2 source-file.cc -- implement Source_file
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2006 Jan Nieuwenhuizen <janneke@gnu.org>
7 Han-Wen Nienhuys <hanwen@xs4all.nl>
10 #include "source-file.hh"
15 #include <utf8/wchar.h> /* mbrtowc */
17 #include <cwchar> /* mbrtowc */
26 #define istringstream(x) istrstream (x, length ())
30 #include "file-name-map.hh"
31 #include "international.hh"
35 Source_file::load_stdin ()
39 while ((c = fgetc (stdin)) != EOF)
40 characters_.push_back (c);
42 characters_.push_back (0);
46 gulp_file (string filename, int desired_size)
48 /* "b" must ensure to open literally, avoiding text (CR/LF)
50 FILE *f = fopen (filename.c_str (), "rb");
53 warning (_f ("can't open file: `%s'", filename.c_str ()));
59 fseek (f, 0, SEEK_END);
60 int real_size = ftell (f);
61 int read_count = real_size;
64 read_count = min (read_count, desired_size);
68 char *str = new char[read_count + 1];
71 int bytes_read = fread (str, sizeof (char), read_count, f);
72 if (bytes_read != read_count)
73 warning (_f ("expected to read %d characters, got %d", bytes_read,
76 int filesize = bytes_read;
79 cxx_arr.resize (filesize);
81 copy (str, str + filesize, cxx_arr.begin ());
97 Source_file::Source_file (string filename, string data)
103 characters_.resize (data.length ());
105 copy (data.begin (), data.end (), characters_.begin ());
109 for (vsize i = 0; i < characters_.size (); i++)
110 if (characters_[i] == '\n')
111 newline_locations_.push_back (&characters_[0] + i);
114 Source_file::Source_file (string filename_string)
118 name_ = filename_string;
120 if (filename_string == "-")
124 characters_ = gulp_file (filename_string, -1);
125 characters_.push_back (0);
130 for (vsize i = 0; i < characters_.size (); i++)
131 if (characters_[i] == '\n')
132 newline_locations_.push_back (&characters_[0] + i);
136 Source_file::init_port ()
138 SCM str = scm_makfrom0str (c_str ());
139 str_port_ = scm_mkstrport (SCM_INUM0, str, SCM_OPN | SCM_RDNG, __FUNCTION__);
140 scm_set_port_filename_x (str_port_, scm_makfrom0str (name_.c_str ()));
145 Source_file::get_istream ()
149 if (length ()) // can-t this be done without such a hack?
150 istream_ = new istringstream (c_str ());
153 istream_ = new istringstream ("");
154 istream_->setstate (ios::eofbit);
155 // istream_->set (ios::eofbit);
162 Source_file::file_line_column_string (char const *context_str0) const
165 return " (" + _ ("position unknown") + ")";
169 get_counts (context_str0, &l, &ch, &col);
171 return name_string () + ":" + to_string (l)
172 + ":" + to_string (col);
177 Source_file::quote_input (char const *pos_str0) const
179 if (!contains (pos_str0))
180 return " (" + _ ("position unknown") + ")";
183 get_counts (pos_str0, &l, &ch, &col);
184 string line = line_string (pos_str0);
185 string context = line.substr (0, ch)
187 + to_string (' ', col)
188 + line.substr (ch, line.length()-ch);
193 Source_file::name_string () const
195 return map_file_name (name_);
198 Source_file::~Source_file ()
205 Source_file::line_slice (char const *pos_str0) const
207 if (!contains (pos_str0))
210 char const *data_str0 = c_str ();
211 char const *eof_C_ = data_str0 + length ();
213 if (pos_str0 == eof_C_)
215 char const *begin_str0 = pos_str0;
216 while (begin_str0 > data_str0)
217 if (*--begin_str0 == '\n')
223 char const *end_str0 = pos_str0;
224 while (end_str0 < eof_C_)
225 if (*end_str0++ == '\n')
231 return Slice (begin_str0 - data_str0, end_str0 - data_str0);
235 Source_file::line_string (char const *pos_str0) const
237 if (!contains (pos_str0))
240 Slice line = line_slice (pos_str0);
241 char const *data_str0 = c_str ();
242 return string (data_str0 + line[LEFT], line.length ());
246 Source_file::get_counts (char const *pos_str0,
255 if (!contains (pos_str0))
258 *line_number = get_line (pos_str0);
260 Slice line = line_slice (pos_str0);
261 char const *data = c_str ();
262 char const *line_start = (char const *)data + line[LEFT];
264 ssize left = (char const *) pos_str0 - line_start;
265 string line_begin (line_start, left);
266 char const *line_chars = line_begin.c_str ();
273 /* Initialize the state. */
274 memset (&state, '\0', sizeof (state));
278 wchar_t multibyte[2];
281 FIXME, this is apparently locale dependent.
284 size_t thislen = mbrtowc (multibyte, line_chars, left, &state);
287 #endif /* !HAVE_MBRTOWC */
289 /* Stop converting at invalid character;
290 this can mean we have read just the first part
291 of a valid character. */
292 if (thislen == (size_t) -1)
295 /* We want to handle embedded NUL bytes
296 but the return value is 0. Correct this. */
300 if (thislen == 1 && line_chars[0] == '\t')
301 (*column) = (*column / 8 + 1) * 8;
306 /* Advance past this character. */
307 line_chars += thislen;
313 Source_file::contains (char const *pos_str0) const
315 return (pos_str0 && (pos_str0 >= c_str ()) && (pos_str0 <= c_str () + length ()));
319 Source_file::get_line (char const *pos_str0) const
321 if (!contains (pos_str0))
324 if (!newline_locations_.size ())
328 vsize hi = newline_locations_.size ();
330 if (newline_locations_[lo] > pos_str0)
333 if (newline_locations_[hi - 1] < pos_str0)
336 binary_search_bounds (newline_locations_,
337 (char const*&)pos_str0,
341 if (*pos_str0 == '\n')
343 return lo + 2 + line_offset_;
347 Source_file::set_line (char const *pos_str0, int line)
349 int current_line = get_line (pos_str0);
350 line_offset_ += line - current_line;
352 assert (line == get_line (pos_str0));
356 Source_file::length () const
358 return characters_.size ();
362 Source_file::c_str () const
364 return &characters_[0];
368 Source_file::get_port () const
373 /****************************************************************/
375 #include "ly-smobs.icc"
377 IMPLEMENT_SMOBS(Source_file);
378 IMPLEMENT_DEFAULT_EQUAL_P(Source_file);
379 IMPLEMENT_TYPE_P(Source_file, "ly:source-file?");
382 Source_file::mark_smob (SCM smob)
384 Source_file *sc = (Source_file *) SCM_CELL_WORD_1 (smob);
386 return sc->str_port_;
391 Source_file::print_smob (SCM smob, SCM port, scm_print_state *)
393 Source_file *sc = (Source_file *) SCM_CELL_WORD_1 (smob);
395 scm_puts ("#<Source_file ", port);
396 scm_puts (sc->name_.c_str (), port);
398 /* Do not print properties, that is too much hassle. */
399 scm_puts (" >", port);