2 source-file.cc -- implement Source_file
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2004 Jan Nieuwenhuizen <janneke@gnu.org>
7 Han-Wen Nienhuys <hanwen@cs.uu.nl>
18 #define istringstream(x) istrstream(x, length ())
22 #include "flower-proto.hh"
24 #include "source-file.hh"
28 Source_file::load_stdin ()
33 Array<char> chs; // ugh.
34 while ((c = fgetc (stdin)) != EOF)
38 length_ = chs.size ();
39 contents_str0_ = chs.remove_array ();
43 gulp_file (String filename, int *filesize)
45 /* "b" must ensure to open literally, avoiding text (CR/LF)
47 FILE *f = fopen (filename.to_str0 (), "rb");
50 warning (_f ("can't open file: `%s'", filename.to_str0 ()));
54 fseek (f, 0, SEEK_END);
55 *filesize = ftell (f);
58 char *str = new char[*filesize + 1];
61 int bytes_read = fread (str, sizeof (char), *filesize, f);
62 if (bytes_read != *filesize)
63 warning (_f ("Huh? Got %d, expected %d characters", bytes_read,
70 Source_file::Source_file (String filename, String data)
74 contents_str0_ = data.get_copy_str0();
75 length_ = data.length ();
76 pos_str0_ = to_str0 ();
80 Source_file::Source_file (String filename_string)
82 name_ = filename_string;
86 if (filename_string == "-")
89 contents_str0_ = gulp_file (filename_string, &length_);
91 pos_str0_ = to_str0 ();
95 for (int i = 0; i < length_; i++)
96 if (contents_str0_[i] == '\n')
97 newline_locations_.push (contents_str0_ + i);
101 Source_file::init_port ()
103 SCM str = scm_makfrom0str (contents_str0_);
104 str_port_ = scm_mkstrport (SCM_INUM0, str, SCM_OPN | SCM_RDNG, __FUNCTION__);
105 scm_set_port_filename_x (str_port_, scm_makfrom0str (name_.get_str0 ()));
109 Source_file::tell () const
111 return pos_str0_ - contents_str0_;
115 Source_file::get_istream ()
119 if (length ()) // can-t this be done without such a hack?
120 istream_ = new std::istringstream (to_str0 ());
123 istream_ = new std::istringstream ("");
124 istream_->setstate (std::ios::eofbit);
125 // istream_->set (ios::eofbit);
132 Source_file::file_line_column_string (char const *context_str0) const
135 return " (" + _ ("position unknown") + ")";
137 return name_string () + ":" + to_string (get_line (context_str0))
138 + ":" + to_string (get_char (context_str0));
142 Source_file::name_string () const
147 Source_file::~Source_file ()
151 delete[] contents_str0_;
155 Source_file::line_slice (char const* pos_str0) const
157 if (!contains (pos_str0))
160 char const* data_str0 = to_str0 ();
161 char const * eof_C_ = data_str0 + length ();
163 if (pos_str0 == eof_C_)
165 char const* begin_str0 = pos_str0;
166 while (begin_str0 > data_str0)
167 if (*--begin_str0 == '\n')
173 char const* end_str0 = pos_str0;
174 while (end_str0 < eof_C_)
175 if (*end_str0++ == '\n')
181 return Slice (begin_str0 - data_str0, end_str0 - data_str0);
185 Source_file::line_string (char const* pos_str0) const
187 if (!contains (pos_str0))
190 Slice line = line_slice (pos_str0);
191 char const* data_str0 = to_str0 ();
192 return String ((Byte const*)data_str0 + line[LEFT], line.length ());
196 Source_file::get_char (char const* pos_str0) const
198 if (!contains (pos_str0))
201 char const* data_str0 = to_str0 ();
202 return pos_str0 - (line_slice (pos_str0)[SMALLER] + data_str0);
206 Source_file::get_column (char const* pos_str0) const
208 if (!contains (pos_str0))
211 int ch_i = get_char (pos_str0);
212 String line = line_string (pos_str0);
215 for (int i = 0; i < ch_i; i++)
217 col_i = (col_i / 8 + 1) * 8;
225 Source_file::error_string (char const* pos_str0) const
227 if (!contains (pos_str0))
228 return " (" + _ ("position unknown") + ")";
230 int ch_i = get_char (pos_str0);
231 String line = line_string (pos_str0);
232 String context = line.left_string (ch_i)
234 + to_string (' ', get_column (pos_str0))
235 + line.cut_string (ch_i, INT_MAX);
241 Source_file::contains (char const* pos_str0) const
243 return (pos_str0 && (pos_str0 >= to_str0 ()) && (pos_str0 <= to_str0 () + length ()));
247 Source_file::get_line (char const* pos_str0) const
249 if (!contains (pos_str0))
252 if (!newline_locations_.size ())
256 int hi = newline_locations_.size ();
258 if (newline_locations_[lo] > pos_str0)
261 if (newline_locations_[hi-1] < pos_str0)
264 binary_search_bounds (newline_locations_,
266 Link_array<char>::default_compare,
269 if (*pos_str0 == '\n')
275 Source_file::length () const
281 Source_file::to_str0 () const
283 return contents_str0_;
287 Source_file::set_pos (char const * pos_str0)
289 if (contains (pos_str0))
290 pos_str0_ = pos_str0;
292 error (error_string (pos_str0) + "invalid pos");
296 Source_file::seek_str0 (int n)
298 char const* new_str0 = to_str0 () + n;
300 new_str0 += length ();
301 if (contains (new_str0))
302 pos_str0_ = new_str0;
304 error (error_string (new_str0) + "seek past eof");
310 Source_file::forward_str0 (int n)
312 char const* old_pos = pos_str0_;
313 char const* new_str0 = pos_str0_ + n;
314 if (contains (new_str0))
315 pos_str0_ = new_str0;
317 error (error_string (new_str0) + "forward past eof");
323 Source_file::get_string (int n)
325 String str = String ((Byte const*)forward_str0 (n), n);