2 includable-lexer.cc -- implement Includable_lexer
4 source file of the LilyPond music typesetter
6 (c) 1997--1999 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 *mlog << "[" << s<< flush;
61 include_stack_.push (sl);
64 ugh. We'd want to create a buffer from the bytes directly.
66 Whoops. The size argument to yy_create_buffer is not the
67 filelength but a BUFFERSIZE. Maybe this is why reading stdin fucks up.
70 yy_switch_to_buffer (yy_create_buffer (sl->istream_l (), YY_BUF_SIZE));
74 Includable_lexer::new_input (String name, String data, Sources* sources)
76 Source_file* file = new Source_file (name, data);
78 filename_str_arr_.push (name);
80 char_count_stack_.push (0);
81 if (yy_current_buffer)
82 state_stack_.push (yy_current_buffer);
83 *mlog << "[" << name << flush;
84 include_stack_.push (file);
86 yy_switch_to_buffer (yy_create_buffer (file->istream_l (), YY_BUF_SIZE));
89 /** pop the inputstack. conceptually this is a destructor, but it
90 does not destruct the Source_file that Includable_lexer::new_input creates. */
92 Includable_lexer::close_input ()
94 include_stack_.pop ();
95 char_count_stack_.pop ();
97 yy_delete_buffer (yy_current_buffer);
98 yy_current_buffer = 0;
99 if (state_stack_.empty ())
101 yy_current_buffer = 0;
106 yy_switch_to_buffer (state_stack_.pop ());
112 Includable_lexer::here_ch_C () const
114 if (include_stack_.empty ())
116 return include_stack_.top ()->ch_C () + char_count_stack_.top ();
119 Includable_lexer::~Includable_lexer ()
121 while (!include_stack_.empty ())
127 Since we don't create the buffer state from the bytes directly, we
128 don't know about the location of the lexer. Add this as a
131 Includable_lexer::add_lexed_char (int count)
133 char_count_stack_.top () += count;
137 Includable_lexer::source_file_l () const
139 if (include_stack_.empty ())
142 return include_stack_.top ();