2 source-file.cc -- implement Source_file
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2000 Jan Nieuwenhuizen <janneke@gnu.org>
7 & Han-Wen Nienhuys <hanwen@cs.uu.nl>
15 #include <strstream.h>
16 #define istringstream(x) istrstream(x, length ())
20 #include "flower-proto.hh"
22 #include "source-file.hh"
26 Source_file::load_stdin ()
31 Array<char> chs; // ugh.
32 while ((c = fgetc (stdin)) != EOF)
35 length_ = chs.size ();
36 contents_str0_ = chs.remove_array ();
42 gulp_file (String fn, int* len)
45 let's hope that "b" opens anything binary, and does not apply
48 FILE * f = fopen (fn.to_str0 (), "rb");
52 warning (_f ("can't open file: `%s'", fn.to_str0 ()));
56 int ret = fseek (f, 0, SEEK_END);
60 char * str = new char[*len+1];
62 ret = fread (str, sizeof (char), *len, f);
65 warning (_f ("Huh? Got %d, expected %d characters", ret, *len));
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 ();
88 Source_file::Source_file (String filename_string)
90 name_string_ = filename_string;
94 if (filename_string == "-")
97 contents_str0_ = gulp_file (filename_string, &length_);
99 pos_str0_ = to_str0 ();
105 Source_file::init_port ()
107 SCM str =scm_makfrom0str (contents_str0_);
109 str_port_ = scm_mkstrport (SCM_INUM0, str, SCM_OPN | SCM_RDNG,
111 scm_set_port_filename_x (str_port_,
112 scm_makfrom0str (name_string_.get_str0()));
116 Source_file::tell () const
118 return pos_str0_ - contents_str0_;
122 Source_file::get_istream ()
125 if (!name_string_.length ())
131 if (length ()) // can-t this be done without such a hack?
132 istream_ = new std::istringstream (to_str0 ());
135 istream_ = new std::istringstream ("");
136 istream_->setstate (std::ios::eofbit);
137 // istream_->set (ios::eofbit);
144 Source_file::file_line_column_string (char const *context_str0) const
147 return " (" + _ ("position unknown") + ")";
149 return name_string () + ":" + to_string (get_line (context_str0))
150 + ":" + to_string (get_char (context_str0));
154 Source_file::name_string () const
159 Source_file::~Source_file ()
163 delete contents_str0_;
167 Source_file::line_slice (char const* pos_str0) const
169 if (!in_b (pos_str0))
172 char const* data_str0 = to_str0 ();
173 char const * eof_C_ = data_str0 + length ();
175 if (pos_str0 == eof_C_)
177 char const* begin_str0 = pos_str0;
178 while (begin_str0 > data_str0)
179 if (*--begin_str0 == '\n')
185 char const* end_str0 = pos_str0;
186 while (end_str0 < eof_C_)
187 if (*end_str0++ == '\n')
193 return Slice (begin_str0 - data_str0, end_str0 - data_str0);
197 Source_file::line_string (char const* pos_str0) const
199 if (!in_b (pos_str0))
202 Slice line = line_slice (pos_str0);
203 char const* data_str0 = to_str0 ();
204 return String ((Byte const*)data_str0 + line[LEFT], line.length ());
208 Source_file::get_char (char const* pos_str0) const
210 if (!in_b (pos_str0))
213 char const* data_str0 = to_str0 ();
214 return pos_str0 - (line_slice (pos_str0)[SMALLER] + data_str0);
218 Source_file::get_column (char const* pos_str0) const
220 if (!in_b (pos_str0))
223 int ch_i = get_char (pos_str0);
224 String line = line_string (pos_str0);
227 for (int i = 0; i < ch_i; i++)
229 col_i = (col_i / 8 + 1) * 8;
237 Source_file::error_string (char const* pos_str0) const
239 if (!in_b (pos_str0))
240 return " (" + _ ("position unknown") + ")";
242 int ch_i = get_char (pos_str0);
243 String line = line_string (pos_str0);
244 String context = line.left_string (ch_i)
246 + to_string (' ', get_column (pos_str0))
247 + line.cut_string (ch_i, INT_MAX);
253 Source_file::in_b (char const* pos_str0) const
255 return (pos_str0 && (pos_str0 >= to_str0 ()) && (pos_str0 <= to_str0 () + length ()));
259 Source_file::get_line (char const* pos_str0) const
261 if (!in_b (pos_str0))
265 char const* scan_str0 = to_str0 ();
269 while (scan_str0 < pos_str0)
270 if (*scan_str0++ == '\n')
276 Source_file::length () const
282 Source_file::to_str0 () const
284 return contents_str0_;
288 Source_file::set_pos (char const * pos_str0)
291 pos_str0_ = pos_str0;
293 error (error_string (pos_str0) + "invalid pos");
297 Source_file::seek_str0 (int n)
299 char const* new_str0 = to_str0 () + n;
301 new_str0 += length ();
303 pos_str0_ = new_str0;
305 error (error_string (new_str0) + "seek past eof");
311 Source_file::forward_str0 (int n)
313 char const* old_pos = pos_str0_;
314 char const* new_str0 = pos_str0_ + n;
316 pos_str0_ = new_str0;
318 error (error_string (new_str0) + "forward past eof");
324 Source_file::get_string (int n)
326 String str = String ((Byte const*)forward_str0 (n), n);