lily/lily-parser-scheme.cc

   1 /*
   2   lily-parser-scheme.cc -- implement Lily_parser bindings
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 2005--2008 Han-Wen Nienhuys <hanwen@xs4all.nl>
   7 */
   8
   9 #include <unistd.h>
  10
  11 #include "lily-parser.hh"
  12
  13 #include "file-name-map.hh"
  14 #include "file-name.hh"
  15 #include "file-path.hh"
  16 #include "international.hh"
  17 #include "lily-lexer.hh"
  18 #include "ly-module.hh"
  19 #include "main.hh"
  20 #include "program-option.hh"
  21 #include "sources.hh"
  22 #include "warn.hh"
  23
  24 /* Do not append `!' suffix, since 1st argument is not modified. */
  25 LY_DEFINE (ly_set_point_and_click, "ly:set-point-and-click",
  26            1, 0, 0, (SCM what),
  27            "Deprecated.")
  28 {
  29   (void) what;
  30   warning (_f ("deprecated function called: %s", "ly:set-point-and-click"));
  31   return SCM_UNSPECIFIED;
  32 }
  33
  34 LY_DEFINE (ly_parse_file, "ly:parse-file",
  35            1, 0, 0, (SCM name),
  36            "Parse a single @code{.ly} file."
  37            "  Upon failure, throw @code{ly-file-failed} key.")
  38 {
  39   LY_ASSERT_TYPE (scm_is_string, name, 1);
  40   string file = ly_scm2string (name);
  41   char const *extensions[] = {"ly", "", 0};
  42
  43   string file_name = global_path.find (file, extensions);
  44
  45   /* By default, use base name of input file for output file name,
  46      write output to cwd; do not use root and directory parts of input
  47      file name.  */
  48   File_name out_file_name (file_name);
  49
  50   global_path.append (out_file_name.dir_);
  51
  52   out_file_name.ext_ = "";
  53   out_file_name.root_ = "";
  54   if (ly_get_option (ly_symbol2scm ("gui")) != SCM_BOOL_T
  55       && ly_get_option (ly_symbol2scm ("strip-output-dir")) == SCM_BOOL_T) {
  56     out_file_name.dir_ = "";
  57   }
  58
  59   /* When running from gui, generate output in .ly source directory.  */
  60   string output_name = output_name_global;
  61   if (!output_name.empty ())
  62     {
  63       /* Interpret --output=DIR to mean --output=DIR/BASE.  */
  64       string dir;
  65       if (is_dir (output_name))
  66         {
  67           dir = output_name;
  68           output_name = "";
  69         }
  70       else
  71         {
  72           File_name out (output_name);
  73           if (is_dir (out.dir_part ()))
  74             {
  75               dir = out.dir_part ();
  76               out_file_name = out.file_part ();
  77             }
  78         }
  79
  80       if (dir != "" && dir != "." && dir != get_working_directory ())
  81         {
  82           global_path.prepend (get_working_directory ());
  83           message (_f ("Changing working directory to: `%s'",
  84                        dir.c_str ()));
  85           chdir (dir.c_str ());
  86         }
  87       else
  88         out_file_name = File_name (output_name);
  89     }
  90
  91   string init;
  92   if (!init_name_global.empty ())
  93     init = init_name_global;
  94   else
  95     init = "init.ly";
  96
  97   string out_file = out_file_name.to_string ();
  98   if (init.length () && global_path.find (init).empty ())
  99     {
 100       warning (_f ("cannot find init file: `%s'", init));
 101       warning (_f ("(search path: `%s')",
 102                    global_path.to_string ().c_str ()));
 103       exit (2);
 104     }
 105
 106
 107   bool error = false;
 108   if ((file_name != "-") && file_name.empty ())
 109     {
 110       warning (_f ("cannot find file: `%s'", file));
 111       error = true;
 112     }
 113   else
 114     {
 115       Sources sources;
 116       sources.set_path (&global_path);
 117
 118       string mapped_fn = map_file_name (file_name);
 119       message (_f ("Processing `%s'", mapped_fn.c_str ()));
 120       progress_indication ("\n");
 121
 122       Lily_parser *parser = new Lily_parser (&sources);
 123
 124       parser->parse_file (init, file_name, out_file);
 125
 126       error = parser->error_level_;
 127
 128       parser->clear ();
 129       parser->unprotect ();
 130     }
 131
 132   /*
 133     outside the if-else to ensure cleanup fo Sources object,
 134   */
 135   if (error)
 136     /* TODO: pass renamed input file too.  */
 137     scm_throw (ly_symbol2scm ("ly-file-failed"),
 138                scm_list_1 (ly_string2scm (file_name)));
 139
 140   return SCM_UNSPECIFIED;
 141 }
 142
 143
 144 LY_DEFINE (ly_parser_lexer, "ly:parser-lexer",
 145            1, 0, 0, (SCM parser_smob),
 146            "Return the lexer for @var{parser-smob}.")
 147 {
 148   Lily_parser *parser = unsmob_lily_parser (parser_smob);
 149   return parser->lexer_->self_scm ();
 150 }
 151
 152 LY_DEFINE (ly_parser_clone, "ly:parser-clone",
 153            1, 0, 0, (SCM parser_smob),
 154            "Return a clone of @var{parser-smob}.")
