/*
- parse-scm -- Parse a single SCM expression exactly.
+ This file is part of LilyPond, the GNU music typesetter.
- source file of the GNU LilyPond music typesetter
+ Copyright (C) 2004--2014 Han-Wen Nienhuys <hanwen@xs4all.nl>
- (c) 2004--2007 Han-Wen Nienhuys <hanwen@xs4all.nl>
+ LilyPond is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ LilyPond is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with LilyPond. If not, see <http://www.gnu.org/licenses/>.
*/
#include "parse-scm.hh"
#include <cstdio>
using namespace std;
+#include "lily-parser.hh"
+#include "lily-lexer.hh"
#include "international.hh"
#include "main.hh"
#include "paper-book.hh"
#include "source-file.hh"
-/* Pass string to scm parser, evaluate one expression.
+/* Pass string to scm parser, read one expression.
Return result value and #chars read.
Thanks to Gary Houston <ghouston@freewire.co.uk> */
Source_file *sf = ps->start_location_.get_source_file ();
SCM port = sf->get_port ();
- int off = ps->start_location_.start () - sf->c_str ();
+ long off = ps->start_location_.start () - sf->c_str ();
- scm_seek (port, scm_long2num (off), scm_long2num (SEEK_SET));
+ scm_seek (port, scm_from_long (off), scm_from_long (SEEK_SET));
SCM from = scm_ftell (port);
- scm_set_port_line_x (port, scm_from_int (ps->start_location_.line_number () -1));
- scm_set_port_column_x (port, scm_from_int (ps->start_location_.column_number () -1));
-
- SCM answer = SCM_UNSPECIFIED;
+ scm_set_port_line_x (port, scm_from_int (ps->start_location_.line_number () - 1));
+ scm_set_port_column_x (port, scm_from_int (ps->start_location_.column_number () - 1));
+
+ bool multiple = ly_is_equal (scm_peek_char (port), SCM_MAKE_CHAR ('@'));
+
+ if (multiple)
+ (void) scm_read_char (port);
+
SCM form = scm_read (port);
+ SCM to = scm_ftell (port);
+
+ ps->nchars = scm_to_int (to) - scm_to_int (from);
- /* Read expression from port. */
if (!SCM_EOF_OBJECT_P (form))
{
- if (ps->safe_)
- {
- static SCM module = SCM_BOOL_F;
- if (module == SCM_BOOL_F)
- {
- SCM function = ly_lily_module_constant ("make-safe-lilypond-module");
- module = scm_call_0 (function);
- }
- answer = scm_eval (form, module);
- }
- else
- answer = scm_primitive_eval (form);
+ if (ps->parser_->lexer_->top_input ())
+ {
+ // Find any precompiled form.
+ SCM c = scm_assv_ref (ps->parser_->closures_, from);
+ if (scm_is_true (c))
+ // Replace form with a call to previously compiled closure
+ form = scm_list_1 (c);
+ }
+ if (multiple)
+ form = scm_list_3 (ly_symbol2scm ("apply"),
+ ly_symbol2scm ("values"),
+ form);
+ return scm_cons (form, make_input (ps->start_location_));
}
- /* Reset read_buf for scm_ftell.
- Shouldn't scm_read () do this for us? */
- scm_fill_input (port);
- SCM to = scm_ftell (port);
- ps->nchars = scm_to_int (to) - scm_to_int (from);
-
/* Don't close the port here; if we re-enter this function via a
continuation, then the next time we enter it, we'll get an error.
It's a string port anyway, so there's no advantage to closing it
early. */
// scm_close_port (port);
- return answer;
+ return SCM_UNDEFINED;
+}
+
+SCM
+internal_ly_eval_scm (Parse_start *ps)
+{
+ if (ps->safe_)
+ {
+ static SCM module = SCM_BOOL_F;
+ if (module == SCM_BOOL_F)
+ {
+ SCM function = ly_lily_module_constant ("make-safe-lilypond-module");
+ module = scm_gc_protect_object (scm_call_0 (function));
+ }
+
+ // We define the parser so trusted Scheme functions can
+ // access the real namespace underlying the parser.
+ if (ps->parser_)
+ scm_module_define (module, ly_symbol2scm ("parser"),
+ ps->parser_->self_scm ());
+ return scm_eval (ps->form_, module);
+ }
+ return scm_primitive_eval (ps->form_);
}
SCM
{
Parse_start *ps = (Parse_start *) p;
- return internal_ly_parse_scm (ps);
+ return (*ps->func_) (ps);
}
SCM
parse_handler (void *data, SCM tag, SCM args)
{
Parse_start *ps = (Parse_start *) data;
- (void) tag;
ps->start_location_.error (_ ("GUILE signaled an error for the expression beginning here"));
if (scm_ilength (args) > 2)
scm_display_error_message (scm_cadr (args), scm_caddr (args), scm_current_error_port ());
- /*
- The following is a kludge; we should probably search for
- [a-z][0-9] (a note), and start before that.
- */
- ps->nchars = 1;
+ if (tag == ly_symbol2scm ("read-error"))
+ ps->nchars = 1;
return SCM_UNDEFINED;
}
/*
Catch #t : catch all Scheme level errors.
*/
- return scm_internal_catch (SCM_BOOL_T,
- &catch_protected_parse_body,
- (void *) ps,
- &parse_handler, (void *) ps);
+ return scm_internal_catch (SCM_BOOL_T,
+ &catch_protected_parse_body,
+ (void *) ps,
+ &parse_handler, (void *) ps);
}
bool parse_protect_global = true;
bool parsed_objects_should_be_dead = false;
-/* Try parsing. Upon failure return SCM_UNDEFINED.
- FIXME: shouldn't we return SCM_UNSCPECIFIED -- jcn */
+/* Try parsing. Upon failure return SCM_UNDEFINED. */
+
SCM
-ly_parse_scm (char const *s, int *n, Input i, bool safe)
+ly_parse_scm (char const *s, int *n, Input i, bool safe, Lily_parser *parser)
{
Parse_start ps;
ps.str = s;
ps.start_location_ = i;
ps.safe_ = safe;
+ ps.form_ = SCM_UNDEFINED;
+ ps.parser_ = parser;
+ ps.func_ = internal_ly_parse_scm;
SCM ans = parse_protect_global ? protected_ly_parse_scm (&ps)
- : internal_ly_parse_scm (&ps);
+ : internal_ly_parse_scm (&ps);
*n = ps.nchars;
return ans;
}
+SCM
+ly_eval_scm (SCM form, Input i, bool safe, Lily_parser *parser)
+{
+ Parse_start ps;
+ ps.str = 0;
+ ps.start_location_ = i;
+ ps.safe_ = safe;
+ ps.form_ = form;
+ ps.parser_ = parser;
+ ps.func_ = internal_ly_eval_scm;
+
+ SCM ans = parse_protect_global ? protected_ly_parse_scm (&ps)
+ : internal_ly_eval_scm (&ps);
+ scm_remember_upto_here_1 (form);
+ return ans;
+}
projects / lilypond.git / blobdiff