summaryrefslogtreecommitdiffabout
path: root/src/meta1-gram.y
blob: 3b9ca639aeae1732d12b581ea3de8e6c0ce15ab0 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
%{
/* MeTA1 configuration parser for Grecs.
   Copyright (C) 2007-2016 Sergey Poznyakoff

   Grecs 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.

   Grecs 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 Grecs. If not, see <http://www.gnu.org/licenses/>. */

#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <errno.h>
#include <string.h>
#include "grecs.h"

int yylex(void);
int yyerror(char const *s);
	
static struct grecs_node *parse_tree;
extern int yy_flex_debug;
extern void yyset_in(FILE *);
%}

%error-verbose
%locations

%union {
	char *string;
	grecs_value_t svalue, *pvalue;
	struct grecs_list *list;
	struct { struct grecs_node *head, *tail; } node_list;
	struct grecs_node *node;
}

%token <string> META1_STRING META1_IDENT
%type <node> stmt simple block maybe_stmtlist
%type <node_list> stmtlist
%type <pvalue> tag value
%type <string> string slist
%type <list> slist0
%type <list> values list 
%%

input   : maybe_stmtlist
          {
		  parse_tree = grecs_node_create(grecs_node_root, &@1);
		  parse_tree->v.texttab = grecs_text_table();
		  grecs_node_bind(parse_tree, $1, 1);
	  }
        ;

maybe_stmtlist:
          /* empty */
          {
		  $$ = NULL;
	  }
        | stmtlist
	  {
		  $$ = $1.head;
	  }
        ;

stmtlist: stmt
          {
		  $$.head = $$.tail = $1;
	  }
        | stmtlist stmt
          {
		  grecs_node_bind($1.tail, $2, 0);
	  }
        ;

stmt    : simple
        | block
        ;

simple  : META1_IDENT '=' value opt_sc
          {
		  $$ = grecs_node_create_points(grecs_node_stmt,
						@1.beg, @3.end);
		  $$->ident = $1;
		  $$->idloc = @1;
		  $$->v.value = $3;
	  }
        ;

block   : META1_IDENT tag '{' stmtlist '}' opt_sc
          {
		  $$ = grecs_node_create_points(grecs_node_block,
						@1.beg, @5.end);
		  $$->ident = $1;
		  $$->idloc = @1;
		  $$->v.value = $2;
		  grecs_node_bind($$, $4.head, 1);
	  }
        ;

tag     : /* empty */
          {
		  $$ = NULL;
	  }
        | META1_IDENT
	  {
		  $$ = grecs_malloc(sizeof($$[0]));
		  $$->type = GRECS_TYPE_STRING;
		  $$->v.string = $1;
	  }		  
	;

value   : string
          {
		  $$ = grecs_malloc(sizeof($$[0]));
		  $$->type = GRECS_TYPE_STRING;
		  $$->locus = @1;
		  $$->v.string = $1;
	  }
        | list
          {
		  $$ = grecs_malloc(sizeof($$[0]));
		  $$->type = GRECS_TYPE_LIST;
		  $$->locus = @1;
		  $$->v.list = $1;
	  }
        ;

string  : META1_IDENT
        | slist
        ;

slist   : slist0
          {
		  struct grecs_list_entry *ep;
		  
		  grecs_line_begin();
		  for (ep = $1->head; ep; ep = ep->next) {
			  grecs_line_add(ep->data, strlen(ep->data));
			  free(ep->data);
			  ep->data = NULL;
		  }
		  $$ = grecs_line_finish();
		  grecs_list_free($1);
	  }		  

slist0  : META1_STRING 
          {
		  $$ = grecs_list_create();
		  grecs_list_append($$, $1);
	  }
        | slist0 META1_STRING
          {
		  grecs_list_append($1, $2);
		  $$ = $1;
	  }
        ;

list    : '{' values '}'
          {
		  $$ = $2;
	  }
        | '{' values ',' '}'
          {
		  $$ = $2;
	  }
        ;

values  : value
          {
		  $$ = grecs_value_list_create();
		  grecs_list_append($$, $1);
	  }
        | values ',' value
          {
		  grecs_list_append($1, $3);
		  $$ = $1;
	  }
        ;

opt_sc  : /* empty */
        | ';'
        ;
	  
%%
int
yyerror(char const *s)
{
	grecs_error(&yylloc, 0, "%s", s);
	return 0;
}

struct grecs_node *
grecs_meta1_parser(const char *name, int traceflags)
{
	int rc;
	FILE *fp;

	fp = fopen(name, "r");
	if (!fp) {
		grecs_error(NULL, errno, _("Cannot open `%s'"), name);
		return NULL;
	}
	yyset_in(fp);
	yy_flex_debug = traceflags & GRECS_TRACE_LEX;
	yydebug = traceflags & GRECS_TRACE_GRAM;
	parse_tree = NULL;
	grecs_line_acc_create();
	rc = yyparse();
	fclose(fp);
	if (grecs_error_count)
		rc = 1;
	grecs_line_acc_free();
	if (rc) {
		grecs_tree_free(parse_tree);
		parse_tree = NULL;
	}
	return parse_tree;
}
	

Return to:

Send suggestions and report system problems to the System administrator.