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