2 source-file.cc -- implement Source_file
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2005 Jan Nieuwenhuizen <janneke@gnu.org>
7 Han-Wen Nienhuys <hanwen@cs.uu.nl>
10 #include "source-file.hh"
15 #include <utf8/wchar.h> /* mbrtowc */
17 #include <wchar.h> /* mbrtowc */
26 #define istringstream(x) istrstream (x, length ())
30 #include "file-name-map.hh"
33 Source_file::load_stdin ()
38 Array<char> chs; // ugh.
39 while ((c = fgetc (stdin)) != EOF)
43 length_ = chs.size ();
44 contents_str0_ = chs.remove_array ();
48 gulp_file (String filename, int *filesize)
50 /* "b" must ensure to open literally, avoiding text (CR/LF)
52 FILE *f = fopen (filename.to_str0 (), "rb");
55 warning (_f ("can't open file: `%s'", filename.to_str0 ()));
59 fseek (f, 0, SEEK_END);
60 *filesize = ftell (f);
63 char *str = new char[*filesize + 1];
66 int bytes_read = fread (str, sizeof (char), *filesize, f);
67 if (bytes_read != *filesize)
68 warning (_f ("expected to read %d characters, got %d", bytes_read,
75 Source_file::Source_file (String filename, String data)
79 contents_str0_ = data.get_copy_str0 ();
80 length_ = data.length ();
81 pos_str0_ = to_str0 ();
84 for (int i = 0; i < length_; i++)
85 if (contents_str0_[i] == '\n')
86 newline_locations_.push (contents_str0_ + i);
89 Source_file::Source_file (String filename_string)
91 name_ = filename_string;
95 if (filename_string == "-")
98 contents_str0_ = gulp_file (filename_string, &length_);
100 pos_str0_ = to_str0 ();
104 for (int i = 0; i < length_; i++)
105 if (contents_str0_[i] == '\n')
106 newline_locations_.push (contents_str0_ + i);
110 Source_file::init_port ()
112 SCM str = scm_makfrom0str (contents_str0_);
113 str_port_ = scm_mkstrport (SCM_INUM0, str, SCM_OPN | SCM_RDNG, __FUNCTION__);
114 scm_set_port_filename_x (str_port_, scm_makfrom0str (name_.get_str0 ()));
118 Source_file::tell () const
120 return pos_str0_ - contents_str0_;
124 Source_file::get_istream ()
128 if (length ()) // can-t this be done without such a hack?
129 istream_ = new std::istringstream (to_str0 ());
132 istream_ = new std::istringstream ("");
133 istream_->setstate (std::ios::eofbit);
134 // istream_->set (ios::eofbit);
141 Source_file::file_line_column_string (char const *context_str0) const
144 return " (" + _ ("position unknown") + ")";
148 get_counts (context_str0, &l, &ch, &col);
150 return name_string () + ":" + to_string (l)
151 + ":" + to_string (col);
156 Source_file::quote_input (char const *pos_str0) const
158 if (!contains (pos_str0))
159 return " (" + _ ("position unknown") + ")";
162 get_counts (pos_str0, &l, &ch, &col);
163 String line = line_string (pos_str0);
164 String context = line.left_string (ch)
166 + to_string (' ', col)
167 + line.cut_string (ch, INT_MAX);
172 Source_file::name_string () const
174 return map_file_name (name_);
177 Source_file::~Source_file ()
181 delete[] contents_str0_;
185 Source_file::line_slice (char const *pos_str0) const
187 if (!contains (pos_str0))
190 char const *data_str0 = to_str0 ();
191 char const *eof_C_ = data_str0 + length ();
193 if (pos_str0 == eof_C_)
195 char const *begin_str0 = pos_str0;
196 while (begin_str0 > data_str0)
197 if (*--begin_str0 == '\n')
203 char const *end_str0 = pos_str0;
204 while (end_str0 < eof_C_)
205 if (*end_str0++ == '\n')
211 return Slice (begin_str0 - data_str0, end_str0 - data_str0);
215 Source_file::line_string (char const *pos_str0) const
217 if (!contains (pos_str0))
220 Slice line = line_slice (pos_str0);
221 char const *data_str0 = to_str0 ();
222 return String ((Byte const *)data_str0 + line[LEFT], line.length ());
226 Source_file::get_counts (char const *pos_str0,
231 if (!contains (pos_str0))
234 *line_number = get_line (pos_str0);
236 Slice line = line_slice (pos_str0);
237 char const *data = to_str0 ();
238 Byte const *line_start = (Byte const *)data + line[LEFT];
240 int left = (Byte const *) pos_str0 - line_start;
241 String line_begin (line_start, left);
242 char const *line_chars = line_begin.to_str0 ();
249 /* Initialize the state. */
250 memset (&state, '\0', sizeof (state));
254 wchar_t multibyte[2];
257 FIXME, this is apparently locale dependent.
259 size_t thislen = mbrtowc (multibyte, line_chars, left, &state);
261 /* Stop converting at invalid character;
262 this can mean we have read just the first part
263 of a valid character. */
264 if (thislen == (size_t) -1)
267 /* We want to handle embedded NUL bytes
268 but the return value is 0. Correct this. */
272 if (thislen == 1 && line_chars[0] == '\t')
273 (*column) = (*column / 8 + 1) * 8;
278 /* Advance past this character. */
279 line_chars += thislen;
285 Source_file::contains (char const *pos_str0) const
287 return (pos_str0 && (pos_str0 >= to_str0 ()) && (pos_str0 <= to_str0 () + length ()));
291 Source_file::get_line (char const *pos_str0) const
293 if (!contains (pos_str0))
296 if (!newline_locations_.size ())
300 int hi = newline_locations_.size ();
302 if (newline_locations_[lo] > pos_str0)
305 if (newline_locations_[hi - 1] < pos_str0)
308 binary_search_bounds (newline_locations_,
310 Link_array<char>::default_compare,
313 if (*pos_str0 == '\n')
319 Source_file::length () const
325 Source_file::to_str0 () const
327 return contents_str0_;
331 Source_file::set_pos (char const *pos_str0)
333 if (contains (pos_str0))
334 pos_str0_ = pos_str0;
336 error (quote_input (pos_str0) + "invalid pos");
340 Source_file::seek_str0 (int n)
342 char const *new_str0 = to_str0 () + n;
344 new_str0 += length ();
345 if (contains (new_str0))
346 pos_str0_ = new_str0;
348 error (quote_input (new_str0) + "seek past eof");
354 Source_file::forward_str0 (int n)
356 char const *old_pos = pos_str0_;
357 char const *new_str0 = pos_str0_ + n;
358 if (contains (new_str0))
359 pos_str0_ = new_str0;
361 error (quote_input (new_str0) + "forward past eof");
367 Source_file::get_string (int n)
369 String str = String ((Byte const *)forward_str0 (n), n);
374 Source_file::get_port () const