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