2 includable-lexer.cc -- implement Includable_lexer
4 source file of the LilyPond music typesetter
6 (c) 1997--2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
12 #include "file-path.hh"
13 #include "includable-lexer.hh"
14 #include "source-file.hh"
19 #define YY_BUF_SIZE 16384
23 #define YY_START ((yy_start - 1) / 2)
24 #define YYSTATE YY_START
27 Includable_lexer::Includable_lexer ()
29 yy_current_buffer
= 0;
30 allow_includes_b_
= true;
33 /** set the new input to s, remember old file.
36 Includable_lexer::new_input (String s
, Sources
* global_sources
)
38 if (!allow_includes_b_
)
40 LexerError ("include files are disallowed.");
44 Source_file
* sl
= global_sources
->get_file_l (s
);
47 String msg
= _f ("Can't find file: `%s'", s
);
49 msg
+= _f ("(search path: `%s')", global_sources
->path_C_
->str ().ch_C());
51 LexerError (msg
.ch_C ());
55 filename_str_arr_
.push (sl
->name_str ());
57 char_count_stack_
.push (0);
58 if (yy_current_buffer
)
59 state_stack_
.push (yy_current_buffer
);
60 progress_indication (String ("[") + s
);
62 include_stack_
.push (sl
);
65 ugh. We'd want to create a buffer from the bytes directly.
67 Whoops. The size argument to yy_create_buffer is not the
68 filelength but a BUFFERSIZE. Maybe this is why reading stdin fucks up.
71 yy_switch_to_buffer (yy_create_buffer (sl
->istream_l (), YY_BUF_SIZE
));
75 Includable_lexer::new_input (String name
, String data
, Sources
* sources
)
77 Source_file
* file
= new Source_file (name
, data
);
79 filename_str_arr_
.push (name
);
81 char_count_stack_
.push (0);
82 if (yy_current_buffer
)
83 state_stack_
.push (yy_current_buffer
);
84 progress_indication (String ("[") + name
);
85 include_stack_
.push (file
);
87 yy_switch_to_buffer (yy_create_buffer (file
->istream_l (), YY_BUF_SIZE
));
90 /** pop the inputstack. conceptually this is a destructor, but it
91 does not destruct the Source_file that Includable_lexer::new_input creates. */
93 Includable_lexer::close_input ()
95 include_stack_
.pop ();
96 char_count_stack_
.pop ();
97 progress_indication ("]");
98 yy_delete_buffer (yy_current_buffer
);
99 yy_current_buffer
= 0;
100 if (state_stack_
.empty ())
102 yy_current_buffer
= 0;
107 yy_switch_to_buffer (state_stack_
.pop ());
113 Includable_lexer::here_ch_C () const
115 if (include_stack_
.empty ())
117 return include_stack_
.top ()->ch_C () + char_count_stack_
.top ();
120 Includable_lexer::~Includable_lexer ()
122 while (!include_stack_
.empty ())
128 Since we don't create the buffer state from the bytes directly, we
129 don't know about the location of the lexer. Add this as a
132 Includable_lexer::add_lexed_char (int count
)
134 char_count_stack_
.top () += count
;
138 Includable_lexer::source_file_l () const
140 if (include_stack_
.empty ())
143 return include_stack_
.top ();