2 includable-lexer.cc -- implement Includable_lexer
4 source file of the LilyPond music typesetter
6 (c) 1997--2001 Han-Wen Nienhuys <hanwen@cs.uu.nl>
12 #include "file-path.hh"
13 #include "includable-lexer.hh"
14 #include "source-file.hh"
20 #define YY_BUF_SIZE 16384
24 #define YY_START() ((yy_start - 1) / 2)
25 #define YYSTATE YY_START
28 Includable_lexer::Includable_lexer ()
30 yy_current_buffer = 0;
31 allow_includes_b_ = true;
34 /** set the new input to s, remember old file.
37 Includable_lexer::new_input (String s, Sources * global_sources)
39 if (!allow_includes_b_)
41 LexerError ("include files are disallowed.");
45 Source_file * sl = global_sources->get_file_l (s);
48 String msg = _f ("can't find file: `%s'", s);
50 msg += _f ("(search path: `%s')", global_sources->path_C_->str ().ch_C ());
52 LexerError (msg.ch_C ());
56 filename_str_arr_.push (sl->name_str ());
58 char_count_stack_.push (0);
59 if (yy_current_buffer)
60 state_stack_.push (yy_current_buffer);
63 progress_indication (String ("[") + s);
65 include_stack_.push (sl);
68 ugh. We'd want to create a buffer from the bytes directly.
70 Whoops. The size argument to yy_create_buffer is not the
71 filelength but a BUFFERSIZE. Maybe this is why reading stdin fucks up.
74 yy_switch_to_buffer (yy_create_buffer (sl->istream_l (), YY_BUF_SIZE));
78 Includable_lexer::new_input (String name, String data, Sources* sources)
80 Source_file* file = new Source_file (name, data);
82 filename_str_arr_.push (name);
84 char_count_stack_.push (0);
85 if (yy_current_buffer)
86 state_stack_.push (yy_current_buffer);
89 progress_indication (String ("[") + name);
90 include_stack_.push (file);
92 yy_switch_to_buffer (yy_create_buffer (file->istream_l (), YY_BUF_SIZE));
95 /** pop the inputstack. conceptually this is a destructor, but it
96 does not destruct the Source_file that Includable_lexer::new_input creates. */
98 Includable_lexer::close_input ()
100 include_stack_.pop ();
101 char_count_stack_.pop ();
102 if (verbose_global_b)
103 progress_indication ("]");
104 yy_delete_buffer (yy_current_buffer);
105 yy_current_buffer = 0;
106 if (state_stack_.empty ())
108 yy_current_buffer = 0;
113 yy_switch_to_buffer (state_stack_.pop ());
119 Includable_lexer::here_ch_C () const
121 if (include_stack_.empty ())
123 return include_stack_.top ()->ch_C () + char_count_stack_.top ();
126 Includable_lexer::~Includable_lexer ()
128 while (!include_stack_.empty ())
134 Since we don't create the buffer state from the bytes directly, we
135 don't know about the location of the lexer. Add this as a
138 Includable_lexer::add_lexed_char (int count)
140 char_count_stack_.top () += count;
144 Includable_lexer::source_file_l () const
146 if (include_stack_.empty ())
149 return include_stack_.top ();