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>
10 #include "source-file.hh"
19 #define istringstream(x) istrstream(x, length ())
25 Source_file::load_stdin ()
30 Array<char> chs; // ugh.
31 while ((c = fgetc (stdin)) != EOF)
35 length_ = chs.size ();
36 contents_str0_ = chs.remove_array ();
40 gulp_file (String filename, int *filesize)
42 /* "b" must ensure to open literally, avoiding text (CR/LF)
44 FILE *f = fopen (filename.to_str0 (), "rb");
47 warning (_f ("can't open file: `%s'", filename.to_str0 ()));
51 fseek (f, 0, SEEK_END);
52 *filesize = ftell (f);
55 char *str = new char[*filesize + 1];
58 int bytes_read = fread (str, sizeof (char), *filesize, f);
59 if (bytes_read != *filesize)
60 warning (_f ("Huh? Got %d, expected %d characters", bytes_read,
67 Source_file::Source_file (String filename, String data)
71 contents_str0_ = data.get_copy_str0();
72 length_ = data.length ();
73 pos_str0_ = to_str0 ();
77 Source_file::Source_file (String filename_string)
79 name_ = filename_string;
83 if (filename_string == "-")
86 contents_str0_ = gulp_file (filename_string, &length_);
88 pos_str0_ = to_str0 ();
92 for (int i = 0; i < length_; i++)
93 if (contents_str0_[i] == '\n')
94 newline_locations_.push (contents_str0_ + i);
98 Source_file::init_port ()
100 SCM str = scm_makfrom0str (contents_str0_);
101 str_port_ = scm_mkstrport (SCM_INUM0, str, SCM_OPN | SCM_RDNG, __FUNCTION__);
102 scm_set_port_filename_x (str_port_, scm_makfrom0str (name_.get_str0 ()));
106 Source_file::tell () const
108 return pos_str0_ - contents_str0_;
112 Source_file::get_istream ()
116 if (length ()) // can-t this be done without such a hack?
117 istream_ = new std::istringstream (to_str0 ());
120 istream_ = new std::istringstream ("");
121 istream_->setstate (std::ios::eofbit);
122 // istream_->set (ios::eofbit);
129 Source_file::file_line_column_string (char const *context_str0) const
132 return " (" + _ ("position unknown") + ")";
134 return name_string () + ":" + to_string (get_line (context_str0))
135 + ":" + to_string (get_char (context_str0));
139 Source_file::name_string () const
144 Source_file::~Source_file ()
148 delete[] contents_str0_;
152 Source_file::line_slice (char const* pos_str0) const
154 if (!contains (pos_str0))
157 char const* data_str0 = to_str0 ();
158 char const * eof_C_ = data_str0 + length ();
160 if (pos_str0 == eof_C_)
162 char const* begin_str0 = pos_str0;
163 while (begin_str0 > data_str0)
164 if (*--begin_str0 == '\n')
170 char const* end_str0 = pos_str0;
171 while (end_str0 < eof_C_)
172 if (*end_str0++ == '\n')
178 return Slice (begin_str0 - data_str0, end_str0 - data_str0);
182 Source_file::line_string (char const* pos_str0) const
184 if (!contains (pos_str0))
187 Slice line = line_slice (pos_str0);
188 char const* data_str0 = to_str0 ();
189 return String ((Byte const*)data_str0 + line[LEFT], line.length ());
193 Source_file::get_char (char const* pos_str0) const
195 if (!contains (pos_str0))
198 char const* data_str0 = to_str0 ();
199 return pos_str0 - (line_slice (pos_str0)[SMALLER] + data_str0);
203 Source_file::get_column (char const* pos_str0) const
205 if (!contains (pos_str0))
208 int ch_i = get_char (pos_str0);
209 String line = line_string (pos_str0);
212 for (int i = 0; i < ch_i; i++)
214 col_i = (col_i / 8 + 1) * 8;
222 Source_file::error_string (char const* pos_str0) const
224 if (!contains (pos_str0))
225 return " (" + _ ("position unknown") + ")";
227 int ch_i = get_char (pos_str0);
228 String line = line_string (pos_str0);
229 String context = line.left_string (ch_i)
231 + to_string (' ', get_column (pos_str0))
232 + line.cut_string (ch_i, INT_MAX);
238 Source_file::contains (char const* pos_str0) const
240 return (pos_str0 && (pos_str0 >= to_str0 ()) && (pos_str0 <= to_str0 () + length ()));
244 Source_file::get_line (char const* pos_str0) const
246 if (!contains (pos_str0))
249 if (!newline_locations_.size ())
253 int hi = newline_locations_.size ();
255 if (newline_locations_[lo] > pos_str0)
258 if (newline_locations_[hi-1] < pos_str0)
261 binary_search_bounds (newline_locations_,
263 Link_array<char>::default_compare,
266 if (*pos_str0 == '\n')
272 Source_file::length () const
278 Source_file::to_str0 () const
280 return contents_str0_;
284 Source_file::set_pos (char const * pos_str0)
286 if (contains (pos_str0))
287 pos_str0_ = pos_str0;
289 error (error_string (pos_str0) + "invalid pos");
293 Source_file::seek_str0 (int n)
295 char const* new_str0 = to_str0 () + n;
297 new_str0 += length ();
298 if (contains (new_str0))
299 pos_str0_ = new_str0;
301 error (error_string (new_str0) + "seek past eof");
307 Source_file::forward_str0 (int n)
309 char const* old_pos = pos_str0_;
310 char const* new_str0 = pos_str0_ + n;
311 if (contains (new_str0))
312 pos_str0_ = new_str0;
314 error (error_string (new_str0) + "forward past eof");
320 Source_file::get_string (int n)
322 String str = String ((Byte const*)forward_str0 (n), n);