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   {"spanrequest", SPANREQUEST},
  28   {"commandspanrequest", COMMANDSPANREQUEST},
  29   {"simultaneous", SIMULTANEOUS},
  30   {"sequential", SEQUENTIAL},
  31   {"accepts", ACCEPTS},
  32   {"alternative", ALTERNATIVE},
  33   {"bar", BAR},
  34   {"breathe", BREATHE},
  35   {"char", CHAR_T},
  36   {"chordmodifiers", CHORDMODIFIERS},
  37   {"chords", CHORDS},
  38   {"clef", CLEF},
  39   {"cm", CM_T},
  40   {"consists", CONSISTS},
  41   {"consistsend", CONSISTSEND},
  42   {"context", CONTEXT},
  43   {"duration", DURATION},
  44   {"font", FONT},
  45   {"grace", GRACE},
  46   {"header", HEADER},
  47   {"in", IN_T},
  48   {"lyrics", LYRICS},
  49   {"key", KEY},
  50   {"mark", MARK},
  51   {"musicalpitch", MUSICAL_PITCH},
  52   {"time", TIME_T},
  53   {"times", TIMES},
  54   {"midi", MIDI},
  55   {"mm", MM_T},
  56   {"name", NAME},
  57   {"notenames", NOTENAMES},
  58   {"notes", NOTES},
  59   {"outputproperty", OUTPUTPROPERTY},
  60   {"partial", PARTIAL},
  61   {"paper", PAPER},
  62   {"penalty", PENALTY},
  63   {"property", PROPERTY},
  64   {"pt", PT_T},
  65   {"relative", RELATIVE},
  66   {"remove", REMOVE},
  67   {"repeat", REPEAT},
  68   {"addlyrics", ADDLYRICS},
  69   {"score", SCORE},
  70   {"script", SCRIPT},
  71   {"skip", SKIP},
  72   {"textscript", TEXTSCRIPT},
  73   {"tempo", TEMPO},
  74   {"translator", TRANSLATOR},
  75   {"transpose", TRANSPOSE},
  76   {"type", TYPE},
  77   {0,0}
  78 };
  79
  80 My_lily_lexer::My_lily_lexer()
  81 {
  82   keytable_p_ = new Keyword_table (the_key_tab);
  83   toplevel_scope_p_ = new Scope;
  84   scope_l_arr_.push (toplevel_scope_p_);
  85   errorlevel_i_ = 0;
  86   main_input_b_ = false;
  87 }
  88
  89 int
  90 My_lily_lexer::lookup_keyword (String s)
  91 {
  92   return keytable_p_->lookup (s.ch_C ());
  93 }
  94
  95 SCM
  96 My_lily_lexer::lookup_identifier (String s)
  97 {
  98   SCM sym = ly_symbol2scm (s.ch_C());
  99
 100   for (int i = scope_l_arr_.size (); i--; )
 101     if (scope_l_arr_[i]->elem_b (sym))
 102       return scope_l_arr_[i]->scm_elem(sym);
 103   return SCM_UNDEFINED;
 104 }
 105
 106 void
 107 My_lily_lexer::start_main_input ()
 108 {
 109   new_input (main_input_str_, source_global_l);
 110   allow_includes_b_ = allow_includes_b_ &&  !(safe_global_b);
 111 }
 112
 113 void
 114 My_lily_lexer::set_identifier (String name_str, SCM s)
 115 {
 116   if (lookup_keyword (name_str) >= 0)
 117     {
 118       warning (  _f ("Identifier name is a keyword: `%s'", name_str));
 119     }
 120
 121   scope_l_arr_.top ()->set (name_str, s);
 122 }
 123
 124 My_lily_lexer::~My_lily_lexer()
 125 {
 126   delete keytable_p_;
 127   delete toplevel_scope_p_ ;
 128 }
 129
 130
 131
 132 void
 133 My_lily_lexer::LexerError (char const *s)
 134 {
 135   if (include_stack_.empty())
 136     {
 137       progress_indication (_f ("error at EOF: %s", s)+ String ("\n"));
 138     }
 139   else
 140     {
 141       errorlevel_i_ |= 1;
 142       Input spot (source_file_l(),here_ch_C());
 143       spot.error (s);
 144     }
 145 }
 146
 147 char
 148 My_lily_lexer::escaped_char(char c) const
 149 {
 150   switch(c)
 151     {
 152     case 'n':
 153       return '\n';
 154     case 't':
 155       return '\t';
 156
 157     case '\'':
 158     case '\"':
 159     case '\\':
 160       return c;
 161     }
 162   return 0;
 163 }
 164
 165 Input
 166 My_lily_lexer::here_input () const
 167 {
 168   Source_file * f_l= source_file_l ();
 169   return Input (f_l, (char*)here_ch_C ());
 170 }