1 /* grecs - Gray's Extensible Configuration System
2    Copyright (C) 2007-2016 Sergey Poznyakoff
3 
4    Grecs is free software; you can redistribute it and/or modify it
5    under the terms of the GNU General Public License as published by the
6    Free Software Foundation; either version 3 of the License, or (at your
7    option) any later version.
8 
9    Grecs is distributed in the hope that it will be useful,
10    but WITHOUT ANY WARRANTY; without even the implied warranty of
11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12    GNU General Public License for more details.
13 
14    You should have received a copy of the GNU General Public License along
15    with Grecs. If not, see <http://www.gnu.org/licenses/>. */
16 
17 #ifdef HAVE_CONFIG_H
18 # include <config.h>
19 #endif
20 #include <stdlib.h>
21 #include <string.h>
22 #include <errno.h>
23 #include "grecs.h"
24 
25 int grecs_error_count = 0;
26 int grecs_default_port = 0;
27 
28 int grecs_trace_flags = 0;
29 int grecs_parser_options = 0;
30 
31 #ifndef GRECS_DEFAULT_PARSER
32 # define GRECS_DEFAULT_PARSER grecs_grecs_parser
33 #endif
34 
35 struct grecs_node *(*grecs_parser_fun)(const char *name, int trace) =
36 	GRECS_DEFAULT_PARSER;
37 
38 void
grecs_gram_trace(int n)39 grecs_gram_trace(int n)
40 {
41 	if (n)
42 		grecs_trace_flags |= GRECS_TRACE_GRAM;
43 	else
44 		grecs_trace_flags &= ~GRECS_TRACE_GRAM;
45 }
46 
47 void
grecs_lex_trace(int n)48 grecs_lex_trace(int n)
49 {
50 	if (n)
51 		grecs_trace_flags |= GRECS_TRACE_LEX;
52 	else
53 		grecs_trace_flags &= ~GRECS_TRACE_LEX;
54 }
55 
56 struct grecs_node *
grecs_parse(const char * name)57 grecs_parse(const char *name)
58 {
59 	if (!grecs_trace_flags) {
60 		char *p = getenv("GRECS_DEBUG");
61 		if (p) {
62 			while (*p) {
63 				switch (*p++) {
64 				case 'g':
65 				case 'G':
66 					grecs_trace_flags |= GRECS_TRACE_GRAM;
67 					break;
68 				case 'l':
69 				case 'L':
70 					grecs_trace_flags |= GRECS_TRACE_LEX;
71 					break;
72 				}
73 			}
74 		}
75 	}
76 	grecs_error_count = 0;
77 	grecs_current_locus_point.file = grecs_install_text(name);
78 	grecs_current_locus_point.line = 1;
79 	grecs_current_locus_point.col = 0;
80 	return grecs_parser_fun(name, grecs_trace_flags);
81 }
82