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--2009 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 LY_DEFINE (ly_parse_file, "ly:parse-file",
  25            1, 0, 0, (SCM name),
  26            "Parse a single @code{.ly} file."
  27            "  Upon failure, throw @code{ly-file-failed} key.")
  28 {
  29   LY_ASSERT_TYPE (scm_is_string, name, 1);
  30   string file = ly_scm2string (name);
  31   char const *extensions[] = {"ly", "", 0};
  32
  33   string file_name = global_path.find (file, extensions);
  34
  35   /* By default, use base name of input file for output file name,
  36      write output to cwd; do not use root and directory parts of input
  37      file name.  */
  38   File_name out_file_name (file_name);
  39
  40   out_file_name.ext_ = "";
  41   out_file_name.root_ = "";
  42   if (ly_get_option (ly_symbol2scm ("gui")) != SCM_BOOL_T
  43       && ly_get_option (ly_symbol2scm ("strip-output-dir")) == SCM_BOOL_T) {
  44     out_file_name.dir_ = "";
  45   }
  46
  47   /* When running from gui, generate output in .ly source directory.  */
  48   string output_name = output_name_global;
  49   if (!output_name.empty ())
  50     {
  51       /* Interpret --output=DIR to mean --output=DIR/BASE.  */
  52       string dir;
  53       if (is_dir (output_name))
  54         {
  55           dir = output_name;
  56           output_name = "";
  57         }
  58       else
  59         {
  60           File_name out (output_name);
  61           if (is_dir (out.dir_part ()))
  62             {
  63               dir = out.dir_part ();
  64               out_file_name = out.file_part ();
  65             }
  66         }
  67
  68       if (dir != "" && dir != "." && dir != get_working_directory ())
  69         {
  70           global_path.prepend (get_working_directory ());
  71           message (_f ("Changing working directory to: `%s'",
  72                        dir.c_str ()));
  73           chdir (dir.c_str ());
  74         }
  75       else
  76         out_file_name = File_name (output_name);
  77     }
  78
  79   string init;
  80   if (!init_name_global.empty ())
  81     init = init_name_global;
  82   else
  83     init = "init.ly";
  84
  85   string out_file = out_file_name.to_string ();
  86   if (init.length () && global_path.find (init).empty ())
  87     {
  88       warning (_f ("cannot find init file: `%s'", init));
  89       warning (_f ("(search path: `%s')",
  90                    global_path.to_string ().c_str ()));
  91       exit (2);
  92     }
  93
  94
  95   bool error = false;
  96   if ((file_name != "-") && file_name.empty ())
  97     {
  98       warning (_f ("cannot find file: `%s'", file));
  99       error = true;
 100     }
 101   else
 102     {
 103       Sources sources;
 104       sources.set_path (&global_path);
 105
 106       string mapped_fn = map_file_name (file_name);
 107       message (_f ("Processing `%s'", mapped_fn.c_str ()));
 108       progress_indication ("\n");
 109
 110       Lily_parser *parser = new Lily_parser (&sources);
 111
 112       parser->parse_file (init, file_name, out_file);
 113
 114       error = parser->error_level_;
 115
 116       parser->clear ();
 117       parser->unprotect ();
 118     }
 119
 120   /*
 121     outside the if-else to ensure cleanup fo Sources object,
 122   */
 123   if (error)
 124     /* TODO: pass renamed input file too.  */
 125     scm_throw (ly_symbol2scm ("ly-file-failed"),
 126                scm_list_1 (ly_string2scm (file_name)));
 127
 128   return SCM_UNSPECIFIED;
 129 }
 130
 131
 132 LY_DEFINE (ly_parser_lexer, "ly:parser-lexer",
 133            1, 0, 0, (SCM parser_smob),
 134            "Return the lexer for @var{parser-smob}.")
 135 {
 136   Lily_parser *parser = unsmob_lily_parser (parser_smob);
 137   return parser->lexer_->self_scm ();
 138 }
 139
 140 LY_DEFINE (ly_parser_clone, "ly:parser-clone",
 141            1, 0, 0, (SCM parser_smob),
 142            "Return a clone of @var{parser-smob}.")
 143 {
 144   LY_ASSERT_SMOB (Lily_parser, parser_smob, 1);
 145   Lily_parser *parser = unsmob_lily_parser (parser_smob);
 146   Lily_parser *clone = new Lily_parser (*parser);
 147
 148   return clone->unprotect ();
 149 }
 150
 151 LY_DEFINE (ly_parser_define_x, "ly:parser-define!",
 152            3, 0, 0, (SCM parser_smob, SCM symbol, SCM val),
 153            "Bind @var{symbol} to @var{val} in @var{parser-smob}'s module.")
 154 {
 155
 156   LY_ASSERT_SMOB (Lily_parser, parser_smob, 1);
 157   Lily_parser *parser = unsmob_lily_parser (parser_smob);
 158
 159   LY_ASSERT_TYPE (ly_is_symbol, symbol, 2);
 160
 161   parser->lexer_->set_identifier (scm_symbol_to_string (symbol), val);
 162   return SCM_UNSPECIFIED;
 163 }
 164
 165 LY_DEFINE (ly_parser_lookup, "ly:parser-lookup",
 166            2, 0, 0, (SCM parser_smob, SCM symbol),
 167            "Look up @var{symbol} in @var{parser-smob}'s module."
