());
 154 }
 155
 156
 157
 158 void
 159 My_lily_lexer::LexerError (char const *s)
 160 {
 161   if (include_stack_.empty ())
 162     {
 163       progress_indication (_f ("error at EOF: %s", s)+ String ("\n"));
 164     }
 165   else
 166     {
 167       errorlevel_ |= 1;
 168       Input spot (get_source_file (),here_str0 ());
 169       spot.error (s);
 170     }
 171 }
 172
 173 char
 174 My_lily_lexer::escaped_char (char c) const
 175 {
 176   switch (c)
 177     {
 178     case 'n':
 179       return '\n';
 180     case 't':
 181       return '\t';
 182
 183     case '\'':
 184     case '\"':
 185     case '\\':
 186       return c;
 187     }
 188   return 0;
 189 }
 190
 191 Input
 192 My_lily_lexer::here_input () const
 193 {
 194   Source_file * f= get_source_file ();
 195   return Input (f, (char*)here_str0 ());
 196 }