diff --git a/src/frontend/grammar.y b/src/frontend/grammar.y
index 876f48a04a2d718864020473304e30d34ca0848a..50bb00e7f632fa35abb283ca7025b0c02a80a908 100644 (file)
--- a/src/frontend/grammar.y
+++ b/src/frontend/grammar.y
%{
-#include "frontend/connection.h"
+#include "frontend/connection-private.h"
#include "frontend/parser.h"
#include "frontend/grammar.h"
+#include "core/store.h"
+
#include "utils/error.h"
#include "utils/llist.h"
#include <stdio.h>
+#include <string.h>
+
+int
+sdb_fe_yylex(YYSTYPE *yylval, YYLTYPE *yylloc, sdb_fe_yyscan_t yyscanner);
sdb_fe_yyextra_t *
sdb_fe_yyget_extra(sdb_fe_yyscan_t scanner);
/* quick access to the current parse tree */
#define pt sdb_fe_yyget_extra(scanner)->parsetree
+/* quick access to the parser mode */
+#define parser_mode sdb_fe_yyget_extra(scanner)->mode
+
%}
%pure-parser
%name-prefix="sdb_fe_yy"
%union {
+ char *str;
+
sdb_llist_t *list;
sdb_conn_node_t *node;
}
%token SCANNER_ERROR
-%token IDENTIFIER
-%token <node> LIST
+%token WHERE
+
+%token <str> IDENTIFIER STRING
+%token <node> FETCH LIST LOOKUP
%type <list> statements
%type <node> statement
+ fetch_statement
list_statement
+ lookup_statement
+ expression
%%
statements:
statements ';' statement
{
+ /* only accept this in default parse mode */
+ if (parser_mode != SDB_PARSE_DEFAULT) {
+ sdb_fe_yyerror(&yylloc, scanner,
+ YY_("syntax error, unexpected statement, "
+ "expecting expression"));
+ YYABORT;
+ }
+
if ($3) {
sdb_llist_append(pt, SDB_OBJ($3));
sdb_object_deref(SDB_OBJ($3));
|
statement
{
+ /* only accept this in default parse mode */
+ if (parser_mode != SDB_PARSE_DEFAULT) {
+ sdb_fe_yyerror(&yylloc, scanner,
+ YY_("syntax error, unexpected statement, "
+ "expecting expression"));
+ YYABORT;
+ }
+
+ if ($1) {
+ sdb_llist_append(pt, SDB_OBJ($1));
+ sdb_object_deref(SDB_OBJ($1));
+ }
+ }
+ |
+ expression
+ {
+ /* only accept this in expression parse mode */
+ if (! (parser_mode & SDB_PARSE_EXPR)) {
+ sdb_fe_yyerror(&yylloc, scanner,
+ YY_("syntax error, unexpected expression, "
+ "expecting statement"));
+ YYABORT;
+ }
+
if ($1) {
sdb_llist_append(pt, SDB_OBJ($1));
sdb_object_deref(SDB_OBJ($1));
;
statement:
+ fetch_statement
+ |
list_statement
|
+ lookup_statement
+ |
/* empty */
{
$$ = NULL;
}
;
+/*
+ * FETCH <hostname>;
+ *
+ * Retrieve detailed information about a single host.
+ */
+fetch_statement:
+ FETCH STRING
+ {
+ $$ = SDB_CONN_NODE(sdb_object_create_dT(/* name = */ NULL,
+ conn_fetch_t, conn_fetch_destroy));
+ CONN_FETCH($$)->name = strdup($2);
+ $$->cmd = CONNECTION_FETCH;
+ free($2);
+ $2 = NULL;
+ }
+ ;
+
+/*
+ * LIST;
+ *
+ * Returns a list of all hosts in the store.
+ */
list_statement:
LIST
{
- $$ = sdb_object_create_T(/* name = */ NULL, sdb_conn_node_t);
- ((sdb_conn_node_t *)$$)->cmd = CONNECTION_LIST;
+ $$ = SDB_CONN_NODE(sdb_object_create_T(/* name = */ NULL,
+ sdb_conn_node_t));
+ $$->cmd = CONNECTION_LIST;
+ }
+ ;
+
+/*
+ * LOOKUP <type> WHERE <expression>;
+ *
+ * Returns detailed information about <type> matching expression.
+ */
+lookup_statement:
+ LOOKUP IDENTIFIER WHERE expression
+ {
+ /* TODO: support other types as well */
+ if (strcasecmp($2, "hosts")) {
+ char errmsg[strlen($2) + 32];
+ snprintf(errmsg, sizeof(errmsg),
+ YY_("unknown table %s"), $2);
+ sdb_fe_yyerror(&yylloc, scanner, errmsg);
+ YYABORT;
+ }
+
+ $$ = SDB_CONN_NODE(sdb_object_create_dT(/* name = */ NULL,
+ conn_lookup_t, conn_lookup_destroy));
+ CONN_LOOKUP($$)->matcher = CONN_MATCHER($4);
+ $$->cmd = CONNECTION_LOOKUP;
+ free($2);
+ $2 = NULL;
+ }
+ ;
+
+expression:
+ STRING
+ {
+ $$ = SDB_CONN_NODE(sdb_object_create_T(/* name = */ NULL,
+ conn_node_matcher_t));
+ $$->cmd = CONNECTION_EXPR;
+ /* XXX: this is just a placeholder for now */
+ CONN_MATCHER($$)->matcher = sdb_store_host_matcher($1,
+ /* name_re = */ NULL, /* service = */ NULL,
+ /* attr = */ NULL);
+ free($1);
+ $1 = NULL;
}
;