X-Git-Url: https://git.tokkee.org/?a=blobdiff_plain;f=src%2Ffrontend%2Fparser.c;h=c82a514a00e7ddb4831805dafbbed8c9c618888e;hb=695324de797b55cf12d8a66bd3612e78bc1235af;hp=037550fbddd731bf4bd84c51c8d126d50466ff16;hpb=ae32792b881853979265e41b49866be9ea2d6b2c;p=sysdb.git

diff --git a/src/frontend/parser.c b/src/frontend/parser.c
index 037550f..c82a514 100644
--- a/src/frontend/parser.c
+++ b/src/frontend/parser.c
@@ -31,33 +31,99 @@
 #include "frontend/parser.h"
 #include "frontend/grammar.h"
 
+#include "core/store.h"
+
 #include "utils/llist.h"
+#include "utils/strbuf.h"
 
+#include <assert.h>
 #include <string.h>
 
+/*
+ * private helper functions
+ */
+
+static int
+scanner_init(const char *input, int len,
+		sdb_fe_yyscan_t *scanner, sdb_fe_yyextra_t *extra,
+		sdb_strbuf_t *errbuf)
+{
+	if (! input) {
+		sdb_strbuf_sprintf(errbuf, "Missing scanner input");
+		return -1;
+	}
+
+	memset(extra, 0, sizeof(*extra));
+	extra->parsetree = sdb_llist_create();
+	extra->mode = SDB_PARSE_DEFAULT;
+	extra->errbuf = errbuf;
+
+	if (! extra->parsetree) {
+		sdb_strbuf_sprintf(errbuf, "Failed to allocate parse-tree");
+		return -1;
+	}
+
+	*scanner = sdb_fe_scanner_init(input, len, extra);
+	if (! scanner) {
+		sdb_llist_destroy(extra->parsetree);
+		return -1;
+	}
+	return 0;
+} /* scanner_init */
+
 /*
  * public API
  */
 
 sdb_llist_t *
-sdb_fe_parse(const char *query)
+sdb_fe_parse(const char *query, int len, sdb_strbuf_t *errbuf)
 {
 	sdb_fe_yyscan_t scanner;
 	sdb_fe_yyextra_t yyextra;
+	sdb_llist_iter_t *iter;
 	int yyres;
 
-	if (! query)
+	if (scanner_init(query, len, &scanner, &yyextra, errbuf))
 		return NULL;
 
-	memset(&yyextra, 0, sizeof(yyextra));
-	yyextra.parsetree = sdb_llist_create();
+	yyres = sdb_fe_yyparse(scanner);
+	sdb_fe_scanner_destroy(scanner);
 
-	scanner = sdb_fe_scanner_init(query, &yyextra);
-	if (! scanner) {
+	if (yyres) {
 		sdb_llist_destroy(yyextra.parsetree);
 		return NULL;
 	}
 
+	iter = sdb_llist_get_iter(yyextra.parsetree);
+	while (sdb_llist_iter_has_next(iter)) {
+		sdb_conn_node_t *node;
+		node = SDB_CONN_NODE(sdb_llist_iter_get_next(iter));
+		if (sdb_fe_analyze(node, errbuf)) {
+			sdb_llist_iter_destroy(iter);
+			sdb_llist_destroy(yyextra.parsetree);
+			return NULL;
+		}
+	}
+	sdb_llist_iter_destroy(iter);
+	return yyextra.parsetree;
+} /* sdb_fe_parse */
+
+sdb_store_matcher_t *
+sdb_fe_parse_matcher(const char *cond, int len, sdb_strbuf_t *errbuf)
+{
+	sdb_fe_yyscan_t scanner;
+	sdb_fe_yyextra_t yyextra;
+
+	sdb_conn_node_t *node;
+	sdb_store_matcher_t *m;
+
+	int yyres;
+
+	if (scanner_init(cond, len, &scanner, &yyextra, errbuf))
+		return NULL;
+
+	yyextra.mode = SDB_PARSE_COND;
+
 	yyres = sdb_fe_yyparse(scanner);
 	sdb_fe_scanner_destroy(scanner);
 
@@ -65,8 +131,62 @@ sdb_fe_parse(const char *query)
 		sdb_llist_destroy(yyextra.parsetree);
 		return NULL;
 	}
-	return yyextra.parsetree;
-} /* sdb_fe_parse */
+
+	node = SDB_CONN_NODE(sdb_llist_get(yyextra.parsetree, 0));
+	if (! node) {
+		sdb_strbuf_sprintf(errbuf, "Empty matcher expression '%s'", cond);
+		sdb_llist_destroy(yyextra.parsetree);
+		return NULL;
+	}
+
+	assert(node->cmd == SDB_CONNECTION_MATCHER);
+	m = CONN_MATCHER(node)->matcher;
+	CONN_MATCHER(node)->matcher = NULL;
+
+	sdb_llist_destroy(yyextra.parsetree);
+	sdb_object_deref(SDB_OBJ(node));
+	return m;
+} /* sdb_fe_parse_matcher */
+
+sdb_store_expr_t *
+sdb_fe_parse_expr(const char *expr, int len, sdb_strbuf_t *errbuf)
+{
+	sdb_fe_yyscan_t scanner;
+	sdb_fe_yyextra_t yyextra;
+
+	sdb_conn_node_t *node;
+	sdb_store_expr_t *e;
+
+	int yyres;
+
+	if (scanner_init(expr, len, &scanner, &yyextra, errbuf))
+		return NULL;
+
+	yyextra.mode = SDB_PARSE_EXPR;
+
+	yyres = sdb_fe_yyparse(scanner);
+	sdb_fe_scanner_destroy(scanner);
+
+	if (yyres) {
+		sdb_llist_destroy(yyextra.parsetree);
+		return NULL;
+	}
+
+	node = SDB_CONN_NODE(sdb_llist_get(yyextra.parsetree, 0));
+	if (! node) {
+		sdb_strbuf_sprintf(errbuf, "Empty expression '%s'", expr);
+		sdb_llist_destroy(yyextra.parsetree);
+		return NULL;
+	}
+
+	assert(node->cmd == SDB_CONNECTION_EXPR);
+	e = CONN_EXPR(node)->expr;
+	CONN_EXPR(node)->expr = NULL;
+
+	sdb_llist_destroy(yyextra.parsetree);
+	sdb_object_deref(SDB_OBJ(node));
+	return e;
+} /* sdb_fe_parse_expr */
 
 /* vim: set tw=78 sw=4 ts=4 noexpandtab : */