* THANKS: Create skeleton for 2.1.

[lilypond.git] / lily / parse-scm.cc

diff --git a/lily/parse-scm.cc b/lily/parse-scm.cc
index 7c50e772fc4e594e5cf2fc602de89aa47b1c46a3..3204dec58a3216116ec4d4cf2648272eeff6383d 100644 (file)
--- a/lily/parse-scm.cc
+++ b/lily/parse-scm.cc
@@ -1,8 +1,9 @@
+#include <stdio.h>
 
 #include "lily-guile.hh"
 #include "parse-scm.hh"
 #include "string.hh"
-
+#include "source-file.hh"
 
 /*
   Pass string to scm parser, evaluate one expression.
@@ -15,22 +16,12 @@
 SCM
 internal_ly_parse_scm (Parse_start * ps)
 {
-  /*
-    
-    This is actually pretty wasteful: we stuff the rest of the entire
-    file down GUILE, while we usually need only a bit of it.
-
-    TODO: implement read_only_string_port(), (preferably in GUILE ?)
-    
-   */
-  SCM str = scm_makfrom0str (ps->str);
-  SCM port = scm_mkstrport (SCM_INUM0, str, SCM_OPN | SCM_RDNG,
-                            "ly_eval_scm_0str");
+  Source_file* sf =ps->start_location_.source_file_;
+  SCM port = sf->get_port();
 
-  scm_set_port_filename_x (port, scm_makfrom0str (ps->start_location.file_string ().get_str0()));
-  scm_set_port_line_x (port,  gh_int2scm (ps->start_location.line_number ()));
-  scm_set_port_column_x (port,  gh_int2scm (ps->start_location.column_number()));
+  int off = ps->start_location_.defined_str0_ - sf->to_str0();
   
+  scm_seek (port, scm_long2num (off), scm_long2num (SEEK_SET));
   SCM from = scm_ftell (port);
 
   SCM form;
@@ -85,7 +76,7 @@ parse_handler (void * data, SCM tag, SCM args)
 {
   Parse_start* ps = (Parse_start*) data;
 
-  ps->start_location.error (_("GUILE signaled an error for the expression begining here"));
+  ps->start_location_.error (_("GUILE signaled an error for the expression beginning here"));
 
   if (scm_ilength (args) > 2)
     scm_display_error_message (gh_cadr (args), gh_caddr(args), scm_current_error_port());
@@ -96,7 +87,7 @@ parse_handler (void * data, SCM tag, SCM args)
    */
   ps->nchars = 1;
     
-  return SCM_EOL;
+  return SCM_UNDEFINED;
 }
 
 /*
@@ -118,19 +109,25 @@ protected_ly_parse_scm (Parse_start *ps)
                             &catch_protected_parse_body,
                             (void*)ps,
                             &parse_handler, (void*)ps);
-
 }
 
+bool  parse_protect_global  = true; 
 
+/*
+  Try parsing. If failure, then return SCM_UNDEFINED.
+ */
 SCM
 ly_parse_scm (char const* s, int *n, Input i)
 {
+  
   Parse_start ps ;
   ps.str = s;
-  ps.start_location = i;
+  ps.start_location_ = i;
 
-  SCM ans = protected_ly_parse_scm (&ps);
+  SCM ans = parse_protect_global ? protected_ly_parse_scm (&ps)
+    : internal_ly_parse_scm (&ps);
   *n = ps.nchars;
+
   return ans;  
 }