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);
48 msg += _f ("\nSearch path is `%s'\n", global_sources->path_C_->str ().ch_C());
49 LexerError (msg.ch_C ());
53 filename_str_arr_.push (sl->name_str ());
55 char_count_stack_.push (0);
56 if (yy_current_buffer)
57 state_stack_.push (yy_current_buffer);
58 *mlog << "[" << s<< flush;
59 include_stack_.push (sl);
62 ugh. We'd want to create a buffer from the bytes directly.
64 Whoops. The size argument to yy_create_buffer is not the
65 filelength but a BUFFERSIZE. Maybe this is why reading stdin fucks up.
68 yy_switch_to_buffer (yy_create_buffer (sl->istream_l (), YY_BUF_SIZE));
72 Includable_lexer::new_input (String name, String data, Sources* sources)
74 Source_file* file = new Source_file (name, data);
76 filename_str_arr_.push (name);
78 char_count_stack_.push (0);
79 if (yy_current_buffer)
80 state_stack_.push (yy_current_buffer);
81 *mlog << "[" << name << flush;
82 include_stack_.push (file);
84 yy_switch_to_buffer (yy_create_buffer (file->istream_l (), YY_BUF_SIZE));
87 /** pop the inputstack. conceptually this is a destructor, but it
88 does not destruct the Source_file that Includable_lexer::new_input creates. */
90 Includable_lexer::close_input ()
92 include_stack_.pop ();
93 char_count_stack_.pop ();
95 yy_delete_buffer (yy_current_buffer);
96 yy_current_buffer = 0;
97 if (state_stack_.empty ())
99 yy_current_buffer = 0;
104 yy_switch_to_buffer (state_stack_.pop ());
110 Includable_lexer::here_ch_C () const
112 if (include_stack_.empty ())
114 return include_stack_.top ()->ch_C () + char_count_stack_.top ();
117 Includable_lexer::~Includable_lexer ()
119 while (!include_stack_.empty ())
125 Since we don't create the buffer state from the bytes directly, we
126 don't know about the location of the lexer. Add this as a
129 Includable_lexer::add_lexed_char (int count)
131 char_count_stack_.top () += count;
135 Includable_lexer::source_file_l () const
137 if (include_stack_.empty ())
140 return include_stack_.top ();