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--2001 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   {"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   {"elementdescriptions", ELEMENTDESCRIPTIONS},
  53   {"font", FONT},
  54   {"grace", GRACE},
  55   {"ngrace", NGRACE},
  56   {"glissando", GLISSANDO},
  57   {"header", HEADER},
  58   {"in", IN_T},
  59   {"lyrics", LYRICS},
  60   {"key", KEY},
  61   {"mark", MARK},
  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   {"revert", REVERT},
  74   {"partial", PARTIAL},
  75   {"paper", PAPER},
  76   {"penalty", PENALTY},
  77   {"property", PROPERTY},
  78   {"pt", PT_T},
  79   {"relative", RELATIVE},
  80   {"remove", REMOVE},
  81   {"repeat", REPEAT},
  82   {"addlyrics", ADDLYRICS},
  83   {"partcombine", PARTCOMBINE},
  84   {"score", SCORE},
  85   {"script", SCRIPT},
  86   {"stylesheet", STYLESHEET},
  87   {"skip", SKIP},
  88   {"tempo", TEMPO},
  89   {"translator", TRANSLATOR},
  90   {"transpose", TRANSPOSE},
  91   {"type", TYPE},
  92   {"unset", UNSET},
  93   {0,0}
  94 };
  95
  96 My_lily_lexer::My_lily_lexer ()
  97 {
  98   keytable_p_ = new Keyword_table (the_key_tab);
  99   toplevel_variable_tab_ = new Scheme_hash_table ;
 100   scope_p_ = new Scope (toplevel_variable_tab_);
 101
 102   scope_l_arr_.push (scope_p_);
 103
 104   errorlevel_i_ = 0;
 105   main_input_b_ = false;
 106 }
 107
 108 int
 109 My_lily_lexer::lookup_keyword (String s)
 110 {
 111   return keytable_p_->lookup (s.ch_C ());
 112 }
 113
 114 SCM
 115 My_lily_lexer::lookup_identifier (String s)
 116 {
 117   SCM sym = ly_symbol2scm (s.ch_C ());
 118
 119   for (int i = scope_l_arr_.size (); i--;)
 120     {
 121       SCM val = SCM_UNSPECIFIED;
 122       if (scope_l_arr_[i]->try_retrieve (sym, &val))
 123         return val;
 124     }
 125   return SCM_UNSPECIFIED;
 126 }
 127
 128 void
 129 My_lily_lexer::start_main_input ()
 130 {
 131   new_input (main_input_str_, source_global_l);
 132   allow_includes_b_ = allow_includes_b_ &&  ! (safe_global_b);
 133 }
 134
 135 void
 136 My_lily_lexer::set_identifier (String name_str, SCM s)
 137 {
 138   if (lookup_keyword (name_str) >= 0)
 139     {
 140       warning (_f ("Identifier name is a keyword: `%s'", name_str));
 141     }
 142
 143   scope_l_arr_.top ()->set (name_str, s);
 144 }
 145
 146 My_lily_lexer::~My_lily_lexer ()
 147 {
 148   delete keytable_p_;
 149   scm_gc_unprotect_object (toplevel_variable_tab_->self_scm ());
 150   delete scope_p_ ;
 151 }
 152
 153
 154
 155 void
 156 My_lily_lexer::LexerError (char const *s)
 157 {
 158   if (include_stack_.empty ())
 159     {
 160       progress_indication (_f ("error at EOF: %s", s)+ String ("\n"));
 161     }
 162   else
 163     {
 164       errorlevel_i_ |= 1;
 165       Input spot (source_file_l (),here_ch_C ());
 166       spot.error (s);
 167     }
 168 }
 169
 170 char
 171 My_lily_lexer::escaped_char (char c) const
 172 {
 173   switch (c)
 174     {
 175     case 'n':
 176       return '\n';
 177     case 't':
 178       return '\t';
 179
 180     case '\'':
 181     case '\"':
 182     case '\\':
 183       return c;
 184     }
 185   return 0;
 186 }
 187
 188 Input
 189 My_lily_lexer::here_input () const
 190 {
 191   Source_file * f_l= source_file_l ();
 192   return Input (f_l, (char*)here_ch_C ());
 193 }