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);
82 copy (str, str + filesize, cxx_arr.begin ());
98 Source_file::Source_file (string filename, string data)
104 characters_.resize (data.length ());
106 copy (data.begin (), data.end (), characters_.begin ());
110 for (vsize i = 0; i < characters_.size (); i++)
111 if (characters_[i] == '\n')
112 newline_locations_.push_back (&characters_[0] + i);
115 Source_file::Source_file (string filename_string)
119 name_ = filename_string;
121 if (filename_string == "-")
125 characters_ = gulp_file (filename_string, -1);
126 characters_.push_back (0);
131 for (vsize i = 0; i < characters_.size (); i++)
132 if (characters_[i] == '\n')
133 newline_locations_.push_back (&characters_[0] + i);
137 Source_file::init_port ()
139 SCM str = scm_makfrom0str (c_str ());
140 str_port_ = scm_mkstrport (SCM_INUM0, str, SCM_OPN | SCM_RDNG, __FUNCTION__);
141 scm_set_port_filename_x (str_port_, scm_makfrom0str (name_.c_str ()));
146 Source_file::get_istream ()
150 if (length ()) // can-t this be done without such a hack?
151 istream_ = new istringstream (c_str ());
154 istream_ = new istringstream ("");
155 istream_->setstate (ios::eofbit);
156 // istream_->set (ios::eofbit);
163 Source_file::file_line_column_string (char const *context_str0) const
166 return " (" + _ ("position unknown") + ")";
170 get_counts (context_str0, &l, &ch, &col);
172 return name_string () + ":" + to_string (l)
173 + ":" + to_string (col);
178 Source_file::quote_input (char const *pos_str0) const
180 if (!contains (pos_str0))
181 return " (" + _ ("position unknown") + ")";
184 get_counts (pos_str0, &l, &ch, &col);
185 string line = line_string (pos_str0);
186 string context = line.substr (0, ch)
188 + to_string (' ', col)
189 + line.substr (ch, line.length()-ch);
194 Source_file::name_string () const
196 return map_file_name (name_);
199 Source_file::~Source_file ()
206 Source_file::line_slice (char const *pos_str0) const
208 if (!contains (pos_str0))
211 char const *data_str0 = c_str ();
212 char const *eof_C_ = data_str0 + length ();
214 if (pos_str0 == eof_C_)
216 char const *begin_str0 = pos_str0;
217 while (begin_str0 > data_str0)
218 if (*--begin_str0 == '\n')
224 char const *end_str0 = pos_str0;
225 while (end_str0 < eof_C_)
226 if (*end_str0++ == '\n')
232 return Slice (begin_str0 - data_str0, end_str0 - data_str0);
236 Source_file::line_string (char const *pos_str0) const
238 if (!contains (pos_str0))
241 Slice line = line_slice (pos_str0);
242 char const *data_str0 = c_str ();
243 return string (data_str0 + line[LEFT], line.length ());
247 Source_file::get_counts (char const *pos_str0,
256 if (!contains (pos_str0))
259 *line_number = get_line (pos_str0);
261 Slice line = line_slice (pos_str0);
262 char const *data = c_str ();
263 char const *line_start = (char const *)data + line[LEFT];
265 ssize left = (char const *) pos_str0 - line_start;
266 string line_begin (line_start, left);
267 char const *line_chars = line_begin.c_str ();
274 /* Initialize the state. */
275 memset (&state, '\0', sizeof (state));
279 wchar_t multibyte[2];
282 FIXME, this is apparently locale dependent.
285 size_t thislen = mbrtowc (multibyte, line_chars, left, &state);
288 #endif /* !HAVE_MBRTOWC */
290 /* Stop converting at invalid character;
291 this can mean we have read just the first part
292 of a valid character. */
293 if (thislen == (size_t) -1)
296 /* We want to handle embedded NUL bytes
297 but the return value is 0. Correct this. */
301 if (thislen == 1 && line_chars[0] == '\t')
302 (*column) = (*column / 8 + 1) * 8;
307 /* Advance past this character. */
308 line_chars += thislen;
314 Source_file::contains (char const *pos_str0) const
316 return (pos_str0 && (pos_str0 >= c_str ()) && (pos_str0 <= c_str () + length ()));
320 Source_file::get_line (char const *pos_str0) const
322 if (!contains (pos_str0))
325 if (!newline_locations_.size ())
329 vsize hi = newline_locations_.size ();
331 if (newline_locations_[lo] > pos_str0)
334 if (newline_locations_[hi - 1] < pos_str0)
337 binary_search_bounds (newline_locations_,
338 (char const*&)pos_str0,
342 if (*pos_str0 == '\n')
344 return lo + 2 + line_offset_;
348 Source_file::set_line (char const *pos_str0, int line)
350 int current_line = get_line (pos_str0);
351 line_offset_ += line - current_line;
353 assert (line == get_line (pos_str0));
357 Source_file::length () const
359 return characters_.size ();
363 Source_file::c_str () const
365 return &characters_[0];
369 Source_file::get_port () const
374 /****************************************************************/
376 #include "ly-smobs.icc"
378 IMPLEMENT_SMOBS(Source_file);
379 IMPLEMENT_DEFAULT_EQUAL_P(Source_file);
380 IMPLEMENT_TYPE_P(Source_file, "ly:source-file?");
383 Source_file::mark_smob (SCM smob)
385 Source_file *sc = (Source_file *) SCM_CELL_WORD_1 (smob);
387 return sc->str_port_;
392 Source_file::print_smob (SCM smob, SCM port, scm_print_state *)
394 Source_file *sc = (Source_file *) SCM_CELL_WORD_1 (smob);
396 scm_puts ("#<Source_file ", port);
397 scm_puts (sc->name_.c_str (), port);
399 /* Do not print properties, that is too much hassle. */
400 scm_puts (" >", port);