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 Han-Wen Nienhuys <hanwen@xs4all.nl>
   7 */
   8
   9 #include <unistd.h>
  10
  11 #include "file-name.hh"
  12 #include "file-path.hh"
  13 #include "main.hh"
  14 #include "lily-parser.hh"
  15 #include "warn.hh"
  16 #include "source.hh"
  17 #include "lily-lexer.hh"
  18 #include "ly-module.hh"
  19 #include "file-name-map.hh"
  20
  21 /* Do not append `!' suffix, since 1st argument is not modified. */
  22 LY_DEFINE (ly_set_point_and_click, "ly:set-point-and-click",
  23            1, 0, 0, (SCM what),
  24            "Deprecated.")
  25 {
  26   (void) what;
  27   warning (_f ("deprecated function called: %s", "ly:set-point-and-click"));
  28   return SCM_UNSPECIFIED;
  29 }
  30
  31 LY_DEFINE (ly_parse_file, "ly:parse-file",
  32            1, 0, 0, (SCM name),
  33            "Parse a single @code{.ly} file.  "
  34            "Upon failure, throw @code{ly-file-failed} key.")
  35 {
  36   SCM_ASSERT_TYPE (scm_is_string (name), name, SCM_ARG1, __FUNCTION__, "string");
  37   char const *file = scm_i_string_chars (name);
  38   char const *extensions[] = {"ly", "", 0};
  39
  40   String file_name = global_path.find (file, extensions);
  41
  42   /* By default, use base name of input file for output file name,
  43      write output to cwd; do not use root and directory parts of input
  44      file name.  */
  45   File_name out_file_name (file_name);
  46
  47   global_path.append (out_file_name.dir_);
  48
  49   out_file_name.ext_ = "";
  50   out_file_name.root_ = "";
  51   out_file_name.dir_ = "";
  52
  53   /* When running from gui, generate output in .ly source directory.  */
  54   if (output_name_global.is_empty ()
  55       && scm_call_0 (ly_lily_module_constant ("running-from-gui?")) == SCM_BOOL_T)
  56     {
  57       File_name f (file);
  58       f.base_ = "";
  59       f.ext_ = "";
  60       output_name_global = f.to_string ();
  61     }
  62
  63   if (!output_name_global.is_empty ())
  64     {
  65       /* Interpret --output=DIR to mean --output=DIR/BASE.  */
  66       if (is_dir (output_name_global))
  67         {
  68           char cwd[PATH_MAX];
  69           getcwd (cwd, PATH_MAX);
  70
  71           if (output_name_global != cwd)
  72             {
  73               global_path.prepend (cwd);
  74               message (_f ("Changing working directory to `%s'",
  75                            output_name_global.to_str0 ()));
  76               chdir (output_name_global.to_str0 ());
  77
  78             }
  79           output_name_global = "";
  80         }
  81       else
  82         out_file_name = File_name (output_name_global);
  83     }
  84
  85   String init;
  86   if (!init_name_global.is_empty ())
  87     init = init_name_global;
  88   else
  89     init = "init.ly";
  90
  91   String out_file = out_file_name.to_string ();
  92
  93   if (init.length () && global_path.find (init).is_empty ())
  94     {
  95       warning (_f ("can't find init file: `%s'", init));
  96       warning (_f ("(search path: `%s')",
  97                    global_path.to_string ().to_str0 ()));
  98       exit (2);
  99     }
 100
 101   if ((file_name != "-") && global_path.find (file_name).is_empty ())
 102     {
 103       warning (_f ("can't find file: `%s'", file_name));
 104       scm_throw (ly_symbol2scm ("ly-file-failed"),
 105                  scm_list_1 (scm_makfrom0str (file_name.to_str0 ())));
 106     }
 107   else
 108     {
 109       Sources sources;
 110       sources.set_path (&global_path);
 111
 112       String mapped_fn = map_file_name (file_name);
 113       message (_f ("Processing `%s'", mapped_fn.to_str0 ()));
 114       progress_indication ("\n");
 115
 116       Lily_parser *parser = new Lily_parser (&sources);
 117
 118       parser->parse_file (init, file_name, out_file);
 119
 120       bool error = parser->error_level_;
 121       scm_gc_unprotect_object (parser->self_scm ());
 122       parser = 0;
 123       if (error)
 124         /* TODO: pass renamed input file too.  */
 125         scm_throw (ly_symbol2scm ("ly-file-failed"),
 126                    scm_list_1 (scm_makfrom0str (file_name.to_str0 ())));
 127     }
 128   return SCM_UNSPECIFIED;
 129 }
 130
 131 LY_DEFINE (ly_parse_string, "ly:parse-string",
 132            1, 0, 0, (SCM ly_code),
 133            "Parse the string LY_CODE.  "
 134            "Upon failure, throw @code{ly-file-failed} key.")
