2 source-file.cc -- implement Source_file
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2007 Jan Nieuwenhuizen <janneke@gnu.org>
7 Han-Wen Nienhuys <hanwen@xs4all.nl>
11 #define _GLIBCXX_HAVE_MBSTATE_T
13 #endif /* GCC_MAJOR < 4 */
15 #include "source-file.hh"
20 #include <utf8/wchar.h> /* mbrtowc */
21 #else /* !HAVE_UTF8_WCHAR_H */
22 #include <cwchar> /* mbrtowc */
23 #endif /* HAVE_UTF8_WCHAR_H */
31 #define istringstream(x) istrstream (x, length ())
35 #include "file-name-map.hh"
36 #include "international.hh"
40 Source_file::load_stdin ()
44 while ((c = fgetc (stdin)) != EOF)
45 characters_.push_back (c);
49 return contents of FILENAME. *Not 0-terminated!*
52 gulp_file (string filename, int desired_size)
54 /* "b" must ensure to open literally, avoiding text (CR/LF)
56 FILE *f = fopen (filename.c_str (), "rb");
59 warning (_f ("cannot open file: `%s'", filename.c_str ()));
65 fseek (f, 0, SEEK_END);
66 int real_size = ftell (f);
67 int read_count = real_size;
70 read_count = min (read_count, desired_size);
74 char *str = new char[read_count + 1];
77 int bytes_read = fread (str, sizeof (char), read_count, f);
78 if (bytes_read != read_count)
79 warning (_f ("expected to read %d characters, got %d", bytes_read,
82 int filesize = bytes_read;
85 cxx_arr.resize (filesize);
87 copy (str, str + filesize, cxx_arr.begin ());
103 Source_file::Source_file (string filename, string data)
109 characters_.resize (data.length ());
110 copy (data.begin (), data.end (), characters_.begin ());
112 characters_.push_back (0);
116 for (vsize i = 0; i < characters_.size (); i++)
117 if (characters_[i] == '\n')
118 newline_locations_.push_back (&characters_[0] + i);
121 Source_file::Source_file (string filename_string)
125 name_ = filename_string;
127 if (filename_string == "-")
131 characters_ = gulp_file (filename_string, -1);
134 characters_.push_back (0);
138 for (vsize i = 0; i < characters_.size (); i++)
139 if (characters_[i] == '\n')
140 newline_locations_.push_back (&characters_[0] + i);
144 Source_file::init_port ()
146 SCM str = scm_from_locale_string (c_str ());
147 str_port_ = scm_mkstrport (SCM_INUM0, str, SCM_OPN | SCM_RDNG, __FUNCTION__);
148 scm_set_port_filename_x (str_port_, ly_string2scm (name_));
153 Source_file::get_istream ()
157 if (length ()) // can-t this be done without such a hack?
158 istream_ = new istringstream (c_str ());
161 istream_ = new istringstream ("");
162 istream_->setstate (ios::eofbit);
163 // istream_->set (ios::eofbit);
170 Source_file::file_line_column_string (char const *context_str0) const
173 return " (" + _ ("position unknown") + ")";
177 get_counts (context_str0, &l, &ch, &col);
179 return name_string () + ":" + to_string (l)
180 + ":" + to_string (col);
185 Source_file::quote_input (char const *pos_str0) const
187 if (!contains (pos_str0))
188 return " (" + _ ("position unknown") + ")";
191 get_counts (pos_str0, &l, &ch, &col);
192 string line = line_string (pos_str0);
193 string context = line.substr (0, ch)
195 + to_string (' ', col)
196 + line.substr (ch, line.length ()-ch);
201 Source_file::name_string () const
203 return map_file_name (name_);
206 Source_file::~Source_file ()
212 Source_file::line_slice (char const *pos_str0) const
214 if (!contains (pos_str0))
217 char const *data_str0 = c_str ();
218 char const *eof_C_ = data_str0 + length ();
220 if (pos_str0 == eof_C_)
222 char const *begin_str0 = pos_str0;
223 while (begin_str0 > data_str0)
224 if (*--begin_str0 == '\n')
230 char const *end_str0 = pos_str0;
231 while (end_str0 < eof_C_)
232 if (*end_str0++ == '\n')
238 return Slice (begin_str0 - data_str0, end_str0 - data_str0);
242 Source_file::line_string (char const *pos_str0) const
244 if (!contains (pos_str0))
247 Slice line = line_slice (pos_str0);
248 char const *data_str0 = c_str ();
249 return string (data_str0 + line[LEFT], line.length ());
253 Source_file::get_counts (char const *pos_str0,
262 if (!contains (pos_str0))
265 *line_number = get_line (pos_str0);
267 Slice line = line_slice (pos_str0);
268 char const *data = c_str ();
269 char const *line_start = (char const *)data + line[LEFT];
271 ssize left = (char const *) pos_str0 - line_start;
272 string line_begin (line_start, left);
273 char const *line_chars = line_begin.c_str ();
280 /* Initialize the state. */
281 memset (&state, '\0', sizeof (state));
286 FIXME, this is apparently locale dependent.
289 wchar_t multibyte[2];
290 size_t thislen = mbrtowc (multibyte, line_chars, left, &state);
293 #endif /* !HAVE_MBRTOWC */
295 /* Stop converting at invalid character;
296 this can mean we have read just the first part
297 of a valid character. */
298 if (thislen == (size_t) -1)
301 /* We want to handle embedded NUL bytes
302 but the return value is 0. Correct this. */
306 if (thislen == 1 && line_chars[0] == '\t')
307 (*column) = (*column / 8 + 1) * 8;
312 /* Advance past this character. */
313 line_chars += thislen;
319 Source_file::contains (char const *pos_str0) const
321 return (pos_str0 && (pos_str0 >= c_str ()) && (pos_str0 <= c_str () + length ()));
325 Source_file::get_line (char const *pos_str0) const
327 if (!contains (pos_str0))
330 if (!newline_locations_.size ())
333 /* this will find the '\n' character at the end of our line */
334 vsize lo = lower_bound (newline_locations_,
336 less<char const*> ());
338 /* the return value will be indexed from 1 */
339 return lo + 1 + line_offset_;
343 Source_file::set_line (char const *pos_str0, int line)
345 int current_line = get_line (pos_str0);
346 line_offset_ += line - current_line;
348 assert (line == get_line (pos_str0));
352 Source_file::length () const
354 return characters_.size ();
358 Source_file::c_str () const
360 return &characters_[0];
364 Source_file::get_port () const
369 /****************************************************************/
371 #include "ly-smobs.icc"
373 IMPLEMENT_SMOBS (Source_file);
374 IMPLEMENT_DEFAULT_EQUAL_P (Source_file);
375 IMPLEMENT_TYPE_P (Source_file, "ly:source-file?");
378 Source_file::mark_smob (SCM smob)
380 Source_file *sc = (Source_file *) SCM_CELL_WORD_1 (smob);
382 return sc->str_port_;
387 Source_file::print_smob (SCM smob, SCM port, scm_print_state *)
389 Source_file *sc = (Source_file *) SCM_CELL_WORD_1 (smob);
391 scm_puts ("#<Source_file ", port);
392 scm_puts (sc->name_.c_str (), port);
394 /* Do not print properties, that is too much hassle. */
395 scm_puts (" >", port);