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--2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7 */
   8
   9 #include <strstream.h>
  10 #include <ctype.h>
  11
  12 #include "interval.hh"
  13 #include "identifier.hh"
  14 #include "lily-guile.hh"
  15 #include "parser.hh"
  16 #include "keyword.hh"
  17 #include "my-lily-lexer.hh"
  18 #include "debug.hh"
  19 #include "source-file.hh"
  20 #include "main.hh"
  21 #include "scope.hh"
  22 #include "input.hh"
  23 #include "moment.hh"
  24
  25 static Keyword_ent the_key_tab[]={
  26   {"autochange", AUTOCHANGE},
  27   {"arpeggio", ARPEGGIO },
  28   {"spanrequest", SPANREQUEST},
  29   {"commandspanrequest", COMMANDSPANREQUEST},
  30   {"simultaneous", SIMULTANEOUS},
  31   {"sequential", SEQUENTIAL},
  32   {"accepts", ACCEPTS},
  33   {"alternative", ALTERNATIVE},
  34   {"bar", BAR},
  35   {"breathe", BREATHE},
  36   {"char", CHAR_T},
  37   {"chordmodifiers", CHORDMODIFIERS},
  38   {"chords", CHORDS},
  39   {"clef", CLEF},
  40   {"cm", CM_T},
  41   {"consists", CONSISTS},
  42   {"consistsend", CONSISTSEND},
  43   {"context", CONTEXT},
  44   {"denies", DENIES},
  45   {"duration", DURATION},
  46   {"dynamicscript", DYNAMICSCRIPT},
  47   {"elementdescriptions", ELEMENTDESCRIPTIONS},
  48   {"font", FONT},
  49   {"grace", GRACE},
  50   {"header", HEADER},
  51   {"in", IN_T},
  52   {"lyrics", LYRICS},
  53   {"key", KEY},
  54   {"mark", MARK},
  55   {"musicalpitch", MUSICAL_PITCH},
  56   {"time", TIME_T},
  57   {"times", TIMES},
  58   {"midi", MIDI},
  59   {"mm", MM_T},
  60   {"name", NAME},
  61   {"notenames", NOTENAMES},
  62   {"notes", NOTES},
  63   {"outputproperty", OUTPUTPROPERTY},
  64   {"push", PUSH},
  65   {"pop", POP},
  66   {"partial", PARTIAL},
  67   {"paper", PAPER},
  68   {"penalty", PENALTY},
  69   {"property", PROPERTY},
  70   {"pt", PT_T},
  71   {"relative", RELATIVE},
  72   {"remove", REMOVE},
  73   {"repeat", REPEAT},
  74   {"addlyrics", ADDLYRICS},
  75   {"partcombine", PARTCOMBINE},
  76   {"score", SCORE},
  77   {"script", SCRIPT},
  78   {"stylesheet", STYLESHEET},
  79   {"skip", SKIP},
  80   {"textscript", TEXTSCRIPT},
  81   {"tempo", TEMPO},
  82   {"translator", TRANSLATOR},
  83   {"transpose", TRANSPOSE},
  84   {"type", TYPE},
  85   {0,0}
  86 };
  87
  88 My_lily_lexer::My_lily_lexer()
  89 {
  90   keytable_p_ = new Keyword_table (the_key_tab);
  91   toplevel_scope_p_ = new Scope;
  92   scope_l_arr_.push (toplevel_scope_p_);
  93   errorlevel_i_ = 0;
  94   main_input_b_ = false;
  95 }
  96
  97 int
  98 My_lily_lexer::lookup_keyword (String s)
  99 {
 100   return keytable_p_->lookup (s.ch_C ());
 101 }
 102
 103 SCM
 104 My_lily_lexer::lookup_identifier (String s)
 105 {
 106   SCM sym = ly_symbol2scm (s.ch_C());
 107
 108   for (int i = scope_l_arr_.size (); i--; )
 109     {
 110       SCM val = SCM_UNSPECIFIED;
 111       if (scope_l_arr_[i]->try_retrieve (sym, &val))
 112         return val;
 113     }
 114   return SCM_UNSPECIFIED;
 115 }
 116
 117 void
 118 My_lily_lexer::start_main_input ()
 119 {
 120   new_input (main_input_str_, source_global_l);
 121   allow_includes_b_ = allow_includes_b_ &&  !(safe_global_b);
 122 }
 123
 124 void
 125 My_lily_lexer::set_identifier (String name_str, SCM s)
 126 {
 127   if (lookup_keyword (name_str) >= 0)
 128     {
 129       warning (  _f ("Identifier name is a keyword: `%s'", name_str));
 130     }
 131
 132   scope_l_arr_.top ()->set (name_str, s);
 133 }
 134
 135 My_lily_lexer::~My_lily_lexer()
 136 {
 137   delete keytable_p_;
 138   delete toplevel_scope_p_ ;
 139 }
 140
 141
 142
 143 void
 144 My_lily_lexer::LexerError (char const *s)
 145 {
 146   if (include_stack_.empty())
 147     {
 148       progress_indication (_f ("error at EOF: %s", s)+ String ("\n"));
 149     }
 150   else
 151     {
 152       errorlevel_i_ |= 1;
 153       Input spot (source_file_l(),here_ch_C());
 154       spot.error (s);
 155     }
 156 }
 157
 158 char
 159 My_lily_lexer::escaped_char(char c) const
 160 {
 161   switch(c)
 162     {
 163     case 'n':
 164       return '\n';
 165     case 't':
 166       return '\t';
 167
 168     case '\'':
 169     case '\"':
 170     case '\\':
 171       return c;
 172     }
 173   return 0;
 174 }
 175
 176 Input
 177 My_lily_lexer::here_input () const
 178 {
 179   Source_file * f_l= source_file_l ();
 180   return Input (f_l, (char*)here_ch_C ());
 181 }