 135 {
 136   SCM_ASSERT_TYPE (scm_is_string (ly_code), ly_code, SCM_ARG1, __FUNCTION__, "string");
 137
 138   Sources sources;
 139   sources.set_path (&global_path);
 140   Lily_parser *parser = new Lily_parser (&sources);
 141   scm_module_define (global_lily_module, ly_symbol2scm ("parser"),
 142                      parser->self_scm ());
 143   parser->parse_string (ly_scm2string (ly_code));
 144   scm_gc_unprotect_object (parser->self_scm ());
 145   parser = 0;
 146
 147   return SCM_UNSPECIFIED;
 148 }
 149
 150 LY_DEFINE (ly_clone_parser, "ly:clone-parser",
 151            1, 0, 0, (SCM parser_smob),
 152            "Return a clone of PARSER_SMOB.")
 153 {
 154   Lily_parser *parser = unsmob_lily_parser (parser_smob);
 155   Lily_parser *clone = new Lily_parser (*parser);
 156
 157   return scm_gc_unprotect_object (clone->self_scm ());
 158 }
 159
 160 LY_DEFINE (ly_parser_define, "ly:parser-define",
 161            3, 0, 0, (SCM parser_smob, SCM symbol, SCM val),
 162            "Bind SYMBOL to VAL in PARSER_SMOB's module.")
 163 {
 164   Lily_parser *parser = unsmob_lily_parser (parser_smob);
 165   SCM_ASSERT_TYPE (scm_is_symbol (symbol), symbol, SCM_ARG2, __FUNCTION__, "symbol");
 166   SCM_ASSERT_TYPE (parser, parser_smob, SCM_ARG2, __FUNCTION__, "parser");
 167
 168   parser->lexer_->set_identifier (scm_symbol_to_string (symbol), val);
 169   return SCM_UNSPECIFIED;
 170 }
 171
 172 LY_DEFINE (ly_parser_lookup, "ly:parser-lookup",
 173            2, 0, 0, (SCM parser_smob, SCM symbol),
 174            "Lookup @var{symbol} in @var{parser_smob}'s module.  "
 175            "Undefined is '().")
 176 {
 177   Lily_parser *parser = unsmob_lily_parser (parser_smob);
 178
 179   SCM_ASSERT_TYPE (scm_is_symbol (symbol), symbol, SCM_ARG2, __FUNCTION__, "symbol");
 180   SCM_ASSERT_TYPE (parser, parser_smob, SCM_ARG2, __FUNCTION__, "parser");
 181
 182   SCM val = parser->lexer_->lookup_identifier (ly_scm2string (scm_symbol_to_string (symbol)));
 183   if (val != SCM_UNDEFINED)
 184     return val;
 185   else
 186     return SCM_EOL;
 187 }
 188
 189 LY_DEFINE (ly_parser_parse_string, "ly:parser-parse-string",
 190            2, 0, 0, (SCM parser_smob, SCM ly_code),
 191            "Parse the string LY_CODE with PARSER_SMOB."
 192            "Upon failure, throw @code{ly-file-failed} key.")
 193 {
 194   Lily_parser *parser = unsmob_lily_parser (parser_smob);
 195
 196   SCM_ASSERT_TYPE (parser, parser_smob, SCM_ARG1, __FUNCTION__, "parser");
 197   SCM_ASSERT_TYPE (scm_is_string (ly_code), ly_code, SCM_ARG2, __FUNCTION__, "string");
 198
 199   parser->parse_string (ly_scm2string (ly_code));
 200
 201   return SCM_UNSPECIFIED;
 202 }
 203
 204 LY_DEFINE (ly_parser_set_note_names, "ly:parser-set-note-names",
 205            2, 0, 0, (SCM parser, SCM names),
 206            "Replace current note names in @var{parser}. "
 207            "@var{names} is an alist of symbols.  "
 208            "This only has effect if the current mode is notes.")
 209 {
 210   Lily_parser *p = unsmob_lily_parser (parser);
 211   SCM_ASSERT_TYPE (p, parser, SCM_ARG1, __FUNCTION__, "Lilypond parser");
 212
 213   if (p->lexer_->is_note_state ())
 214     {
 215       p->lexer_->pop_state ();
 216       p->lexer_->push_note_state (alist_to_hashq (names));
 217     }
 218
 219   return SCM_UNSPECIFIED;
 220 }