 168            "  Return @code{'()} if not defined.")
 169 {
 170   LY_ASSERT_SMOB (Lily_parser, parser_smob, 1);
 171
 172   Lily_parser *parser = unsmob_lily_parser (parser_smob);
 173
 174   LY_ASSERT_TYPE (ly_is_symbol, symbol, 2);
 175
 176   SCM val = parser->lexer_->lookup_identifier (ly_scm2string (scm_symbol_to_string (symbol)));
 177   if (val != SCM_UNDEFINED)
 178     return val;
 179   else
 180     return SCM_EOL;
 181 }
 182
 183 LY_DEFINE (ly_parser_parse_string, "ly:parser-parse-string",
 184            2, 0, 0, (SCM parser_smob, SCM ly_code),
 185            "Parse the string @var{ly-code} with @var{parser-smob}."
 186            "  Upon failure, throw @code{ly-file-failed} key.")
 187 {
 188   LY_ASSERT_SMOB (Lily_parser, parser_smob, 1);
 189   Lily_parser *parser = unsmob_lily_parser (parser_smob);
 190   LY_ASSERT_TYPE (scm_is_string, ly_code, 2);
 191
 192   parser->parse_string (ly_scm2string (ly_code));
 193
 194   return SCM_UNSPECIFIED;
 195 }
 196
 197 LY_DEFINE (ly_parser_set_note_names, "ly:parser-set-note-names",
 198            2, 0, 0, (SCM parser, SCM names),
 199            "Replace current note names in @var{parser}."
 200            "  @var{names} is an alist of symbols.  This only has effect"
 201            " if the current mode is notes.")
 202 {
 203   LY_ASSERT_SMOB (Lily_parser, parser, 1);
 204   Lily_parser *p = unsmob_lily_parser (parser);
 205
 206   if (p->lexer_->is_note_state ())
 207     {
 208       p->lexer_->pop_state ();
 209       p->lexer_->push_note_state (alist_to_hashq (names));
 210     }
 211
 212   return SCM_UNSPECIFIED;
 213 }
 214
 215 LY_DEFINE (ly_parser_set_repetition_symbol, "ly:parser-set-repetition-symbol",
 216            2, 0, 0, (SCM parser, SCM sym),
 217            "Replace the current repetition symbol in @var{parser}."
 218            "  @var{sym} is the new repetition symbol.")
 219 {
 220   LY_ASSERT_SMOB (Lily_parser, parser, 1);
 221   Lily_parser *p = unsmob_lily_parser (parser);
 222
 223   p->lexer_->chord_repetition_.repetition_symbol_ = sym;
 224
 225   return SCM_UNSPECIFIED;
 226 }
 227
 228 LY_DEFINE (ly_parser_set_repetition_function, "ly:parser-set-repetition-function",
 229            2, 0, 0, (SCM parser, SCM fun),
 230            "Replace the current repetition function in @var{parser}."
 231            "  @var{fun} is the new repetition function.")
 232 {
 233   LY_ASSERT_SMOB (Lily_parser, parser, 1);
 234   Lily_parser *p = unsmob_lily_parser (parser);
 235
 236   p->lexer_->chord_repetition_.repetition_function_ = fun;
 237
 238   return SCM_UNSPECIFIED;
 239 }
 240
 241 LY_DEFINE (ly_parser_output_name, "ly:parser-output-name",
 242            1, 0, 0, (SCM parser),
 243            "Return the base name of the output file.")
 244 {
 245   LY_ASSERT_SMOB (Lily_parser, parser, 1);
 246   Lily_parser *p = unsmob_lily_parser (parser);
 247
 248   return ly_string2scm (p->output_basename_);
 249 }
 250
 251 LY_DEFINE (ly_parser_error, "ly:parser-error",
 252            2, 1, 0, (SCM parser, SCM msg, SCM input),
 253            "Display an error message and make the parser fail.")
 254 {
 255   LY_ASSERT_SMOB (Lily_parser, parser, 1);
 256   Lily_parser *p = unsmob_lily_parser (parser);
 257
 258   LY_ASSERT_TYPE (scm_is_string, msg, 2);
 259   string s = ly_scm2string (msg);
 260
 261   Input *i = unsmob_input (input);
 262   if (i)
 263     p->parser_error (*i, s);
 264   else
 265     p->parser_error (s);
 266
 267   return parser;
 268 }
 269
 270 LY_DEFINE (ly_parser_clear_error, "ly:parser-clear-error",
 271            1, 0, 0, (SCM parser),
 272            "Clear the error flag for the parser.")
 273 {
 274   LY_ASSERT_SMOB (Lily_parser, parser, 1);
 275   Lily_parser *p = unsmob_lily_parser (parser);
 276
 277
 278   p->error_level_ = 0;
 279   p->lexer_->error_level_ = 0;
 280
 281   return SCM_UNSPECIFIED;
 282 }
 283
 284 LY_DEFINE (ly_parser_has_error_p, "ly:parser-has-error?",
 285            1, 0, 0, (SCM parser),
 286            "Does @var{parser} have an error flag?")
 287 {
 288   LY_ASSERT_SMOB (Lily_parser, parser, 1);
 289   Lily_parser *p = unsmob_lily_parser (parser);
 290
 291   return scm_from_bool (p->error_level_ || p->lexer_->error_level_);
 292 }