diff --git a/src/frontend/grammar.y b/src/frontend/grammar.y
index 3802c9c97de1aa70c8d387acd99df728c70ed0bb..fd268baf3a9c6ce5126891c9ff6edbcc8af16e4f 100644 (file)
--- a/src/frontend/grammar.y
+++ b/src/frontend/grammar.y
#include "frontend/grammar.h"
#include "core/store.h"
+#include "core/store-private.h"
#include "utils/error.h"
#include "utils/llist.h"
sdb_llist_t *list;
sdb_conn_node_t *node;
+
+ sdb_store_matcher_t *m;
}
%start statements
%token SCANNER_ERROR
+%token AND OR WHERE
+
+%token CMP_EQUAL CMP_REGEX
+
%token <str> IDENTIFIER STRING
-%token <node> FETCH LIST
+%token <node> FETCH LIST LOOKUP
+
+/* Precedence (lowest first): */
+%left OR
+%left AND
+%left CMP_EQUAL
+%left CMP_REGEX
%type <list> statements
%type <node> statement
fetch_statement
list_statement
+ lookup_statement
expression
+%type <m> matcher
+ compare_matcher
+
%%
statements:
|
list_statement
|
+ lookup_statement
+ |
/* empty */
{
$$ = NULL;
conn_fetch_t, conn_fetch_destroy));
CONN_FETCH($$)->name = strdup($2);
$$->cmd = CONNECTION_FETCH;
- free($2);
- $2 = NULL;
+ free($2); $2 = NULL;
}
;
}
;
+/*
+ * LOOKUP <type> WHERE <expression>;
+ *
+ * Returns detailed information about <type> matching expression.
+ */
+lookup_statement:
+ LOOKUP IDENTIFIER WHERE expression
+ {
+ /* TODO: support other types as well */
+ if (strcasecmp($2, "hosts")) {
+ char errmsg[strlen($2) + 32];
+ snprintf(errmsg, sizeof(errmsg),
+ YY_("unknown table %s"), $2);
+ sdb_fe_yyerror(&yylloc, scanner, errmsg);
+ YYABORT;
+ }
+
+ $$ = 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
+ matcher
{
+ sdb_store_matcher_t *m = $1;
+ if (! m) {
+ /* TODO: improve error reporting */
+ sdb_fe_yyerror(&yylloc, scanner,
+ YY_("syntax error, invalid expression"));
+ YYABORT;
+ }
+
$$ = SDB_CONN_NODE(sdb_object_create_T(/* name = */ NULL,
conn_node_matcher_t));
$$->cmd = CONNECTION_EXPR;
- /* XXX: this is just a placeholder for now */
- CONN_MATCHER($$)->matcher = sdb_store_host_matcher($1,
- /* name_re = */ NULL, /* service = */ NULL,
- /* attr = */ NULL);
- free($1);
- $1 = NULL;
+
+ if ((M(m)->type == MATCHER_HOST)
+ || (M(m)->type == MATCHER_AND)
+ || (M(m)->type == MATCHER_OR))
+ CONN_MATCHER($$)->matcher = m;
+ else if (M(m)->type == MATCHER_SERVICE)
+ CONN_MATCHER($$)->matcher = sdb_store_host_matcher(NULL,
+ /* name_re = */ NULL, /* service = */ m,
+ /* attr = */ NULL);
+ else if (M(m)->type == MATCHER_ATTR)
+ CONN_MATCHER($$)->matcher = sdb_store_host_matcher(NULL,
+ /* name_re = */ NULL, /* service = */ NULL,
+ /* attr = */ m);
+ else {
+ char errbuf[1024];
+ snprintf(errbuf, sizeof(errbuf),
+ YY_("syntax error, unexpected matcher type %d"),
+ M(m)->type);
+ sdb_fe_yyerror(&yylloc, scanner, errbuf);
+ YYABORT;
+ }
+ }
+ ;
+
+matcher:
+ matcher AND matcher
+ {
+ $$ = sdb_store_con_matcher($1, $3);
+ }
+ |
+ matcher OR matcher
+ {
+ $$ = sdb_store_dis_matcher($1, $3);
+ }
+ |
+ compare_matcher
+ {
+ $$ = $1;
+ }
+ ;
+
+/*
+ * <object_type>.<object_attr> <op> <value>
+ *
+ * Parse matchers comparing object attributes with a value.
+ */
+compare_matcher:
+ IDENTIFIER '.' IDENTIFIER CMP_EQUAL STRING
+ {
+ $$ = sdb_store_matcher_parse_cmp($1, $3, "=", $5);
+ /* TODO: simplify memory management in the parser */
+ free($1); $1 = NULL;
+ free($3); $3 = NULL;
+ free($5); $5 = NULL;
+ }
+ |
+ IDENTIFIER '.' IDENTIFIER CMP_REGEX STRING
+ {
+ $$ = sdb_store_matcher_parse_cmp($1, $3, "=~", $5);
+ free($1); $1 = NULL;
+ free($3); $3 = NULL;
+ free($5); $5 = NULL;
}
;