2 includable-lexer.cc -- implement Includable_lexer
4 source file of the LilyPond music typesetter
6 (c) 1997--2008 Han-Wen Nienhuys <hanwen@xs4all.nl>
9 #include "includable-lexer.hh"
16 #include "file-name.hh"
17 #include "file-path.hh"
18 #include "international.hh"
20 #include "source-file.hh"
25 #define YY_BUF_SIZE 16384
31 #define YYSTATE YY_START
34 /* Flex >= 2.5.29 has include stack; but we don't use that yet. */
35 #if !HAVE_FLEXLEXER_YY_CURRENT_BUFFER
36 #define yy_current_buffer \
37 (yy_buffer_stack != 0 ? yy_buffer_stack[yy_buffer_stack_top] : 0)
40 Includable_lexer::Includable_lexer ()
42 #if HAVE_FLEXLEXER_YY_CURRENT_BUFFER
43 yy_current_buffer = 0;
47 /** Set the new input file to NAME, remember old file. */
49 Includable_lexer::new_input (string name, Sources *sources)
51 string current_dir = include_stack_.size () ?
52 dir_name (include_stack_.back ()->name_string ()) : "";
54 Source_file *file = sources->get_file (name, current_dir);
57 string msg = _f ("cannot find file: `%s'", name);
59 msg += _f ("(search path: `%s')",
60 (current_dir.length () ? (current_dir + PATHSEP) : "") + sources->path_->to_string ().c_str ());
61 LexerError (msg.c_str ());
64 file_name_strings_.push_back (file->name_string ());
66 char_count_stack_.push_back (0);
67 if (yy_current_buffer)
68 state_stack_.push_back (yy_current_buffer);
70 if (be_verbose_global)
71 progress_indication (string ("[") + file->name_string ());
73 include_stack_.push_back (file);
75 /* Ugh. We'd want to create a buffer from the bytes directly.
77 Whoops. The size argument to yy_create_buffer is not the
78 filelength but a BUFFERSIZE. Maybe this is why reading stdin fucks up. */
79 yy_switch_to_buffer (yy_create_buffer (file->get_istream (), YY_BUF_SIZE));
83 Includable_lexer::new_input (string name, string data, Sources *sources)
85 Source_file *file = new Source_file (name, data);
87 file_name_strings_.push_back (name);
89 char_count_stack_.push_back (0);
90 if (yy_current_buffer)
91 state_stack_.push_back (yy_current_buffer);
93 if (be_verbose_global)
94 progress_indication (string ("[") + name);
95 include_stack_.push_back (file);
97 yy_switch_to_buffer (yy_create_buffer (file->get_istream (), YY_BUF_SIZE));
100 /** pop the inputstack. conceptually this is a destructor, but it
101 does not destruct the Source_file that Includable_lexer::new_input
104 Includable_lexer::close_input ()
106 include_stack_.pop_back ();
107 char_count_stack_.pop_back ();
108 if (be_verbose_global)
109 progress_indication ("]");
110 yy_delete_buffer (yy_current_buffer);
111 #if HAVE_FLEXLEXER_YY_CURRENT_BUFFER
112 yy_current_buffer = 0;
114 if (state_stack_.empty ())
116 #if HAVE_FLEXLEXER_YY_CURRENT_BUFFER
117 yy_current_buffer = 0;
121 yy_switch_to_buffer (state_stack_.back ());
122 state_stack_.pop_back ();
127 Includable_lexer::here_str0 () const
129 if (include_stack_.empty ())
131 return include_stack_.back ()->c_str () + char_count_stack_.back ();
134 Includable_lexer::~Includable_lexer ()
136 while (!include_stack_.empty ())
141 Includable_lexer::get_source_file () const
143 if (include_stack_.empty ())
145 return include_stack_.back ();