lily/mylexer.cc

   1 #include <strstream.h>
   2
   3 #include "interval.hh"
   4 #include "identparent.hh"
   5 #include "assoc-iter.hh"
   6 #include "lexer.hh"
   7 #include "input-file.hh"
   8 #include "out/parser.hh"
   9 #include "keyword.hh"
  10 #include "assoc.hh"
  11 #include "lexer.hh"
  12 #include "debug.hh"
  13
  14 #include "source-file.hh"
  15 #include "parseconstruct.hh"
  16
  17 static Keyword_ent the_key_tab[]={
  18     "bar", BAR,
  19     "cadenza", CADENZA,
  20     "clef", CLEF,
  21     "cm", CM_T,
  22     "command", COMMAND,
  23     "commands", COMMANDS,
  24     "duration", DURATIONCOMMAND,
  25     "dynamic", DYNAMIC,
  26     "geometric", GEOMETRIC,
  27     "goto", GOTO,
  28     "in", IN_T,
  29     "key", KEY,
  30     "melodic" , MELODIC,
  31     "meter", METER,
  32     "midi", MIDI,
  33     "mm", MM_T,
  34     "multivoice", MULTIVOICE,
  35     "octave", OCTAVECOMMAND,
  36     "output", OUTPUT,
  37     "partial", PARTIAL,
  38     "paper", PAPER,
  39     "plet", PLET,
  40     "pt", PT_T,
  41     "score", SCORE,
  42     "script", SCRIPT,
  43     "skip", SKIP,
  44     "staff", STAFF,
  45     "start", START_T,
  46     "stem", STEM,
  47     "table", TABLE,
  48     "symboltables", SYMBOLTABLES,
  49     "tempo", TEMPO,
  50     "texid", TEXID,
  51     "textstyle", TEXTSTYLE,
  52     "unitspace", UNITSPACE,
  53     "voice", VOICE,
  54     "voices", VOICES,
  55     "width", WIDTH,
  56     "music", MUSIC,
  57     "grouping", GROUPING,
  58     0,0
  59 };
  60
  61 My_flex_lexer::My_flex_lexer()
  62 {
  63     keytable_p_ = new Keyword_table(the_key_tab);
  64     identifier_assoc_p_ = new Assoc<String, Identifier*>;
  65     errorlevel_i_ = 0;
  66 }
  67
  68 int
  69 My_flex_lexer::lookup_keyword(String s)
  70 {
  71     return keytable_p_->lookup(s);
  72 }
  73
  74 Identifier*
  75 My_flex_lexer::lookup_identifier(String s)
  76 {
  77     if (!identifier_assoc_p_->elt_query(s))
  78         return 0;
  79
  80     return (*identifier_assoc_p_)[s];
  81 }
  82
  83 char const*
  84 My_flex_lexer::here_ch_c_l()
  85 {
  86     return include_stack_.top()->sourcefile_l_->ch_c_l() + yyin->tellg();
  87 }
  88
  89 void
  90 My_flex_lexer::add_identifier(Identifier*i)
  91 {
  92     delete lookup_identifier(i->name);
  93     (*identifier_assoc_p_)[i->name] = i;
  94 }
  95
  96 My_flex_lexer::~My_flex_lexer()
  97 {
  98     delete keytable_p_;
  99
 100     for (Assoc_iter<String,Identifier*>
 101              ai(*identifier_assoc_p_); ai.ok(); ai++) {
 102         mtor << "deleting: " << ai.key()<<'\n';
 103         delete ai.val();
 104     }
 105     delete identifier_assoc_p_;
 106 }
 107 void
 108 My_flex_lexer::print_declarations()const
 109 {
 110     for (Assoc_iter<String,Identifier*> ai(*identifier_assoc_p_); ai.ok(); ai++) {
 111         ai.val()->print();
 112     }
 113 }
 114
 115 String
 116 My_flex_lexer::spot()const
 117 {
 118     return include_stack_.top()->name +  ": " + String( lineno() );
 119 }
 120
 121 void
 122 My_flex_lexer::LexerError(const char *s)
 123 {
 124     if (lexer->include_stack_.empty()) {
 125         *mlog << "error at EOF" << s << '\n';
 126     } else {
 127         char const* ch_c_l = here_ch_c_l();
 128         if ( ch_c_l ) {
 129             ch_c_l--;
 130             while ( ( *ch_c_l == ' ' ) || ( *ch_c_l == '\t' ) || ( *ch_c_l == '\n' ) )
 131                     ch_c_l--;
 132             ch_c_l++;
 133         }
 134         errorlevel_i_ |= 1;
 135         error( s, ch_c_l );
 136     }
 137 }
 138
 139 // set the  new input to s, remember old file.
 140 void
 141 My_flex_lexer::new_input(String s)
 142 {
 143    if (!include_stack_.empty()) {
 144         include_stack_.top()->line = lineno();
 145              // should this be saved at all?
 146         include_stack_.top()->defined_ch_c_l_ = defined_ch_c_l;
 147    }
 148
 149    Input_file *newin = new Input_file(s);
 150    include_stack_.push(newin);
 151    switch_streams(newin->is);
 152
 153    yylineno = 1;
 154 }
 155
 156 // pop the inputstack.
 157 bool
 158 My_flex_lexer::close_input()
 159 {
 160     Input_file *old = include_stack_.pop();
 161      bool ok =  true;
 162     if (include_stack_.empty()) {
 163         ok = false;
 164     } else {
 165         Input_file *i = include_stack_.top();
 166         switch_streams(i->is);
 167         yylineno = i->line;
 168         defined_ch_c_l = i->defined_ch_c_l_;
 169     }
 170     delete old;
 171     return ok;
 172 }