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