 155 {
 156   LY_ASSERT_SMOB (Lily_parser, parser_smob, 1);
 157   Lily_parser *parser = unsmob_lily_parser (parser_smob);
 158   Lily_parser *clone = new Lily_parser (*parser);
 159
 160   return clone->unprotect ();
 161 }
 162
 163 LY_DEFINE (ly_parser_define_x, "ly:parser-define!",
 164            3, 0, 0, (SCM parser_smob, SCM symbol, SCM val),
 165            "Bind @var{symbol} to @var{val} in @var{parser-smob}'s module.")
 166 {
 167
 168   LY_ASSERT_SMOB (Lily_parser, parser_smob, 1);
 169   Lily_parser *parser = unsmob_lily_parser (parser_smob);
 170
 171   LY_ASSERT_TYPE (ly_is_symbol, symbol, 2);
 172
 173   parser->lexer_->set_identifier (scm_symbol_to_string (symbol), val);
 174   return SCM_UNSPECIFIED;
 175 }
 176
 177 LY_DEFINE (ly_parser_lookup, "ly:parser-lookup",
 178            2, 0, 0, (SCM parser_smob, SCM symbol),
 179            "Look up @var{symbol} in @var{parser-smob}'s module."
 180            "  Return @code{'()} if not defined.")
 181 {
 182   LY_ASSERT_SMOB (Lily_parser, parser_smob, 1);
 183
 184   Lily_parser *parser = unsmob_lily_parser (parser_smob);
 185
 186   LY_ASSERT_TYPE (ly_is_symbol, symbol, 2);
 187
 188   SCM val = parser->lexer_->lookup_identifier (ly_scm2string (scm_symbol_to_string (symbol)));
 189   if (val != SCM_UNDEFINED)
 190     return val;
 191   else
 192     return SCM_EOL;
 193 }
 194
 195 LY_DEFINE (ly_parser_parse_string, "ly:parser-parse-string",
 196            2, 0, 0, (SCM parser_smob, SCM ly_code),
 197            "Parse the string @var{ly-code} with @var{parser-smob}."
 198            "  Upon failure, throw @code{ly-file-failed} key.")
 199 {
 200   LY_ASSERT_SMOB (Lily_parser, parser_smob, 1);
 201   Lily_parser *parser = unsmob_lily_parser (parser_smob);
 202   LY_ASSERT_TYPE (scm_is_string, ly_code, 2);
 203
 204   parser->parse_string (ly_scm2string (ly_code));
 205
 206   return SCM_UNSPECIFIED;
 207 }
 208
 209 LY_DEFINE (ly_parser_set_note_names, "ly:parser-set-note-names",
 210            2, 0, 0, (SCM parser, SCM names),
 211            "Replace current note names in @var{parser}."
 212            "  @var{names} is an alist of symbols.  This only has effect"
 213            " if the current mode is notes.")
 214 {
 215   LY_ASSERT_SMOB (Lily_parser, parser, 1);
 216   Lily_parser *p = unsmob_lily_parser (parser);
 217
 218   if (p->lexer_->is_note_state ())
 219     {
 220       p->lexer_->pop_state ();
 221       p->lexer_->push_note_state (alist_to_hashq (names));
 222     }
 223
 224   return SCM_UNSPECIFIED;
 225 }
 226
 227 LY_DEFINE (ly_parser_output_name, "ly:parser-output-name",
 228            1, 0, 0, (SCM parser),
 229            "Return the base name of the output file.")
 230 {
 231   LY_ASSERT_SMOB (Lily_parser, parser, 1);
 232   Lily_parser *p = unsmob_lily_parser (parser);
 233
 234   return ly_string2scm (p->output_basename_);
 235 }
 236
 237 LY_DEFINE (ly_parser_error, "ly:parser-error",
 238            2, 1, 0, (SCM parser, SCM msg, SCM input),
 239            "Display an error message and make the parser fail.")
 240 {
 241   LY_ASSERT_SMOB (Lily_parser, parser, 1);
 242   Lily_parser *p = unsmob_lily_parser (parser);
 243
 244   LY_ASSERT_TYPE (scm_is_string, msg, 2);
 245   string s = ly_scm2string (msg);
 246
 247   Input *i = unsmob_input (input);
 248   if (i)
 249     p->parser_error (*i, s);
 250   else
 251     p->parser_error (s);
 252
 253   return parser;
 254 }
 255
 256 LY_DEFINE (ly_parser_clear_error, "ly:parser-clear-error",
 257            1, 0, 0, (SCM parser),
 258            "Clear the error flag for the parser.")
 259 {
 260   LY_ASSERT_SMOB (Lily_parser, parser, 1);
 261   Lily_parser *p = unsmob_lily_parser (parser);
 262
 263
 264   p->error_level_ = 0;
 265   p->lexer_->error_level_ = 0;
 266
 267   return SCM_UNSPECIFIED;
 268 }
 269
 270 LY_DEFINE (ly_parser_has_error_p, "ly:parser-has-error?",
 271            1, 0, 0, (SCM parser),
 272            "Does @var{parser} have an error flag?")
 273 {
 274   LY_ASSERT_SMOB (Lily_parser, parser, 1);
 275   Lily_parser *p = unsmob_lily_parser (parser);
 276
 277   return scm_from_bool (p->error_level_ || p->lexer_->error_level_);
 278 }